Research and Practice of Full Plugging Groundwater Technology in Water-Rich TBM Diversion Tunnel

• DOI: 10.1007/s12205-023-2468-8
• Publication Date: 2023-11-22T08:02:32Z
• Authors: Lichuan Wang; Shuai Zhang; Zongqing Zhou; Jian Wu; Tao Bai; Yunjuan Chen; Jingbo Zhao; Shuo Xu
• Keywords: Hydraulic head

To solve the problem of water discharge in tunnel when passes through low-pressure water-rich fractured stratum, grouting plugging technology is studied. The scheme optimized field test. post-validation research numerically simulated and parameters complete sealing ring are analyzed. results show that: 1) Full can effectively improve funnel effect precipitation with good effect. With decrease permeability coefficient increase thickness ring, flow velocity around both decreased significantly, a trend "rapidly decreasing-slowly decreasing". Considering various factors, an optimal between 1.5 m 2.5 reasonable range for 2.07 × 10−6 cm/s 4.14 considered appropriate. 2) use cement-water glass system full plugging, significantly reduce water, only partial dripping or even state. Using polyurethane foam single point method to systematically block changes path hardly attenuates discharge.