Abutment back structure of high fill roadbed bridgehead
By using a combination of prestressed high-strength concrete thin-walled pipe piles with pile caps and crushed stone cushion layers in the bridge abutment structure, the problem of vehicle slab settlement at the bridge abutment was solved, improving the stability of the bridge and driving comfort, while reducing construction costs and time.
Patent Information
- Application Number
- CN202423198539.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Bridge approach slab ...
The prestressed high-strength concrete thin-walled pipe piles and pile cap structures are combined with crushed stone cushion layer, cement soil layer and asphalt surface layer to form an integral connection. The high-strength concrete thin-walled pipe piles control vertical deformation, uniform settlement and improve subgrade stability. Settlement plates and approach plates are set to adapt to uneven settlement.
It effectively prevents bridge approach slab settlement, improves the overall stability and compressive strength of the roadbed, reduces structural damage, enhances driving comfort, and lowers project costs and construction time.
Smart Images
Figure CN223607729U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to bridge engineering technical field, especially a high fill roadbed bridge head's abutment structure and steel box girder and processing method. BACKGROUND
[0002] With the rapid development of infrastructure projects in China, the highway projects operated throughout the country all generally appear a certain degree of bridge head bumping phenomenon, the highway project construction cycle is short, especially the high fill roadbed and the abutment joint, the road surface and the bridge pavement at the abutment backfill of bridge often appear different degrees of settlement, and the settlement leads to the bridge head to appear the wrong abutment to cause a certain degree of bumping and jumping phenomenon in the driving process of vehicle, is called bridge head bumping phenomenon; Bridge head bumping not only has the adverse effect on the structure of bridge, leads to the service life to be shortened, but also makes the personnel in the vehicle to have the violent bumping feeling, influences the vehicle driving, increases the driving risk, thereby leads to the vehicle damage and a series of traffic problems; Therefore, solving the problem of bridge head bumping becomes the important task of highway engineering. SUMMARY
[0003] In order to solve the above problems, the utility model provides a kind of abutment structure of high fill roadbed bridge head, prevent the occurrence of bridge head bumping phenomenon, guarantee driving safety, improve the comfort of driving.
[0004] In order to realize the above technical features, the utility model is realized as follows: a kind of abutment structure of high fill roadbed bridge head, the abutment structure is used to connect bridge abutment and roadbed part, pile foundation is provided on the top of the pile foundation, the top of the pile cap is vertically poured with bridge abutment, the upper portion of the bridge abutment is provided with pile cap on one side, the other side is erected beam plate, and bridge deck is paved on the bridge abutment, the top of the bridge deck is paved with asphalt surface.
[0005] The pile foundation adopts prestressed high-strength concrete thin-walled pipe pile, the prestressed high-strength concrete thin-walled pipe pile adopts factory-produced hollow cylindrical section concrete prefabricated component, including cylindrical pile body, prestressed reinforcement and stirrup, end plate and steel sleeve hoop; the prestressed high-strength concrete thin-walled pipe pile is statically pressed by hydraulic crawler pile driver on the site foundation, and carbon dioxide gas shielded welding is used.
[0006] The inside of the prestressed high-strength concrete thin-walled pipe pile is provided with a support plate at a certain height from the top of the pile, and the inside of the prestressed high-strength concrete thin-walled pipe pile is filled with core concrete on the top of the support plate; the pile cap and the top of the prestressed high-strength concrete thin-walled pipe pile are connected by steel bars, and are arranged in a square shape.
[0007] The inside of the prestressed high-strength concrete thin-walled pipe pile is provided with a support plate at a certain height from the top of the pile, and the inside of the prestressed high-strength concrete thin-walled pipe pile is filled with core concrete on the top of the support plate; the pile cap and the top of the prestressed high-strength concrete thin-walled pipe pile are connected by steel bars, and are arranged in a square shape.
[0008] The top of the pile cap is paved with a certain thickness of gravel cushion; the gravel cushion is paved with a cement soil layer; the cement soil layer is paved with a cladding plate; and the top of the cladding plate is paved with an asphalt surface.
[0009] The settlement plate is further provided with a measuring rod welded and fixed on the top of the settlement plate, and a sleeve pipe is sleeved on the outside of the measuring rod; the settlement plate is buried before filling soil after the soft foundation treatment is completed; the settlement plate should be flat during the burying process, and a sand cushion layer is paved under the settlement plate; the top of the sleeve pipe should be covered to seal the pipe opening; and the height of the cover is at least 50cm higher than the height of the rolling surface.
