CN110106783B - Cable upper bridge structure and construction method - Google Patents
Cable upper bridge structure and construction method Download PDFInfo
- Publication number
- CN110106783B CN110106783B CN201910471682.7A CN201910471682A CN110106783B CN 110106783 B CN110106783 B CN 110106783B CN 201910471682 A CN201910471682 A CN 201910471682A CN 110106783 B CN110106783 B CN 110106783B
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- bridge
- steel frame
- cable
- installation
- box girder
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 167
- 239000010959 steel Substances 0.000 claims abstract description 167
- 238000009434 installation Methods 0.000 claims abstract description 92
- 239000000126 substance Substances 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 238000005246 galvanizing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- E01D19/10—Railings; Protectors against smoke or gases, e.g. of locomotives; Maintenance travellers; Fastening of pipes or cables to bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a cable upper bridge structure, which comprises a cable upper bridge steel frame and an electric power pipe ditch, wherein the cable upper bridge steel frame comprises a pier installation steel frame, a box girder installation steel frame and a guardrail installation steel frame, the pier installation steel frame is installed on one pier of a bridge through a chemical bolt, the pier installation steel frame and the pier are accepted through the same bearing platform, the box girder installation steel frame is installed on a box girder of the bridge through the chemical bolt, and the guardrail installation steel frame is installed on a guardrail of the bridge through the chemical bolt; the lower end of the box girder installation steel frame is inserted into the upper end of the bridge pier installation steel frame, and the lower end of the box girder installation steel frame can move relative to the upper end of the bridge pier installation steel frame; the power trench is disposed on a foundation. According to the invention, the cable is led to the lower part of the bridge pier through the electric power pipe trench, the bridge pier is used as a bearing carrier, the bridge pier mounting steel frame is arranged on the side surface of the bridge pier, and the cable enters the bridge through the bridge pier mounting steel frame, so that the cable is bridged, and the construction difficulty is low, the economy is good, and the construction period is short.
Description
Technical Field
The invention belongs to the field of bridges, and particularly relates to a cable bridge-mounting structure and a construction method.
Background
In the implementation process of urban rail transit, two conditions of cable need to be bridged. 1) When the main transformer station is connected to the front line station or the section is an overhead station or an overhead section, the cable must be bridged to meet the power supply requirement. 2) The waste water pump house is arranged at the place of the tunnel boundary of the overhead-to-underground bridge, the following station is arranged to meet the electricity load requirements of the waste water pump house and the fan, and the upper bridge is required to meet the electricity requirements of the water pump and the fan.
At present, common practice of cable bridging is as follows: in order to reduce the influence on urban landscapes, cables are led out from a main transformer station or along with an adopted electric power pipe trench to the lower part of a bridge, then a cable upper bridge steel frame structure with the appearance similar to that of the bridge is independently built at a certain position between two bridge piers, and the cable upper bridge steel frame structure is used as a supporting body to finish cable upper bridge. Because bridge floor in overhead section is wider, each cantilever on both sides of the steel frame sometimes reaches 4-5 m, the steel structure must meet the self strength, rigidity and stability under the working conditions of wind load, earthquake load, cable load and the like in design, meanwhile, the urban landscape requirement is considered, the structure body type often built is huge, the foundation of the cable upper bridge steel frame structure often selects an independent foundation, and sometimes even pile foundation must be adopted to meet the bearing capacity and settlement calculation requirement, thus leading to high construction difficulty and long construction period, and bringing very large workload to design and construction.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a cable bridge-mounting structure and a construction method, and the cable bridge-mounting structure is light in structure, low in construction difficulty, good in economy and short in construction period.
In order to achieve the above object, according to one aspect of the present invention, there is provided a cable upper bridge structure characterized by comprising a cable upper bridge steel frame and a power trench, wherein,
the cable upper bridge steel frame comprises bridge pier installation steel frames, box girder installation steel frames and guardrail installation steel frames, wherein the bridge pier installation steel frames are installed on one bridge pier of a bridge through chemical bolts and are installed on the outer sides of the bridge pier, the bridge pier installation steel frames and the bridge pier are supported through the same bearing platform, the box girder installation steel frames are installed on the box girders of the bridge through chemical bolts and are installed on the outer sides of the box girders, and the guardrail installation steel frames are installed on guardrails of the bridge through chemical bolts and are installed on the outer sides of the guardrails;
the upper end of the bridge pier installation steel frame is provided with an installation sleeve, the lower end of the box girder installation steel frame is inserted into the installation sleeve, the lower end of the box girder installation steel frame can move up and down relative to the installation sleeve, and a gap exists between the outer side of the lower end of the box girder installation steel frame and the inner wall of the installation sleeve so as to adapt to the deformation of a bridge;
the power trench is disposed on a foundation for laying a cable.
