Method for quantitatively evaluating surrounding rock stability of ultra-large underground cavern group in construction period

Abstract

The invention relates to a method for monitoring the surrounding rock stability of an ultra-large underground cavern group in a construction period, in particular to a method for monitoring the surrounding rock stability of an ultra-large underground cavern group and used in a hydropower station construction period. The method includes the following steps: collecting geological parameters of surrounding rock through various geological collection methods, judging whether the geology of the surrounding rock is instable remarkably according to the collected geological parameters, processing the collected geological parameter information on yes judgment and grading the processed data with each grade of data corresponding to the preset stability degree judging value. The method for effectively and quantitatively evaluating the surrounding rock stability of the ultra-large underground cavern group in the construction period has the advantages of being capable of acquiring directly-perceived accurate stability judgment data and favorable for stabilizing the surrounding rock, ensuring construction safety and guaranteeing smooth engineering construction and long-term safe stable operation. The method is especially suitable for monitoring the surrounding rock stability of the ultra-large underground cavern group in the construction period.

Description

technical field [0001] The invention relates to a method for quantitatively evaluating the stability of surrounding rocks during the construction period of super-large underground caverns, in particular to a method for monitoring the stability of surrounding rocks of super-large underground powerhouse caverns during the construction period of hydropower stations. Background technique [0002] The engineering problems of ultra-large underground caverns are complex, and many works are beyond the existing experience and practical understanding. There are no special underground powerhouse design specifications to follow, and no similar projects and research results for reference. The problems are complex and challenging. Limited by the complexity of engineering problems of super-large underground caverns, the existing technical level and practical knowledge, there is no work flow, standard and method system for evaluating the stability and safety of surrounding rock during the co...

AI Technical Summary

Problems solved by technology

[0002] The engineering problems of super-large underground caverns are complex, and many works are beyond the existing experience and practical understanding. There is no special design code for underground powerhouses to follow, and there are no similar projects and research results for reference. The problems are complex and challenging

Limited by the complexity of engineering problems of super-large underground caverns, the existing technical level and practical knowledge, there is no work flow, standard and method system for evaluating the stability and safety of surrounding rock during the construction of super-large underground caverns. Existing designs and evaluations are mostly based on empirical analogy, and the working procedures lack systematicness and coherence, and cannot truly implement the cyclical excavation design mode of "design→construction→monitoring→feedback→prediction→design change→guidance for construction" At the same time, surrounding rock stability evaluation methods such as surrounding rock classification and engineering analogy, geological model tests, reference codes, and numerical analysis are mostly in a qualitative way in the safety evaluation of surrounding rock stability in super-large underground caverns. It is the application of a single method or a single index in the evaluation of surrounding rock stability, which lacks comprehensiveness and representativeness

[0003] Therefore, the stability of the surrounding rock during the construction period of the super-large underground cavern group is prominent, and safety control is difficult, which brings great troubles to the engineering design and construction. There is a lack of a systematic process, method and standard that can quantitatively evaluate the stability of the surrounding rock. sexual method

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