Dissertations / Theses on the topic 'Construction technology'
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So, K. L., and 蘇建霖. "A study of construction noise control technology." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31254743.
Full textBusfield, Robert. "The social construction of domestic computer technology." Thesis, University of Surrey, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326739.
Full textKim, Youman 1975. "Strategic advantages of information technology in construction." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/29569.
Full textIncludes bibliographical references (leaves 64-66).
Over the past decades, the dramatic progress of information technology has contributed distribution of innovative systems to most of industries in the world. Such technologies offer strategic advantages to gain competitive advantage, improving productivity and performance, developing new ways of managing and organizing. In this thesis, I explore and evaluate the impact of information technology in construction industry. I exhibit what strategic advantages can be gained from implementing innovative technologies within an organization and industry as a whole. In addition, I examine the knowledge management strategy as a part of advantages of technology. Some challenges to adopting innovations are addressed as well as the potential solutions. The purpose of this research is to provide a strategic vision for information technology in construction during the next decade.
by Youman Kim.
S.M.
Zhai, Dong. "THE RELATIONSHIP BETWEEN INFORMATION TECHNOLOGY AND CONSTRUCTION PRODUCTIVITY." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/44.
Full text尤孩明 and Haiming You. "Organizational strategies for construction technology transfer to China." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31241281.
Full textYou, Haiming. "Organizational strategies for construction technology transfer to China /." Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21779545.
Full textClucas, Scott Richard. "Construction as a Curriculum Organizer for Technology Education." Diss., Virginia Tech, 1997. http://hdl.handle.net/10919/30772.
Full textPh. D.
Goodrum, Paul McGinley. "The impact of equipment technology on productivity in the U.S. construction industry." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3032971.
Full textMoore, Brian Cameron. "Modeling risk of lunar construction activities : a technology assessment approach." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/19032.
Full textWeidman, Justin Earl. "Dust Control Usage: Strategic Technology Interventions." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/26562.
Full textPh. D.
Hobson, David Allen. "Developing transparency masters for Introduction To Construction Technology for Indiana's industrial technology education curriculum." Virtual Press, 1988. http://liblink.bsu.edu/uhtbin/catkey/544154.
Full textDepartment of Industry & Technology
Zuiderent, Teun. "The construction of technology assessment : towards a symmetrical approach of technology, morality and politics /." [Roskilde] : [Roskilde Universitetscenter] : Universiteit Maastricht, 1999. http://huizen.dds.nl/~mantana.
Full textStewart, Rodney Anthony, and r. stewart@griffith edu au. "Lifecycle Management of Information Technology (IT) Projects in Construction." Griffith University. School of Engineering, 2003. http://www4.gu.edu.au:8080/adt-root/public/adt-QGU20030423.122317.
Full textGrip, William George. "Applications of bar code technology in the construction industry." Thesis, Monterey, California. Naval Postgraduate School, 1991. http://hdl.handle.net/10945/25694.
Full textRamcharan, Rachel Susan. "Strategic impact of innovations in information technology in construction." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/10392.
Full textHohauser, Robyn Lisa. "The Social Construction of Technology: The Case of LSD." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/36973.
Full textMaster of Science
Odigie, Hendrix. "Technology transfer strategies and practices in Nigerian construction organisations." Thesis, University of Salford, 2012. http://usir.salford.ac.uk/26843/.
Full textAndrews, Samuel Ross. "Chronicling process model construction using World Wide Web technology." Thesis, University of Edinburgh, 2001. http://hdl.handle.net/1842/13507.
Full textБаранова, Ірина Володимирівна, Ирина Владимировна Баранова, Iryna Volodymyrivna Baranova, I. Voitsekhovskyi, and V. Zubko. "The Technology and Construction Methods of Digital Terrain Models." Thesis, Sumy State University, 2016. http://essuir.sumdu.edu.ua/handle/123456789/47052.
Full textHung, Yu-Hsiu. "How Technology Diffuses through Construction User Culture: An Innovation Design to Improve Safety Technology Adoption." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/40433.
Full textPh. D.
Perkins, Andrew David. "The development of technology for arresting falls using textiles." Thesis, University of Leeds, 1987. http://etheses.whiterose.ac.uk/4057/.
Full textOlaniyan, Rasaq. "Barriers to Technology Adoption Among Construction Project Managers in Nigeria." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7832.
Full textKassim, Y. H. "Information technology business value model for engineering and construction industry." Thesis, University of Salford, 2012. http://usir.salford.ac.uk/29324/.
