用户名: 密码: 验证码:
城市轨道交通围岩分级细化的必要性和可行性
详细信息    查看官网全文
摘要
城市轨道交通一般埋深较浅,在勘察过程中受环境条件、地质条件影响较大,近地表遇到的地质环境条件较复杂,实践过程中会遇到对围岩等级划分不清晰的问题。文章详细阐明了围岩分级细化的必要性后,尝试将基本质量指标(BQ)的概念引入到轨道交通围岩分级中,对岩体围岩等级进行细化;同时尝试将土体的基本性质与地下水情况相结合,对土体围岩等级进行细化。并创造性的将围岩垂直压力影响范围引入到围岩分级中来,对垂直压力影响范围的不同级别围岩进行加权平均,得出综合围岩等级,另外举例说明了隧道的不同部位穿过不同地层时的围岩分级细化。最后阐述了城市轨道交通围岩分级细化的意义。
urban rail transit generally shallow depth,in the process of prospecting are greatly influenced by environmental conditions,geological conditions,met in the near surface geological environment condition is more complex,encountered in the process of practice to the problem of surrounding rock of hierarchy is not clear,The article elaborated the necessity of the surrounding rock classification refinement,try to basic concept of quality indicator(BQ) is introduced into orbit transportation in the classification of surrounding rock,to refine the rock mass surrounding rock grade;at the same time try to combining the basic nature of soil and groundwater conditions,to refine soil surrounding rock gradeo and the creative will affect the range of vertical pressure of surrounding rock is introduced into the classification of surrounding rock,influence on the vertical pressure range of different levels of surrounding rock,weighted average,it is concluded that comprehensive level of surrounding rock,Also illustrates the different parts of the tunnel through the different strata of rock mass classification refinement。 Finally discussed the significance of urban rail transit surrounding rock classification refinement.
引文
[1]杨新安/吴德康.铁路隧道[M].上海:同济大学出版社,2003.
    [2]中华人民共和国水利部.GB50218—2014工程岩体分级标准[S].北京:中国计划出版社,2015.
    [3]中华人民共和国铁道部.TB10003—2005铁路隧道设计规范[S].北京:中国铁道出版社,2005.
    [4]北京市规划委员会.GB 50307—2012城市轨道交通岩土工程勘察规范[S].北京:中国计划出版社,2012
    [5]铁道部第一勘测设计院.铁道工程地质手册[M].北京:中国铁道出版社,1980.
    [6]王明年,刘大刚,刘彪等,公路隧道岩质围岩亚级分级方法研究[J].岩土工程学报,2009.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700