Supporting structure for high-position beam falling of large-tonnage simply-supported arch bridge

Abstract

The utility model discloses a large-tonnage simply-supported arch bridge high-position beam falling supporting structure which is arranged and supported at the two ends of a simply-supported arch bridge and comprises a concrete bearing wall, a jack buttress set and an inverted top buttress set, and the concrete bearing wall is poured between two sets of pier columns on the same side of the simply-supported arch bridge; the jack buttress group comprises a plurality of jack buttress units arranged on the concrete bearing wall, and the upper end of each jack buttress unit is supported on the beam bottom of the simply supported arch bridge; the inverted top buttress set comprises a plurality of inverted top buttress units which are arranged on the concrete bearing wall and the two sets of pier columns respectively, each inverted top buttress unit comprises a plurality of sand cylinder supports, a plurality of concrete filled steel tube cushion blocks, a plurality of steel base plates and a rubber support which are sequentially stacked from bottom to top, and the upper ends of the rubber supports are supported on the beam bottom of the simply supported arch bridge. According to the supporting structure for high-position beam falling of the large-tonnage simply-supported arch bridge, high-position accurate beam falling of the large-tonnage simply-supported arch bridge can be rapidly and effectively achieved, and beam falling deviation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a supporting structure for a high-position drop beam of a large-tonnage simply supported arch bridge. Background Art

[0002] Simply supported arch bridges are usually constructed using the scaffolding construction method. Considering that the clearance requirements of the downstream road must be met when constructing across a highway, the simply supported arch bridge will be higher than the design elevation. When the arch bridge deck and arch ribs have been constructed, the arch bridge, which is higher than the design elevation, needs to be lowered.

[0003] For the beam dropping of large-tonnage simply supported arch bridges, the current beam dropping technology has the following problems: the traditional method of pulling out the pad is complicated, especially for beam dropping at a height of more than 2m, it takes a long time to drop the beam, and there is an elevation error on both sides of the bridge, which makes the supporting structure unevenly stressed; at the same time, strict requirements are placed on the transverse elevation of the bridge during beam dropping, which is difficult to control. Once the transverse elevation difference is too large, it is necessary to repeatedly lift the beam and adjust the beam. If the position deviation between the pier and the arch bridge after beam dropping is too large, it is difficult to handle and may affect subsequent construction. Utility Model Content

[0004] The utility model aims to overcome the shortcomings of the background technology and provide a supporting structure for a high-position drop beam of a large-tonnage simply supported arch bridge.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A support structure for a high-position drop beam of a large-tonnage simply supported arch bridge is provided and supported at both ends of the simply supported arch bridge, and the support structure comprises:

[0007] A concrete load-bearing wall cast between two groups of piers on the same side of the simply supported arch bridge;

[0008] A jack pier group, comprising a plurality of jack pier units arranged on the concrete load-bearing wall, wherein the upper ends of each group of the jack pier units are supported on the bottom of the beam of the simply supported arch bridge; and

[0009] The inverted pier group includes a plurality of inverted pier units respectively arranged on the concrete load-bearing wall and the two groups of pier columns, each group of the inverted pier units includes a plurality of sand tube supports, a plurality of steel tube concrete pads, a plurality of steel pads and rubber supports stacked in sequence from bottom to top, and the upper end of the rubber support is supported on the bottom of the beam of the simply supported arch bridge.

[0010] Furthermore, in the inverted pier unit, flanges are provided at both ends of each group of sand cylinder supports, and each two upper and lower adjacent groups of sand cylinder supports are connected via flanges.

[0011] Furthermore, a plurality of reinforcing rib plates are welded inside each group of the sand tube supports.

[0012] Furthermore, the steel tube concrete pad includes a steel cylinder and concrete poured into the steel cylinder.

[0013] Furthermore, in any two groups of the steel tube concrete pads that are adjacent to each other in the inverted pier unit, the steel tube concrete pads located at the lower side are thicker than the steel tube concrete pads located at the upper side.

[0014] Furthermore, in the inverted pier unit, any two groups of steel cylinders adjacent to each other are connected via flanges.

