装配叠合整体式地下车站防水关键技术研究及工程应用
朱军1刘毅2彭宇一2秦凯2
Research and Engineering Application of Key Waterproof Technology for Underground Stations with Assembled Superposed Structure
ZHU Jun1LIU Yi2PENG Yuyi2QIN Kai2
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作者信息:1.无锡地铁集团有限公司，214100，无锡
2.无锡地铁建设有限责任公司，214100，无锡
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Affiliation:1.Wuxi Metro Group Co., Ltd., 214100, Wuxi, China
2.Wuxi Metro Construction Co., Ltd., 214100, Wuxi, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2025.03.038
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中图分类号/CLCN:U231.4
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栏目/Col:施工技术
摘要:
［目的］建于岩土层中的地下车站，长期遭受地下水侵蚀与压力渗透作用，若防水措施失效，将引发渗漏水问题。渗漏水的存在不仅影响乘客体验，降低运营服务质量，威胁系统设备安全，还会缩减混凝土结构的使用寿命。因此，有必要对装配叠合整体式地下车站防水关键技术进行深入研究。［方法］以无锡至江阴城际轨道交通工程南门站为实例，提出了该类型装配式车站“三合一”防水体系的整体设计理念，并对新老混凝土粘接面处理工艺及微膨胀低收缩抗裂混凝土两项关键技术进行了试验研究。［结果及结论］试验结果表明，对于主要受拉力的粘接面，水洗露骨料施工工艺更为适用；而对于主要受剪力的粘接面，凿毛施工工艺则更为适宜。此外，通过复掺轻砂内养护剂和膨胀剂，所制备的混凝土展现出了优异的低收缩抗裂性能。
Abstracts:
［Objective］ Underground stations constructed in soil and rock layers are subject to long-term groundwater erosion and pressure infiltration. If waterproofing measures fail, water leakage issues may arise. Such leakage not only affects passenger experience and reduces operational service quality, but also poses risks to system equipment safety and shortens the service life of concrete structures. Therefore, it is essential to conduct in-depth research on key waterproofing technologies for underground stations with assembled superposed structure (abbreviated as AS station). ［Method］ Using the Nanmen Station of Wuxi-Jiangyin Intercity Rail Transit Project as a case study, an integrated ′three-in-one′ waterproofing system is proposed for AS stations. Experimental studies are conducted on two key technologies: the treatment of bonding surfaces between new and old concrete and the use of micro-expansion, low-shrinkage, crack-resistant concrete. ［Result & Conclusion］ Experimental results indicate that for bonding surfaces primarily under tensile forces, the water-washed aggregate exposure construction technique is more suitable, while for those under shear forces, the roughened surface construction technique is more appropriate. Additionally, concrete prepared with a combination of lightweight sand internal curing agents and expansive agents exhibits excellent low-shrinkage and crack-resistant performance.
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