酸雨对岩石力学特性劣化影响研究  

Study on the effect of acid rain on the deterioration of rock mechanical properties

作　　者：王雨昕 WANG Yuxin(China Railway 12 Group Construction and Installation Engineering Co.,Ltd.,Taiyuan 030024,China;China Railway 12 Bureau Group Co.,Ltd.,Taiyuan 030024,China;Taiyuan University of Technology,Taiyuan 030600,China)

机构地区：[1]中铁12局集团建筑安装工程有限责任公司,山西太原030024 [2]中铁12局集团有限责任公司,山西太原030024 [3]太原理工大学,山西太原030600

出　　处：《四川建材》2024年第8期79-80,90,共3页Sichuan Building Materials

摘　　要：为研究建筑物中岩石材料长期在酸性土壤侵蚀条件下其力学特性劣化的影响,通过对侵蚀一定时间后的岩石进行力学单轴压缩试验、声发射检测试验以及CT扫描试验,系统分析酸性土壤对混凝土力学特性的劣化影响。试验结果表明:在酸性土壤的影响下,试件单轴压缩应力应变曲线的初始压密阶段随着腐蚀时间的增加而延长,声发射计数在试件初始压密阶段大幅度提高,试件的力学抗压强度随着酸雨侵蚀时间增加而不断降低。经酸雨侵蚀后岩石的孔裂隙发育明显,孔隙度较未经酸雨侵蚀的岩石大幅提高。该研究对酸性环境影响地区的工程建设有着非常重要的指导意义。In order to study the influence of the deterioration of mechanical properties of rock materials in buildings under the condition of long-term acid soil erosion,this paper conducts mechanical uniaxial compression test,acoustic emission detection test and CT scanning experiment on the rock after a certain period of erosion,and systematically analyzes the influence of acid soil on the deterioration of mechanical properties of concrete.The test results show that,under the influence of acid soil,the initial compaction stage of uniaxial compression stress-strain curve of specimens extends with the increase of corrosion time,the acoustic emission count increases greatly at the initial compaction stage,and the mechanical compressive strength of specimens decreases with the increase of acid rain erosion time.After acid rain erosion,the pore and fissure development of rock is obvious,and the porosity of rock is significantly higher than that of rock without acid rain erosion.This study has very important guiding significance for engineering construction in acid environment affected area.

关 键 词：单轴压缩 声发射 力学劣化 

分 类 号：P512[天文地球—地质学]