CN111172892A - Bilateral balance traction device and method for steel structure frame bridge - Google Patents
Bilateral balance traction device and method for steel structure frame bridge Download PDFInfo
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- CN111172892A CN111172892A CN201911407224.3A CN201911407224A CN111172892A CN 111172892 A CN111172892 A CN 111172892A CN 201911407224 A CN201911407224 A CN 201911407224A CN 111172892 A CN111172892 A CN 111172892A
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Abstract
本发明公开了一种钢结构框架桥双边平衡牵引装置及其方法，属于桥梁建筑领域，包括临时支架、桥墩、坦克轮、桥钢架、导桥、导桥拉力钢丝、牵引龙门架、收缩拉力钢丝、卷场机和定滑轮装置。本发明通过减少河面上的施工作业，安全性较好，牵引采用卷扬机费用也较少，钢结构框架桥双边平衡牵引技术是一种较为简便、安全的施工方法，它具有设备工艺简单、岸上拼装，操作空间大，作业面广、施工速度快、费用低等特点，此装置用于大新硕龙钢结构框架桥牵引施工，确保了施工质量，降低了成本，提前半个月完成主桥架设任务，并取得了较好的经济效益和社会效益。
The invention discloses a bilateral balance traction device of a steel structure frame bridge and a method thereof, belonging to the field of bridge construction, comprising temporary supports, bridge piers, tank wheels, bridge steel frames, guide bridges, guide bridge tension wires, traction gantry, shrinkage tension Wire, coiling machine and fixed pulley device. By reducing the construction work on the river surface, the present invention has better safety, and the cost of using a hoist for traction is also less. The bilateral balance traction technology of the steel structure frame bridge is a relatively simple and safe construction method. , large operation space, wide operation area, fast construction speed, low cost, etc. This device is used for the traction construction of Daxin Shuolong steel structure frame bridge, which ensures the construction quality and reduces the cost. The main bridge erection is completed half a month ahead of schedule. task, and achieved good economic and social benefits.
Description
Technical Field
The invention relates to the field of bridge construction, in particular to a bilateral balance traction device and method for a steel structure frame bridge.
Background
The existing steel bridges are all installed by using large cranes, but only some small steel bridges can be hoisted by the cranes, and for some large steel bridges, the weight is large and reaches the level of thousands of tons, and hoisting cannot be realized by using the cranes. Especially, the river course can not be directly hoisted by a crane for more than fifty-six meters, so that the construction difficulty is increased. The gantry sliding cable parts are erected on the bank side for installation, construction operation is carried out on the river surface, and the safety is general; erecting a gantry, installing a suspension cable, installing parts and components, and prolonging the construction period; the quality of assembly and welding of parts mounted on the river surface cannot be guaranteed. A large-scale crane with the tonnage of 2 is needed, market resources are limited, the entering and exiting fields are complex, and the shift cost is high, so that the steel structure frame bridge bilateral balance traction device and the method thereof need to be designed, installation and construction of a large-scale steel bridge are further simplified, and the construction efficiency is improved.
Disclosure of Invention
The invention aims to provide a bilateral balance traction device and a bilateral balance traction method for a steel structure frame bridge, and solves the technical problem that the existing large steel bridge of a wide river channel cannot be hoisted.
A bilateral balance traction device of a steel structure frame bridge comprises temporary supports, bridge piers, tank wheels, a bridge steel frame, a guide bridge, guide bridge tension steel wires, a traction portal frame, contraction tension steel wires, a yard rolling machine and a fixed pulley device, wherein the bridge piers are arranged at two sides of a river channel, the temporary supports are arranged between the bridge piers, the tank wheels are arranged at the top ends of the temporary supports and the bridge piers, the bridge steel frame is welded and molded on the tank wheels on one river bank of the river channel, the guide bridge is hoisted and arranged on the river channel, one end of the guide bridge is fixedly connected with the bridge steel frame in a butt joint mode, the other end of the guide bridge is arranged on the tank wheels on one river bank of the river channel, the traction portal frame is arranged at the rear side of the bridge piers, the fixed pulley device is arranged at the rear side of the traction portal frame, the yard rolling machine is arranged at the bottom of the traction portal frame, the, and the other end of the guide bridge tension steel wire is connected with one end of the guide bridge and spans the traction portal frame.
