土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (1): 65-69.

• 专题论述 • 上一篇    下一篇

过江盾构隧道施工渗流场与位移场数值模拟及控制措施

刘海锋1，董邦所1，祝金龙2   

  1. (1.中铁四局集团有限公司，合肥 230023；2.合肥工业大学土木与水利工程学院，合肥 230009）
  • 收稿日期:2021-08-15 修回日期:2021-08-28 出版日期:2022-02-28 发布日期:2022-03-09
  • 作者简介:刘海锋（1987-），男，工程师，研究方向为城市轨道交通工程施工。

Numerical Simulation and Control Measures of Seepage Field and Displacement Field of a Shielded River Crossing Tunnel

LIU Haifeng1, DONG Bangsuo1, ZHU Jinlong2   

  1. (1.China Tiesiju Civil Engineering Group, Hefei 230023;
    2.College of Civil Engineering, Hefei University of Technology, Hefei 230009)
  • Received:2021-08-15 Revised:2021-08-28 Online:2022-02-28 Published:2022-03-09

摘要： 基于杭州过江盾构隧道工程项目，建立江底盾构隧道施工的三维数值模型，基于流固耦合原理进行计算分析了水下隧道周围的渗流场及位移场的变化规律，渗流场以隧道为中心在1倍的洞径范围内呈漏洞状分布，河床沉降值在双线隧道中间偏右的位置叠加达到最大值，对盾构掘进实际参数变化规律进行了探索，盾构推力、注浆压力及土仓压力之间具有一定的相关性，提出江底盾构施工的控制措施，研究结果可为水下盾构隧道施工质量控制及监测提供参考。

关键词: 隧道, 流固耦合, 数值模拟, 掘进参数, 控制措施

Abstract: Based on the engineering practice of a river-crossing tunnel of the Hangzhou, a three-dimensional numerical model for the excavation of the shield tunnel at the bottom of the river was established. Based on principles of the fluid-solid coupling, the seepage field and the displacement field around the underwater tunnel were predicted and evaluated. The seepage field was distributed in a loophole shape within one time the diameter of the tunnel, and the maximum settlement value of the riverbed was on the right side of the double-lane tunnel. The actual variation of the monitored parameters during the excavation was explored, and there was a certain correlation among the shield thrust, the grouting pressure and the soil pressure. Finally, the control measures for the construction of the shielded tunnel at the bottom of the river were proposed.

Key words: tunnel, fluid-solid coupling, numerical simulation, tunnel excavation parameters, control measures

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