CN107476195B - Girder transporting pulley system for transporting stiffening girder by suspension bridge - Google Patents
Girder transporting pulley system for transporting stiffening girder by suspension bridge Download PDFInfo
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- CN107476195B CN107476195B CN201710702095.5A CN201710702095A CN107476195B CN 107476195 B CN107476195 B CN 107476195B CN 201710702095 A CN201710702095 A CN 201710702095A CN 107476195 B CN107476195 B CN 107476195B
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- girder
- transporting
- stiffening
- cable
- suspension bridge
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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
Abstract
The invention discloses a beam transporting pulley system for transporting stiffening beams of a suspension bridge, which comprises a group of cantilever beams which are hung on a main cable through slings and extend out of the sling surface of the suspension bridge and are horizontally arranged along the direction of the suspension bridge, and beam transporting pulleys which are hung at two end parts of a plurality of cantilever beams through longitudinal beams and are dragged by a reciprocating traction system to move on the cantilever beams and are in a groove structure. The invention has the characteristics of good economy and large bearing capacity, the transportation capacity can exceed 400 tons, and the running is smoother.
Description
Technical Field
The invention belongs to suspension bridge construction equipment, and particularly relates to a beam transporting pulley system for transporting stiffening beams of a suspension bridge.
Background
At present, a common method for erecting a whole section of steel truss stiffening girder at a shoal part of a suspension bridge across a river is known to be a trestle bridge method, a method for erecting a whole section of steel truss stiffening girder in the whole range of the suspension bridge across a canyon is known to be a rail cable sliding method, and the problem that a cable crane needs to overcome when being loaded and walking is large. The trestle method needs 2 rows of supporting piles and 2 rows of beams capable of bearing stiffening beams to slide on the supporting piles, steel and equipment are very large, and the supporting piles are difficult to install if the strength of riverbed bedrock is high. The rail cable sliding method can effectively solve the installation problem of the 2 bridge-type stiffening beams, but the rail cable and the anchoring thereof are expensive, and when the stiffening beam section is heavier, the up-and-down fluctuation of the beam transporting vehicle is larger.
Disclosure of Invention
The invention aims to provide a beam transporting pulley system for transporting stiffening beams of a suspension bridge, which has good economy and large bearing capacity.
The technical scheme adopted for realizing the purpose of the invention is as follows:
the invention provides a beam transporting pulley system for transporting stiffening beams of a suspension bridge, which comprises a group of outriggers which are hung on a main cable through slings and extend out of the sling surface of the suspension bridge and are horizontally arranged along the direction of the suspension bridge, and beam transporting pulleys which are hung at two end parts of a plurality of outriggers through longitudinal beams and are dragged by a reciprocating traction system to move on the outriggers and are in a groove structure.
The cantilever beam is fixed by a set of steel wire rope fixing system, two end parts of the cantilever beam are provided with flat roll devices, and the girder transporting pulley is supported on the flat roll devices at the end parts of 2-3 cantilever beams through a longitudinal beam.
The steel wire rope fixing system comprises a guide cable and a positioning cable which are respectively connected with the upper edge and the lower edge of the end part of the cantilever beam, the end part of the guide cable is fixed on the main cable through an anchoring cable clamp, a guide cable turning position node plate is arranged on the guide cable, and a guide cable balancing weight is suspended on the guide cable turning position node plate; the end part of the positioning cable is fixed on the main cable through an anchoring cable clamp, a positioning cable steering part node plate is arranged on the positioning cable, and a positioning cable balancing weight is suspended on the positioning cable steering part node plate.
The bottom of the longitudinal beam of the beam transporting pulley is provided with a vertical roller pair matched with the guide cable, so that the beam transporting pulley moves on the cantilever beam under the guide of the guide cable.
The beam transporting pulley comprises C-shaped hook trusses on two sides and a connecting beam for connecting the bottoms of the two C-shaped hook trusses, the longitudinal beam and the upper portion of each C-shaped hook truss are connected into a whole, a main truss sheet is arranged on the inner side of the longitudinal beam, and the beam transporting pulley is hooked on a flat roller device at the end portion of the cantilever beam through the main truss sheet.