Further, the fixed pulley device includes that pulling force locating plate, muddy earth bury the mound, mix earth foundation pier and bury formula earth anchor entirely, it sets up below the earth's surface to mix earth foundation pier, bury formula earth anchor entirely and fix on muddy earth foundation pier, it buries on burying formula earth anchor entirely to mix earth landfill mound, pulling force locating plate one end is connected with burying formula earth anchor entirely, and the other end and shrink pulling force steel wire sliding connection.
Furthermore, a fixed pulley is arranged on the tension positioning plate, the fixed pulley is fixedly arranged at one end of the tension positioning plate, and the contraction tension steel wire penetrates through the fixed pulley to be arranged in a sliding mode.
Further, the fully-buried ground anchor comprises a bottom plate, side fixing plates and a cross shaft, wherein the bottom plate is fixedly arranged on the concrete foundation pier, the side fixing plates are arranged on the bottom plate, and the cross shaft stretches across between the side fixing plates.
Furthermore, a plurality of bolt holes are formed in the bottom plate, and the bottom plate penetrates through the bolt holes through bolts to be fixed on the concrete foundation pier.
Further, the tank wheel includes PMKD, support column and runner, PMKD fixes the top at pier and temporary support, the support column is vertical to be fixed on PMKD, the rotatable setting of runner is between two support columns.
Furthermore, the size of the guide bridge is the same as that of the bridge steel frame, one end of the guide bridge, which is placed in, is relatively fixed with one end of the bridge steel frame, and the guide bridge is welded and fixed through the steel plate.
A bilateral balance traction method for a steel structure frame bridge comprises the following steps:
step 1: constructing piers according to a designed drawing, arranging temporary supports between the piers, and mounting and fixing tank wheels on the temporary supports and the top ends of the piers;
step 2: assembling and welding bearing truss girders on two sides of a river-crossing bridge steel frame on a temporary support and a pier on one bank side of a river channel, and connecting cross beams to form an integral stable bridge structure after assembling and welding the bearing truss girders on two sides of an axis;
and step 3: calculating the required traction force according to the weight of the bridge structure and the friction factor with the tank wheel, designing a guide bridge according to the traction force and the width of a river channel, welding the guide bridge at two banks, hoisting the guide bridge on the river channel by using a crane, fixedly connecting one end of the guide bridge with one end of a bridge steel frame, and placing the other end of the guide bridge on a temporary support at the other bank and the top end of a pier to install and fix the tank wheel;
and 4, step 4: installing a traction portal frame, embedding a fixed pulley device, installing a guide bridge tension steel wire and a contraction tension steel wire, and calculating traction force required by traction of a frame bridge according to traction weight and traction static friction factors of all supporting points so as to determine the specification and the number of windlasses, and manufacturing the traction portal frame by using box-type steel columns;
and 5: starting a winch to pull the guide bridge to move towards the bank, and driving the bridge steel frame to move towards the other bank by the guide bridge until the bridge steel frame crosses over piers on two banks of the river channel;
step 6: and (4) taking down the tank wheels by using a jack, then disassembling the guide bridge and towing the portal frame, and completing the towing and installation of the bridge steel frame.