Preferably, the cable upper bridge steel frame is provided with two and they are arranged transversely, and the bridge is located between the two cable upper bridge steel frames.
Preferably, the electric power pipe ditch comprises a main ditch and two branch ditches, each branch ditch is connected with the main ditch respectively, one cable upper bridge steel frame is arranged above each branch ditch respectively, and the bridge pier connected with the cable upper bridge steel frame is located between the two branch ditches.
Preferably, the framework of the cable upper bridge steel frame is formed by welding square steel, and inclined support steel pipes inclined relative to the horizontal plane are arranged between the square steel.
Preferably, the outer sides of the square steel and the inclined support steel pipe are subjected to hot galvanizing treatment.
According to another aspect of the present invention, there is also provided a method for performing a bridge-on-cable construction of a bridge-on-cable structure, comprising the steps of:
1) Introducing a cable to the side surface of the pier through the power pipe trench;
2) After the cable bridge-loading steel frame is transported to the site, the positions of the guardrail mounting steel frame and the box girder mounting steel frame are adjusted on the outer side of the guardrail of the bridge and the outer side of the box girder respectively, and then the guardrail mounting steel frame and the box girder mounting steel frame are mounted on the guardrail and the box girder respectively through chemical anchor bolts;
3) The bridge pier installation steel frame is well adjusted on the outer side of the bridge pier installation steel frame of the bridge, the lower end of the box girder installation steel frame installed in the step 2) is inserted into the upper end of the bridge pier installation steel frame, the lower end of the box girder installation steel frame can move relative to the upper end of the bridge pier installation steel frame, and then the bridge pier installation steel frame is fixed on one bridge pier through a chemical anchor bolt;
4) The cable is pulled out of the power pipe ditch and led to the cable upper bridge steel frame and the bridge to be fixed, and in this way, the upper bridge construction of the cable is realized.
Preferably, after the cable is fixed, an aluminum plate can be arranged on the steel cable upper bridge steel frame.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
1) According to the invention, the cable can be led to the lower part of the corresponding bridge pier by digging the electric power trench in the foundation, then the bridge pier, the box girder and the guardrail of the bridge are used as bearing carriers, and the bridge pier mounting brackets, the box girder mounting brackets and the guardrail mounting brackets are respectively arranged on the outer sides of the bridge pier, the box girder mounting brackets and the guardrail mounting brackets, and the cable enters the viaduct girder from the upper bridge of the electric power trench through the mounting brackets, so that the cable is bridged, and the bridge crane has the advantages of light structure, low construction difficulty, good economy, short construction period and the like.
2) The lower end of the box girder installation steel frame is inserted into the installation sleeve on the bridge pier installation steel frame, and the two parts can move relatively, so that the box girder installation steel frame can be combined with an expansion joint on a bridge to adapt to deformation in the direction parallel to and perpendicular to the axis of the bridge.
Drawings
FIG. 1 is a plan view of a power duct in the present invention;
FIG. 2 is a cross-sectional view of a cable support of the present invention;
fig. 3 is a top view of a cable support according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 1 to 3, a cable upper bridge structure comprises a cable upper bridge steel frame 1 and an electric power pipe trench 2, wherein the skeleton of the cable upper bridge steel frame 1 is formed by welding square steel 101, inclined support steel pipes 102 inclined relative to the horizontal plane are arranged between the square steel 101, and the outer sides of the square steel 101 and the inclined support steel pipes 102 are subjected to hot galvanizing treatment, so that the cable upper bridge steel frame 1 has high supporting strength, and the cable upper bridge steel frame 1 is exposed in the air and can play a role of rust resistance, the inclined support steel pipes 102 can play a role of further reinforcing the skeleton of the cable upper bridge steel frame 1,
the cable upper bridge steel frame 1 comprises a bridge pier installation steel frame 11, a box girder installation steel frame 12 and a guardrail installation steel frame 13, wherein the bridge pier installation steel frame 11 is installed on one bridge pier 4 of a bridge through chemical bolts 3 and is installed against the outer side of the bridge pier 4, the bridge pier installation steel frame 11 and the bridge pier 4 are supported through the same bearing platform 7, so that the bridge pier installation steel frame 11 is supported by the original bearing platform 7, the box girder installation steel frame 12 is installed on a box girder 5 of the bridge through the chemical bolts 3 and is installed against the outer side of the box girder 5, and the guardrail installation steel frame 13 is installed on a guardrail 6 of the bridge through the chemical bolts 3 and is installed against the outer side of the guardrail 6; the bridge pier installation steel frame 11, the box girder installation steel frame 12 and the guardrail installation steel frame 13 are correspondingly installed at the position of the same bridge pier 4 of the bridge; the pier mounting steel frame 11, the box girder mounting steel frame 12 and the guardrail mounting steel frame 13 are respectively and preferably provided with pre-buried angle steels 9, and the pier mounting steel frame 11, the box girder mounting steel frame 12 and the guardrail mounting steel frame 13 are respectively mounted on the piers 4, the box girders 5 and the guardrails 6 after the chemical bolts 3 pass through the pre-buried angle steels 9; if a fracture exists between the two parts of the bridge, the rear steel plate 8 can be firstly adopted to be arranged at the fracture, and then the chemical bolts 3 sequentially penetrate through the pre-buried angle steel 9 and the rear steel plate 8 and then extend into the bridge.
