A lightweight foamed concrete roadbed for the transition section between a road and a bridge

Abstract

The present invention relates to the technical field of road and bridge, in particular to a subgrade of a road and bridge transition section made of foamed lightweight concrete, which includes an abutment and a first foamed lightweight concrete block. The first foamed lightweight concrete block is fixed on the abutment. A beam is fixed on the abutment. A variable stiffness transition mechanism is jointly fixed on the beam, the abutment and the first foamed lightweight concrete block. The variable stiffness transition mechanism includes a second foamed lightweight concrete block, which is fixed on the beam, the abutment and the first foamed lightweight concrete block. The side of the second foamed lightweight concrete block opposite to the beam is a slope surface, and a filled concrete block is fixed on the slope surface of the second foamed lightweight concrete block. When the present invention is in use, the stability of the entire subgrade of the road and bridge transition section is ensured, so that uneven settlement will not occur in the entire subgrade of the road and bridge transition section, ensuring the safety of the entire subgrade of the road and bridge transition section during use.

Description

Technical Field

[0001] The present invention relates to the technical field of road and bridge, and particularly relates to a subgrade of a foam lightweight concrete road and bridge transition section. Background Art

[0002] A bridge refers to a building constructed to span natural or artificial obstacles on a road. It is erected over rivers, lakes and seas to enable vehicles and pedestrians to pass smoothly. A road, in terms of its meaning, is an infrastructure for various trackless vehicles and pedestrians to pass. The connection between a road and a bridge is an important construction point in the entire highway construction process. In order to ensure the safety and stability of the bridge, a subgrade of a transition section is usually set between the bridge and the road. When the existing subgrade of the transition section is laid, it is all laid with concrete made of graded crushed stone and 5% cement. When a vehicle passes by, it will cause pressure on the subgrade of the transition section. Since the subgrade of the transition section cannot be well combined with the beam and abutment of the bridge, and in addition, the subgrade of the transition section simply cannot reach the natural soil bearing stratum, during the long-term use process, the subgrade of the transition section will sink and generate a gap between the beam and abutment of the bridge. And the situation of uneven settlement of the subgrade of the transition section, when serious, directly affects the safety when a vehicle passes by. Therefore, a subgrade of a foam lightweight concrete road and bridge transition section is needed to meet the requirements. Summary of the Invention

[0003] The purpose of the present invention is to solve the defect that the subgrade of the transition section in the prior art is prone to uneven settlement, and to propose a subgrade of a foam lightweight concrete road and bridge transition section.

[0004] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0005] Design a subgrade of a foam lightweight concrete road and bridge transition section, including an abutment and a first foam lightweight concrete block. The first foam lightweight concrete block is fixed on the abutment. A beam is fixed on the abutment. A variable stiffness transition mechanism is jointly fixed on the beam, the abutment and the first foam lightweight concrete block. The variable stiffness transition mechanism includes a second foam lightweight concrete block. The second foam lightweight concrete block is fixed on the beam, the abutment and the first foam lightweight concrete block. The side of the second foam lightweight concrete block opposite to the beam is a slope surface. A filling concrete block is fixed on the slope surface of the second foam lightweight concrete block. A third foam lightweight concrete block is jointly fixed on the slope surface of the filling concrete block and the second foam lightweight concrete block. The third foam lightweight concrete block and the filling concrete block are both fixed on the first foam lightweight concrete block.

[0006] Preferably, a road embankment and a first subgrade bed are jointly fixed on the first foam lightweight concrete block and the second foam lightweight concrete block. The first subgrade bed is fixed on the road embankment.

[0007] Preferably, a second base bed is fixedly arranged on both the second foam light concrete block and the first base bed.

[0008] Preferably, a reinforcement plate is fixedly arranged on both the embankment, the first base bed and the second base bed.

[0009] Preferably, a greening planting mechanism is fixedly arranged on the reinforcement plate.

[0010] Preferably, the greening planting mechanism comprises a protection plate, filling soil and a plurality of holes. The protection plate is fixedly arranged on the reinforcement plate. The filling soil is arranged inside the protection plate. The plurality of holes are uniformly distributed and penetrate through the protection plate.

[0011] Preferably, a water absorption mechanism is fixedly arranged on both the filling soil and the protection plate.

[0012] Preferably, the water absorption mechanism comprises a water collecting cloth and a plurality of water guiding ropes. The water collecting cloth is arranged inside the filling soil. One ends of the plurality of water guiding ropes are fixedly arranged on the water collecting cloth, and the other ends are respectively fixedly arranged in the plurality of holes.

