Foundation pit supporting construction method suitable for silty clay geological conditions: Fid-Bau Portal

Foundation pit supporting construction method suitable for silty clay geological conditions

GAO QIFAN / ZHANG JUN / WU XIAODONG

The invention provides a foundation pit supporting construction method suitable for silty clay geological conditions, and relates to the technical field of foundation pit construction. The foundation pit supporting construction method can reduce the supporting construction difficulty and construction cost under the silty clay geological conditions. The foundation pit supporting construction method suitable for the silty clay geological condition comprises the steps that supporting piles of a foundation pit are constructed, the supporting piles are fixed in a built-in mode, and a pile jumping method is adopted during construction; after construction of the supporting piles of the foundation pit is completed, pile heads of the supporting piles are broken, and a top beam is constructed; a construction foundation pit is excavated; after the foundation pit is excavated, a foundation pit bottom plate is constructed; and after construction of the foundation pit bottom plate is completed, a shear wall reinforcement cage is arranged on the inner side of the supporting pile and connected with the supporting pile through connecting ribs, then concrete of the shear wall is poured, and an integrated structure that the shear wall and the supporting pile are overlapped together is formed. The construction cost of foundation pit supporting under the silty clay geological condition is saved.

本发明是提供一种可降低粉质粘土地质条件下支护施工难度和施工成本的适用于粉质粘土地质条件的基坑支护施工方法，涉及基坑施工技术领域。适用于粉质粘土地质条件的基坑支护施工方法，包括施工基坑的支护桩，其中，所述支护桩采用嵌固的方式固定，且在施工时采用跳桩法施工；待基坑的支护桩施工完成后，破除支护桩的桩头，施工冠梁；开挖施工基坑；待基坑开挖完成后，施工基坑底板；待基坑底板施工完成后，在支护桩的内侧设置剪力墙钢筋笼，并将剪力墙钢筋笼通过连接筋与支护桩连接，再浇注剪力墙的混凝土，形成剪力墙与支护桩叠合在一起的一体化结构。本发明节约了粉质粘土地质条件下基坑支护的施工成本。

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