CN114525739B - Long heavy cable hanging installation method for multi-point hanging of under-bridge span cables - Google Patents
Long heavy cable hanging installation method for multi-point hanging of under-bridge span cables Download PDFInfo
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- CN114525739B CN114525739B CN202210228110.8A CN202210228110A CN114525739B CN 114525739 B CN114525739 B CN 114525739B CN 202210228110 A CN202210228110 A CN 202210228110A CN 114525739 B CN114525739 B CN 114525739B
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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
- E01D11/04—Cable-stayed bridges
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Abstract
The invention belongs to the technical field of construction of stay cables of a cable-stayed bridge tower, and particularly relates to a long heavy cable hanging installation method for multi-point hanging of a span cable under a bridge. The method comprises the following steps that S100-bridge deck winches positioned on the other side of a cable-stayed bridge tower are connected with anchor heads at one ends of stay cables through traction steel wire ropes, and the traction steel wire ropes pass through bridge side steering fixed pulleys at the ends of box girders of the cable-stayed bridge. S200, pulling the stay cable to vertically lift up to the bridge floor height by the traction steel wire rope. S300, arranging a beam cantilever hanging bracket at a position above the bridge deck of the cable-stayed bridge tower. S400, the front cantilever winch and the rear cantilever winch respectively penetrate through a front cantilever bracket fixed pulley and a rear cantilever bracket fixed pulley on the beam cantilever hanger through steel wire ropes to alternately pull up the stay cable. S500, lifting the stay cable anchor head to the position of the tower end cable guide pipe. And S600, continuously lifting the residual length of the stay cable by using the tower crane. S700, gradually lowering each suspension point after the anchor head at the beam end of the stay cable is lifted to the bridge deck.
Description
Technical Field
The invention belongs to the technical field of construction of stay cables of a cable-stayed bridge tower, and particularly relates to a long heavy cable hanging installation method for multi-point hanging of a span cable under a bridge.
Background
With the increasing development of bridge construction, a large-span cable-stayed bridge is increasingly applied, and a stay cable is a structural member which is used as a main support of a main girder and is subjected to heavy tension. Conventional stay cable solution: after the stay cable is transported to the site, the stay cable is hoisted to a bridge deck cable-spreading disc through a tower crane or a floating crane or a ground large crane, the bridge deck cable-spreading disc is used for obliquely downwards placing an anchor head into a cable guide pipe through a beam surface automobile crane, the anchor head is towed to a beam end position through a cable-spreading trolley, a cap is arranged outside an anchor pad to fix the anchor head, the bridge deck cable-spreading and the beam end cable-hanging are completed, a steel wire rope is towed in a tower end installation tower, a tower top hoist, the tower crane and the like are matched to lift the front end of the cable-stayed cable, when the weight of the cable exceeds the rated crane weight of the tower crane, the large crane is matched to spread the cable in the air, the tower end anchor is towed to the cable guide pipe, and then enters the cable guide pipe after adjustment, and is towed to the tower end anchor pad to be provided with an anchor ring, so that the tower end cable-hanging is completed.
The traditional hanging rope scheme has the defects that the length and the height of the hanging rope at the tower end are larger and larger along with the increasing diameter of the stay rope, the required traction force is larger and larger when the tower end is hung, the upward traction force is insufficient or the rope expanding space is insufficient easily when conventional equipment is used. When the stay cable is overlong and overweight, the stay cable is integrally lifted by crane, larger tonnage lifting equipment is needed, the field practical application is not met, and the larger traction force needed by the tower end hanging cable is, so that the allowable lifting weight range of the tower crane is exceeded, and safety accidents are easily caused.
Disclosure of Invention
In order to solve the problems, the invention provides a long heavy cable hanging installation method for multi-point hanging of a span cable under a bridge.
The invention adopts the following technical scheme that the long heavy cable hanging installation method for multi-point hanging of the under-bridge cable spreading comprises the following steps.
