CN117513165A - Wind-resistant construction method for cable - Google Patents
Wind-resistant construction method for cable Download PDFInfo
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- CN117513165A CN117513165A CN202311537839.4A CN202311537839A CN117513165A CN 117513165 A CN117513165 A CN 117513165A CN 202311537839 A CN202311537839 A CN 202311537839A CN 117513165 A CN117513165 A CN 117513165A
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- tower
- rope
- cable
- anchor
- construction method
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 13
- 239000011435 rock Substances 0.000 claims abstract description 10
- 238000009415 formwork Methods 0.000 claims abstract description 7
- 230000009194 climbing Effects 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 25
- 239000010959 steel Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims 1
- 238000005491 wire drawing Methods 0.000 claims 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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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
-
- 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention provides a cable wind-resistant construction method, which relates to the technical field of cable construction, and comprises the following steps of S1: the main tower is poured, the tower column position is divided, the poured segments are determined, the main tower is poured, a tower crane and an elevator are arranged outside the tower column, a hydraulic climbing formwork is built, reinforcing steel bars are bound layer by layer, a formwork is fixed by embedded parts, concrete is poured to construct the main tower, a rock anchor and an anchor wall are used as rear anchor structures of the ground anchor, the cost of the ground anchor can be reduced, the main rope tower structure can be directly used as a foundation of the tower, a huge tower structure is not needed to be arranged, the construction cost is saved, the cable crane bearing rope ground anchor rear anchor position can be connected in series through a steering wheel, the bearing ropes are automatically adjusted to be basically consistent in height, the bearing ropes are stressed basically in balance, in addition, a reinforcing truss is arranged in the bridge structure, the strength of the bridge structure is effectively enhanced, the influence of transverse wind and vertical wind on the bridge structure can be effectively resisted, buffeting can be effectively restrained, and the problem of increasing cable construction difficulty is reduced.
Description
Technical Field
The invention relates to the technical field of cable construction, in particular to a cable wind-resistant construction method.
Background
Along with the rapid development of economy in China, construction of traffic infrastructure is rapidly developed, meanwhile, more and more large-span bridge construction projects are developed, a large-span suspension bridge is greatly developed in China, a suspension bridge is also called a hanging bridge, a cable (or a steel chain) which is hung and anchored on two sides (or two ends of the bridge) through a cable tower is used as a bridge of an upper structure main bearing member, the cable crane is applied to hoisting of a stiffening beam of the suspension bridge, the cable crane can move along a full span range after lifting a heavy object, the position of a lifting point is not limited, the erection speed is extremely high, the cost is low, the method becomes a feasible scheme for hoisting the stiffening beam of the suspension bridge, however, wind disaster is the most frequent one in natural disasters, structural vibration is excited after the bridge structure is small in rigidity, and wind bypasses the bridge structure, at the moment, the air force has a static force effect and a dynamic effect, but the current wind resistance structure of the bridge is complex, and the problems of increased cable construction and high cost are caused.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a cable wind-resistant construction method.
In order to achieve the above purpose, the present invention adopts the following technical scheme: a cable wind-resistant construction method comprises the following steps:
s1: pouring a main tower, dividing the positions of tower columns, determining poured sections, pouring the main tower, configuring a tower crane and an elevator outside the tower columns, constructing a hydraulic climbing formwork, binding steel bars layer by layer, burying a fixed template, and pouring concrete to construct the main tower;
s2: the method comprises the steps of firstly, constructing a ground anchor, pouring an anchor wall, then constructing the prestressed rock anchor, and then installing towers, wherein each tower uses a seamless steel pipe as a stand column, and is installed by lifting through a tower crane;
s3: the cable is erected, a steering wheel is arranged at the ground anchor, a bearing rope is wound around the surface of the steering wheel, after the bearing rope is erected, a horse race pulley is installed on a working platform of the cable tower, the horse race pulley is installed on the bearing rope, and after the assembly is completed, a carrying beam, a distributing beam and an upper hanging frame and a lower hanging frame are installed;
s4: setting a bridge reinforcing truss, arranging the reinforcing truss on the bridge deck of the bridge structure, approaching the maximum cantilever end in the bridge structure, and fixing the reinforcing truss on the bridge deck of the bridge structure according to the position of a hanging hole on the bridge structure;
s5: the hoisting rope is installed, the hoisting rope is pulled out from a hoisting winch, passes through a riding wheel arranged above the gravity anchor concrete and then passes through a pinch roller above the base, and is pulled to a rope tower by a puller to pass through a rope saddle and a rope making device and then passes through a horse-race upper hanging frame and a horse-race lower hanging frame, so that the installation of the hoisting rope is completed;
s6: the traction rope is installed, the traction rope is pulled out from the traction winch, passes through the pinch roller above the ground anchor, turns over the cable saddle on the tower top, passes through the guide wheel of the track car indexing device, and is pulled back to cross the cable saddle on the tower top to be anchored on the ground anchor, so that a double-wire traction system is formed.