[0015] Furthermore, the upper end of the inverted pier unit located on the pier column is supported on the bottom support of the beam of the simply supported arch bridge.

[0016] Furthermore, the jack pier unit includes a plurality of sand tube supports and a plurality of steel tube concrete pads stacked in sequence from bottom to top, a group of jacks are supported on the steel tube concrete pads located on the top layer, and a rubber support is provided at the upper end of the jack to support the bottom of the beam of the simply supported arch bridge.

[0017] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0018] In the supporting structure of the high-position beam drop of a large-tonnage simply supported arch bridge of the utility model, a concrete load-bearing wall is cast between two piers to place a jack pier group and an inverted pier group. Both the jack pier group and the inverted pier group are composed of a plurality of unit bodies, which is beneficial to dispersing the load of the beam body on the supporting structure; at the same time, the inverted pier unit is composed of a plurality of sand tube supports, a plurality of steel tube concrete pads, a plurality of steel pads and rubber supports stacked together. During the beam drop process, the simply supported arch bridge is alternately supported by the jack pier group and the inverted pier group. During the process, the sand tube supports, steel tube concrete pads and steel pad structures in the inverted pier unit are removed one by one, so that the high-position precise beam drop of the large-tonnage simply supported arch bridge can be achieved quickly and effectively, and the beam drop deviation can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a longitudinal section view of the beam support of the large-tonnage simply supported arch bridge of the utility model;

[0020] Figure 2 A plan view of the support structure of the utility model;

[0021] Figure 3 It is a cross-sectional view of the jack pier group of the utility model;

[0022] Figure 4 It is a cross-sectional view of the inverted buttress group of the utility model;

[0023] Figure 5 It is a structural schematic diagram of a jack pier unit in one embodiment of the utility model;

[0024] Figure 6 It is a structural schematic diagram of an inverted buttress unit in one embodiment of the utility model;

[0025] Icons: 1-simply supported arch bridge, 10-beam bottom support, 2-supporting structure, 20-pier, 21-concrete load-bearing wall, 3-inverted pier group, 30-inverted pier unit, 4-jack pier group, 40-jack pier unit, 50-sand tube support, 51-concrete-filled steel tube pad, 52-steel pad, 53-rubber support, 60-jack. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Reference Figures 1 to 6 The utility model discloses a supporting structure 2 for a high-position drop beam of a large-tonnage simply supported arch bridge 1, wherein the supporting structure 2 is arranged at both ends of the simply supported arch bridge 1.

[0028] Each group of supporting structures 2 includes a concrete load-bearing wall 21, an inverted pier group 3 and a jack pier group 4, wherein no cap beam is arranged between the tops of the two groups of piers 20 on the same side of the supporting structure 2. Therefore, the concrete load-bearing wall 21 is cast between the two groups of piers 20, and the piers 20 are slightly higher than the height of the concrete load-bearing wall 21.

[0029] Reference Figure 2 The jack pier group 4 includes a plurality of jack pier units 40 arranged on the concrete load-bearing wall 21. In the present embodiment, the jack pier group 4 includes eight groups of jack pier units 40, with four groups arranged on each side of each pier column 20. The upper ends of each group of jack pier units 40 are supported on the bottom of the beam of the simply supported arch bridge 1.

[0030] Reference Figure 2 The inverted pier group 3 includes a plurality of inverted pier units 30 respectively arranged on the concrete load-bearing wall 21 and the two groups of pier columns 20. In this embodiment, the inverted pier group 3 includes eight groups of inverted pier units 30, and among the eight groups of inverted pier units 30, one group is arranged on each group of pier columns 20 and three groups are arranged on the concrete load-bearing wall 21 on one side of each group of pier columns 20. The upper ends of the eight groups of inverted pier 30 units are also supported on the bottom of the beam of the simply supported arch bridge 1.

