Water loads on subsea tunnel linings are governed by the combined effects of seepage, structural deformation, and the grouting zone. However, these factors are often treated separately in existing analytical studies. In this study, an analytical model is developed for steady-state saturated seepage around a deep-buried subsea tunnel. The surrounding rock, grouting zone, primary lining, and secondary lining are represented as distinct hydraulic zones, with a constant permeability coefficient assigned to each zone. The analytical results are compared with numerical simulations and show good agreement. Parametric analyses indicate that increasing the grouting-zone thickness or decreasing its permeability reduces the water pressure behind the secondary lining and the lining stress. This effect becomes more pronounced at higher allowable drainage rates but gradually diminishes beyond a certain parameter range. Field monitoring in the Zhujiangkou Tunnel further shows a maximum relative error of 6.89% for the water pressure behind the lining, supporting the applicability of the proposed analytical method.
This paper investigates the mechanical characteristics of a multiple‐layered lining shield tunnel structure utilized in the Water Resources Allocation Project of the Pearl River Delta through theoretical analysis and model testing. The multiple‐layered lining structure consists of an exterior precast reinforced concr...
Ramin Asadi, Shi-Min Wang, Chang Liu et al.· Deep Underground Science And...· 0 citations
This paper develops a three-dimensional refined finite-element model for the typical concrete lining of the Dianzhong Water Diversion Project tunnel, investigates the temperature and stress fields of the lining, and systematically analyzes the influences of various temperature-control measures and construction conditio...
Xi Qin, Mei Li, Zhi-Qiang Xie et al.· Modelling· 0 citations
Large deformation is one of the most critical hazards in tunnels excavated under complex geological conditions. It often causes significant economic losses and threatens construction safety. For layered soft rock tunnels subjected to high in situ stress, the deformation and failure mechanisms are largely governed by th...
Rui-Qi Guo, Jun-Qi Lai, Tian-Zhu Ye et al.· Applied Sciences· 0 citations
Anti-flotation stability is a critical concern for shield tunnels constructed in water-rich strata, particularly for twin shield tunnels, where excavation-induced disturbance interacts with groundwater buoyancy. This study investigates the influence of segment thickness on the anti-flotation stability of twin shield tu...
Xuan-Sheng Cheng, Xian-Hui Cao, Zhi-Kai Xiong et al.· Engineering Research Express· 0 citations
Ensuring the anti-floating stability of pipe-tunnel working shafts adjacent to rivers in water-rich soft soil strata is a critical challenge throughout both the construction and long-term operation periods. Current research primarily focuses on conventional anti-floating measures for general underground structures, o...
Xu-Dong Cheng, Xue-Ying Liu, Wen-Jun Hu et al.· Scientific Reports· 0 citations
