預應力混凝土連續(xù)T梁負彎矩施工技術(shù)研究
發(fā)布時間：2019-03-22 06:39
【摘要】：預應力混凝土是先給混凝土施加預壓應力，用來減小或抵消荷載所引起的混凝土拉應力，從而將結(jié)構(gòu)構(gòu)件的拉應力控制在較小范圍，甚至處于受壓狀態(tài),以推遲混凝土裂縫的出現(xiàn)和開展，從而提高構(gòu)件的抗裂性能和剛度，能充分發(fā)揮高強材料的抗壓強度高的特性，減少用料，使結(jié)構(gòu)輕型化。 預應力混凝土連續(xù)梁橋具有比鋼筋混凝土連續(xù)梁橋更大的跨越能力，具有超載能力大、養(yǎng)護簡便、變形和緩、伸縮縫少、剛度大、行車平穩(wěn)等優(yōu)點。由于國內(nèi)施工單位的質(zhì)量責任心和現(xiàn)場技術(shù)管理水平以及實際操作隊伍技術(shù)工作水平參差不齊，預應力混凝土連續(xù)T梁頂板負彎矩區(qū)施工很容易產(chǎn)生施量問題，只有確保負彎矩張拉壓漿的施工質(zhì)量，才能有效地提高橋梁的整體穩(wěn)定性和耐久性，預防橋梁的早期破損，提高橋梁的安全性。 通過在承赤高速監(jiān)理的2合同老虎溝大橋和西道村大橋，對老虎溝大橋和西道村大橋的負彎矩施工從施工準備階段到施工階段再到后期的數(shù)據(jù)處理，采用了全過程參與旁站的方式，通過咨詢導師，查閱規(guī)范和書籍以及與監(jiān)理辦，項目部技術(shù)人員相互學習和討論，找出了保證工程質(zhì)量的關(guān)鍵工序，發(fā)現(xiàn)并解決了施工中出現(xiàn)的問題，，使工程質(zhì)量達到了合格標準，工程評定為優(yōu)良。
[Abstract]:The prestressing stress of prestressed concrete is used to reduce or counteract the tensile stress of concrete caused by load, so as to control the tensile stress of structural members in a small range or even in a state of compression. In order to delay the occurrence and development of concrete cracks, so as to improve the crack resistance and stiffness of members, the characteristics of high compressive strength of high strength materials can be brought into full play, the use of materials will be reduced, and the structure will be lighter. Compared with reinforced concrete continuous beam bridge, prestressed concrete continuous beam bridge has many advantages, such as large overloading capacity, easy maintenance, low deformation and slow deformation, less expansion joint, large stiffness and smooth driving, etc. The prestressed concrete continuous beam bridge has the advantages of larger span ability than reinforced concrete continuous beam bridge. Due to the uneven quality responsibility and on-site technical management level of domestic construction units as well as the technical work level of the actual operation team, the construction of prestressed concrete continuous T-beam roof negative moment area is easy to produce the construction quantity problem. Only by ensuring the construction quality of the negative moment tension grouting, can the overall stability and durability of the bridge be improved effectively, the early damage of the bridge can be prevented and the safety of the bridge can be improved. Through the negative bending moment construction of Laohugou Bridge and Xidao Village Bridge under the contract 2 of Chengchi Expressway Supervision, the data processing from construction preparation stage to construction stage to later stage of construction is carried out for the construction of Laohugou Bridge and Xidao Village Bridge. Using the way of participating in the whole process, by consulting the mentor, consulting the norms and books, and learning and discussing with the technical staff of the Office of Supervision and Management and the project department, the key processes to ensure the quality of the project are found out. The problems occurred in the construction are found and solved. The quality of the project reaches the standard of conformity and the engineering evaluation is excellent.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4
本文編號：2445352
[Abstract]:The prestressing stress of prestressed concrete is used to reduce or counteract the tensile stress of concrete caused by load, so as to control the tensile stress of structural members in a small range or even in a state of compression. In order to delay the occurrence and development of concrete cracks, so as to improve the crack resistance and stiffness of members, the characteristics of high compressive strength of high strength materials can be brought into full play, the use of materials will be reduced, and the structure will be lighter. Compared with reinforced concrete continuous beam bridge, prestressed concrete continuous beam bridge has many advantages, such as large overloading capacity, easy maintenance, low deformation and slow deformation, less expansion joint, large stiffness and smooth driving, etc. The prestressed concrete continuous beam bridge has the advantages of larger span ability than reinforced concrete continuous beam bridge. Due to the uneven quality responsibility and on-site technical management level of domestic construction units as well as the technical work level of the actual operation team, the construction of prestressed concrete continuous T-beam roof negative moment area is easy to produce the construction quantity problem. Only by ensuring the construction quality of the negative moment tension grouting, can the overall stability and durability of the bridge be improved effectively, the early damage of the bridge can be prevented and the safety of the bridge can be improved. Through the negative bending moment construction of Laohugou Bridge and Xidao Village Bridge under the contract 2 of Chengchi Expressway Supervision, the data processing from construction preparation stage to construction stage to later stage of construction is carried out for the construction of Laohugou Bridge and Xidao Village Bridge. Using the way of participating in the whole process, by consulting the mentor, consulting the norms and books, and learning and discussing with the technical staff of the Office of Supervision and Management and the project department, the key processes to ensure the quality of the project are found out. The problems occurred in the construction are found and solved. The quality of the project reaches the standard of conformity and the engineering evaluation is excellent.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U445.4
【參考文獻】
相關(guān)期刊論文 前1條
1 聶建國,樊健生;組合梁在負彎矩作用下的剛度分析[J];工程力學;2002年04期
本文編號：2445352
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