CN211973074U

CN211973074U - Stable bridge

Info

Publication number: CN211973074U
Application number: CN201922239022.4U
Authority: CN
Inventors: 颜苓; 郭宏灿; 赖戈铭; 何德华; 陈建宁; 郭一贤; 郭畅; 陈衡; 赵海凝; 杨奇; 布振华
Original assignee: Guangzhou Third Municipal Engineering Co Ltd
Current assignee: Guangzhou Third Municipal Engineering Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-11-20
Anticipated expiration: 2029-12-13

Abstract

The utility model provides a firm bridge, which relates to the technical field of bridge construction, and comprises a bridge pier and a bridge floor formed by sequentially splicing a first beam body and a second beam body, wherein the bridge pier is arranged at the splicing part of the first beam body and the second beam body, and bridge abutments are erected at two ends of the bridge floor; the pier includes bent cap and the pile foundation that inserts the soil layer, the bent cap is located the pile foundation up end, the up end of bent cap includes: the first step surface and the second step surface are staggered up and down, and two adjacent piers are symmetrically arranged; and two ends of the first beam body are erected on the first step surfaces of the capping beams of the two adjacent piers, and two ends of the second beam body are erected on the second step surfaces of the capping beams of the two adjacent piers. The utility model provides an among the bridge, the first roof beam body and the horizontal effort that the second roof beam body received can be offset effectively to pier and abutment.

Description

Stable bridge

Technical Field

The utility model relates to a bridge construction technical field, concretely relates to firm bridge.

Background

The bridge deck of the bridge is formed by splicing a plurality of beam bodies, and is provided with piers and abutment platforms for supporting the beam bodies.

When the bridge works normally, vehicles running on the bridge generate a horizontal acting force on the beam body, the horizontal acting force can cause the bridge deck to be subjected to a transverse acting force and loose, and even the bridge deck is separated from piers or bridge abutments, so that the bridge collapses.

In the existing design, the horizontal acting force is converted into acting force on the bridge abutment and the bridge pier so as to eliminate the horizontal acting force, and the mode depends on the fixed structure of the bridge abutment and the bridge abutments on two sides, so that the horizontal acting force cannot be effectively eliminated.

SUMMERY OF THE UTILITY MODEL

To the above technical problem, the utility model aims at providing a firm bridge that can effectively eliminate this horizontal effort.

In order to solve the above technical problem, the embodiment of the utility model provides an adopt following technical scheme to realize:

the utility model provides a stable bridge, which comprises a bridge pier and a bridge floor formed by splicing a first beam body and a second beam body in sequence, wherein the bridge pier is arranged at the splicing part of the first beam body and the second beam body, and bridge abutments are erected at two ends of the bridge floor; pier top is equipped with the bent cap, and the below is equipped with the pile foundation that inserts the soil layer, the bent cap is located the up end of pier, the up end of bent cap includes: the bent bridge comprises a first step surface and a second step surface which are staggered up and down, and bent caps above two adjacent piers are symmetrically arranged; and two ends of the first beam body are erected on the first step surfaces of the capping beams of the two adjacent piers, and two ends of the second beam body are erected on the second step surfaces of the capping beams of the two adjacent piers.

Advantageously or exemplarily, a reinforcing structure is included, the reinforcing structure comprising: and the reinforcing members are fixedly connected between two adjacent cover beams through connecting pieces and/or between the cover beams and the bridge abutment.

Advantageously or exemplarily, the connection is a Z-piece comprising: a first horizontal section, a second horizontal section and a vertical section; the first horizontal section of the Z-shaped part is hung on the cover beam or the bridge abutment, and the vertical section of the Z-shaped part is abutted against the side face of the cover beam or the bridge abutment; wherein, the first horizontal section is pressed against the upper end surface of the cover beam or the bridge abutment 13 by the first beam body or the second beam body; the reinforcing member is arranged on the second horizontal sections of the two Z-shaped members between the two adjacent cover beams, and/or the reinforcing member is arranged on the second horizontal sections of the two Z-shaped members between the two adjacent cover beams and the abutment, and two end surfaces of the reinforcing member can be respectively abutted against the vertical sections of the Z-shaped members opposite to the two end surfaces.

Advantageously or exemplarily, the reinforcing structure further comprises: and the cushion block is arranged between the first horizontal section and the first beam body or the second beam body.