In order to pour the anchor wall concrete in layers, the improvement of the invention is that in the S2, the construction of the prestressed rock anchor is required to be measured and lofted firstly, the lofting position is drawn out in a drawing line mode, and then the anchor wall concrete is poured in layers.
In order to form the load-bearing ropes into a series connection, the improvement of the invention is that in the step S3, after the load-bearing ropes bypass the steering wheel, the load-bearing ropes need to be butted up, so that the load-bearing ropes form a series structure.
In order to adopt different construction methods, the invention improves that in the S4, the construction method of the reinforced truss further comprises pouring grouting material under the bridge.
In order to determine the number of rope clamps, the invention is improved in the step S6, the number of the rope clamps at the joints at the anchoring points of the traction rope is not less than 8, the distance between each two rope clamps is 25cm, and the steel rope is flattened by the rope clamps by about 1/3.
In order to test the deformation and stress conditions of the tower, the invention is improved by installing a strain gage at the tower to test the deformation and stress conditions of the tower.
In order to determine the positions of the hanging points of different beam sections, the invention is improved in that the lower part of the horse race lower hanging frame is connected with a triangular hanging frame as a lifting tool, the triangular hanging frame is in an equilateral triangle shape, an I-shaped steel bearing is arranged below the triangular hanging frame and is used as the hanging point distribution of the different beam sections, and the hanging frame is directly connected with the cable lower hanging frame through a pin.
In order to be used as a support platform of a cable saddle, the invention is improved in that two transverse I-steel spandrel girders are arranged at the top of the tower, the distance between the two I-steel spandrel girders is 3.5 meters, and I-steel is paved on the top surface of the spandrel girders to be used as the support platform of the cable saddle.
Compared with the prior art, the invention has the advantages and positive effects that,
according to the invention, the rock anchors and the anchor walls are used as the rear anchor structure of the ground anchors, so that the cost of the ground anchors can be reduced, the main rope tower structure can be directly used as the foundation of the tower, a huge tower structure is not required to be arranged, the construction cost is saved, the rear anchor positions of the cable hanging load-bearing ropes and the ground anchors can be connected in series through the steering wheels, the load-bearing ropes can be automatically adjusted to be basically uniform in height, the stress of the load-bearing ropes is basically balanced, in addition, the reinforcing truss is arranged in the bridge structure, the strength of the bridge structure is effectively enhanced, the influence of transverse wind and vertical wind on the bridge structure can be effectively resisted, buffeting can be effectively restrained, and the problem of increasing of cable construction difficulty is solved.
