倒挂井壁法在煤矿深基坑中的应用

The Application of Inverted Side-wall in Deep Foundation Excavation in Coal Mine

针对梁北矿矸石翻车机房基坑深度大、施工空间小、距离其他结构近、安全程度要求高等困难,借鉴竖井井筒施工经验,采用倒挂井壁法进行基坑的开挖和围护,使基坑围护结构及翻车机房承重结构合为一体,节省了临时支护设施,减少了施工工序,降低了工程成本。施工全过程中的地面沉降观测结果显示,基坑围护效果良好。

According to the difficulties of the foundation excavation with large depth, small construction space, close distance and high safety requirements in Liangbei mine, the method of inverted side-wall to excavate and maintain the foundation excavation was put forward using vertical shaft construction experience as reference. This method made maintain structure and load-bearing structure together, which saved temporary support facilities, reduced the construction process and reduced the cost of the project. The observations of land subsidence in the whole construction process show that the effect of maintenance excavation is good.