Advantageously or exemplarily, the method further comprises a first support arranged on the soil layer around the pile foundation and a second support arranged on the soil layer below the abutment.

Advantageously or exemplarily, the first support comprises a jet grouting pile and the second support comprises a cured layer.

Beneficially or exemplarily, the jet grouting pile is a three-pipe high-pressure jet grouting pile with the diameter of 600@400, and is distributed in the soil layer within the range of 2-3 m from the center of the pile foundation, and the depth of the three-pipe high-pressure jet grouting pile is not more than 5 m.

The utility model discloses a various embodiments have following beneficial effect do:

1. the utility model provides an among the bridge, the first roof beam body and the horizontal effort that the second roof beam body received can be offset effectively to pier and abutment.

2. The utility model provides an among the bridge, set up reinforced structure, wherein the reinforcement will act on the horizontal effort of first roof beam body and the second roof beam body and spread out to each pier and abutment through reinforced structure on, can eliminate the horizontal effort on the bridge effectively, prevent to take place the skew as pier and abutment, ensured the structure safety and the operation safety of bridge.

3. The utility model provides an among the bridge, first supporting consolidates pile foundation below soil horizon, and the second is strutted and is consolidated the processing to abutment below soil horizon, improves the compressibility and the bearing capacity on soil layer, reduces the uneven settlement of ground, struts the abutment pier, further improves the stability of abutment and pier, ensures that the bridge can normal operating.

Drawings

The present invention is further explained by using the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention, and for those skilled in the art, other drawings can be obtained according to the following drawings without any inventive work.

Fig. 1 is a plan view of a stabilized bridge and its reinforcing structure according to an exemplary embodiment of the present invention;

FIG. 2 is a first schematic illustration of a stabilized bridge according to an exemplary embodiment of the present invention;

FIG. 3 is a second schematic support view of a stabilized bridge according to an exemplary embodiment of the present invention;

FIG. 4 is a top sectional view of a first support of a stabilized bridge according to an exemplary embodiment of the present invention;

fig. 5 is a step diagram of reinforcing the soil layer below the pile foundation according to the reinforcing method for a bridge according to an exemplary embodiment of the present invention.

Reference numerals: 11-a first step surface; 12-second step surface; 13-abutment; 14-bridge pier; 15-pile foundation; 16-a capping beam; 21-a first beam; 22-a second beam; 3-a reinforcement; 4-Z-shaped piece; 41-a first horizontal segment; 42-a second horizontal segment; 43-vertical section; 5, cushion blocks; 6-first supporting; 7-second supporting; 8-the earth's surface.

Detailed Description

The invention will be further described with reference to the following examples in conjunction with the accompanying drawings.

As shown in fig. 1 to 5, a first aspect of the embodiment of the present invention provides a stable bridge, including a bridge pier 14 and a bridge deck formed by sequentially splicing a first beam 21 and a second beam 22, wherein the bridge pier 14 is arranged at the splicing position of the first beam 21 and the second beam 22, and bridge abutments 13 are erected at two ends of the bridge deck; pier 14 top is equipped with bent cap 16, and the below is equipped with the pile foundation 15 that inserts the soil layer, bent cap 16 is located 14 up end of pier, bent cap 16's up end includes: the first step surface 11 and the second step surface 12 are staggered up and down, and the bent caps 16 above two adjacent piers 14 are symmetrically arranged; both ends of the first beam 21 are bridged on the first step surfaces 11 of the capping beams 16 of the two adjacent piers 14, and both ends of the second beam 22 are bridged on the second step surfaces 12 of the capping beams 16 of the two adjacent piers 14.

This embodiment is through the structure that sets up the pier, can further improve the steadiness of bridge, specifically embodies: when the first or

second girder

21 or 22 receives a horizontal force, the horizontal force is converted into a vertical surface at a height difference between the first and

second step surfaces

11 and 12 of the capping beam 16, that is, the horizontal force to the first or

second girder

21 or 22 is converted into a lateral force to the capping beam 16, and further, the lateral force is absorbed by the fixed structure of the pier 14. Through the above process, the horizontal force applied to the first beam body 21 or the second beam body 22 can be effectively offset.

Specifically, as shown in fig. 1:

in one case, when the first beam 21 is subjected to a horizontal leftward or rightward force, the force causes the second beam 22 adjacent to the first beam 21 to be subjected to the same force, and further, the force is applied to the vertical plane at the level difference between the first step surface 11 and the second step surface 12 of the capping beam 16, so that the horizontal force is converted into a lateral force applied to the pier 14.