[0013] Preferably, a plurality of insertion columns are uniformly and fixedly arranged on the water collecting cloth. A cloth sleeve is sleeved and fixedly arranged on each insertion column. The cloth sleeve is fixedly arranged on the water collecting cloth. The insertion columns protruding out of the cloth sleeve are inserted into the reinforcement plate. A plurality of thin ropes are fixedly arranged on the cloth sleeve.

[0014] The beneficial effects of a foam light concrete road and bridge transition section subgrade proposed by the present invention are as follows: when in use, the foam light concrete road and bridge transition section subgrade forms a variable stiffness transition mechanism of the road and bridge transition section subgrade by the way that the first foam light concrete block, the second foam light concrete block, the filling concrete block and the third foam light concrete block are fixedly arranged together. Moreover, the first foam light concrete block and the second foam light concrete block in the variable stiffness transition mechanism are fixedly arranged on the abutment and the beam. The raw material foam light concrete in the first foam light concrete block and the second foam light concrete block has the advantages of good bonding performance, can be firmly bonded on the abutment and the beam, and because the first foam light concrete block and the second foam light concrete block are made of foam light concrete, they can reduce the lateral load on the abutment and the beam, will not increase the pressure on the abutment and the beam, and will not affect the service life of the abutment and the beam. In addition, the first foam light concrete block, the second foam light concrete block and the third foam light concrete block surround the filling concrete block. Although the filling concrete block is made of ordinary concrete, it saves the input of foam light concrete raw materials and ensures the stability of the whole road and bridge transition section subgrade, thereby preventing the whole road and bridge transition section subgrade from uneven settlement and ensuring the safety of the whole road and bridge transition section subgrade in use. Brief Description of the Drawings

[0015] Figure 1 It is a schematic structural view of a subgrade of a foam lightweight concrete road - bridge transition section proposed by the present invention;

[0016] Figure 2 It is a foam lightweight concrete road - bridge transition section subgrade proposed by the present invention Figure 1 right view at A - A in it;

[0017] Figure 3 It is a schematic structural view of a water - absorption mechanism of a foam lightweight concrete road - bridge transition section subgrade proposed by the present invention;

[0018] Figure 4 It is a foam lightweight concrete road - bridge transition section subgrade proposed by the present invention Figure 3 enlarged view at B in it.

[0019] In the figure: beam 1, abutment 2, first foam lightweight concrete block 3, second foam lightweight concrete block 4, filled concrete block 5, third foam lightweight concrete block 6, embankment 7, first subgrade bed 8, second subgrade bed 9, protection plate 10, hole 11, water - collecting cloth 12, water - guiding rope 13, reinforcement plate 14, inserted column 15, cloth sleeve 16, thin string 17, filled soil 18. Detailed Description of the Preferred Embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Embodiment 1

[0022] Refer to Figure 1 and 2, a subgrade of a foam lightweight concrete road and bridge transition section, comprising a bridge abutment 2 and a first foam lightweight concrete block 3. The first foam lightweight concrete block 3 is fixed on the bridge abutment 2. A beam 1 is fixed on the bridge abutment 2. A variable stiffness transition mechanism is jointly fixed on the beam 1, the bridge abutment 2 and the first foam lightweight concrete block 3. The variable stiffness transition mechanism includes a second foam lightweight concrete block 4. The second foam lightweight concrete block 4 is fixed on the beam 1, the bridge abutment 2 and the first foam lightweight concrete block 3. The side of the second foam lightweight concrete block 4 opposite to the beam 1 is a slope surface. A filled concrete block 5 is fixed on the slope surface of the second foam lightweight concrete block 4. A third foam lightweight concrete block 6 is jointly fixed on the slope surfaces of the filled concrete block 5 and the second foam lightweight concrete block 4. Both the third foam lightweight concrete block 6 and the filled concrete block 5 are fixed on the first foam lightweight concrete block 3. The side surfaces of the filled concrete block 5 and the third foam lightweight concrete block 6 in contact and fixed are in a stepped shape, increasing the contact area between the third foam lightweight concrete block 6 and the filled concrete block 5, making the fixation between the filled concrete block 5 and the third foam lightweight concrete block 6 more firm. Moreover, the first foam lightweight concrete block 3, the second foam lightweight concrete block 4 and the third foam lightweight concrete block 6 are all made of foam lightweight concrete. The foam lightweight concrete has good bonding performance, low vertical and lateral loads, and good stability.