The lower edges of the front end and the rear end of the longitudinal beam are made into an upward-warped arc.
Advantageous effects
1. The girder transporting pulley moves on the cantilever beam through the longitudinal beam to transport the stiffening girder segment, the longitudinal beam of the girder transporting pulley is equivalent to a section of movable track beam, 2-3 pairs of flat roll devices at two ends of the cantilever beam are always arranged below the longitudinal beam, the track is not required to be laid and the girder is not required to be erected in the whole process by adopting the mode, and the girder transporting pulley does not need to climb in the running process, does not need strong power and saves energy.
2. The cantilever beam uses the permanent sling as a support, does not need other support components with huge cost such as a support pile of a trestle, and the sling is a tensile component, so that the problem of instability of a pressure lever does not exist, and the sling takes root on a main cable, thereby saving cost, and being stable and reliable.
3. The two ends of the cantilever beam extend out of the sling surface, the flat roller device is placed on the cantilever beam and close to the sling, so that the mechanical characteristics of the cantilever beam are that the shearing force is large, the bending moment is small, only short beams with strong shearing resistance need to be manufactured at the joint (namely two ends) of the cantilever beam and the sling, the short beams at two ends are connected by a common recyclable shaping product, namely a Bailey frame, at the middle part of the cantilever beam, the Bailey frame is small in using amount, and a large amount of Bailey frames are needed when the trestle is used for paving a girder of a track.
The stiffening beam is erected by adopting the method and the equipment, so that the stiffening beam has the characteristics of good economy and large bearing capacity, the transportation capacity can exceed 400 tons, the running is smooth, and the suspension bridge crossing canyons and rivers can be implemented.
The technical scheme of the invention is further explained by combining the attached drawings.
Drawings
Fig. 1 is a schematic view of lifting a stiffening beam at a temporary suspension point location.
Fig. 2 is a schematic view of a stiffening beam placed on an incoming carrier skid.
Fig. 3 is a schematic view of the transfer trolley carrying stiffeners to the build position.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a schematic view of the cable crane lifting the stiffening beam and removing the beam trolley.
Fig. 6 is a partially enlarged view of fig. 5 at B.
Fig. 7 is a schematic view of the outrigger, securing system, traction system installed near the bridge tower.
Figure 8 is a schematic view of a guide wire in a reciprocating traction system and a wire rope securing system.
FIG. 9 is a schematic view of a positioning cable in the wire rope securing system of the present invention.
Fig. 10 is a schematic view of the remaining outriggers installed after the girder blocks are installed.
Figure 11 is a schematic view of the construction of the girder block.
Fig. 12 is a partial enlarged view of fig. 11 at C.
Figure 13 is a schematic view of the guide of the girder block.
In the figure, 1, an outrigger, 101, an end part, 102, an outrigger connecting beam, 2, a flat roller device, 3, an anchoring cable clamp, 4, a guide cable, 5, a positioning cable, 6, a guide cable steering node plate, 7, a positioning cable steering node plate, 8, a guide cable balancing weight, 9, a positioning cable balancing weight, 10, a beam transporting pulley, 1001, a C-shaped hook truss, 1002, a longitudinal beam, 1003, a longitudinal beam main truss sheet, 1004, a connecting beam, 11, a traction rope, 12, a fixed pulley, 13, a cable crane, 1301, a pulling system, 1302, a temporary cable clamp, 14, a stiffening beam hoisting system, 1401, a temporary cable clamp 1402, a steel wire rope, 1403, a traction steel wire rope, 1404, a pulley block, 1405, a flat spreader beam, 13, a cable hoisting steel wire rope, 15, a main cable, 16, 17, a stiffening beam, 18, a roller, a beam transporting ship.