In another case, when the second beam 22 is subjected to a horizontal leftward or rightward force, the same is true as above.

In the above manner, the horizontal acting force applied to the bridge deck is finally converted into the acting force applied to the abutment 13 or the pier 14, however, the manner of counteracting the horizontal acting force depends on the fixing structure of the abutment 13 and the pier 14 and the splicing structure between the first beam body 21 and the second beam body 22, and if the fixing structure of the abutment 13 and the pier 14 is not firm, it is difficult to completely counteract the horizontal acting force, which may cause the displacement of the abutment 13 or the pier 14 or the collapse of the bridge caused by the separation of the first beam body 21 or the second beam body 22 from the pier 14. Therefore, the embodiment of the present invention further improves the above-mentioned bridge, as follows:

a firm bridge comprises a reinforcing structure, and is used for reducing the influence of horizontal acting force on the bridge deck, and the influence of the horizontal acting force on the bridge can be further reduced.

In one embodiment, a reinforcement structure comprises: a plurality of stiffeners 3; the reinforcement 3 is secured between two adjacent capping beams 16 by a connector, and in one embodiment the reinforcement 3 is also provided between adjacent capping beams 16 and the abutment 13. The reinforcing members 3 serve to convert the horizontal force into a force against the respective pier 14.

The reinforcing structure of the present embodiment is provided with the reinforcing member 3, and the horizontal acting force acting on the first beam 21 or the second beam 22 is spread to each of the piers 14 and the abutments 13 on both sides through the reinforcing structure, so that the horizontal acting force of the bridge floor can be effectively eliminated, the occurrence of deviation as the piers 14 and the abutments 13 is prevented, and the structural safety and the operational safety of the bridge are ensured.

In one embodiment, the reinforcement 3 comprises a flexible reinforcement, to which the horizontal forces can be further distributed, but in a manner that does not significantly fix the bridge pier 14 and the abutment 13. As a preferred embodiment, the reinforcement 3 comprises a rigid reinforcement, such as a steel reinforcement, which ensures a counteracting effect against horizontal forces and provides a good fixation of the pier 14 and abutment 13.

In one embodiment, the stiffener 3 is configured to: phi is 300mm, t is 10mm, each first beam body 21 or second beam body 22 is correspondingly provided with a plurality of reinforcing members 3, and the distance between the reinforcing members 3 corresponding to the same first beam body 21 or second beam body 22 is 4 m.

In one embodiment, a vertical column is set up, standing on the ground and supporting the reinforcement 3. The setting of stand can hold up reinforcement 3, and when 14 and abutment 13 mutual distance were far away, played good supporting role, avoided reinforcement 3 unstable.

In one embodiment, the connection is a Z-shaped piece 4 comprising: a first horizontal section 41, a second horizontal section 42 and a vertical section 43; the first horizontal section 41 of the Z-shaped element is suspended from the opposite cover beam 16 or bridge abutment 13, and the vertical section 43 of the Z-shaped element 4 rests on the opposite side of the cover beam 16 or bridge abutment 13; the first horizontal section 41 is pressed against the upper end face of the opposite cover beam 16 or bridge abutment 13 by the first beam body 21 or the second beam body 22; the reinforcement 3 is placed on the second horizontal sections 42 of the two Z-profiles between two adjacent cover beams 16, and/or the reinforcement 3 is placed on the second horizontal sections 42 of the two Z-profiles between two adjacent cover beams 16 and the abutment 13, and it is ensured that two end faces of the reinforcement 3 can respectively abut on the vertical sections 43 of the Z-profiles 4 opposite to the two end faces.

The present embodiment selects the Z-shaped member 4 as the connecting member, and the first beam body 21 or the second beam body 22 presses on the Z-shaped member 4, on one hand, to help to fix the reinforcing member 3; on the other hand, in the case of the first beam body 21 or the second beam body 22, a part of the horizontal force can be converted into a force acting on the reinforcement 3 by the Z-shaped member 4.

In one embodiment, the Z-profiles 4 are Z-sheet steel.

In one embodiment, the reinforcement structure further comprises a spacer 5, the spacer 5 being arranged between the first horizontal section 41 and the first beam 21 or the second beam 22.

