CN113863112A - Expansion joint-free long-connection viaduct and construction method thereof - Google Patents
Expansion joint-free long-connection viaduct and construction method thereof Download PDFInfo
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- CN113863112A CN113863112A CN202111411892.0A CN202111411892A CN113863112A CN 113863112 A CN113863112 A CN 113863112A CN 202111411892 A CN202111411892 A CN 202111411892A CN 113863112 A CN113863112 A CN 113863112A
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- bridge
- viaduct
- main bridge
- expansion joint
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- Civil Engineering (AREA)
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Abstract
The invention relates to a non-expansion joint long-connected viaduct and a construction method thereof, and the viaduct comprises a bridge deck structure and a plurality of piers, wherein the bridge deck structure comprises a main bridge and approach bridges arranged at two ends of the main bridge, the piers are arranged along the length direction of the bridge deck structure, the main bridge is connected with the approach bridges through expansion devices, the main bridge comprises a first part positioned in the middle and two second parts positioned at two ends, a third part is arranged between the first part and the second parts for connection, a fixed support is arranged between the first part and the piers, a friction pendulum seismic reduction and isolation support is arranged between the second part and the piers, and an acceleration locking support is arranged between the third part and the piers. In order to meet the requirements of hospitals, laboratories and factories of chip production on the environment, the telescopic devices are only arranged at two ends of the main bridge, the main bridge is long, the jumping vibration and noise of vehicles on the main bridge can be reduced, and the fixed support, the acceleration locking support and the friction pendulum seismic isolation support can ensure the seismic performance of the main bridge.
Description
Technical Field
The invention relates to the field of bridges, in particular to a long-joint viaduct without an expansion joint and a construction method thereof.
Background
The viaduct is an important building structure for solving the problem of urban rapid traffic, but brings continuous adverse effects of noise, vibration and the like on the environment. In hospitals, laboratories and in the vicinity of chip production factories, the noise and vibration problems of the surrounding environment need to be strictly controlled. The viaduct structure includes a main bridge and approach bridges installed at both ends, and according to the current literature, the reasons for these noises and vibrations are mainly: because the bridge is equipped with the expansion joint to install telescoping device at the expansion joint, when the driving through the expansion joint, the vehicle jumps the car and can produce noise and vibration, and the technical means that can adopt in the aspect of the bridge noise reduction damping at present is mainly to improve telescoping device domestic and outside, in order to alleviate the noise and the vibration problem at expansion joint.
However, in this kind of technical means, the problem of noise and vibration still exists in the modified telescoping device, can't satisfy the control accuracy requirement to noise and vibration of hospital, laboratory and the mill of chip production, and to the improvement cost height of telescoping device, the maintenance degree of difficulty is big moreover.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a viaduct without expansion joint and a construction method thereof, so as to solve one or more problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows:
the utility model provides a no expansion joint long ally oneself with overhead bridge, includes bridge floor structure and is used for supporting bridge floor structure's a plurality of pier, bridge floor structure includes the main bridge and sets up the bridge approach at main bridge both ends, and is a plurality of the pier is followed bridge floor structure's length direction arranges, the main bridge with it connects to be equipped with the telescoping device between the bridge approach, the main bridge is including the first portion that is located the middle part, two second parts that are located both ends, the first portion with it connects to be equipped with the third portion between the second part, the first portion with be equipped with fixing support between the pier, the second portion with it subtracts the isolation bearing to be equipped with the friction pendulum between the pier, the third portion with be equipped with acceleration locking support between the pier.
Further, the main bridge comprises a plurality of sections, and a closure part is arranged between every two adjacent sections.
Furthermore, the closure part is arranged between the two piers, and the closure part is arranged close to one pier.
Furthermore, the pier comprises a bearing platform, at least two upright columns are arranged on the top surface of the bearing platform, the top surfaces of the upright columns are abutted to the bridge deck structure through the support, and at least ten cast-in-situ bored piles are arranged on the bottom surface of the bearing platform.
Further, the length range of the closure part is 1.5 meters to 2.5 meters.
Further, the main bridge is a box girder bridge.
Furthermore, along the direction close to the ramp, the number of the boxes on the section of the main bridge is gradually increased, and the thickness of the box wall plate of the main bridge is gradually increased.
Furthermore, in the width direction of the main bridge, the thickness of the web plate of the main bridge section is gradually thickened from the middle to two sides.