The upper end of the bridge pier installation steel frame 11 is provided with an installation sleeve, the lower end of the box girder installation steel frame 12 is inserted into the installation sleeve, the lower end of the box girder installation steel frame 12 can move up and down relative to the installation sleeve, and a gap exists between the outer side of the lower end of the box girder installation steel frame 12 and the inner wall of the installation sleeve so as to adapt to the deformation of a bridge; the bridge has deformation in the directions perpendicular to the bridge axis and parallel to the bridge axis, so the bridge is provided with a bridge expansion joint to adapt to the deformation, and the lower end of the box girder installation steel frame 12 and the installation sleeve form a keel expansion joint together, so the box girder installation steel frame can be matched with the bridge expansion joint together to adapt to the bridge deformation.
The power pipe trench 2 is arranged on a foundation for arranging cables, and the cables are led out to the cable upper bridge steel frame 1 through the power pipe trench 2 and then led to a bridge.
Further, the cable upper bridge steel frames 1 are provided with two and they are arranged in a transverse direction, and the bridge is located between the two cable upper bridge steel frames 1, so that wiring can be performed from both sides of the bridge.
Further, the power pipe trench 2 includes a main trench 21 and two branch trenches 22, each branch trench 22 is connected with the main trench 21, and the cable upper bridge steel frame 1 is disposed above each branch trench 22, and the bridge pier 4 connected with the cable upper bridge steel frame 1 is located between the two branch trenches 22. By the bifurcation formed by the two branch trenches 22, one cable can be split into two, and then the cable upper bridge is realized by the cable upper bridge steel frame 1 at both sides of the bridge pier 4.
According to another aspect of the present invention, there is also provided a method for performing a bridge-on-cable construction of a bridge-on-cable structure, comprising the steps of:
1) Introducing a cable to the side of the bridge pier 4 through the power trench 2;
2) After the cable upper bridge steel frame 1 is transported to the site, the positions of the guardrail mounting steel frame 13 and the box girder mounting steel frame 12 are adjusted (pre-mounting is carried out) on the outer side of the guardrail 6 and the outer side of the box girder 5 of the bridge, and then the guardrail mounting steel frame 13 and the box girder mounting steel frame 12 are respectively mounted on the guardrail 6 and the box girder 5 through chemical anchors;
3) Adjusting the position of the bridge pier installation steel frame 11 on the outer side of the bridge pier installation steel frame 11 (pre-installation), inserting the lower end of the box girder installation steel frame 12 installed in the step 2) into the upper end of the bridge pier installation steel frame 11, enabling the lower end of the box girder installation steel frame 12 to move relative to the upper end of the bridge pier installation steel frame 11, and fixing the bridge pier installation steel frame 11 on one bridge pier 4 through a chemical anchor bolt; the bond force and the mechanical biting force between the chemical bolts 3 and the concrete are used for acting together to resist pulling and the bolts are used for resisting shearing, so that the bridge pier installation steel frame 11, the box girder installation steel frame 12 and the guardrail installation steel frame 13 can be firmly installed on a bridge;
4) The cable is pulled out of the power pipe ditch 2 and led to the cable upper bridge steel frame 1 and the bridge to be fixed, and in this way, the upper bridge construction of the cable is realized.
