CN114277683B - Large-gradient long-cantilever bridge deck pavement structure - Google Patents
Large-gradient long-cantilever bridge deck pavement structure Download PDFInfo
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- CN114277683B CN114277683B CN202111395219.2A CN202111395219A CN114277683B CN 114277683 B CN114277683 B CN 114277683B CN 202111395219 A CN202111395219 A CN 202111395219A CN 114277683 B CN114277683 B CN 114277683B
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 40
- 238000005452 bending Methods 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 7
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
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Abstract
The invention discloses a large-gradient long-cantilever bridge deck pavement structure, which comprises a cantilever, a supporting pier and a cantilever vertical beam positioned in the middle of a bridge; each group of lacing wire mechanism at least comprises two lacing wires; the cantilever and the supporting pier are provided with a first reinforcing structure on one side, and the supporting pier and the cantilever are provided with a second reinforcing structure on one side; a plurality of reinforcing pieces are distributed between the first reinforcing structure and the second reinforcing structure along the direction perpendicular to the first reinforcing structure and the second reinforcing structure, and the plurality of reinforcing pieces are distributed on the matching surface of the cantilever and the supporting pier in a dot matrix mode. According to the cantilever and the cantilever vertical beam, two lacing wires are designed at each stretching point of the cantilever and the cantilever vertical beam, and the connection with the cantilever is realized through the lacing wire connecting piece, so that the structural stability is good, the number of the lacing wires is twice that of the existing lacing wires, and the stability of cantilever support is also improved; the connection strength of the cantilever and the supporting pier is improved in a steel plate and concrete mode, the stability of the long cantilever bridge deck is further improved, and the construction is convenient.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a large-gradient long-cantilever bridge deck pavement structure.
Background
The cantilever bridge (cantilever beam bridge) refers to a bridge with a simple beam freely suspended outwards at one or both ends as the main bearing member of the upper structure.
Cantilever bridge construction structures in the prior art are generally divided into two types, namely cantilever pouring and cantilever splicing, wherein one end of a cantilever is connected with a foundation, and the other end of the cantilever extends to a cantilever vertical beam and is connected with the cantilever vertical beam through a lacing wire. Cantilever bridge floor among the prior art is because the traditional lacing wire of design is only single-point connection, in order to be able to improve structural strength and security, needs many stretching wires along cantilever length direction to improve the support stability of cantilever. Meanwhile, in order to ensure the support stability of the cantilever bridge deck and the lower support pier, a plurality of support piers are arranged at intervals at the bottom of the cantilever bridge deck, but the support piers and the cantilever bridge deck are connected in the current stage only through a concrete pouring mode except for necessary reinforcing steel bars, but the support stability is not satisfied for the bridge deck with a certain gradient, and the service life of the bridge deck is easily influenced.
Therefore, based on the above technical problems, those skilled in the art need to develop a bridge deck pavement structure with a large gradient and a long cantilever to improve the structural stability of the bridge deck.
Disclosure of Invention
The invention aims to provide a large-gradient long-cantilever bridge deck pavement structure which is novel in structure, high in stability and convenient to construct.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention relates to a large-gradient long-cantilever bridge deck pavement structure, which comprises the following components:
a cantilever;
a plurality of support piers which are supported at the bottom of the cantilever and distributed at intervals; and
the cantilever vertical beam is positioned in the middle of the bridge;
one end of the cantilever extends to the end part of the bridge and is connected with the cantilever foundation at the position, and the other end of the cantilever extends obliquely towards the cantilever vertical beam and is connected with the cantilever vertical beam through a plurality of groups of lacing wire mechanisms so as to keep the position of the cantilever;
each group of lacing wire mechanisms at least comprises two lacing wires;
the cantilever is provided with a first reinforcing structure on the side matched with the supporting pier, and a second reinforcing structure on the side matched with the supporting pier;
a plurality of reinforcing pieces are distributed between the first reinforcing structure and the second reinforcing structure along the direction perpendicular to the first reinforcing structure and the second reinforcing structure, and the reinforcing pieces are distributed on the matching surfaces of the cantilever and the supporting pier in a dot matrix mode.
Further, the cantilever foundation is arranged at the end part of the bridge, the cantilever foundation comprises a metal frame and a plurality of reinforcing ribs which are distributed in the metal frame at intervals, and the space between the metal frame and the reinforcing ribs is poured through concrete;
the lower part of the reinforcing rib is anchored into the ground to realize the connection of the cantilever foundation and the ground.
