化学腐蚀下裂隙岩石的损伤效应及断裂准则研究  

Damage effect and fracture criterion of rock with multi-preexisting cracks under chemical erosion

作　　者：丁梧秀[1,2] 冯夏庭[1,3] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110004 [2]洛阳理工学院土木工程系,河南洛阳471023 [3]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071

出　　处：《岩土工程学报》2009年第6期899-904,共6页Chinese Journal of Geotechnical Engineering

基　　金：国家重点基础研究发展规划(973计划)(2002CB412708);国家自然科学基金项目(10472130)

摘　　要：对不同化学溶液腐蚀的岩石试件试验结果的分析表明,化学溶液腐蚀作用下,矿物颗粒间联结受到扰动,同时颗粒受到溶蚀等作用,使岩石强度显著下降,岩石结构产生损伤。因此,化学溶液对岩石材料的腐蚀影响可以归结为岩石颗粒骨架部分性质的劣化和空隙的增大两部分。对于裂隙岩体来说,化学溶液的腐蚀则主要体现在断裂应力的减小和裂隙的增大。从这两个主要影响因素出发,引入应力放大系数,建立了化学腐蚀下裂纹体的断裂准则。给出了考虑化学溶液作用的裂隙岩石断裂准则的研究思路。Through the analysis of strength, meso-structure and crack coalescence mode of rock corroded by different chemical solutions, the corrosive and damage charateristics of rock strength, meso-structure and crack coalescence mode are studied. It is known that the material properties of rock skeleton part are worse and the void ratio increases when the rock specimen with multi-preexisting cracks is corroded by chemical solutions. For fracture rock, the fracture stress will be reduced and the crack length will increase under the chemical corrosion. The fracure criterion of rock, with multi-preexisting cracks under the chemical corrosion is proposed considering the reduction of fracture stress and the increment of crack length caused by chemical damage.

关 键 词：化学腐蚀 断裂准则:空隙 岩石骨架 

分 类 号：TU452[建筑科学—岩土工程]