CN204401452U - Oblique prestressed concrete composite pavement connects with bridge transition structure - Google Patents

Abstract

The utility model discloses a kind of oblique prestressed concrete composite pavement to connect with bridge transition structure, comprise abutment, plate-girder, basic unit, parados, oblique prestressed concrete plate and roadbed, described roadbed contacts with the side of abutment, the top of abutment is located at by the end of plate-girder and parados, be reserved with cold expanding shrinkage between the side of parados and the end of plate-girder and stay groove, the opposite side of parados is outward extended with bracket, the side of roadbed and the side of abutment, the side of parados and the bottom surface of bracket contact, and the outside of bracket contacts with the side of basic unit, the bottom surface of oblique prestressed concrete plate and the upper surface of parados, the upper surface of bracket and the upper surface of basic unit contact, oblique prestressed concrete plate is stepped ramp type structure, the upper surface of oblique prestressed concrete plate is equipped with the first bitumen layer, the upper surface of plate-girder is equipped with layer of concrete and the second bitumen layer successively.The utility model effectively can prevent bumping at bridge-head, and long service life.

Description

Oblique Prestressed Concrete Composite Pavement and Bridge Connection Transition Structure

technical field

The utility model belongs to the technical field of prevention and treatment of vehicle jumping at the bridge head of road engineering, and relates to a bridge-connecting transitional structure with an oblique prestressed concrete composite road surface.

Background technique

With the continuous improvement of road grades, in order to improve the smoothness of the line, the proportion of structures such as bridges, culverts and passages is also increasing. Due to the driving load and self-weight at the back of these structures, the settlement of the structure and the settlement of the back of the platform are inconsistent, resulting in bumps and jumps when high-speed vehicles pass through the road-bridge transition section. The phenomenon of vehicle jumping at the bridge head is also a common problem in highway construction at present, which seriously affects the comfort and safety of driving, and reduces the driving speed of vehicles and the traffic capacity of roads. At the same time, the unfavorable dynamic load and water damage caused by vehicles passing through the transition section of the road and bridge will accelerate the damage of abutments, supports, expansion joints and pavement structures.

At present, the treatment method for the transitional section of the road and bridge is usually to set up the bridge head strap. Expansion joints at the bottom infiltrate, resulting in water and soil loss of fillers and excessive settlement of the embankment, causing the board to be hollowed out, and the board becomes a bending-tension structure, the empty part is easy to crack, and the secondary jumping phenomenon occurs due to the damage of the board Very common, so there is no very effective bridge head jumping treatment method at present.

Utility model content

The purpose of the utility model is to overcome the above-mentioned shortcomings of the prior art, and provide a transitional structure between oblique prestressed concrete composite pavement and the bridge, which can effectively prevent bridge head jumping and has a long service life.

In order to achieve the above-mentioned purpose, the oblique prestressed concrete composite pavement described in the utility model and the bridge transition structure include a bridge abutment, a slab girder, a base, a back wall, an oblique prestressed concrete slab and a subgrade;

The subgrade is in contact with the side of the abutment, the end of the plate girder and the back wall are set on the top of the abutment, and an expansion joint slot is reserved between one side of the back wall and the end of the plate girder. There are corbels extending outward on the other side. The side of the subgrade is in contact with the side of the abutment, the side of the back wall and the bottom of the corbel. The base is on the subgrade, and the outer side of the corbel is in contact with the side of the base. The bottom surface of the prestressed concrete slab is in contact with the upper surface of the back wall, the upper surface of the corbel and the upper surface of the base. The oblique prestressed concrete slab has a stepped structure. Asphalt layer, the upper surface of the slab girder is laid with a concrete layer and a second asphalt layer in sequence, and the end face of the concrete layer is flush with the end face of the second asphalt layer, and the first asphalt layer is flush with the upper side of the oblique prestressed concrete slab Flat, there is an expansion joint slot reserved between the second asphalt layer and the first asphalt layer;

The top of the back wall is flush with the top of the corbel and the top of the base.

It also includes a number of pre-embedded steel bars for expansion joints. One end of all pre-embedded steel bars for expansion joints is buried in the oblique prestressed concrete slab, and the other end protrudes out of the end face of the oblique prestressed concrete slab, and each expansion joint is pre-embedded The steel bars are divided into two groups according to the length. The length of the pre-embedded steel bars for expansion joints in the first group is 3m, and the length of each pre-embedded steel bars for expansion joints in the second group is 4m, and the pre-embedded steel bars for expansion joints in the first group are the same as The pre-embedded steel bars of the expansion joints in the second group are arranged alternately.

The width of the expansion joint groove is 6-7cm.

The utility model has the following beneficial effects:

