Template with rigid-flexible composite structure and partition wall construction method by retaining roadway along goaf thereof

Abstract

The invention relates to a template with a rigid-flexible composite structure, which is composed of two parts: an external rigid template and internal flexible loose tooling arranged in the external rigid template, wherein, the internal flexible loose tooling is an enclosed bag with an expandable opening. The construction method of the template comprises the following steps: fixing the internal flexible loose tooling on a roadway roof or the external rigid template and then connecting pump injection equipment for a concrete conveying pipe for filling concrete into the whole internal loose tooling. If a hard kernel needs to be added to the internal loose tooling, the expandable opening can be opened, building blocks, bricks, detritus or gangue are placed into the opening, and grouting is carried out after sealing. The template with the rigid-flexible composite structure has simple structure, convenient use, and positioning and reshaping features of the rigid template as well as variability of the internal flexible loose tooling so that the whole concrete structural wall can apply a certain setting force to the roof. The method has fast construction speed, high efficiency and good construction effect. The template and the device can be widely applied to industries such as a coal mine, civil engineering, a metallurgical mine, water conservancy, underground construction, national defense and the like.

Description

technical field [0001] The invention belongs to the field of coal mining engineering in coal mines, and in particular relates to a rigid-flexible composite structure formwork and a construction method for a gob-side retaining partition wall. Background technique [0002] Traditional mining face gob entry retention uses wooden piles, dense pillars, gangue bags, material stone walls or concrete continuous walls. The low support strength of wooden stacks and dense pillars cannot meet the needs of most projects. Gangue bags and masonry walls cannot be connected to the roof, resulting in excessive sinking of the roof and poor support effect. The concrete diaphragm wall uses rigid formwork to support the formwork. The disadvantages of these methods are: it requires a lot of manpower and material resources to dry the sand and gravel and mix it with cement. After that, it is bagged and transported to the underground for water mixing again. The labor intensity is high and the constr...

AI Technical Summary

Problems solved by technology

Low support strength of wooden stacks and dense pillars cannot meet the needs of most projects

Gangue bags and masonry walls cannot be connected to the roof, resulting in excessive sinking of the roof and poor support effect

The concrete diaphragm wall uses rigid formwork to support the formwork. The disadvantages of these methods are: it requires a lot of manpower and material resources to dry the sand and gravel and mix it with cement. After that, it is bagged and transported to the underground for water mixing again. The labor intensity is high and the construction speed is slow. ; The rigid formwork is not easy to change with the fluctuation of the top and bottom slabs, resulting in poor airtightness, easy grout leakage in the process of pouring concrete, and it is difficult for the poured concrete to be tightly combined with the coal seam roof

Although flexible formwork solves the problem of roof connection, it cannot solve the problem of wall forming and the construction cost is very high, and it cannot meet the construction needs of walls over 2 meters

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