Side mold mechanism for concrete mold spraying

Abstract

The invention discloses a side mold mechanism for concrete mold spraying. The side mold mechanism for concrete mold spraying comprises a side mold supporting frame and a telescopic side mold plate assembly, wherein the side mold supporting frame is fixed to the edge part of a mold plate; the side mold plate assembly is mounted on the side mold supporting frame, and can extend and retract in the direction perpendicular to the mold plate, and the extended side mold plate assembly can abut against the rock surface of a tunnel, and thus the rock surface, the mold plate and the side mold plate assembly can match with each other to form a mold cavity. Through the side mold mechanism for concrete mold spraying matching with a tunnel primary supporting mold plate mechanism, the mold cavity is formed among a side mold plate mechanism, a mold plate mechanism and the rock surface, and thus a mold spraying operation can be carried out directly when a steel arch is not constructed; the phenomenon of material leaking caused by a gap between the mold plate mechanism and the steel arch or between the steel arch and the rock surface is avoided even if the pouring construction is performed on the mold cavity formed by being matched with the steel arch, and thus the dosage of pouring raw materials is further saved, and the construction quality of primary supporting spray pouring is improved.

Description

technical field [0001] The invention belongs to the technical field of engineering construction, and in particular relates to a side form mechanism for concrete form spraying. Background technique [0002] Among the existing tunnel engineering machinery, the concrete sprayer is a relatively common construction machinery. The working principle of the concrete spraying machine is to use compressed air to transport the pre-mixed concrete mixture to the nozzle of the spraying machine through the pipeline, and form a bundle after being mixed with accelerator. On the sprayed surface, the quick-setting agent makes the concrete set and harden quickly, thus forming a concrete support layer. Shotcrete technology has been widely used in various engineering fields due to its simple process. [0003] In order to ensure that the concrete support layer can meet the strength requirements within a certain period of time, it is necessary to add a large amount of concrete quick-setting agent...

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Problems solved by technology

[0003] In order to ensure that the concrete support layer can meet the strength requirements within a certain period of time, it is necessary to add a large amount of concrete quick-setting agent to the concrete, and the sprayed concrete has a high rebound rate, which causes unnecessary waste. After the support is formed, its surface If the degree of cleanliness is poor, the surface needs to be reshaped, which prolongs the construction period

[0004] During the practice of spraying or pouring the initial support of the tunnel, the applicant found that the rebound rate of the concrete and the use of concrete quick-setting agents can be effectively reduced by using the formwork mechanism. There will inevitably be unevenness in the excavation surface, and there will be gaps to varying degrees between the supporting surface of the erected steel arch and the excavation surface, and there will also be gaps between the contact surface of the formwork and the steel arch, making During the mold spraying process using the formwork mechanism, the injected concrete will leak from the gap, and at the same time, when the concrete is injected into the mold cavity of the supporting mold, due to the gravity of the concrete itself and the impact force of the concrete spraying, it will cause or even aggravate the concrete from the support. The problem of leakage in the mold cavity

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