建宁排渍站深基坑工程对近站防洪堤的影响分析

Impact Analysis of Jianning Drainage Station Deep-foundation Engineering on Near Station Flood Control Embankment

以建宁排渍站基坑工程为例,基于基坑设计及地质勘察资料,采用极限平衡法和有限差分法,分析了基坑开挖支护施工对防洪堤的影响,并对工程施工提出了合理化建议和安全防范措施。结果表明,采用边开挖边支护的施工工艺能保证堤防整体抗滑安全系数及基坑渗透稳定满足规范要求,基坑外及堤身土体变形沉降、堤身土体应力等满足安全要求。

This paper takes Jianning drainage station deep-foundation engineering as an example, based on the foundation pit design and geological survey data, using the limit equilibrium method and the finite difference method, analyzes the influence of foundation pit excavation support construction on flood control embankment, and puts forward the reasonable suggestions and safety precautions for engineering construction. The results show that the construction technology that excavating and supporting are carried out simultaneously can ensure the integral safety factor of the embankment and the seepage stability of foundation pit to meet the requirements of the standard, the settlement and deformation of foundation pit and soil embankment, levee soil stress meet the safety requirements.