安全与环境工程2025，Vol.32Issue(3)：112-120,9.DOI:10.13578/j.cnki.issn.1671-1556.20240250
重庆红层砂岩水化学损伤特性研究
Damage of red sandstone in Chongqing caused by hydro-chemical processes
摘要
Abstract
Grotto temples are widely distributed in the Sichuan and Chongqing regions of China,and the intensification of water environment pollution in Sichuan and Chongqing area has caused serious corrosion to the rock mass and stone statues in the grottoes.Studying the damage characteristics of sandstone under long-term hydro-chemical effects is of great significance for operation and conservation of rock works and stone artifacts.Taking the Erfosi red bed sandstone in Laitan,Chongqing City as the research object,firstly,triaxial compression tests were conducted on the sandstone in the saturated state and acid corrosion state of pH=3 to analyze the mechanical properties of the sandstone under the action of hydro-chemistry.Then,based on continuous damage mechanics and statistical damage theory,a sandstone damage constitutive model was deduced.Finally,based on the triaxial compression test data,the dissolution of sandstone minerals under the action of hydro-chemistry was analyzed,and a sandstone hydrochemical damage model based on the mineral dissolution amount was established and validated.The test results are as follows:The peak strength and deformation modulus deteriorate the most under the acid corrosion state(pH=3);during loading,the axial and radial strains of the sandstone sample increase significantly,and the radial strain is more sensitive to the degradation of rocks in different hydro-chemical environments;experimental data verify the effectiveness and rationality of the model.This study is of great significance to the operation and protection of rock engineering and stone cultural relics.关键词
岩石劣化/砂岩/力学特性/水化学作用/损伤模型Key words
rock deterioration/sandstone/mechanical property/hydro-chemistry/damage model分类
资源环境引用本文复制引用
李漪,王红伟,彭斌,谭瑞山,曹翊,张明..重庆红层砂岩水化学损伤特性研究[J].安全与环境工程,2025,32(3):112-120,9.基金项目
国家自然科学基金项目(41877265) （41877265）