Further, in the step 5, the winch is started at the lowest gear, the guide bridge starts to move forwards, the machine is stopped after the front movement is carried out for 100 mm, the inspection is carried out according to the content of the monitoring item standard, the center line of the steel beam, the longitudinal horizontal displacement of the pier top and the deflection of the guide beam are monitored in the traction process, the center line of the steel beam and the longitudinal horizontal displacement of the pier top are observed once every half hour, the center line of the steel beam is monitored by a total station, and the deviation is corrected by a limiter; the pier top longitudinal horizontal displacement is monitored by hanging a plumb ball on the pier top axis extension line, the deflection of the cantilever end is monitored by a level gauge, and when the deflection value of the beam body center line is more than 20mm, the deviation is corrected, so that the bridge is righted. If the longitudinal horizontal displacement of the pier top is close to the calculated value, the tension of the steel hinge line in front of and behind the pier is adjusted, the horizontal displacement is reduced, traction record and stress monitoring are carried out, the internal force of the beam section is tested every 4m of traction, abnormality is found, and the abnormal internal force is timely processed until the bridge is in place for traction.
Furthermore, a main control console is arranged beside the main bridge pier in the step 4, 2 windlasses are controlled to be started and stopped simultaneously to achieve synchronization, centralized control and synchronous operation of two-point traction are achieved, independent work can be started independently, and the fully-buried ground anchor is made of C25-grade concrete and mainly bears the reaction force of traction and the upward uplift resistance.
By adopting the technical scheme, the invention has the following technical effects:
the invention has better safety by reducing the construction operation on the river surface, the cost of a winch for traction is less, the bilateral balance traction technology of the steel structure frame bridge is a simpler and safer construction method, and the device has the characteristics of simple equipment process, shore assembly, large operation space, wide operation surface, high construction speed, low cost and the like.
Drawings
Fig. 1 is a cross-sectional view of a draft gear of the present invention.
Fig. 2 is a schematic view of the bridge structure of the present invention.
Fig. 3 is a schematic structural view of the fully buried ground anchor of the present invention.
FIG. 4 is a schematic view of the tank wheel structure of the present invention.
Fig. 5 is an enlarged view of a in fig. 1.
FIG. 6 is a schematic view of a pilot bridge checking analysis according to the present invention.
FIG. 7 is a flow chart of the bridge steel frame installation process of the present invention.
Reference numbers in the figures: 1. a temporary support; 2. a bridge pier; 3. a tank wheel; 3.1, fixing the bottom plate; 3.2, supporting columns; 3.3, rotating wheels; 4. a bridge steel frame; 5. a bridge; 6. a bridge wire tension steel wire; 7. dragging the portal frame; 8. contracting the tension steel wire; 9. a tension positioning plate; 10. burying piers with concrete; 11. concrete foundation piers; 12. a fully buried ground anchor; 12.1, a bottom plate; 12.2, bolt holes; 12.3, fixing a lateral side plate; 12.4, horizontal axis; 13. a field winding machine; 14. a river channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, preferred embodiments are given and the present invention is described in further detail. It should be noted, however, that the numerous details set forth in the description are merely for the purpose of providing the reader with a thorough understanding of one or more aspects of the present invention, which may be practiced without these specific details.
As shown in figure 1, the bilateral balance traction device for the steel structure frame bridge comprises a temporary support 1, a pier 2, tank wheels 3, a bridge steel frame 4, a guide bridge 5, a guide bridge tension steel wire 6, a traction portal frame 7, a contraction tension steel wire 8, a field winding machine 13 and a fixed pulley device. The piers 2 are arranged at two sides of the river channel 14, the temporary supports 1 are arranged between the piers 2 and the piers 2, the tank wheels 3 are arranged at the top ends of the temporary support 1 and the bridge piers 2, the bridge steel frame 4 is welded and molded on the tank wheels 3 on the river bank at one side of the river channel 14, the guide bridge 5 is hoisted and arranged on the river channel 14, one end of the guide bridge is fixedly butted with the bridge steel frame 4, the other end of the guide bridge is arranged on the tank wheel 3 on the river bank at one side of the river channel 14, the traction portal frame 7 is arranged at the rear side of the pier 2, the fixed pulley device is arranged at the rear side of the traction portal frame 7, the field winding machine 13 is arranged at the bottom of the traction portal frame 7, the traction portal frame 7 is connected with the bridge guide tension steel wire 6 through a contraction tension steel wire 8 by a fixed pulley device, and the other end of the guide bridge tension steel wire 6 is connected with one end of the guide bridge 5 and spans the traction portal frame 7.
