Replacement processing structure and method for water burst channel of underground cavern

Abstract

The invention discloses a replacement processing structure and method for a water burst channel of an underground cavern. The processing structure comprises a grit chamber formed in a rock mass in thewater coming direction of a karst pipeline through expanding excavation, an artificial culvert is arranged behind the grit chamber, and the artificial culvert is communicated with a pipeline in the drainage direction; the karst pipeline is communicated with a drainage ditch in a underground cavern space, and a controllable common drainage system is formed; a connecting channel is formed between the artificial culvert and the drainage ditch, and a bidirectional water quantity control valve is arranged at a channel opening of the connecting channel. After a high-pressure large-flow water burstof the underground cavern is treated through the technical scheme, an original channel is locally changed by the water burst, and the water burst is discharged out of the culvert through the artificial culvert; an anti-seepage consolidation ring around a water burst point bears external water pressure generated by increase of the underground water level and achieves an anti-seepage function; a radial drainage hole is used for pressure relief and drainage guide, and the dryness and stability of the cavern can be guaranteed. The problem of high-pressure large-flow water burst of the undergroundcavern is solved in a short construction period and at low investment.

Description

technical field [0001] The invention belongs to the fields of underground engineering technology and geology, and relates to a treatment method suitable for high-pressure and large-flow concentrated water gushing in karst pipelines and fault structures in underground caverns such as tunnels (caves). Background technique [0002] With the improvement of my country's transportation network and the development of hydropower resources in the west, the construction of tunnels (caves) and other underground caverns has shifted to the western region with high terrain and complex geological conditions. It has the characteristics of large buried depth, high ground stress, high water pressure and rich groundwater supply. [0003] If no measures are taken to control water gushing from karst pipelines and fault structures in underground caverns such as tunnels (caves), it will not only seriously affect construction safety and progress, but also have extremely adverse effects on future pro...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to systematically solve the problem of high-pressure and large-flow concentrated water gushing in underground caverns such as tunnels (caves), karst pipelines, and fault structures, to maintain natural water flow, to make full use of the drainage system of caverns to reduce pressure, and to use surrounding rocks to prevent seepage The consolidation ring bears the temporary external water pressure to ensure the stability and dryness of the structure in the underground cavern, and ensure the long-term safe and reliable operation of the underground cavern

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