A construction method of a viaduct without an expansion joint long link is suitable for the construction process of the viaduct without the expansion joint long link, and comprises the following steps:
pouring the bridge pier;
building a support structure, and pouring to form each segment;
and sequentially closing the closing parts from the middle part to the two ends of the main bridge.
Furthermore, the segments are provided with prestressed pipelines, a plurality of prestressed steel bundles are arranged in the prestressed pipelines, one ends of the prestressed steel bundles are anchored on the cross beams of the adjacent segments, and the other ends of the prestressed steel bundles are connected with the prestressed steel bundles of the adjacent segments through connectors.
Compared with the prior art, the invention has the following beneficial technical effects:
the two ends of the main bridge are connected with the approach bridge through the telescopic devices, namely, no expansion joint and telescopic devices are arranged on the main bridge, and meanwhile, the main bridge is long and long, so that the two ends of the main bridge are avoided from being close to factories of hospitals, laboratories and chip production. In addition, the main bridge is divided into a first part, a second part and a third part, a fixed support is arranged between the first part and the bridge pier, a friction pendulum seismic mitigation and isolation support is arranged between the second part and the bridge pier, an acceleration locking support is arranged between the third part and the bridge pier, the fixed support can lock the first part of the bridge, and the middle part of the bridge is prevented from shifting or vibrating; the acceleration locking support can generate displacement under the normal condition, the deformation of the bridge to the temperature and the shrinkage creep condition is met, when the earthquake working condition occurs, the acceleration locking support can be changed into a fixed support, the bridge piers of the support bear the earthquake force together, the safety of the bridge under the earthquake action is ensured, and the friction pendulum seismic reduction and isolation support can consume the earthquake energy through swinging when the earthquake acts, so that the stability of the main bridge is ensured. To sum up, only set up the telescoping device at the both ends of main axle in this scheme, and set up fixing support, acceleration locking support and friction pendulum and subtract isolation bearing, alleviate the vibration and the noise problem at main axle middle part, improve the stability and the anti-seismic performance of main axle, satisfy near the requirement to the environment of mill of hospital, laboratory and chip production.
And (II) the top surface of the bearing platform is provided with two upright columns, and the bearing platform is abutted to the bridge deck structure through the two upright columns, so that the stability of the bridge deck structure can be improved, and the vibration of the bridge deck structure is reduced.
And thirdly, along the direction close to the ramp, the main bridge needs to be widened, so that the number of the boxes is increased, the thickness of the box wall plate of the main bridge is increased, the strength of the main bridge can be improved, and the strength requirement of the joint of the main bridge and the ramp is met.
And (IV) dividing the main bridge into a plurality of parts, pouring each part independently, and closing each part in sequence from the middle part to the two ends of the main bridge.
Drawings
FIG. 1 is a schematic diagram showing the matching among a main bridge, an approach bridge and a pier in the embodiment of the invention;
FIG. 2 is a schematic structural diagram of a bridge pier according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a main bridge cross section in an embodiment of the invention;
fig. 4 shows a schematic arrangement of the pedestals in the embodiment of the present invention.
In the drawings, the reference numbers:
1. a main bridge; 11. a segment; 12. a cabinet; 2. bridge approach; 21. a telescoping device; 3. a bearing platform; 31. a column; 311. a friction pendulum vibration reduction and isolation support; 312. an acceleration lock support; 313. a fixed support; 32. drilling a cast-in-place pile; 34. and (5) temporarily upsetting.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following will explain in detail a viaduct without an expansion joint and a construction method thereof according to the present invention with reference to the accompanying drawings and the following detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.
Examples
Referring to fig. 1 to 4, the present application provides a non-expansion-joint overpass, which includes a bridge deck structure and a plurality of piers for supporting the bridge deck structure, wherein the piers are arranged along a length direction of the bridge deck structure. The bridge deck structure comprises a main bridge 1 and approach bridges 2 arranged at two ends of the main bridge 1, the length of the main bridge 1 can reach 800-900 meters, telescopic devices 21 are arranged between two ends of the main bridge 1 and the two approach bridges 2 to be connected, a support is arranged between each pier and the main bridge 1, and the main bridge 1 is supported by the supports. When the viaduct bridge is designed, due to the fact that the main bridge 1 is long in connection length, the two ends of the main bridge can be kept away from the places near a factory where hospitals, laboratories and chips are produced, the telescopic device 1 is not arranged on the main bridge any longer, and the jumping vibration and noise of vehicles on the main bridge can be reduced when the vehicles pass through.
