吉林大学学报(地球科学版) ›› 2016, Vol. 46 ›› Issue (5): 1458-1465.doi: 10.13278/j.cnki.jjuese.201605201
潘建立1,2
Pan Jianli1,2
摘要:
顶管施工技术已经广泛用于给排水管道和小直径隧道工程中,同时其施工扰动引起的土体变形问题也越来越受到重视。顶管施工引起周围土体变形的主要因素有:刀盘正面附加推力、顶管机及后续管道与土体之间的摩阻力、注浆压力和土体损失。针对上述影响因素,分析各影响因素单独作用产生的土体变形,然后叠加得出土体总变形计算公式,最后结合港珠澳大桥珠海连接线工程中0#试验管的工程实例分析了其适用性。工程实例分析结果表明:土体损失、注浆压力和顶管机与土体间摩阻力产生的最大土体变形分别为-8.000、2.500和±2.020 mm,这三者是引起土体变形的主要因素;而正面附加推力和后续管道与土体摩阻力产生的最大变形量分别为±0.075和±0.230 mm,影响程度不显著。与Peck公式对比,本文公式除了在最大沉降值处偏差较大以外,其他位置土体变形比Peck公式更接近实测值。
中图分类号:
[1] 付延玲,金玮泽,陈兴贤,等.高层建筑荷载引发地面沉降与隆起变形三维数值模拟[J].吉林大学学报(地球科学版),2014,44(5):1587-1594. Fu Yanling, Jin Weize, Chen Xingxian, et al. Three-Dimensional Numerical Simulation of Land Subsidence and Upheaval Deformation Caused by High-Rise Building Load[J]. Journal of Jilin University (Earth Science Edition), 2014, 44(5):1587-1594.[2] Peck R B. Deep Excavations and Tunneling in Soft Ground[C]//Proceeding of 7th International Conference on Soil Mechanics and Foundation Enginee-ring. Mexico City:Sociedad Mexicana de Mecanica de Suelos, 1969:225-290.[3] Attewell P B, Woodman J P. Predicting the Dynamics of Ground Settlement and Its Derivatives Caused by Tunneling in Soil[J]. Ground Engineering, 1982, 15(8):13-20, 36.[4] Loganathan N, Poulos H G. Analytical Prediction for Tunneling-Induced Ground Movement in Clays[J]. Journal of Geotechnical and Geoenvironmental Enginee-ring, 1998, 124(9):846-856.[5] Sagaseta C. Analysis of Undrained Soil Deformation due to Ground Loss[J]. Geotechnique, 1987, 37(3):301-320.[6] Verruijt A, Booker J R. Surface Settlements due to Deformation of a Tunnel in an Elastic Half Plane[J]. Geotechnique, 1996, 46(4):753-756.[7] 施成华,黄林冲.顶管施工隧道扰动区土体变形计算[J].中南大学学报(自然科学版),2005,36(2):323-328. Shi Chenghua, Huang Linchong. Calculation of Soil Deformation in Area of Disturbance due to Pipe-Jacking Construction[J]. Journal of Central South University (Science and Technology), 2005, 36(2):323-328.[8] 黄宏伟,胡昕.顶管施工力学效应的数值模拟分析[J].岩石力学与工程学报,2003,22(3):400-406. Huang Hongwei, Hu Xin. 3D Numerical Analysis of Construction Mechanics Effect of Pipe-Jacking[J]. Chinese Journal of Rock Mechanics and Engineering, 2003, 22(3):400-406.[9] 冯海宁,龚晓南,徐日庆.顶管施工环境影响的有限元计算分析[J].岩石力学与工程学报,2004,23(7):1155-1162. Feng Haining, Gong Xiaonan, Xu Riqing. Finite Element Analysis of Influence of Pipe-Jacking Construction on Environments[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(7):1158-1162.[10] 魏纲. 顶管工程土与结构的性状及理论研究[D]. 杭州:浙江大学, 2005. Wei Gang. Theoretical Study on Behavior of Soil and Structure During Pipe Jacking Construction[D]. Hangzhou:Zhejiang University,2005.[11] 李方楠,沈水龙,罗春泳. 考虑注浆压力的顶管施工引起土体变形计算方法[J]. 岩土力学,2012,33(1):204-208. Li Fangnan, Shen Shuilong, Luo Chunyong. Prediction Approach of Ground Deformation Induced by Pipe Jacking Construction Considering Grouting Pressure[J]. Rock and Soil Mechanics, 2012, 33(1):204-208. |
[1] | 卫凌云,秦胜伍,陈慧娥. 基坑开挖对单桩及群桩回弹位移的影响分析[J]. 吉林大学学报(地球科学版), 2014, 44(2): 584-590. |
[2] | 沈世伟, 佴磊, 徐燕. 准等时距QGM(1|1)模型分段预测法及其在草炭土路基沉降预测中的应用[J]. J4, 2011, 41(4): 1098-1103. |
[3] | 石少敏. 动力法计算振冲碎石桩桩体压缩模量[J]. J4, 2011, 41(1): 172-176. |
|