复杂环境下超宽深大基坑设计与施工技术分析——以X352县道改扩建工程项目为例

Design and Construction Technology Analysis of Super Wide,Deep and Large Foundation Pit in Complex Environment——Taking X352 County Road Reconstruction and Expansion Project as an Example

随着城市化进程,基坑开挖深度和面积越来越大。苏州市X352县道改扩建工程三标段基坑开挖深度达到18 m,宽度达到61.5 m,同时周围环境复杂,地下管线密布,设计和施工难度较大。通过对降水、支护结构和施工工艺等方案进行比选设计,优化了基坑围护结构的受力性能,加强了基坑稳定性,同时也进一步改善了施工的便捷性。该工程的设计和施工可以为相关工程建设提供参考。

With the development of urbanization,the depth and area of the tunnel foundation pit are increasing.The depth of foundation pit is 18 m,and the width is 61.5 m in X352 Country Road Reconstruction and Expansion Project in Suzhou.The surrounding environment is complex due to the underground pipelines.Because of these,the design and construction are difficult.Through the optimization design of precipitation,enclosure and construction sequence,the stress system of foundation pit is improved,the stability of foundation pit strengthened,and the construction time is also shortened.The design and construction of the project can provide reference for related engineering construction.