[0031] Reference Figure 6 In one embodiment, each group of inverted pier units 30 includes a plurality of sand tube supports 50, a plurality of steel tube concrete pads 51, a plurality of steel pads 52 and rubber supports 53 stacked in sequence from bottom to top, wherein the lowest sand tube support 50 is installed on the concrete load-bearing wall 21, and the upper end of the rubber support 53 is supported on the bottom of the beam of the simply supported arch bridge 1.

[0032] Among them, flanges are provided at both ends of each group of sand barrel supports 50, and each upper and lower adjacent groups of sand barrel supports 50 are connected by flanges, and a number of reinforcing ribs are welded inside each group of sand barrel supports 50. During the load-bearing support process, the sand barrel supports 50 will not be deformed, thereby increasing the bearing capacity of the sand barrel supports 50.

[0033] In addition, the steel tube concrete pad 51 includes a steel cylinder and concrete poured in the steel cylinder, and in the inverted pier unit 30, any two groups of steel cylinders adjacent to each other are connected by flanges.

[0034] Reference Figure 6 In one embodiment, in any two adjacent groups of steel tube concrete pads 51 in each group of inverted pier units 30, the thickness of the steel tube concrete pad 51 located on the lower side is thicker than the thickness of the steel tube concrete pad 51 located on the upper side, wherein the thicknesses of the four groups of steel tube concrete pads 51 from bottom to top are 50 cm, 40 cm, 30 cm and 20 cm respectively.

[0035] Reference Figure 4 The upper ends of the two groups of inverted pier units 30 located on the pier column 20 are supported on the bottom support 10 of the simply supported arch bridge, and the tops of the remaining inverted pier units 30 are supported on the steel plates at the bottom of the beam.

[0036] Reference Figure 5 In one embodiment, the jack pier unit 40 includes a plurality of sand tube supports 50 and a plurality of steel tube concrete pads 51 stacked in sequence from bottom to top, a group of jacks 60 are supported on the steel tube concrete pads 51 located on the top layer, and a group of rubber supports 53 are provided at the upper ends of the jacks 60, and the upper ends of the rubber supports 53 are supported on the bottom of the beam of the simply supported arch bridge 1.

[0037] In the above embodiment, steel plates are provided on the bottom of the beam of the simply supported arch bridge 1 at the contacting parts with each group of jack pier units 40 and each group of inverted pier units 30 .

[0038] The working steps of the supporting structure of the high-position drop beam of the large-tonnage simply supported arch bridge of the utility model are as follows:

[0039] S1, jacking up: the jacks 60 in the eight jack pier units 40 in the supporting structure 2 on the first side of the simply supported arch bridge 1 are jacked up synchronously, and the inverted pier unit 30 and the steel pad 51 on the top thereof are observed at the same time. When the bottom of the beam is separated from the steel pad 51 in the inverted pier unit 30, the jacking up is stopped and the jacks 60 are locked;

[0040] S2, beam drop: the topmost steel pad 52 (thickness 20 mm) of each set of inverted pier units 30 is taken out, and then the hydraulic system of eight jacks 60 starts to drop the beam synchronously, and drops the beam body onto the inverted pier unit 30 with the top steel pad 52 removed;

[0041] S3, lifting: the eight jacks 60 in the supporting structure 2 on the second side of the simply supported arch bridge 1 are lifted synchronously, and the inverted pier unit 30 and the steel pad 51 on the top thereof are observed at the same time. When the bottom of the beam is separated from the steel pad 51 in the inverted pier unit 30, the lifting is stopped and the jacks 60 are locked;

[0042] S4, beam drop: the topmost steel pad 52 (thickness 20 mm) of each set of inverted pier units 30 is taken out, and then the hydraulic system of eight jacks 60 starts to drop the beam synchronously, dropping the beam body onto the inverted pier unit 30 with the top steel pad 52 removed;

[0043] S5, remove the steel tube concrete pad 51. When the steel pad 51 at the top of each group of inverted pier units 30 is about to be removed, remove a 30 cm section of the steel tube concrete pad 51, and continue to drop the beam after supporting it with the steel pad 51 and the rubber bearing 53;