In this embodiment, the expansion device 21 is an RBKF480 type expansion device. The main bridge 1 has 21 spans in total, the number of the piers for supporting the main bridge 1 is 22, and the piers are numbered as 1, 2, 3, 4 and 5. The main bridge 1 comprises a first part positioned in the middle and two second parts positioned at two ends, and a third part is arranged between the first part and the two second parts for connection. Correspondingly, the top surfaces of the piers numbered 1 to 4 and the piers numbered 20 to 22 are provided with friction pendulum seismic isolation and reduction support seats 311, and the two second parts are respectively supported by the friction pendulum seismic isolation and reduction support seats 311; the bridge piers numbered 5 to 12 and the top surfaces of the bridge piers numbered 14 to 19 are provided with acceleration lock abutments 312, and support two third portions through the acceleration lock abutments 312, respectively; the pier top surface numbered 13 is mounted with a fixing support 313, and supports the first portion by the fixing support 313.
Referring to fig. 1, further, the main bridge 1 includes 6 segments 11, which are respectively segmented at the 4 th, 8 th, 12 th, 16 th and 20 th spans, and a closure portion is formed between two adjacent segments 11. Closure portion sets up between two piers, and in addition, every closure portion all is close to a pier setting, and the length range reservation of closure portion is 1.5 meters to 2.5 meters, and in this embodiment, the length of closure portion is 2 meters.
Referring to fig. 2, the pier includes a bearing platform 3 arranged along a horizontal direction, at least two columns 31 are integrally cast on a top surface of the bearing platform 3, a distance between the two columns 31 is 10.4 meters, a support is installed on a top surface of each column 31, the top surface of each column 31 abuts against a cross beam of a bridge deck structure through the support, at least ten cast-in-situ bored piles 32 are arranged on a bottom surface of the bearing platform 3, in this embodiment, the number of the columns 31 is selected according to a bridge width, two columns 31 are cast on the piers numbered 1 to 18, four columns 31 are cast on the piers numbered 19 to 22, and the number of the cast-in-situ bored piles 32 is twelve.
Referring to fig. 1 to 3, further, the main bridge 1 is a box girder bridge. Along the direction close to the ramp, the number of the boxes 12 on the section of the main bridge 1 is gradually increased, and the thickness of the wall plates of the boxes 12 of the main bridge 1 is gradually increased. The bridge width of the main bridge 1 from the 16 th span to the 21 st span is widened from 33 meters to 51.87 meters in order to connect the upper ramp and the lower ramp. In order to adapt to the bridge width change, the standard section of the main bridge 1 is gradually changed from a single box 5 chamber to a single box 7 chamber, and the box chamber 12 change is completed in the 17 th span. The top and bottom plates of the box chamber 12 from the 17 th span to the 19 th span are thickened to 28 cm, and the width of the web plate is 50 cm; the 20 th to 21 st span is thickened to 28 cm at the top plate and the bottom plate is thickened to 26 cm.
Further, the web thickness of the cross section of the main bridge 1 becomes gradually thicker from the middle to both sides in the width direction of the main bridge 1. In the embodiment, the width of the No. 1 span to the No. 15 span bridge is 33 meters, the height of the standard beam is 2.5 meters, the cross section of a single box 5 chamber is adopted, the thickness of a top plate is 25 centimeters, the thickness of a bottom plate is 22 centimeters, the width of a web plate is 50 centimeters, the width of the web plate at the end part is widened to 75 centimeters, and the cantilever is 3.5 meters.
Referring to fig. 1 to 4, the present application further discloses a construction method of a viaduct without an expansion joint, which is suitable for the construction process of the viaduct without an expansion joint, and includes:
s1, pouring piers;
s2, erecting a support structure and pouring to form each segment 11;
and S3, sequentially closing the closing parts from the middle part to the two ends of the main bridge 1.
In step S2, a prestressed pipeline is reserved when each segment 11 is poured, in the closing process of step S3, a prestressed steel strand is first arranged in the prestressed pipeline, each closing portion is arranged close to one pier, that is, close to one cross beam of the main bridge 1, one end of the prestressed steel strand located in the closing portion is tensioned and anchored on the adjacent cross beam, and the other end of the prestressed steel strand passes through the closing portion and is connected with the adjacent prestressed steel strand through a connector.
Specifically, in step S2, when each segment 11 is poured, both ends of the segment 11 extend out of the bridge pier and are suspended, and since the closure portion is disposed near one bridge pier, the distance that one end of the segment 11 extends out of the bridge pier is long, because the temporary pier 34 is required to be disposed to support the end of the segment 11 that extends out of the bridge pier for the safety of construction.
