广州岩溶地区深基坑开挖对周围环境影响的研究

发布时间：2018-03-15 07:19

本文选题：岩溶地层　切入点：深基坑　出处：《岩土力学》2015年S1期 　论文类型：期刊论文

【摘要】：以广州地铁9号线在岩溶地区施工深基坑为例,研究岩溶地层基坑施工对周围环境的影响。该车站基坑长259.7 m,宽18.7 m,深15.8 m。基坑深度范围内包括溶洞和砂层,溶洞地层富水、稳定性差、物理力学性质差,砂层厚0~15 m,有较大的渗透性,基坑施工过程中对地下连续墙的侧向位移和地面沉降进行了监测。监测结果表明,基坑开挖结束时地下连续墙的最大侧向位移为12 mm,地面沉降的最大值为10.1 mm,基坑开挖过程中对周围环境的影响很小。研究成果可为今后类似工程施工提供经验借鉴。
[Abstract]:Taking Guangzhou Metro Line 9 as an example, the influence of the construction of deep foundation pit in karst strata on the surrounding environment is studied. The pit of this station is 259.7 m long, 18.7 m wide and 15.8 m deep. The depth range of the foundation pit includes karst cave and sand layer, and the karst formation is rich in water. The stability is poor, the physical and mechanical properties are poor, the sand layer thickness is 0 ~ 15 m, and the permeability is great. The lateral displacement and ground subsidence of underground continuous wall are monitored during the foundation pit construction. The monitoring results show that, At the end of excavation, the maximum lateral displacement of underground continuous wall is 12 mm and the maximum of ground subsidence is 10.1 mm. The influence of excavation on the surrounding environment is very small. The research results can provide experience and reference for the construction of similar projects in the future.
【作者单位】：上海交通大学土木工程系;上海交通大学海洋工程国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(No.2015CB057806)
【分类号】：TU753

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