Bridge steel frame 4 welds well in the one side of river course 14, and approximately 750 tons of bridge steel frame 4 use the hoist to be unable to hoist, then the access bridge 5 directly spanes on the river course, and approximately 32 tons of access bridge 5 can directly use general hoist installation on both sides. The bridge guide tension steel wires 6 are arranged in a plurality, collected on a hook and spanned on the traction portal frame 7, when the traction portal frame 7 is used for keeping the bridge guide 5, the force is horizontal and transverse, and the height of the traction portal frame 7 is close to that of the temporary support 1 and the bridge pier 2. The fixed pulley device is used as a counterforce and is also equivalent to a stator, so that when the field winding machine 13 rotates, the contraction tension steel wire 8 contracts, and the fixed pulley device is fixed.
In the embodiment of the invention, the fixed pulley device comprises a tension positioning plate 9, a concrete buried pier 10, a concrete foundation pier 11 and a fully-buried ground anchor 12, wherein the concrete foundation pier 11 is arranged below the ground surface, the fully-buried ground anchor 12 is fixed on the concrete foundation pier 11, the concrete buried pier 10 is buried on the fully-buried ground anchor 12, one end of the tension positioning plate 9 is connected with the fully-buried ground anchor 12, and the other end of the tension positioning plate is in sliding connection with a contraction tension steel wire 8. The concrete foundation pier 11 is arranged at the position two meters away from the ground surface and is poured by concrete, the side edge of the concrete foundation pier 11 is larger than the fully-buried ground anchor 12, and then the fully-buried ground anchor 12 is fixed and then the concrete is poured from top to bottom to form the concrete landfill pier 10. Two or one tension lock plates 9 can be provided as a backup to prevent breakage or something during the tension process.
In the embodiment of the invention, a fixed pulley is arranged on the tension positioning plate 9, the fixed pulley is fixedly arranged at one end of the tension positioning plate 9, and the contraction tension steel wire 8 passes through the fixed pulley and is arranged in a sliding manner. The end of the tension positioning plate 9, which is provided with the fixed pulley, is arranged in a fork structure, and the fixed pulley is arranged in the middle of the fork structure to form a fixed pulley structure.
In the embodiment of the invention, the fully-buried ground anchor 12 comprises a bottom plate 12.1, side fixing plates 12.3 and a transverse shaft 12.4, wherein the bottom plate 12.1 is fixedly arranged on the concrete foundation pier 11, the side fixing plates 12.3 are arranged on the bottom plate 12.1, and the transverse shaft 12.4 spans between the side fixing plates 12.3. The fixing plate 12.3 is used as an integral force-exerting structure, and then the transverse shaft 12.4 can adjust the specific angle of the tension positioning plate 9 during installation, so that the requirement of tension is better met. The bottom plate 12.1 is provided with a plurality of bolt holes 12.2, and the bottom plate is fixed on the concrete foundation pier 11 through bolts penetrating through the bolt holes 12.2. The use of bolt holes 12.2 for passing bolts can increase the force of the bottom plate 12.1 in the vertical direction.
In the embodiment of the invention, the tank wheel 3 comprises a fixed bottom plate 3.1, support columns 3.2 and a rotating wheel 3.3, the fixed bottom plate 3.1 is fixed at the tops of the bridge piers 2 and the temporary support 1, the support columns 3.2 are vertically fixed on the fixed bottom plate 3.1, and the rotating wheel 3.3 is rotatably arranged between the two support columns 3.2. The fixed bottom plate 3.1 is fixed with the bridge pier 2 and the temporary support 1 through bolts and screws, and meanwhile, the mounting position of a later-stage jack is reserved on the side edge. The rotating wheel 3.3 is used as a rotating wheel for sliding friction, and the supporting column 3.2 mainly acts on supporting force in the vertical direction.
