厚粉黏土层中盾构掘进诱发地层变形响应因素影响
李亮1陆勇1范存新1郭兵2朱文轩3
Influence Factors of Strata Deformation Response Induced by Shield Tunneling in Thick Silty Clay Layer
LI Liang1LU Yong1FAN Cunxin1GUO Bing2ZHU Wenxuan3
-
作者信息:1.苏州科技大学土木工程学院， 215011， 苏州
2.中铁十六局集团北京轨道交通工程建设有限公司， 100018， 北京
3.上海交通大学船舶海洋与建筑工程学院， 200240， 上海
-
Affiliation:1.School of Civil Engineering, Suzhou University of Science and Technology, 215011, Suzhou, China
2.China Railway 16th Bureau Group Beijing Metro Engineering Construction Co., Ltd., 100018, Beijing, China
3.School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiao Tong University, 200240, Shanghai, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.05.011
-
中图分类号/CLCN:U455.43
-
栏目/Col:土建工程
摘要:
［目的］厚粉黏土层中，盾构掘进产生的扰动受地层条件及施工参数等多个因素影响，地层变形较为复杂，因此有必要研究地层条件及施工参数对盾构掘进诱发地层变形的影响规律。［方法］以苏州轨道交通11号线某掘进段工程为例，开展饱和土层中盾构掘进的应力-渗流耦合计算，土体力学特性采用考虑孔隙相关性的下负荷面本构模型进行计算，并与实测结果进行对比分析。分析盾构掘进过程中地层条件（土体渗透系数）及施工参数（掌子面压力、掘进速度）对地层变形的影响，并进行因素敏感性分析。［结果及结论］采用下负荷面本构模型的应力-渗流耦合计算，能够很好地再现盾构掘进诱发的地层变形响应；掌子面压力及掘进速度的增大会使得地面总沉降量减小，而土体渗透系数越大会使得地面总沉降量增大；盾构掘进诱发地层变形的各影响因素敏感性依次为：掌子面压力敏感性>土体渗透系数敏感性>掘进速度敏感性。
Abstracts:
［Objective］In thick silty clay layers, the disturbance caused by shield tunneling is affected by multiple factors such as strata conditions and construction parameters. Given the complexity of strata deformation, it is necessary to study the influence law of strata conditions and construction parameters on shield tunneling induced strata deformation. ［Method］Taking a tunneling section of Suzhou Rail Transit Line 11 as an example, the stress-seepage coupling calculation of shield tunneling in saturated soil is carried out. Soil mechanical properties are calculated using the lower load surface constitutive model capable of considering pore correlation. Calculation results are analyzed and compared with the measured results. The influence of formation conditions (soil permeability coefficient) and construction parameters (face pressure, tunneling speed) on strata deformation during shield tunneling is analyzed, together with the factors sensitivity. ［Result & Conclusion］Adopting the stress-seepage coupling calculation of the lower load surface constitutive model can well reproduce strata deformation response induced by shield tunneling; the increase of face pressure and tunneling speed will reduce the total ground settlement, while the greater the soil permeability coefficient, the greater the total land subsidence. The sensitivity of each influencing factor for strata deformation induced by shield tunneling is in the following order: face pressure sensitivity>soil permeability sensitivity>tunneling speed sensitivity.
过刊浏览
资料下载
友情链接