CN112609586A - Synchronous construction method for steel box girder self-anchoring suspension bridge tower girder - Google Patents
Synchronous construction method for steel box girder self-anchoring suspension bridge tower girder Download PDFInfo
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- CN112609586A CN112609586A CN202011506889.2A CN202011506889A CN112609586A CN 112609586 A CN112609586 A CN 112609586A CN 202011506889 A CN202011506889 A CN 202011506889A CN 112609586 A CN112609586 A CN 112609586A
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- box girder
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling 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
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension 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
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses a synchronous construction method of a tower beam of a steel box girder self-anchoring suspension bridge, which is characterized in that the construction of a bridge tower and a main beam is synchronously carried out, and the method comprises the following steps of 1, erecting a steel trestle, and then constructing a foundation below the bridge tower, constructing side piers and steel box girder pushing temporary piers; step 2, assembling a steel box girder forming a main girder on the assembling platform, installing a pushing guide beam, and constructing a tower column under a bridge tower and a tower column cantilever beam; step 3, gradually performing steel box girder pushing construction in turns, and simultaneously performing bridge tower column and connecting beam construction; step 4, after the steel box girder is pushed in place, construction of the steel box girder embedding section is carried out in turns, and meanwhile, the bridge tower is continuously constructed until the construction is finished; and 5, constructing the main cable, the sling and the auxiliary facilities until the bridge construction is finished. The construction progress can be remarkably accelerated, so that the construction period is greatly shortened.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a synchronous construction method for a tower beam of a steel box beam self-anchoring suspension bridge.
Background
The suspension bridge is the bridge type structure with the largest spanning capability at present. The traditional ground anchor type suspension bridge generally needs to build a large-size anchor to anchor a main cable, and if the main cable is directly anchored on a stiffening beam in a proper mode, the expensive anchor can be cancelled, so that the traditional ground anchor type suspension bridge evolves into a self-anchored suspension bridge. The self-anchored suspension bridge cancels a huge main cable anchorage, not only can save the cost for constructing the anchorage, but also greatly reduces the requirement on geological conditions and effectively expands the application range of the suspension bridge.
The self-anchored suspension bridge is composed of a main beam, a bridge tower, a cable system and an anchoring system, wherein the main cable is anchored at two ends of the main beam, a sling is pulled, and the main beam is bent to form a self-balanced cable support structure system.
At present, for self-anchored suspension bridges, the traditional construction method is adopted for the construction methods of the bridge tower and the main beam, namely, the main beam is generally constructed firstly and then the bridge tower is constructed, or the bridge tower is constructed firstly and then the main beam is constructed, namely, the construction mode of firstly constructing the bridge tower and then constructing the main beam or firstly constructing the bridge tower and then constructing the bridge tower is adopted, so that the construction period of the bridge is long.
Disclosure of Invention
The invention aims to solve the technical problem of providing a synchronous construction method for a tower beam of a steel box girder self-anchoring suspension bridge, which can remarkably accelerate the construction progress and greatly shorten the construction period.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a synchronous construction method for a tower beam of a steel box girder self-anchoring suspension bridge is characterized in that the construction of a bridge tower and a main beam is carried out synchronously, and comprises the following steps:
step 1, erecting a steel trestle, and then constructing a foundation below a bridge tower, constructing side piers and pushing temporary piers by a steel box girder;
step 2, assembling the steel box girder forming the main girder on an assembling platform formed by pushing the temporary piers by the steel box girder, installing a pushing guide beam, and constructing a tower column under the bridge tower and a tower column cantilever beam;
step 4, after the steel box girder is pushed in place, construction of the steel box girder embedding section is carried out in turns, and meanwhile, the bridge tower is continuously constructed until the construction is finished;
and 5, constructing the main cable, the sling and the auxiliary facilities until the bridge construction is finished.
In the above technical scheme, in the step 2, the whole steel box girder is divided into two independent steel box girders which are symmetrical along the longitudinal center line of the bridge and assembled, a gap of the steel box girder embedding section is reserved between the two steel box girders, and the width of the steel box girder embedding section is slightly larger than the transverse width of the bridge tower.
In the above technical scheme, in the step 3, a walking type pushing device is adopted for pushing the steel box girder, and the walking type pushing device has the adjusting capability in three directions of vertical, horizontal and horizontal pushing.
In the technical scheme, in the step 3, the bridge tower is formed by butt joint of a plurality of bridge tower sections which are connected end to end in the vertical direction, and the plurality of bridge tower sections are lifted to a designed position by utilizing a tower crane from a gap reserved in the middle of the framing steel box girder.
