【作者】 于萍萍；

【导师】 贺少辉；

【作者基本信息】 北京交通大学 ， 建筑与土木工程， 2011， 硕士

【摘要】 新京张城际铁路八达岭地下车站是新建京张城际铁路的重点控制工程,对站址区进行围岩稳定性研究,可以为该工程建设提供十分重要的理论依据。本文以新京张城际铁路八达岭地下车站为依托,在总结前人研究成果的基础上,分析了站址区的地形地貌、地层岩性、地质构造等地质背景,基于现场勘查资料和室内外实验成果,对地下站站址区的围岩稳定性展开研究。其相关工作和成果有：(1)综述了当前国内外类似工程概况和围岩稳定性的分析方法,为站址区的围岩稳定性研究提供借鉴和参考。(2)根据现场实验及室内实验结果,分析了站址区岩体的初始应力场及岩石的力学性质；通过现场物探及钻探,指出了站址区岩体的完整程度及地层岩性；通过抽水实验,了解站址区地下水情况。(3)根据资料、现场勘查资料和室内外试验成果,分别采用RMR法和Q法围岩分级方法对站址区围岩进行等级划分。结果表明,站址区围岩的强风化层及全风化层基本属于Ⅳ级,地下车站通过区域基本属于Ⅲ级,其中,侵入岩脉中正长岩脉属于Ⅲ级围岩。(4)运用ABAQUS有限元分析软件模拟了车站硐室开挖施工的过程；对无支护毛洞围岩的应力场特征、位移场特征、塑性破坏区做出了详细剖析,为后期八达岭地下车站支护参数的选取优化等提供理论依据。更多还原

【Abstract】 New Beijing-Zhangjiakou Inter-city railway Badaling underground station is the key controlling engineering of the New Beijing-Zhangjiakou Inter-city Railway; studying the stability of surrounding rock of station site areas, can provide important theory basis for the engineering construction.This paper is based on the New Beijing-Zhangjiakou Inter-city Railway Badaling Underground Station. In summary on the basis of predecessors’ achievements, the thesis analyzed topography and geomorphology, stratigraphic lithology, geological structures of the station site areas. In the basis of gathering on-site investigation information and in-outdoor experiment results, this paper researched on the stability of surrounding rock.The conclusions are as follows:(1)This thesis summarized the domestic and foreign similar project summary and analysis methods of the stability of surrounding rock,and provided reference for the research of the surrounding rock stability of station site areas summarizes.(2) According to the field experiment and indoor experiment results, the thesis analyzes the initial stress field of rock mass and rock mechanical properties; Through the field exploration and drilling, the thesis points out the complete degree and rock stratigraphic lithology; through pumping experiment, the thesis obtains the groundwater condition of the station site areas.(3) Based on the field exploration reports and the in-outdoor experimental results, this thesis uses RMR system and Q system to make a division on the rock of the station site areas. The results show that, the strongly weathered layer and the fully weathered layer of the station site areas belongs toⅣ. The rock of the underground station belongs toⅢbasically. And syenite belongs toⅢbelongs toⅢtoo.(4) This thesis uses ABAQUS to simulate the station cavern excavation process, makes detailed analysis of the characteristics of stress field and displacement field characteristics, plastic damage area for the rock of the no supporting cave, and provides theoretical basis for the better chosen of the later Badaling underground station’s Supporting parameters.更多还原