In the embodiment of the invention, the size of the guide bridge 5 is the same as that of the bridge steel frame 4, one end of the guide bridge 5, which is placed in, is relatively fixed with one end of the bridge steel frame 4, and the guide bridge is welded and fixed through the steel plate. Because the guide bridge 5 and the bridge steel frame 4 are arranged oppositely, the guide bridge 5 and the bridge steel frame 4 are supported relatively in the pulling process, the situation of falling down can not occur, and the problem of installation of a large-scale steel bridge crossing a remote river surface is well solved.
A bilateral balance traction method for a steel structure frame bridge comprises the following steps:
step 1: the construction method comprises the steps of constructing a pier 2 according to a designed drawing, arranging temporary supports 1 between the pier 2 and the pier 2, and arranging fixed tank wheels 3 on the top ends of the temporary supports 1 and the pier 2. The design drawing is set according to the requirements of relevant national standards and requirements. By
Step 2: the bearing truss girders at two sides of the river-crossing bridge steel frame 4 are assembled and welded on the temporary support 1 and the pier 2 on the bank side at one side of the river channel 14, and the bearing truss girders at two sides of the axis are assembled and welded to connect the cross beams to form an integral stable bridge structure. The frame main beam is of a truss structure, the span is large, and based on site conditions and road transportation conditions, the frame structure is processed in a segmented mode in a factory and then transported to a site for assembly and installation in segments. The frames 71HJ1 and 72HJ1 are integrally manufactured in a workshop and transported to the site in sections. After being spliced and welded into a whole on the ground, the combined type column pier can be horizontally laid on a column pier to be combined together as a splicing platform and an auxiliary platform. And sliding trolleys (flat tank trolleys) are arranged on the south quay pier and the temporary strut platform, and 2-side bearing truss beams 73HJ1 and 73HJ2 of the river-crossing frame beam are spliced and welded. The bearing truss girders on two sides of the axis are assembled and welded, and the connecting beams form an integral stable structure. The overall component structure has the dimensions of length, width and height: 60.65m × 5.1 m × 16 m, the total amount is about 400-450 t. The structure form of head light and tail heavy is adopted.
And step 3: according to the weight of crane span structure and with tank 3 friction factor calculation needs traction force size, then design the lead bridge 5 according to traction force size and the width of river course 14, weld the lead bridge 5 at both sides, then use the crane hoist and mount on river course 14, the one end of lead bridge 5 and the one end fixed connection of bridge steelframe 4, the other end is placed on the fixed tank 3 of the top installation of another bank temporary stand 1 and pier 2.
And 4, step 4: installing a traction portal frame 7, embedding a fixed pulley device, installing a guide bridge tension steel wire 6 and a contraction tension steel wire 8, calculating traction force required by frame bridge traction according to traction weight and traction static friction factors of all pivots, determining the specification and the number of the windlasses 13, and manufacturing the traction portal frame 7 by using box-type steel columns. A main control console is arranged beside a main bridge pier, 2 windlasses are controlled to be started and stopped simultaneously to achieve synchronization, centralized control and synchronous operation of two-point traction are achieved, independent work can be started independently, and the fully-buried ground anchor is made of C25-grade concrete and mainly bears the reaction force of traction and upward uplift resistance.
And 5: the winch 13 is started to pull the guide bridge 5 to move towards the bank, and the guide bridge 5 drives the bridge steel frame 5 to move towards the other bank together until the bridge steel frame 5 stretches across the piers 2 on the two banks of the river channel 14.
