CN219653490U - Construction structure of pile cap of underpass frame bridge overhead fulcrum pile - Google Patents
Construction structure of pile cap of underpass frame bridge overhead fulcrum pile Download PDFInfo
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- CN219653490U CN219653490U CN202320850794.5U CN202320850794U CN219653490U CN 219653490 U CN219653490 U CN 219653490U CN 202320850794 U CN202320850794 U CN 202320850794U CN 219653490 U CN219653490 U CN 219653490U
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- pile cap
- pile
- frame bridge
- steel bars
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 99
- 239000010959 steel Substances 0.000 claims abstract description 99
- 230000002787 reinforcement Effects 0.000 claims description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 5
- 206010023204 Joint dislocation Diseases 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920001821 foam rubber Polymers 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Abstract
The utility model discloses a pile cap construction structure of a downward penetrating frame bridge overhead fulcrum pile, which comprises a pile cap and a normal pile cap, wherein transverse steel bars of the pile cap at the overlapping part extend towards two ends, the extending end parts are welded with transverse steel bars of a frame bridge top plate, pile cap transverse hollow steel pipes are arranged at two sides of the transverse steel bars in the pile cap at the overlapping part, and the transverse steel bars of the frame bridge top plate sequentially pass through the pile cap transverse hollow steel pipes in a one-to-one correspondence manner; pile cap longitudinal hollow steel pipes are arranged on two sides of longitudinal steel bars in the pile caps of the overlapping parts, and the longitudinal steel bars of the frame bridge top plate sequentially penetrate through the pile cap longitudinal hollow steel pipes in a one-to-one correspondence mode. The utility model improves the pile cap of the overhead fulcrum pile, so that a part of the pile cap structure is permanently remained in the top plate of the frame bridge, and the defect of hole repairing of the top plate caused by large-area hole opening of the top plate of the frame bridge in large-span cast-in-situ overhead construction is effectively solved; and the pile cap of the permanent combined fulcrum pile is fully utilized, so that the engineering cost and the construction period are saved.
Description
Technical Field
The utility model relates to the technical field of pile cap construction. More particularly, the utility model relates to a construction structure of a pile cap of an overhead fulcrum pile of a underpass frame bridge.
Background
When a certain station site throat area is newly built with a lower penetrating frame bridge, a jacking method is not applicable due to limited sites, and a cast-in-situ excavation method is not adopted, in a newly built frame bridge position, the position of a large-span large-scale frame bridge overhead pivot pile can possibly cause a pile cap to penetrate a frame bridge top plate, holes are reserved at the pile cap according to a top plate conventional construction method, after pile bodies and the pile caps in the frame bridge are cut off, the reserved holes are filled in a follow-up mode, so that uneven stress of the top plate structure is caused, the construction cost is high, the construction period is long, and the quality, the cost and the progress are not controlled.
Disclosure of Invention
The utility model aims to provide a construction structure of an overhead fulcrum pile cap of a down-penetrating frame bridge, which is used for improving the pile cap of the overhead fulcrum pile, so that a part of the pile cap structure is permanently remained in a top plate of the frame bridge, and the defect of hole repairing of the top plate caused by large-area hole opening of the top plate of the down-penetrating frame bridge in large-span cast-in-place overhead construction is effectively solved; and the pile cap of the permanent combined fulcrum pile is fully utilized, so that the engineering cost and the construction period are saved.
To achieve these objects and other advantages in accordance with the purpose of the utility model, there is provided a construction structure of a pile cap of an overhead fulcrum of a down-going frame bridge, in which a newly-built frame bridge roof horizontally passes through the pile cap structure and partially coincides with the pile cap structure, including a superposed pile cap and a normal pile cap, transverse reinforcements of the superposed pile cap, which are consistent with the arrangement of transverse reinforcements in the normal pile cap, extend toward both ends, and the extending ends are welded with the transverse reinforcements of the frame bridge roof, and pile cap transverse hollow steel pipes are provided on both sides of the transverse reinforcements thereof in the superposed pile cap so that the pile cap transverse reinforcements and the pile cap transverse hollow steel pipes are uniformly and alternately arranged at intervals, and the transverse reinforcements of the frame bridge roof sequentially pass through the pile cap transverse hollow steel pipes in one-to-one correspondence; pile cap longitudinal hollow steel pipes are arranged on two sides of longitudinal steel bars in the pile cap of the overlapping portion, wherein the longitudinal steel bars are consistent with the longitudinal steel bars in the normal pile cap, so that the pile cap longitudinal steel bars and the pile cap longitudinal hollow steel pipes are uniformly and alternately arranged at intervals, the longitudinal steel bars of the frame bridge top plate sequentially pass through the pile cap longitudinal hollow steel pipes in a one-to-one correspondence mode, and the lengths of the pile cap transverse hollow steel pipes and the pile cap longitudinal hollow steel pipes are respectively equal to the width and the height of the pile cap of the overlapping portion.
