近距离低净空下地下连续墙成槽技术研究和探讨

杜峰

doi:10.3973/j.issn.1672-741X.2015.02.010

隧道建设 >

2015 , Vol. 35 >Issue 2: 160 - 166

DOI: https://doi.org/10.3973/j.issn.1672-741X.2015.02.010

施工技术

近距离低净空下地下连续墙成槽技术研究和探讨

杜峰

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（中国市政工程西北设计研究院有限公司，甘肃兰州 730000）

杜峰（1974—），男，江苏海门人，1997年毕业于同济大学，岩土工程专业，本科，高级工程师，现从事地下工程及隧道的设计工作。

收稿日期: 2014-04-20

修回日期: 2014-09-20

网络出版日期: 2015-02-11

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Study on and Discussion of Cutting of Channels of Underground Diaphragm Wall Close to Existing Buildings in Confined Space

DU Feng

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（CSCEC AECOM Consultants Co., Ltd., Lanzhou 730000, Gansu, China）

Received date: 2014-04-20

Revised date: 2014-09-20

Online published: 2015-02-11

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摘要

以深圳地铁9号线人民南站地下连续墙成槽技术为例，探讨在近距离及低净空作业条件下采用低净空成槽及吊装设备结合钢筋笼分段下放连接的方法，辅以槽段稳定及临近建（构）筑物的保护措施来实施地下连续墙的相关手段，解决在受限空间内实施深基坑作业的技术问题。相关分析及实施结果表明，施工方案是切实可行及安全可靠的。

关键词： 地下连续墙; 低净空成槽; 高架桥; 泥浆比重; 钢筋笼分段; 低净空吊装设备

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杜峰 . 近距离低净空下地下连续墙成槽技术研究和探讨[J]. 隧道建设, 2015 , 35(2) : 160 -166 . DOI: 10.3973/j.issn.1672-741X.2015.02.010

Abstract

The underground diaphragm wall of South People Road Station of No. 9 Line of Shenzhen Metro is located close to existing buildings and below existing viaduct. The channel of the diaphragm wall has to be cut in confined space. Technologies, including channel cutting in confined space, sectioning of rebar cages, rebar cage installing in confined space and existing building protection, are used to guarantee the successful construction of the deep foundation pit in confined space. The analysis and practice show that the mentioned channel cutting technologies adopted for the underground diaphragm wall are feasible, reliable and safe.

Key words： underground diaphragm wall; channel cutting in confined space; viaduct; slurry density; rebar cage sectioning; hoisting equipment in confined space

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