CN214782982U - Roadbed structure suitable for bridge connection - Google Patents

Abstract

The embodiment of the application provides a roadbed structure suitable for bridge connection and a construction method, and belongs to the technical field of bridge connection. The roadbed structure comprises a bridge and a roadbed, wherein the bridge comprises an edge beam positioned on one side in the width direction of the bridge. The road bed includes basic unit, a plurality of backfill layers and a plurality of retaining wall, and the basic unit has the bank protection, and supreme setting gradually in the basic unit down is followed on a plurality of backfill layers, and every backfill layer is provided with a retaining wall in one side that is close to the bank protection on the horizontal direction, and in every two adjacent retaining walls, the retaining wall that is located the upside is more located the retaining wall of downside and is farther away from the bank protection on the horizontal direction. The retaining wall of the top side among a plurality of retaining walls is connected to the boundary beam. The roadbed structure can improve the problem of poor stability of bridge connection.

Description

Roadbed structure suitable for bridge connection

Technical Field

The application relates to the technical field of road and bridge connection, in particular to a roadbed structure suitable for bridge and bridge connection and a construction method.

Background

Along with the development of social economy, the economic activities of human beings become frequent, and the construction density of bridge engineering is increased. The arrangement of bridges on expressways and local main roads has become a normal state, the mutual influence and the mutual crossing form between the bridges and peripheral roads are increasingly serious and complex, but the traditional method is to arrange road network crossing sections on roadbed engineering sections to avoid bridge engineering, because the road of the roadbed sections meets a long continuous beam bridge, a proper breakthrough is difficult to find and smoothly cross the long continuous beam bridge, and the problem of poor stability between the mutually crossed and connected bridge and the road exists.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a roadbed structure suitable for bridge connection, so that the problem of poor stability of the bridge connection is solved.

The embodiment of the application provides a roadbed structure suitable for bridge connection, and the roadbed structure comprises a bridge and a roadbed, wherein the bridge comprises an edge beam positioned on one side in the width direction of the bridge. The road bed includes basic unit, a plurality of backfill layers and a plurality of retaining wall, and the basic unit has the bank protection, and supreme setting gradually in the basic unit down is followed on a plurality of backfill layers, and every backfill layer is provided with a retaining wall in one side that is close to the bank protection on the horizontal direction, and in every two adjacent retaining walls, the retaining wall that is located the upside is more located the retaining wall of downside and is farther away from the bank protection on the horizontal direction. Wherein the retaining wall of the uppermost side among the plurality of retaining walls is connected to the side beam.

Among the above-mentioned technical scheme, through being formed with the bank protection at the bottom of the slope of basic unit, when the guarantee is coordinated with the surrounding environment, can effectively strengthen the stability of roadbed structure toe. The problem of fill road bed stability not enough has been improved through the mode that adopts multilayer retaining wall step by step on the basic unit, and the height that multilayer retaining wall's structure can adapt to is higher than ordinary retaining wall, more is applicable to the construction of high fill road bed, compares in the super high retaining wall of super large area cross section, has improved roadbed structure's stability, adopts multistage retaining wall form can save masonry moreover, and is structural safer, more practices thrift in the economy. More importantly, in this scheme, the road bed adopts bank protection and multilayer retaining wall structure to establish the basis for the side direction of road bridge is connected for the boundary beam of bridge can be under construction with the retaining wall of road bed adoption side direction mode of being connected, has solved road engineering and the not good problem of bridge engineering side direction connection difficulty and stability.

In some embodiments, the roadbed structure further comprises a telescopic mechanism, wherein the telescopic mechanism is connected with the uppermost retaining wall and the side beam. An expansion joint is formed between the retaining wall on the top side and the edge beam, and the telescopic mechanism is used for allowing the retaining wall on the top side and the edge beam to be capable of performing telescopic deformation along the width direction of the expansion joint.

Among the above-mentioned technical scheme, through being formed with the expansion joint between retaining wall and the boundary beam of the top to carry out effective connection through telescoping device, can coordinate the road fill road bed and the deformation of the boundary beam of plugging into, ensured the holistic structural safety of bridge, and effectually alleviated the phenomenon of bridge head jump car, ensured the smooth and easy connection between the bridge road.

