ROCK MASS CLASSIFICATION SYSTEMS AND KINEMATIC ANALYSIS OF SLATES FROM DIR GROUP, NW, HIMALAYA, PAKISTAN; IMPLICATION FOR SLOPE STABILITY

Geological Behavior Pub Date : 2022-01-01 DOI:10.26480/gbr.02.2022.61.67

Aftab Ur Rahman, Zhang Guangcheng, Asghar Khan, M. K. Puniya, S. Rahman, Zeng Xin

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引用次数: 1

Abstract

Slope stability is an important issue for the construction of roads on hill slopes. 24 slopes cuts have been investigated to determine the slope instability issues and mode of failure along the newly constructed road of Dir-Sheringal Khyber-Pakhtunkhwa, Pakistan. The major rocks are slates and tuffaceous siltstone which are weak to moderately strong in strength. The main objective of this study is to assess the application of rock mass classification systems and kinematic analysis which affects the slopes. The investigation shows that rock mass rating (RMR-basic), and slope mass rating (SMR) values range from 0 to 73 which is poor to normal while geological strength index (GSI) analysis classified the rock mass from poor to good conditions. The Kinematic analysis shows that three types (plane, wedge and topple) of failure mode are present in these slopes. Most of the slopes are unstable and weak where perspective tools and proper installation provide support and prevent future failure. This study shows a good relationship between RMR-basic, SMR, and GSI for different locations.

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巴基斯坦喜马拉雅山脉nw迪尔群板岩岩体分类体系及运动学分析对边坡稳定性的启示

边坡稳定性是山坡道路建设的一个重要问题。为了确定巴基斯坦Dir-Sheringal Khyber-Pakhtunkhwa新建公路沿线的边坡失稳问题和破坏模式，对24个边坡进行了调查。主要岩石为板岩和凝灰质粉砂岩，强度弱至中等。本研究的主要目的是评估影响边坡的岩体分类系统和运动学分析的应用。调查结果表明，岩体质量等级(RMR-basic)和边坡质量等级(SMR)取值范围为0 ~ 73，为差到正常，而地质强度指数(GSI)分析将岩体分为差到好。运动学分析表明，这些边坡存在三种破坏模式(平面、楔形和倾倒)。大多数斜坡都是不稳定和脆弱的，透视工具和适当的安装提供了支撑，防止了未来的失败。研究结果表明，不同地点的RMR-basic、SMR和GSI之间存在良好的关系。

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Geological Behavior

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12 weeks