WO2022037327A1

WO2022037327A1 - Method for erecting large-radian curved steel box girder bridge deck

Info

Publication number: WO2022037327A1
Application number: PCT/CN2021/106192
Authority: WO
Inventors: 虞华; 葛勇; 李亮; 顾亚
Original assignee: 上海振华港机重工有限公司
Priority date: 2020-08-18
Filing date: 2021-07-14
Publication date: 2022-02-24
Also published as: CN111945580A; CN111945580B

Abstract

Disclosed is a method for erecting a large-radian curved steel box girder bridge deck. The method comprises: improving a rear support system of a bridge girder erecting machine; arranging two rear support transverse moving traveling devices at a lower cross beam longitudinal moving wheel box group of a rear support leg; during curved hole passing of the bridge girder erecting machine, using a middle support point longitudinal moving wheel box and a power group, and a rear support longitudinal moving wheel box and a power group to enable a main girder to move on a middle support reverse riding wheel box, such that after a front support part of the main girder arrives above a front pier, a rear support point transversely adjusts the bridge girder erecting machine according to an oblique crossing angle; utilizing a front support oil cylinder to put a front lower cross beam in place, adjusting the height and level of the bridge girder erecting machine, and finally fixing the whole bridge girder erecting machine; and completing curved hole passing work and then enabling the beam to be erected. The present invention utilizes the lever principle to control the center of gravity of one end of the bridge girder erecting machine, so that the bridge girder erecting machine maintains its overall balance and completes large-radian curved hole passing.

Description

A method for erecting a bridge deck of a large arc curved steel box girder

technical field

The invention relates to a steel bridge erection technology, and more particularly, to a method for erecting a steel box girder bridge deck with a large arc curve.

Background technique

As a large-scale special equipment in bridge construction, bridge erection machine has become an indispensable key equipment in the construction of steel bridge wading. The bridge erection machine is a key process in beam erection construction, and it is also prone to safety accidents. Hazardous process.

Please refer to Figure 1. The structure of the existing double guide beam triangular truss bridge erection machine mainly includes main beam 1, rear support system 2, middle support system 3, front support system 4, front crane 5, rear crane 6 and hydraulic Lifting system, etc. The main beam 1 is welded by section steel, and the front and rear ends are connected and fixed by section steel, which meets the functional requirements of supporting the crane running above it and bearing the weight of the steel box beam. The rear support system 2 is a supporting beam, with a telescopic cylinder and a vertical and horizontal walking device, which can realize walking, jacking and bearing, and meet the functional requirements of the bridge erecting machine, such as longitudinal travel, passing through holes and adjusting the height of the bridge erecting machine. The middle support system 3 is equipped with a combination of reverse supporting rollers, which can be longitudinally moved, laterally moved and loaded, and can meet the functional requirements of the bridge erecting machine such as longitudinal movement through holes and overall lateral movement. The front support system 4 is a supporting beam and a telescopic cylinder system, which can meet the functional requirements of adjusting the height of the bridge erection machine, carrying the bridge erection machine and the weight of the bridge deck steel box girder. The front crane 5 and the rear crane 6 move longitudinally on the main beam 1, and realize their own lateral running on the crane beam.

In the construction process of wading steel bridge erection, when encountering the following conditions: the span is less than 50 meters, the longitudinal slope is less than 4%, the turning radius is 220 to 260 meters, and the turning angle is less than 36°. The size of the structure is fixed during production. Only the middle support system is used to move the bridge erection machine as a whole, and the longitudinal truss girder cannot be moved to the required curve and oblique angle. When the angle is intersected, the hole cannot be passed smoothly according to the curve angle.

technical problem

In view of the above-mentioned defects existing in the prior art, the purpose of the present invention is to provide a method for erecting a large-curved steel box girder bridge deck, which utilizes the lever principle to control the center of gravity of one end of the bridge erecting machine, so that the bridge erecting machine maintains the overall balance, and completes the Large arc curve vias.

technical solutions

To achieve the above object, the present invention adopts the following technical solutions:

A method for erecting a large radian curved steel box girder bridge deck, comprising the following steps:

1) The bridge erection machine reaches the preparation position before the curved via;