In some embodiments, a side of an uppermost retaining wall of the plurality of retaining walls, which is adjacent to the edge beam, is provided with a first groove, and a side of the edge beam, which is adjacent to the uppermost retaining wall of the plurality of retaining walls, is provided with a second groove; the first groove and the second groove are matched to form an accommodating groove for accommodating the telescopic mechanism.

Among the above-mentioned technical scheme, the telescopic machanism part is arranged in the retaining wall of the top, and partly is arranged in the boundary beam to constitute telescopic machanism's accommodation space, can play limiting displacement to telescopic machanism, prevent telescopic machanism skew. Through the effective connection between retaining wall and the boundary beam of telescopic machanism with the top, improved telescopic machanism's connection stability.

In some embodiments, the roadbed structure further comprises a first slope protection platform, wherein the first slope protection platform is arranged on the top of the base layer and is positioned between the slope protection and the retaining wall at the lowest side in the plurality of retaining walls in the horizontal direction.

Among the above-mentioned technical scheme, through having built by laying bricks or stones first bank protection platform between bank protection and the retaining wall of downside most, first bank protection platform can prevent effectively that the rainwater from permeating to the basic unit in, avoids the rainwater to infiltrate the overall stability who influences the basic unit.

In some embodiments, the roadbed structure further includes a second slope protection platform, the second slope protection platform is arranged on the top of the backfill layer and is located between two adjacent retaining walls in the plurality of retaining walls in the horizontal direction, so that the retaining wall located on the upper side is farther away from the slope protection than the retaining wall located on the lower side in the horizontal direction.

Among the above-mentioned technical scheme, build in the top of backfill layer through second bank protection platform to be located between the adjacent retaining wall from top to bottom, can effectively prevent that the rainwater from infiltrating to the backfill layer in, effectively improved the not enough problem of high fill road bed stability. In addition, the second bank protection platform can provide the access way for the bridge beam slab of operation phase, is convenient for inspect and maintain the bridge.

In some embodiments, the retaining wall comprises a bottom plate and a wall body, wherein the bottom plate is connected with the wall body, and the wall body is provided with a plurality of drainage holes which penetrate through the wall body along the thickness direction of the wall body.

Among the above-mentioned technical scheme, through a plurality of outlet that set up on the wall, can effectively discharge the ponding in the backfill layer, avoid ponding long-term overstock in the backfill layer and cause the water level in the backfill layer too high, influence the stability of backfill soil in the backfill layer.

In some embodiments, a gravel back-filter is provided between the wall body of the retaining wall and the backfill layer.

Among the above-mentioned technical scheme, can carry out effective filtration to ponding in the inboard backfill layer of retaining wall through the gravel reversed filter bed, prevent that backfill soil from discharging from the outlet, avoid appearing influencing the phenomenon of roadbed structure's overall stability because of the soil erosion and water loss of backfill soil in the road bed.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic top view of a roadbed structure suitable for bridge connection according to some embodiments of the present application;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a partial schematic view of the edge beam and the second retaining wall of FIG. 2;

fig. 4 is a schematic structural view of the first retaining wall and the first backfill layer in fig. 2.

Icon: the slope protection structure comprises a base layer 10, a steep slope 11, a step surface 12, a slope protection 13, a first slope protection platform 20, a first retaining wall 30, a bottom plate 31, a wall body 32, a water drainage hole 321, a gravel reversed filter layer 33, a first backfill layer 40, a second slope protection platform 50, a second retaining wall 60, a table cap 61, a first groove 610, a second backfill layer 70, a side beam 80, a second groove 81, an expansion joint 90, a roadbed structure 100, a road 101 and a bridge 102.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1, the present embodiment provides a roadbed structure suitable for bridge connection, where bridge 102 is connected to road 101 in a lateral connection manner, and it is understood that the lateral connection means that bridge 102 is connected to road 101 at an angle, for example, at an angle of 90 degrees, and fig. 1 exemplarily shows that bridge 102 is connected to road 101 at an angle of 90 degrees.

Referring to fig. 2, the roadbed structure 100 includes a bridge girder 102 and a roadbed, and the bridge girder 102 includes the edge beam 80 on one side in the width direction thereof. The road bed includes basic unit, a plurality of backfill layers and a plurality of retaining wall, and basic unit 10 has bank protection 13, and supreme setting gradually in basic unit 10 down is followed on a plurality of backfill layers, and every backfill layer is provided with a retaining wall in one side that is close to bank protection 13 on the horizontal direction, and in every two adjacent retaining walls, the retaining wall that is located the upside is more located the retaining wall of downside and is farther away from bank protection 13 on the horizontal direction. Wherein the uppermost retaining wall among the plurality of retaining walls is connected to the side frame 80.