In one embodiment, when the Z-shaped member 4 is selected as the connecting member, the spacer 5 is provided on the upper end surface of the first horizontal section 41; in a further embodiment, two spacers 5 are provided, respectively on the upper end surface of the first horizontal section 41 and the lower end surface of the first horizontal section 41. In another embodiment, the spacer 5 is provided on the lower end surface of the first horizontal section 41. In another embodiment, the spacer 5 is fixedly attached to the first horizontal section 41.

The provision of the connecting member and the spacer 5 helps stabilize the connection of the reinforcing member 3 to prevent the falling off. In one case, as shown in fig. 1 to 3, when the second beam 22 is subjected to a horizontal force to the right, on the one hand, the horizontal force applies a pressure to the pier at the right end of the second beam 22, and on the other hand, the tendency of the second beam 22 to move to the right causes the pad 5 to be subjected to a static friction force to the right, which is converted into a force to the reinforcement 3 to the right through the connection member.

That is, by the arrangement of the spacer 5 and the connecting member, a part of the horizontal force applied to the first beam 21 or the second beam 22 is directly converted into a force applied to the pier 14 and the abutment 13.

In one embodiment, a stable bridge further comprises a first support 6 disposed on a soil layer surrounding the pile foundation 15 and a second support 7 disposed on a soil layer below the abutment 14, wherein the first support 6 and the second support 7 are configured to improve stability of the abutment 13 and the pier 14.

In this embodiment, the first support 6 reinforces a soil layer around the pile foundation 15, and the second support 7 reinforces a soil layer below the abutment 13, so that the compressibility and the bearing capacity of the soil layer are improved, uneven settlement of the foundation is reduced, the abutment 13 and the pier 14 are supported, the stability of the abutment 13 and the pier 14 is further improved, and the normal operation of the bridge is ensured.

In one embodiment, the first support 6 is reinforced with MJS grouting.

In the embodiment, the MJS grouting reinforcement is a novel construction method, which has good reinforcement effect but high cost.

In another embodiment, the first struts 6 comprise jet grouting piles and the second struts 7 comprise cured layers.

In the embodiment, the first support 6 is a rotary jet grouting pile, so that the cost is reduced compared with the MJS grouting reinforcement method.

In one embodiment, the jet grouting pile is a three-pipe high-pressure jet grouting pile, is configured to be phi 600@400 and is distributed in the soil layer within 2m from the center of the pile foundation 15, and the depth of the three-pipe high-pressure jet grouting pile is not more than 5 m. The embodiment of the utility model provides a second aspect provides a reinforcement method of bridge, the bridge includes the abutment 13 of both sides to and locate both sides a plurality of piers 14 between the

abutment

13, 14 below of pier are equipped with the pile foundation 15 that inserts the soil layer, reinforcement method includes: and reinforcing soil layers around the pile foundation 15 and reinforcing soil layers below the abutment 13.

Wherein, consolidate the peripheral soil layer of pile foundation 15 and include:

step 1, defining a construction area around the bridge pier 14, and dividing the construction area into a plurality of sub-areas; in one embodiment, in step 1, the construction area comprises: a square area with the side length of 2-3 m and taking the bridge pier 14 as the center.

And 2, sequentially grouting and reinforcing the sub-area to form a first support 6.

Wherein, to 13 below soil horizon reinforcement include: and (3) grouting and reinforcing the soil layer below the bridge abutment 13 to form a second support 7.

The bridge pier 14 is arranged on a bearing platform, and the part of the bearing platform inserted into the soil layer is a pile foundation 15.

The reinforcing method of the bridge provided by the embodiment is used for reinforcing soil layers around the bridge abutment 13 and the pile foundation 15, wherein compared with a one-time excavation mode in the prior art, the reinforcing method of the soil layers around the pile foundation 15 is used for excavation construction in time-sharing and regional areas, only one regional soil layer is reinforced in the same time period, and on one hand, the influence on the pile foundation 15 can be reduced; on the other hand, the influence on the normal operation of the bridge is reduced, and the method can be suitable for the operating bridge. Meanwhile, the formed first support 6 and the second support 7 can also improve the stability of the bridge substructure. The bridge substructure includes a bridge abutment 13, a bridge pier 14, and a pile foundation 15.

In one embodiment, the first support 6 is reinforced with MJS grouting.

In one embodiment, the first struts 6 comprise jet grouting piles and the second struts 7 comprise cured layers.

