云南红河某水电站上第三系砾岩胶结性状对岩体强度特征影响研究  

Study on the Effect of Cementation Properties of Neogene Conglomerate on Strength Characteristics of Rock Mass in a Hydropower Station,Yunnan Province

作　　者：李振嵩[1] 陈杰[1] 

机构地区：[1]中水珠江规划勘测设计有限公司,广东广州510610

出　　处：《资源环境与工程》2016年第3期389-394,共6页Resources Environment & Engineering

摘　　要：通过对上第三系砾岩成分的研究,将坝址地层岩性分为Ⅰ-Ⅴ类胶结性状,依次对应半成岩、极软岩、软岩、较软岩、中硬岩,并对Ⅰ-Ⅲ类胶结性状的砾岩进行现场岩体试验,表明Ⅰ、Ⅱ类胶结性状的砾岩强度下降幅度大,甚至大幅超过软化系数,预测Ⅲ类胶结性状的砾岩强度下降幅度略超软化系数,根本原因与Ⅰ、Ⅱ类胶结性状的胶结物强度损失幅度密切相关。Through the study on the chemical constituents of Neogene conglomerate, the dam site lithology is divided into type Ⅰ -Ⅴ type cementation properties, followed by the corresponding half-diagenesis, extremely soft rock, soft rock,hard rock, and the in-situ test of Ⅰ - Ⅲ type cementation properties of conglomerate is carried out. It indicates that the class Ⅰ and Ⅱ cementation characteristics of conglomerate have a large decrease in strength,even more sharply than the softening coefficient. The strength of Ⅲ type cementation properties of conglomerate decreases slightly over softening coefficient, the root cause is closely related to the strength loss of cementation properties of type Ⅰand Ⅱ.

关 键 词：上第三系砾岩 胶结物 胶结性状 变形模量 抗剪强度 卸荷—吸湿 

分 类 号：TU452[建筑科学—岩土工程]