By forming the revetment 13 at the bottom of the foundation 10, the stability of the toe of the roadbed structure 100 can be effectively enhanced while the coordination with the surrounding environment is ensured. The problem of fill road bed stability not enough has been improved through the mode that adopts multilayer retaining wall step by step on basic unit 10, and the height that multilayer retaining wall's structure can adapt to is higher than ordinary retaining wall, more is applicable to high fill road bed construction, compares in the super high retaining wall of super large area cross section, has improved roadbed structure 100's stability, adopts multistage retaining wall form can save masonry worker moreover, and is structural safer, more practices thrift in the economy. More importantly, in the scheme, the roadbed adopts the slope protection 13 and the multilayer retaining wall structure to lay a foundation for the lateral connection of the road and the bridge, so that the boundary beam 80 of the bridge 102 and the retaining wall of the roadbed can be constructed in a lateral connection mode, and the problems of difficulty in lateral connection and poor stability of the road 101 project and the bridge 102 project are solved.

It should be noted that the bridge beam 102 may be a long continuous beam, and the bridge beam may include a plurality of sub-beams in the width direction, wherein the sub-beam on the outer side may be referred to as the edge beam 80, and the edge beam 80 in this embodiment is actually the sub-beam on the side of the bridge beam 102 close to the road subgrade.

In some embodiments, the revetment 13 in the base layer 10 may be a shotcrete revetment, a lattice-planted revetment, or a counter-pressure revetment, among others.

Taking the revetment 13 as the counter-pressure revetment, a grass-planting and irrigation protection layer is disposed on the slope surface of the counter-pressure revetment.

Plant roots stretch into to the soil body of bank protection 13 in the inoxidizing coating through the grass planting irritates, plays the effect of the 13 soil bodies of firm bank protection, and the corresponding slope 13 domatic stability that can improve of bank protection, and then improves 13 bearing performance of bank protection, has also improved 13 aesthetic property of bank protection simultaneously.

The slope ratio of the back pressure protection slope can be 1:2, so that the slope of the 13 slope of the protection slope is moderate, and a good buffer effect is achieved on the slope toe of the roadbed.

In some embodiments, please continue to refer to fig. 1, the roadbed structure 100 can further include a first slope protection platform 20 and/or a second slope protection platform 50.

The first slope protection platform 20 is disposed on the top of the base layer 10 and is located between the slope protection 13 and the lowest retaining wall of the plurality of retaining walls in the horizontal direction.

Through having built by laying bricks or stones first bank protection platform 20 between bank protection 13 and the retaining wall of downside most, first bank protection platform 20 can prevent effectively that the rainwater from permeating to the basic unit in, avoids the rainwater to infiltrate the overall stability who influences the basic unit.

In some embodiments, the first revetment platform 20 may be a concrete pad, cement mortar, or grout rubble, etc.

Taking the first slope protection platform 20 as an example of a grouted rubble, the width of the first slope protection platform 20 may be not less than 3M, and the surface is a 35cm thick M7.5 grouted rubble protection.

The protection of the grout rubble can effectively prevent rainwater from infiltrating into the base layer or the backfill layer, and the stability of the roadbed is ensured.

The first slope protection platform 20 may have an inclination of inclination toward the slope protection 13, and the inclination of inclination may be 3%.

Be equipped with on the domatic of bank protection 13 and plant the grass and irritate the inoxidizing coating and first bank protection platform 20 can have the 3% circumstances of the slope of orientation 13 direction of bank protection, can effectively discharge the ponding on the platform through first bank protection platform 20 to irritate the inoxidizing coating with the ponding water conservancy diversion to the plant grass on the 13 domatic of bank protection in, supply the plant to absorb.

The second slope protection platform 50 is disposed on the top of the backfill layer and is located between two adjacent retaining walls in the plurality of retaining walls in the horizontal direction, so that the retaining wall located on the upper side is farther away from the slope protection 13 than the retaining wall located on the lower side in the horizontal direction.

