重庆轨道交通工程岩质围岩分级方法研究

发布时间：2019-03-25 17:02

【摘要】：围岩分级是地下工程设计、施工的重要基础,在工程建设中发挥了越来越大的作用。调研了国内常用的4部国标、2部行标的围岩分级方法,归纳了不同围岩分级方法的特点与共同点,指出了不同分级方法用于重庆轨道交通工程存在的不足,如分级的工程对象缺乏针对性、定性划分与定量指标不够协调、没有考虑工程因素中跨度的影响。针对重庆地区岩石强度低、完整性好的地质特征,将定性划分与定量指标合理的综合,同时考虑重庆轨道交通建设中区间隧道与车站隧道跨度差异大的工程特点,建议按跨度设置亚级,提出科学合理的围岩分级方法。结合工程实例验证本文分级方法的实用性与先进性,旨在安全的前提下,降低重庆第二轮轨道交通项目的建设费用。
[Abstract]:The classification of surrounding rock is an important foundation of underground engineering design and construction, which plays a more and more important role in engineering construction. This paper investigates the classification methods of surrounding rock of four national standards and two leading standards in China, sums up the characteristics and common points of different classification methods of surrounding rocks, and points out the shortcomings of different classification methods used in Chongqing rail transit engineering. Such as the lack of targeted classification of engineering objects, qualitative classification and quantitative indicators are not sufficiently coordinated, not taking into account the impact of the span in the engineering factors. In view of the geological characteristics of low rock strength and good integrity in Chongqing area, the qualitative division and quantitative index are reasonably integrated, and the engineering characteristics of large span difference between interval tunnel and station tunnel in Chongqing rail transit construction are considered. It is suggested that sub-grade should be set according to span and a scientific and reasonable classification method of surrounding rock should be put forward. The practicability and advancement of the classification method are verified by engineering examples. The aim is to reduce the construction cost of the second round rail transit project in Chongqing on the premise of safety.
【作者单位】：后勤工程学院军事土木工程系;重庆市地质灾害防治工程技术研究中心;青岛理工大学理学院;
【分类号】：U452.12

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