紧邻河道的深基坑围护防渗结构设计与施工

为探索在大型桥梁桩基工程施工中确定合理的基坑围护方案,以104国道微山潘家渡大桥深基坑防渗支护为例,对多头水泥搅拌桩墙防渗支护并结合钻孔注浆法防渗等进行研究,对本方案的制定、优化及施工工艺流程进行详细介绍,希望对类似工程施工提供参考借鉴.通过本组合方案的应用,证明水泥搅拌桩墙结合钻孔注浆起到了良好的支护和防渗作用,达到了安全、节省、高效的预期目标.

Surrounding Protection Anti-Seepage Structural Design and Construction in the Deep Hole Excavated for Building Foundation Close to the River Course

In order to explore and determine the reasonable surrounding protection plan for the hole excavated for building foundation in the large-scale bridge pile foundation project construction,this article conducts the applicable research on the multi-thread cement agitation pile wall anti-seepage and the drill hole note thick liquid anti-seepage,with the anti-seepage supports in the deep hole excavated for building foundation of the 104 National Highway Weishan Panjiadu Bridge as an example.It also presents in details the formulation and optimization of this plan,and the construction technical process so as to provide reference for the similar project constructions.The application of the joint plan has proven that the cement agitation pile wall along with the drill hole note thick liquid plays a good role in the support and anti-seepage and has reached the anticipated target for safety,economy and high effectiveness.