The second slope protection platform 50 is built at the top of the backfill layer and is positioned between the upper and lower adjacent retaining walls, so that rainwater can be effectively prevented from infiltrating into the backfill layer, and the problem of insufficient stability of the high-fill roadbed is effectively solved. In addition, second slope protection platform 50 can provide access to bridge 102 beam slab during the operation period, which is convenient for inspecting and maintaining bridge 102.

In some embodiments, the second slope protection platform 50 may also be a concrete pad, cement mortar, or grout rubble, etc.

Taking the second slope protection platform 50 as an example of a grouted rubble, the width of the second slope protection platform 50 may be not less than 3M, and the surface is a 35cm thick M7.5 grouted rubble protection.

The protection of the grout rubble can effectively prevent rainwater from infiltrating into the base layer or the backfill layer, and the stability of the roadbed is ensured.

The second slope protection platform 50 may have an inclination of inclination toward the slope protection 13, and the inclination of inclination may be 3%.

Under the condition that second bank protection platform 50 has the slope towards 13 directions of bank protection, second bank protection platform 50 can follow multilayer retaining wall water conservancy diversion to first bank protection platform 20 from top to bottom in proper order with the discharged water in the retaining wall to arrange at last and irritate the inoxidizing coating to the grass planting of 13 faces of bank protection.

In some embodiments, the backfill soil of the backfill layer can be plain soil, sandy soil, earth and stone mixture, and the like.

The backfill soil is used as the soil-stone mixture, and compared with the conventional plain soil, the soil-stone mixture has higher strength, so that the foundation bearing capacity of the backfill layer is correspondingly larger, and the deformation of the roadbed can be resisted better.

Specifically, when the earth and stone mixture is backfilled, the earth and stone mixture can be backfilled layer by layer, and the backfilled soil of each layer is tamped step by step sequentially.

In some embodiments, the retaining wall may be a gravity retaining wall, a cantilevered retaining wall, a buttress retaining wall, or the like, and the retaining wall is illustratively shown in FIG. 3 as a cantilevered retaining wall.

The cantilever type retaining wall is a reinforced concrete structure, and the concrete of the retaining wall can adopt C25, C30 or C40 and the like. The cantilever retaining wall can adapt to a soft foundation, and the height of the wall is generally between 6 and 9 meters. Referring to fig. 3, the cantilever type retaining wall is composed of a bottom plate 31 and a wall body 32 fixed to the bottom plate 31, and the weight of the earth filled in the bottom plate 31 is mainly used to maintain a stable retaining wall.

Wherein, the bottom plate 31 of the retaining wall has a buried depth of not less than 1m, and the bottom of the retaining wall can be tamped with a gravel cushion layer with a thickness of at least 50cm to maintain the stability of the retaining wall.

In some embodiments, referring to fig. 3, the wall 32 has a plurality of drainage holes 321, and the drainage holes 321 penetrate through the wall 32 along the thickness direction of the wall 32.

Through the plurality of the drainage holes 321 arranged on the wall body 32, accumulated water in the backfill layer can be effectively discharged, and the problem that the stability of backfill soil in the backfill layer is influenced due to the fact that the water level in the backfill layer is too high due to long-term accumulation of the accumulated water in the backfill layer is avoided.

The plurality of bleed holes 321 may be sloped in the wall 32 to facilitate efficient drainage of accumulated water within the backfill.

In some embodiments, a gravel back-fill layer 33 is provided between the retaining wall body 32 and the backfill layer.

Through gravel reversed filter 33 can carry out effective filtration to ponding in the inboard backfill layer of retaining wall, prevent that backfill soil from discharging from outlet 321, avoid appearing influencing the phenomenon of the overall stability of roadbed structure 100 because of the soil erosion and water loss of backfill soil in the road bed.

The specific thickness of the gravel pack 33 may be as practical, and the thickness of the gravel pack 33 may be 20 cm.

The gravel pack 33 may be graded crushed stone and pebbles. Through the cooperation of pebbles and graded broken stones, the soil body in the backfill layer can be prevented from losing to a greater degree, and the circulation of accumulated water in the backfill layer is ensured.

In some embodiments, referring to fig. 4, the roadbed structure 100 further comprises a telescoping mechanism (not shown) connected to the retaining wall and the side beams 80 at the uppermost side. An expansion joint 90 is formed between the retaining wall on the uppermost side and the edge beam 80, and the expansion mechanism is used for allowing the retaining wall on the uppermost side and the edge beam 80 to be capable of performing expansion deformation along the width direction of the expansion joint 90.