Preferably, the transverse steel bars in the pile caps of the overlapping portions are identical to the transverse steel bars of the frame bridge roof, and the longitudinal steel bars in the pile caps of the overlapping portions are identical to the longitudinal steel bars of the frame bridge roof.
Preferably, the pile cap transverse hollow steel pipe and the pile cap longitudinal hollow steel pipe are filled with slurry.
Preferably, the same section welding joint between the transverse reinforcing steel bars of the pile cap and the transverse reinforcing steel bars of the frame bridge top plate is not more than 50%, and the joint dislocation length is not less than 35d.
Preferably, the pile cap structure bottom elevation is lower than the frame bridge roof bottom surface, and pile cap bottom reinforcement protection layer thickness is greater than conventional reinforcement protection layer thickness.
Preferably, the support is arranged at the top of the pile cap, and the construction beam is arranged on the support.
The utility model at least comprises the following beneficial effects:
the utility model improves the pile cap of the overhead fulcrum pile, mainly improves the arrangement of the steel bars of the pile cap at the overlapped part, so that a part of the pile cap structure is permanently remained in the top plate of the frame bridge, thereby effectively solving the defect of hole repairing of the top plate caused by large-area hole opening of the top plate of the frame bridge in the large-span cast-in-situ overhead construction and improving the construction quality; and the pile cap of the permanent combined fulcrum pile is fully utilized, so that the engineering cost and the construction period are saved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
FIG. 1 is a schematic diagram of an overhead elevation structure of the present utility model;
FIG. 2 is an enlarged view of the utility model at A in FIG. 1;
fig. 3 is a plan view of the pile cap rebar arrangement of the present utility model.
Reference numerals illustrate:
1. a pile body; 2. d16, constructing a temporary beam; 3. d24, constructing a temporary beam; 4. a pile cap; 5. a frame bridge roof; 6. a support; 7. transverse reinforcing steel bars of pile caps; 8. a pile cap transverse hollow steel pipe; 9. longitudinal steel bars of pile caps; 10. the pile cap is a longitudinal hollow steel pipe.
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present utility model, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.
As shown in fig. 1 to 3, the utility model provides a construction structure of a pile cap of an overhead fulcrum of a downward-penetrating frame bridge, wherein a newly-built frame bridge top plate 5 horizontally penetrates through a pile cap 4 structure and is partially overlapped with the pile cap 4 structure, the construction structure comprises an overlapped part pile cap and a normal pile cap, transverse reinforcing steel bars 7 of the overlapped part pile cap which are consistent with the transverse reinforcing steel bars in the normal pile cap (namely, the overlapped part pile cap is consistent with the transverse reinforcing steel bars in the normal pile cap in arrangement interval, arrangement mode and the like) extend towards two ends, the extending end parts are welded with the transverse reinforcing steel bars of the frame bridge top plate 5, pile cap transverse hollow steel pipes 8 are arranged on two sides of the transverse reinforcing steel bars of the overlapped part pile cap in the overlapped part pile cap, so that the pile cap transverse reinforcing steel bars 7 and the pile cap transverse hollow steel pipes 8 are uniformly and alternately arranged at intervals, and the transverse reinforcing steel bars of the frame bridge top plate 5 sequentially penetrate through the pile cap transverse hollow steel pipes 8 in a one-to-one correspondence; pile cap longitudinal hollow steel pipes 10 are arranged on two sides of longitudinal steel bars 9 in the pile cap of the overlapping part, which are consistent with the longitudinal steel bars in the normal pile cap (namely, the arrangement interval and the arrangement mode of the longitudinal steel bars in the pile cap of the overlapping part are consistent with those of the longitudinal steel bars in the normal pile cap, and the like), so that the pile cap longitudinal steel bars 9 and the pile cap longitudinal hollow steel pipes 10 are uniformly and alternately arranged at intervals, the longitudinal steel bars of the frame bridge roof 5 sequentially pass through the pile cap longitudinal hollow steel pipes 10 in a one-to-one correspondence manner, and the lengths of the pile cap transverse hollow steel pipes 8 and the pile cap longitudinal hollow steel pipes 10 are respectively equal to the width and the height of the pile cap of the overlapping part.