Starting the winch 13 at the lowest gear, starting the guide bridge 5 to move forwards, stopping the machine after the guide bridge moves for 100 mm, checking according to the content of a monitoring item standard, monitoring the center line of the steel beam, the longitudinal horizontal displacement of the pier top and the deflection of the guide beam in the traction process, observing the center line of the steel beam and the longitudinal horizontal displacement of the pier top once every half hour, monitoring the center line of the steel beam by using a total station, and correcting the deviation by using a limiter; the pier top longitudinal horizontal displacement is monitored by hanging a plumb ball on the pier top axis extension line, the deflection of the cantilever end is monitored by a level gauge, and when the deflection value of the beam body center line is more than 20mm, the deviation is corrected, so that the bridge is righted. If the longitudinal horizontal displacement of the pier top is close to the calculated value, the tension of the steel hinge line in front of and behind the pier is adjusted, the horizontal displacement is reduced, traction record and stress monitoring are carried out, the internal force of the beam section is tested every 4m of traction, abnormality is found, and the abnormal internal force is timely processed until the bridge is in place for traction.
Step 6: the tank wheels 3 are taken down by using a jack, then the guide bridge 5 is disassembled and the portal frame 7 is pulled, and the bridge steel frame 4 is pulled and installed.
The practical engineering place is in major dragon town of great new county in Guangxi, and the main channel is divided into two parts, wherein the river-adjacent part is of a steel frame structure. The design benchmark period adopted by the engineering structure is 50 years, the structural design service life is 50 years, and the safety level of the steel structure is two levels. The bridge is a continuous steel structure system, and is arranged in a whole frame structure.
The engineering is a classical bridge model, a main body of the engineering is a river-crossing frame bridge, the river-crossing structure has a span of 60.65m, the width of 16 m and the total weight of 750 tons. The process of towing installation and weld quality control will be one of the major engineering concerns.
After the frame beams on the sides are assembled and welded on the south shore, the cross beams of the connecting parts form an integral stable structure and then are led to the bridge pier foundation of the north shore, and the whole traction and installation process is a difficult point of engineering.
According to the field conditions, carrying out scheme design analysis: if the gantry sliding cable parts are erected on the bank side for installation, construction operation is carried out on the river surface, and the safety is general; erecting a gantry, installing a suspension cable, installing parts and components, and prolonging the construction period; the quality of assembly and welding of parts mounted on the river surface cannot be guaranteed. The crane with large tonnage is needed, the market resources are limited, the entering and exiting are complicated, and the machine shift cost is high. And finally, the main bridge is selected to be assembled and manufactured on the south bank and then integrally pulled to the north bank, so that the construction operation on the river surface is reduced, and the safety is better. The cost of the winch used for traction is less. The bilateral balance traction technology for the steel structure frame bridge is a simple, convenient and safe construction method, and has the characteristics of simple equipment process, onshore splicing, large operation space, wide operation range, high construction speed, low cost and the like. The method is used for traction construction of the large and new large and long steel structure frame bridge, ensures the construction quality, reduces the cost, completes the main bridge erection task in half a month in advance, and obtains better economic benefit and social benefit.
A. And (3) stopping the north bank traction winch: and determining the hoisting working position according to the hoisting design requirement of the frame bridge traction, and installing the hoop and the cushion block after positioning so as to carry out hoisting work.
B. And acquiring a conventional weather forecast within 24 hours before hoisting to ensure that the weather condition can be accepted, and observing the river water change condition by combining the weather condition to ensure that the storm condition can be accepted.
C. The hoisting safety of the frame bridge is ensured: any equipment and parts are fixed, and safety railings are arranged on the periphery of the equipment and the parts. Any additional weight on the beam section, such as counterweights and components, must be checked to ensure that they are evenly distributed and within the safe hoisting capacity of the hoist.
D. And checking whether safety devices and protective devices of the hoisting machinery are complete or not and whether a control system and a braking system are normal or not. And (5) checking whether the rope clamp, the fixture and the like are deformed, cracked, abraded and other abnormal conditions.
E. And (4) the installation and correction of the inspection supporting platform and the sliding support are completed, the on-site elevation and the axis rechecking and correction are completed, and the installation and construction requirements are met.
