CN219671101U - Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius - Google Patents
Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius Download PDFInfo
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- CN219671101U CN219671101U CN202321086878.2U CN202321086878U CN219671101U CN 219671101 U CN219671101 U CN 219671101U CN 202321086878 U CN202321086878 U CN 202321086878U CN 219671101 U CN219671101 U CN 219671101U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000010276 construction Methods 0.000 claims abstract description 24
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241001669679 Eleotris Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model relates to the technical field of bridge erection, and discloses a steering structure of a narrow-section small-curve-radius ramp bridge auxiliary bridge girder erection machine. The utility model solves the technical problem that the bridge girder erection machine cannot safely pass through a bridge with a small curve radius with a narrow section, effectively connects the temporary auxiliary pier with the bent cap by adopting the steel plate, ensures the stable support pad of the front cross beam of the bridge girder erection machine, effectively improves the safety, and has convenient and quick forward support leg, wide operation space, strong reusability and high construction speed.
Description
Technical Field
The utility model relates to the technical field of bridge erection, in particular to a steering structure of a narrow-section small-curve-radius ramp bridge auxiliary bridge girder erection machine.
Background
The highway interchange ramp bridge generally has the characteristics of narrow section and small radius curve, when a curve section large-span precast beam is required to be erected, the front cross beam exceeds the range of the bent cap due to the large width of the supporting leg of the bridge girder erection machine, and the bridge girder erection machine has extremely high overturning risk when turning, and the traditional construction method is usually double crane girder erection or precast beam replacement construction, complicated construction procedure, large equipment investment cost and long construction period.
Disclosure of Invention
The utility model aims to provide a steering structure of a bridge girder erection assisting machine for a ramp bridge with a small curve radius and a narrow section, which is suitable for erection of various prefabricated box girders with a large span, a small curve radius or T-girder bridge erection machines, and solves the technical problem that the bridge girder erection machine cannot pass through.
The technical scheme includes that the steering structure of the bridge girder erection assisting machine for the ramp bridge with the small curve radius of the narrow section comprises pier columns, cap beams arranged at the upper ends of the pier columns and auxiliary piers arranged on the outer sides of the pier columns, wherein the auxiliary piers are columns of steel structures and are arranged on the ground foundation, corbels are arranged on the periphery of the bottoms of the auxiliary piers to support the ground, cable ropes are arranged on the auxiliary piers to be anchored and connected with the ground, and steel plates are paved at the tops of the auxiliary piers to be connected with the cap beams.
Further, the auxiliary pier adopts pier column shaping steel templates.
Further, four groups of brackets and cable ropes are arranged on the front, the back, the left and the right.
Further, the ground foundation is a concrete cushion layer arranged on the foundation.
Further, the top end of the auxiliary pier or the top end of the capping beam is provided with I-steel adjusting height, so that the level of the steel plate is adjusted.
The beneficial effects of the utility model are as follows:
the utility model solves the technical problem that the bridge girder erection machine cannot safely pass through a bridge with a small curve radius with a narrow section, effectively connects the temporary auxiliary pier with the bent cap by adopting the steel plate, ensures the stable support pad of the front cross beam of the bridge girder erection machine, effectively improves the safety, and has convenient and quick forward support leg, wide operation space, strong reusability and high construction speed.
The auxiliary pier is convenient to assemble and disassemble, can be reused, and reduces investment waste. The original pier column shaping steel template is utilized to assemble the pier to form an auxiliary pier, the material investment is not required to be increased, and meanwhile, the height of the auxiliary pier can be adjusted according to the height of the pier column to be erected, so that the construction cost can be effectively saved. By adopting the structure, the safety and stability of box girder erection can be effectively improved, and the safety risk in the construction process can be effectively reduced.
Compared with the double-crane girder or the construction of changing the precast beam into the cast-in-situ beam, the construction channel, bridge and foundation treatment time are reduced, and the girder erecting period is shortened. The construction quantity of foundation replacement and filling of crane operation sites and construction of channels and bridges is reduced, the labor and equipment cost is reduced, and the construction cost is saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic representation of the use of the present utility model.
In the figure: 1. pier column; 2. a capping beam; 3. a box girder; 41. an auxiliary pier; 42. a bracket; 43. a steel plate; 51. a rear leg; 52. middle supporting legs; 53. a rear traversing rail; 54. a front traversing rail.
