大跨度中介桩复合对撑在土方开挖施工中的应用

Application of Long Span Intermediate Pile with Composite Paired-support in Earth Excavation Construction

介绍了中介桩复合对撑在土方开挖施工中的技术应用,充分利用土压平衡原理,在开挖方式上通过预留土超大跨度主对撑,借鉴眼镜法对称分区开挖,变多道对撑为单道主对撑,在化整为零的同时增设角撑,兼顾基坑开挖安全和效率。总结的施工经验可供类似施工借鉴。

In earth excavation construction,this paper introduces the technical application of intermediate pile with composite paired-support.In the earth excavation method,through reserving soil for the super long span main paired support,the principle of earth pressure balance is fully utilized.The glass method is borrowed for symmetrical partition excavation,the multi paired supports are changed into single main paired support,while at the same time of making the whole into pieces,the corner supports are added to give full consideration of safe and efficient foundation pit excavation.The construction experience summarized can be used as reference for similar construction.