中国铁道科学2025，Vol.46Issue(5)：173-183,11.DOI:10.3969/j.issn.1001-4632.2025.05.15
振动荷载作用下地下结构上浮模拟试验研究
Simulation Experimental Study of Underground Structures Uplift under Vibration Loads
摘要
Abstract
Based on the influence of train vibration loads and groundwater on subway shield tunnel,a simulation device for testing the buoyancy of underground structure was designed.Simulation experiments were carried out to study the effect of vibration loads on the uplift of underground structures,comprehensively considering the effects of the water table and stratum factors.The results show that if the underground structure is subjected to both vibration loads and groundwater,the groundwater will be the main factor causing the change of the buoyancy on the underground structure,and the change of the water table will have a greater effect,while the vibration loads will aggravate the change magnitude of the buoyancy on the underground structure.Under vibration loads,the better the permeability of the formation at the same buried depth,the less time it takes for the pore water pressure of the formation to enter the stabilization stage.For every 10 cm rise of the water table,the pore water pressure in the sandy pebble,sandy soil,and soft clay strata increases by about 0.80,0.93,and 1.00 kPa,respectively,and the pore water pressure at the bottom of the underground structure also increases with the rise of the water table.After the vibration loads are applied,the maximum cumulative uplift values of the buoyancy test cylinders in the 3 strata increase by 1.88%,5.68%and 67.62%,respectively,compared with those before vibration,and the underground structure is uplifted by the buoyancy of the groundwater as well as by the rebound of the underlying soil layer.The impact of vibration loads and groundwater on the longitudinal deformation of underground structures should not be ignored,so it is recommended that the regular settlement monitoring of relevant underground structures should be conducted,and the monitoring frequency should be increased if necessary.关键词
盾构隧道/地下结构/振动荷载/地下水位/纵向变形/模拟试验Key words
Shield tunnel/Underground structure/Vibration load/Water table/Longitudinal deformation/Simulation experiment分类
交通运输引用本文复制引用
黄大维,陈后宏,李彬鑫,耿大新,何炬..振动荷载作用下地下结构上浮模拟试验研究[J].中国铁道科学,2025,46(5):173-183,11.基金项目
国家自然科学基金资助项目(52378398) （52378398）
江西省主要学科学术和技术带头人领军人才项目(20232BCJ22009) （20232BCJ22009）
江西省自然科学基金资助项目(20242BAB26077) （20242BAB26077）
