CN110241715B

CN110241715B - Bridge pier protector

Info

Publication number: CN110241715B
Application number: CN201910635678.XA
Authority: CN
Inventors: 田美灵; 孙宇飞; 李宇轩; 王晋宝
Original assignee: Zhejiang Ocean University ZJOU
Current assignee: Zhejiang Ocean University ZJOU
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2020-09-18
Anticipated expiration: 2039-07-15
Also published as: CN110241715A

Abstract

A bridge pier protecting device is characterized in that an upper scour prevention mechanism and a lower scour prevention mechanism are arranged on a pier body; the upper anti-scouring mechanism comprises a spiral diversion trench and a detachable anti-scouring ring, the anti-scouring ring comprises a ring body, a bottom embedded block, a top baffle and a connecting plate, the lower anti-scouring mechanism comprises a bottom support, a protective net, small stone blocks, large stone blocks and sandbags, the anti-scouring ring with the top baffle is adopted by the upper anti-scouring mechanism, effective anti-scouring can be carried out on river surface waves, and the upper end of the pier body is prevented from being beaten and impacted by the river surface waves; scour prevention mechanism adopts protection network and bottom support down, forms a plurality of scour prevention cavitys, avoids in the scour prevention cavity, and stone and sand bag run off, and the top is along the rivers of water conservancy diversion groove motion decurrent and bottom erode rivers and get into the scour prevention cavity, through the layer upon layer setting of protection network, big stone, little stone and sand bag, rivers impulsive force reduces greatly, does not constitute the injury to the pier body, reaches the purpose that slows down the erodeing.

Description

Bridge pier protector

Technical Field

The invention relates to a bridge pier protection device.

Background

Local surface scour (local surface pier) refers to scour caused by strong eddies generated around the pier by water flow due to obstruction of the pier. For the sake of calculation, it is assumed that the local flush of the pier is performed on the basis of the completion of the general flush. The local scouring is influenced by factors such as water flow state, pier shape, bed sand composition, river bed shape and the like.

At present, aiming at the problem of bridge pier scouring, half of technicians in the related field adopt the following scheme: (1) increase pier bottom width or diameter, lifting strength, however, so, the bottom receives rivers to erode for a long time, can arouse that local position receives the erosion, and the whole atress of pier is uneven, produces the crack easily, has the potential safety hazard. (2) The stone or the sand bag are piled up around the pier, the situation is feasible for the river with slow flow rate, but the faster the flow rate of the river is, the greater the impact force of the water flow is, the stone and the sand bag around can be easily washed away, and the use efficiency is not high.

Disclosure of Invention

Aiming at the problems, the invention provides a bridge pier protection device.

The specific technical scheme is as follows:

a bridge pier protection device comprises a pier body; the pier is characterized in that an upper anti-scouring mechanism is arranged at the top of the pier body, and a lower anti-scouring mechanism is arranged at the bottom of the pier body;

the upper anti-scouring mechanism comprises a spiral diversion trench and a detachable anti-scouring ring, the spiral diversion trench is a square groove and is spirally distributed from top to bottom around the top of the pier body;

the anti-impact ring comprises a ring body, a bottom embedded block, a top baffle and a connecting plate, wherein the ring body is of a spiral structure, the ring body, the bottom embedded block and the top baffle are of an integrated structure, the bottom embedded block is of a long strip shape, the size and the shape of the bottom embedded block correspond to those of the spiral diversion groove, and when the anti-impact ring is used, the bottom embedded block is embedded into the spiral diversion groove; the top baffle is obliquely arranged on the outer side of the top of the ring body; the two ends of the ring body are distributed up and down, one side of each of the two ends of the ring body is provided with a threaded counter bore, the two ends of the connecting plate are respectively provided with a threaded through hole, and the threaded through holes correspond to the threaded counter bores in position; when the connecting ring is used, the connecting plate is positioned at one side of the two ends of the ring body and is fixed with the threaded counter bore by a bolt penetrating through the threaded through hole, so that the two ends of the ring body are fixed;

the lower anti-scouring mechanism comprises a bottom bracket, a protective net, small stone blocks, large stone blocks and a sand bag; the number of the bottom supports is 6, the bottom supports are uniformly distributed around the bottom of the pier body, and the bottom supports are fixedly connected with the pier body; the protective net cover is in the top and all around of bottom support, the protection network forms an anti-scour cavity with between two adjacent bottom supports, inside top-down of anti-scour cavity fills little stone, sand bag and big stone in proper order.

Further, the bottom support is one of a right-angled triangle plate body, a rectangular plate body, a square plate body and a right-angled trapezoid plate body.

Further, the bottom support is a right-angle trapezoidal plate body.

Furthermore, the bottom support is of a structure with a wide upper part and a narrow lower part, and one side of a right-angle edge of the bottom support is fixedly connected with the pier body.

Further, the volume and mass of the large stone block are larger than those of the small stone block.

Further, the bottom support is a high-strength steel plate.

Furthermore, an anti-corrosion waterproof coating is coated outside the bottom support.

Furthermore, the protective net is a steel wire net, and the surface of the protective net is coated with an anticorrosive waterproof coating.

