Embedded type composite guide plate structure for absorbing horizontal deformation in integral bridge and construction method of embedded type composite guide plate structure

Abstract

The invention discloses an embedded type composite guide plate structure for absorbing horizontal deformation in an integral bridge, which comprises a bridge abutment, an asphalt pavement layer, a geogrid reinforced pavement structure, a support plate, an embedded type guide plate, an elastic joint filling layer, an EPS (Expandable Polystyrene) base layer, a foam concrete base layer and a sleeper beam, the embedded guide plate is located on the sleeper beam, the geogrid reinforced pavement structure is located on the supporting plate and the embedded guide plate, and an asphalt pavement layer is arranged on the pavement structure. The deformation adapting capacity of the whole bridge can be effectively improved, the driving comfort and safety are improved, and the method is suitable for further application and popularization.

Description

Technical Field

[0001] The invention relates to the field of bridge construction, and in particular to an embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge and a construction method thereof. Background Art

[0002] The expansion devices set in the expansion joints of bridges are often damaged or even fail under the influence of temperature loads, vehicle loads, etc., which reduces the usability, safety and durability of the bridge. In order to fundamentally solve the problem of the fragility of bridge expansion joints, reducing or eliminating expansion joints and using seamless bridges is the best way to solve the problem, which improves the integrity of the bridge and its ability to withstand disasters. Among them, the integral bridge has the best integrity.

[0003] The main feature of the integral bridge is the use of integral abutments. The entire superstructure and the flexible pile foundation are cast as a whole. No expansion joints are used on the abutments and bridge decks in the design. The integral bridge structure can be single-span or multi-span continuous. The superstructure within the end range of the approach plate at both ends of the bridge is continuous and there is no bridge expansion device. Under the influence of factors such as bridge load and temperature (thermal expansion and contraction), the integral bridge will produce a certain level of deformation during use.

[0004] In order to avoid the influence of horizontal deformation on the integral bridge, the purpose of the present invention is to provide an embedded composite guide plate structure for absorbing horizontal deformation in the integral bridge to improve the ability of the integral bridge to adapt to deformation and enhance the driving comfort and safety. Summary of the invention

[0005] In order to solve the above problems, the present invention provides an embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge and a construction method thereof.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] An embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge, comprising: an abutment, an asphalt pavement layer, a road surface structure reinforced with geogrids, a support plate, an embedded approach plate, an elastic caulking layer, an EPS (expanded polystyrene) base layer, a foam concrete base layer and a corbel;

[0008] The EPS base layer is arranged on the back of the abutment away from the bridge, the back of the EPS base layer away from the bridge is connected to the foam concrete base layer for retaining soil, and the back of the foam concrete base layer is connected to the fill roadbed;

[0009] The side walls of the foam concrete base and the abutment opposite to each other are both provided with sunken platforms, and the two sunken platforms have the same horizontal height, the top surface of the EPS base is flush with the sunken platforms, a support plate is provided on the top of the two sunken platforms, an elastic caulking layer is provided between the support plate and the side wall of the sunken platform of the foam concrete base, and a sliding layer is provided on the bottom surface of the support plate;

[0010] The bolster is arranged on the side of the foam concrete base facing the fill roadbed, and an embedded guide plate is arranged on the top of the bolster, and the upper and lower surfaces of the embedded guide plate and the end of the guide plate are provided with a sliding layer;

[0011] The geogrid-reinforced pavement structure is arranged on the sliding layer on the upper surface of the embedded guide plate, the foam concrete base, the fill roadbed and the support plate; the geogrid-reinforced pavement structure, the abutment and the top of the bridge are paved with an asphalt paving layer.

[0012] As a possible implementation mode, further, the geogrid-reinforced pavement structure is an equidistant geogrid-reinforced pavement, which is composed of geogrids and crushed stones; the geogrids and crushed stones are arranged at intervals.

[0013] As a possible implementation, further, the geogrid is anchored in the earth-filled roadbed, and the pavement structure reinforced with the geogrid is longitudinally connected to the support plate through tie bars. Specifically, the upper part of the tie bar is connected to the geogrid, and the lower part of the tie bar is connected to the support plate.

[0014] As a possible implementation manner, further, the support plate is connected to the abutment via anchor bars.

[0015] As a preferred implementation manner, preferably, the sliding layer on the upper surface of the embedded guide plate, the foam concrete base layer, the fill roadbed and the top surface of the support plate are flush with each other.

[0016] As a possible implementation manner, further, an isolation layer is laid on the upper surface of the geogrid-reinforced pavement structure and the abutment, and the isolation layer covers the junction between the geogrid-reinforced pavement structure and the abutment.

[0017] As a possible implementation manner, further, the asphalt pavement layer is provided with a cutout at the junction of the geogrid-reinforced pavement structure and the abutment.

