单层玻璃纤维筋网在超大直径盾构接收中的应用与分析——以苏埃通道工程盾构隧道为例

冉海军; 张文新; 牛占威; 彭琪; 向义雄; 李云涛; 高广义

doi:10.3973/j.issn.2096-4498.2020.S2.030

隧道建设 >

2020 , Vol. 40 >Issue S2: 233 - 240

DOI: https://doi.org/10.3973/j.issn.2096-4498.2020.S2.030

施工技术

单层玻璃纤维筋网在超大直径盾构接收中的应用与分析——以苏埃通道工程盾构隧道为例

冉海军 ,
张文新 ,
牛占威 ,
彭琪 ,
向义雄 ,
李云涛 ,
高广义

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（1. 中铁隧道局集团有限公司，广东广州 511458； 2. 中铁隧道勘察设计研究院有限公司，广东广州 511458； 3. 中铁隧道集团三处有限公司，广东深圳 518052； 4. 中铁隧道股份有限公司，河南郑州 450001）

网络出版日期: 2021-03-22

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Application and Analysis of Singlelayer Fiberglass Mesh in Reception of Super large Diameter Shield: a Case Study on Shield Tunnel of Su′ai Channel

RAN Haijun ,
ZHANG Wenxin ,
NIU Zhanwei ,
PENG Qi ,
XIANG Yixiong ,
LI Yuntao ,
GAO Guangyi

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(1. China Railway Tunnel Group Co., Ltd., Guangzhou 511458, Guangdong, China; 2. China Railway Tunnel Consultants Co., Ltd., Guangzhou 511458, Guangdong, China; 3. The 3rd Engineering Co., Ltd., China Railway Tunnel Group, Shenzhen 518052, Guangdong, China; 4. China Railway Tunnel Stock Co., Ltd., Zhengzhou 450001, Henan, China)

Online published: 2021-03-22

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摘要

为解决超大直径泥水盾构在临海淤泥地层穿越连续墙到达接收井的施工风险，以苏埃通道工程盾构隧道为背景，在盾构接收井超深连续墙迎土面设置单层玻璃纤维筋网，优化超深连续墙单层玻璃纤维筋网钢筋笼的设计、制作与吊装过程；从施工工艺、风险、工期和费用方面，分析盾构在单层玻璃纤维筋网连续墙到达和普通钢筋网连续墙始发的不同，得出以下结论： 1）超深连续墙采用单层玻璃纤维筋+普通钢筋的组合钢筋笼，分节制作吊装，保证了钢筋笼的稳定性和吊装安全性； 2）盾构接收井连续墙迎土面采用单层玻璃纤维筋网代替普通钢筋网，采用盾构直接切割通过，确保了超大直径泥水盾构到达施工安全； 3）单层玻璃纤维筋网采用机械破除外层钢筋，避免了双层钢筋网连续墙的多次工序转换及人工破除风险高的问题，施工周期缩短60%以上； 4）单层玻璃纤维筋网增强了对地层的支撑作用，有利于缩短接收端地层加固长度，提高效益。

关键词： 超大直径泥水盾构; 盾构接收; 单层玻璃纤维筋网; 超深地下连续墙; 淤泥软土地层

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冉海军 , 张文新 , 牛占威 , 彭琪 , 向义雄 , 李云涛 , 高广义 .

单层玻璃纤维筋网在超大直径盾构接收中的应用与分析——以苏埃通道工程盾构隧道为例

[J]. 隧道建设, 2020 , 40(S2) : 233 -240 . DOI: 10.3973/j.issn.2096-4498.2020.S2.030

Abstract

To reduce the construction risk of superlarge diameter slurry shield in muddy coast crossing diaphragm wall to reach reception shaft, a singlelayer fiberglass mesh is set on surface of diaphragm against soil of shield reception shaft of the Su′ai channel, and the design, manufacturing, and hoisting process of the singlelayer fiberglass mesh are optimized. The difference between shield reception through diaphragm with singlelayer fiberglass mesh and launch through diaphragm with common reinforcement mesh is analyzed from the aspects of construction technology risk, schedule, and cost. The results show the following. (1) The adoption of combined reinforcement cage of singlelayer fiberglass mesh and common reinforcement mesh and segmental manufacturing and hoisting effectively ensure the stability of reinforcement cage and its hoisting safety. (2) The adoption of singlelayer fiberglass mesh for diaphragm wall directly crossed by shield ensures the reception safety of superlarge diameter slurry shield. (3) The external reinforcement cage is broken mechanically, which reduces the risk of artificial application and procedure change and shortens the construction schedule by approximately 60%. (4) The singlelayer fiberglass mesh can enhance the ground support effect of the formation, and reduce the consolidation length of reception end soil, thus improve the construction efficiency.

Key words：

superlarge diameter slurry shield

; shield reception; singlelayer glass fiber mesh; ultradeep underground diaphragm wall; muddy soft soil

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