2) Start the front and rear outrigger cylinders of the bridge erecting machine to lift the main beam, so that the middle support roller set of the middle outrigger is separated from the lower part of the main beam;

3) Use the front crane to hoist the middle support roller set and the middle support traverse track to the position where the front end of the beam plate has been erected, and place the middle support traverse track so that the middle support traverse track is parallel to the front pier. Fixed middle outrigger support beam track and wheel box group;

4) Lower the front and rear outrigger cylinders, and drop the main beam on the middle-supporting reverse roller set;

5) Start the front outrigger oil pump, fold the front outrigger, and then move the front crane and the rear crane to the position above the rear outrigger;

6) Activate the hydraulic cylinder of the rear outrigger to lower the height of the rear end of the main beam, so that the main beam is in a tilted state with a high front end and a low rear end;

7) Install a track under the rear support longitudinal moving wheel box of the rear outrigger, use the back-supporting longitudinal moving wheel box group of the middle outrigger as a sliding support, and use the rear support longitudinal moving traveling device of the rear outrigger to drive the main beam. The front end, the front outrigger and the lower beam of the front outrigger are moved forward to the top of the front bridge pier;

8) Install the traverse wheel box on the back side of the rear support longitudinal wheel box, and lay the traverse track, take the reverse support vertical shift wheel box group of the middle support as the fulcrum, and use the rear support transverse movement traveling device of the rear support to drive , and finally adjust the front support beam to be parallel to the middle support beam track and the front pier;

9) Drop the lower beam of the front outrigger on the front pier, and fix the front outrigger;

10) Fix the bridge erection machine as a whole to complete the curve through hole.

Preferably, the step 1) the preparation position before the bridge erection machine reaches the curved through hole further includes placing the front legs of the bridge erection machine on the position of the bridge pier at the front end of the girder slab that has been erected, and the middle legs on the erected bridge piers. At the position of the bridge pier in the middle of the beam plate, the rear outrigger is placed at the position where the rear end of the beam plate has been erected, and the front crane and the rear crane are moved to the position above the middle outrigger. After the bridge erecting machine, the crane beam and the main beam connecting beam (front and rear) rigidly connect the front and rear ends of the main beams on both sides of the bridge erecting machine to ensure the fixed size of the front and rear beams of the bridge erecting machine, so as to ensure that the whole bridge erecting machine can be lifted Stable when transporting steel box girders.

Preferably, in the step 3) before fixing the middle support beam track and the wheel box group, the distance between the two reverse supporting wheel groups is adjusted to a position corresponding to the lower part of the main beam.

Preferably, the inclination of the main beam in step 6) is less than or equal to 4%.

Preferably, the step 8) is driven by the rear support lateral movement traveling device of the rear support, that is, by adjusting the position of the rear end of the bridge erection machine laterally in a small range, the front end of the bridge erection machine can be moved laterally in a large amount. During the lateral adjustment process, the driving speed of the rear support lateral moving device should not exceed 1 m/min

Preferably, in the process of fixing the front legs in step 9), the front, middle and rear support systems should be adjusted first, and the main beam should be adjusted to a horizontal state or an inclined state with a high front end of the main beam.

beneficial effect

The method for erecting a large-curved steel box girder bridge deck provided by the present invention also has the following beneficial effects:

1) The more traditional curve via time is increased from 3 days to 1 day;

2) The middle support roller set is relatively fixed, which reduces the number of lateral movements of the middle support wheel set, reduces the overturning risk of the bridge erection machine caused by the lateral movement of the middle support wheel set, and greatly improves the safety factor;

3) The operation procedures such as the adjustment before the front outriggers pass through the holes and the counterweight of the tail box girder of the bridge erection machine before the holes are reduced, and the work efficiency is improved;

4) The original at least 8 people can work together to complete the curved hole of the bridge erection machine, and reduce it to 5 people to complete the curved hole of the bridge erection machine;

5) By pre-positioning the position of the lower beam of the middle support, the state of the bridge erection machine can be flexibly adjusted according to the angle between the bridge deck and the longitudinal alignment of the bridge erection machine, and the operating conditions of the bridge deck.

