Concrete engineering deformation joint vertical water stop cavity die and construction method thereof

Abstract

The invention discloses a concrete engineering deformation joint vertical water stop cavity die. The cavity die comprises a water stop sheet, a framework and an air bag, wherein the air bag is connected with the framework and is arranged on the outer side of the framework; when the cavity die is applied, a part of the water stop sheet is pre-embedded in a first-stage concrete section; the framework is connected with the water stop sheet; the air bag is filled with gas with predetermined gas pressure; after initial setting of second-stage concrete, a semicircular cavity capable of injecting molten asphalt is formed in the second-stage concrete after the gas pressure in the air bag is released and the framework and the air bag are removed. The cavity die has a simple structure and is easy to assemble and use, the problem of seepage of an expansion and contraction joint caused by non-uniform settlement or distortion of a stratum in a water conservancy project can be effectively solved, and the cavity die can be recycled and is low in cost.

Description

technical field [0001] The invention relates to an underground / underwater building waterproof device, in particular to a vertical water-stop cavity mold for deformation joints in concrete engineering and a construction method thereof. Background technique [0002] In existing concrete structures, such as retaining dams, reservoirs, subways, culverts, sluices, tunnels and other underground and underwater projects, due to the inability to pour continuously or the deformation of the foundation settlement (earthquake), or due to temperature changes Due to thermal expansion and contraction of concrete components caused by thermal expansion and contraction, deformation joints and construction joints are often deliberately left during pouring. These gaps must take anti-leakage measures to prevent external water or groundwater from leaking into the structural space. The current common practice is A concrete groove is set between the first-stage concrete and the second-stage concrete...

AI Technical Summary

Problems solved by technology

[0002] In existing concrete structures, such as retaining dams, reservoirs, subways, culverts, sluices, tunnels and other underground and underwater projects, due to the inability to pour continuously or the deformation of the foundation settlement (earthquake), or due to temperature changes Due to thermal expansion and contraction of concrete components caused by thermal expansion and contraction, deformation joints and construction joints are often deliberately left during pouring. These gaps must take anti-leakage measures to prevent external water or groundwater from leaking into the structural space. The current common practice is A concrete groove is set between the first-stage concrete and the second-stage concrete, and soft asphalt and copper sheets or rubber waterstops are arranged in the groove. However, this method requires prefabricated concrete grooves. In order to make the concrete grooves and the second-stage concrete tightly combined, It is necessary to chisel rough treatment on the 3 sides of the concrete trough, which will prolong the construction period and increase labor. At the same time, since the length (height) of each concrete trough is generally only 50-100cm, the deformation gap must be formed by connecting multiple concrete troughs, so it will The generation of multiple transverse gaps and the irregular deformation of multiple concrete tanks will cause the leakage of soft asphalt in the subsequent pouring, and it is difficult to clean up; and the technology of using channel steel instead of concrete tanks in patent application No. 2014100489253, although Compared with the original construction method, it can save costs and shorten the construction period, but because the channel steel must be kept in the dam body and cannot be reused, it still causes waste

Images