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隧道建设(中英文) ›› 2020, Vol. 40 ›› Issue (3): 426-434.DOI: 10.3973/j.issn.2096-4498.2020.03.016

• 施工技术 • 上一篇    下一篇

孟加拉卡纳普里河水下隧道大直径泥水盾构钢套筒始发关键技术研究

何 源1, 2, 杨 钊1, 3, 4, 杨 擎1, 3, 4, 钟 涵1, 2, 3, 4,∗, 吴诗琦1, 3, 4   

  1. (1. 中交第二航务工程局有限公司, 湖北 武汉 430040; 2. 中交第二航务工程局第三工程有限公司, 江苏 镇江 212021; 3. 交通运输行业交通基础设施智能制造技术研发中心, 湖北 武汉 430040; 4. 长大桥梁建设施工技术交通行业重点实验室, 湖北 武汉 430040)
  • 收稿日期:2019-08-24 出版日期:2020-03-20 发布日期:2020-04-09
  • 作者简介:何源(1986—),男,辽宁盘锦人,2009 年毕业于西安交通大学,隧道与地下工程专业,本科,工程师,主要从事隧道及地下结构工作。 E-mail: 530497710@ qq. com。?通信作者: 钟涵, E-mail: zhonghancug@ 163. com。

Key Technologies for Steel Sleeve Launching of Large-diameter Slurry Shield Used in Karnaphuli River-crossing Tunnel in Bengladesh

HE Yuan1, 2, YANG Zhao1, 3, 4, YANG Qing1, 3, 4, ZHONG Han1, 2, 3, 4,∗,WU Shiqi1, 3, 4   

  1. (1. CCCC Second Harbour Engineering Co., Ltd., Wuhan 430040, Hubei, China; 2. The 3rd Engineering Co., Ltd. of CCCC Second Harbour Engineering Co., Ltd., Zhenjiang 212021, Jiangsu, China; 3. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan 430074, Hubei, China; 4. Key Laboratory of Large-span Bridge Construction Technology, Wuhan 430074, Hubei, China)
  • Received:2019-08-24 Online:2020-03-20 Published:2020-04-09

摘要: 孟加拉卡纳普里河水下隧道工程具有近海域、大潮差、大坡度、大直径、穿越富水粉细砂地层等特点,盾构始发涌水、涌砂风险 极高。为有效减小盾构始发穿越富水砂层的突涌问题,采用大直径气垫式泥水加压平衡盾构设备,从加固松软地层、切断地下水来 源和减轻突涌后果3 方面入手,提出三重管旋喷桩加固技术、降水技术和大直径钢套筒始发技术。大直径钢套筒始发技术包括大 直径钢套筒及支撑体系设计与安装技术、大型钢套筒及反力架变形监测技术、钢套筒内始发泥水建仓技术。钢套筒密封代替常规 帘布橡胶洞门密封装置,变局部密封为整体密封,大幅度降低了盾构进入富水粉细砂层时洞门涌水、涌砂的风险,提高了盾构始发 的安全性。

关键词: 水下隧道, 大直径泥水盾构, 钢套筒, 盾构始发, 监测

Abstract: The Karnaphuli River-crossing Tunnel project in Bangladesh has the characteristics of nearby sea area, spring tide difference, large slope, large diameter and crossing through water-rich sandy stratum. The risk of water and sand gushing is very high. Hence, to solve the water and sand gushing problem during shield launching, the large-diameter air cushion type slurry pressure balanced shield is adopted. The reinforcement technology of triple-pipe jet grouting pile, dewatering technology and large-diameter steel sleeve launching technology are put forward from the aspects of strengthening the soft stratum, cutting off the source of groundwater and reducing the consequence of water and sand gushing. The large-diameter steel sleeve launching technology includes large-diameter steel sleeve and support system design and installation technology, large steel sleeve and reaction frame deformation monitoring technology and technology of establishing slurry chamber in steel sleeve. The conventional curtain rubber hole sealing device is replaced by steel sleeve seal, and the partial seal is changed into the whole seal, which greatly reduces the risk of water and sand gushing in the hole in water-rich sandy stratum and improves the safety of shield launching.

Key words: river-crossing tunnel, large-diameter slurry shield, steel sleeve, shield launching, monitoring

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