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Ecological flow guide fender pier structure for long-span wading bridge

An ecological and water-wading technology, which is applied to bridges, bridge parts, bridge construction, etc., can solve the problems of energy and material exchange blockage between water flow and river flow, deterioration of bridge navigation conditions, and no diversion effect, etc., to improve The effect of surrounding ecological environment, ensuring stability and optimizing navigation conditions

Pending Publication Date: 2022-04-15
CHONGQING JIAOTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional pier structure usually does not have a diversion effect, which leads to the deterioration of the navigation conditions near the bridge. At the same time, it is difficult to produce the flow pattern of alternating rapids and slow flows and the combination of erosion and siltation in the non-navigation area of ​​this section, resulting in the gap between the water flow near the pier and the river flow. Energy and matter exchange is blocked

Method used

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  • Ecological flow guide fender pier structure for long-span wading bridge
  • Ecological flow guide fender pier structure for long-span wading bridge
  • Ecological flow guide fender pier structure for long-span wading bridge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] This embodiment adopts the "λ" shape diversion pier structure, the structure is as follows figure 2As shown, the difference is that no groove is provided on the top surface of the abutment dam, and the "λ"-shaped diversion abutment structure is arranged upstream of the pier 1 . The left side of the pier is the main channel, and the main channel is guided into the main channel through the diversion dam and the pier dam. Fish nest bricks are used at the foot of the "λ" diversion abutment structure, pile sinking structure is used at the head of the diversion dam, and rockfill is used for the rest of the dam body and diversion abutment structure. The angle between the diversion dam and the water flow is set to 30°, and the overall top width of the structure is 1.0m. According to the water depth of the river, the height of the structure is 3.6m, so its top elevation is 1272.6m. Both the slope coefficient of the upstream side and the slope coefficient of the backside of th...

Embodiment 2

[0052] This embodiment adopts the anti-"λ" shape diversion pier structure, the structure is as follows figure 1 As shown, the difference is that no groove is provided on the top surface of the abutment dam, and the "λ"-shaped diversion abutment structure is arranged upstream of the pier 1 . The right side of the pier is the main channel, and the main channel is guided into the main channel through the diversion dam 2 and the pier dam 3 . Fish-nest bricks are used at the foot of the "λ"-shaped diversion pier structure, rockfill bottom protection is used at the head of the diversion dam, and gabion gabion is used for the rest of the dam body and revetment structure. Gabion gabion is made of low-carbon steel wire with high corrosion resistance, high strength and ductility by mechanical weaving. The angle between the diversion dam and the main flow is set at 10°, and the overall top width of the structure is 0.5m. According to the water depth of the river, the height of the stru...

Embodiment 3-1

[0061] This embodiment adopts the anti-"λ"-shaped diversion pier structure with grooves on the top of the dam, the structure is as follows figure 1 As shown, the "λ" shaped diversion pier structure is arranged upstream of the bridge pier. In the "λ" shaped diversion pier structure, the diversion dam and the pier structure are connected by a short arc, and the pier structure is arranged in an inverted "U" shape. The right side of the pier is the main channel, and the main channel is guided into the main channel through the diversion dam and the pier dam. The dam foot of the "λ"-shaped diversion pier structure is made of fish nest bricks, the groove part is reinforced with thin-layer concrete, the head of the diversion dam is protected by rockfill, and the rest of the dam body and diversion pier structures are made of Gabion gabion. Gabion gabion is made of low-carbon steel wire with high corrosion resistance, high strength and ductility by mechanical weaving. The angle betwe...

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Abstract

The ecological flow guide fender pier structure comprises a fender pier dam and a flow guide dam, the flow guide dam is located on one side of a pier on the channel side, the flow guide dam is linearly arranged in the water flow direction, an acute angle is formed between the flow guide dam and the main flow direction of water flow, and the water flow can be conveniently guided into a channel through the flow guide dam; the fender pier dam is arranged on the downstream side of the diversion dam and located on the upstream of the pier, the upstream end of the fender pier dam is connected with the middle of the diversion dam, and the downstream end of the fender pier dam is located on the side, away from the channel side, of the pier, so that the diversion dam and the fender pier dam form a protection structure on the upstream of the pier, and water flow is prevented from directly impacting the pier. The flow guide fender pier structure has a flow guide function, and can be used for deepening a navigation channel, maintaining the scale of a navigation channel, reducing the influence of a bridge on the navigation channel, improving the surrounding ecological environment and creating a good habitat for river organisms such as fishes.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and water transportation, and in particular relates to an ecological diversion pier structure for long-span wading bridges. Background technique [0002] In mountainous rivers and reservoir areas where the tail water fluctuates, due to the large slope and water level fluctuations in the river section and reservoir area, the flow velocity in the river is easily affected, resulting in erosion and erosion of bridge piers, affecting the operation safety of bridges and waterways. In order to avoid damage to the bridge piers caused by the direct impact of water flow, the bridge piers usually need to be equipped with a pier structure to reduce erosion. [0003] The traditional method is to form a static flow zone near the bridge pier by laying a traditional inverted "U"-shaped abutment structure or adopting a steel plate and concrete annular cofferdam-type abutment structure near the bridge pie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D19/02
Inventor 袁浩何小泷李铮何进朝徐礼哲胡亮亮刘冒佚孙倩周昔东冉彬君陈柏羽
Owner CHONGQING JIAOTONG UNIVERSITY
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