S100-a guy cable transport vehicle transports the guy cable to one side of a cable-stayed bridge tower, a winch on the bridge deck, which is positioned on the other side of the cable-stayed bridge tower, is connected with an anchor head at one end of the guy cable through a traction steel wire rope, and the traction steel wire rope passes through a bridge side steering fixed pulley at the end part of a box girder of the cable-stayed bridge.
S200-traction steel wire rope traction stay cable is lifted to the height of the bridge deck along the vertical direction, and one end of the anchor head of the traction stay cable is converted from the vertical direction to the horizontal direction to be pulled to the bridge deck through a bridge side steering fixed pulley.
S300-a beam cantilever hanging frame is arranged at a position above a bridge deck of a cable-stayed bridge tower, a front cantilever support fixed pulley and a rear cantilever support fixed pulley are arranged on the beam cantilever hanging frame, a sling is utilized to bind the middle position of a suspension cable, the position is used as a first hanging point, a front cantilever winch arranged in the middle of the bridge deck passes through the front cantilever support fixed pulley on the beam cantilever hanging frame through a steel wire rope to pull up the suspension cable, the suspension cable continues to lift along a bridge side steering fixed pulley, lifting is stopped after the suspension cable is lifted to the bottom height of an upper beam, and a second hanging point is formed by connecting the position, which is positioned between the first hanging point and an anchor head, of the suspension cable on the suspension cable, so that the suspension cable forms a parabolic state in the air.
S400, the front cantilever winch and the rear cantilever winch respectively penetrate through a front cantilever bracket fixed pulley and a rear cantilever bracket fixed pulley on the beam cantilever hanger through steel wire ropes to alternately pull up the stay cable.
S500-lifting the stay cable anchor head to the position of the tower end cable guide pipe, stretching the anchor head into the tower end cable guide pipe by a traction steel wire rope in the tower to fix the tower end anchor head, installing an anchor head nut, and fixing the tower end anchor head of the stay cable, so that the tower end cable hanging construction is completed.
And S600, continuously lifting the residual length of the stay cable by using the tower crane.
And S700, when the anchor head of the beam end of the stay cable is lifted to the bridge deck, slowly continuing to descend, placing the cable-expanding trolley below the stay cable while descending, and using a beam end winch arranged on the bridge deck to pull the stay cable to start to expand along the length direction of the bridge, and gradually descending each lifting point.
The concrete process of S400 is that the connection between the stay cable anchor head and the winch is removed, a constructor connects a traction steel wire rope in the tower with the anchor head at the bridge floor position, the side position of the stay cable bridge is bundled by using a hanging strip, the position is used as a third lifting point, a front cantilever winch arranged at the middle part of the bridge floor passes through a front cantilever bracket fixed pulley on a beam cantilever crane through the steel wire rope to be connected with the third lifting point of the stay cable, the front cantilever winch starts to lift the length of the rest stay cable, at the moment, the beam cantilever crane slowly lowers the lifting point along with the increase of the length of the stay cable, the tower crane starts to vertically lift the anchor head along the bridge tower, after the lifting to a certain height, a rear cantilever crane arranged at the middle part of the bridge floor is connected with the tail end of a surface section of the stay cable beam through a rear cantilever bracket fixed pulley on the beam cantilever crane, the rear cantilever winch starts to slowly lift the stay cable, the rear cantilever winch slowly lifts the stay cable, and the front cantilever winch slowly lowers the stay cable, simultaneously, the steel wire rope and the rear cantilever crane starts to slowly lift the stay cable in the tower, the front cantilever crane and the stay cable and the rear cantilever bracket fixed pulley are repeatedly replaced until the cable is lifted to the end of the cable tower.
In S100, the bridge deck is the upper surface of a cable-stayed bridge box girder on a cable-stayed bridge tower.
The transverse cantilever hanging bracket is arranged on a cross beam of a cable-stayed bridge tower.
The beam cantilever hanging bracket comprises an I-shaped steel beam on a fixed beam, and a front cantilever bracket fixed pulley and a rear cantilever bracket fixed pulley are arranged at two ends of the I-shaped steel beam.