Full textBrach, Ann M. (Ann Margaret) 1962. "Contextural knowledge and the diffusion of the technology in construction." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13299.
Full textSharp, Edward Ray. "The potential impact of information technology in the construction industry." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/45694.
Full textAltobelli, Frank Robert. "An innovative technology in concrete construction--semi-automated rebar tying." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/45703.
Full textRanjith, Adam. "Thermal Energy Storage System Construction." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-264530.
Full textInom ramverket för 2020 PUPM HEAT projektet kommer tre olika typer av värmeenergilagrings enheter tillverkas och analyseras vid energikraftverket IREN i Moncalieri, Italien. KTH kommer att assistera detta projekt genom att sätta upp en anläggning med tre liknande värmeenergilagrings enheter i mindre dimensioner som kommer konstrueras och analyseras. Dess data kommer sedan användas som riktlinje för att tillverka de större värmeenergilagringsenheterna i IREN. Den första enheten som tillverkas är en värmeväxlare som bygger på en ny version av latent energilagring. Den kommer att bestå av parallella lager av spiral formade koppar rör som fyller en tank. Tomrummet som blir över kommer att fyllas upp av fasändrings material (PCM). Genom att injicera varmt vatten i systemet kommer PCM:et att byta fas, vilket resulterar i att värmeenergin lagras i systemet. När sedan kallt vatten injiceras kan den sparade energin bli utvunnen. Den här rapporten kommer att presentera designen till tank kåpan såväl som den inre strukturen med kopparrör som behövs till värmeväxlaren. Resultatet ska möjliggöra beställning av alla delar som behövs för att konstruera värmeväxlaren.
Bowden, Sarah L. "Application of mobile IT in construction." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/794.
Full textOng, Choon Wei Roy. "Investigation of advanced personnel armor using layered construction." Thesis, Monterey, California : Naval Postgraduate School, 2009. http://edocs.nps.edu/npspubs/scholarly/theses/2009/Dec/09Dec%5FOng_Choon%20Wei.pdf.
Full textThesis Advisor: Hixson, Robert S. Second Reader: Sinibaldi, Jose O. "December 2009." Description based on title screen as viewed on January 26, 2010. Author(s) subject terms: Ceramic, composite armor, Dyneema, orthotropic materials, penetration resistance, porous foams. Includes bibliographical references (p. 89-90). Also available in print.
Caerteling, Jasper Sebastiaan. "Technology development in road construction how government roles affect project performance /." Enschede : University of Twente [Host], 2008. http://doc.utwente.nl/59766.
Full textClory, Eric M. (Erick Mickael). "Information technology opportunities in the construction industry : a strategic business plan." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/40998.
Full textHultgren, Michael, and Fredrik Pajala. "Blockchain technology in construction industry : Transparency and traceability in supply chain." Thesis, KTH, Fastigheter och byggande, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231752.
Full textMed ökat antal byggmaterial som tillverkas genom globala komplexa försörjningskedjor ökarkvalitetskraven inom byggbranschen samt behovet att säkerställa hållbarheten hos dessamaterial. Syftet med denna studie är att bedöma hur blockkedjeteknik kan användas för attsäkerställa dagens och framtidens krav på byggindustrin och analysera dess potentiellakonsekvenser vid ett användande av tekniken. Detta arbete undersöker följaktligen hurblockkedjeteknik kan stödja transparens och spårbarhet i leverantörsledet.För att analysera hur tekniken kan påverka en typ av byggmaterial har en fallstudie utförts isyfte att kartlägga ett leverantörsled. Fallstudien har fokuserat på hur materialet hanteras, fråndess ursprung tills att det anländer till byggarbetsplatsen. En hypotetisk leverantörskedja harkonstruerats och analyserats i termer av transparens, spårbarhet och vilka olika konsekvenserdet kan medföra. Vi har speciellt fokuserat på hur blockkedjesystemet kan konstrueras, vemsom ska äga systemet och hållbara aspekter.Slutsatsen är att blockkedjeteknik kan öka transparensen genom hela leverantörsledet. Detfinns emellertid ett behov av komplimenterande teknik att lösa spårbarhet. Ett exempel pådenna komplimenterande teknik är RFID taggning. Slutligen har ett antal konsekvenserfastställts vid ett användande som är; hanteringen av dokumentationen förbättras, ryktet inomindustrin förbättras och möjligheten att ersätta tredjepartsorgan ökar.