In another technical scheme, the transverse steel bars 7 in the pile caps of the overlapping portions are the same as the transverse steel bars of the frame bridge top plate 5, and the longitudinal steel bars 9 in the pile caps of the overlapping portions are the same as the longitudinal steel bars of the frame bridge top plate 5.
In another technical scheme, the pile cap transverse hollow steel pipe 8 and the pile cap longitudinal hollow steel pipe 10 are filled with slurry.
In another technical scheme, the same section welding joint between the transverse reinforcing steel bars 7 of the pile cap and the transverse reinforcing steel bars of the frame bridge top plate is not more than 50%, and the joint dislocation length is not less than 35d.
In another technical scheme, the elevation of the bottom of the pile cap 4 structure is lower than the bottom of the frame bridge top plate 5, and the thickness of the reinforcement protection layer at the bottom of the pile cap 4 is larger than that of a conventional reinforcement protection layer.
In another technical scheme, the support 6 is arranged at the top of the pile cap 4, and the construction temporary beam is arranged on the support 6, wherein the construction temporary beam comprises a D16 construction temporary beam 2 and a D24 construction temporary beam 3, and the construction temporary beam is not limited to the two construction temporary beams according to actual construction conditions.
Aiming at a mucky soil layer, when an overhead fulcrum pile cap 4 passes through a subsequently newly built frame bridge roof 5, the utility model improves the pile cap steel bars of the overlapping part, and the concrete implementation scheme of the utility model adopts the following technical scheme: and after the strength of the pile bodies 1 reaches the requirement, the pile bodies 1 are driven into a bearing layer, and the pile caps 4 are subjected to reinforcement binding by adopting foundation pit retaining walls, and the pile bodies are divided into two parts: the first part is a part with the pile caps 4 as permanent structures embedded into the frame bridge roof 5, namely pile caps are overlapped, half of pile cap transverse steel bars 7 in the pile caps 4 are consistent with the types, specifications and models of the transverse steel bars of the frame bridge roof 5, the two ends of the pile cap transverse steel bars are respectively prolonged for a certain distance, the pile caps are convenient to weld with the transverse steel bars of the frame bridge roof 5 subsequently, the other half of the transverse steel bars adopt a mode of embedding pile cap transverse hollow steel pipes 8, the beneficial condition is provided for penetrating the transverse steel bars of the frame bridge roof 5 subsequently, and the length of the pile cap transverse hollow steel pipes 8 is the same as the width of the pile caps; in the same way, half of pile cap longitudinal steel bars 9 in the pile cap 4 are consistent with the types, specifications and types of the longitudinal steel bars of the frame bridge roof 5, the two ends are respectively prolonged for a certain distance to form the longitudinal steel bars of the normal pile cap, the other half of the longitudinal steel bars are in a mode of embedding pile cap longitudinal hollow steel pipes 10, the length of the pile cap longitudinal steel bars is as high as that of the pile cap at the overlapping part, and the length of the pile cap longitudinal steel bars 9 only needs to be consistent with the types, specifications and types of the steel bars of the frame bridge roof 5, so that the pile cap height can be reached; the non-overlapped part of the second part and the frame bridge top plate 5 is arranged according to the reinforcing steel bars of the normal pile caps. After concrete is poured and a certain strength is achieved, the installation support 6 and the D16 are used for constructing the temporary beam 2 and the D24 are used for constructing the temporary beam 3.