Through being formed with expansion joint 90 between retaining wall and the boundary beam 80 of the top to carry out effective connection through telescoping device, can coordinate the road 101 fill roadbed with the deformation of the boundary beam 80 of plugging into, ensured bridge 102 holistic structural safety, and the effectual phenomenon of alleviating the bridge head and jumping the car, ensured the smooth and easy connection between the bridge road.

Alternatively, the telescopic device may be a type 80 telescopic device.

In some embodiments, the top of the uppermost retaining wall is provided with a table cap 61, the table cap 61 is integrally cast with the uppermost retaining wall, and fig. 4 shows the uppermost retaining wall having the table cap 61.

In some embodiments, in the case where the table cap 61 is provided on the top of the uppermost retaining wall, the side of the table cap 61 adjacent to the edge beam 80 is provided with the first groove 610, and the side of the edge beam 80 adjacent to the table cap 61 is provided with the second groove 81; the first slot 610 and the second slot 81 cooperate to form an accommodating slot for accommodating the telescoping mechanism.

The telescopic machanism part is arranged in the retaining wall of the top, and one part is arranged in the boundary beam 80, thereby forming the accommodating space of the telescopic machanism, being capable of limiting the telescopic machanism and preventing the telescopic machanism from deviating. The retaining wall on the uppermost side and the boundary beam 80 are effectively connected through the telescopic mechanism, and the connection stability of the telescopic mechanism is improved.

Wherein, pre-buried anchor reinforcing bar in the first groove 610 and the second groove 81 is convenient for with telescopic machanism's being connected. The first channel 610 of the table cap 61 may be cast using C30 steel fiber concrete.

In a second aspect, an embodiment of the present application further provides a construction method of a roadbed structure 100 suitable for bridge connection, where the construction method includes the following steps: and backfilling the slope bottom of the roadbed, and rolling and compacting the backfilling to form the base layer 10 with the revetment 13. Follow supreme a plurality of backfill layers and a plurality of retaining wall of being under construction in proper order on basic unit 10, wherein, correspond backfill layer of construction behind a retaining wall of construction to make every retaining wall lie in a backfill layer that corresponds on the horizontal direction and be close to one side of bank protection 13, and the retaining wall that lies in the upside is more far away from bank protection 13 in the horizontal direction than the retaining wall that lies in the downside. The uppermost retaining wall is attached to the edge beam 80 of the bridge 102.

In the construction method, the slope protection 13 is formed at the bottom of the base layer 10, so that the stability of the slope toe of the roadbed structure 100 can be effectively enhanced while the coordination with the surrounding environment is ensured. Then improved the not enough problem of road bed stability through the mode that adopts multilayer retaining wall step by step on the basic unit, and the height that multilayer retaining wall's structure can adapt to is higher than ordinary retaining wall, more is applicable to high road bed construction, compares in the super high retaining wall of super large area cross section, has improved roadbed structure 100's stability, adopts multistage retaining wall form can save masonry worker moreover, and is structural safer, more practices thrift in the economy. More importantly, in the scheme, the roadbed adopts the slope protection 13 and the multilayer retaining wall structure to lay a foundation for the side connection of the road and the bridge, so that the side beams 80 of the bridge 102 can be connected with the retaining walls of the roadbed in a side connection mode, and the problems of difficulty in side connection and poor stability of the road 101 engineering and the bridge 102 engineering are solved.

In some embodiments, before backfilling the slope bottom of the roadbed, a step surface 12 needs to be excavated on the original steep slope 11, the width of the step surface 12 is not less than 2m, and the slope degree is inclined inwards by 2%.

Therefore, the step surface 12 of the original steep slope 11 can improve the stability of the subsequent backfill layer, and the backfill layer is prevented from moving downwards along the slope direction of the slope to cause instability of the backfill layer.

When the construction of the base layer protection slope 13 is carried out, the process construction of the back pressure protection slope can be adopted, the back pressure protection slope is required to be filled with the earth-rock mixture layer by layer and is compacted by rolling, and the specific height can be determined or adjusted according to the field condition. And after the 13 slope surface of the back-pressure protection slope is leveled, mechanical hydraulic spray-seeding grass irrigation is adopted for greening, and the lawn is maintained after the non-woven fabric is covered.

