Pulse concrete-high pressure air combined sprayer and concrete spraying method

Abstract

The invention relates to a pulse concrete-high pressure air combined sprayer and a concrete spraying method. The pulse concrete-high pressure air combined sprayer is characterized by comprising a pulse control system, a concrete gun, a high pressure air injection system and a high pressure air nozzle, wherein the high pressure air nozzle comprises a bell mouth and an end plate which are in weldedconnection, a concrete gun insert hole is formed in the center of the end plate, and air inlets are formed in the periphery of the concrete gun insert hole; the concrete gun is communicated with the concrete gun insert hole and equipped with a concrete pump and a concrete valve which are in communication connection with the pulse control system; the high pressure air injection system is communicated with the air inlets and equipped with an air compression pump and a high pressure air valve which are in communication connection with the pulse control system. Through the adoption of the structure, concrete rebound can be blocked, material waste is avoided, the concrete attached to surrounding rock can be flattened, extruded and vibrated to make contact with the surrounding rock more firmly,and cavities and gaps in the concrete can be avoided.

Description

technical field [0001] The invention relates to the field of primary lining construction of sprayed concrete for surrounding rock of tunnels, in particular to a pulsed concrete-high-pressure air combined spraying device and a concrete spraying method. Background technique [0002] In the tunnel lining construction process, high-pressure pump trucks are generally used to spray concrete onto the surface of the tunnel surrounding rock as the primary lining, such as the pulse concrete spraying machine with the application number CN201710467538.7, which includes a base, universal wheels, and a concrete warehouse , spray pipe and nozzle; the middle part of the lower surface of the base is fixedly connected with a steering motor, the top of the rotating shaft is fixedly connected with a turntable, the upper surface of the turntable is fixedly connected with a bracket, the lower surface of the spray pipe is hinged with a telescopic mechanism, and the lower surface of the turntable is...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pulse type concrete-high pressure air combined spraying device and concrete spraying method to solve the problem of concrete rebound splashing and falling away from the surrounding rock during the concrete spraying process in the prior art, thereby greatly reducing the rebound of concrete Splashing, improving construction efficiency and reducing project cost

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