Further, a plurality of groups of lacing wire connecting pieces are arranged at intervals along the extending direction of the cantilever;
each group of lacing wire connecting pieces comprises two lacing wire connecting pieces symmetrically arranged along the width direction of the cantilever;
each lacing wire connecting piece is connected with two lacing wires.
Further, the lacing wire connector is configured as a bending structure;
the lacing wire connecting piece includes:
a first body extending along an upper surface of the cantilever; and
a second body extending along a side of the cantilever;
the first body and the second body are integrally formed, and the joint of the first body and the second body is in transitional connection through an arc surface;
the first body is connected with the cantilever through a plurality of riveting pieces, and the second body is connected with the cantilever through a plurality of riveting pieces;
the middle part of the first body is provided with a first lacing wire connecting part perpendicular to the first body, and the middle part of the second body is provided with a second lacing wire connecting part perpendicular to the second body;
the two lacing wires correspond to one lacing wire connecting part respectively;
the lacing wire connected to the first lacing wire connecting part extends towards the cantilever vertical beam;
the lacing wire connected to the second lacing wire connecting part is contacted with the surface of the arc surface so as to extend towards the cantilever vertical beam.
Further, the bottom of the cantilever is formed as a cantilever engagement portion engaged with the support pier;
the cantilever matching part comprises a cantilever matching part metal frame, the side, facing the support pier, of the cantilever matching part metal frame is a cantilever bottom plate, and the side, far away from the support pier, of the cantilever matching part metal frame is a cantilever top plate;
the circumference of the cantilever matching part metal frame is a cantilever side plate connected with the cantilever bottom plate and the cantilever top plate;
a plurality of steel bars are distributed in the cantilever matching part metal frame and are formed by concrete pouring;
one end of the supporting pier, which is matched with the cantilever, is provided with a supporting pier top plate;
the cantilever bottom plate of the cantilever is connected with the supporting pier top plate through the steel bars, and the gap is poured through concrete;
the cantilever matching part metal frame is of the first reinforcing structure, and the supporting pier top plate is of the second reinforcing structure.
Further, the steel bars are fixedly connected with the cantilever bottom plate and the steel bars are fixedly connected with the support pier top plate through fasteners;
the fastener is a metal sleeve sleeved and fixedly connected to the steel bar, and the joint of the metal sleeve and the steel bar and the joint of the metal sleeve and the corresponding metal plate are welded and fixed.
In the technical scheme, the large-gradient long-cantilever bridge deck pavement structure provided by the invention has the following beneficial effects:
according to the cantilever and the cantilever vertical beam, two lacing wires are designed at each stretching point of the cantilever and the cantilever vertical beam, and the connection with the cantilever is realized through the lacing wire connecting piece, so that the structural stability is good, the number of the lacing wires is twice that of the existing lacing wires, and the stability of cantilever support is also improved; the connection strength of the cantilever and the supporting pier is improved in a steel plate and concrete mode, the stability of the long cantilever bridge deck is further improved, and the construction is convenient.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic structural diagram of a large-gradient long-cantilever bridge deck pavement structure according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of a cantilever foundation of a large-gradient long-cantilever bridge deck pavement structure according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a lacing wire mechanism of a large-gradient long-cantilever bridge deck pavement structure according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a connection structure between a cantilever and a supporting pier of a large-gradient long-cantilever bridge deck pavement structure according to an embodiment of the present invention.
Reference numerals illustrate:
1. a cantilever; 2. a cantilever vertical beam; 3. a cantilever base; 4. supporting piers; 5. a lacing wire mechanism;
101. a cantilever engagement portion; 102. a cantilever base plate; 103. a cantilever top plate; 104. cantilever side plates; 105. reinforcing steel bars;
301. a metal frame; 302. reinforcing ribs;
401. supporting a pier top plate;
501. a first body; 502. a second body; 503. a first tie bar connection part; 504. a second tie bar connection part; 505. and (5) lacing wires.
Detailed Description
In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.