Drawings
Fig. 1 is a construction flow chart of a cable wind-resistant construction method provided by the invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a cable wind-resistant construction method comprises the following steps:
s1: pouring a main tower, dividing the positions of tower columns, determining poured sections, pouring the main tower, configuring a tower crane and an elevator outside the tower columns, constructing a hydraulic climbing formwork, binding steel bars layer by layer, burying a fixed template, and pouring concrete to construct the main tower;
s2: the method comprises the steps of firstly, constructing a ground anchor, pouring an anchor wall, then constructing the prestressed rock anchor, and then installing towers, wherein each tower uses a seamless steel pipe as a stand column, and is installed by lifting through a tower crane;
s3: the cable erection, set up the steering wheel in the ground anchor, and twine the bearing rope towards the surface of the steering wheel, after the bearing rope is erected, install the horse race pulley on the working platform of the cable tower, the horse race pulley is installed on the bearing rope, use the combined shaft to link multiple horse race integrally, mount and carry the roof beam, distribute roof beam, upper and lower stores pylon after finishing assembling;
s4: setting a bridge reinforcing truss, arranging the reinforcing truss on the bridge deck of the bridge structure, approaching the maximum cantilever end in the bridge structure, and fixing the reinforcing truss on the bridge deck of the bridge structure according to the position of a hanging hole on the bridge structure;
s5: the hoisting rope is installed, the hoisting rope is pulled out from a hoisting winch, passes through a riding wheel arranged above the gravity anchor concrete and then passes through a pinch roller above the base, and is pulled to a rope tower by a puller to pass through a rope saddle and a rope making device and then passes through a horse-race upper hanging frame and a horse-race lower hanging frame, so that the installation of the hoisting rope is completed;
s6: the traction rope is installed, the traction rope is pulled out from a traction winch, passes through a pinch roller above a ground anchor and turns over a cable saddle on a tower top, a steel rope passes through a guide wheel of a sports car indexing device and is pulled back to cross the cable saddle on the tower top to be anchored on the ground anchor, a double-wire traction system is formed, at least 8 rope clamps are connected at the anchoring points of the traction rope, the distance between each rope clamp is 25cm, and the steel rope is flattened by the rope clamps by about 1/3.
The construction of the prestressed rock anchor comprises the steps of firstly measuring and setting out, drawing out the setting-out position in a drawing line mode, pouring anchor wall concrete in layers, after a bearing rope bypasses a steering wheel, abutting the bearing rope to form a series structure, pouring grouting materials under a bridge, installing a strain gauge at a tower to test deformation and stress conditions of the tower, setting a mark point on the top of the tower, using a total station to observe the displacement of the tower top in two directions of a transverse bridge and a bridge axis, installing the strain gauge on a diagonal brace of a tower foot to observe the deformation and stress conditions of the diagonal brace, connecting a triangular hanging frame under the diagonal hanging frame as a lifting tool, enabling the triangular hanging frame to be in an equilateral triangle shape, arranging an I-steel bearing under the triangular hanging frame as a hanging point of different beam sections, enabling the hanging frame to be directly connected with a cable hanging down hanging frame through pins, arranging two transverse I-steel bearing beams at the top of the tower, enabling the distance between the two I-steel bearing beams to be 3.5 meters, and paving I-steel on the top surface of the bearing beam as a supporting platform of a cable saddle.
Working principle: the method comprises the steps of pouring a main tower, dividing the position of a tower column, determining poured segments, pouring the main tower, configuring a tower crane and an elevator outside the tower column, constructing a hydraulic climbing formwork, binding steel bars layer by layer, fixing a formwork by a buried piece, pouring concrete to construct the main tower, installing the tower, first constructing a ground anchor, pouring anchor walls first and then constructing the prestressed rock anchors for ensuring the pore-forming precision of the prestressed rock anchors, then installing the tower, using seamless steel pipes as stand columns for each tower, hoisting and installing by the tower crane, erecting a cable, arranging steering wheels at the ground anchor, bypassing the surfaces of the steering wheels by the bearing ropes, installing a running horse pulley on a working platform of the cable tower after the bearing rope is erected, installing a carrying beam, distributing beams, installing bridge reinforcing trusses on a bridge deck of the bridge structure after the assembly is completed, approaching the maximum cantilever end of the bridge structure, fixing the reinforcing trusses on the bridge deck of the bridge structure according to the position of hanging holes on the bridge structure, installing the hoisting ropes, installing the hoisting saddle by the hoisting ropes, arranging the hoisting ropes by the hoisting ropes on the hoisting ropes, penetrating the hoisting ropes from the top of the bridge anchor to the base, penetrating the cable to the bottom of the cable, and penetrating the cable rope from the base to the bottom of the bridge structure, and penetrating the traction rope to the traction device and the two-layer traction device.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The cable wind-resistant construction method is characterized by comprising the following steps of:
s1: pouring a main tower, dividing the positions of tower columns, determining poured sections, pouring the main tower, configuring a tower crane and an elevator outside the tower columns, constructing a hydraulic climbing formwork, binding steel bars layer by layer, burying a fixed template, and pouring concrete to construct the main tower;
s2: the method comprises the steps of firstly, constructing a ground anchor, pouring an anchor wall, then constructing the prestressed rock anchor, and then installing towers, wherein each tower uses a seamless steel pipe as a stand column, and is installed by lifting through a tower crane;
s3: the cable is erected, a steering wheel is arranged at the ground anchor, a bearing rope is wound around the surface of the steering wheel, after the bearing rope is erected, a horse race pulley is installed on a working platform of the cable tower, the horse race pulley is installed on the bearing rope, and after the assembly is completed, a carrying beam, a distributing beam and an upper hanging frame and a lower hanging frame are installed;
s4: setting a bridge reinforcing truss, arranging the reinforcing truss on the bridge deck of the bridge structure, approaching the maximum cantilever end in the bridge structure, and fixing the reinforcing truss on the bridge deck of the bridge structure according to the position of a hanging hole on the bridge structure;
s5: the hoisting rope is installed, the hoisting rope is pulled out from a hoisting winch, passes through a riding wheel arranged above the gravity anchor concrete and then passes through a pinch roller above the base, and is pulled to a rope tower by a puller to pass through a rope saddle and a rope making device and then passes through a horse-race upper hanging frame and a horse-race lower hanging frame, so that the installation of the hoisting rope is completed;
s6: the traction rope is installed, the traction rope is pulled out from the traction winch, passes through the pinch roller above the ground anchor, turns over the cable saddle on the tower top, passes through the guide wheel of the track car indexing device, and is pulled back to cross the cable saddle on the tower top to be anchored on the ground anchor, so that a double-wire traction system is formed.
2. The cable wind-resistant construction method according to claim 1, wherein: in the step S2, the construction of the prestressed rock anchor is carried out by measuring and lofting firstly, drawing out the lofting position in a wire drawing mode, and then pouring anchor wall concrete in a layered mode.
3. The cable wind-resistant construction method according to claim 1, wherein: in the step S3, after the bearing rope bypasses the steering wheel, the bearing rope needs to be butted up, so that the bearing rope forms a serial structure.
4. The cable wind-resistant construction method according to claim 1, wherein: in the step S4, the construction method of the reinforced truss further comprises grouting slurry under the bridge.
5. The cable wind-resistant construction method according to claim 1, wherein: in the step S6, the number of the rope clamps at the anchor points of the traction ropes is not less than 8, the distance between each two rope clamps is 25cm, and the steel ropes are flattened by the rope clamps by about 1/3.
6. The cable wind-resistant construction method according to claim 1, wherein: the strain gage is installed at the tower to test the deformation and stress conditions of the tower.
7. The cable wind-resistant construction method according to claim 1, wherein: the lower portion of the horse race lower hanging frame is connected with a triangular hanging frame as a lifting tool, the triangular hanging frame is of an equilateral triangle, an I-steel bearing is arranged below the triangular hanging frame and is used as a hanging point for distribution of different beam sections, and the hanging frame is directly connected with the cable hoist lower hanging frame through a pin.
8. The cable wind-resistant construction method according to claim 7, wherein: the top of the tower is provided with two transverse I-steel spandrel beams, the distance between the two I-steel spandrel beams is 3.5 meters, and the top surface of the spandrel beam is fully paved with I-steel serving as a supporting platform of the cable saddle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537839.4A CN117513165A (en) | 2023-11-17 | 2023-11-17 | Wind-resistant construction method for cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311537839.4A CN117513165A (en) | 2023-11-17 | 2023-11-17 | Wind-resistant construction method for cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117513165A true CN117513165A (en) | 2024-02-06 |
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ID=89760321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311537839.4A Pending CN117513165A (en) | 2023-11-17 | 2023-11-17 | Wind-resistant construction method for cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117513165A (en) |
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2023
- 2023-11-17 CN CN202311537839.4A patent/CN117513165A/en active Pending
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