微型桩桩顶与基础相连的支护方法在紧邻建筑物基坑中的应用

Application of Retaining Method by Micro-pile Top Connected with Foundation in the Foundation Pit Adjacent to Buildings

紧邻建筑物的基坑因空间十分狭小,支护难度很大。结合天津一个基坑工程,介绍了一种微型桩桩顶与基础相连的支护方法。工程实践表明,该方法能够有效控制支护结构水平位移,保证支护结构安全,减小对紧邻基坑的建筑物的影响,降低基坑支护造价,施工便捷,对紧邻建筑物的基坑工程具有一定的借鉴意义。

For being adjacent to buildings, the retaining is very difficult in narrow foundation space.Based on a foundation pit engineering in Tianjin, this paper introduces a retaining method, by which the micro-pile top is connected with the foun-dation.The engineering practice shows that the construction is convenient and the horizontal displacement of supporting structure can be effectively controlled to ensure the safety of supporting structure, reduce the influence to the adjacent building and reduce the cost of foundation pit.