This code specifies the main contents and methods of the engineeringgeological investigation of underground works, as well as theengineering geological assessment and technical requirements forgeological works during the construction.This code is applicab...[继续阅读]

    The following referred documents are indispensable for theapplication of this document. For the dated references, anysubsequent edition or amendments (excluding the misprint contents)are not applicable to this document. However, it’s encouraged tostudy wh...[继续阅读]

    3.0.1 This code is formulated to unify the contents and technicalrequirements of engineering geological investigation for undergroundworks of hydropower and water resources projects, and improve thequality of engineering geological investigation.3.0.2 The...[继续阅读]

    The following terms and definitions are applicable to this code.4.0.1 Surrounding rocksThe rock mass around the underground caverns, in which the stressredistribution occurs due to the excavation, or which may have animpact on the stability and deformatio...[继续阅读]

    5.1.1 The main investigation of basic geological conditions shallinclude the following: topography and geomorphy, stratigraphy andlithology, geological structure, physic-geological phenomena, karst,hydro-geological conditions, etc.5.1.2 The investigation ...[继续阅读]

    5.2.1 The investigation of the physical and mechanical property ofsurrounding rocks shall include the followings.(1) The density, saturated uniaxial compressive strength, point loadstrength, elasticity modulus, Poisson’s ratio, wave velocity value ofrocks...[继续阅读]

    6.1.1 The engineering geological mapping shall comply with thefollowings.(1) Based on the collected terrain and geological data, engineeringgeological mapping of the tunnel area shall be carried out. Themethod, scope and scale in each investigation design...[继续阅读]

    6.2.1 Engineering geological mapping shall conform to thefollowings.(1) Based on the collected terrain geological data, engineeringgeological mapping for underground powerhouse system shall becarried out; basic geological condition of the undergroundpower...[继续阅读]

    7.1.1 The selection of tunnel route shall conform to the followingprinciples.(1) The tunnel route selection shall be carried out according to theengineering geological conditions of the tunnel, and based on therequirement of hydraulic tunnel application a...[继续阅读]

    7.2.1 The classification of surrounding rocks shall be divided intopreliminary and detailed ones. According to the classification, theoverall stability of the surrounding rocks shall be assessed, whichmay be used as a basis for determining the support typ...[继续阅读]