Application of TRD cement-soil wall in deep excavations in Wuhan area
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摘要: 武汉地区深基坑落底式止水帷幕目前主要采用地下连续墙直接施工至基岩的方式。受地下连续墙施工工艺及垂直度控制等因素的影响,该方式往往不同程度的存在渗漏水现象,且造价相对较高。本文通过武汉长江航运中心大厦深基坑工程设计实例,初步研究了TRD水泥土搅拌墙作为落底式止水帷幕在武汉地区一级阶地土层中的施工可行性、成墙质量及渗透性情况。经过技术方案对比,采用TRD水泥土墙落底式止水帷幕,止水效果好,可先行施工,缩短了基坑支护结构施工工期,且较地下连续墙落底经济,为武汉地区落底式止水帷幕的设计提供一种新思路。Abstract: The form of waterproof curtain wall in deep foundation construction in Wuhan primarily adopts the diaphragm wall directly seated onto the bedrock. However, leakage always occurs in the construction of diaphragm walls owing to their perpendicularity. Meanwhile, the cost is much higher. The case study concerning the building of Wuhan Yangtze River Shipping Center is introduced. As a waterproof technique the constructability of this technique is investigated including the quality control and seepage of the wall. Through comparison, the TRD technique has sound waterproof properties, which can be constructed in advance. Meanwhile, this technique can reduce the project construction period significantly and more economic than diaphragm wall. This case study can be an option in waterproof technique in construction of deep excavations.
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Keywords:
- TRD cement-soil wall /
- deep excavation /
- Wuhan area
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