Obuzor, Gift Nwadinma. "Development of technology for the construction of low-cost road embankments." Thesis, University of South Wales, 2011. https://pure.southwales.ac.uk/en/studentthesis/development-of-technology-for-the-construction-of-lowcost-road-embankments(e92d7c4e-e9d5-47e8-bf8e-e4b66769dd2d).html.
Full textDuerr, Douglas K., and Douglas K. Duerr. "A computer tutorial as a pedagogical tool for building construction technology." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/626032.
Full textHashemi, Arman. "Construction technology transfer : an assessment of the relevance of modern methods of construction to housing shortages in Iran." Thesis, Cardiff University, 2009. http://orca.cf.ac.uk/55463/.
Full textHardcastle, Clifford. "An information model of the construction cost estimating process." Thesis, Heriot-Watt University, 1992. http://hdl.handle.net/10399/1386.
Full textSoto, Fernández Francisco, and Athanasios Diamantopoulos. "Impact of Technology and Leadership in Virtual Team Performance within the Construction Industry." Thesis, Blekinge Tekniska Högskola, Institutionen för industriell ekonomi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-21894.
Full textLee, Chia-Ching, and 李家慶. "Exploring Construction Technology Nature and Organization." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/07731172406250093121.
Full text國立成功大學
土木工程學系碩博士班
91
Construction management studies address mostly the phenomena of construction problems. Although many analyze the cause-effect relationships of real issues, few studies explore the nature of construction technology (production system). The government has promoted the construction automation programs to advance production efficiency for past years. Moreover, the issue of electronic business also has been included recently. The progress of automated construction systems is slow comparing with it in the manufacturing industry. It may be limited by the nature of construction technology. Thus, we should examine and understand the construction technology fundamentally before pushing successive construction automation and e-construction programs. There had been longitudinal and latitudinal research on technology in the manufacturing industry, which could be served as the basis of exploring the nature of construction technology. For an enterprise to operate efficiently and successfully, its production system and organization should be compatible with each other. By in-depth interviews with experts, this study implements a systematical analysis about the present conditions of construction organizations from the aspects of organizational structure, process, and behavior. With the analysis, we can examine whether the work and conditions of construction organization is compatible with the needs of its technology, and find out the fundamental problems of construction improvement. Furthermore, this study also processes a complete review for the past and future direction of changing technology, and proposes practice suggestions to advance the construction industry. The findings of this thesis show that automation is difficult for the construction industry, but there is room to apply e-construction. Although the efficiency of construction technology as unit production is low, it has many advantages such as high flexibility, zero stocks, and satisfactory human social needs. With the appearance of new production systems such as mass production and continuous production, it doesn''t mean that the old unit production will be replaced. Even though the final construction products couldn’t be standardized entirely, we can standardize their components, and fundamentally rethink their assembling and integrating methods to increase production efficiency. Construction industry should reserve the advantages of its present production system, and pursue the advancement of managerial efficiency.
Mota, Tiago Furtado Piques Martins. "Blockchain technology for the construction industry." Master's thesis, 2020. http://hdl.handle.net/10071/20985.
Full textUm dos desafios que a indústria da construção enfrenta é a falta de confiança entre os intervenientes e os sistemas de partilha de informação. Blockchain é uma tecnologia disruptiva e emergente que pode ser usada para adicionar imutabilidade, confiança e transparência à informação. A presente dissertação propõe uma plataforma que pretende mitigar o problema de partilha de informação na indústria da construção utilizando a tecnologia blockchain. A plataforma permite manter um registo imutável das alterações efetuadas em ficheiros partilhados entre os vários intervenientes da obra e simular assinaturas de documentos que possam ser, posteriormente, verificadas. Foi desenvolvida uma prova de conceito utilizando a rede Ethereum sendo, de seguida, utilizada para avaliar a influência do preço unitário do gas na duração de execução da transação e o seu custo. Conclui-se que a tecnologia blockchain pode auxiliar a partilha de informação na indústria da construção.
Chen, Chun-Ch'eng, and 陳俊誠. "Architectual Research and Development Planning - Construction Technology." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/84888379903071430339.
Full text國立臺灣科技大學
營建工程技術學系
81
This paper is a discussion and study result for the @costruction technology in the Architectural Research and @development Planning. The content is composed by the research @items whereas the technical problems in construction need to be @solved under current State of the Art. The study is divided into @five diffident areas which are groundwork, structural body, @architectural details, equipments and other related items @regarding to construction. After investigation team has reached @some tentative conclusion. Experts from each field are invited @to discuss the results. Certain modification are made according @to the recommendation form experts. Then the final arrangement @including order, content, benefits, expense, manpower, and @related institute are suggested for future execution. Finally, @this paper will sent to relation of departments for future @reference in research and development on Construction @Technology.
