Deep foundation pit supporting and reinforcing structure and construction method: Fid-Bau Portal

Deep foundation pit supporting and reinforcing structure and construction method

CHI YING

The invention provides a deep foundation pit supporting and reinforcing structure and a construction method, and belongs to the field of foundation pit construction. The supporting structure comprises a plurality of first supporting piles and second supporting piles, the first supporting piles are arranged in a linear lap joint mode to form a plate body, the plate body is located on the outer side of a foundation pit and all located below a soil layer, and the second supporting piles are arranged at intervals and attached to the side wall of the foundation pit. The upper portions of the second supporting piles are located above the pit bottom of the foundation pit, and the lower portions of the second supporting piles are located below the pit bottom of the foundation pit. A plurality of transverse reinforcing columns are arranged in the second supporting piles, the transverse reinforcing columns are movably arranged in the second supporting piles, and the transverse reinforcing columns are squeezed to move to the outer portions of the second supporting piles and prick into the soil layer. The supporting pile has the advantages that the problem that an existing supporting pile is prone to deformation when the depth of a foundation pit is large can be solved, and reliable supporting and reinforcing effects on the side wall of the foundation pit are guaranteed.

本申请提供了一种深基坑支护加固结构及施工方法，基坑施工领域。其包括若干第一支护桩和第二支护桩，若干所述第一支护桩呈一字型搭接排列呈板体，所述板体位于基坑的外侧且全部位于土层的下方，若干所述第二支护桩间隔排列，所述第二支护桩与所述基坑的侧壁贴合，所述第二支护桩的上部位于基坑的坑底上方，所述第二支护桩的下部位于基坑的坑底下方；所述第二支护桩内设有若干横向加固柱，所述横向加固柱活动设于第二支护桩内，所述横向加固柱受到挤压后移动至第二支护桩的外部并扎入到土层内。本申请具有能够改善现有的支护桩在基坑深度较大时容易产生变形，确保对基坑侧壁进行可靠支护与加固的效果。

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