Detailed Description
As shown in figure 1, the beam transporting pulley system of the stiffening beam for transporting the suspension bridge of the invention comprises slings 16 fixed on two main cables 15 respectively forming a suspension bridge sling surface, a group of cantilever beams 1 which are temporarily hung on the slings 16 and the two ends of which extend out of the sling surface of the suspension bridge and are horizontally arranged in parallel along the suspension bridge direction, and a beam transporting pulley 10 which is hooked on the two end parts 101 of a plurality of cantilever beams 1 through longitudinal beams 1002 arranged along the suspension bridge direction and is drawn by a reciprocating type traction system to move back and forth on the cantilever beams 1.
As shown in fig. 1 and 4, the outrigger 1 is formed by splicing two end parts 101 of a truss structure and an outrigger connecting beam 102 connecting the two end parts 101, the end part 101 of the outrigger 1 is welded by section steel and has a short length, and the middle outrigger connecting beam 102 is spliced by bailey frames and occupies most of the components of the outrigger 1; the flat roll devices 2 are arranged at the two end parts 101 of the cantilever beam 1, the installation positions of the flat roll devices 2 are close to slings 16 (supporting points), the bending moment of the gravity of the stiffening beam 17 and the beam transporting trolley 10 on the cantilever beam 1 is reduced to the maximum extent, so that the cantilever beam 1 does not need strong bending resistance, meanwhile, the end part 101 of the cantilever beam 1 is welded by strong section steel and can effectively bear load, the end part 101 of the cantilever beam only occupies a small part of the cantilever beam 1, the structure is very important for reducing the material consumption of a plurality of cantilever beams 1, the bailey truss belongs to a shaping product with strong bending resistance and relatively weak shearing resistance, is very suitable for being repeatedly used in large quantities, and avoids more one-time investment; the cantilever beam 1 is fixedly hung on an anchoring cable clamp 3 arranged on a main cable 15 through a set of steel wire rope fixing system, the steel wire rope fixing system comprises two groups of guide cables 4 and positioning cables 5 which are respectively anchored on the anchoring cable clamps 3 arranged on two main cables 15, as shown in figures 1, 6, 8 and 9, each group of guide cables 4 and positioning cables 5 is respectively connected with the upper edge and the lower edge of one end part 101 of all the cantilever beams 1, a guide cable steering node plate 6 and a positioning cable steering node plate 7 are respectively arranged on the guide cables 4 and the positioning cables 5 obliquely below the anchoring cable clamps 3, container type guide cable counterweight blocks 8 and positioning cable counterweight blocks 9 are respectively hung on the guide cable steering node plate 6 and the positioning cable steering node plates 7, and the guide cables 4 and the positioning cables 5 can be injected into the counterweight blocks to generate horizontal tension which is 3 times of the weight of the counterweight blocks so as to fix all rows of the cantilever beams 1, and the steel wire rope fixing system is used for preventing the cantilever beams 1 from overturning, shaking and resisting the impact of a transport beam trolley 10;
as shown in fig. 1, 11 and 12, the girder transport trolley 10 is a groove structure as a whole, the opening upwards is wider than the stiffening girder 17, and the stiffening girder 17 in the girder transport trolley 10 can be lifted upwards without obstacles; the girder transporting trolley 10 comprises C-shaped hook trusses 1001 on two sides and a connecting beam 1004 for connecting the bottoms of the C-shaped hook trusses 1001, the longitudinal beam 1002 is connected with the upper part of each C-shaped hook truss 1001 into a whole, a main girder sheet 1003 is arranged on the inner side of each longitudinal beam 1002, the girder transporting trolley 10 is hung on the flat roller device 2 at the end part 101 of the cantilever beam 1 through the main girder sheet 1003, the longitudinal beam 1002 of the girder transporting trolley 10 spans 2 stiffening beams and 17 beam sections, and the girder transporting trolley 10 is supported by 2-3 pairs of flat roller devices 2 all the time when sliding on the flat roller device 2 through the longitudinal beam 1002, so that tracks do not need to be laid and girders do not need to be erected in the whole process; the girder transport trolley longitudinal girder main girder piece 1003 belongs to a rigid track and is not similar to a flexible track cable, climbing is not needed in the running process of the girder transport trolley 10, fluctuation is small, strong traction power is not needed, energy is saved, and the advantages of the rigid track and the flexible track are combined; the connecting beams 1004 at the lower ends of the C-shaped hook trusses 1001 at the two sides of the connecting beam carrier are spliced by the Bailey frames, and because the C-shaped hook trusses 1001 have strong shearing resistance, the gravity of the stiffening beam 17 is mainly applied to the bottoms of the C-shaped hook trusses 1001 of the beam carrier, and the Bailey frames cannot bear large load; the lower edges of the front end and the rear end of the longitudinal beam 1002 are made into an upward-warped arc, because the sling 16 is long, a small amount of extension amount can be generated under the action of load, the girder transporting trolley 10 can sink, and the arc sections of the front end and the rear end of the longitudinal beam 1002 of the girder transporting trolley can enable the girder transporting trolley 10 to smoothly transit to the flat roll device 2.
