目 次
1总则
2术语、符号
2.1术语
2.2符号
3岩体基本质量的分级因素
3.1分级因素及其确定方法
3.2岩石坚硬程度的定性划分
3.3岩体完整程度的定性划分
3.4定量指标的确定和划分
4岩体基本质量分级
4.1基本质量级别的确定
4.2基本质量的定性特征和基本质量指标
5工程岩体级别的确定
5.1 般规定
5.2工程岩体级别的确定
附录A Kv、人测试的规定
附录B岩体初始应力场评估
附录C岩体及结构面物理力学参数
附录D岩体基本质量指标的修正
附录E地下工程岩体自稳能力
附录F本标准用词说明
1总则
1.0.1 为建立统一的评价工程岩体稳定性的分级方法;为岩石工程建设的勘察、设计、施工和编制定额提供必要的基本依据,制定本标准。
1.0.2本标准适用于各类型岩石工程的岩体分级。
1.0.3工程岩体分级,应采用定性与定量相结合的方法,并分两步进行,先确定岩体基本质量,再结合具体工程的特点确定岩体级别。
1.0.4工程岩体分级所必需的地质调查和岩石试验,除应符合本标准外,尚应符合有关现行国家标准的规定。
2术语、符号
2.1 术语
2.1.1 岩石工程 rock engineering
以岩体为工程建筑物地基或环境,并对岩体进行开挖或加固的工程,包括地下工程和地面工程。
2.1.2工程岩体 engineering rock mass
岩石工程影响范围内的岩体,包括地下工程岩体、工业与民用建筑地基、大坝基岩、边坡岩体等。
2.1.3岩体基本质量 rock mass basic quality
岩体所固有的、影响工程岩体稳定性的最基本属性,岩体基本质量由岩石坚硬程度和岩体完整程度所决定。
2.1.4结构面 structural plane (discontinuity)
岩体内开裂的和易开裂的面,如层面、节理、断层、片理等,又称不连续面。
2.1.5 岩体完整性指数(Kv)(岩体速度指数) intactness index of rock mass (velocity index of rock mass)
岩体弹性纵波速度与岩石弹性纵波速度之比的平方。
2.1.6 岩体体积节理数(Jv) volumetric joint count of rock mass
单体岩体体积内的节理(结构面)数目。
2.1.7 点荷载强度指数(I8(50)) point load strength index
直径50 mm圆柱形试件径向加压时的点荷载强度。
2.1.8 地下工禾呈岩体自稳能力(stand—up time of rock mass for underground excavation)
在不支护条件下,地下工程岩体不产生任何形式破坏的能力。
2.1.9 初始应力场 initial stress field
在自然条件下,由于受自重和构造运动作用,在岩体中形成的应力场,也称天然应力场。
Contents
1. General Provisions
2. Terminologies and Symbols
2.1 Terminologies
2.2 Symbols
3. Gradation Factor of Rock Mass Basic Quality
3.1 Gradation Factor and Its Determination Method
3.2 Qualitative Classification of Rock Hardness Degree
3.3 Qualitative Classification of Rock mass Intactness
3.4 Determination and Classification of Quantitative Index
4. Classification of Rock Mass Basic Quality
4.1 Determination of Basic Quality Classes
4.2 Qualitative Attribute and Index of Basic Quality
5. Engineering Classification of Rock Masses
5.1 General Rules
5.2 Engineering Classification of Rock Masses
Appendix A Test Specifications of Kv and Jv
Appendix B Evaluation on Initial Stress Field of Rock Mass
Appendix C Physical and Mechanical Parameters of Rock Mass and Structural Plane
Appendix D Correction of Rock Mass Basic Quality Index
Appendix E Stand-up Time of Rock Mass for Underground Excavation
Appendix F Explanation of Wording in this Standard
Additional Explanation
1. General Provisions
1.0.1 This Standard is formulated with a view to establish an unified method for evaluating the engineering classification of stability of rock masses; provide necessary basis for investigation, design, construction and authorized personnel quota regarding rock engineering construction.
1.0.2 This Standard is applicable to engineering classification of various rock masses.
1.0.3 Engineering classification of rock masses shall adopt a combination of qualitative and quantitative methods, and be carried out in two steps; first to determine the rock mass basic quality and then, rock mass the class of rock mass by combined with the characteristics of specific works.
1.0.4 The geologic survey and rock test required for the engineering classification of rock masses shall not only comply with this Standard, but shall also comply with the provisions specified in current national standards.