Description of drawings

Fig. 1 is the structural schematic diagram of the existing bridge erecting machine;

Fig. 2 is the cross-sectional structure schematic diagram that the rear support system of the bridge erection machine is improved by the method for erecting the bridge deck of the large-radian curved steel box girder according to the present invention;

3 is a schematic diagram of step 1) in the method for erecting a large-curved steel box girder bridge deck of the present invention;

Fig. 4 is the bottom view of Fig. 3;

5 is a schematic diagram of step 2) to step 4) in the method for erecting a large-curved steel box girder bridge deck of the present invention;

Fig. 6 is the bottom view of Fig. 5;

Fig. 7 is the schematic diagram of step 5) to step 6) in the method for erecting a large arc curved steel box girder bridge deck of the present invention;

Fig. 8 is the bottom view of Fig. 7;

FIG. 9 is a schematic diagram of step 7) in the method for erecting a bridge deck of a large-curved curved steel box girder according to the present invention;

Fig. 10 is the bottom view of Fig. 9;

FIG. 11 is a schematic diagram of step 10) in the method for erecting a large arc curved steel box girder bridge deck of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

In the method for erecting a bridge deck of a large-curved steel box girder provided by the present invention, please refer to Fig. 2. First, the rear support 2 system of the bridge erection machine is improved. The rear support system consists of a hydraulic jacking device 7, a rear support Legs 8, rear support longitudinal moving wheel box 9, rear support longitudinal moving rail 16 and rear lower beam 10, etc., meet the technical requirements of the bridge erecting machine, such as vertical and horizontal travel, passing through holes and adjusting the height of the bridge erecting machine.

The acquired crane 11 transmits power to the crane wheels through the main beam 12 of the acquired crane, so as to realize the longitudinal movement on the crane track 13 and the lateral operation along the main beam 12 of the acquired crane.

The rear crane beam 14 and the main beam connecting beam 23 (divided into front and rear) rigidly connect the front and rear ends of the main beam 1 on both sides of the bridge erecting machine to ensure that the front and rear crosspieces of the bridge erecting machine 100 are fixed in size, so as to ensure that the overall bridge erecting machine is in Stable when lifting steel box girder.

The hydraulic jacking device 7 is composed of an oil pump, an oil pipe, an oil cylinder, etc. The front outrigger 18 and the rear outrigger 8 are equipped with a hydraulic system, through which the level of the bridge erecting machine can be adjusted and the auxiliary work of the bridge erecting machine can be completed. .

The rear support traverse travel device 15 is welded at the tail of the rear support longitudinal moving wheel box 9, and the power is output to the wheels on the rear support temporary traverse track 17, so as to satisfy the traverse travel of the tail of the bridge erecting machine and the adjustment of the via hole to the predetermined position.

The method for erecting a bridge deck of a large-radian curved steel box girder of the present invention specifically includes the following steps:

1) The bridge erection machine 100 arrives at the preparation position before the curved hole. Specifically, the front outrigger 18 of the bridge erection machine 100 is placed on the position of the bridge pier 19 at the front end of the girder plate 200 that has been erected, and the middle outrigger 20 is placed on the already erected position. At the position of the bridge pier 21 in the middle of the girder plate 200, the rear outrigger 8 is placed at the position where the rear end of the girder plate 200 has been erected, and the front crane 22 and the rear crane 11 are moved to the position above the middle support 3. The center line 101 of the front end is basically consistent with the center line 201 of the beam plate 200 that has been erected, as shown in FIG. 3 and FIG. 4 ;

2) Start the front and rear outrigger oil cylinders of the bridge erecting machine 100 to lift the main beam connecting beam 23, so that the middle support roller set of the middle outrigger 20 is separated from the main beam connecting beam 23;

3) Use the front crane 22 to lift the middle support roller set and the middle support traverse track 24 to the position where the front end of the beam plate 200 has been erected, and place the middle support traverse track 24 so that the middle support traverse track 24 is connected to the front. The pier 25 is parallel, and the middle outrigger wheel box group is fixed to prevent it from sliding left and right after being stressed;

4) Lower the front and rear outrigger oil cylinders, drop the main beam connecting beam 23 on the middle support reverse roller set 20, make the main beam 1 and the middle support reverse roller flange parallel, and ensure that the main beam 1 is in a horizontal state. Prepare vias, as shown in Figure 5 and Figure 6;