5) After the cable is fixed, an aluminum plate can be arranged on the steel cable upper bridge steel frame 1. The aluminum plate not only can play a certain protection role on the cable upper bridge steel frame 1, but also can be adapted to the peripheral landscape to beautify the cable upper bridge steel frame 1.
The invention uses the bridge which is already constructed as a supporting body, the cable upper bridge steel frame 1 is arranged at the outer side of the bridge, and the cable enters the viaduct from the upper bridge of the power pipe ditch 2 through the cable upper bridge steel frame 1 to complete the cable upper bridge, thereby having the advantages of low manufacturing cost, low construction difficulty, good economy, short construction period and the like.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A cable upper bridge structure is characterized by comprising a cable upper bridge steel frame and an electric power pipe ditch, wherein,
the cable upper bridge steel frame comprises bridge pier installation steel frames, box girder installation steel frames and guardrail installation steel frames, wherein the bridge pier installation steel frames are installed on one bridge pier of a bridge through chemical bolts and are installed on the outer sides of the bridge pier, the bridge pier installation steel frames and the bridge pier are supported through the same bearing platform, the box girder installation steel frames are installed on the box girders of the bridge through chemical bolts and are installed on the outer sides of the box girders, and the guardrail installation steel frames are installed on guardrails of the bridge through chemical bolts and are installed on the outer sides of the guardrails;
the upper end of the bridge pier installation steel frame is provided with an installation sleeve, the lower end of the box girder installation steel frame is inserted into the installation sleeve, the lower end of the box girder installation steel frame can move up and down relative to the installation sleeve, and a gap exists between the outer side of the lower end of the box girder installation steel frame and the inner wall of the installation sleeve so as to adapt to the deformation of a bridge;
the power trench is disposed on a foundation for laying a cable.
2. A cable upper bridge structure according to claim 1, wherein the cable upper bridge steel frames are provided in two and they are arranged in a transverse direction, and the bridge is located between the two cable upper bridge steel frames.
3. The cable upper bridge structure according to claim 2, wherein the power pipe trench comprises a main trench and two branch trenches, each branch trench is connected with the main trench, the cable upper bridge steel frame is arranged above each branch trench, and the bridge pier connected with the cable upper bridge steel frame is located between the two branch trenches.
4. The cable upper bridge structure according to claim 1, wherein the skeleton of the cable upper bridge steel frame is formed by welding square steel, and inclined support steel pipes inclined with respect to a horizontal plane are arranged between the square steel.
5. The cable upper bridge structure according to claim 4, wherein the outer sides of the square steel and the inclined support steel pipe are subjected to hot galvanizing treatment.
6. The method for carrying out the bridge construction of the cable on the bridge structure is characterized by comprising the following steps of:
1) Introducing a cable to the side surface of the pier through the power pipe trench;
2) After the cable bridge-loading steel frame is transported to the site, the positions of the guardrail mounting steel frame and the box girder mounting steel frame are adjusted on the outer side of the guardrail of the bridge and the outer side of the box girder respectively, and then the guardrail mounting steel frame and the box girder mounting steel frame are mounted on the guardrail and the box girder respectively through chemical anchor bolts;
3) The bridge pier installation steel frame is well adjusted on the outer side of the bridge pier installation steel frame of the bridge, the lower end of the box girder installation steel frame installed in the step 2) is inserted into the upper end of the bridge pier installation steel frame, the lower end of the box girder installation steel frame can move relative to the upper end of the bridge pier installation steel frame, and then the bridge pier installation steel frame is fixed on one bridge pier through a chemical anchor bolt;
4) The cable is pulled out of the power pipe ditch and led to the cable upper bridge steel frame and the bridge to be fixed, and in this way, the upper bridge construction of the cable is realized.
7. The method of claim 6, wherein after the cable is secured, an aluminum plate is provided on the steel cable bridge steel frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471682.7A CN110106783B (en) | 2019-05-31 | 2019-05-31 | Cable upper bridge structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471682.7A CN110106783B (en) | 2019-05-31 | 2019-05-31 | Cable upper bridge structure and construction method |
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| Publication Number | Publication Date |
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| CN110106783A CN110106783A (en) | 2019-08-09 |
| CN110106783B true CN110106783B (en) | 2023-12-15 |
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| CN201910471682.7A Active CN110106783B (en) | 2019-05-31 | 2019-05-31 | Cable upper bridge structure and construction method |
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| CN110106783A (en) | 2019-08-09 |
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