[0010] The settlement plate is made of a steel plate, the measuring rod is made of a steel pipe, and the sleeve pipe is made of a plastic pipe.
[0011] The cement soil layer is filled in layers;
[0012] The cladding plate is made of steel bars and concrete; the steel bars are arranged on the back of the abutment in a longitudinal and transverse manner according to a spacing, and one end of the steel bars penetrates into the back wall of the abutment; an oil felt is laid on the corbel or the back of the abutment; the anchor bars on the cladding plate are smeared with asphalt and are provided with steel pipes; the cladding plate and the back wall are filled with oil-impregnated fiber plates and asphalt mastic filling materials; a water-stable gravel layer is filled between the cladding plate and the cushion layer; finally, the asphalt concrete is paved; and the longitudinal tie rods are used to connect the cladding plate and the transition section of the concrete.
[0013] The utility model has the advantages of the following:
[0014] 1. The abutment back structure of the high fill embankment bridge head has the advantages that the high-strength concrete thin-walled pipe pile can not only control the vertical deformation of the high fill embankment, but also improve the overall horizontal resistance of the embankment, thereby ensuring the stability and deformation continuity of the overall embankment from the bridge head section to the transition section, improving the bearing capacity of the embankment of the abutment back, and accelerating the construction progress.
[0015] 2. The utility model sets the pile cap on the high-strength concrete thin-walled pipe pile, connects the pipe piles to form a whole, improves the resistance to uneven deformation, realizes the uniform transition of settlement, simultaneously paves the cushion layer, and forms a whole with the pipe pile and the high fill embankment, so that the deformation of the soft soil under the pipe pile can be avoided, thereby avoiding the excessive additional concentrated force on the rigid structure above the pipe pile, and the uneven settlement and deformation of the embankment can be adapted.
[0016] 3. The utility model sets the cushion layer under the cladding plate, so that the embankment can bear smaller live load, and the hollow area does not appear under the cladding plate near the abutment end.
[0017] 4. The utility model lays an oil felt on the corbel or the back of the abutment, and then places the cladding plate near the abutment end on the oil felt, so that the small rotation of the cladding plate can be adapted, and the waterproof effect can be achieved.
[0018] 5. The structure of this utility model is simple. It can not only effectively alleviate uneven settlement and reduce the occurrence of damage to the soil, roadbed, abutment, and bridge abutment, but also increase the overall strength, stability and compressive strength of the abutment, reduce the occurrence of bridge approach slab settlement, and improve driving comfort. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a cross-sectional view of a precast pipe pile for utility model.
[0021] Figure 2 This is a diagram showing the connection between the pipe pile and the pile cap of a utility model.
[0022] Figure 3 This is a detailed drawing of the settlement plate of the utility model.
[0023] Figure 4 This is an elevation view of a ribbed bridge abutment of a utility model.
[0024] Figure 5 This is a sample drawing of the connection between the approach plate and the bridge abutment for the utility model.
[0025] In the figure: 1. Prestressed high-strength concrete thin-walled pipe pile; 2. Pile cap; 3. Crushed stone cushion layer; 4. Support plate; 5. Core filling concrete; 6. Measuring rod; 7. Sleeve; 8. Water-stabilized crushed stone layer; 9. Longitudinal tie rod; 10. Asphalt felt; 11. Steel pipe; 12. Oil-impregnated fiberboard; 13. Asphalt mastic filler; 14. Settlement plate; 15. Corbel; 16. Detailed Implementation
[0026] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0027] Example 1:
[0028] See Figures 1-5 A back abutment structure for a bridge abutment in a high embankment roadbed is disclosed. This back abutment structure connects the abutment and the roadbed. A pile cap is installed on top of the pile foundation, and the abutment is vertically cast on top of the pile cap. A pile cap 2 is installed on one side of the upper part of the abutment, and a beam slab is erected on the other side. A bridge deck is then laid on top of the abutment, and an asphalt surface layer is laid on top of the bridge deck. After the pile foundation of the aforementioned back abutment structure is completed, the pile cap is constructed, and the abutment is vertically cast on the pile cap. A cap is installed on one side of the upper part of the abutment, and a beam slab is erected on the other side. The bridge deck is then laid on top of the abutment, and an asphalt pavement is constructed. The structure between the abutment and the roadbed, from bottom to top, includes a prestressed high-strength concrete thin-walled pipe pile foundation, a pile cap, a crushed stone cushion layer, a cement-soil layer, an approach slab, and an asphalt surface layer. This structure effectively prevents uneven settlement from causing bridge approach slab settlement.
