某车行通道与排水箱涵共建基坑支护设计与应用

Design and Application of Foundation Pit Support for Co-construction of a Vehicle Passage and a Drainage Box Culvert

摘要:

结合武汉某通道基坑与排水箱涵共建基坑支护工程实例，详细阐述了该通道基坑及两侧排水箱涵基坑的周边环境、工程地质条件、标准段共建基坑支护方案、雨水泵房处共建基坑支护方案、消防泵房处共建基坑支护方案，通过合理布设支护桩与内支撑结构，并采取可靠的泵房与车行通道结构连接设计方案，最终实现了非常规的先浅后深、先附属后主体的基坑工程建设。支护结构设计方案充分考虑了两期支护共用，变形控制，衔接破除等影响因素，保证了箱涵按期通水及基坑工程的安全，为类似通道与排水箱涵共建基坑支护提供了借鉴与参考。

Abstract:

Combined with a case of foundation pit support project for co-construction of a vehicle passage and drainage box culvert in Wuhan, the surrounding environment, engineering geological conditions, and foundation pit support schemes for co-construction of the standard section, rainwater pump house and fire pump house are explored in detail. By rationally arranging the supporting piles and internal bracing structures, and adopting a reliable design scheme for the connection the pump houses and the vehicle passage, an unconventional foundation pit engineering construction was achieved finally, which started from shallow to deep and from ancillary to main structures. The support structure design scheme fully considers the influencing factors of shared use of the support in two phases, deformation control, connection and demolition to ensure the timely water supply of the box culvert and the safety of the foundation pit project, which provides a reference for the foundation pit support of co-constructing similar vehicle passages and drainage box culverts.