[0023] A road embankment 7 and a first subgrade bed 8 are jointly fixed on the first foam lightweight concrete block 3 and the second foam lightweight concrete block 4. The first subgrade bed 8 is fixed on the road embankment 7. A second subgrade bed 9 is jointly fixed on the second foam lightweight concrete block 4 and the first subgrade bed 8, enabling the variable stiffness transition mechanism to play a transitional role between the beam 1, the first subgrade bed 8 and the road embankment 7. A reinforcement plate 14 is jointly fixed on the road embankment 7, the first subgrade bed 8 and the second subgrade bed 9. The reinforcement plate 14 is made of concrete, protecting the first subgrade bed 8 and the road embankment 7 from being washed by heavy rain.

[0024] Working principle: During use, the first lightweight foam concrete block 3, the second lightweight foam concrete block 4, the filled concrete block 5, and the third lightweight foam concrete block 6 are fixed together to form a variable stiffness transition mechanism for the subgrade of the road-bridge transition section. Moreover, the first lightweight foam concrete block 3 and the second lightweight foam concrete block 4 in this variable stiffness transition mechanism are fixed on the abutment 2 and the beam 1. The raw material, lightweight foam concrete, in the first lightweight foam concrete block 3 and the second lightweight foam concrete block 4 has the advantage of good bonding performance and can be firmly bonded to the abutment 2 and the beam 1. Also, since the first lightweight foam concrete block 3 and the second lightweight foam concrete block 4 are made of lightweight foam concrete, they can reduce the lateral load on the abutment 2 and the beam 1, will not increase the pressure on the abutment 2 and the beam 1, and will not affect the service life of the abutment 2 and the beam 1. Additionally, the first lightweight foam concrete block 3, the second lightweight foam concrete block 4, and the third lightweight foam concrete block 6 surround the filled concrete block 5. Although the filled concrete block 5 is made of ordinary concrete, it saves the input of lightweight foam concrete raw materials and also ensures the stability of the entire subgrade of the road-bridge transition section. Furthermore, it prevents the entire subgrade of the road-bridge transition section from experiencing uneven settlement and ensures the safety of the entire subgrade of the road-bridge transition section during use.

[0025] Embodiment 2

[0026] In Embodiment 1, the reinforcement plate 14 only protects the first roadbed 8 and the embankment 7 from being scoured by heavy rain, but the area on the reinforcement plate 14 is not fully utilized. Referring to Figure 1-4 , as another preferred embodiment of the present invention, different from Embodiment 1, a greening planting mechanism is fixed on the reinforcement plate 14. The greening planting mechanism is used to make full use of the area on the reinforcement plate 14 and plant greenery on the reinforcement plate 14.

[0027] The greening planting mechanism includes a protection plate 10, filling soil 18, and a plurality of holes 11. The protection plate 10 is fixed on the reinforcement plate 14 and is also made of concrete. The arrangement of the protection plate 10 and the reinforcement plate 14 double-reinforces the side slopes of the first roadbed 8 and the embankment 7. The filling soil 18 is arranged inside the protection plate 10, and the plurality of holes 11 are evenly distributed and penetrate through the protection plate 10, providing space for planting green plants.

[0028] When the green plants are newly planted, since the root systems have not yet fully grown, their ability to absorb water from the soil is still very lacking. If they are not watered in time, under the action of gravity, the upper part of the filling soil 18 between the protection plate 10 and the reinforcement plate 14 is prone to drying, and the green plants planted above the protection plate 10 are prone to withering. A water absorption mechanism is fixedly arranged on the filling soil 18 and the protection plate 10. The setting of the water absorption mechanism can adjust the water in the filling soil 18, make the water in the filling soil 18 as evenly distributed as possible, and ensure the survival rate of the green plants planted above the protection plate 10.

[0029] The water absorption mechanism includes a water collection cloth 12 and a plurality of water guide ropes 13. The water collection cloth 12 is arranged inside the filling soil 18. One ends of the plurality of water guide ropes 13 are fixed on the water collection cloth 12, and the other ends are respectively fixed in a plurality of holes 11. According to the siphon principle, the water collection cloth 12 will absorb the water in the filling soil 18, and the water below the water collection cloth 12 will be transported above the water collection cloth 12, and then absorbed by the plurality of water guide ropes 13. The water guide ropes 13 suck the water in the water collection cloth 12 into the soil in the holes 11.