[0018] As a possible implementation manner, further, one end of the embedded guide plate away from the foam concrete base layer is tilted downwardly, and the tilt angle is not greater than 5°.

[0019] The present invention also provides a construction method for an embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge, comprising the following steps:

[0020] 1) After the main structure of the main beam is completed, the soil behind the abutment is excavated;

[0021] 2) Lay fill soil, EPS base and foam concrete base, and reserve a sunken platform for placing the support plate on the opposite side of the abutment and the foam concrete base;

[0022] 3) Lay the sleeper beam on the rear side of the foam concrete base and reserve a position for the embedded approach plate on the fill roadbed;

[0023] 4) Lay the sliding layer on the sunken platform of the abutment and foam concrete base, EPS base, pillow beam and the reserved embedded approach plate placement position;

[0024] 5) The construction support plate is placed on the sunken platforms on both sides with sliding layers, and connected to the abutments through anchor bars. An elastic caulking layer is constructed on the end of the support plate away from the abutments, and tie bars are reserved on the support plate;

[0025] 6) Construction: The embedded approach plate is placed on the bolster with the sliding layer and the embedded approach plate placement position, and the sliding layer is laid on the end and upper surface of the embedded approach plate;

[0026] 7) Construct a geogrid-reinforced pavement structure, alternately lay geogrids and crushed stones, and connect them to the support plate through tie bars;

[0027] 8) An isolation layer is set above the interface between the geogrid reinforced pavement structure and the abutment, and then an asphalt pavement layer is laid as a whole;

[0028] 9) Use a seam cutter to cut seams in the asphalt pavement layer to complete the construction of the entire bridge.

[0029] As a possible implementation, further, in step 9), a seam cutter is used to cut the asphalt pavement layer at the junction of the geogrid-reinforced pavement structure and the abutment.

[0030] The beneficial effects of the present invention are:

[0031] The present invention has a simple structure and a reasonable design. The deformation of the main beam is transferred to the elastic filler by connecting the support plate with the abutment. The geogrid reinforced pavement structure alleviates the stiffness change caused by the rigid abutment to the flexible roadbed. The support plate is connected by tie bars to increase the shear resistance and deformation capacity of the support plate, improve the durability and service life of the support plate, effectively enhance the ability of the overall bridge to adapt to deformation, and improve driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] The designations in the accompanying drawings are as follows:

[0034] 1- abutment; 2- asphalt pavement layer; 3- fill roadbed; 4- support plate; 5- embedded approach plate; 6- elastic caulking layer; 7- EPS base layer; 8- foam concrete base layer; 9- corbel; 10- sliding layer; 11- crushed stone; 12- geogrid; 13- tie bar; 14- isolation layer; 15- cut; 16- anchor bar. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See attached Figure 1 The present embodiment provides an embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge, comprising: an abutment 1, an asphalt pavement layer 2, a pavement structure reinforced with geogrids, a support plate 4, an embedded guide plate 5, an elastic caulking layer 6, an EPS base layer 7, a foam concrete base layer 8 and a sleeper beam 9.

[0037] The EPS (expanded polystyrene) base layer 7 is arranged on the back of the abutment 1 away from the bridge 17, and is used to support the abutment 1 and absorb the horizontal deformation of the abutment 1. The back of the EPS base layer 7 away from the bridge 17 is connected to the foam concrete base layer 8 for retaining, and the back of the foam concrete base layer 8 is connected to the fill roadbed 3.

[0038] Sunken platforms are provided on the side walls of the foam concrete base 8 opposite to the abutment 1, and the two sunken platforms have the same horizontal height. The top surface of the EPS base 7 is flush with the sunken platforms. A support plate 4 is provided on the top of the two sunken platforms, and one end of the support plate 4 is connected to the abutment 1. An elastic caulking layer 6 is provided between the support plate 4 and the side wall of the sunken platform of the foam concrete base 8. In this embodiment, the elastic caulking layer 6 is made of asphalt or rubber to absorb deformation.

[0039] The bottom surface of the support plate 4 is provided with a sliding layer 10, and the support plate 4 is connected to the abutment 1 through anchor bars 16; in this embodiment, the sliding layer 10 can be made of fine sand, oil felt, galvanized iron sheet, etc., to reduce the friction resistance of the guide plate or the support plate to better transmit the expansion and contraction deformation of the main beam. When the entire bridge undergoes horizontal deformation, the deformation can be transmitted to the elastic caulking layer 6 through the support plate 4, and the elastic caulking layer 6 can be adaptively expanded and contracted according to the deformation amount to absorb the deformation.