5) Start the front outrigger oil pump, retract the front outrigger 18, and then move the front crane 22 and the rear crane 11 to the position above the rear outrigger 8, and level the center of gravity of the main beam 1;

6) Activate the hydraulic cylinder of the rear outrigger to lower the height of the rear end of the main beam 1, so that the main beam 1 is in an inclined state with a high front end and a low rear end, and the inclination of the main beam 1 is less than or equal to 4%;

7) Install the rear support longitudinal movement track 16 under the rear support longitudinal movement wheel box 9 of the rear support leg 8, use the back support longitudinal movement wheel box group of the middle support leg 20 as a sliding support, and use the rear support longitudinal movement of the rear support leg 8. The moving device is driven, so that the front end of the main beam 23, the front outriggers 18 and the lower cross beam 26 of the front outriggers are moved forward to the top of the front bridge pier 25, as shown in Figures 7 and 8;

8) Weld the rear support traverse travel device 15 at the tail of the rear support longitudinal shift wheel box 9, and output the power to the support transverse travel device 15 to temporarily traverse the track 17 on the rear support, and adjust the front leg lower beam 26 to the center. The support rail 24 and the front bridge pier 25 are parallel, at this time, the middle outrigger 20 and the front outrigger 18 have been matched with the center line 201 of the erected beam plate 200, as shown in Figures 9 and 10;

9) Start the front outrigger oil cylinder, jack up the hydraulic jack, adjust the height of the main beam 1, drop the front outrigger lower beam 26 on the front bridge pier 25, and fix it. The bridge erection machine 100 should be as horizontal as possible or the front end is slightly higher ;

10) Fix the bridge erection machine 100 as a whole to complete the curved hole. At this time, the front crane 22 and the rear crane 11 move to the positions above the rear outriggers 8 to prevent the overall center of gravity of the bridge erecting machine 100 from destabilizing, as shown in FIG. 11 .

The main features of the method for erecting the bridge deck of the large-radian curved steel box girder of the present invention are as follows:

1) The rear outrigger traverse travel device 15 is added to the rear outrigger 8, which greatly reduces the difficulty of using the middle outrigger 20 to traverse, and can adapt to any angle curved bridge deck below 36°;

2) Weld the rear support transverse travel device 15 at the tail of the rear support longitudinal shift wheel box 9, which is convenient and quick to install and disassemble;

3) The rear support traverse travel device 15 of the bridge erecting machine 100 is composed of two double-wheel boxes, the middle support anti-roller 20 is in contact with the main beam 23, and after the longitudinal movement of the bridge machine is realized through the hole, the middle support leg 20 is not carried out. In the case of overall lateral movement, the rear support lateral movement traveling device 15 can quickly realize the lateral movement of the front support system of the bridge erecting machine 100;

4) Adopt 2 supporting point curve through hole scheme, the front supporting point is the front outrigger 18 with a telescopic cylinder, the middle supporting point is the middle outrigger 20 with a reverse roller set, and the rear supporting point is the telescopic cylinder and the longitudinal , The rear outriggers 8 that travel laterally, and the rear support traverse travel device 15 are set up, which can effectively decompose the pressure of the bridge erecting machine 100 when it moves laterally, stabilize the center of gravity of the entire bridge erecting machine 100, and can effectively Avoid the risk of overturning of the bridge machine 100 that may be caused by the overall traversing bridge erection machine 100 of the middle branch traverse wheel box, and realize safe passage;

5) The installation of the rear support transverse travel device 15 solves the problem of installing the front support leg lower cross beam 26. The front support leg lower cross beam 26 is pre-welded on the front support leg 18, and the middle support leg is used to support the longitudinal moving wheel. The box group 20 is supported by the relative center of the circle, and is driven by the rear outrigger traverse travel device 15. After the front outrigger 18 is longitudinally moved above the front bridge pier 25, the bridge erection machine can be driven by a small lateral movement at the tail of the bridge erection machine 100. The front end of the bridge erection machine 100 moves laterally as a whole, so that the front legs 18 of the bridge erecting machine 100 are adjusted to the proper position of the bridge pier 25 .