In the above technical scheme, in the step 3, the same bridge tower is composed of a front bridge tower column and a rear bridge tower column which are symmetrically arranged along a vertical center line, and a connecting beam is arranged between the front bridge tower column and the rear bridge tower column.
In the above technical scheme, in the step 3, the front and rear bridge tower columns are both composed of bridge tower segments; and each bridge tower segment and the connecting cross beam are lifted to a designed position by utilizing a clearance reserved in the middle of the framing steel box girder of the tower crane to be installed.
In the above technical solution, in the step 3, a plurality of connecting beams are arranged at intervals between the front and rear two bridge towers along the vertical direction.
In the above technical scheme, in step 3, the front and rear two bridge towers are arc-shaped columns with the middle parts expanded outwards and the tops contracted outwards, a plurality of connecting beams are arranged between the two arc-shaped columns, and the length of the connecting beam from the middle part to the bottom and the length of the beam from the middle part to the top are both progressively reduced.
In the above technical scheme, in the step 3, a plurality of pylons distributed along the main beam are constructed simultaneously.
In the technical scheme, in the step 4, after the steel box girder is pushed in place, the tower crane is used for assisting with an automobile crane and a flat car to carry out the construction of the steel box girder embedding section.
Therefore, the invention discloses a synchronous construction method for a steel box girder self-anchoring suspension bridge tower girder, which has the following beneficial effects compared with the prior art: because the bridge tower and the main beam are constructed synchronously, the limitation of the traditional construction method of firstly constructing the beam and then constructing the tower or firstly constructing the tower and then constructing the beam is effectively solved, the construction progress is obviously accelerated, and the construction period is greatly shortened.
Drawings
The synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder implemented according to the invention comprises the following six figures.
FIG. 1 is a schematic diagram of step 1 of the synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder;
FIG. 2 is a schematic diagram of step 2 of the synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder of the invention.
FIG. 3 is a schematic diagram of step 3 of the synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder of the invention.
FIG. 4 is a schematic diagram of step 4 of the synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder of the invention.
FIG. 5 is a schematic diagram of step 5 of the synchronous construction method of the steel box girder self-anchoring suspension bridge tower girder of the invention.
FIG. 6 is a schematic view showing the transverse position relationship between the bridge tower and the main beam in the method for the synchronous construction of the steel box girder self-anchoring suspension bridge tower beam.
The reference numbers correspond to the description: 1. a main beam; 11. framing the steel box girder; 12. a steel box girder embedding section; 13. a steel guide beam; 21. side piers; 22. temporarily upsetting; 3. a bridge tower; 31. a tower column cantilever beam; 5. tower crane; 6. a main cable; 7. a sling.
Detailed Description
The present description will be further explained with reference to the drawings and examples.
The synchronous construction method of the tower beam of the steel box beam self-anchoring suspension bridge comprises the following steps.
Step 1: referring to fig. 1, firstly, a steel trestle is erected, and a foundation at the bottom of a bridge tower 3, a construction side pier 21 and a steel box girder pushing temporary pier 22 are constructed through the steel trestle;
step 2: referring to fig. 2 and 6, the framing steel box girder 11 is assembled on an assembling platform formed by a plurality of steel box girder pushing temporary piers 22, a pushing steel guide beam 13 is installed, and a lower tower column and a tower column cantilever beam 31 of the bridge tower 3 are constructed at the same time; the tower column cantilever beam 31 is arranged below the main beam 1; the main beam 1 is divided into a left independent steel box girder and a right independent steel box girder 11 which are symmetrical along the longitudinal central line of the bridge to be assembled, and the width of a steel box girder embedding section 12 reserved in the middle of the two steel box girders 11 is slightly larger than the transverse width of the bridge tower;
and step 3: referring to fig. 3, the incremental launching construction of the steel box girder 11 is performed step by step in turns, and two bridge towers 3 are simultaneously performed (including the tower column sections of the bridge towers 3 and the construction of the connecting beams between the tower column sections (the connecting beams are arranged between two adjacent tower columns of the same bridge tower along the front-back direction)); the steel box girder pushing is performed from one side in the direction of the starting point of the bridge under the influence of external environmental factors on the end point side of the pushing direction; the steel box girder pushing adopts walking type pushing, and the pushing equipment has the adjusting capability in three directions of vertical, horizontal and horizontal pushing; the steel box girder pushing turns are divided into four turns to carry out pushing construction by taking two banks and a main span as boundaries; the tower 3 tower column segment and the connecting cross beam are lifted to a designed position from the middle gap of the framing steel box girder 11 by using a tower crane 5 for installation; in the step 3, the bridge tower is a steel tower, and the bridge tower sections and the connecting beams are all steel structural members.
