自然界中巖體的力學(xué)行為多數(shù)表現(xiàn)為各向異性,現(xiàn)有的巖體質(zhì)量分級方法大多是基于各向同性假設(shè),因此遠遠難以滿足工程要求。本研究在中國巖體質(zhì)量分級標(biāo)準(zhǔn)BQ的基礎(chǔ)上,提出了一種各向異性巖體質(zhì)量分級系統(tǒng)A-BQ。該系統(tǒng)可用來評估巖體的各向異性程度,同時還可以對各向異性巖體的質(zhì)量進行評估分級。系統(tǒng)中考慮了巖石的固有各向異性和巖體結(jié)構(gòu)的各向異性,分別采用巖石強度的各向異性和巖體完整性系數(shù)的各向異性表征。巖體的各向異性程度通過不同作用方向下巖體的最好與最差質(zhì)量得分之比確定,并由圍巖應(yīng)力進行調(diào)整�；趲r體各向異性結(jié)構(gòu)的產(chǎn)狀,結(jié)合巖體最好和最差質(zhì)量得分,可計算各向異性巖體的基本得分,再通過應(yīng)力狀態(tài)和地下水因子的校正,獲得各向異性巖體的ABQ值,在此基礎(chǔ)上將巖體質(zhì)量分為5級。針對不同巖體質(zhì)量級別給出了隧道和邊坡工程可能的穩(wěn)定性狀態(tài)和破壞模式。最后以實際的各向異性巖體隧道和邊坡工程為例,對該分級方法進行了應(yīng)用。

【文章頁數(shù)】：13 頁

【文章目錄】：
1 Introduction
2 Approach to propose classification system
3 A-BQ classification system
    3.1 Rating for anisotropy degree
        3.1.1 Inherent strength anisotropy of rock matrix
        3.1.2 Structure anisotropy of rock mass
        3.1.3 Classification of anisotropy degree
    3.2 Quality classification for anisotropic rock mass in engineering
        3.2.1 Tunnel engineering anisotropic rock mass
        3.2.2 Slope engineering anisotropic rock mass
        3.2.3 Quality classification
    3.3 Stability assessment of anisotropic rock mass in engineering
        3.3.1 Stability assessment of tunnel engineering
        3.3.2 Stability assessment of slope engineering
4 Application to case studies
    4.1 Phyllite rock mass tunnel engineering
        4.1.1 Anisotropy degree classification of phyllite rock mass
        4.1.2 Quality classification for Liangshui tunnel engineering
    4.2 Slate rock mass slope engineering
        4.2.1 Anisotropy degree classification of slate rock mass
        4.2.2 Quality classification for Jiujiang quarry slope engineering
5 Concluding remarks
Contributors
Conflict of interest



本文編號：3767476