As shown in fig. 1, 6 and 8, the reciprocating traction system for drawing the back and forth movement of the girder block 10 includes a traction rope 11 and a fixed pulley 12 connected to a traction device, the fixed pulley 12 is installed on the guide rope steering gusset 6, the traction rope 11 is rotated around the fixed pulley 12 to form a closed loop, and the traction device drives the traction rope 11 to reciprocate the girder block 10 between a temporary hoisting point position of the stiffening girder 17 and a splicing position of the stiffening girder 17. Since the traction force applied to the traction rope 11 by the traction sheave 10 is smaller than the tension force of the guide wire 4, the fixed sheave 12 for steering is arranged so as to effectively utilize the existing construction equipment.
As shown in fig. 1, 6, 10 and 13, the guide wire 4 also serves to guide the girder block 10. 3 pairs of vertical rollers 19 are arranged at the bottom of the longitudinal beam 1002 of the beam carrier, the guide cable 4 passes through the middle of each pair of rollers 19 (see fig. 13), the tensioned guide cable 4 forms certain rigidity, the beam carrier 10 is guided by the guide cable 4 when running, particularly in the area near the flat roller device 2, the guide cable 4 is more rigid, and the beam carrier 10 can be well guided to pass through the flat roller device 2.
The present invention is used for the transportation and assembly of a stiffening beam for a suspension bridge, and as shown in fig. 1 and 7, during construction, a stiffening beam lifting system 14 is suspended on a main cable 15, and a cable crane 13 movable along the main cable 15 for lifting and transporting the stiffening beam to an assembly position is installed on the main cable 15. The stiffening beam hoisting system 14 comprises a steel wire rope 1402 fixed on the main cable 15 through a temporary cable clamp 1401, an upper pulley block 1404 connected with the steel wire rope 1402, a lower pulley block 1404 connected with the upper pulley block 1404 through a traction steel wire rope 1403, a shoulder pole beam 1405 connected with the lower pulley block 1404', and a hoisting steel wire rope 1406 arranged on the shoulder pole beam 1405, wherein the traction steel wire rope 601 is connected with a winch at the top of the bridge tower 18; the cable crane 13 is secured to the main cable 3 by means of a temporary cable clamp 1302 and a pulling system 1301. The cable crane 13 is a shaped product which serves to lift the stiffening beam section 1 carried by the carrier trolley 8 to facilitate installation of this section.
