重庆南山隧道对涂山湖跨线桥的影响研究及安全评估

发布时间：2018-01-09 23:32

本文关键词：重庆南山隧道对涂山湖跨线桥的影响研究及安全评估　出处：《重庆交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：自我国建国以来,经济迅猛发展的同时,各城市大幅增长的车流和人流已经与相对狭小的城市工件产生了不可调和的矛盾。因此,我们在城市高速路的设计中,为了满足行车速度的要求,就需要架设许多的公路桥涵和隧道。特别是在山区,桥隧的架设对提升城市快速路的服务水平有着举足轻重的作用。本文以南山隧道开挖为工程依托,工作重点为:①南山隧道穿越富水区时,建立隧道,溶洞,桥墩的三维有限元模型,对开挖导致的桥墩下部的溶洞内水压力改变对上覆桥墩影响进行数值模拟,对比与实测数值与规范标准,确定水压力是否是影响桥墩沉降的主要因素,并进一步确定结构是否安全;②南山隧道进行爆破施工时,有限元模拟和实测数据分析爆破对桥墩柱的影响,对比规范,评定结构是否安全;通过本文对南山隧道的理论与大量宝贵的监测数据的研究,针对隧道设计和施工的不同阶段,得出了相应的结论:①设计阶段,在水资源丰富的碳酸盐地域,需按最不利因素进行布载,对溶洞内的水压力释放进行数值模拟,确保既有构筑物的安全。②在隧道施工穿越富水层时,光面爆破按照三米的进度,深埋隧道的爆破震动是不会对地表既有构筑物产生本质的影响,震速位移都在规范范围内,结构安全。
[Abstract]:Since the founding of our country, the rapid development of economy at the same time, the large increase of traffic and passenger flow of cities has produced irreconcilable contradiction with the relatively narrow urban workpiece. Therefore, we are in the design of urban highway. In order to meet the requirements of driving speed, it is necessary to set up many highway bridges and tunnels, especially in mountain areas. The erection of bridge and tunnel plays an important role in improving the service level of urban expressway. Based on the excavation of Nanshan Tunnel, this paper focuses on the establishment of tunnels and caves when the South Mountain Tunnel crosses the water-rich area. The three-dimensional finite element model of the pier is used to simulate the influence of the water pressure change in the cavern of the lower part of the pier on the overlying pier, and the comparison with the measured value and the standard of the code is carried out. Determine whether the water pressure is the main factor affecting the settlement of the pier, and further determine whether the structure is safe or not; 2in the blasting construction of Nanshan tunnel, finite element simulation and measured data are used to analyze the influence of blasting on the pier column, and compare the specifications to evaluate whether the structure is safe or not; Based on the study of the theory of Nanshan Tunnel and a lot of valuable monitoring data, the paper draws the corresponding conclusion in the carbonate area of abundant water resources in the design and construction stages of the tunnel. It is necessary to carry out numerical simulation of water pressure release in the cave according to the most disadvantageous factors to ensure the safety of the existing structure .2 when the tunnel construction passes through the water-rich layer the smooth blasting is carried out according to the schedule of three meters. The blasting vibration of the deep buried tunnel will not have any essential influence on the existing structures on the ground, and the displacement of seismic velocity is within the range of specifications, and the structure is safe.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U456.3

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