Pier local scouring protection device with rotary normal curved surface

A protection device and bridge pier technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of poor protection effect, inability to effectively resist the catastrophic marine environment of typhoon storm surge, and high cost of protection measures

Inactive Publication Date: 2021-01-01
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some existing protection measures have disadvantages such as high cost and poor protection effect, or cannot effectively resist typhoon storm surges and other disastrous marine environments

Method used

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  • Pier local scouring protection device with rotary normal curved surface
  • Pier local scouring protection device with rotary normal curved surface
  • Pier local scouring protection device with rotary normal curved surface

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Embodiment Construction

[0018] The purpose and effects of the present invention will become clearer by describing the present invention in detail according to the accompanying drawings and preferred embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] Such as figure 2 and 3 as shown, figure 2 is the side view of the rotated normal surface around the pier, image 3 It is a three-dimensional view of the rotating normal curved surface protection device. The partial erosion protection device of the bridge pier with the rotating normal curved surface of the present invention is sleeved on the bridge pier, and its shape is approximately bell-shaped. The intersection point between the center of the pier and the unwashed riverbed is the origin, along the direction of the water flow is the positive direction of the x-axis, the upward direction of the pier axis is the positive directio...

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Abstract

The invention discloses a pier local scouring protection device with a rotary normal curved surface. The protection device is sleeved on a pier and is approximately in a bell shape, the thickness of the protection device is 0.5-1 m, and the inner surface of the protection device meets an equation of a standard rotary normal curved surface. The protection device is combined with the reciprocating flow characteristic, front impact water flow can be dispersed, the protection device is lifted away from the periphery of the pier in the tangential direction of a convex surface, and water flow impactis reduced; on the other hand, downward scouring water flow can be guided, downward scouring continues to be carried out, the direct scouring effect of the downward scouring water flow on a bed surface is weakened at the position farther away from the pier along the concave surface, and part of front impact water flow can be counteracted; and meanwhile, horseshoe vortexes around the pier are reduced, scouring of the horseshoe vortexes to a pier riverbed is weakened, and meanwhile the stress influence on the pier is small.

Description

technical field [0001] The invention belongs to the field of bridge pier protection, in particular to a partial scour protection device for a bridge pier with a rotating normal curved surface. Background technique [0002] The local scour around the bridge pier has a great impact on the safety of the bridge foundation and is the main cause of bridge damage. Bridge collapses caused by local scour around piers accounted for more than half of the total. Therefore, it is very important to provide reasonable and sufficient protection for the local scour of bridge piers. [0003] The reasons for the erosion of the water flow around the piers can be divided into three parts: (1) Concentration of forward water flow, which mainly means that when the forward water flow encounters obstacles, due to the decrease of the cross-sectional area and the increase of the cross-sectional flow velocity, the rolling sediment forms scour (2) The descending water scours the bottom, which mainly re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/26E01D19/02
CPCE01D19/02E02B3/26Y02A30/30
Inventor 孙志林董海洋陈范君
Owner ZHEJIANG UNIV
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