摘要
该文以某工程勘察取得的砂岩为研究对象,采用SD-1式点荷载试验仪对天然状态和经过不同干-湿循环次数后的砂岩进行径向点荷载试验,研究干-湿循环作用对砂岩点荷载强度指数值及饱和单轴抗压强度的影响。试验结果表明:干-湿循环作用对砂岩的点荷载强度指数值及饱和单轴抗压强度均产生明显的劣化作用,12次干-湿循环作用后,点荷载强度指数值下降值为29.02%,饱和单轴抗压强度值下降值为22.74%,并与干-湿循环次数呈现单对数关系,其劣化过程具有渐进性、不可逆性、累积性。
This paper takes the sandstone obtained from an engineering survey as the research object,using the SD-1 point load tester to conduct radial point load tests on sandstone in natural state and after different dry-wet cycles to study the influence of dry-wet cycles on strength index value and saturated uniaxial compressive strength of sandstone point load.The test results show that the point load strength index value and saturated uniaxial compressive strength of sandstone are obviously deteriorated by dry-wet cycles.After 12 dry-wet cycles,the point load strength index value decreases by 29.02%,and the saturated uniaxial compressive strength value decreases by 22.74%,while there is a single logarithmic relationship with the number of dry-wet cycles.The degradation process is gradual,irreversible and cumulative.
作者
胡兵
Hu Bing(China Petroleum Engineering&Construction Corp.North China Company)
出处
《勘察科学技术》
2023年第1期7-9,31,共4页
Site Investigation Science and Technology
关键词
点荷载试验
干-湿循环作用
单轴抗压强度
劣化效应
point load test
dry-wet cycle effect
uniaxial compressive strength
degradation effect
作者简介
胡兵(1986-),男,工程师,主要从事岩土工程勘察设计及场地环境调查等工作。
