摘要
根据聚类方法分析了固体表面均匀收缩裂纹的类型及其与柱状节理之间的关系;分析了不同性质岩浆的粘度和结晶时间对柱状节理的影响,并对不同性质岩浆形成柱状节理的难易程度进行了总结;根据岩浆岩柱状节理的形成特征总结了柱状节理特定裂缝形成的主要影响因素,分析了热收缩和物质散失两种因素对裂缝的影响并详细推导了柱状节理岩体裂纹宽度的计算公式,并在此基础上利用泥巴山隧址区的流纹岩柱状节理进行了裂纹宽度的相关验证;模拟和分析了柱状节理岩体的工程力学特性,获得了泥巴山隧址区含柱状节理岩体的构造应力场并进行了相关力学特性分析。
Form of the solid surface uniform shrinkage cracks and its relationship with the columnar joints were studied by the cluster analysis firstly. Influence of magma viscosity with different properties and crystallizing time on columnar joints were analyzed,and its difficulty was got. According to the forming characteristics,the main influence factors of columnar jointed cracks have been summarized. The thermal shrinkage and material loss were mainly considered and calculation formula of columnar jointed cracks width was deduced detailed and we could validate it with the Nibashan tunnel construction project. Engineering mechanical properties of the columnar joint were simulated and analyzed. Local stress field was got with the drilling value and the main formation of the Nibashan tunnel site.
出处
《地下空间与工程学报》
CSCD
北大核心
2016年第S2期481-487,共7页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金(41272321
51178402)
关键词
柱状节理
形成特征
裂纹宽度
模拟分析
columnar joint
formation characteristics
crack width
simulation analysis