Detailed Description
In order to better understand the purpose, structure and function of the utility model, the steering structure of the auxiliary bridge girder erection machine for the ramp bridge with the small curve radius and the narrow section of the utility model is further described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the steering structure of the auxiliary bridge girder erection machine for the ramp bridge with the small curve radius with the narrow section comprises pier columns 1, a bent cap 2 arranged at the upper ends of the pier columns 1 and auxiliary piers 41 arranged at the outer sides of the pier columns 1, wherein the auxiliary piers 41 are columns of steel structures, are arranged on the ground, corbels 42 are arranged at the periphery of the bottoms of the auxiliary piers 41 to support the ground, cable ropes (not shown in the figure) are arranged on the auxiliary piers 41 to be anchored and connected with the ground, and steel plates 43 are paved at the tops of the auxiliary piers 41 to be connected with the bent cap 2.
In this embodiment, the auxiliary pier 41 uses the original pier column shaping steel form. Firstly, foundation treatment is carried out on the outer edge 3m multiplied by 3m range of the foundation of the auxiliary pier 41 in advance, construction can be carried out according to a foundation treatment method of roadbed construction, and the foundation bearing capacity of the auxiliary pier 41 is required to be tested and detected after the foundation treatment is finished, because the auxiliary pier 41 only bears vertical load, and when a bridge girder erection machine passes through holes, the main hook lifting capacity of the bridge girder erection machine WJQ180-45 is 90t+90t, the main hook lifting capacity of the bridge girder erection machine is used for the lifting operation of a precast beam, the maximum supporting counter force of a transverse moving track 54 before a bridge girder erection machine calculation book is 109t, the vertical load borne by the auxiliary pier 41 is 109t, and the auxiliary pier 41 (taking an original pier column as an example) is additionally usedThe total material and other loads amounted to about 28t, represented by p=137000 kg/9m 2 =15222kg/m 2 =15222N/m 2 And about 15kpa, the bearing capacity of the auxiliary pier foundation is only greater than 15kpa, so that the capacity of bearing the load of the bridge girder erection machine can be achieved.
Then, the foundation bed layer construction of the auxiliary pier 41 is carried out, the foundation of the auxiliary pier 41 is 3m multiplied by 0.2m, C25 concrete is adopted for pouring, and a shaping steel template is used for welding treatment.
Then, the pier column shaping steel template is assembled, and the pier column shaping steel template is selected according to the dimension consistent with the pier column dimension at the lower part of the capping beam 2, and is not smaller than the original pier column 1. All templates must meet the requirements of rigidity, strength and stability, and all bolt holes are fastened in place by bolts during assembly, so that the loosening phenomenon cannot occur. After the installation of the auxiliary pier 41 is completed, the bolts are checked for loosening. The cut bracket 42 is fully welded on the lower edge of the auxiliary pier 41, and is symmetrically arranged in the front-back and left-right directions.
And then, reinforcing the auxiliary pier 41, hoisting the auxiliary pier 41 into place by adopting an automobile crane and reinforcing the auxiliary pier 41 by using cable ropes after the auxiliary pier 41 is assembled, wherein four cable ropes are required to be arranged front, back, left and right and are used for anchoring and tensioning by using a ground anchor and a manual hoist in order to avoid the influence of wind force on the stability of the auxiliary pier 41.
Finally, the steel plate 43 at the top of the auxiliary pier 41 is installed, the steel plate 43 at the top of the auxiliary pier 41 is hung to the top of the auxiliary pier 41 by a crane, the steel plate 43 and the auxiliary pier 41 are welded into a whole by an electric welding machine, if the steel plate 43 and the bent cap 2 are not at the same elevation, two I-beams are needed to adjust the height between the steel plate 43 and the shaping steel template, for example, when the height difference between the bent cap 2 and the pier stud is within 10cm, the corresponding height square lumber, I-beams or bamboo plywood can be used for leveling, so that the levelness of the top steel plate 43 meets the supporting requirement of the auxiliary pier 41, and the height consistency of the earwall of the bent cap 2 and the steel plate 43 at the top of the auxiliary pier 41 is ensured.
As shown in fig. 2, the bridge girder erection machine via hole operation procedure: measuring and positioning, paving an extension rail, jacking a middle supporting leg 52, leaving the middle supporting leg 52 from the rail, removing a middle supporting leg transverse rail, jacking a rear supporting leg 51, removing a transverse rail, turning the rear supporting leg 51 to fall on a longitudinal rail, lifting a crown block to the rear end to be used as a counterweight (simultaneously, temporary reinforcement), retracting the front supporting leg, carrying out safety inspection before shifting, longitudinally moving the whole machine in place, dropping the front supporting leg (transverse rail), jacking the middle supporting leg 52 (transverse rail), dropping the middle supporting leg 52 on the transverse rail, lifting the rear supporting leg 51 (transverse rail), lifting the rear supporting leg 51 to fall on the transverse rail, and carrying out full-face test operation safety inspection. When the bridge girder erection machine passes through the hole, the girder transporting vehicle and the bridge girder erection machine longitudinally run the section of track to be paved, and the included angle between the section of track and the opposite bridge pier is required to be consistent with the telescopic included angle of the bridge girder.
