浅埋隧道下穿高层建筑稳定性及相互影响研究
发布时间：2019-01-17 07:28
【摘要】：本文以青岛地铁M3号线青岛火车站至大学路区间隧道下穿山东出入境检疫局高层建筑为工程背景，根据勘察报告及建筑物资料收集成果，将建筑物、隧道和岩土体看成一个整体，利用ABAQUS有限元数值分析，，结合强度折减法和现场实测数据，以强度和变形为双重控制指标，对隧道施工过程中隧道自身及建筑物安全稳定性进行了相关探讨，对地表沉降、洞室收敛、围岩稳定性评估方法、建筑结构位移控制标准等核心问题进行了深入分析。本文主要的研究工作如下： (1)探讨屈服准则对强度折减安全系数的影响，与仅考虑剪切屈服的Mohr-Coulomb准则相比，修正后考虑张拉屈服的Mohr-Coulomb准则对剪切屈服和张拉屈服的岩土材料都具有普遍的适用性。 (2)利用ABAQUS程序建立有限元模型，基于围岩压力、基底压力和支护阻力共同作用分析的数值模拟方法，分析隧道开挖对地表沉降和洞室变形的影响规律，并引入安全系数概念对隧道围岩及初衬稳定性进行评判。利用有限元强度折减法，给出了不同下穿方案和基于不同衬砌性质的围岩安全系数，并对其稳定性规律进行了分析；运用有限元数值模拟计算衬砌的内力，再根据《公路隧道设计规范》计算衬砌安全系数，依此来评价土岩条件下隧道支护参数设计的合理性。 (3)将建筑物自重下的变形值和隧道开挖完成后建筑物发生的变形值之和不大于建筑规范允许值作为地铁近邻建筑物位移控制指标，对高层建筑上部结构和下部基础变形分析，计算结果均满足位移控制标准；对建筑结构内力进行分析，并对梁柱构件进行承载力验算，计算结果也满足规范要求。 (4)对现场监测数据整理分析，探讨掌子面的稳定性与地表沉降之间的联系，分析支护结构变形情况，分析开挖步对建筑物和地表沉降的影响，判断隧道自身及建筑物的稳定性趋势。
[Abstract]:In this paper, under the tunnel between Qingdao Railway Station and University Road of Qingdao Metro Line M3, the high-rise building of Shandong Entry-Exit Inspection Bureau is taken as the engineering background. According to the survey report and the data collected from the building, the building is built. The tunnel and the rock and soil are regarded as a whole. By using the ABAQUS finite element numerical analysis, combined with the strength reduction method and the field measured data, the strength and deformation are taken as the double control indexes. This paper discusses the safety and stability of the tunnel itself and the building during the tunnel construction, and analyzes the core problems such as the ground subsidence, the convergence of the cavern, the evaluation method of the surrounding rock stability, the control standard of the displacement of the building structure and so on. The main work of this paper is as follows: (1) the influence of yield criterion on the safety factor of strength reduction is discussed, compared with the Mohr-Coulomb criterion which only considers shear yield. The modified Mohr-Coulomb criterion, which considers tensile yield, is generally applicable to both shear and tensile yielding geotechnical materials. (2) the finite element model is established by ABAQUS program. Based on the numerical simulation method of surrounding rock pressure, basement pressure and support resistance, the influence of tunnel excavation on ground subsidence and cavity deformation is analyzed. The concept of safety factor is introduced to evaluate the stability of surrounding rock and initial lining of tunnel. By using the finite element strength reduction method, the safety factors of surrounding rock based on different underpass schemes and different lining properties are given, and its stability law is analyzed. The internal force of lining is calculated by using finite element numerical simulation, and then the safety factor of lining is calculated according to the Design Code of Highway Tunnel, and the rationality of tunnel support parameter design under the condition of soil and rock is evaluated. (3) the sum of the deformation value under the weight of the building and the deformation value of the building after the tunnel excavation is not greater than the allowable value of the building code is taken as the displacement control index of the building near the subway. For the deformation analysis of the superstructure and the lower foundation of the high-rise building, the calculated results meet the displacement control standard. The internal force of building structure is analyzed and the bearing capacity of Liang Zhu member is checked. (4) analyze the monitoring data, discuss the relation between the stability of the face and the surface settlement, analyze the deformation of the supporting structure, and analyze the influence of the excavation step on the building and the surface settlement. Judge the stability trend of tunnel itself and buildings.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U451;TU973
本文编号：2409764
[Abstract]:In this paper, under the tunnel between Qingdao Railway Station and University Road of Qingdao Metro Line M3, the high-rise building of Shandong Entry-Exit Inspection Bureau is taken as the engineering background. According to the survey report and the data collected from the building, the building is built. The tunnel and the rock and soil are regarded as a whole. By using the ABAQUS finite element numerical analysis, combined with the strength reduction method and the field measured data, the strength and deformation are taken as the double control indexes. This paper discusses the safety and stability of the tunnel itself and the building during the tunnel construction, and analyzes the core problems such as the ground subsidence, the convergence of the cavern, the evaluation method of the surrounding rock stability, the control standard of the displacement of the building structure and so on. The main work of this paper is as follows: (1) the influence of yield criterion on the safety factor of strength reduction is discussed, compared with the Mohr-Coulomb criterion which only considers shear yield. The modified Mohr-Coulomb criterion, which considers tensile yield, is generally applicable to both shear and tensile yielding geotechnical materials. (2) the finite element model is established by ABAQUS program. Based on the numerical simulation method of surrounding rock pressure, basement pressure and support resistance, the influence of tunnel excavation on ground subsidence and cavity deformation is analyzed. The concept of safety factor is introduced to evaluate the stability of surrounding rock and initial lining of tunnel. By using the finite element strength reduction method, the safety factors of surrounding rock based on different underpass schemes and different lining properties are given, and its stability law is analyzed. The internal force of lining is calculated by using finite element numerical simulation, and then the safety factor of lining is calculated according to the Design Code of Highway Tunnel, and the rationality of tunnel support parameter design under the condition of soil and rock is evaluated. (3) the sum of the deformation value under the weight of the building and the deformation value of the building after the tunnel excavation is not greater than the allowable value of the building code is taken as the displacement control index of the building near the subway. For the deformation analysis of the superstructure and the lower foundation of the high-rise building, the calculated results meet the displacement control standard. The internal force of building structure is analyzed and the bearing capacity of Liang Zhu member is checked. (4) analyze the monitoring data, discuss the relation between the stability of the face and the surface settlement, analyze the deformation of the supporting structure, and analyze the influence of the excavation step on the building and the surface settlement. Judge the stability trend of tunnel itself and buildings.
【学位授予单位】：青岛理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U451;TU973
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