Because the pile cap 4 is used as a part of the structure of the frame bridge roof 5 to be permanently reserved in the frame bridge roof 5, the arrangement of the steel bars of the pile cap 4 is constructed according to the arrangement of the steel bars of the frame bridge roof 5, so that when the pile cap 4 and the frame bridge roof 5 are bound, half of the pile cap transverse steel bars 7 and the pile cap longitudinal steel bars 9 extend out of the pile cap at a certain distance of the superposition part and are inserted into surrounding soil to be used as the later-stage frame bridge roof 5 steel bar lap joint; the left half of the reinforcing steel bars adopt a pre-buried pile cap transverse hollow steel pipe 8 and a pile cap longitudinal hollow steel pipe 10, foam rubber is blocked at two ends of the hollow steel pipes, and cement slurry is prevented from entering. When the steel bars of the frame bridge roof 5 are bound, the steel bars of the frame bridge roof 5 are directly welded with the reserved and prolonged lap joint steel bars of the pile cap 4, and the rest half of the steel bars are directly penetrated through the reserved hollow steel pipes, and meanwhile grouting treatment is carried out in the hollow steel pipes. The welding joint with the same section is not more than 50%, and the dislocation length of the joint is not less than 35d. Because the pile cap part structure is used as the frame bridge top plate 5, the construction quality and the precision requirements on the pile cap 4 are higher. The pile head top surface, namely the pile cap 4 bottom elevation, is required to be lower than the frame bridge top plate 5 bottom surface by a few centimeters, generally two and three centimeters, the pile cap 4 bottom reinforcement protection layer thickness is majority centimeters, generally two and three centimeters, the pile body 1 below the top plate inside the subsequent frame bridge is convenient to cut, and the internal reinforcement is prevented from leaking.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (6)
1. The pile cap construction structure of the overhead fulcrum pile of the frame bridge of underpass, newly built frame bridge roof board passes pile cap structure and overlaps with pile cap structure part horizontally, characterized by, including overlapping part pile cap and normal pile cap, the horizontal reinforcement of overlapping part pile cap that is consistent with horizontal reinforcement setting in the normal pile cap extends to both ends, and extend end and horizontal reinforcement welding of the frame bridge roof board, there are horizontal hollow steel pipes of pile cap in its horizontal reinforcement both sides in overlapping part pile cap in order to make horizontal reinforcement of pile cap and horizontal hollow steel pipe of pile cap stagger setting at even interval, the horizontal reinforcement of the frame bridge roof board passes the horizontal hollow steel pipe of pile cap in turn one by one; pile cap longitudinal hollow steel pipes are arranged on two sides of longitudinal steel bars in the pile cap of the overlapping portion, wherein the longitudinal steel bars are consistent with the longitudinal steel bars in the normal pile cap, so that the pile cap longitudinal steel bars and the pile cap longitudinal hollow steel pipes are uniformly and alternately arranged at intervals, the longitudinal steel bars of the frame bridge top plate sequentially pass through the pile cap longitudinal hollow steel pipes in a one-to-one correspondence mode, and the lengths of the pile cap transverse hollow steel pipes and the pile cap longitudinal hollow steel pipes are respectively equal to the width and the height of the pile cap of the overlapping portion.
2. The construction structure of the pile cap of the overhead pivot pile of the underpass frame bridge according to claim 1, wherein the transverse reinforcing steel bars in the pile cap of the overlapping portion are identical to the transverse reinforcing steel bars of the top plate of the frame bridge, and the longitudinal reinforcing steel bars in the pile cap of the overlapping portion are identical to the longitudinal reinforcing steel bars of the top plate of the frame bridge.
3. The construction structure of the pile cap of the underpass frame bridge overhead fulcrum pile according to claim 1, wherein the pile cap transverse hollow steel pipe and the pile cap longitudinal hollow steel pipe are filled with grout.
4. The construction structure of the pile cap of the overhead pivot pile of the underpass frame bridge according to claim 1, wherein the same section welding joint between the transverse reinforcing steel bars of the pile cap of the overlapping part and the transverse reinforcing steel bars of the top plate of the frame bridge is not more than 50%, and the joint dislocation length is not less than 35d.
5. The construction structure of the pile cap of the underpass frame bridge overhead supporting point pile according to claim 1, wherein the elevation of the bottom of the pile cap structure is lower than the bottom of the top plate of the frame bridge, and the thickness of the reinforcement protection layer at the bottom of the pile cap is larger than that of the conventional reinforcement protection layer.
6. The construction structure of the pile cap of the underpass frame bridge overhead fulcrum pile according to claim 1, wherein the support is installed at the top of the pile cap, and the construction beam is installed on the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320850794.5U CN219653490U (en) | 2023-04-17 | 2023-04-17 | Construction structure of pile cap of underpass frame bridge overhead fulcrum pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320850794.5U CN219653490U (en) | 2023-04-17 | 2023-04-17 | Construction structure of pile cap of underpass frame bridge overhead fulcrum pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219653490U true CN219653490U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320850794.5U Active CN219653490U (en) | 2023-04-17 | 2023-04-17 | Construction structure of pile cap of underpass frame bridge overhead fulcrum pile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219653490U (en) |
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2023
- 2023-04-17 CN CN202320850794.5U patent/CN219653490U/en active Active
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