F. The winch and the related pulley block are fixed according to the actual situation on site, the steel wire rope required to be pulled is parallel to the bottom end beam when being stressed, and the tank wheel trolley is lubricated by grease as much as possible.
G. All measuring instruments and tools are required to be sent to relevant departments for detection before use according to relevant quality management regulations, and can be used after qualified certificates of the relevant quality picking departments are obtained. During the use process, related personnel should frequently carry out self-checking and self-calibration on the used instruments and tools so as to keep the instruments and tools in a good state.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be construed as the protection scope of the present invention.
Claims (10)
1. The utility model provides a bilateral balanced draw gear of steel frame bridge which characterized in that: comprises a temporary support (1), piers (2), tank wheels (3), a bridge steel frame (4), a guide bridge (5), guide bridge tension steel wires (6), a traction portal frame (7), contraction tension steel wires (8), a field rolling machine (13) and a fixed pulley device, wherein the piers (2) are arranged at two sides of a river channel (14), the temporary support (1) is arranged between the piers (2) and the piers (2), the tank wheels (3) are arranged at the top ends of the temporary support (1) and the piers (2), the bridge steel frame (4) is welded and formed on the tank wheels (3) on one side of the river bank of the river channel (14), the guide bridge (5) is hoisted and arranged on the river channel (14), one end of the guide bridge is fixedly connected with the bridge steel frame (4), the other end of the guide bridge steel frame is arranged on the tank wheels (3) on one side of the river bank of the river channel (14), the traction portal frame (7) is arranged at the rear side of, the fixed pulley device is arranged on the rear side of the traction portal frame (7), the yard rolling machine (13) is arranged at the bottom of the traction portal frame (7), the traction portal frame (7) is connected with the guide bridge tension steel wire (6) through the fixed pulley device by virtue of the contraction tension steel wire (8), and the other end of the guide bridge tension steel wire (6) is connected with one end of the guide bridge (5) and stretches across the traction portal frame (7).
2. The bilateral balanced draft gear of a steel structural frame bridge of claim 1, wherein: the fixed pulley device comprises a tension positioning plate (9), a concrete landfill pier (10), a concrete foundation pier (11) and a fully-buried ground anchor (12), the concrete foundation pier (11) is arranged below the ground surface, the fully-buried ground anchor (12) is fixed on the concrete foundation pier (11), the concrete landfill pier (10) is buried on the fully-buried ground anchor (12), one end of the tension positioning plate (9) is connected with the fully-buried ground anchor (12), and the other end of the tension positioning plate is connected with a shrinkage tension steel wire (8) in a sliding mode.
3. The bilateral balanced draft gear of a steel structural frame bridge of claim 2, wherein: the tension positioning plate (9) is provided with a fixed pulley, the fixed pulley is fixedly arranged at one end of the tension positioning plate (9), and the contraction tension steel wire (8) penetrates through the fixed pulley to be arranged in a sliding mode.
4. The bilateral balance draft gear and the method thereof for the steel structure frame bridge according to claim 2, wherein: fully buried ground anchor (12) includes bottom plate (12.1), side dead plate (12.3) and cross axle (12.4), bottom plate (12.1) is fixed to be set up on concrete foundation pier (11), side dead plate (12.3) set up on bottom plate (12.1), cross axle (12.4) span between side dead plate (12.3).
5. The bilateral balanced draft gear of a steel structural frame bridge of claim 4, wherein: the bottom plate (12.1) is provided with a plurality of bolt holes (12.2), and the bolt holes (12.2) are penetrated through bolts to be fixed on the concrete foundation pier (11).
6. The bilateral balanced draft gear of a steel structural frame bridge of claim 1, wherein: tank wheel (3) are including PMKD (3.1), support column (3.2) and runner (3.3), PMKD (3.1) are fixed at the top of pier (2) and temporary support (1), support column (3.2) are vertical to be fixed on PMKD (3.1), runner (3.3) rotatable setting is between two support columns (3.2).