The I-shaped steel beam is welded and fixed with the embedded steel plate in the cross beam.
The winch, the front cantilever winch and the rear cantilever winch are sequentially arranged along the bridge deck from left to right, the winch is positioned at the leftmost end part of the bridge deck, and the front cantilever winch and the rear cantilever winch are positioned on the bridge deck at the lower left side of the transverse cantilever hanger.
Compared with the prior art, the invention forms a plurality of suspension points to decompose the overlong stay ropes into curves by alternately lifting the lengths of the residual stay ropes to the beam surface by using the large-mileage side suspension frame and the small-mileage side suspension frame of the upper beam, reduces single suspension weight, fully utilizes bridge deck space, ensures that the suspension weight does not exceed the allowable suspension weight of equipment, accelerates construction speed and ensures construction safety. The investment of large crane equipment for each long and heavy bridge loading is avoided, and the construction cost is reduced.
Drawings
FIG. 1 is a schematic illustration of a cable of the present invention in a cable tower end upper bridge;
FIG. 2 is a schematic view of a beam boom hanger of the present invention lifting stay cable;
FIG. 3 is a schematic illustration of an aerial cable deployment tower end hitch of the present invention;
FIG. 4 is a schematic transverse cross-sectional view of a beam cantilever crane of the present invention;
FIG. 5 is a schematic illustration of an alternate lift cable of the suspension cable beam boom hanger of the present invention;
FIG. 6 is a schematic view of the expansion of the deck of the long heavy stay cable of the present invention;
FIG. 7 is a schematic view of the present invention with the stay cable lowered;
in the figure, a 1-cable-stayed bridge tower, a 2-cable-stayed bridge box girder, a 3-winch, a 4-bridge side steering fixed pulley, a 5-traction steel wire rope, a 6-stay cable, a 7-stay cable carrier, an 8-beam cantilever hanger, a 9-tower crane, a 10-front cantilever winch, a 11-rear cantilever winch, a 12-tower internal traction steel wire rope, a 13-front cantilever bracket fixed pulley, a 14-rear cantilever bracket fixed pulley, a 15-bridge deck cable-expanding trolley and a 16-bridge deck girder end winch are shown.
Detailed Description
A long heavy cable hanging installation method for under-bridge cable spreading multipoint hanging comprises the following steps:
s100, as shown in FIG 1, a stay cable transport vehicle 7 transports a stay cable 6 to one side of a cable-stayed bridge tower 1, a winch 3 positioned on the bridge deck and at the other side of the cable-stayed bridge tower 1 is connected with an anchor head at one end of the stay cable 6 through a traction steel wire rope 5, and the traction steel wire rope 5 passes through a bridge side steering fixed pulley 4 at the end part of a cable-stayed bridge box girder 2; the bridge deck is the upper surface of a cable-stayed bridge box girder 2 on a cable-stayed bridge tower 1.
S200-traction steel wire rope 5 pulls stay cable 6 to lift to the bridge floor height along vertical upwards, and one end of the anchor head of traction stay cable 6 is changed from vertical upwards to horizontal direction to be pulled to the bridge floor through bridge side steering fixed pulley 4.
S300-as shown in FIG. 2, a beam cantilever hanging bracket 8 is arranged at the beam position on the cable-stayed bridge tower 1, the beam cantilever hanging bracket 8 comprises an I-beam on a fixed beam, and a front cantilever bracket fixed pulley 13 and a rear cantilever bracket fixed pulley 14 are arranged at two ends of the I-beam. The middle position of the suspension belt binding stay cable 6 is used as a first hanging point, a front cantilever winch 10 arranged in the middle of the bridge deck passes through a front cantilever bracket fixed pulley 13 on a beam cantilever hanging bracket 8 through a steel wire rope to pull up the stay cable 6, the stay cable 6 continues to lift along a bridge side steering fixed pulley 4, lifting is stopped after lifting to the bottom height of an upper beam, and the tower crane 9 is used for connecting the position, located between the first hanging point and an anchor head, of the stay cable 6 to form a second hanging point, so that the stay cable forms a parabolic state in the air.