Chiang, Jung-Fa, and 江榮發. "3D Exploration of curved wall construction technology." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/14177681057883523824.
Full text國立交通大學
工學院碩士在職專班工程技術與管理組
98
ABSTRACT At present in internal the structure of 3D curved wall construction technology, literature almost no case may test, general common structure for the 2D curved wall construction methods, structural design relatively simple curve regularity or uniformity in hardware and software requirements and technical level general platform that is able to work, the office software and hardware Jieneng to meet the demand of construction drawings. The 3D technology must adopt a higher order of hardware to meet the demand, the difference is that the temporary increase in memory capacity, increase the use of hard disk space and computing power with high-speed video graphics accelerator card and software also need to be more professional. Operating engineer must have a skilled 3D computer skills and expertise before being qualified. This study focused on 3D curved wall construction techniques and construction feasibility, and planning and design to construction stage of the main points to be considered to be pooled, and the provision of internal plans for 3D curved wall in the formulation and risk assessment. Another provision of the construction plan to write proposals, on the pre-construction and construction issues to be considered. Analysis of 3D curved wall of the key technologies to provide domestic industry planning for 3D curved wall for reference. If the technology used in complex and more general engineering, technology and the development of more complete applications will be just around the corner. 3D curved wall construction technology as the first domestic case of the construction is very high, curved wall of technical barriers to point to the cost, time and project risks, and actual production of this research building model representative of the construction of curved wall experiment primarily to confirm the construction of technical obstacles to a comprehensive verification, which verify the results will be an important reference for the construction of the construction parameters, so as to 3D structure for the future construction of curved walls offer the best of the contribution.
Fan, Su-Ling, and 范素玲. "Application of object-oriented technology for construction." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/04168507678551258068.
Full textJHANG, MING-SING, and 張明星. "The Relationships among Information Technology, Technology Innovation and Project Performance in Construction." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/93911058315912154173.
Full text國立高雄應用科技大學
土木工程與防災科技研究所
101
With the development of globalization and information technology (IT), companies are switching from the competition strategies focusing on mass production to customized models of cost reduction, fast response and flexibility. In this era of knowledge economy marked with massive competition stress, technology innovation capability has become the key for companies to maintain their competitiveness. The past studies mostly focused on the connections between construction project characteristics and project performance to explore how to improve the general construction efficiency. Few of them discussed the influences of IT competence, relationships with property owners, and technology innovation capability of construction companies on their project execution performance. The subjects of this study are mainly practictioners in the construction industy in Taiwan. Totally 200 questionnaires were sent with 161 valid samples returned. The returned samples were statistically analyzed using SPSS and the analysis results were used to reach the following findings and suggestions: 1.The sample structure analysis results indicate that the subjects relatively highly agreed that the construction companies in Taiwan have good IT competence (average score=5.20 points), relationships with property owners (average score =5.26 points), and construction project performance (average score =5.26 points). However, the subjects slightly agreed the construction companies in Taiwan have technology innovation (average score=4.91 points). 2.Through the correlation analysis, it was found that a company’s IT competence, relationships with property owners, technology innovation and construction project performance are significantly and positively correlated with each other. 3.The path analysis in this study found that in the dimensions of a company’s IT, relationships with property owners and technology innovation, the technology innovation capability has a significant influence on the construction project performance (R2=0.524), indicating better technology innovation capability will be helpful for promoting better construction project performance. In addition, in the dimensions of a company’s IT, relationships with property owners and technology innovation capability, IT (F=34.117**, p<0.01) and relationships with property owners (F=87.498**, p<0.01) each has a significant influence on the company’s technology innovation capability.
Hsieh, Chao-chin, and 謝朝欽. "A Construction Study On Relocation Technology In Taiwan." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/92070773484701759291.
