Research on comprehensive analysis and control method of surrounding rock stability in submarine tunnel crossing fault fracture zone by drilling and blasting method
BAI Songsong1，ZHOU Zongqing1，2，GAO Chenglu1，MENG Qingyu3，LIU Jianxun4，GAO Tian5，WANG Xu3，KE Chenglin4
(1. School of Qilu Transportation，Shandong University，Jinan，Shandong 250061，China；2. Research Institute of New Material and Intelligent Equipment，Shandong University(Qihe)，Dezhou，Shandong 251114，China；3. China Railway Design Construction Group Co.，Ltd.，Tianjin 300308，China；4. 1st Engineering Development Co.，Ltd.，China Railway
14th Bureau Group，Rizhao，Shandong 276800，China；5. Shandong CSCEC Urban Development Co.，Ltd.，
Jinan，Shandong 200112，China)
Abstract：The stability control of surrounding rock is crucial when the submarine tunnel passes through poor geological conditions like fault fracture zone. In this paper，a numerical analysis method of surrounding rock stability is proposed，which requires the stability of the surrounding rock in the whole area of the tunnel to be calculated first，and then the refined hazard process of high-risk area is analyzed. Numerical simulation with FLAC3D and DEM methods are carried out respectively based on the F9 fault and weathering trough section of the Shantou Bay Submarine Tunnel Project. The high-risk sections of the tunnel were evaluated. The control effect of different grouting reinforcement area thicknesses on the deformation of the tunnel surrounding rock was compared by simulation. Based on the comparison results，a scheme of joint grouting on the sea surface and inside the tunnel was proposed. The reliability of the proposed scheme was verified through numerical simulations and measurements of Shantou Bay Tunnel. The implementation of the grouting scheme ensured the safety of tunnel construction. The relevant conclusions offer valuable insights for controlling the stability of surrounding rock and optimizing grouting schemes during the construction of submarine tunnels under similar conditions.
白松松1，周宗青1，2，高成路1，孟庆余3，刘建勋4，高 天5，王 旭3，柯成林4. 钻爆法海底隧道穿越断层破碎带围岩稳定性综合分析与控制方法研究[J]. 岩石力学与工程学报, 2025, 44(3): 691-704.
BAI Songsong1，ZHOU Zongqing1，2，GAO Chenglu1，MENG Qingyu3，LIU Jianxun4，GAO Tian5，WANG Xu3，KE Chenglin4. Research on comprehensive analysis and control method of surrounding rock stability in submarine tunnel crossing fault fracture zone by drilling and blasting method. , 2025, 44(3): 691-704.
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