Water bag filling pipe type combined arch frame and construction process thereof

Abstract

The invention discloses a water bag filling pipe type combined arch frame and a construction process thereof. The water bag filling pipe type combined arch frame comprises multiple sections of steel pipes; the multiple sections of steel pipes are connected through connecting sleeves to form an arched-shaped cross section; multiple high-performance fiber bag bodies are pasted in each section of steel pipe and are opened in advance at the position of a water injection hole and the two ends of each section of steel pipe to play a role of fixing the bag bodies; liquid is injected into the high-performance fiber bag bodies; and meanwhile, an anti-bending reinforcing steel bar is arranged on the inner arc side of the steel pipe arch frame so as to improve the bending bearing capacity of the archframe. By adopting the water bag filling pipe type combined arch frame, high-concentration fiber cement slurry is injected into gaps of the connecting sleeves, so that the whole device forms the combined arch frame; and the inner bag bodies of the water bag filling pipe type combined arch frame have the micro-expansion property, and the multiple bag bodies are mutually extruded, fill an inner cavity of each section of steel pipe and are in wet connection with the cement at a connector to form a whole body so as to fully fill the whole arch frame.

Description

technical field [0001] The invention belongs to the field of underground engineering support, and in particular relates to a water bag-filled tubular composite arch frame and a construction process thereof. Background technique [0002] With the development of my country's underground projects in the direction of deep burial and extra-large, the stability of the surrounding rock is getting worse and worse, the geological conditions of many projects are getting worse, and the support work is becoming more and more difficult. Seriously affect the safe construction of underground projects in our country, and may cause support failure. The space of coal mine underground roadway is small, which is easy to cause inconvenience in construction. The concrete-filled steel tube support has high bearing capacity and simple construction, and has become a support structure widely used in deep soft rock and other deep engineering support fields. Concrete filled steel tubes belong to the c...

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a water bag-filled tubular composite arch frame and its construction technology. The steel pipe can be filled with water bag instead of concrete. At the same time, the steel pipe can also be replaced with GFRP pipe (i.e. glass steel pipe). It is convenient to release water. After the arch frame is installed, it is filled with water through the water injection hole. After the arch frame is used, the arch frame can be recovered by emptying the water bag through the water injection hole. This solves the problem of high cost of steel tube concrete support, non-recyclable utilization, and complicated concrete pouring process. series of questions

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