The oblique prestressed concrete composite pavement described in the utility model is connected with the bridge transition structure through the oblique prestressed concrete slab to replace the bridge head slab, so as to avoid the phenomenon of car jumping due to the damage of the bridge head slab, and at the same time, the oblique prestressed concrete The slab and the slab girder share an expansion joint groove, which reduces the setting of the joint at the bridge head, facilitates the drainage at the bridge head, reduces the damage of water to the low structure, and does not need to be installed on the oblique prestressed concrete slab during laying. The size is limited, which effectively reduces the impact load at the bridge head, and has good impermeability, strong resistance to deformation, low requirements on the subgrade, and can withstand the additional stress caused by differential settlement. The construction is convenient. A structure with good durability reduces the cost of maintenance and repair and improves the service life of the bridge structure.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Among them, 1 is the slab girder, 2 is the abutment, 3 is the first asphalt layer, 4 is the oblique prestressed concrete slab, 5 is the base layer, 6 is the expansion joint groove, 7 is the subgrade, 8 is the back wall, and 9 is the corbel.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to Fig. 1, the oblique prestressed concrete composite pavement described in the utility model and the bridge transition structure include a bridge abutment 2, a slab girder 1, a base layer 5, a back wall 8, an oblique prestressed concrete slab 4 and a subgrade 7 The subgrade 7 is in contact with the side of the abutment 2, the end of the plate girder 1 and the back wall 8 are arranged on the top of the abutment 2, and an expansion joint is reserved between one side of the back wall 8 and the end of the plate girder 1 The groove 6 is left, the other side of the back wall 8 extends outwards with a corbel 9, the side of the subgrade 7 is in contact with the side of the abutment 2, the side of the back wall 8 and the bottom of the corbel 9, and the base 5 is located on the subgrade 7 , and the outer side of the corbel 9 is in contact with the side of the base 5, the bottom surface of the oblique prestressed concrete slab 4 is in contact with the upper surface of the back wall 8, the upper surface of the corbel 9 and the upper surface of the base 5, and the oblique prestressed The stressed concrete slab 4 is a stepped structure, the upper surface of the oblique prestressed concrete slab 4 is laid with the first asphalt layer 3, the upper surface of the slab girder 1 is successively laid with the concrete layer and the second asphalt layer, and the end surface of the concrete layer is in line with the The end faces of the second asphalt layer are flush, the first asphalt layer 3 is flush with the upper side of the oblique prestressed concrete slab 4, and an expansion joint groove 6 is reserved between the second asphalt layer and the first asphalt layer 3; The top of the back wall 8 is flush with the top of the corbel 9 and the top of the base 5 .

It should be noted that the utility model also includes a number of pre-embedded steel bars for expansion joints. One end of all pre-embedded steel bars for expansion joints is embedded in the oblique prestressed concrete slab 4, and the other end extends to the oblique prestressed concrete slab 4. The length of the pre-embedded steel bars for each expansion joint is divided into two groups, in which the length of each pre-embedded steel bar for expansion joints in the first group is 3m, and the length of each pre-embedded steel bar for expansion joints in the second group is 4m. The pre-embedded steel bars for expansion joints in one group and the pre-embedded steel bars for expansion joints in the second group are arranged alternately, and the width of the expansion joint groove 6 is 6-7 cm.

The construction process of the present utility model comprises the following steps:

1) Process the subgrade 7 and construct the abutment 2, obtain the structure of the back wall 8 according to the thickness of the pavement structure layer and the design elevation, then construct the back wall 8 and the corbel 9 on the abutment 2, and then construct the upper part of the subgrade 7 Base 5, during construction, the top of the corbel 9, the top of the back wall 8 and the top of the base 5 are flushed;

2) Erect the slab girder 1 on the abutment 2, and construct the oblique prestressed concrete slab 4 on the upper part of the back wall 8, the corbel 9 and the base layer 5. During construction, bury the telescopic Seam pre-embedded steel bars, and at the same time make the end of the oblique prestressed concrete slab 4 into a step structure, as the expansion joint groove 6, the width and thickness of the step on the oblique prestressed concrete slab 4 are based on the expansion joint groove 6 The size is determined;

3) Construct the first asphalt layer 3 on the upper surface of the oblique prestressed concrete slab 4, and construct the concrete layer and the second asphalt layer sequentially on the upper surface of the slab girder 1.

Claims (3)

1. an oblique prestressed concrete composite pavement connects with bridge transition structure, it is characterized in that, comprise abutment (2), plate-girder (1), basic unit (5), parados (8), oblique prestressed concrete plate (4) and roadbed (7);

Described roadbed (7) contacts with the side of abutment (2), abutment (the top of 2 is located at by end and the parados (8) of plate-girder (1), be reserved with shrinkage joint between the side of parados (8) and the end of plate-girder (1) and stay groove (6), the opposite side of parados (8) is outward extended with bracket (9), the side of roadbed (7) and the side of abutment (2), the side of parados (8) and the bottom surface of bracket (9) contact, basic unit (5) is positioned on roadbed (7), and the outside of bracket (9) contacts with the side of basic unit (5), the bottom surface of oblique prestressed concrete plate (4) and the upper surface of parados (8), the upper surface of bracket (9) and the upper surface of basic unit (5) contact, oblique prestressed concrete plate (4) is stepped ramp type structure, the upper surface of oblique prestressed concrete plate (4) is equipped with the first bitumen layer (3), the upper surface of plate-girder (1) is equipped with layer of concrete and the second bitumen layer successively, and the end face of the end face of layer of concrete and the second bitumen layer, first bitumen layer (3) flushes with the side on oblique prestressed concrete plate (4) top, be reserved with shrinkage joint between second bitumen layer and the first bitumen layer (3) and stay groove (6),

The top of described parados (8) flushes with the top of the top of bracket (9) and basic unit (5).

2. oblique prestressed concrete composite pavement according to claim 1 connects with bridge transition structure, it is characterized in that, also comprise some shrinkage joint embedded bar, one end of all shrinkage joint embedded bar is all embedded in oblique prestressed concrete plate (4), the other end all reaches outside the end face of oblique prestressed concrete plate (4), and each shrinkage joint embedded bar is two groups by length, wherein the length of each shrinkage joint embedded bar is 3m in first group, in second group, the length of each shrinkage joint embedded bar is 4m, and the shrinkage joint embedded bar in shrinkage joint embedded bar in first group and second group is alternately arranged mutually.

3. oblique prestressed concrete composite pavement according to claim 1 connects with bridge transition structure, and it is characterized in that, described shrinkage joint stays the width of groove (6) to be 6-7cm.