湖南大学学报（自然科学版）2024，Vol.51Issue(5)：68-75,8.DOI:10.16339/j.cnki.hdxbzkb.2024048
盾构下穿引起上覆管线变形的简化计算方法
Simplified Calculated Method for Pipeline Deformation Induced by Shield Tunneling
摘要
Abstract
Tunnel excavation can easily cause settlement and deformation of the surface of the overlying surface,which will further cause the stress and deformation response of the existing pipeline.Based on this,a simplified method for calculating the deformation of the overlying pipeline due to shield excavation is proposed.Firstly,the Loganathan formula is selected to solve the additional stress along the pipeline induced by tunneling underlying,and the pipeline is further simplified into an infinitely long beam resting on the Pasternak foundation.The influence of the lateral displacement of the infinite distal soil on the existing pipeline is introduced.Then,the mechanical equilibrium method is used to obtain the control equation of the vertical force and deformation of the pipeline.The finite difference method is selected to obtain the numerical analytical solution of the pipeline deformation and internal force analysis.The case analysis shows that,compared with the degradation analysis of this method,the calculation results are closer to the measured data of an actual project in the existing literature,which verifies the reliability of this method.Further parameter studies show that increasing the vertical clearance between the tunnel and the pipeline causes a nonlinear reduction in the stress and deformation of the pipeline.Increasing the volume loss rate results in a linear increase in the deformation and inner force of the pipeline.Increasing the pipeline bending stiffness reduces the pipeline deformation but greatly increases the pipeline bending moment.关键词
管-土相互作用/Pasternak地基/侧向土体影响/简化计算方法Key words
pipeline-soil interaction/Pasternak foundation/lateral soil effect/simplified calculated method分类
交通工程引用本文复制引用
冯国辉,肖明清,倪建中,郑茗旺,李雨杰,刘冠水,李强,徐长节..盾构下穿引起上覆管线变形的简化计算方法[J].湖南大学学报（自然科学版）,2024,51(5):68-75,8.基金项目
国家重点研发计划资助项目(2023YFC30094008),National Key R&D Program of China(2023YFC30094008) （2023YFC30094008）
国家自然科学基金资助项目(U1934208,52238009,52008373,51878276),National Natural Science Foundation of China(U1934208,52238009,52008373,51878276) （U1934208,52238009,52008373,51878276）
国家杰出青年科学基金资助项目(51725802),National Science Fund for Distinguished Young Scholars(51725802) （51725802）
江西省自然科学基金资助项目(20223BBG71018),Natural Science Foundation of Jiangxi Province(20223BBG71018) （20223BBG71018）
浙江大学平衡建筑研究中心配套资金资助项目(20203512-10C),Centre for Balance Architecture of Zhejiang University(20203512-10C) （20203512-10C）
南昌轨道交通集团科研项目(2019HGKYB002),Nanchang Rail Transit Group Research(2019HGKYB002) （2019HGKYB002）