The specific number of the retaining walls may be determined according to actual conditions on site, and in the present embodiment, fig. 2 exemplarily shows a structural form in which the roadbed structure 100 includes two layers of retaining walls.

The following description will be given taking two-layer retaining wall construction as an example:

when the first retaining wall 30 is constructed, the reinforcing bars of the bottom plate 31 and the wall body 32 of the first retaining wall 30 are arranged at the top of the base layer 10 in the direction close to the first slope platform 20, and then the bottom plate 31 is erected to form a mold, and concrete of the bottom plate 31 is poured. The concrete casting of the bottom plate 31 should be completed once without being interrupted in the width direction. After the concrete strength of the bottom plate 31 of the first retaining wall 30 reaches 2.5MPa, the top surface is roughened, residues are removed, then the wall body 32 is erected, the drainage holes 321 are arranged, and the concrete of the wall body 32 is poured. After the wall body 32 of the first retaining wall 30 reaches 75% of the design strength, the first backfill layer 40 is constructed, and the second revetment platform 50 is built on the surface of the first backfill layer 40 after tamping. After the second slope protection platform 50 is built, the second soil protection wall 60 is constructed in the same way, the process steps of the second soil protection wall 60 are basically the same as those of the first soil protection wall 30, under the condition that the table cap 61 is arranged, the table cap 61 and the second soil protection wall 60 are integrally cast and formed, after the second soil protection wall 60 is constructed, a second backfill layer 70 is backfilled behind the wall, and the backfilling is carried out layer by layer.

In the above-mentioned technology, can effectively prevent retaining wall rainwater infiltration through first bank protection platform 20 to with the domatic on rainwater water conservancy diversion to bank protection 13. The second slope protection platform 50 is built at the top of the backfill layer and is positioned between the upper and lower adjacent retaining walls, so that rainwater can be effectively prevented from infiltrating into the backfill layer, and the problem of insufficient stability of the high-fill roadbed is effectively solved. In addition, second slope protection platform 50 may provide an access way for the beam slab of service life bridge 102, facilitating inspection and maintenance of bridge 102.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (7)

1. A roadbed structure adapted to be bridge-connected, comprising:

a bridge including an edge beam at one side in a width direction thereof;

the roadbed comprises a base layer, a plurality of backfill layers and a plurality of retaining walls, wherein the base layer is provided with a protective slope, the backfill layers are sequentially arranged on the base layer from bottom to top, each backfill layer is provided with one retaining wall on one side close to the protective slope in the horizontal direction, and in every two adjacent retaining walls, the retaining wall on the upper side is farther away from the protective slope than the retaining wall on the lower side in the horizontal direction;

wherein, a plurality of retaining wall of the top in the retaining wall connect in the boundary beam.

2. The ballast structure for bridge connection according to claim 1, further comprising:

the telescopic mechanism is connected with the retaining wall on the uppermost side and the side beam; the retaining wall of the top with form the expansion joint between the boundary beam, telescopic machanism is used for allowing the retaining wall of the top with can follow between the boundary beam the seam width direction at expansion joint takes place flexible deformation.

3. The roadbed structure for bridge connection according to claim 2, wherein the uppermost one of said retaining walls is provided with a first groove on a side thereof adjacent to said side beam, and said side beam is provided with a second groove on a side thereof adjacent to the uppermost one of said retaining walls; the first groove and the second groove are matched to form a containing groove for containing the telescopic mechanism.

4. The ballast structure for bridge connection according to claim 1, further comprising:

first bank protection platform locates the top of basic unit, and be located on the horizontal direction the bank protection is with a plurality of between the retaining wall of the downside in the retaining wall.

5. The ballast structure for bridge connection according to claim 1, further comprising:

the second bank protection platform is located the top on backfill layer, and is in lie in a plurality ofly on the horizontal direction adjacent two in the retaining wall between the retaining wall to the retaining wall that makes to be located the upside is in than the retaining wall that is located the downside is in farther away from on the horizontal direction the bank protection.

6. The roadbed structure suitable for bridge connection according to claim 1, wherein the retaining wall comprises a bottom plate and a wall body, the bottom plate is connected with the wall body, and the wall body is provided with a plurality of drainage holes which penetrate through the wall body in a thickness direction of the wall body.

7. The roadbed structure adapted for bridge connection according to claim 6, wherein a gravel reverse filter is provided between the wall body of the retaining wall and the backfill layer.

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