Full text南華大學
建築與景觀學系環境藝術碩士班
100
Taiwan will soon face the loss of one of the traditional art ---- shift housing. Most of the special traditional art craftsmen group developed from the Yonghe, Puzi, Chiayi County. The shifting art skill of traditional soil angular house, bamboo house, the traditional courtyard houses, temples and other buildings of historic has the problem of shortage of talent due to the industrial decline and the average aging growth of the craftsmen recently. This study mainly focuses on the characters’ interviews and case studies along with the collection and analyze of historical documents. Hope to compile the context of the development of the buildings’ shift activities and to preserve the traditional art of the original shifting house skill also awaken public emphasis to pass down the tradition. As Taiwan''s economic takeoff, the urban renewal plan gradually adjusts. It’s getting difficult to maintain the historical buildings. The passing down of the shifting technology system can’t be wait. This study will review the process of shifting technology, shifting tools and the related legal regulations in Taiwan, Japan, China, the United States and Europe by the preservation of the building restoration concept and implementation of practical technology. After proposing comparison and review, hope to enhance the engineering capabilities of the shift housing industry and develop the standard operating processing and engineering techniques which adapt to the existing environmental characteristics and take into account the economic, security and accuracy.
CHEN, CHUNG-TA, and 陳重達. "The Study of Full-Casing Pile Construction Technology." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hagtkn.
Full text中華大學
土木工程學系
106
In recent years, with the construction of large-scale public infrastructures, such as construction of traffic bridges, high-rise buildings, factories, etc., the frequency of use of piles has become more and more frequent, especially the full-casing piles have been widely used. Therefore, it is necessary to further study the characteristics of the construction of the whole casing pile. This study will focus on the full-casing construction to explore its engineering characteristics in different situations. In order to obtain the relevant problems in the practice of the whole casing pile construction technology, this study carried out a series of related cases and possible problems in practical problems. The research results show that the full casing pile has many advantages, because the drilling process has the steel casing prevents the soil from collapsing, so that the pile quality is good, and it can be applied to various geological and topography with different drilling equipment and excavation facilities, and has considerable experience in different geology and topography for practical use. For quite mature work methods. In addition, through the special case study in practice, due to the advantages of small construction space, simple tools, flexible movement, etc., the special casing geology and the lack of base space can be used to make semi-circular retaining piles. The section of the soil facility is halved, and the available area of the basement is increased. The construction speed can shorten the construction period, reduce the project cost, increase the land and project expenditure to achieve the maximum benefit.
"Development of appropriate road construction technology for Venda." Thesis, 2014. http://hdl.handle.net/10210/12892.
Full textGu, Yuan Zhang, and 古元章. "An investigation on the natrue of construction technology." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/69593761862472569580.
Full textHsueh, Hui-Ching, and 薛惠卿. "Construction of the Reciprocating Drive System Design Technology." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/78528303661692428944.
Full text明新科技大學
精密機電工程研究所
101
In this study, by the known conditions to study how to select the appropriate ball screw design that best fits the needs of specifications and software features calculated by ball screws related stress. Use Excel worksheet functional relationship between, depending on demand computing and determining the appropriate ball screw specifications, calculations contains: axial load, stroke, speed, average load, average speed and lifetime of such operations, and then the moment of inertia and the motor drive torque calculations, and then based on the aforementioned content and related allowable compressive load and other stress calculation. With Excel calculates the maximum axial load and maximum drive torque result, its value is substituted into ANSYS APDL simulation program for analysis. APDL simulation program ballscrews length, root diameter, variable torque .. mused set function, variable function settings allow users to quickly Modeling and Analysis. The results show, Excel calculate the relationship between simulation with ANSYS APDL analysis results are consistent, which means that this research can be widely used rapid calculation, ball screws used must calculate the related content. Keywords: Ball screw, ANSYS ,APDL
HUANG, CHI-CHIEH, and 黃契介. "Research of Flat KAISER Truss Board Construction Method of the Designed and Constructive Technology Guideline." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/20778486214795971738.
Full text國立成功大學
建築(工程)學系
85
The half-Precast composed slab has being used applied for over 20 years in Taiwan. Especially, Flat Kaiser truss boards, is common applied by internal company. There*re a lot of blind in the applied process of designing and constructing, meanwhile, causing serious battlements in the chain of construction quality controlling. In the surrey process for KT slab construction designing method. We find that, most of internalcompanies, directly use 「Kaiser board designed, manufacture, construction point」and「Kaiser wall-panel designed, manufacture, construction point」from Japanese company. Since the shortage of the relative experience, and then, produce the opinion seems correct concert. But, the KT Board Construction method of designed and constructive technology guideline result in technique. For ordering the planning method or process by conference of professor*s opinion and the conclusion of symposium, in the process, lack of the internal original mode, the present method cannot meet the demands for internal condition.So, it*s necessary to researching of the flat Kaiser Truss Board Construction method of the designed and constructive technology guideline. Research Purpose:1.According to the interview and observations, understanding the problem of KT board during evening stage.2.Research of the flat Kaiser truss board construction method of designed and constructive technology guideline. Research process: Being aware of the relative document, we try to develop the structure of observation method on thebasis of research result. Japanese company*s specification and engineering experiences, etc. And thus by the method ofobservation and interview, including the present status problem of the Flat Kaiser Truss Board inTaiwan, and comparing the difference of foreign. At last, according to the internal specification to order the Research of Flat KAISER Truss BoardConstruction Method of the Designed and Constructive Technology Guideline Research Results:1.COllecting the present question of KT board.2.Research of the flat Kaiser truss board construction method of designed and constructive technology guideline.