After the front support leg and the front transverse rail 54 of the bridge girder erection machine complete the via hole, the front transverse rail 54 is erected on the steel plate 43 at the top of the auxiliary pier 41 and the ear wall at the far end of the bent cap 2, and the sleeper is used for supporting in a well-shaped mode, at the moment, the front support leg of the bridge girder erection machine can transversely move towards the bent cap 2, and the rear support leg 51 moves towards the opposite direction, so that the bridge girder erection machine is turned, and the front transverse rail 54 and the rear transverse rail 53 are turned after the limit position is reached.
According to the utility model, the front cross beam of the bridge girder erection machine is used as a front landing leg platform of the bridge girder erection machine, the cross beam is stably placed on the cover beam 2 of the front pier column and the auxiliary pier 41, the cover beam 2 and the auxiliary pier 41 are connected together by adopting the steel plate 43 and used as a front landing leg placing platform of the bridge girder erection machine, so that the bridge girder erection machine is ensured not to topple due to unstable gravity center, after the bridge girder erection machine turns, the auxiliary pier 41 has completed the temporary supporting function, the bridge girder erection machine can move the cross beam onto the cover beam 2, and the normal box girder 3 erection operation can be performed at the moment. After the whole span precast beam is erected and the bridge girder erection machine passes through the holes to the next span, the auxiliary piers 41 can be removed by crane cooperation.
The steering structure of the auxiliary bridge girder erection machine is used for the narrow-section small-curve-radius ramp bridge, solves the technical problem that the bridge girder erection machine cannot safely pass through the narrow-section small-curve-radius bridge, performs precast girder erection operation by using an auxiliary pier 41 process, reduces the rigid requirement on the site, greatly reduces the concrete and mechanical investment required by the hardened site compared with a double-crane girder erection method, is convenient and quick to install and detach, and can be repeatedly used for multiple times. The construction speed is high, the cost is low, a large amount of resources can be saved, and the environment-friendly and energy-saving benefits are good.
The bridge girder erection machine is adopted to erect the auxiliary pier 41 for construction of the Taifeng expressway Feng county intercommunication overpass D ramp bridge, a more convenient mode is provided for the operation of a narrow-section small-radius curve bridge girder, so that the construction operation difficulty is greatly reduced, meanwhile, the influence of construction channels, temporary bridges and flat sites on construction and environment is reduced, the height evaluation of construction units, design units and supervision units is obtained, and valuable references and references are provided for similar engineering construction, and the social benefit is particularly obvious.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. The utility model provides a structure that small curve radius ramp bridge of narrow section assisted bridge girder erection machine turned to, a serial communication port, including pier stud (1), capping beam (2) that pier stud (1) upper end set up and auxiliary pier (41) that set up in pier stud (1) outside, auxiliary pier (41) are steel construction's cylinder, set up on ground basis, the bottom periphery of auxiliary pier (41) sets up bracket (42) supporting ground, sets up cable rope anchor connection ground on auxiliary pier (41), steel sheet (43) are laid on auxiliary pier (41) top and are connected capping beam (2).
2. The steering structure of the narrow-section small-curve-radius ramp bridge auxiliary bridge girder erection machine according to claim 1, wherein the auxiliary piers (41) are pier column shaping steel templates.
3. The steering structure of the auxiliary bridge girder erection machine for the ramp bridge with the small radius of the narrow section according to claim 1, wherein four groups of brackets (42) and guy ropes are arranged in the front, the back, the left and the right.
4. The steering structure of the narrow-section small-curve-radius ramp bridge auxiliary bridge girder erection machine according to claim 1, wherein the ground foundation is a concrete cushion layer arranged on a foundation.
5. The steering structure of the narrow-section small-curve-radius ramp bridge auxiliary bridge girder erection machine according to claim 1, wherein an i-beam adjusting height is arranged at the top end of the auxiliary pier (41) or the top end of the bent cap (2), so that the level of the steel plate (43) is adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086878.2U CN219671101U (en) | 2023-05-09 | 2023-05-09 | Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321086878.2U CN219671101U (en) | 2023-05-09 | 2023-05-09 | Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219671101U true CN219671101U (en) | 2023-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321086878.2U Active CN219671101U (en) | 2023-05-09 | 2023-05-09 | Steering structure of bridge girder erection machine assisted by ramp bridge with narrow section and small curve radius |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219671101U (en) |
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2023
- 2023-05-09 CN CN202321086878.2U patent/CN219671101U/en active Active
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