The installation process of the invention is shown in fig. 1, 7-10, most of the outriggers 1 can be transported to the installation position by using the beam transporting trolley 10 for installation, 3 groups of outriggers 1 at the bridge tower 18 are firstly installed, and then the fixing system of the outriggers 1 is installed: the method comprises the steps of anchoring a cable clamp 3, a guide cable steering node plate 6, a positioning cable steering node plate 7, a guide cable 4, a positioning cable 5, a guide cable balancing weight 8 and a positioning cable balancing weight 9, wherein the balancing weight is a water tank surrounded by steel plates, only 1/2 of water is filled at the time, a beam transport pulley 10 is installed beside a bridge tower 18, a traction rope 11 of the beam transport pulley 10 is installed, a 4 th group of cantilever beams 1 are hung at the front end of the beam transport pulley 10, the beam transport pulley 10 is driven to run towards the midspan, the 4 th row of sling cables 16 are driven, the 4 th group of cantilever beams 1 are installed on a 4 th row of sling cables 16, the process is repeated, all the cantilever beams 1 are installed, the positions of all the cantilever beams 1 are adjusted, the remaining 1/2 of water is filled into the guide cable balancing weight 8 and the positioning cable balancing weight 9, the tensioning of the guide cable 4 and the positioning cable 5 is completed, and all the cantilever beams 1 are fastened with the guide cable 4 and the positioning cable 5.
The method for transporting and assembling the stiffening beam comprises the following steps:
1. as shown in fig. 1, in a place where a ship a can drive in a shoal export beam, a temporary hoisting point is provided, and a stiffening beam 17 is hoisted from the ship a, which is always set to a position of a closure section, and for a suspension bridge across a canyon, the stiffening beam 17 is generally transported from a bridgehead to a midspan; a plurality of horizontal parallel arranged outriggers 1 are temporarily suspended on a main cable 15 along the assembling direction of stiffening beams through slings 16, a beam transporting pulley 10 is hung on the outriggers 1 through longitudinal beams 1002 by taking two end parts 101 of the plurality of outriggers 1 as supporting hooks, a cable carrying crane 13 capable of moving along the main cable 15 is arranged on the main cable 15, and a stiffening beam hoisting system 14 is temporarily anchored on the main cable 15 above a temporary hoisting point.
2. As shown in fig. 1 and 2, the stiffening beams 17 at the temporary hoisting point are hoisted by the stiffening beam hoisting system 14; during hoisting, a hoisting steel wire 1406 on the shoulder pole beam 1405 fixes the stiffening beam 17, the winch drives the traction steel wire 1403 to hoist the lower pulley block 1404' and the shoulder pole beam 1405, and after the stiffening beam 17 is hoisted to the height of the beam transporting trolley 10 from the ship a, the beam transporting trolley 8 drives into the position of the stiffening beam 17 under the traction of the reciprocating traction system traction rope 11, and the stiffening beam 17 is lowered and falls into the beam transporting trolley 10.
3. As shown in fig. 3 and 5, the mobile beam transporting trolley 10 transports the stiffening beam 17 from the temporary hoisting point position to the assembling position, the cable carrying crane 13 carries the suspended stiffening beam 17 to a position about 10cm below the installation position, the beam transporting trolley 10 is moved away, the outrigger 1 of the section is detached from the sling 16 and falls on the stiffening beam 17, the stiffening beam 17 is lifted again, the stiffening beam 17 is connected with the sling 16 after the outrigger 1 is detached, the stiffening beam 17 is assembled with the erected stiffening beam, and the cable carrying crane 13 is moved to the assembling position of the next beam section by the pulling system 1301 for waiting;
4. and repeating the second step and the third step, and assembling the stiffening beams 17 one by one.
The method has the advantages of good economy, strong adaptability, safe, stable and rapid beam transporting process, large sling length near the bridge tower, maximum extension amount, no more than 10cm at most, namely the fluctuation of the beam transporting pulley in the beam transporting process can not exceed 10cm, smoothness and stability, and is beneficial to improving the beam transporting speed. The invention is suitable for the situation that the stiffening beam can not be transported under the bridge for vertical hoisting and installation, such as the suspension bridge shoal position crossing rivers and the suspension bridge crossing canyons.
Claims (7)
1. A beam transporting pulley system for transporting stiffening beams of a suspension bridge is characterized by comprising a group of cantilever beams which are hung on a main cable through slings and extend out of the sling surface of the suspension bridge and are horizontally arranged along the direction of the suspension bridge, and beam transporting pulleys which are hung at two ends of a plurality of cantilever beams through longitudinal beams and are dragged by a reciprocating traction system to move on the cantilever beams and are in a groove structure.