[0029] Further, the pile foundation adopts prestressed high-strength concrete thin-walled pipe pile 1, which adopts factory-produced hollow cylindrical concrete prefabricated components with equal cross-section, including cylindrical pile body, prestressed reinforcement and stirrup, end plate and steel collar; the prestressed high-strength concrete thin-walled pipe pile 1 is statically pressed on site by a hydraulic crawler-type pile driver, and carbon dioxide gas shielded welding is adopted.
[0030] Preferably, the prestressed high-strength concrete thin-walled pipe pile 1 is statically pressed by a hydraulic crawler-type pile driver, and uses the prestressed centrifugal forming process of the pretensioning method, and is cured by steam at 10 atmospheres and about 180℃. The statically pressed hydraulic crawler-type pile driver is used on site, and the reinforcement ratio and concrete strength grade of the pipe pile can be reduced by one grade according to test data, which reduces the construction cost. Meanwhile, the carbon dioxide gas shielded welding technology is adopted, the welding quality is better, the amount of cutting is less, and the construction speed is fast.
[0031] Further, the prestressed high-strength concrete thin-walled pipe pile 1 is provided with a support plate 4 inside and at a certain height from the top of the pile, and the prestressed high-strength concrete thin-walled pipe pile 1 is filled with core concrete 5 at the top of the support plate 4; the pile cap 2 is connected to the top of the prestressed high-strength concrete thin-walled pipe pile 1 by steel bars, and is arranged in a square shape.
[0032] Preferably, a 5mm thick steel plate is installed as a support plate below 45cm of the top of the pipe pile, the pile cap is connected to the pipe pile by steel bars, and is arranged in a square shape, and is cast on site. Before pouring the core concrete, the inner pipe float should be cleaned first, and then the inner wall should be brushed with cement slurry to improve the integrity of the core concrete and the pipe pile body concrete; the core concrete can be poured together with the pile cap.
[0033] Further, the core concrete 5 and the inner wall of the prestressed high-strength concrete thin-walled pipe pile 1 are pre-coated with cement slurry; the core concrete 5 and the pile cap 2 are poured at the same time.
[0034] Further, the top of the pile cap 2 is paved with a certain thickness of gravel cushion 3; the upper layer of the gravel cushion 3 is a cement soil layer, the upper layer of the cement soil layer is a boarding, and the top of the boarding is an asphalt surface layer.
[0035] Further, it further includes a settlement plate 15, the top of the settlement plate 15 is welded and fixed with a measuring rod 6, the measuring rod 6 is externally sleeved with a sleeve pipe 7, the settlement plate 15 is buried before filling after the completion of soft foundation treatment, when buried, the settlement plate 15 should be flat, a sand cushion layer is laid under it, the upper opening of the sleeve pipe 7 should be covered to seal the pipe opening, and the top of the cover should be at least 50cm higher than the rolling surface height.
[0036] Further, the settlement plate 15 is made of steel plate, the measuring rod 6 is made of steel pipe, and the sleeve pipe 7 is made of plastic pipe.
[0037] Further, the broken stone cushion layer 3 is filled in layers, and is paved according to the mixing ratio of 3% and 4% of the layers.
[0038] Further, the plate contains steel bars and concrete, the steel bars are arranged on the back of the abutment in longitudinal and transverse directions according to intervals, and one end of the steel bars is embedded in the back wall of the abutment, the oil felt 11 is laid on the bracket 16 or the back of the abutment, the anchor bar 10 on the plate is coated with asphalt and is provided with the steel pipe 12, the plate and the back wall are coated with the oil-impregnated fiber plate 13 and are filled with the asphalt mastic filler 14, the water-stable broken stone layer 8 is filled between the plate and the cushion layer, finally, the asphalt concrete is paved, and the longitudinal tie rod 9 is used to connect the plate and the concrete transition section.