In one embodiment, the jet grouting pile is a three-pipe high-pressure jet grouting pile, is configured to be 600mm @400mm, and has a depth not exceeding 5 m; the solidified layer is formed by grouting and reinforcing sleeve valve pipes.

In one embodiment, the second support 7 is formed by grouting and reinforcing the sleeve valve pipe, and specifically comprises: drilling a hole in the soil layer below the bridge abutment 14, inserting the sleeve valve pipe into the hole, injecting the prepared slurry into the hole through the sleeve valve pipe, after grouting is completed, pulling out the sleeve valve pipe, and sealing the hole. The drilling position is changed, and the above process is carried out for a plurality of times to form a solidified layer.

In one embodiment, the construction area is divided into four sub-areas with the horizontal line and the vertical line by dividing the center of the pier 14, and soil around the pile foundation 15 is constructed and reinforced in a time period with less traffic on the bridge.

According to the bridge reinforcing method provided by the embodiment, soil layers around the pile foundation 15 are reinforced in time-sharing and regional modes, and only one regional soil layer is reinforced in the same time period, so that the influence on the pile foundation 15 can be reduced; on the other hand, the influence on the normal operation of the bridge is reduced, and the method can be suitable for the operating bridge. And, because the regional go on, single construction cycle is shorter, can adjust the engineering time according to the operation condition flexibility of bridge.

In an embodiment, utilize the utility model discloses the reinforcing method that the second aspect provided consolidates the bridge, this bridge includes the utility model discloses pile foundation, bridge floor and the reinforced structure of bridge that the first aspect provided, reinforced structure still includes sets up above-mentioned reinforcement 3, connecting piece and cushion 5 to pier 14, abutment 13 further consolidate to the bridge.

In one embodiment, the method further comprises the step of arranging high-pressure jet grouting pile brace reinforcement on the ground surface 8 between two adjacent piers 14 and the ground surface 8 between the piers 14 and the abutment 13.

It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A stable bridge is characterized by comprising bridge piers and a bridge floor formed by sequentially splicing a first beam body and a second beam body, wherein the bridge piers are arranged at the splicing positions of the first beam body and the second beam body, and bridge abutments are erected at two ends of the bridge floor;

pier top is equipped with the bent cap, and the below is equipped with the pile foundation that inserts the soil layer, the bent cap is located the up end of pier, the up end of bent cap includes: the bent bridge comprises a first step surface and a second step surface which are staggered up and down, and bent caps above two adjacent piers are symmetrically arranged;

and two ends of the first beam body are erected on the first step surfaces of the capping beams of the two adjacent piers, and two ends of the second beam body are erected on the second step surfaces of the capping beams of the two adjacent piers.

2. A stabilized bridge according to claim 1, comprising a reinforcing structure, said reinforcing structure comprising: and the reinforcing members are fixedly connected between two adjacent cover beams through connecting pieces and/or between the cover beams and the bridge abutment.

3. A stabilized bridge according to claim 2, characterized in that said connecting elements are Z-shaped elements comprising: a first horizontal section, a second horizontal section and a vertical section;

the first horizontal section of the Z-shaped part is hung on the cover beam or the bridge abutment, and the vertical section of the Z-shaped part is abutted against the side face of the cover beam or the bridge abutment; the first horizontal section is pressed on the upper end face of the cover beam or the bridge abutment by a first beam body or a second beam body;

the reinforcing member is arranged on the second horizontal sections of the two Z-shaped members between the two adjacent cover beams, and/or the reinforcing member is arranged on the second horizontal sections of the two Z-shaped members between the two adjacent cover beams and the abutment, and two end surfaces of the reinforcing member can be respectively abutted against the vertical sections of the Z-shaped members opposite to the two end surfaces.

4. A stabilized bridge according to claim 3, wherein said reinforcing structure further comprises: and the cushion block is arranged between the first horizontal section and the first beam body or the second beam body.

5. A stabilized bridge according to claim 1, further comprising a first support in the soil surrounding said pile foundation and a second support in the soil below said abutment.

6. A stabilized bridge according to claim 5, wherein said first bracing comprises a jet grouting pile and said second bracing comprises a cured layer.

7. A stable bridge according to claim 6, wherein the jet grouting piles are three-pipe high-pressure jet grouting piles, are configured as phi 600@400, are distributed in the soil layer within the range of 2-3 m from the center of the pile foundation, and have the depth of not more than 5 m.