复杂地质条件下大断面隧道施工过程优化及研究

发布时间：2018-04-10 13:57

本文选题：大断面隧道 + 围岩变形　；参考：《河南工业大学》2015年硕士论文

【摘要】：随着社会科学技术的不断发展,我国隧道建设的步伐逐渐加大,相继建设了一大批大断面隧道。大断面隧道与中、小断面隧道相比其稳定性更差,建设难度更大,采用传统隧道建设方法建设大断面隧道会产生施工进度缓慢、安全经济效益差等问题,已经不能满足现今大断面隧道施工建设的要求。因此,对大断面隧道施工过程力学规律进行研究,对其施工工法进行优化,寻找出一种快速、安全、经济的施工方法,对大断面隧道的建设具有重要的意义。本文根据郑州市中原路西延线韩门隧道为现场依托,围绕大断面隧道施工过程优化展开工作。本文研究工作如下:1、利用ABAQUS软件进行有支护条件下的大断面隧道开挖数值模拟,分析韩门隧道洞口段不同台阶高度下和洞身加宽段双侧壁导坑法与CD法施工下隧道开挖过程中围岩的力学特性。2、深入了解新奥法的施工方法及其原理,在相关围岩监测点埋设电阻式应变片、钢筋应力应变计等监控设备来监测现场数据,根据现场监测所得数据对隧道施工过程中围岩所产生的变形进行深入分析,用以指导施工。3、通过有限元软件模拟分析得到隧道施工过程中围岩的受力特性,结合韩门隧道现场监测数据的分析结果,对模拟结果和监测结果进行分析比较,分析总结大断面隧道的基本受力特征,研究确定隧道施工采用不同施工方法优选问题。
[Abstract]:With the continuous development of social science and technology, the pace of tunnel construction in China has gradually increased, and a large number of large section tunnels have been built one after another.Compared with medium and large section tunnel, the large section tunnel is less stable and more difficult to build. Using the traditional tunnel construction method to construct the large section tunnel will bring some problems, such as slow construction progress, poor safety and economic benefit, etc.It can not meet the requirements of large section tunnel construction.Therefore, it is of great significance for the construction of large section tunnel to study the mechanics law of the construction process, optimize the construction method and find out a fast, safe and economical construction method.Based on the Hanmen Tunnel of Zhongyuan Road West extension Line in Zhengzhou City, this paper focuses on the optimization of the construction process of the large-section tunnel.The research work of this paper is as follows: 1. The numerical simulation of large section tunnel excavation under the condition of support is carried out by using ABAQUS software.This paper analyzes the mechanical characteristics of surrounding rock in the excavation process of Hanmen tunnel under different height of step and widening section of tunnel body under the method of double sidewall guide pit and CD method, and deeply understands the construction method and principle of the new Austrian method.Monitoring equipment such as resistance strain gauge and steel bar stress strain gauge are embedded in the monitoring points of surrounding rock to monitor the field data. According to the monitoring data, the deformation of surrounding rock in the tunnel construction process is deeply analyzed.In order to guide the construction. 3, through the finite element software simulation analysis to obtain the surrounding rock stress characteristics in the tunnel construction process, combined with the Hanmen tunnel site monitoring data analysis results, the simulation results and monitoring results are analyzed and compared.This paper analyzes and summarizes the basic stress characteristics of large section tunnel, and studies and determines the optimal selection of tunnel construction methods.
【学位授予单位】：河南工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.4

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