[0044] S6, repeating steps S1 to S5, until the height difference between the bottom of the beam of the simply supported arch bridge 1 and the top of the cushion stone on the pier 20 is 60cm, roughening the surface of the cushion stone, removing debris from the surface of the cushion stone and the reserved bolt holes, and installing the support on the embedded steel plate of the bottom plate of the beam body with bolts, the upper support plate is closely attached to the embedded steel plate, the relative height difference of the four corners of the support bottom plate is not more than 2mm, the lateral deviation of the support center is not more than 10mm, and the longitudinal deviation is not more than 20mm;

[0045] S7. Monitoring: Measure the bridge elevation, axis and other data. Each measuring point should be carefully monitored to reflect the measurement data and analyze whether the error between the bridge and the designed position is within the allowable range of the specifications and design documents;

[0046] Horizontal and vertical deviation correction: If the bridge has a large horizontal and vertical deviation during the beam lowering process, a universal jack can be installed on the pad stone to correct the beam.

[0047] Verification: Submit the correction data to the on-site leadership team to compare the differences between the measured data and the theoretical data;

[0048] S8. Repeat steps S1 to S5 until the beam is placed at the designed position and grouting is performed at the bottom of the support.

[0049] S9. Use a chain hoist and a truck crane to lift the dismantled equipment in the supporting structure 2 from both ends away from the pier top.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A support structure for a high-position drop beam of a large-tonnage simply supported arch bridge, arranged and supported at both ends of the simply supported arch bridge, characterized in that: The support structure comprises: A concrete load-bearing wall cast between two groups of piers on the same side of the simply supported arch bridge; A jack pier group, comprising a plurality of jack pier units arranged on the concrete load-bearing wall, wherein the upper ends of each group of the jack pier units are supported on the bottom of the beam of the simply supported arch bridge; and The inverted pier group includes a plurality of inverted pier units respectively arranged on the concrete load-bearing wall and the two groups of pier columns, each group of the inverted pier units includes a plurality of sand tube supports, a plurality of steel tube concrete pads, a plurality of steel pads and rubber supports stacked in sequence from bottom to top, and the upper end of the rubber support is supported on the bottom of the beam of the simply supported arch bridge.

2. The supporting structure of the high-position drop beam of a large-tonnage simply supported arch bridge according to claim 1 is characterized in that: In the inverted pier unit, flanges are provided at both ends of each group of sand cylinder supports, and two upper and lower adjacent groups of sand cylinder supports are connected via flanges.

3. The supporting structure of the high-position drop beam of a large-tonnage simply supported arch bridge according to claim 1 or 2, characterized in that: A plurality of reinforcing rib plates are welded inside each group of the sand tube supports.

4. The supporting structure of the high-position drop beam of a large-tonnage simply supported arch bridge according to claim 1 is characterized in that: The steel tube concrete pad includes a steel cylinder and concrete poured into the steel cylinder.

5. The supporting structure of high-position drop beam of large-tonnage simply supported arch bridge according to claim 1 or 4, characterized in that: In any two groups of the steel tube concrete pads that are adjacent to each other in the inverted pier unit, the steel tube concrete pads located at the lower side are thicker than the steel tube concrete pads located at the upper side.

6. The supporting structure of the high-position drop beam of a large-tonnage simply supported arch bridge according to claim 4 is characterized in that: In the inverted pier unit, any two groups of steel cylinders adjacent to each other are connected via flanges.

7. The supporting structure of a high-position drop beam of a large-tonnage simply supported arch bridge according to claim 1 is characterized in that: The upper end of the inverted pier unit located on the pier column is supported on the bottom support of the beam of the simply supported arch bridge.

8. The supporting structure of the high-position drop beam of a large-tonnage simply supported arch bridge according to claim 1 is characterized in that: The jack pier unit includes a plurality of sand tube supports and a plurality of steel tube concrete pads stacked in sequence from bottom to top, a group of jacks are supported on the steel tube concrete pads located on the top layer, and a rubber support is provided at the upper end of the jack to support the bottom of the beam of the simply supported arch bridge.

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