青岛地铁隧道施工阶段围岩分级细化方法研究与应用
发布时间：2019-01-02 13:32
【摘要】：随着国民经济的不断腾飞和与城市化进程的不断发展,城市地铁已成为解决城市交通堵塞问题的必然选择。青岛地铁隧道开挖方式主要以浅埋暗挖为主,隧道穿越地层条件呈“上软下硬”土岩组合地层,各类基岩面起伏大,风化岩石的工程性状差异大,地质条件十分复杂。硐室围岩的正确分级是地下工程设计、施工方案制定合理与否的关键,它既是评价硐室围岩稳定性的重要参数,也是硐室支护方案设计和确定针对性施工工艺的重要依据。为更好服务于地铁建设,本文将依托青岛地铁建设工程,结合青岛特有的地层环境,通过数量化理论分析、数值计算和现场实测的方法尝试建立一种适用于城市地铁隧道施工阶段围岩等级细分的系统。主要研究内容和结论如下：(1)施工阶段隧道围岩分级细化标准研究。通过模拟试验对围岩自稳埋深的分析,在一般跨度情况下,对岩体完整程度、岩石坚硬程度两个围岩分级指标值的不同组合进行了数值试验,得到了各种组合情况下不同埋深情况下的自稳程度,对Ⅲ、ⅣV、Ⅴ级岩体围岩进行相应亚级级别的划分,分别划分为2、3、3个亚级。(2)施工阶段隧道围岩亚级分级体系研究。利用数量化理论的研究方法,选取岩石坚硬程度、岩体完整性和地下水状态三类围岩分级指标计算得到了围岩亚级级别判定方程的系数和判定值,通过计算建立了施工阶段隧道围岩亚级细分系统。(3)青岛地铁隧道施工阶段围岩分级系统工程应用研究。利用信息化施工方法进行信息反馈,对正在施工的青岛地铁某暗挖车站成功进行运用,达到了缩短工期与控制变形的信息化施工目的。
[Abstract]:With the rapid development of national economy and urbanization, urban subway has become the inevitable choice to solve the problem of urban traffic jam. The excavation mode of Qingdao subway tunnel is mainly shallow underground excavation. The tunnel crossing conditions are "upper soft and lower hard" soil and rock assemblage strata, all kinds of bedrock face are undulating, the engineering properties of weathered rock are different greatly, and the geological conditions are very complicated. The correct classification of the surrounding rock is the key to the design of underground engineering, and the key to whether the construction scheme is reasonable or not. It is not only an important parameter to evaluate the stability of the surrounding rock of the chamber, but also an important basis for the design of the supporting scheme of the chamber and the determination of the construction technology. In order to better serve the subway construction, this paper will rely on Qingdao subway construction project, combined with the unique stratigraphic environment of Qingdao, through quantitative theoretical analysis. The method of numerical calculation and field measurement attempts to establish a system suitable for subdivision of surrounding rock in the construction stage of urban subway tunnel. The main research contents and conclusions are as follows: (1) study on classification and refinement standard of tunnel surrounding rock in construction stage. Based on the analysis of the self-stable depth of surrounding rock mass by simulation test, the numerical tests are carried out on the different combinations of two classification index values of rock mass integrity and rock hardness under the general span. The degree of self-stability of rock mass with different buried depth is obtained under various assemblages. The rock mass of class 鈪，
本文编号：2398554
[Abstract]:With the rapid development of national economy and urbanization, urban subway has become the inevitable choice to solve the problem of urban traffic jam. The excavation mode of Qingdao subway tunnel is mainly shallow underground excavation. The tunnel crossing conditions are "upper soft and lower hard" soil and rock assemblage strata, all kinds of bedrock face are undulating, the engineering properties of weathered rock are different greatly, and the geological conditions are very complicated. The correct classification of the surrounding rock is the key to the design of underground engineering, and the key to whether the construction scheme is reasonable or not. It is not only an important parameter to evaluate the stability of the surrounding rock of the chamber, but also an important basis for the design of the supporting scheme of the chamber and the determination of the construction technology. In order to better serve the subway construction, this paper will rely on Qingdao subway construction project, combined with the unique stratigraphic environment of Qingdao, through quantitative theoretical analysis. The method of numerical calculation and field measurement attempts to establish a system suitable for subdivision of surrounding rock in the construction stage of urban subway tunnel. The main research contents and conclusions are as follows: (1) study on classification and refinement standard of tunnel surrounding rock in construction stage. Based on the analysis of the self-stable depth of surrounding rock mass by simulation test, the numerical tests are carried out on the different combinations of two classification index values of rock mass integrity and rock hardness under the general span. The degree of self-stability of rock mass with different buried depth is obtained under various assemblages. The rock mass of class 鈪，
本文编号：2398554
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