Prestressing force stiffened structure for concrete faced rockfill dam and construction method thereof

Abstract

The invention discloses a prestressing force stiffened structure for a concrete faced rockfill dam and a construction method thereof. The stiffened structure comprises spring cases, reinforced beams,stopping beams, binding wires and geogrids. The geogrids are flatly laid between adjacent rockfill material layers. The spring cases are fixed to one ends of the corresponding rockfill material layers. Springs are arranged inside the corresponding spring cases. The ends of the springs are fixedly connected with one ends of the reinforced beams, and stopping beam holes are formed in the other endsof the reinforced beams. A plurality of holes are formed in the reinforced beams in the axis extension direction. The binding wires penetrate through the holes in the reinforced beams to bind and connect the geogrids together. After the springs are extended to generate prestressing force, the stopping beams penetrate through the stopping beam holes of the reinforced beams of the same rockfill material layers at the other ends of the rockfill material layers so that all the reinforced beams of the corresponding layers can be connected into a whole, and prestressing force interlocking is produced. According to the prestressing force stiffened structure for the concrete faced rockfill dam and the construction method thereof, tensile force is applied to the reinforced beams through an externalprestressing force device and further transmitted to the spring cases so that prestressing force can be applied, the interlocking effect of geogrid meshes and rockfill materials is improved and the integrality is good.

Description

technical field [0001] The invention relates to a prestressed reinforced structure and a construction method for a stone dam, in particular to a prestressed reinforced structure and a construction method for a face rockfill dam. Background technique [0002] Reinforced concrete face rockfill dam (referred to as face rockfill dam) has good stability, seepage resistance and earthquake resistance, and is widely used in water conservancy projects. The panel is used as an anti-seepage structure, and the downstream slope is often protected by masonry. [0003] When a high face rockfill dam is subjected to strong earthquakes, due to the whiplash effect, the reciprocating seismic inertial force may loosen the rockfill materials in the dam crest area, resulting in cracking, leakage and misalignment of the upstream face plate and downstream masonry. platform, seriously threatening the safety and economic effects of the dam. Therefore, it is necessary to take reasonable seismic reinf...

AI Technical Summary

Problems solved by technology

However, reinforced structures composed of different reinforced materials have their own advantages and disadvantages, which are mainly reflected in: (1) This type of reinforced structure composed of steel mesh and reinforced concrete lattice beams has high strength, and the mesh and rockfill materials can form Strong interlocking effect and other advantages, but the disadvantage is that the cost is too high

(2) Although the cost of the steel-plastic geogrid is low, the reinforced structure composed of a single steel-plastic geogrid is laid freely on the rock-fill material, which is too soft, and its mesh cannot form a firm interlocking effect with the rock-fill material. And the reinforced structure is difficult to connect with the reinforced concrete panel

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