See fig. 1-4;
the embodiment discloses long cantilever bridge deck pavement structure of heavy grade, this structure includes:
a cantilever 1;
a plurality of support piers 4 which are supported at the bottom of the cantilever 1 and are distributed at intervals; and
the cantilever vertical beam 2 is positioned in the middle of the bridge;
one end of the cantilever 1 extends to the end part of the bridge and is connected with the cantilever foundation 3 at the position, and the other end of the cantilever 1 extends obliquely towards the cantilever vertical beam 2 and is connected with the cantilever vertical beam 2 through a plurality of groups of lacing wire mechanisms 5 so as to maintain the position of the cantilever 1;
each group of lacing wire mechanisms 5 comprises at least two lacing wires 505;
the cantilever 1 is provided with a first reinforcing structure on the side matched with the supporting pier 4, and a second reinforcing structure is provided on the side matched with the supporting pier 4;
a plurality of reinforcing pieces are distributed between the first reinforcing structure and the second reinforcing structure along the direction vertical to the first reinforcing structure and the second reinforcing structure, and the plurality of reinforcing pieces are distributed on the matching surfaces of the cantilever 1 and the supporting pier 4 in a dot matrix mode.
Specifically, this embodiment discloses a bridge deck pavement structure suitable for heavy grade, long cantilever, and it includes cantilever 1 and supports many supporting pier 4 in cantilever 1 bottom, according to the slope of cantilever 1 and the corresponding support length requirement, designs the length of supporting pier 4 to in order to improve the intensity that supporting pier 4 supported cantilever 1, designed foretell first additional strengthening and second additional strengthening between cantilever 1 and supporting pier 4. Meanwhile, in order to strengthen the connection between the cantilever 1 and the cantilever vertical beam 2, two tie bars 505 are designed at each stretching point, and of course, there may be more than two tie bars, which will not be described herein. The construction structure effectively improves the structural stability of the cantilever bridge deck from the aspect of connection between the cantilever 1 and the supporting pier 4 and the aspect of connection between the cantilever 1 and the cantilever vertical beam 2, and is convenient to construct.
Preferably, the end of the bridge of the present embodiment has a cantilever foundation 3, and the cantilever foundation 3 includes a metal frame 301, and a plurality of reinforcing ribs 302 distributed in the metal frame 301 at intervals, and the space between the metal frame 301 and the reinforcing ribs 302 is poured by concrete;
the lower portion of the stiffener 302 is anchored into the ground to effect connection of the cantilever foundation 3 to the ground.
Wherein, a plurality of groups of lacing wire connecting pieces are arranged at intervals along the extending direction of the cantilever 1;
each group of lacing wire connecting pieces comprises two lacing wire connecting pieces symmetrically arranged along the width direction of the cantilever 1;
two tie bars 505 are connected to each tie bar connector.
Further, it is:
the lacing wire connecting piece of the embodiment is configured into a bending structure;
the lacing wire connecting piece includes:
a first body 501 extending along the upper surface of the cantilever 1; and
a second body 502 extending along a side of the cantilever 1;
the first body 501 and the second body 502 are integrally formed, and the joint of the first body 501 and the second body 502 is in transitional connection through an arc surface;
the first body 501 is connected to the cantilever 1 by a plurality of rivets, and the second body 502 is connected to the cantilever 1 by a plurality of rivets;
the middle part of the first body 501 is provided with a first lacing wire connecting part 503 perpendicular to the first body 501, and the middle part of the second body 502 is provided with a second lacing wire connecting part 504 perpendicular to the second body 502;
two lacing wires 505 respectively correspond to one lacing wire connecting part;
the tie bar 505 connected to the first tie bar connection part 503 extends toward the cantilever vertical beam 2;
the tie bar 505 connected to the second tie bar connection portion 504 contacts the surface of the circular arc surface to extend toward the cantilever vertical beam 2.
Firstly, in this embodiment, tie bar connectors are symmetrically disposed on two sides of the cantilever 1, and the tie bar connectors are in a bending structure, and have the first body 501 and the second body 502, which can be formed by bending angle steel or steel plate, when angle steel is used, the corner needs to be processed into a round corner structure, and the bent steel plate also processes the corner through a corner rounding mode. In addition, in order to improve the connection stability between the tie bar connecting piece and the cantilever 1, the connection is realized by using the riveting pieces distributed in a lattice manner, and the riveting effect is good, and meanwhile, the first tie bar connecting portion 503 and the second tie bar connecting portion 504 of the embodiment also need to be partially anchored into the cantilever 1 and correspondingly stretch the tie bar 505, so that the connection of the stretching points can be realized from two directions.