The method for erecting the bridge deck of the large-radian curved steel box girder of the present invention is by pre-positioning the lower cross beam of the middle support of the bridge erecting machine, instead of the general method of pre-positioning the lower cross beam of the front support, so as to realize that after the longitudinal movement of the bridge machine passes through the hole, the middle support is not integrated. In the case of lateral movement, two supporting points are used, the front supporting point is the front outrigger 18 with a telescopic cylinder, and the rear supporting point is the rear outrigger 8 with a telescopic cylinder and vertical and horizontal walking. The middle support point is the middle outrigger 20 with the reverse supporting wheel group, the middle supporting wheel and the main girder 23 are contacted without force, and are supported as the relative center of the circle. The minimum swing tail radius of beam 1 is used to make the bridge erection machine 100 lift and transport the steel box girder curve through the bridge hole, stabilize the center of gravity of the entire bridge erection machine 100, and can effectively avoid the possibility that the bridge erection machine 100 may carry To avoid the overturning risk of the bridge crane, the safe and fast erection of the steel box girder bridge deck with large arc curve can be realized.

Those of ordinary skill in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Changes and modifications will fall within the scope of the claims of the present invention.

Claims

A method for erecting a large radian curved steel box girder bridge deck is characterized in that, comprising the following steps:

1) The bridge erection machine reaches the preparation position before the curved via;

2) Start the front and rear outrigger cylinders of the bridge erecting machine to lift the main beam, so that the middle support roller set of the middle outrigger is separated from the lower part of the main beam;

3) Use the front crane to hoist the middle support roller set and the middle support traverse track to the position where the front end of the beam plate has been erected, and place the middle support traverse track so that the middle support traverse track is parallel to the front pier. Fixed middle outrigger support beam track and wheel box group;

4) Lower the front and rear outrigger cylinders, and drop the main beam on the middle-supporting reverse roller set;

5) Start the front outrigger oil pump, fold the front outrigger, and then move the front crane and the rear crane to the position above the rear outrigger;

6) Activate the hydraulic cylinder of the rear outrigger to lower the height of the rear end of the main beam, so that the main beam is in a tilted state with a high front end and a low rear end;

7) Install a track under the rear support longitudinal moving wheel box of the rear outrigger, use the back-supporting longitudinal moving wheel box group of the middle outrigger as a sliding support, and use the rear support longitudinal moving traveling device of the rear outrigger to drive the main beam. The front end, the front outrigger and the lower beam of the front outrigger are moved forward to the top of the front bridge pier;

8) Install the traverse wheel box on the back side of the rear support longitudinal wheel box, and lay the traverse track, take the reverse support vertical shift wheel box group of the middle support as the fulcrum, and use the rear support transverse movement traveling device of the rear support to drive , and finally adjust the front support beam to be parallel to the middle support beam track and the front pier;

9) Drop the lower beam of the front outrigger on the front pier, and fix the front outrigger;

10) Fix the bridge erection machine as a whole to complete the curve through hole.
The method for erecting a large-curved steel box girder bridge deck according to claim 1, wherein the step 1) the preparation position before the bridge erection machine reaches the curved through hole further comprises placing the front legs of the bridge erection machine on the At the position of the bridge pier at the front end of the girder plate that has been erected, the middle outrigger is placed at the position of the bridge pier in the middle of the girder plate, and the rear leg is placed at the rear end of the girder plate. position above the legs.
The method for erecting a bridge deck of a large-curved curved steel box girder according to claim 1, characterized in that: the step 3) fixing the middle support beam track and the wheel box group further comprises connecting the The spacing is adjusted to the corresponding position under the main beam.
The method for erecting a bridge deck of a large-curved curved steel box girder according to claim 1, wherein in step 6) the inclination of the main girder is less than or equal to 4%.
The method for erecting a bridge deck of a large-curved curved steel box girder according to claim 1 is characterized in that: the step 8) using the rear support traverse traveling device of the rear support to drive further comprises: during the lateral adjustment process, the rear support traverses the walk The driving speed of the device should not exceed 1 m/min.
The method for erecting a bridge deck of a large-curved curved steel box girder according to claim 1, characterized in that: in the process of fixing the front outriggers in step 9), the front, middle and rear outrigger systems should be adjusted first, and the main The beam is adjusted to a horizontal state or an inclined state with a high front end of the main beam.