[0039] The specific construction method of the utility model is as follows:
[0040] The abutment back structure and construction method of the high fill embankment bridge head are characterized in that: high-strength concrete thin-wall pipe piles are sequentially constructed, pile caps are laid, broken stone cushion layers are arranged, the layers are filled, and the plates are erected, so that an organic whole is formed, the load of the upper part is transmitted to the foundation, the pipe piles are used to disperse the road surface load by using the good bearing capacity of the pipe piles, the uneven settlement of the high fill abutment back and the occurrence of the bridge head bumping phenomenon can be solved, the construction method is simple and reliable, the construction time can be greatly shortened, the engineering cost can be reduced, the uneven settlement phenomenon can be effectively alleviated, the damage of the soil embankment, the abutment back, and the abutment part can be reduced, the overall strength, stability, and compression resistance of the abutment back are increased, the occurrence of the bridge head bumping phenomenon is reduced, and the driving comfort is improved.
Claims
1. A high embankment subgrade abutment back structure, characterized in that, The abutment back structure is used for connecting the abutment and the roadbed part, a bearing platform is arranged on the top of the pile foundation, the top of the bearing platform is vertically poured with the abutment, one side of the upper part of the abutment is provided with a pile cap (2), the other side is provided with a beam plate, and the top of the abutment is paved with a bridge deck, and the top of the bridge deck is paved with an asphalt surface.
2. The abutment structure of a high-filled roadbed bridge head according to claim 1, wherein The pile foundation adopts prestressed high-strength concrete thin-walled pipe piles (1), the prestressed high-strength concrete thin-walled pipe piles (1) adopt factory-produced hollow cylindrical concrete prefabricated components with equal cross sections, which are composed of a cylindrical pile body, prestressed steel bars and stirrups, end head plates and steel hoops; the prestressed high-strength concrete thin-walled pipe piles (1) are statically pressed on the site foundation by using a hydraulic crawler pile driver, and carbon dioxide gas shielded welding is simultaneously used.
3. The abutment structure of a high-filled roadbed bridge head according to claim 2, characterized in that, A supporting plate (4) is arranged inside the prestressed high-strength concrete thin-walled pipe pile (1) at a certain height from the top of the pile, and the inside of the prestressed high-strength concrete thin-walled pipe pile (1) and the top of the supporting plate (4) are poured with core concrete (5); the pile cap (2) is connected with the top of the prestressed high-strength concrete thin-walled pipe pile (1) by using steel bars, and is arranged in a square shape.
4. The abutment structure of a high-filled roadbed bridge head according to claim 3, wherein The core concrete (5) and the inner wall of the prestressed high-strength concrete thin-walled pipe pile (1) are pre-coated with cement grout; the core concrete (5) and the pile cap (2) are poured simultaneously.
5. The abutment structure of a high-filled roadbed bridge head according to claim 3, wherein A certain thickness of gravel cushion (3) is arranged on the top of the pile cap (2); the upper layer of the gravel cushion (3) is a cement soil layer, the upper layer of the cement soil layer is a deck plate, and the top of the deck plate is an asphalt surface.
6. The abutment structure of a high fill roadbed bridge head according to claim 1, wherein It also includes a settlement plate (15), the top of the settlement plate (15) is welded and fixed with a measuring rod (6), the measuring rod (6) is sleeved with a sleeve pipe (7), the settlement plate (15) is buried before filling after the completion of soft foundation treatment, the settlement plate (15) should be flat during the burial, a sand cushion layer is laid under the settlement plate (15), the upper opening of the sleeve pipe (7) should be covered to seal the pipe opening, and the top of the cover should be at least 50 cm higher than the rolling surface height.
7. The abutment structure of a high-filled embankment bridge head according to claim 6, characterized in that, The settlement plate (15) is made of steel plate, the measuring rod (6) is made of steel pipe, and the sleeve pipe (7) is made of plastic pipe.
8. The abutment structure of a high-filled embankment bridge head according to claim 5, wherein The gravel cushion (3) is filled in layers; The deck plate contains steel bars and concrete, the steel bars are arranged on the back of the abutment according to intervals in the longitudinal and transverse directions, and one end of the steel bars penetrates into the abutment back wall, the oil felt (11) is laid on the corbel (16) or the abutment back, the anchor bar (10) on the deck plate is coated with asphalt and is provided with a steel pipe (12), the deck plate and the back wall are coated with oil-impregnated fiber board (13) and filled with asphalt mastic filling (14), the deck plate and the cushion layer are filled with water-stable gravel layer (8), and finally asphalt concrete is paved, and the deck plate and the concrete transition section are connected by longitudinal tie rods (9).