Preferably, the bottom of the cantilever 1 of the present embodiment is formed as a cantilever engagement portion 101 engaged with the support pier 4;
the cantilever matching part 101 comprises a cantilever matching part metal frame, wherein the cantilever bottom plate 102 is arranged on the side, facing the support pier, of the cantilever matching part metal frame, and the cantilever top plate 103 is arranged on the side, far away from the support pier 4, of the cantilever matching part metal frame;
the circumference of the cantilever matching part metal frame is a cantilever side plate 104 connected with the cantilever bottom plate 102 and the cantilever top plate 103;
a plurality of steel bars 105 are distributed in the cantilever matching part metal frame and are formed by concrete pouring;
the end of the support pier 4 matched with the cantilever 1 is provided with a support pier top plate 401;
the cantilever bottom plate 102 of the cantilever 1 is connected with the supporting pier top plate 401 through the steel bar 105, and the gap is poured through concrete;
the cantilever mating portion metal frame is a first reinforcing structure and the support pier top 401 is a second reinforcing structure.
The steel bar 105 is fastened and connected with the cantilever bottom plate 102 and the steel bar 105 is fastened and connected with the support pier top plate 401 through fasteners;
the fastener is a metal sleeve sleeved and fixedly connected on the steel bar 105, and the joint of the metal sleeve and the steel bar 105 and the joint of the metal sleeve and the corresponding metal plate are welded and fixed.
The connection stability of the cantilever 1 and the support pier 4 is improved in a mode of combining the steel plate, the steel bar 105 and the concrete, the construction cost is not greatly improved, but the structural stability is greatly improved, the structural stability of the bridge deck support can be greatly improved, and meanwhile, the steel plate can bear larger stress.
In the technical scheme, the large-gradient long-cantilever bridge deck pavement structure provided by the invention has the following beneficial effects:
according to the cantilever 1 and the cantilever vertical beam 2 of the structure, two lacing wires 505 are designed at each stretching point, the connection with the cantilever 1 is realized through lacing wire connecting pieces, the structural stability is good, the number of the lacing wires 505 is twice that of the prior art, and the support stability of the cantilever 1 is also improved; the connection strength of the cantilever 1 and the supporting pier 4 is improved in a steel plate and concrete mode, the stability of the long cantilever bridge deck is further improved, and the construction is convenient.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that modifications may be made to the described embodiments in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature and not as restrictive of the scope of the invention, which is defined by the appended claims.
Claims (4)
1. Large-gradient long cantilever bridge deck pavement structure, its characterized in that, this structure includes:
a cantilever (1);
a plurality of supporting piers (4) which are supported at the bottom of the cantilever (1) and are distributed at intervals; and
the cantilever vertical beam (2) is positioned in the middle of the bridge;
one end of the cantilever (1) extends to the end part of the bridge and is connected with the cantilever foundation (3) at the position, and the other end of the cantilever (1) extends obliquely towards the cantilever vertical beam (2) and is connected with the cantilever vertical beam (2) through a plurality of groups of lacing wire mechanisms (5) so as to maintain the position of the cantilever (1);
each group of lacing wire mechanisms (5) at least comprises two lacing wires (505);
a first reinforcing structure is arranged on one side of the cantilever (1) matched with the supporting pier (4), and a second reinforcing structure is arranged on one side of the supporting pier (4) matched with the cantilever (1);
a plurality of reinforcing pieces are distributed between the first reinforcing structure and the second reinforcing structure along the direction perpendicular to the first reinforcing structure and the second reinforcing structure, and the plurality of reinforcing pieces are distributed on the matching surfaces of the cantilever (1) and the supporting pier (4) in a dot matrix manner;
a plurality of groups of lacing wire connecting pieces are arranged at intervals along the extending direction of the cantilever (1);
each group of lacing wire connecting pieces comprises two lacing wire connecting pieces symmetrically arranged along the width direction of the cantilever (1);
each lacing wire connecting piece is connected with two lacing wires (505);
the lacing wire connecting piece is configured into a bending structure;
the lacing wire connecting piece includes:
a first body (501) extending along the upper surface of the cantilever (1); and
-a second body (502) extending along a side of the cantilever (1);
the first body (501) and the second body (502) are integrally formed, and the joint of the first body (501) and the second body (502) is in transitional connection through an arc surface;
the first body (501) is connected with the cantilever (1) through a plurality of riveting pieces, and the second body (502) is connected with the cantilever (1) through a plurality of riveting pieces;
the middle part of the first body (501) is provided with a first lacing wire connecting part (503) perpendicular to the first body (501), and the middle part of the second body (502) is provided with a second lacing wire connecting part (504) perpendicular to the second body (502);
the two lacing wires (505) respectively correspond to one lacing wire connecting part;
-said lacing wire (505) connected to said first lacing wire connection (503) extends towards said cantilever beam (2);
the tie bar (505) connected to the second tie bar connecting portion (504) is in contact with the surface of the circular arc surface so as to extend toward the cantilever standing beam (2).
