Method for controlling blasting vibration in adjacent existing tunnel excavation

Abstract

The invention discloses a method for controlling blasting vibration in adjacent existing tunnel excavation. The method comprises the following steps of setting out for hole layout, shock-absorbing hole layout, positioning and drilling, hole clearing, charging, connecting with a detonating network, excavation and supporting, unexplored dynamite disposing, monitoring and measurement and the like. Through the adoption of a reasonable grooving process, a hole layout mode, a charging structure, a detonation method and a vibration damping method, the disturbance to the existing tunnel during the excavation process can be reduced as far as possible, the excavation footage can be effectively increased, the amount of explosives can be effectively reduced, and the cost is reduced when the construction period is shortened, thereby shortening the impact period of blasting disturbance. The method has great guiding significance and promotion value for newly building tunnels near the adjacent existing tunnels, and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a method for controlling blasting vibration during excavation adjacent to an existing tunnel. Background technique [0002] With the rapid development of the national economy, my country's traffic pressure has further increased, and traffic construction has entered a new climax period. Many operational tunnel projects can no longer meet the current traffic demand. Considering resources and investment costs, etc., near the operational tunnel Building new tunnels is a practical solution. However, the excavation projects of adjacent tunnels are developing toward a trend of larger and larger excavation areas, closer excavation distances, and more and more complex conditions around the excavation. There are different degrees of defects and defects, so that the blasting and excavation of newly-built tunnels may bring safety hazards to the daily traffic of oper...

AI Technical Summary

Problems solved by technology

However, the excavation projects of adjacent tunnels are developing toward a trend of larger and larger excavation areas, closer excavation distances, and more and more complex conditions around the excavation. There are different degrees of defects and defects, so that the blasting and excavation of new tunnels may bring safety hazards to the daily traffic of operating tunnels, and cause threats and losses to the lives and properties of the people.

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