S400-as shown in figures 3 and 4, the connection of the anchor head of the stay cable 6 and the winch 3 is removed, a constructor connects a traction steel wire rope 12 in the tower with the anchor head at the bridge deck position, the position is used as a third lifting point by using a hanging strip to bind the bridge side position of the stay cable 6, a front cantilever winch 10 arranged in the middle of the bridge deck passes through a front cantilever support fixed pulley 13 on a beam cantilever crane 8 through the steel wire rope to be connected with the third lifting point of the stay cable 6, the front cantilever winch 10 starts to lift the length of the rest stay cable 6, at the moment, the beam cantilever crane 8 slowly lowers the lifting point along with the increase of the bridge length of the stay cable 6, the tower crane 9 starts to lift the anchor head vertically upwards along the bridge tower, after the lifting to a certain height, a rear cantilever winch 11 arranged in the middle of the bridge deck is connected with the tail end of a beam section of the stay cable 5 through a rear cantilever support fixed pulley 14 on the beam cantilever crane 8, the rear cantilever winch 11 starts to slowly lift the stay cable upwards, the front cantilever winch 10 slowly lowers the stay cable, simultaneously, the traction rope 12 in the tower crane and the anchor head of the stay cable 9 are slowly lifted repeatedly until the front cantilever support fixed pulley is lifted to the position of the bridge end of the tower support fixed pulley is repeatedly, and the cable is lifted.
S500-after the anchor head of the stay cable 6 is lifted to the position of the tower end cable guide pipe, the traction steel wire rope 12 in the tower stretches into the tower end cable guide pipe to fix the tower end anchor head, and an anchor head nut is arranged to fix the tower end anchor head of the stay cable 6, so that the tower end cable hanging construction is completed.
And S600, continuously lifting the residual length of the stay rope 6 by using the tower crane 9.
S700-as shown in FIG. 7, after the beam end anchor head of the stay cable 6 is lifted onto the bridge deck, slowly continuing to descend, placing the cable-spreading trolley under the stay cable while descending, and using the beam end winch 16 arranged on the bridge deck to pull the stay cable to start to spread along the length direction of the bridge, and gradually descending each lifting point.
Engineering example:
the canal river extra large bridge and the Jiang river extra large bridge main bridge of the highway are both double-tower double-cable-stayed bridges, the bridge span is 155+350+155=660 m, the main beams adopt the section arrangement form of separated double-side main beams, the main beams are of prestressed concrete structures, the height of the beams at the center is 3.3m, the width of the top surface is 31.0m, the stay cables adopt phi 7.0 mm galvanized high-strength low-relaxation parallel steel wire double-layer PE sheath finished cables, the construction tower crane has the maximum hanging weight of 10t, the total number of 224 cables is 224, the length of the longest cable reaches 200m, and the weight of the cables reaches 20t. The unit successfully installs the 17# -28# long heavy cable by using the 'long heavy cable hanging installation method of under-bridge span cable multipoint hanging', and ensures that the stay cable is accurately and safely installed through innovation and reasonable organization of the technology.
The problem that the bridge deck space of the long stay cable is insufficient in cable spreading and the problem that the hanging amount of the hanging cable is limited is solved, the long stay cable is decomposed into curves, the single hanging weight is reduced, the bridge deck space is fully utilized, the hanging weight is ensured not to exceed the allowable hanging weight of equipment, the construction speed is increased, and the construction safety is ensured. The investment of large crane equipment for each long and heavy loading is avoided, the construction cost is reduced, and the traditional inhaul cable installation method is improved.
According to the construction of the traditional crane matched with the guy ropes, 50t crane matching is needed, the average installation time of each guy rope is 2.0d, the quota of 50t is 0.36 ten thousand yuan/station, 96 long heavy guy ropes are counted in 288 guys, and the average installation time of each long heavy guy rope is 1.0d without 50t crane matching by adopting the method.
