Slope deformation characteristics with disturbance induced by shallowly-buried large-diameter shield tunnelling

被引：0
|
作者：
He J. [1 ]
Xi X. [2 ]
Liao S. [1 ]
Wang R. [2 ]
Sun J. [2 ]
机构：
[1] Department of Underground Architecture and Engineering, Tongji University, Shanghai
[2] Tengda Construction Group Co. Ltd., Shanghai
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2023年 / 54卷 / 03期
基金：
中国国家自然科学基金;
关键词：
ground deformation; large diameter shield; numerical modelling; parametric study; slope;
D O I：
10.11817/j.issn.1672-7207.2023.03.017
中图分类号：
学科分类号：
摘要：
In this paper, research was conducted based on the Zhijiang Road water pipe gallery and road upgrading project to investigate the slope deformation characteristics with disturbance induced by shallowly-buried large-diameter shield tunnelling. Firstly, a numerical model was built up and verified by the fired measurement of surface settlement induced by the tunnelling. Secondly, by combining numerical calculation with theoretical analysis, deformation mechanism of the slope was revealed. Finally, the influences law of different factors on the slope deformation was further explored through the calculations of refined models. The results show that the surface settlement in region without slope is symmetrical "W-shaped". With the eccentric surcharge from slope, the ground settlement presents distinct asymmetry, and the slope bottom settlement on the left side of the North Line tunnel is significantly larger than that of the ground surface settlement on the right side. Besides sinking, the retaining wall of the slope translates and tilts toward the side away from slope when being undercrossed by shield. With the combining effect of the retaining wall lateral displacement and tunnelling, the slope top settlement is different from that induced by regular shield tunnelling, its overall settlement presents a triangular distribution and its maximum value appears near the retaining wall. The deformation of slope is positively related to ground loss ratio and slope height, and negatively related to covered depth and relative horizontal distance of the tunnel. © 2023 Central South University of Technology. All rights reserved.
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页码：998 / 1011
页数：13
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