A relaxation treatment method for excavation of multi-layer structure rock mass dam foundation

A multi-layer structure and excavation relaxation technology, which is applied in excavation, infrastructure engineering, construction, etc., can solve the problems of difficulty in controlling the excavation quality of the upper rock mass and low construction efficiency, so as to ensure the quality of excavation and improve the construction quality. Efficiency, damage reduction effect
CN109780950BActive Publication Date: 2021-07-09CHINA THREE GORGES PROJECTS DEV CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA THREE GORGES PROJECTS DEV CO LTD
Publication Date
2021-07-09

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Abstract

The present invention provides the present invention provides a multi-layer structure rock mass dam foundation excavation relaxation treatment method, which is an optimal dam foundation excavation relaxation based on structural surface pre-reinforcement, pre-consolidation grouting, diffuse energy blasting and hole bottom detonation. processing technology. Compared with the traditional layered excavation method of protective layer, this method does not need to use three-layer excavation, which reduces construction interference, improves construction progress, and shortens construction period; at the same time, it effectively controls the excavation of multi-layered rock mass. Digging into slack and damage control puzzles.
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Description

technical field

[0001] The invention belongs to the technical field of blasting and excavation of complex rock mass, in particular to a method for treating the relaxation of multi-layer structure rock mass dam foundation excavation. Background technique

[0002] As an efficient and economical construction technology, engineering blasting is widely used in the construction of water conservancy, mining, and transportation projects, especially in the blasting and excavation of rock masses such as tunnels, slopes, and dam foundations.

[0003] During the blasting and excavation of rock mass, due to the effect of blast load, dynamic damage to the retained rock mass will inevitably occur while the rock blasting is completed. At the same time, complex rock mass, especially multi-layer structure rock mass, will also aggravate this effect; pretreatment measures during construction, blasting excavation methods, and charging network parameters will all affect the relaxation and impact ...

Claims

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