A layout design method for large underground caverns

Abstract

The invention relates to the underground cavern designing method and discloses a large-sized underground cavern group arrangement designing method which is applied to water resources and hydropower engineering and underground storage cavern engineering to scientifically and reasonably confirm positions of the underground cavern group. According to the large-sized underground cavern group arrangement designing method, the rock strength stress ratio, site area crustal stress field characters, the cavern group effect, the main cavern size and the like key factors which influence arrangement of the underground cavern group are considered comprehensively according to the basis that the main cavern group longitudinal axis direction, the main cavern shape and size and the cavern distance are confirmed and the main cavern group valley wall slope rock mass thickness and the overlaying rock mass thickness are further confirmed. The valley slope crustal stress character quantitative analysis method, the valley slope side rock mass thickness computational formula and the cavern group overlaying rock mass thickness confirming method are scientific and reasonable, high in quantization degree, strong in operability, convenient for designer application and applicable to large-sized underground cavern group arrangement and design under various crustal stress levels and complete geological conditions.

Description

technical field [0001] The invention relates to an underground cavern design method, in particular to a large-scale underground cavern group layout design method used in water conservancy and hydropower projects and underground storage projects. Background technique [0002] In the fields of water conservancy and hydropower projects, underground storage projects, etc., it involves the rational layout and design of underground caverns, especially in the underground powerhouses of hydropower stations in western my country. Due to the characteristics of large buried depth, high ground stress, and complex geological conditions, the stability and safety of the surrounding rock of large underground caverns have become very prominent. In recent years, relevant experts in the field of rock mechanics and underground engineering builders have realized more and more clearly that the basic strength of rocks, in-situ stress, development characteristics of structural planes of surrounding ...

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Problems solved by technology

However, the degree of quantification of the method given is not enough, the range of relevant parameters can be taken is relatively large, the degree of dependence on engineering analogy and engineering experience is high, and there is still a large room for improvement