Specifically, the closing parts among the six segments 11 are sequentially named as a first closing part, a second closing part, a third closing part, a fourth closing part and a fifth closing part, and then in step S3, closing the closing parts sequentially from the middle to both ends of the main bridge 1 means that the closing process is performed on the third closing part first, then the closing process is performed on the second closing part and the fourth closing part, and finally the closing process is performed on the first closing part and the fifth closing part.
The working principle is as follows:
in this scheme, not set up expansion joint and telescoping device 21 on main axle 1, can alleviate the vibration in the middle part of main axle 1 when the driving passes through. In addition, the fixed support 313 can lock the first part of the bridge, so that the middle part of the bridge is prevented from shifting or vibrating; when the acceleration locking support 312 is subjected to the action of an earthquake, the acceleration locking support can be converted into the action of the fixed support 313, the earthquake resistance of the main bridge 1 is improved, and the friction pendulum seismic isolation support 311 can enable the main bridge 1 and the bridge pier to slide relatively when accidents such as the earthquake occur, the earthquake energy is consumed, and the stability of the main bridge 1 is ensured. In conclusion, in the scheme, the telescopic devices 21 are only arranged at the two ends of the main bridge 1, and the fixed support 313, the acceleration locking support 312 and the friction pendulum seismic isolation and reduction support 311 are arranged to reduce the problems of vibration and noise in the middle of the main bridge 1, improve the seismic performance of the main bridge 1, and meet the requirements of hospitals, laboratories and factories of chip production on the environment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a no expansion joint long ally oneself with viaduct, includes bridge floor structure and is used for supporting bridge floor structure's a plurality of pier, bridge floor structure includes the main bridge and sets up the approach bridge at main bridge both ends is a plurality of the pier is followed bridge floor structure's length direction arranges its characterized in that: the main bridge with be equipped with the telescoping device between the approach bridge and connect, the main bridge is including the first portion that is located the middle part, two second portions that are located both ends, the first portion with be equipped with the third portion between the second portion and connect, the first portion with be equipped with fixing support between the pier, the second portion with be equipped with the friction pendulum between the pier and subtract isolation bearing, the third portion with be equipped with acceleration locking support between the pier.
2. The viaduct without expansion joint according to claim 1, wherein: the main bridge comprises a plurality of sections, and a closure part is arranged between every two adjacent sections.
3. The viaduct without expansion joint according to claim 2, wherein: the closure part is arranged between the two piers, and the closure part is arranged close to one pier.
4. The viaduct without expansion joint according to claim 2, wherein: the bridge pier comprises a bearing platform, at least two upright columns are arranged on the top surface of the bearing platform, the top surfaces of the upright columns are abutted to the bridge deck structure through the support, and at least ten cast-in-situ bored piles are arranged on the bottom surface of the bearing platform.
5. The viaduct without expansion joint according to claim 2, wherein: the length range of the closure part is 1.5 m to 2.5 m.
6. The viaduct without expansion joint according to claim 2, wherein: the main bridge is a box girder bridge.
7. The viaduct without expansion joint according to claim 6, wherein: along the direction close to the ramp, the number of the boxes on the section of the main bridge is gradually increased, and the thickness of the box wall plate of the main bridge is gradually increased.
8. The viaduct without expansion joint according to claim 6, wherein: in the width direction of the main bridge, the thickness of the web plate of the main bridge section is gradually thickened from the middle to two sides.
9. A construction method of a long-joint viaduct without expansion joints is characterized in that: the construction process of the expansion joint-free viaduct bridge as claimed in any one of claims 2 to 8, comprising:
pouring the bridge pier;
building a support structure, and pouring to form each segment;
and sequentially closing the closing parts from the middle part to the two ends of the main bridge.
10. The construction method of the viaduct without the expansion joint according to claim 9, wherein: the segments are provided with prestressed pipelines, a plurality of prestressed steel bundles are arranged in the prestressed pipelines, one ends of the prestressed steel bundles are anchored on the cross beams of the adjacent segments, and the other ends of the prestressed steel bundles are connected with the prestressed steel bundles of the adjacent segments through connectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111411892.0A CN113863112A (en) | 2021-11-25 | 2021-11-25 | Expansion joint-free long-connection viaduct and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111411892.0A CN113863112A (en) | 2021-11-25 | 2021-11-25 | Expansion joint-free long-connection viaduct and construction method thereof |
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