使用10年的复杂深基坑设计案例分析

ANALYSIS OF COMPLEX DEEP FOUNDATION PIT DESIGN CASES THAT HAVE BEEN IN USE FOR 10 YEARS

以使用10年的深基坑为实例,根据超期锚索抗拔力试验结果,分析了不同阶段的基坑支护设计方案,并对基坑加深导致止水帷幕深度不足、工程桩施工、受损支护结构的加固、支护桩开裂、支撑内出土坡道空间不足等问题进行了分析处理。实施和监测结果表明,基坑加固后,整个基坑支护体系处于稳定状态,为以后类似工程的设计施工提供了参考。

Taking a deep foundation pit that has been in use for 10 years as an example,based on the results of the extended anchor cable pull-out resistance test,the design schemes of foundation pit support at different stages were analyzed.The problems of insufficient depth of the waterproof curtain caused by the deepening of the foundation pit,construction problems of engineering piles,reinforcement problems of damaged support structures,cracking problems of support piles,and insufficient space for the excavated slope inside the support were analyzed and dealt with.The implementation and monitoring results indicate that the entire foundation pit support system is in a stable state after the foundation pit reinforcement,providing a reference for similar engineering design and construction in the future.