文献类型：期刊文献

英文题名：Ground Deformation of Shield Tunneling through Composite Strata in Coastal Areas

作者：Wu, Xiong[1];Xu, Jiangbo[1];Wang, Shaowei[1];Sha, Peng[2];Han, Zemin[1];Chen, Xinyu[1];Shu, Sheng[1];Qiao, Wei[1];Zeng, Xianglong[1]

机构：[1]Changan Univ, Sch Highway, Xian 710064, Peoples R China;[2]Shaoxing Univ, Coll Civil Engn, Shaoxing 312000, Peoples R China

年份：2024

卷号：14

期号：5

外文期刊名：BUILDINGS

收录：SCI-EXPANDED(收录号：WOS:001233078100001)、、EI(收录号：20242216185748)、Scopus(收录号：2-s2.0-85194497082)、WOS

基金：No Statement Available

语种：英文

外文关键词：coastal areas; upper soft and lower hard strata; shield tunneling; construction parameters; ground deformation

外文摘要：In order to mitigate ground deformation during shield construction in both upper soft and lower hard strata of coastal areas, a numerical simulation was executed. This simulation assessed surface deformation under varying stratum ratios, grouting pressures, and earth bin pressures. The evaluation was primarily based on the amount of ground deformation, which revealed that hard rock strata offer superior settlement control compared to soft rock strata. The excavation of the right tunnel line increased disturbance to the left line at higher stratum ratios. Surface deformation demonstrated a linear correlation with earth pressure, with 130 kPa identified as the optimal point. Higher pressures resulted in extrusion deformation and ground uplift. Grouting pressure had a minimal impact on stratum deformation over time. The stratum ratio exerted the most significant influence on settlement, followed by earth pressure, with grouting pressure having the least impact. In the context of coastal tunnel construction, hard rock excavation is favored. Earth pressure must be balanced to prevent subsidence or uplift, while excessive grouting pressure does not significantly reduce subsidence. Grouting pressure should ensure the complete filling of voids.