2. The long-gradient cantilever deck pavement structure according to claim 1, wherein the end of the bridge is provided with the cantilever foundation (3), the cantilever foundation (3) comprises a metal frame (301) and a plurality of reinforcing ribs (302) which are distributed in the metal frame (301) at intervals, and the space between the metal frame (301) and the reinforcing ribs (302) is poured by concrete;
the lower part of the reinforcing rib (302) is anchored into the ground to realize the connection of the cantilever foundation (3) and the ground.
3. The long-gradient cantilever deck pavement structure according to claim 1, characterized in that the bottom of the cantilever (1) is formed as a cantilever engagement portion (101) engaging with the support pier (4);
the cantilever matching part (101) comprises a cantilever matching part metal frame, wherein the cantilever bottom plate (102) is arranged on one side of the cantilever matching part metal frame, which faces the supporting pier (4), and the cantilever top plate (103) is arranged on one side of the cantilever matching part metal frame, which is far away from the supporting pier (4);
the circumference of the cantilever matching part metal frame is a cantilever side plate (104) connected with the cantilever bottom plate (102) and the cantilever top plate (103);
a plurality of steel bars (105) are distributed in the cantilever matching part metal frame and are formed by concrete pouring;
one end of the supporting pier (4) matched with the cantilever (1) is provided with a supporting pier top plate (401);
the cantilever bottom plate (102) of the cantilever (1) is connected with the supporting pier top plate (401) through the steel bars (105), and the gap is poured through concrete;
the cantilever matching part metal frame is of the first reinforcing structure, and the supporting pier top plate (401) is of the second reinforcing structure.
4. A long cantilever bridge deck pavement structure with a large gradient according to claim 3, wherein the steel bars (105) are fastened and connected with the cantilever bottom plate (102) and the steel bars (105) are fastened and connected with the supporting pier top plate (401) through fasteners;
the fastener is a metal sleeve sleeved and fixedly connected to the steel bar (105), and the joint of the metal sleeve and the steel bar (105) and the joint of the metal sleeve and the corresponding metal plate are welded and fixed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395219.2A CN114277683B (en) | 2021-11-23 | 2021-11-23 | Large-gradient long-cantilever bridge deck pavement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111395219.2A CN114277683B (en) | 2021-11-23 | 2021-11-23 | Large-gradient long-cantilever bridge deck pavement structure |
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| CN114277683A CN114277683A (en) | 2022-04-05 |
| CN114277683B true CN114277683B (en) | 2024-03-19 |
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| CN210621476U (en) * | 2019-07-12 | 2020-05-26 | 上海城建市政工程（集团）有限公司 | Segment prefabricated bent cap cantilever assembling construction device |
| CN113494055A (en) * | 2021-08-10 | 2021-10-12 | 中建市政工程有限公司 | Double-locking structure for closure section of long-span bridge and construction method |
| KR102312616B1 (en) * | 2021-07-01 | 2021-10-15 | 한국건설기술연구원 | System and Method for Monitoring Bridge Cable |
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2021
- 2021-11-23 CN CN202111395219.2A patent/CN114277683B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013007635A1 (en) * | 2013-05-21 | 2014-11-27 | Peter Wagner | Cable-stayed bridge with hybrid stiffening beam |
| CN203729193U (en) * | 2014-01-26 | 2014-07-23 | 长安大学 | Low tower stay cable reinforced T-type rigid framework system with suspension beams |
| CN206971094U (en) * | 2017-05-12 | 2018-02-06 | 中国建筑第八工程局有限公司 | A kind of reinforcement system of T-shaped rigid frame bridge |
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| CN114277683A (en) | 2022-04-05 |
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