超硬地层下地下连续墙关键施工技术

摘要:

超硬地层是基坑支护施工中常见的复杂工况之一。依托恒大中心项目对超硬地层区域地下连续墙关键施工技术进行分析研究，探讨超硬地层中地下连续墙施工的质量控制技术，确定了单槽五个引孔的引孔方式，旋挖钻、成槽机以及铣槽机三种机械配合的成槽施工工艺，并给出了部分针对于类似工程的施工建议。结果表明，提出的单槽五个引孔的引孔方式以及旋-抓-铣的施工工艺具有良好的可行性。

Abstract:

Superhard stratum is one of the common complex working conditions in foundation pit support construction. Relying on the project of Evergrande Center to analyze and study the key construction technology of the underground diaphragm wall in the ultra-hard stratum area, discuss the quality control technology of the underground diaphragm wall construction in the ultra-hard stratum, determine the lead-in method of five lead-in holes in a single slot, and the rotary drilling , groove forming machine and groove milling machine three kinds of mechanical cooperation groove forming construction technology, and give some construction suggestions for similar projects. The results show that the proposed method of single-slot five-lead holes and the construction technology of rotating-grabbing-milling have good feasibility.