[0040] The bolster 9 is arranged on the side of the foam concrete base 8 facing the fill roadbed 3, and the top of the bolster 9 is provided with an embedded guide plate 5, wherein the bolster 9 plays a supporting role for the embedded guide plate 5. In this embodiment, the end of the embedded guide plate 5 away from the foam concrete base 8 is inclined downward, and the inclination angle is not greater than 5°. The embedded guide plate 5 buried under the road surface can provide greater rigidity for the asphalt concrete road surface thereon, provide a rigidity transition section between the road surface and the bridge, and help alleviate the problem of vehicle jumping caused by the settlement of the fill behind the platform. The embedded guide plate 5 is tilted downward, which can make the transition of rigidity smoother, and the longitudinal slope of the inclined embedded guide plate 5 is generally not greater than 5% to prevent the guide plate from sliding downward. The upper and lower surfaces of the embedded guide plate 5 and the end of the guide plate are provided with a sliding layer 10.

[0041] The geogrid reinforced pavement structure is arranged on the sliding layer 10 on the upper surface of the embedded guide plate 5, the foam concrete base 8, the fill roadbed 3 and the support plate 4; wherein the geogrid reinforced pavement structure is an equidistant geogrid reinforced pavement, which is composed of geogrids 12 and crushed stones 11; the geogrids 12 and crushed stones 11 are arranged at intervals, the geogrids 12 are anchored in the fill roadbed 3, and the geogrid reinforced pavement structure is longitudinally connected to the support plate 4 through tie bars 13 (specifically, the upper part of the tie bars 13 is connected to the geogrid 12, and the lower part of the tie bars 13 is connected to the support plate 4). This arrangement connects the geogrid reinforced pavement structure and the support plate to form a whole, which can better adapt to the deformation of the abutment, and also increases the shear resistance and deformation capacity of the support plate 4. In this embodiment, the top surface of the geogrid reinforced pavement structure is consistent with the top surface of the fill roadbed of the connection pavement, and the geogrid reinforced pavement structure alleviates the stiffness change caused by the rigid abutment to the flexible roadbed.

[0042] In this embodiment, an isolation layer 14 is laid on the upper surface of the geogrid-reinforced pavement structure and the abutment 1, and the isolation layer 14 covers the connection between the geogrid-reinforced pavement structure and the abutment 1; in this embodiment, the isolation layer 14 is made of polyurethane asphalt, which is used to prevent the cracks formed between the abutment 1 and the geogrid-reinforced pavement structure during the deformation of the bridge body from extending to the asphalt pavement layer 2.

[0043] An asphalt pavement layer 2 is paved on the geogrid-reinforced pavement structure, abutment 1 and the top of the bridge 17. The asphalt pavement layer 2 is provided with a cut 15 at the junction of the geogrid-reinforced pavement structure and the abutment 1 to prevent irregular cracking of the asphalt pavement layer 2 during deformation of the bridge body.

[0044] This embodiment also provides a construction method for an embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge, comprising the following steps:

[0045] 1) After the main structure of the main beam is completed, the soil behind one abutment is excavated;

[0046] 2) Laying fill soil and EPS base layer 7 and foam concrete base layer 8, and reserving a sunken platform for placing the support plate 4 on the opposite side of the abutment 1 and the foam concrete base layer 8;

[0047] 3) Lay the sleeper beam 9 on the rear side of the foam concrete base 8, and reserve a position for the embedded approach plate 5 on the fill roadbed 3;

[0048] 4) Laying a sliding layer 10 on the sunken platform of the abutment 1 and the foam concrete base 8, the EPS base 7, the bolster 9 and the reserved placement position of the embedded approach plate 5;

[0049] 5) The construction support plate 4 is placed on the sunken platforms on both sides with the sliding layer 10, and is connected to the abutment 1 through the anchor bars 16. The elastic caulking layer 6 is constructed on the plate end of the support plate 4 away from the abutment, and the tie bars 13 are reserved on the support plate 4;

[0050] 6) Construction: The embedded approach plate 5 is placed on the bolster 9 and the embedded approach plate 5 placement position on which the sliding layer 10 is laid, and the sliding layer 10 is laid on the end and upper surface of the embedded approach plate 5;

[0051] 7) constructing a geogrid reinforced pavement structure, alternately laying geogrids 12 and crushed stones 11, and connecting them with the support plate 4 through tie bars 13;

[0052] 8) An isolation layer 14 is provided above the interface between the geogrid reinforced pavement structure and the abutment 1, and then an asphalt pavement layer 2 is laid as a whole;

[0053] 9) Use a seam cutter to cut the asphalt pavement layer 2 at the junction of the geogrid reinforced pavement structure and the abutment 1 to complete the construction of the entire bridge.