[0030] A plurality of insertion columns 15 are evenly and fixedly arranged on the water collection cloth 12. A cloth sleeve 16 is sleeved and fixed on each insertion column 15. The cloth sleeve 16 is fixed on the water collection cloth 12. The insertion columns 15 protruding from the cloth sleeve 16 are inserted into the reinforcement plate 14. The setting of the plurality of insertion columns 15 fixes the water collection cloth 12 in the filling soil 18 and is not easy to change its position. A plurality of thin ropes 17 are fixed on the cloth sleeve 16. The plurality of thin ropes 17 can absorb the water in the filling soil 18 and then transmit it to the cloth sleeve 16, and then transmit it to the water collection cloth 12 through the cloth sleeve 16. The cloth sleeve 16 and the plurality of thin ropes 17 play a role of collecting water for the water collection cloth 12.

[0031] Working principle: When in use, the plurality of cloth sleeves 16 and the plurality of thin ropes 17 collect water for the water collection cloth 12. At the same time, if some parts of the filling soil 18 are short of water, the plurality of cloth sleeves 16 and the plurality of thin ropes 17 will also disperse the water on the water collection cloth 12 into the soil in the parts of the filling soil 18 that are short of water, so that the water in the soil of the filling soil 18 is dispersed as much as possible and will not gather at the bottom of the filling soil 18. At the same time, the water collection cloth 12 and the plurality of water guide ropes 13 also supply water to the green plants planted in the plurality of holes 11, avoiding the situation that the green plants planted in the holes 11 above the protection plate 10 are prone to withering, and ensuring the survival rate of the green plants planted in the plurality of holes 11.

[0032] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A subgrade of a foam lightweight concrete road-bridge transition section, comprising an abutment (2) and a first foam lightweight concrete block (3), the first foam lightweight concrete block (3) being fixed on the abutment (2), characterized in that, A beam (1) is fixed on the abutment (2). A variable stiffness transition mechanism is fixed on the beam (1), the abutment (2) and the first lightweight foamed concrete block (3). The variable stiffness transition mechanism includes a second lightweight foamed concrete block (4), which is fixed on the beam (1), the abutment (2) and the first lightweight foamed concrete block (3). The side of the second lightweight foamed concrete block (4) opposite to the beam (1) is a slope surface. A filled concrete block (5) is fixed on the slope surface of the second lightweight foamed concrete block (4). A third lightweight foamed concrete block (6) is fixed on the slope surface of the filled concrete block (5) and the second lightweight foamed concrete block (4). The third lightweight foamed concrete block (6) and the filled concrete block (5) are both fixed on the first lightweight foamed concrete block (3). An embankment (7) and a first subgrade bed (8) are fixed on the first lightweight foamed concrete block (3) and the second lightweight foamed concrete block (4). The first subgrade bed (8) is fixed on the embankment (7). A second subgrade bed (9) is fixed on the second lightweight foamed concrete block (4) and the first subgrade bed (8).

2. The subgrade of the foam lightweight concrete road and bridge transition section according to claim 1, characterized in that, A reinforcement plate (14) is fixed on the embankment (7), the first subgrade bed (8) and the second subgrade bed (9).

3. The lightweight foamed concrete roadbed of the road-bridge transition section according to claim 2, characterized in that, A greening planting mechanism is fixed on the reinforcement plate (14).

4. The subgrade of the foam lightweight concrete road and bridge transition section according to claim 3, characterized in that The greening planting mechanism includes a protection plate (10), filled soil (18) and a plurality of holes (11). The protection plate (10) is fixed on the reinforcement plate (14). The filled soil (18) is arranged inside the protection plate (10). The plurality of holes (11) are evenly distributed and penetrate through the protection plate (10).

5. The subgrade of the foam lightweight concrete road-bridge transition section according to claim 4, characterized in that, A water absorption mechanism is fixed on the filled soil (18) and the protection plate (10).

6. The subgrade of the foam lightweight concrete road-bridge transition section according to claim 5, characterized in that The water absorption mechanism includes a water collecting cloth (12) and a plurality of water guiding ropes (13). The water collecting cloth (12) is arranged inside the filled soil (18). One ends of the plurality of water guiding ropes (13) are fixed on the water collecting cloth (12), and the other ends are respectively fixed in the plurality of holes (11).

7. The subgrade of the foam lightweight concrete road and bridge transition section according to claim 6, characterized in that, A plurality of insertion columns (15) are evenly fixed on the water collecting cloth (12). A cloth sleeve (16) is sleeved and fixed on each insertion column (15). The cloth sleeve (16) is fixed on the water collecting cloth (12). The insertion columns (15) protruding from the cloth sleeve (16) are inserted into the reinforcement plate (14). A plurality of thin ropes (17) are fixed on the cloth sleeve (16).

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