Retaining dam bottom waterstop mechanism

Abstract

The invention relates to a water stop mechanism at the bottom of a river dam. The dam face plate and the dam foundation are connected by bolts, and the bottom of the water retaining face face facing the water is welded into a whole with a piece of arc material greater than 90 degrees. At the same time, the P-type water-stop rubber is always tightly pressed on the arc, so that no matter the water-blocking panel stops at any water-blocking height, it can play a role in water-stopping. The invention is simple in structure, economical and durable, safe and reliable, solves most of the defects of the traditional bottom water-stop structure, and has great practical value in the field of retaining dams.

Description

technical field [0001] The invention relates to the field of water conservancy engineering, and more specifically relates to a water stop mechanism at the bottom of a dam. Background technique [0002] At present, in the construction of water conservancy river dam projects, especially the assembled hydraulic dam (or hydraulic hinge dam, etc., here collectively referred to as hydraulic dam), there are two main types of water stop at the bottom of the dam, one is a circular bottom The shaft-linked circular hinge support is anchored on the dam foundation, and the upstream of the water-stopping panel is pressed with a P-shaped water-stop strip, which we call L1 type here; one is that the flat bottom shaft is anchored on the dam foundation with bolt links, and the upstream of the water-stopping panel is also Press P-type waterstop, we call it L2 type. [0003] L1 type waterproof type, the advantage is that when the dam is erected and released, any water retaining height can stop...

AI Technical Summary

Problems solved by technology

[0003] L1 type waterproof type, the advantage is that when the dam is erected and released, any water retaining height can stop the water. The disadvantage is that there is a height difference between the circular hinge support and the circular bottom shaft connection, which are not on the same plane. Here It is difficult to press the P-type water-stop rubber on the bottom shaft to prevent water, and it is easy to cause water leakage; the second disadvantage is that the circular hinge support is fixed on the dam foundation. The water panel rotates around it, and the overlapping part with the panel is difficult to waterproof and easy to leak. The most important thing is that the side connection cannot be replaced, because the circular bottom shaft and the circular hinge support of this structure cannot be disassembled. After the rubber ages, a long-term leakage point is formed; the third disadvantage is that the circular bottom shaft and the circular hinge support cannot be disassembled, and their material is steel, which needs regular anti-corrosion, because the structure between them is tight and cannot be disassembled , so it cannot be anti-corrosion, seriously affecting its service life

[0004] L2 type waterproof type, the advantage is that the water blocking panel and the dam foundation are connected by bolts, easy to disassemble, so there is no dead angle for corrosion protection, and when the dam is erected to the highest water level, the water blocking panel squeezes the P-type water-stop rubber, because there is no height difference on the same plane , the waterproof effect is good, and it is not easy to leak; the first disadvantage is that the water blocking panel cannot adjust the water level height at will, because the P-shaped rubber at other positions cannot be squeezed with the water blocking panel except for the highest water level, so this structure can only have one kind of blocking The water height has its limitations; the second disadvantage is that the river channel is more complicated, and there are many kinds of debris such as sediment, branches, stones, etc. Sometimes the debris is easy to get stuck on the bottom of the P-type water-stop rubber and the water-blocking panel , resulting in water leakage

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