Shallow foundation building protection structure close to deep foundation pit engineering and construction method: Fid-Bau Portal

Shallow foundation building protection structure close to deep foundation pit engineering and construction method

XU NING / HUANG WENJIE / LI SHUISHENG / DENG YANG / ZHENG DONG

The invention relates to a shallow foundation building protection structure close to deep foundation pit engineering and a construction method. The shallow foundation building protection structure close to the deep foundation pit engineering comprises deep pile foundations close to an original shallow foundation building, the upper ends of the multiple deep pile foundations are connected with a connecting beam, and the connecting beam is connected with a ring beam of the original shallow foundation building; and a soil body between the deep pile foundations and a newly-built deep foundation pit support structure is subjected to grouting reinforcement to form a grouting reinforcement layer, sleeve valve pipes are pre-buried at the bottom of the original shallow foundation building, and meanwhile the working procedure of backward mode first and forward mode second is adopted for deep foundation pit engineering construction. According to the shallow foundation building protection structure close to deep foundation pit engineering and the construction method, disturbance of deep foundation pit engineering to the adjacent original shallow foundation building is greatly reduced through an active and passive protection thought, and the effect of improving the stability of the original shallow foundation building is achieved.

本申请涉及一种紧邻深基坑工程浅基础建筑保护结构及施工方法，其包括紧邻原浅基础建筑设置的深桩基，若干深桩基上端连接有连梁，所述连梁与原浅基础建筑的圈梁相连接；在深桩基与新建深基坑围护结构间的土体进行注浆加固形成注浆加固层，并在原浅基础建筑底部预埋袖阀管，同时深基坑工程施工采用“先逆后顺”的工序。本申请以“主动+被动”防护思路大大减小深基坑工程对紧邻的原浅基础建筑扰动，达到提高原浅基础建筑稳定性的效果。

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