摘要
宜宾志诚港港区大道为长大顺层边坡,岩体为砂泥岩互层,岩层倾角16°,其稳定性问题和处治措施对于港区建设尤为重要。针对施工中发现的边坡变形破坏特征,结合地质调绘、钻探、孔内电视、室内试验、邻近工程经验等,对边坡破坏机理以及稳定性进行了分析。分析结果表明,软硬岩互层、不利的顺层地质结构、坡体自重应力、层间结构面性质差、坡脚开挖及降水等因素是诱发该砂泥岩互层缓倾长大顺层边坡失稳的主要原因。采用抗滑支挡措施处理后,该边坡稳定性得以保证。
The main road of the Zhicheng port area in Yibin Port is a long bedding slope with sandstone-mudstone interbedding, and the rock inclination is 16°. Its stability and treatment measures are particularly important for the construction of the port area. According to the deformation and failure characteristics of the slope found in construction, this paper analyzes the failure mechanism and stability of the slope through geological mapping, drilling, borehole television utilization, laboratory tests, and experience in similar engineering. The analysis results show that soft and hard rock interbedding, unfavorable bedding geological structure, gravity stress of the slope, poor properties of interlayer structural plane, slope toe excavation, and precipitation are the main reasons for the instability of the gently inclined long bedding slope with sandstone-mudstone interbedding. After the anti-slide retaining measures are taken, the stability of the slope is guaranteed.
作者
李剑伟
何勇
杨堉果
田文丰
林锐
LI Jian-wei;HE Yong;YANG Yu-guo;TIAN Wen-feng;LIN Rui(Sichuan Communication Surveying&Design Institute Co.,Ltd.,Chengdu 610017,China)
出处
《水运工程》
北大核心
2023年第S01期143-149,共7页
Port & Waterway Engineering
关键词
顺层边坡
砂泥岩互层
破坏机理
稳定性分析
bedding slope
sandstone-mudstone interbedding
failure mechanism
stability analysis
