大东湖核心区污水传输支隧工程顶管施工关键技术研究与应用

孙庆; 冯文强; 王志云; 朱晓冬; 李永峰; 杨圣虎

doi:10.3973/j.issn.2096-4498.2021.07.016

隧道建设 >

2021 , Vol. 41 >Issue 7: 1218 - 1224

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.07.016

施工技术

大东湖核心区污水传输支隧工程顶管施工关键技术研究与应用

孙庆 ,
冯文强 ,
王志云 ,
朱晓冬 ,
李永峰 ,
杨圣虎

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（1. 中建三局工程技术研究院，湖北武汉 430000； 2. 武汉大学，湖北武汉 430000； 3. 中建三局安装工程有限公司，湖北武汉 430000）

孙庆（1981—），男，吉林舒兰人，2011年毕业于同济大学，岩土工程专业，博士，高级工程师，现从事深基坑、桩基础、隧道施工装备、隧道施工技术相关方面的研究工作。E-mail： 15631838@qq.com。

网络出版日期: 2021-07-29

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Key Construction Techniques for Pipe Jacking in Branches of Sewage Tunnels in Dadong Lake Core Area

SUN Qing ,
FENG Wenqiang ,
WANG Zhiyun ,
ZHU Xiaodong ,
LI Yongfeng ,
YANG Shenghu

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(1. Engineering Technology Research Institute of China Construction Third Engineering Bureau Group Co., Ltd., Wuhan 430000, Hubei, China; 2. Wuhan University, Wuhan 430000, Hubei, China; 3. China Construction Third Engineering Bureau Installation Engineering Co., Ltd., Wuhan 430000, Hubei, China)

Online published: 2021-07-29

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摘要

为解决超深长距离曲线双管岩石顶管项目中顶进距离长、小净距曲线顶进、地质复杂等难点问题，采用适应性设计的刀盘及盾体、双极纠偏、智能化控制系统等顶管机研发技术，采用自动导向测量系统和膏浆技术、分段注浆等注浆减阻技术，采用高效的泥浆系统、严格的泥水作业管理等施工技术。结果表明： 1）该种泥水平衡式顶管机满足长距离曲线顶管施工，采用智能化控制系统使设备操作及项目管理更为便捷； 2）高压膏浆减阻配合常规触变泥浆分段注浆对顶管进行减阻，可有效减小顶管摩阻力，经计算实际顶力仅为理论顶力的60%左右； 3）采用自动导向系统满足连续小角度、小范围的纠偏，可确保顶管机顺利出洞； 4）高效的泥浆系统、严格的泥水作业管理可有效克服复杂地层、小净距双管带来的困难。

关键词： 泥水平衡顶管机; 超深长距离顶进; 岩石顶管; 曲线双管; 自动导向; 注浆减阻; 泥浆循环

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孙庆 , 冯文强 , 王志云 , 朱晓冬 , 李永峰 , 杨圣虎 . 大东湖核心区污水传输支隧工程顶管施工关键技术研究与应用[J]. 隧道建设, 2021 , 41(7) : 1218 -1224 . DOI: 10.3973/j.issn.2096-4498.2021.07.016

Abstract

To achieve curved jacking with a small clear span and long distance in a complex geology, pipejacking techniques, including speciallydesigned cutterhead and main machine, bipolar deviation adjusting and intelligent control system, as well as automatic guiding system, drag reduction using pasteslurry technology and sectional grouting, efficient slurry system, and strict slurry operation management are applied. Following results are obtained: (1) The slurry balance pipejacking machine can meet the requirements of longdistance and curved pipejacking construction, and the intelligent control system is convenient for equipment operation and project management. (2) The pipejacking friction is effectively reduced by combining highpressure paste slurry and the conventional sectional grouting of thixotropic slurry, and the actual jacking force is approximately 60% of the theoretical jacking force. (3) The automatic guiding system can achieve deviation adjustment with a small angle and range, thus ensuring successful pipe jacking. (4) The efficient slurry system and strict slurry operation management effectively overcome difficulties caused by a complex geology and small clear distance doublepipe jacking.

Key words： slurry balance pipe jacking machine; super ; deep and long ; distance pipe jacking; pipe jacking in rock; curved double pipe; automatic guiding; drag reduction by grouting; slurry circulation

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