盖挖逆作法施工地铁车站叠合墙综合防水体系
雷涛1漆继良1施成华2孙晓贺2
Comprehensive Waterproof System for Composite Walls in Metro Station Constructed by Coverexcavation Reverse Method
LEI TaoQI JiliangSHI ChenghuaSUN Xiaohe
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作者信息:1.中交一公局集团有限公司， 100162， 北京
2.中南大学土木工程学院， 410075， 长沙
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Affiliation:CCCC First Highway Engineering Group Co., Ltd., 100162, Beijing, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2023.09.012
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中图分类号/CLCN:TU761.1+1∶U231.4
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栏目/Col:研究报告
摘要:
盖挖逆作法施工地铁车站叠合墙中无法铺设柔性防水层，一旦发生渗漏水不仅影响结构耐久性，同时也会增加后期封堵费用，因此叠合墙结构防水是地铁车站工程施工的重点和难点，需进行针对性研究。方法：分析了叠合墙的地下连续墙、内衬墙及其他关键位置发生渗漏水的原因；以长沙地铁6号线朝阳村站工程为依托，介绍了叠合墙综合防水体系的多道防水技术，包括围护结构防水、防水涂料防水、渗漏点预处理、内衬墙防水和预埋注浆管防水；介绍了各道防水技术实施过程中所采用的新技术和新装置，并提出了相应的保障措施和注意事项。结果及结论：长沙地铁6号线朝阳村站自工程完工后的3年使用期间未发生渗漏水现象，表明所提出的叠合墙综合防水体系防水效果良好。
Abstracts:
Flexible waterproof layers cannot be installed in composite walls of metro stations constructed by coverexcavation reverse method, because once water leakage occurs, it not only affects the structural durability, but also increases the cost of later sealing. Therefore, waterproofing for composite wall structure is a crucial and difficult aspect in metro station engineering construction, requiring targeted research. Method: The reasons for water leakage in diaphragm walls, inner linings and other critical locations of the composite walls are analyzed. Based on Changsha Metro Line 6 Chaoyangcun Station project, multiple waterproofing techniques in composite wall comprehensive waterproof system are introduced, including retaining structure waterproofing, waterproof coating, pretreatment of leakage points, inner lining waterproofing, and preembedded grouting pipe waterproofing. New technologies and devices used in the implementation of each waterproofing technique are presented, along with corresponding safeguard measures and precautions. Result & Conclusion: During the three years of usage after the completion of Changsha Metro Line 6 Chaoyangcun Station, no water leakage occurred, indicating that the proposed composite wall comprehensive waterproof system performs well.
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