Complex foundation pit supporting construction process: Fid-Bau Portal

Complex foundation pit supporting construction process

JIANG HANGSEN / WANG JIAN

The invention relates to the technical field of foundation pit supporting, in particular to a complex foundation pit supporting construction technology which comprises the following steps that steel sheet piles are constructed, Larsen steel sheet piles are inserted in a vibration hammering mode, the Larsen steel sheet piles are tightly buckled, and it is guaranteed that the Larsen steel sheet piles are smoothly closed; crown beam construction is conducted, specifically, crown beams are fixed to the inner sides of the inserted and driven Larsen steel sheet piles; supporting piles are constructed, each supporting pile comprises a main beam and a length adjusting beam arranged at at least one end of the main beam, the supporting piles are hoisted between the top beams, and the overall length of the supporting piles is adjusted through the length adjusting beams till the supporting piles can fully support the top beams; the overall length of the support pile is shortened by adjusting the length adjusting beam, and dismantling of the support pile is completed; top beams are dismantled; and pulling the steel sheet pile. According to the complex foundation pit supporting construction technology, supporting of the complex foundation pit can be effectively dealt with, later pile dismounting is facilitated, and the use reliability is improved.

本申请涉及基坑支护技术领域，尤其涉及一种复杂基坑支护施工工艺，该复杂基坑支护施工工艺包括以下步骤：钢板桩施工，将拉森钢板桩通过振动捶打的方式完成插打，拉森钢板桩之间密扣且保证拉森钢板桩顺利合拢；冠梁施工，将冠梁固定在插打完成的拉森钢板桩内侧；支护桩施工，支护桩包括主梁以及设置于主梁至少一端的长度调节梁，将支护桩吊装至冠梁之间，通过长度调节梁调节支护桩的整体长度，直至支护桩可以对冠梁充分支撑；支护桩拆装，调节长度调节梁缩短支护桩的整体长度，完成支护桩的拆除；冠梁拆除；钢板桩拔桩。该复杂基坑支护施工工艺可以有效应对复杂基坑的支护，而且方便进行后期的拆桩，提高使用可靠性。

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