And 4, step 4: referring to fig. 4 and 6, after the framing steel box girder 11 is pushed to the right position, the construction of the steel box girder embedding section 12 is carried out in turns, and meanwhile, the remaining sections and the beams of the bridge tower 3 are continuously constructed until the construction is finished; after the framing steel box girder 11 is pushed in place, constructing a steel box girder embedding section 12 by using a tower crane 5 and assisting a truck crane and a flat car until the construction of the main girder 1 is finished;
and 5: referring to fig. 5, in the construction of the main cable 6 and the sling 7 and the construction of the auxiliary facilities, the high point of the main cable 6 is anchored on the bridge tower 3, the low point is anchored on the main beam along the sling 7, and the midspan between the high point and the low point is not anchored but is connected with the sling 7; and constructing the auxiliary facilities until the bridge construction is finished.
It should be noted that the above description is only used for illustrating some principles of the method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to the present invention, and since it is obvious to those skilled in the art that several modifications and changes can be easily made on the basis of the above principles. Therefore, the present disclosure is not intended to limit the invention to the exact construction and operation shown and described, and all such modifications, equivalents, improvements, and equivalents may be resorted to, falling within the scope of the invention.
Claims (10)
1. A synchronous construction method for a tower beam of a steel box girder self-anchoring suspension bridge is characterized in that the construction of a bridge tower and a main beam is carried out synchronously, and comprises the following steps:
step 1, erecting a steel trestle, and then constructing a foundation below a bridge tower, constructing side piers and pushing temporary piers by a steel box girder;
step 2, assembling the steel box girder forming the main girder on an assembling platform formed by pushing the temporary piers by the steel box girder, installing a pushing guide beam, and constructing a tower column under the bridge tower and a tower column cantilever beam;
step 3, gradually performing steel box girder pushing construction in turns, and simultaneously performing bridge tower columns and cross beams between the tower columns;
step 4, after the steel box girder is pushed in place, construction of the steel box girder embedding section is carried out in turns, and meanwhile, the bridge tower is continuously constructed until the construction is finished;
and 5, constructing the main cable, the sling and the auxiliary facilities until the bridge construction is finished.
2. The synchronous construction method of the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 2, the whole steel box girder is divided into two independent steel box girders in different widths which are symmetrical along the longitudinal center line of the bridge and assembled, a gap of the steel box girder embedding section is reserved between the two steel box girders in different widths, and the width of the steel box girder embedding section is slightly larger than the transverse width of the bridge tower.
3. The method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 3, a walking thruster is adopted for steel box girder thrusting, and the walking thruster has the capability of adjusting in three directions of vertical, horizontal and horizontal thrusting.
4. The synchronous construction method of the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 3, the bridge tower is formed by butt-jointing a plurality of bridge tower segments which are connected end to end in the vertical direction, and the bridge tower segments are lifted to a designed position from a gap reserved in the middle of the framing steel box girder by a tower crane for installation.
5. The method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 3, the same bridge tower is composed of a front bridge tower column and a rear bridge tower column which are symmetrically arranged along a vertical center line, and a connecting beam is arranged between the front bridge tower column and the rear bridge tower column.
6. The synchronous construction method of the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 3, the front and rear bridge tower columns are both composed of bridge tower segments; and each bridge tower segment and the connecting cross beam are lifted to a designed position by utilizing a clearance reserved in the middle of the framing steel box girder of the tower crane to be installed.
7. The method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to claim 5 or 6, wherein in the step 3, a plurality of connecting cross beams are arranged between the front and rear two bridge towers at intervals along the vertical direction.
8. The method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, 5 or 6, wherein in the step 3, the front and the rear bridge towers are arc-shaped columns with expanded middle parts and contracted bottoms, a plurality of connecting cross beams are arranged between the two arc-shaped columns, and the length of the connecting cross beam from the middle part to the bottom and the length of the cross beam from the middle part to the top are both gradually reduced.
9. The method for synchronously constructing the tower beam of the steel box girder self-anchoring suspension bridge according to claim 1, wherein in the step 3, a plurality of bridge towers distributed along the main beam are constructed simultaneously.
10. The synchronous construction method of the tower beam of the steel box beam self-anchoring suspension bridge according to claim 1, wherein in the step 4, after the steel box beam is pushed in place, a tower crane is used to assist an automobile crane and a flat car to carry out construction of the steel box beam embedding section.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011506889.2A CN112609586B (en) | 2020-12-18 | 2020-12-18 | Synchronous construction method for steel box girder self-anchoring suspension bridge tower girder |
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| CN202011506889.2A CN112609586B (en) | 2020-12-18 | 2020-12-18 | Synchronous construction method for steel box girder self-anchoring suspension bridge tower girder |
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| CN112609586B CN112609586B (en) | 2021-12-14 |
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