Li, Chun-Yi, and 李俊儀. "Development of Technology for Liner Construction in Treatment Wetlands." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/30513248899599047446.
Full text嘉南藥理科技大學
環境工程與科學系暨研究所
95
For the past three decades, constructed wetlands have become an effictive and low-cost ecological technology for water pollution control. Sealing the basin by using the liners is one of the important design and construction works of constructed wetlands. Its aim is to prevent the contamination of groundwater or prevent groundwater from infiltrating into the constructed wetlands. At the present, there is still a lack of suitbable evaluation workflow that is in line with local conditions for sealing the basins of constructed wetlands, which can be used as reference for the design and construction of constructed wetlands. This thesis collected on-site soil from 13 different sites in sourthern Taiwan and tested their various proterties in the lab, including: particle size distribution, effective size, soil texture, and hydraulic conductivity. By using soil compaction experiment and the experiment of adding material of low hydraulic conductivity, an effective method to line the constructed wetlands will be developed, and a standard workflow for evaluating a suitable lining method through considering on-site soil properties will be established. The result of soil texture analysis shows that clay content of the soil samples from 13 different sites was about 10~27%, silt content 13~67% and sand content 10~75%. Nine of the soil samples was determined to be silt loam, one to be loam, and three to be sand loam. The hydraulic conductivity of soil in the Moon World mud pool was the lowest, 6.40×10-7 cm/sec; the hydraulic conductivity of soil in the Erh Hang village and Golden Seacoast is the highest, 5.7×10-4 and 1.96×10-3㎝/s, respectively. The hydraulic conductivity of soil was found to be exponentially proportional to effective sizes of soil grains (D20, D30, D40 or D50). The hydraulic conductivity (K) has higher corelation with D30 than other effective sizes, the corelation equation is K=0.01×D301.21945 (R2=0.72), which can be considered as an useful emperical model for estimating hydraulic conductivity of soil from other areas. This study also examined the corelation between the hydraulic conductivity of soils and the three elements contents of soil texture properties by using the way of multi-variables regression method. The result shows that the regression equation with higher corelation coefficient was obtained when hydraulic conductivity was related with all the three elements contents simultaneously (R2=0.659), while regression equation with lower corelation coefficient was found, if hydraulic conductivity was related with contents of two elements or single element. The multiple variable regression equotion is: Which can aslo be applied to estimate the hydraulic conductivity of soils. Soil samples obtained from five various sites were used to conduct the soil compaction experiment. The result shows that the amount of water addition and tapping times are the key factors that affected soil compaction result, when compacting soil. When compacting at water addition of 13.2~14.6%, under the same tapping times, the hydraulic conductivity of compaction soil sample is obviously lower than at water addition of 9.0~9.6%. But when water addition amount rose to 17.3~18.9%, the hydraulic conductivity of compacted soil did not further effectively reduce. In addition, under the same amount of water addition, the hydraulic conductivity of compacted soil decreased with the increase of tapping times; however, when tapping were over 30 times, the increase of tapping times had no obvious effect on the decrease of hydraulic conductivity. The addition experiment of low hydraulic conductivity material shows that with enough water addition, compared with the soil group without adding bentonite, the hydraulic conductivity of the soil group that with little addition of bentonite(2~5%) decreased about more than 30%, and achieved to a criterion <1×10-6 cm/sec. The experiment also proves that using commercial and easily available material, bentonite, which needs only small amount addition, can replace the natural soil of high clay content, which needs comparably high amount addition, to reach the result of decreasing hydraulic conductivity of soil. This method can be used as alternative and effective construction method for the liners of constructed wetlands. This study finally established a workflow for evaluating the best construction method of liners of constructed wetlands, which could provide a guideline for the site selection, plan and design of constructed wetlands.