兰州地铁砂卵石地层盾构施工组段划分与控制参数研究

发布时间：2018-04-28 06:25

本文选题：盾构施工 + 组段划分　；参考：《北京交通大学》2015年硕士论文

【摘要】：为了解决日趋恶化的城市道路交通问题,世界各国普遍开始使用立体化快速轨道交通的方式来代替传统的平面交通方式。目前,许多大城市逐渐形成了以地下铁路交通为主,多种轨道交通并存的城市轨道交通体系。其中,占据主体地位的地下铁路交通具有噪音小、速度快、运输量大、污染轻、能耗低等优点。盾构工法在地铁隧道建设中得到了越来越广泛的应用。但是盾构施工过程中存在着大量的风险因素需要控制,例如盾构施工控制参数设置不当引起的地表塌陷,盾构操作不当引起盾构刀具剧烈磨损、崩齿等。这些由于盾构施工过程中施工控制参数设置不当、操作失误或者判断错误所导致的风险随时都有可能发生,必须对盾构施工过程进行有效的安全风险控制、管理,才能有效规避盾构施工过程中的风险,保证盾构施工安全。因此,寻求一种既能够考虑盾构隧道围岩特性,又能考虑到环境风险条件的盾构隧道安全风险组段划分方法,对盾构施工过程的安全风险控制有重要的意义。可以说组段划分是盾构施工过程风险控制的基础,只有确定合理的组段划分理论和方法,才能确定盾构主要施工参数的控制范围,从而有效地规避盾构施工过程中的风险。本文在参考大量文献的基础上,以兰州地铁1号线1期工程盾构区间为工程背景,对砂卵石地层盾构施工掘进参数进行了分析研究。主要工作如下：首先对地勘资料进行整理,通过对地勘报告、工程平面图、地层纵面图等资料的整理、分析,基于盾构隧道穿越的地层特性、地下水位与隧道纵断面的相互关系、盾构隧道覆土厚度、盾构隧道周边环境及其状态等以上几点原则对盾构区间进行组段划分。其次,通过阅读大量文献,了解盾构施工控制参数的影响因素,对盾构施工主要控制参数(土仓压力、刀盘扭矩、推力等)进行理论计算。最后,以工程试验为背景,通过数值模拟以及理论计算对盾构施工控制参数进行优化。
[Abstract]:In order to solve the worsening problem of urban road traffic, three-dimensional rapid rail transit has been widely used in the world to replace the traditional plane traffic. At present, many big cities have gradually formed the urban rail transit system, which is dominated by the mass transit and co-existing with many kinds of rail transit. Among them, mass transit has the advantages of low noise, high speed, large volume of transportation, light pollution, low energy consumption and so on. Shield tunneling method has been applied more and more widely in subway tunnel construction. However, there are a lot of risk factors to be controlled during shield construction, such as surface collapse caused by improper setting of shield construction parameters, severe wear and tear of shield cutting tools due to improper shield tunneling operation, tooth collapse and so on. These risks may occur at any time due to improper setting of construction control parameters, misoperation or misjudgment during shield construction, so effective safety risk control and management must be carried out during shield construction. Only in order to effectively avoid the risks in the shield construction process, to ensure the shield construction safety. Therefore, it is of great significance for the safety risk control of shield tunneling to seek a method that can not only consider the surrounding rock characteristics of shield tunnel, but also take into account the environmental risk conditions. It can be said that section division is the basis of risk control in shield construction process. Only by determining reasonable theory and method of section division can the control range of main construction parameters of shield tunneling be determined and the risk in shield construction process be effectively avoided. Based on a large number of references and taking the first phase shield section of Lanzhou Metro Line 1 as the engineering background, this paper analyzes and studies the tunneling parameters of sand pebble stratum. The main tasks are as follows: First of all, the geological prospecting data are arranged and analyzed through the collation of geological prospecting report, engineering plan, stratum vertical plane, etc., based on the stratigraphic characteristics of shield tunneling, the relationship between underground water level and longitudinal section of tunnel, The section of shield tunnel is divided according to the above principles, such as the overlying soil thickness of shield tunnel, the surrounding environment and its state of shield tunnel. Secondly, through reading a large number of documents, the influence factors of shield construction control parameters are understood, and the main control parameters (earth chamber pressure, cutter head torque, thrust, etc.) are calculated theoretically. Finally, the control parameters of shield construction are optimized by numerical simulation and theoretical calculation.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U455.43

【参考文献】