Simple environment-friendly device suitable for bridge pier pile foundation scouring prevention and construction method

Abstract

The invention discloses a simple environment-friendly device suitable for bridge pier pile foundation scouring prevention and a construction method, and relates to the technical field of bridge pile foundation reinforcing protection. The simple environment-friendly device suitable for bridge pier pile foundation scouring prevention comprises a horn-shaped protection device. A cavity S is formed inthe protection device, a plurality of through holes are formed in a top plate above the cavity S, and gravel or water flows into the cavity S through the through holes. The protection device is provided with a pile hole penetrating through the upper plate face and the lower plate face of the protection device, the protection device sleeves a pile foundation through the pile hole, and a round bottom plate is attached to the bottom face of a riverbed. If the pile foundation is the pile foundation of a built bridge, the protection device is divided into a plurality of assembling parts, and the plurality of assembling parts are assembled on site to achieve the purpose that the protection device is arranged on the pile foundation in a sleeving mode. The novel protection device can inhibit damage of horseshoe-shaped vortexes and trailing vortexes to the pile foundation, and the part, making contact with the pile foundation, of the device can protect the pile foundation against erosion corrosion of water. Meanwhile, the protection device is suitable for built and unbuilt bridge pile foundations.

Description

technical field [0001] The invention relates to the technical field of bridge pile foundation reinforcement and protection. Background technique [0002] In recent years, my country's economy has developed rapidly, and a large number of large bridges across large rivers, such as the Hong Kong-Zhuhai-Macao Bridge, the Donghai Bridge, the Hangzhou Bay Bridge, and the Lijiatuo Bridge in Chongqing, have been built immediately. Most of these river-crossing bridges adopt deep-water pile group foundations, and their volume and water-blocking area are relatively large. The safety and stability of bridge pile foundations in complex water flow environments not only depend on their stress conditions in complex water environment, but also are related to the shallowing of bridge pile foundations caused by water erosion, which leads to the reduction of pile foundation bearing capacity. And a large number of investigation and statistical results also show that one of the main reasons for ...

AI Technical Summary

Problems solved by technology

The formation and movement of the horseshoe-shaped vortex and wake vortex enhance the transport capacity of the surface material of the river bed, thus forming obvious local scour pits in the bridge pile foundation, which will reduce the effective embedding depth of the bridge pile foundation in the subsoil soil, As a result, the bearing capacity of the pile foundation decreases, which greatly affects the safety and stability of the bridge, and in mountainous cities, the water flow velocity is greater, and the impact of water scour on the safety and stability of the bridge will be even greater.

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