[0054] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge, characterized in that: include: Abutment (1), asphalt pavement layer (2), geogrid reinforced pavement structure, support plate (4), embedded guide plate (5), elastic caulking layer (6), EPS base layer (7), foam concrete base layer (8) and corbel (9); The EPS base layer (7) is arranged on the back side of the abutment (1) away from the bridge (17), the back side of the EPS base layer (7) away from the bridge (17) is connected to a foamed concrete base layer (8) for retaining soil, and the back side of the foamed concrete base layer (8) is connected to a fill roadbed (3); The side walls of the foam concrete base (8) and the abutment (1) opposite to each other are both provided with sunken platforms, and the two sunken platforms are at the same level. The top surface of the EPS base (7) is flush with the sunken platforms. A support plate (4) is provided on the top of the two sunken platforms. An elastic caulking layer (6) is provided between the support plate (4) and the side walls of the sunken platforms of the foam concrete base (8). A sliding layer (10) is provided on the bottom surface of the support plate (4); The bolster (9) is arranged on the side of the foam concrete base (8) facing the fill roadbed (3), and an embedded guide plate (5) is arranged on the top of the bolster (9), and the upper and lower surfaces of the embedded guide plate (5) and the end of the guide plate are provided with a sliding layer (10); The geogrid-reinforced pavement structure is arranged on a sliding layer (10) on the upper surface of an embedded guide plate (5), a foam concrete base (8), a fill roadbed (3) and a support plate (4); the geogrid-reinforced pavement structure, abutments (1) and the top of a bridge (17) are paved with an asphalt pavement layer (2).

2. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 1, characterized in that: The geogrid-reinforced pavement structure is an evenly spaced geogrid-reinforced pavement, which is composed of geogrids (12) and crushed stones (11); the geogrids (12) and crushed stones (11) are arranged at intervals.

3. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 2, characterized in that: The geogrid (12) is anchored in the earth-filled roadbed (3), and the road surface structure reinforced by the geogrid is longitudinally connected to the support plate (4) via tie bars (13).

4. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 3, characterized in that: The support plate (4) is connected to the abutment (1) via anchor bars (16).

5. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 1, characterized in that: The sliding layer (10) on the upper surface of the embedded guide plate (5), the foam concrete base (8), the fill roadbed (3) and the top surface of the support plate (4) are flush with each other.

6. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 1, characterized in that: An isolation layer (14) is laid on the upper surface of the geogrid-reinforced pavement structure and the abutment (1), and the isolation layer (14) covers the junction between the geogrid-reinforced pavement structure and the abutment (1).

7. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 1, characterized in that: The asphalt pavement layer (2) is provided with a cutout (15) at the junction of the geogrid-reinforced pavement structure and the abutment (1).

8. The embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 1, characterized in that: The end of the embedded guide plate (5) away from the foam concrete base (8) is arranged to be tilted downward, with an inclination angle of no more than 5°.

9. A construction method for an embedded composite approach plate structure for absorbing horizontal deformation in an integral bridge, characterized in that: The steps include: 1) After the main structure of the main beam is completed, the soil behind the abutment (1) is excavated; 2) Laying fill soil and EPS base layer (7) and foam concrete base layer (8), and reserving a sunken platform for placing a support plate (4) on the opposite side of the abutment (1) and the foam concrete base layer (8); 3) Laying a sleeper beam (9) on the rear side of the foam concrete base (8), and reserving a position for placing the embedded approach plate (5) on the earth-filled roadbed (3); 4) Laying a sliding layer (10) on the sunken platform of the abutment (1) and the foam concrete base (8), the EPS base (7), the bolster (9) and the reserved placement position of the embedded approach plate (5); 5) The construction support plate (4) is placed on the two side sunken platforms with the sliding layer (10) laid thereon, and is connected to the abutment (1) through anchor bars (16), an elastic caulking layer (6) is constructed on the plate end of the support plate (4) away from the abutment, and tie bars (13) are reserved on the support plate (4); 6) Construction: placing the embedded approach plate (5) on the bolster (9) and the embedded approach plate (5) on which the sliding layer (10) is laid, and laying the sliding layer (10) on the end and upper surface of the embedded approach plate (5); 7) constructing a geogrid reinforced pavement structure, alternately laying geogrids (12) and crushed stones (11), and connecting them to the support plate (4) through tie bars (13); 8) Arranging an isolation layer (14) above the interface between the geogrid reinforced pavement structure and the abutment (1), and then laying an asphalt pavement layer (2) as a whole; 9) Use a seam cutter to make seam cuts on the asphalt pavement layer (2) to complete the construction of the entire bridge.

10. The construction method of the embedded composite guide plate structure for absorbing horizontal deformation in an integral bridge according to claim 9, characterized in that: In step 9), a seam cutter is used to cut the asphalt pavement layer (2) at the junction of the geogrid reinforced pavement structure and the abutment (1).

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