Anti-scouring device suitable for pile foundation of pile group in water and construction method thereof

Abstract

The invention discloses an anti-scouring device suitable for a pile foundation of a pile group in water and a construction method thereof, and relates to the technical field of bridge pile foundationreinforcement. The anti-scouring device suitable for the pile foundation of the pile group in water comprises a flexible bearing platform and a reinforced concrete fixing structure which are arrangedin a bed bottom foundation soil layer. The flexible bearing platform is a hollow quadrangular frustum pyramid, the hollow part of the flexible bearing platform is filled with sand and gravel, and theflexible bearing platform is arranged at the bottom of the pile group in a sleeving mode through a plurality of pile holes. The reinforced concrete fixing structure is provided with a special-shaped hole matched with the flexible bearing platform in shape, the flexible bearing platform is embedded into the special-shaped hole, and the anti-scouring device for the pile foundation of the pile groupis formed. According to the anti-scouring device suitable for the pile foundation of the pile group in water and the construction method thereof, damage of horseshoe-shaped vortexes and trailing vortexes to the pile foundation can be effectively inhibited, the contact part of the device and the pile foundation can protect the pile foundation from being scoured and corroded by water, and the bearing capacity of the pile foundation of the pile group is improved; and meanwhile, the anti-scouring device suitable for the pile foundation of the pile group in water is suitable for a built bridge pilefoundation and an unexpanded bridge pile foundation, and has the characteristics of being simple and rapid in construction, low in cost, safe and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of bridge pile foundation reinforcement. 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 bridge damage i...

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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