三峡库区泥质灰岩溶蚀作用与边坡岩体破坏
|
摘要
三峡库区泥质灰岩边坡的溶蚀与破坏问题,影响到三峡工程的顺利进行,正确掌握它的破坏规律,有利于边坡治理与防护工作。本文从岩体的基本地质信息入手,分析溶蚀作用从不同方面对边坡工程性质的影响。主要包括:岩体内部可溶岩成分被溶蚀后泥质成分富集,岩体成份发生变化;岩体密集节理裂隙发育,结构疏松,成为溶蚀液体的入渗通道,加剧深层岩体的溶蚀作用发生。溶蚀作用叠加不同的地质破坏因素后,三峡库区泥质灰岩岸坡的变形破坏类型总结为三类:薄-中厚层块裂式破坏、中-厚层点裂式破坏、厚-巨厚层层裂式破坏。
The dissolution process and the rock mass breakage of marlite slope in Three Gorges Reservoir Region affect the Three Gorges Project to go along.Holding the breakage law benefits to the slope's control and fence.The article begins with the basic geology information.And the different relations between the dissolution process and the slope rock mass properties are analyzed.The central contents include two parts.Firstly,the dissolvable minerals are dissolved and the mud component is enriched.The mineral ingredients have changes.Secondly,the dense joints and crannies develop in the rock mass.Therefore the rock mass structures turn loose.The joints and crannies become the infiltration path for the solution liquid.All these accelerate the dissolution process in the deep part of rock bed.So the dissolution process,together with many geological breakage factors,rebuild the marlite slope in the different breakage styles,which can be summarized in three types: block split in the thin-medium bed,point split in the medium-thick bed,layer split in the thick-huge bed.
The dissolution process and the rock mass breakage of marlite slope in Three Gorges Reservoir Region affect the Three Gorges Project to go along.Holding the breakage law benefits to the slope's control and fence.The article begins with the basic geology information.And the different relations between the dissolution process and the slope rock mass properties are analyzed.The central contents include two parts.Firstly,the dissolvable minerals are dissolved and the mud component is enriched.The mineral ingredients have changes.Secondly,the dense joints and crannies develop in the rock mass.Therefore the rock mass structures turn loose.The joints and crannies become the infiltration path for the solution liquid.All these accelerate the dissolution process in the deep part of rock bed.So the dissolution process,together with many geological breakage factors,rebuild the marlite slope in the different breakage styles,which can be summarized in three types: block split in the thin-medium bed,point split in the medium-thick bed,layer split in the thick-huge bed.
引文
[1]张加桂.三峡地区泥灰质岩石在岩溶和风化过程中力学性质的变化[J].岩石力学与工程学报,2004,23(7):1073-1077.
[2]张年学,盛祝平,孙广忠,等.长江三峡工程库区顺倾岸坡研究[M].北京:地震出版社,1993.
[3]常中华,伍法权,刘海燕,等.三峡库区奉节新县城库岸边坡类型及其岩体结构特征[J].岩石力学与工程学报,2005,24(17):3057-3063.
[4]唐辉明,邓清禄.三峡库区巴东组斜坡变形特性及机理研究[R].武汉:中国地质大学,2005.
[5]罗元华,伍法权,常中华.三峡库区奉节县新城区T2b3泥质灰岩斜坡变形破坏模式的现象学研究[J].岩石力学与工程学报,2005,24(12):2029-2034.
[2]张年学,盛祝平,孙广忠,等.长江三峡工程库区顺倾岸坡研究[M].北京:地震出版社,1993.
[3]常中华,伍法权,刘海燕,等.三峡库区奉节新县城库岸边坡类型及其岩体结构特征[J].岩石力学与工程学报,2005,24(17):3057-3063.
[4]唐辉明,邓清禄.三峡库区巴东组斜坡变形特性及机理研究[R].武汉:中国地质大学,2005.
[5]罗元华,伍法权,常中华.三峡库区奉节县新城区T2b3泥质灰岩斜坡变形破坏模式的现象学研究[J].岩石力学与工程学报,2005,24(12):2029-2034.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心