A simplified computational method is proposed for the three-dimensional spatial deformation and stress of a subway station caused by double tunnel excavation based on structure-soil interaction. Firstly, an elastic-plastic three-dimensional model of the station is established, and the interaction between the station structure and soil is simplified as soil-structure springs. Secondly, the displacement loads caused by double tunnel construction are applied to the bottom spring boundary of the three-dimensional model of the subway station. Subsequently, the influence of soil displacement on the side walls of the station is applied to the structural boundary in the form of additional loads. The research results show that: The simplified computational model proposed in this study is reasonable and can fully describe the deformation and plastic behavior of the station structure. The Hunt model for double-track tunnels can consider the problem of greater disturbance to the station caused by excavating the tunnel later, and modified spring modulus can consider the problem of station floor detachment caused by excessive soil loss, making the computational results more accurate. The research results provide important theoretical basis for efficiently analyzing the safety and protection of existing stations when double-track tunnels are excavated below.
[1] 张小妹,邓碧,苏栋,等.盾构下穿时既有隧道变形机理及遮帘效应研究[J].地下空间与工程学报,2022,18(增2):760-766.
[2] 许有俊, 孟贞, 李志成, 等. 盾构隧道近距下穿既有地铁车站沉降控制措施研究[J]. 山东农业大学学报(自然科学版), 2018, 49(6): 1044-1050.
[3] Mojtaba N, Daniel D. Interaction between an underground parking and twin tunnels－Case of the Shiraz subway line[J]. Tunnelling and Underground Space Technology, 2020, 95: 103-150.
[4] 张旭,满忠昂,许有俊,等.盾构隧道下穿地下过街通道安全控制案例研究[J].地下空间与工程学报,2022,18(增2):952-957.
[5] 沈俊,晏莉,傅金阳,等.叠线盾构隧道并行下穿燃气管线影响分析[J].地下空间与工程学报,2021,17(增1):449-456.
[6] Liu X, Jiang A, Fang Q, et al. Spatiotemporal deformation of existing pipeline due to new shield tunnelling parallel beneath considering construction process[J]. Applied Sciences, 2022, 12(1): 500.
[7] Luo C, Cheng Y, Bai Z, et al. Study on settlement and deformation of urban viaduct caused by subway station construction under complicated conditions[J]. Advances in Civil Engineering, 2021, 2021(5): 1-16.
[8] Afifipour M, Sharifzadeh M, Shahriar K, et al. Interaction of twin tunnels and shallow foundation at Zand underpass, Shiraz metro, Iran[J]. Tunnelling and Underground Space Technology, 2010, 26(2):356-363.
[9] Zhang Z, Zhang M, Zhao Q. A simplified analysis for deformation behavior of buried pipelines considering disturbance effects of underground excavation in soft clays[J]. Arabian Journal of Geosciences, 2015, 8(10): 7771-7785.
[10] Zhao S, Li X, Li X, et al. Analysis of pipeline deformation caused by shield tunnel excavation that obliquely crosses existing pipelines[J]. Arabian Journal of Geosciences, 2022, 15(3): 168-185.
[11] Liang R, Xia T, Huang M, et al. Simplified analytical method for evaluating the effects of adjacent excavation on shield tunnel considering the shearing effect[J]. Computers and Geotechnics, 2017, 81: 167-187.
[12] Zhang D, Huang Z, Li Z, et al. Analytical solution for the response of an existing tunnel to a new tunnel excavation underneath[J]. Computers and Geotechnics, 2019, 10(8): 197-211.
[13] 魏纲, 王霄, 姜婉青, 等. 盾构隧道施工引起建筑物沉降的实用预测方法[J]. 科技通报, 2018, 34(6): 148-153, 158.
[14] Li X G, Wang T, Yang Y. An investigation into the tunnel-soil-pipeline interaction by in situ measured settlements of the pipelines[J]. Advances in Civil Engineering, 2020, 2020(1): 1-18.
[15] 程霖, 杨成永, 马文辉, 等. 地铁隧道开挖引起的管线变形计算与试验研究[J]. 华中科技大学学报(自然科学版), 2022, 50(4): 7-13.
[16] 朱琳. 黄土地区地裂缝对综合管廊的危害性研究[D]. 西安: 西安理工大学, 2018.
[17] Shi J, Zhang X, Chen L, et al. Numerical investigation of pipeline responses to tunneling induced ground settlements in clay[J]. Soil Mechanics and Foundation Engineering, 2017, 54(5): 303-309.
[18] Lin C, Huang M, Nadim F, et al. Tunnelling induced response of buried pipelines and their effects on ground settlements[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 2020, 96: 103-193.
[19] Liu X, Jiang J, Hai L, et al. Study on soil gap formation beneath existing underground structures due to new excavation below[J]. Computers and Geotechnics, 2021, 139: 104-379.
[20] Fu D, Deng B, Yang M, et al. Analytical solution of overlying pipe deformation caused by tunnel excavation based on Pasternak foundation model[J]. Scientific reports, 2023, 13(1): 921-933.
[21] Moorak S. Simple parametric analysis of the response of buried pipelines to micro tunneling induced ground settlements[J]. Journal of the Korean Geo Environmental Society, 2014, 15(11): 29-42.
[22] 邓博团, 田江涛, 苏三庆, 等. 地裂缝作用下管廊结构底部脱空范围计算方法[J]. 西安建筑科技大学学报(自然科学版), 2021, 53(2): 173-177.
[23] 许利惟, 刘旭, 陈福全. 塌陷作用下埋地悬空管道的力学响应分析[J]. 工程力学, 2018, 35(12): 212-219.
[24] 杨成永, 董烨, 程霖, 等. 穿越施工中管线与土层共同变形规律分析[J]. 铁道工程学报, 2020, 37(1): 93-100.
[25] Schütz R, Potts D,Zdravkovi' C L. Advanced constitutive modelling of shotcrete: Model formulation and calibration[J]. Computers and Geotechnics, 2011, 38(6): 834-845.
[26] Loganathan N, Poulos H G, Stewart D P. Centrifuge model testing of tunnelling-induced ground and pile deformations[J]. Géotechnique, 2000, 50(3): 283-294.
[27] Peck R. Deep excavations and tunnelling in soft ground[A] // 7th International Conference on Soil Mechanics and Foundation Engineering [C]. Mexico, 1969: 225-290.
[28] Yu J, Zhang C, Huang M. Soil pipe interaction due to tunnelling: Assessment of Winkler modulus for underground pipelines[J]. Computers and Geotechnics, 2013, 50: 17-28.
[29] 中国建筑科学研究院. 建筑桩基技术规范(JGJ 94-2008 )[S]. 北京: 中国建筑工业出版社, 2008.
[30] Mair R. Centrifuge modelling of tunnel construction in softclay[D]. Cambridge University, 1979.
[31] Hunt D. Predicting the settlements above twin tunnels constructed in soft ground[J]. Tunnelling and Underground Space Technology incorporating Trenchless Technology Research, 2004, 19(4): 378-388.
[32] 住房和城乡建设部. 城市轨道交通工程监测技术规范(GB 50911-2013)[S]. 北京: 中国建筑工业出版社, 2013.
[33] 住房和城乡建设部. 混凝土结构设计规范(GB 50010-2010)[S]. 北京: 中国建筑工业出版社, 2010.