2. The girder transporting trolley system for transporting stiffening girders through a suspension bridge as claimed in claim 1, wherein the outriggers are fixed by a set of steel wire rope fixing system, flat roll devices are provided at both ends of the outriggers, and the girder transporting trolley is supported on the flat roll devices at the ends of 2-3 outriggers through the longitudinal beams thereof.
3. The girder transporting trolley system for transporting stiffening girders of a suspension bridge as claimed in claim 2, wherein the wire rope fixing system comprises a guide rope and a positioning rope respectively connected to the upper edge and the lower edge of the end of the outrigger, the end of the guide rope is fixed on the main cable by an anchoring rope clamp, the guide rope is provided with a guide rope turning node plate, and a guide rope counterweight is suspended on the guide rope turning node plate; the end part of the positioning cable is fixed on the main cable through an anchoring cable clamp, a positioning cable steering part node plate is arranged on the positioning cable, and a positioning cable balancing weight is suspended on the positioning cable steering part node plate.
4. The girder transporting block system for transporting a stiffening girder of a suspension bridge according to claim 3, further comprising a stiffening girder hoisting system including a pulley block suspended on the main cable by the temporary rope clamp and the wire rope, the pulley block hoisting the stiffening girder by the spreader beam and the hoisting wire rope, the traction wire rope of the traction pulley block being connected to a hoist at the top of the bridge tower.
5. The girder transporting trolley system for transporting a stiffening girder through a suspension bridge as claimed in claim 4, wherein the bottom of the longitudinal girder of the girder transporting trolley is provided with a pair of vertical rollers which are matched with the guide cables, so that the girder transporting trolley moves on the outriggers under the guidance of the guide cables.
6. The girder transporting trolley system for transporting a stiffening girder through a suspension bridge as claimed in claim 1 or 5, wherein the girder transporting trolley comprises C-shaped hook trusses at both sides and a connecting girder connecting the bottoms of the two C-shaped hook trusses, the girder is integrally connected to the upper portion of each of the C-shaped hook trusses, a main girder piece is provided at the inner side of the girder, and the girder transporting trolley is hooked on a flat roller device at the end of the cantilever girder through the main girder piece.
7. A girder transporting trolley system for transporting a stiffening girder according to claim 6 wherein the lower edges of the front and rear ends of the longitudinal girders are formed in an upwardly turned arc shape.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702095.5A CN107476195B (en) | 2017-08-16 | 2017-08-16 | Girder transporting pulley system for transporting stiffening girder by suspension bridge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702095.5A CN107476195B (en) | 2017-08-16 | 2017-08-16 | Girder transporting pulley system for transporting stiffening girder by suspension bridge |
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| CN107476195A CN107476195A (en) | 2017-12-15 |
| CN107476195B true CN107476195B (en) | 2023-04-07 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108625275B (en) * | 2018-05-09 | 2019-12-20 | 中交一公局集团有限公司 | Method for installing stiffening beam section of suspension bridge |
| CN109137759B (en) * | 2018-09-29 | 2023-12-19 | 中铁第四勘察设计院集团有限公司 | Precast cantilever assembling method and system for prestressed concrete box girder segment |
| CN110844801B (en) * | 2019-11-12 | 2020-12-18 | 湖南路桥建设集团有限责任公司 | Split type cable carrying crane for erecting main beam of suspension bridge |
| CN111691305A (en) * | 2020-06-11 | 2020-09-22 | 中交二公局第二工程有限公司 | Method for installing main beam of suspension bridge |
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| CN207227964U (en) * | 2017-08-16 | 2018-04-13 | 湖南路桥建设集团有限责任公司 | A kind of suspension bridge transports the fortune beam tackle system of stiff girder |
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| CN200967927Y (en) * | 2006-10-27 | 2007-10-31 | 湖南省交通厅 | Rope-suspension bridge multi-span ropeway girder conveyer |
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| CN107476195A (en) | 2017-12-15 |
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