7. The bilateral balanced draft gear of a steel structural frame bridge of claim 1, wherein: the size of the guide bridge (5) is the same as that of the bridge steel frame (4), one end of the guide bridge (5) is arranged to be relatively fixed with one end of the bridge steel frame (4), and the guide bridge is welded and fixed through the steel plate.
8. The bilateral balanced hauling method of a steel structural frame bridge according to any one of claims 1 to 7, comprising the steps of:
step 1: constructing a pier (2) according to a designed drawing, arranging temporary supports (1) between the pier (2) and the pier (2), and mounting and fixing tank wheels (3) on the top ends of the temporary supports (1) and the pier (2);
step 2: assembling and welding bearing truss girders on two sides of a river-crossing bridge steel frame (4) on a temporary support (1) and a pier (2) on the bank side on one side of a river channel (14), and connecting cross beams to form an integral stable bridge structure after assembling and welding the bearing truss girders on two sides of an axis;
and step 3: calculating the required traction force according to the weight of the bridge structure and the friction factor with the tank wheel (3), designing a guide bridge (5) according to the traction force and the width of a river channel (14), welding the guide bridge (5) at two sides, hoisting the guide bridge on the river channel (14) by using a crane, fixedly connecting one end of the guide bridge (5) with one end of a bridge steel frame (4), and placing the other end of the guide bridge on the top ends of a temporary support (1) at the other side and a pier (2) to install and fix the tank wheel (3);
and 4, step 4: installing a traction portal frame (7), burying a fixed pulley device, installing a guide bridge tension steel wire (6) and a contraction tension steel wire (8), calculating traction force required by frame bridge traction according to traction weight and traction static friction factors of all pivots, determining the specification and the number of winches (13), and manufacturing the traction portal frame (7) by using box-type steel columns;
and 5: starting a winch (13) to pull a guide bridge (5) to move towards the bank, wherein the guide bridge (5) drives a bridge steel frame (5) to move towards the other bank together until the bridge steel frame (5) stretches across piers (2) at two banks of a river channel (14);
step 6: and the tank wheels (3) are taken down by using a jack, then the guide bridge (5) is disassembled and the portal frame (7) is pulled, and the bridge steel frame (4) is pulled and installed.
9. The bilateral balance traction method of the steel structure frame bridge according to claim 8, wherein in the step 5, the winch (13) is started to be in the lowest gear, the guide bridge (5) starts to move forward, the machine is stopped after the guide bridge moves forward for 100 mm, the inspection is carried out according to the standard content of the monitoring item, the center line of the steel beam, the longitudinal horizontal displacement of the pier top and the deflection of the guide beam are monitored in the traction process, the center line of the steel beam and the longitudinal horizontal displacement of the pier top are observed once every half hour, the center line of the steel beam is monitored by a total station, and the position limiter is used for correcting the deviation; the pier top longitudinal horizontal displacement is monitored by hanging a plumb ball on the pier top axis extension line, the deflection of the cantilever end is monitored by a level gauge, and when the deflection value of the beam body center line is more than 20mm, the deviation is corrected, so that the bridge is righted. If the longitudinal horizontal displacement of the pier top is close to the calculated value, the tension of the steel hinge line in front of and behind the pier is adjusted, the horizontal displacement is reduced, traction record and stress monitoring are carried out, the internal force of the beam section is tested every 4m of traction, abnormality is found, and the abnormal internal force is timely processed until the bridge is in place for traction.
10. The bilateral balance traction method of the steel structure frame bridge according to claim 8, wherein a master control station is arranged beside a master pier in the step 4, 2 windlasses are controlled to be started and stopped simultaneously to achieve synchronization, so that centralized control and synchronous operation of two-point traction are realized, independent work can be independently started, and the fully-buried ground anchor is made of C25-grade concrete and mainly bears the reaction force of traction and upward uplift resistance.
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