Method for stopping water of clearance between wall board and base plate of bearing plate steel suspension box

Abstract

The invention discloses a method for stopping water of a clearance between a wall board and a base plate of a bearing plate steel suspension box. The method comprises the following steps of firstly, uniformly mixing cement mortar and plugging agent waterproof glue according to the proportion of 10:1 and stirring; secondly, casting mixing mortar under a dry water environment, slowly pouring the mixing mortar into the clearance between the wall board of the steel suspension box and a precast concrete base plate of the steel suspension box until the elevation of a casting surface is consistent with that of a precast concrete surface; and at the time of 70 to 74 hours after the ending of the casting of the mixed mortar and when the strength of concrete is greater than compressive design strength by 68 to 72 percent, performing an integral sinking procedure of the steel suspension box. The method for stopping water, disclosed by the invention, has the advantages of simplicity in operation, convenience in operation and low cost; in addition, the mixing mortar in which the plugging agent waterproof glue is added has certain ductility and high crack resistance; and in the integral sinking process of the steel suspension box, even if slight vibration or shake occurs, and the water leaking condition is avoided.

Description

technical field [0001] The invention relates to a method for water-stopping in small gaps of caps in bridge engineering, in particular to a method for water-stopping the gap between a steel suspension box wall plate and a bottom plate of caps in bridge engineering in water. Background technique [0002] In the construction of bridge caps in water, steel hanging box cofferdams are often used. For the water-stopping technology of the gap between the steel hanging box wall plate and the bottom plate, there are two commonly used methods at present: the first is to wait for the steel hanging box to be lowered. After sinking to the design position, pour the bottom cover concrete of the platform under water; the second method is to fill the gap between the wall plate and the bottom plate of the steel hanging box with rubber skin in a dry water environment. For the first method, because the caps generally have a large area and the thickness of the back-sealing concrete is generally ...

AI Technical Summary

Problems solved by technology

For the first method, because the caps generally have a large area and the thickness of the bottom concrete is generally more than 1m, the required concrete volume is large and the cost is high. At the same time, the self-weight of the bottom concrete is also large, which increases the need for The burden of the hanger; for the second method, due to the production and assembly of the steel box and the prefabricated precision of the bottom plate of the steel box, the gap between the wall and the bottom of the steel box is often different in size, and the rubber The thickness of the skin is the same, so by filling the rubber skin to stop water, some gaps will be plugged tightly, and some gaps will not be plugged tightly, which will eventually lead to water leakage

In addition, the rubber skin needs to be drilled at the position where the bolts pass through. This process requires high processing precision and the construction is also very cumbersome.

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