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隧道建设(中英文) ›› 2020, Vol. 40 ›› Issue (S2): 233-240.DOI: 10.3973/j.issn.2096-4498.2020.S2.030

• 施工技术 • 上一篇    下一篇

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1, 张文新2, *, 牛占威1, 彭琪3, 向义雄1, 李云涛4, 高广义2   

  1. 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)

  • 出版日期:2020-12-31 发布日期:2021-03-22

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

RAN Haijun1, ZHANG Wenxin2, *, NIU Zhanwei1,PENG Qi3, XIANG Yixiong1, LI Yuntao4, GAO Guangyi2   

  1. (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:2020-12-31 Published:2021-03-22

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

Abstract: To reduce the construction risk of superlarge diameter slurry shield in muddy coast crossing diaphragm wall to reach reception shaft, a singlelayer fiberglass mesh is set on surface of diaphragm against soil of shield reception shaft of the Suai channel, and the design, manufacturing, and hoisting process of the singlelayer fiberglass mesh are optimized. The difference between shield reception through diaphragm with singlelayer 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 singlelayer 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 singlelayer fiberglass mesh for diaphragm wall directly crossed by shield ensures the reception safety of superlarge 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 singlelayer 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