Compared with the traditional crane, the daily cost of hanging ropes is saved by 0.66 ten thousand yuan, in the case of a Jiang river super bridge, the total number of main girder long and heavy stayed ropes is 96, the hanging rope time of each rope is 1.0d, the total construction cost is saved by 0.66 ten thousand yuan/d 96 d=63.36 ten thousand yuan, the construction period is saved by 5.26 ten thousand yuan/d 144 d= 757.44 ten thousand yuan, and the total cost is saved by 820.8 ten thousand yuan.
Claims (7)
1. A long heavy cable hanging installation method for multi-point hanging of a spread cable under a bridge is characterized in that: comprises the steps of,
s100-a guy cable transport vehicle (7) transports a guy cable (6) to one side of a cable-stayed bridge tower (1), a winch (3) positioned on the bridge deck and at the other side of the cable-stayed bridge tower (1) is connected with an anchor head at one end of the guy cable (6) through a traction steel wire rope (5), and the traction steel wire rope (5) passes through a bridge side steering fixed pulley (4) at the end part of a cable-stayed bridge box girder (2);
s200-a traction steel wire rope (5) is used for traction of a stay cable (6) to be lifted to the height of a bridge deck along the vertical direction, and one end of an anchor head of the traction stay cable (6) is turned from the vertical direction to the horizontal direction to be traction to the bridge deck through a bridge side steering fixed pulley (4);
s300-arranging a beam cantilever hanging bracket (8) at a position above a bridge deck of a cable-stayed bridge tower (1), arranging a front cantilever bracket fixed pulley (13) and a rear cantilever bracket fixed pulley (14) on the beam cantilever hanging bracket (8), binding the middle position of a suspension cable (6) by using a hanging strip, taking the position as a first hanging point, and pulling up the suspension cable (6) by a front cantilever winch (10) arranged in the middle of the bridge deck through a steel wire rope penetrating the front cantilever bracket fixed pulley (13) on the beam cantilever hanging bracket (8), continuing lifting the suspension cable (6) along a bridge side steering fixed pulley (4), stopping lifting after lifting to the upper beam bottom height, and connecting the suspension cable (6) at the position positioned between the first hanging point and an anchor head by using a tower crane (9) to form a second hanging point so that the suspension cable forms a parabolic state in the air;
s400-a front cantilever winch (10) and a rear cantilever winch (11) respectively penetrate through a front cantilever bracket fixed pulley (13) and a rear cantilever bracket fixed pulley (14) on a cross beam cantilever hanger (8) through steel wire ropes to alternately pull up stay cables;
s500-after the anchor head of the stay cable (6) is lifted to the position of the tower end cable guide pipe, the traction steel wire rope (12) in the tower stretches into the tower end cable guide pipe to fix the tower end anchor head, an anchor head nut is arranged, and the tower end anchor head of the stay cable (6) is fixed, so that tower end cable hanging construction is completed;
s600, continuously lifting the residual length of the stay cable (6) by using the tower crane (9);
s700-when the beam end anchor head of the stay cable (6) is lifted to the bridge deck, slowly continuing to descend, placing the cable-spreading trolley under the stay cable while descending, and using a beam end winch (16) arranged on the bridge deck to pull the stay cable to start to unfold along the length direction of the bridge, and gradually descending each lifting point.
