Mold spraying concrete construction method and wet spraying trolley

Abstract

The invention provides a mold spraying concrete construction method. The mold spraying concrete construction method comprises the following steps that M templates are adopted for sequential and circular construction, and a formwork with a proper width is determined according to the condition that the initial setting time of concrete is equal to the spraying construction time of (M-1) formworks; and by means of the solidification time difference of the sprayed concrete, the firstly-sprayed concrete is solidified to reach the initial solidification state, when the spraying of the M formwork is completed, the concrete in the first formwork is solidified to reach the initial solidification state, at the moment, the first formwork can be moved for spraying construction, continuous construction can be achieved without waiting, and the defect that a single large-span mold spraying formwork can move only after concrete in a mold cavity is completely solidified to reach an initial setting state every time is overcome. The width of the formwork is proper, so that a spray head directly and obliquely sprays on the spraying face under the condition that the spray head inclines by a certain angle, the concrete is compacted, and voids and pitted surfaces of the concrete are avoided. The invention further provides the wet spraying trolley adopted by the mold spraying concrete construction method.

Description

technical field [0001] The invention relates to the technical field of concrete spraying, in particular to a sprayed concrete construction method and a wet spraying trolley. Background technique [0002] In the initial support construction of the tunnel, the sprayed concrete technology is a new construction method, which changes the "spraying" concrete directly to the surrounding rock to "spraying and compressing" the concrete to the space between the formwork and the surrounding rock, so as to completely Solved the problem of dust and rebound. The mold spraying method is to set a template on the rock wall of the tunnel, so that a cavity is formed between the template and the rock wall of the tunnel; then the nozzle is placed at the entrance of the cavity, and the concrete is quickly sprayed into the cavity to fill the cavity. At the same time, in the existing construction, in order to ensure that the tunnel does not collapse, steel arch frames are used to support the inner...

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a sprayed concrete construction method, aiming to solve the problem of long construction time and easy generation of honeycomb pockmarks in the existing sprayed concrete construction, which affects the construction quality The specific technical solutions are as follows:

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