Furthermore, the connection part of the protective net and the bottom bracket is fixedly connected in a welding mode.

Furthermore, the connecting plate is of a square plate structure.

Compared with the prior art, the invention has the beneficial effects that:

(1) the upper anti-scouring mechanism adopts an anti-scouring ring with a top baffle plate, so that river surface waves can be effectively prevented from being scoured, and the upper end of the pier body is prevented from being beaten and impacted by the river surface waves; after the top baffle guides waves downwards, the spiral guide grooves also have a guiding effect on water flow, and the water flow moves along the guide grooves to avoid directly impacting the pier body. The anti-impact ring design of spiral type can accomplish vertical direction location on the pier very much, avoids the impact of rivers too big to cause the anti-impact ring to shift up, uses reliably.

(2) Scour prevention mechanism adopts protection network and bottom support down, forms a plurality of scour prevention cavitys, avoids in the scour prevention cavity, and stone and sand bag run off, and the top is along the rivers of water conservancy diversion groove motion decurrent and bottom erode rivers and get into the scour prevention cavity, through the layer upon layer setting of protection network, big stone, little stone and sand bag, rivers impulsive force reduces greatly, does not constitute the injury to the pier body, reaches the purpose that slows down the erodeing.

Drawings

FIG. 1 is a schematic view of a pier body provided with a bottom bracket and an upper scour prevention mechanism according to the present invention;

FIG. 2 is a top view of the pier capturing body without a guard ring;

FIG. 3 is a schematic sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of the connection between the two ends of the guard ring and the connecting plate according to the present invention.

Reference numerals

Pier body 1, go up scour prevention mechanism 2, spiral type guiding gutter 21, scour prevention ring 22, ring body 221, bottom abaculus 222, top baffle 223, connecting plate 224, scour prevention mechanism 3 down, bottom support 31, protection network 32, little stone 33, big stone 34, sand bag 35, screw through-hole 4, screw counter bore 5, bolt 6, scour prevention cavity 7.

Detailed Description

In order to make the technical scheme of the invention clearer and clearer, the invention is further described with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent replacement and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.

As shown in the figure, the bridge pier protection device comprises a pier body; the top of the pier body is provided with an upper scour prevention mechanism, and the bottom of the pier body is provided with a lower scour prevention mechanism;

the anti-impact ring comprises a ring body, a bottom embedded block, a top baffle and a connecting plate, wherein the connecting plate is of a square plate body structure, the ring body is of a spiral structure, the ring body, the bottom embedded block and the top baffle are of an integrated structure, the bottom embedded block is of a long strip shape, the size and the shape of the bottom embedded block correspond to those of the spiral diversion groove, and when the anti-impact ring is used, the bottom embedded block is embedded into the spiral diversion groove; the top baffle is obliquely arranged on the outer side of the top of the ring body; the two ends of the ring body are distributed up and down, one side of each of the two ends of the ring body is provided with a threaded counter bore, the two ends of the connecting plate are respectively provided with a threaded through hole, and the threaded through holes correspond to the threaded counter bores in position; when the connecting ring is used, the connecting plate is positioned at one side of the two ends of the ring body and is fixed with the threaded counter bore by a bolt penetrating through the threaded through hole, so that the two ends of the ring body are fixed;

the lower anti-scouring mechanism comprises a bottom bracket, a protective net, small stone blocks, large stone blocks and a sand bag; wherein: the bottom support is a right-angle trapezoidal plate body and is a high-strength steel plate, the bottom support is of a structure with a wide upper part and a narrow lower part, one side of a right-angle side of the bottom support is fixedly connected with the pier body, and an anti-corrosion waterproof coating is coated outside the bottom support; in addition, the volume and the mass of the large stone blocks are larger than those of the small stone blocks; furthermore, the protective net is a steel wire net, the surface of the protective net is coated with an anticorrosive waterproof coating, the connecting part of the protective net and the bottom support is fixedly connected in a welding mode, the number of the bottom supports is 6, the bottom supports are uniformly distributed around the bottom of the pier body, and the bottom supports are fixedly connected with the pier body; the protective net cover is in the top and all around of bottom support, the protection network forms an anti-scour cavity between with two adjacent bottom supports, the inside top-down of anti-scour cavity fills a plurality of little stones, a plurality of sand bags and a plurality of big stone in proper order.

Claims

1. A bridge pier protection device comprises a pier body; the pier is characterized in that an upper anti-scouring mechanism is arranged at the top of the pier body, and a lower anti-scouring mechanism is arranged at the bottom of the pier body;

2. A bridge pier protecting device according to claim 1, wherein the bottom bracket is one of a right-angled triangular plate, a rectangular plate, a square plate, and a right-angled trapezoidal plate.

3. The bridge pier protecting device of claim 1, wherein the bottom support is a structure with a wide top and a narrow bottom, and one side of a right-angle edge of the bottom support is fixedly connected with the pier body.

4. A bridge pier protecting device according to any one of claims 1 to 3, wherein the connection between the protective net and the bottom bracket is fixedly connected by welding.