2. The method for installing a long heavy cable hanging device for under-bridge span cable multipoint hanging according to claim 1, wherein the method comprises the following steps: the concrete process of S400 is that the connection of the anchor head of the suspension cable (6) and the hoist (3) is removed, constructors connect a traction steel wire rope (12) in the tower with the anchor head at the bridge floor position, the position is used as a third suspension point for binding the suspension cable (6) at the bridge side position by using a hanging strip, a front suspension arm hoist (10) arranged at the middle part of the bridge floor passes through a front suspension arm support fixed pulley (13) on the beam suspension arm hanger (8) through the steel wire rope to be connected with the third suspension point of the suspension cable (6), the front suspension arm hoist (10) starts to lift the length of the rest suspension cable (6), at the moment, the beam suspension arm hanger (8) slowly lowers the suspension point along with the increase of the bridge length of the suspension cable (6), the tower crane (9) starts to vertically lift the anchor head upwards along the bridge tower, after the suspension cable is lifted to a certain height, a rear suspension arm hoist (11) arranged at the middle part of the bridge floor is connected with the tail end of a beam section of the suspension cable (6) through a rear suspension arm support fixed pulley (14) on the beam suspension arm hanger (8), the rear suspension arm hoist (11) starts to slowly lift the suspension cable (11) upwards, the suspension cable (10) slowly lifts the suspension cable (14) and the front suspension cable (14) slowly and the suspension cable (14) are repeatedly lifted by the suspension cable (12) at the same time, until the anchor head of the cable-stayed cable tower end is lifted to the position of the cable guide pipe at the tower end.
3. The method for installing a long heavy cable hanging device for under-bridge span cable multipoint hanging according to claim 1, wherein the method comprises the following steps: in the S100, the bridge deck is the upper surface of a cable-stayed bridge box girder (2) on a cable-stayed bridge tower (1).
4. The method for installing a long heavy cable hanging device for under-bridge span cable multipoint hanging according to claim 1, wherein the method comprises the following steps: the beam cantilever hanging bracket (8) is arranged on the beam of the cable-stayed bridge tower (1).
5. The method for installing the long heavy cable hanging device for the under-bridge span cable multipoint hanging according to claim 4, wherein the method comprises the following steps of: the beam cantilever hanging bracket (8) comprises an I-shaped steel beam on a fixed beam, and a front cantilever bracket fixed pulley (13) and a rear cantilever bracket fixed pulley (14) are arranged at two ends of the I-shaped steel beam.
6. The method for installing the long heavy cable hanging device for the under-bridge span cable multipoint hanging according to claim 5, wherein the method comprises the following steps of: and the I-shaped steel beam is welded and fixed with the embedded steel plate in the cross beam.
7. The method for installing a long heavy cable hanging device for under-bridge span cable multipoint hanging according to claim 1, wherein the method comprises the following steps: the front cantilever winch (10) and the rear cantilever winch (11) are sequentially arranged along the bridge deck from left to right, the winch (3) is positioned at the leftmost end part of the bridge deck, and the front cantilever winch (10) and the rear cantilever winch (11) are positioned on the bridge deck at the lower left side position of the beam cantilever hanger (8).
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| CN202210228110.8A CN114525739B (en) | 2022-03-10 | 2022-03-10 | Long heavy cable hanging installation method for multi-point hanging of under-bridge span cables |
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| CN202210228110.8A CN114525739B (en) | 2022-03-10 | 2022-03-10 | Long heavy cable hanging installation method for multi-point hanging of under-bridge span cables |
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| JP2000054321A (en) * | 1998-08-07 | 2000-02-22 | Sumitomo Constr Co Ltd | Installation of oblique cable |
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| CN105401523A (en) * | 2015-09-30 | 2016-03-16 | 中铁港航局集团有限公司 | Hanging mounting method of long heavy stay cable under space limited condition |
| CN111364363A (en) * | 2020-03-17 | 2020-07-03 | 山西四建集团有限公司 | Stay cable construction tensioning method |
| CN111636313A (en) * | 2020-06-08 | 2020-09-08 | 柳州欧维姆结构检测技术有限公司 | Installation and maintenance system for bridge inhaul cable brightening engineering and construction method thereof |
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2022
- 2022-03-10 CN CN202210228110.8A patent/CN114525739B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000054321A (en) * | 1998-08-07 | 2000-02-22 | Sumitomo Constr Co Ltd | Installation of oblique cable |
| CN1253197A (en) * | 1998-11-09 | 2000-05-17 | 柳州欧维姆建筑机械有限公司 | Method and system for suspending oblique guys of cable stayed bridge |
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| CN114525739A (en) | 2022-05-24 |
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