岩溶围岩力学特性试验的初步研究  

Preliminary Study on Mechanical Property Tests for Karst Rock

作　　者：李苍松[1] 廖烟开[1] 谷婷[1] 

机构地区：[1]中铁西南科学研究院有限公司,成都610031

出　　处：《地下空间与工程学报》2007年第z1期1358-1362,1386,共6页Chinese Journal of Underground Space and Engineering

摘　　要：为了正确认识和处理隧道开挖揭露的不同形态岩溶,提出岩溶围岩的概念,确定岩溶围岩物理力学性质试验项目。以遂渝铁路桐子林隧道内所采取岩石样品为例,开展灰岩的比重、容重、孔隙率和吸水率等物理性质实验,抗压(拉)强度、抗剪强度及变形特性等力学试验,以及声发射、岩相鉴定和扫描电镜实验等。对实验结果进行分析,对电镜试验图片进行分形理论计算及微观物理特征分析,并得到了现场验证。To properly read and treat different kinds of Karst discovered by tunnel constructing,the conception of karst rock is drawn out,and some projects are suggested on mechanical property tests for karst rock.With an ex- ample of rock samples got from Tongzhilin tunnel,Chongqing-Suining railway,some physical tests are proven,such as,specific gravity,bulk density,porosity,and hygroscopic coefficient.Some mechanical tests are given,such as tensile(compression)strength,shear strength and deformation behavior,Aslo,sound emission test,petrographic ananlysis and electron microscopic test are researched.Test effects and micro-physical characters are analysised,e- lectron microscopic pictures are calculated by using fractal theory,which is proved by construction site.

关 键 词：隧道 岩溶围岩 物理力学特性 试验 

分 类 号：U452.1+2[建筑科学—桥梁与隧道工程]