摘要
为研究断层及断层影响带参数对地基变形和倒虹吸结构的影响,以滇中引水工程曲江倒虹吸段为依托,采用FLAC3D软件建立考虑地形变化的二维模型,进行断层及断层影响带参数的正交试验研究。结果表明:逆冲错动模式下,断层对倒虹吸结构地基地表变形的影响大于断层影响带;走滑错动模式下,断层对地基地表变形的影响小于断层影响带;组合错动模式下,断层影响带对地基地表变形的影响大于断层。断层天然容重、泊松比、弹性模量,以及断层影响带内摩擦角、泊松比、弹性模量对倒虹吸钢管变形的影响较大。逆冲错动模式下,随以上参数的变化,钢管最大位移可达0.428 m。走滑错动模式下,钢管最大位移可达1.053 m。组合错动模式下,钢管最大位移可达1.085 m。在地表倒虹吸结构设计过程中,需要根据不同错动模式,对影响倒虹吸钢管变形较大的参数进行取值。
To study the influence of faults and fault influence zone parameters on foundation deformation and inverted siphon structure,based on the Qujiang inverted siphon section of the Dianzhong Water Diversion Project,a two-dimensional model considering terrain changes was established with FLAC3D software,and orthogonal experimental studies were conducted on the parameters of faults and fault influence zones.The research results are as follows.In the thrust dislocation mode,the influence of faults on the surface deformation of the inverted siphon structure foundation is greater than that of the fault influence zone.Under the strike slip dislocation mode,the influence of faults on the deformation of the foundation surface is smaller than that of the fault influence zone.Under the combined dislocation mode,the fault influence zone has a greater impact on the surface deformation of the foundation than the fault.The natural unit weight,Poisson′s ratio,elastic modulus of the fault,as well as the friction angle,Poisson′s ratio,and elastic modulus within the fault influence zone,have a significant impact on the deformation of the inverted siphon steel pipe.Under the reverse thrust movement mode,with the change of the above parameters,the maximum displacement of the steel pipe can reach 0.428 m.In the strike slip mode,the maximum displacement of the steel pipe can reach 1.053 m.In the combined dislocation mode,the maximum displacement of the steel pipe can reach 1.085 m.In the process of designing the surface inverted siphon structure,it is necessary to take values for the six parameters that have a significant impact on the deformation of the inverted siphon steel pipe based on different dislocation modes.
作者
刘汉东
赵亚文
杨长林
徐红超
李冬冬
LIU Handong;ZHAO Yawen;YANG Changlin;XU Hongchao;LI Dongdong(North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Yunnan Dianzhong Water Diversion Engineering Co.,Ltd.,Kunming 650000,China)
出处
《华北水利水电大学学报（自然科学版）》
北大核心
2023年第3期81-88,共8页
Journal of North China University of Water Resources and Electric Power：Natural Science Edition
基金
国家自然科学基金项目(51309100)
云南省重大科技专项计划项目(202102AF080001)。
关键词
物理力学参数
地形影响
活断层
倒虹吸结构变形
地基变形
physical and mechanical parameters
terrain influence
active fault
inverted siphon structure deformation
foundation deformation
