Equipment and method for testing watertightness of box culvert in large size

Abstract

The invention discloses a large-scale water seal testing equipment and the method. The equipment comprises the pressure-adding system, the sealing system, the water filling system, the supporting system and the measuring system. The said sealing system comprises the ring sealed slot frame forming the sealing chamber with the box joint and the sealing belt. The said sealed slot frame is fixed on the supporting system. The said sealing belt is on the end of the sealed slot frame. The said pressure-adding system and the water filling system separately connect the sealed chamber. The invention forms the independent sealed chamber at the joint of the box to implement the seal testing in single-hole clearance method, which overcomes the failures of the traditional method. The whole testing equipment is simple and fast.

Description

technical field [0001] The invention relates to a watertightness detection device and method, in particular to a device capable of detecting the watertightness of a large box culvert for transporting sewage and a method for detecting the watertightness of a box culvert using the detection device. Background technique [0002] Water tightness is a very important indicator for the pipelines that transport sewage. For the box culverts that transport sewage in this project, due to its wide distribution in the plane, the total length is about 4km, and the aperture varies a lot. In summary, the clearance of the box culvert There are four types: 4.25m×3.5m, 1.6m×1.6m, 2.0m×2.8m and 3.2m×2.8m. [0003] type Bottom thickness roof wall panel Inside chamfer 4250×3500 450 450 450 300×300 2800×2000 400 400 400 200×200 3200×2800 350 350 350 250×250 [0004] A...

AI Technical Summary

Problems solved by technology

With the increasing scale of municipal engineering, the problems encountered by this method are: large water consumption and difficulty in finding water sources; when testing box culvert pipes, the steel sealing doors at both ends have to bear huge horizontal thrust, making it difficult to manufacture and install the steel sealing doors; After the box culvert pipe is filled with water, the huge horizontal thrust generated under the action of the internal water pressure will cause the box culvert pipe to produce longitudinal and horizontal displacement, which can easily cause cracking and water seepage of the waterstop; if any local leakage is found, all the water must be removed. After the plugging is released and repaired, it needs to be watered again for inspection; the inspection cycle is long and the cost is high

Therefore, such methods cannot meet the watertightness testing of large pressurized box culverts.

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