A structure and adjustment method for regulating uneven settlement of subgrade

Abstract

The present invention relates to a structure for regulating uneven settlement of a roadbed, comprising a pavement structure layer and a concrete layer located below the pavement structure layer, and is characterized in that: it also comprises an inflatable settlement bag layer located below the concrete layer, and the inflatable settlement bag layer is formed by stacking at least two inflatable settlement bags up and down; it also comprises an inflatable bag regulating system and a settlement observation system for observing the settlement of the roadbed, and the settlement observation system is communicatively connected with the inflatable bag regulating system, so as to achieve uniform settlement of the roadbed. Compared with the prior art, the advantage of the present invention is that: it provides a structure for regulating uneven settlement of the roadbed, and the structure can release the gas of the inflatable settlement bag through the pressure regulating system according to the alarm of the settlement system, so as to achieve uniform settlement of the roadbed and avoid "waves" on the road. The structure is convenient to construct, simple in structure, safe and economical, and has a good effect on treating uneven settlement of elevated auxiliary roadbeds in cities.

Description

Technical Field

[0001] The invention belongs to the technical field of construction engineering, and in particular relates to a structure and a method for regulating uneven settlement of a roadbed. Background Art

[0002] With the rapid development of my country's economy, land resources are becoming increasingly scarce. As transportation projects develop, land conservation becomes an important consideration. The construction form of elevated bridges + auxiliary roads occupies less land and is increasingly being adopted by high-grade roads. However, this method makes it inevitable that the auxiliary roads on the soft soil foundation 11' will experience uneven settlement of the roadbed 10'. Since the pedestal 7' and pile foundation 8' under the elevated bridge limit the settlement of the ground road, the roadbed settlement closer to the pedestal 7' is less, and the roadbed settlement farther away from the pedestal is more, thus forming a "wave" on the road (as shown in the attached manual). Figure 1 ), which makes driving uncomfortable and poses certain safety hazards.

[0003] Therefore, in order to ensure traffic safety and smooth driving, coordinating the uneven settlement of the inner and outer lanes of the ground auxiliary road has become an issue that needs to be solved urgently. Summary of the Invention

[0004] The first technical problem to be solved by the present invention is to provide a structure for regulating uneven settlement of roadbed which is convenient to construct, has significant effect, is safe and economical in view of the above-mentioned existing technical status.

[0005] The second technical problem to be solved by the present invention is to provide an adjustment method using the above structure in response to the above-mentioned existing technical status.

[0006] To solve the first technical problem, the technical solution adopted by the present invention is: the structure for regulating uneven settlement of the roadbed includes a pavement structure layer and a concrete layer located below the pavement structure layer, and is characterized in that it also includes:

[0007] An inflatable settlement bag layer, located below the concrete layer, is formed by stacking at least two inflatable settlement bags;

[0008] an inflatable bag regulating system for releasing gas from each inflatable sedimentation bag in the inflatable sedimentation bag layer; and

[0009] The settlement observation system is used to observe the settlement of the roadbed and is connected to the inflatable bag adjustment system to control the inflatable bag adjustment system to release the gas in the corresponding inflatable settlement bags one by one, thereby achieving uniform settlement of the roadbed.

[0010] Furthermore, each of the inflatable sedimentation bags has an inflatable cavity inside, and each of the inflatable sedimentation bags has an air release valve connected to the cavity. Because the pier and pile foundation under the viaduct limit the settlement of the ground road, the roadbed settlement is less close to the pier and more far away from the pier, thus forming a "wave" or bulge in the road. The inflatable settlement bag is set at the position corresponding to the bulge, which makes driving uncomfortable and poses certain safety hazards. The working principle formula of the inflatable settlement bag is: TS = BS-AS, where TS is the settlement adjusted by the inflatable settlement bag, AS is the settlement of the soft foundation at point A, and BS is the settlement of the soft foundation at point B. The settlement that needs to be adjusted is calculated according to the settlement time of the road, and then the number N of inflatable settlement bags stacked in the inflatable settlement bag is calculated. When the settlement difference between points A and B is greater than the alarm value (determined according to calculation, generally controlled at 8mm~12mm), the valve is automatically adjusted by the control system to release the gas of the Nth-level settlement bag, and the roadbed will settle to the appropriate position to ensure uniform settlement.

[0011] In order to be able to better deflate the inflatable sedimentation bag, preferably, a pedestal is provided on one side of the concrete layer, and pressure-regulating wells are respectively provided on the upper and lower sides of the concrete layer corresponding to the pedestal, and the inflatable bag adjustment system is placed in the pressure-regulating well. The inflatable bag adjustment system includes a pressure regulating valve, a pressure regulating system and a deflation pipe connected to the deflation valve of each inflatable sedimentation bag, and each inflatable sedimentation bag is connected to the deflation valve to the pressure-regulating well through the deflation pipe.

[0012] In order to protect the various inflatable sedimentation bags in the inflatable sedimentation bag layer and to facilitate deflation in the future, preferably, a foam box is provided at the junction of the inflatable sedimentation bag layer and the base, and a dense member is provided between the foam box and the inflatable sedimentation bag layer to fill it tightly.

[0013] Furthermore, a crushed stone cushion is provided beneath the aerated settlement bag. This is suitable for shallow soft soil foundation treatment. During construction, a certain thickness of cushion is laid on the foundation surface, or a certain depth of soft soil beneath the base is excavated and filled with sand, crushed stone, and other strong materials in layers, which are then compacted and vibrated.

[0014] In order to prevent cracks from forming in the transition zone between the concrete layer and the existing roadbed, preferably, a steel-plastic bidirectional geogrid is provided on the top surface of the transition zone between the concrete layer and the existing roadbed, wherein the overlap width of the steel-plastic bidirectional geogrid is not less than 2m.

[0015] In order to further reduce the settlement of the concrete layer, preferably, a step is provided at the junction of the concrete layer and the existing roadbed.

[0016] To prevent the inflatable settlement bags from sliding against each other, the exterior surface of each is preferably provided with a non-slip texture, and a leveling sand bag is placed between the inflatable settlement bag layer and the concrete layer. Each inflatable settlement bag is made of high-strength rubber and is filled with high-pressure air at a pressure of 0.5 MPa to 1.0 MPa before use. It has a service life of 20 years or more.

[0017] Furthermore, the settlement observation system includes a first settlement observation point arranged at the curb position on one side of the pavement structure layer and a second settlement observation point at a position ≥5m away from the pedestal. When the settlement difference between the two points is greater than the alarm value, the pressure regulating system automatically adjusts the deflation valve of the inflatable settlement bag to release the corresponding gas in the inflatable settlement bag, so that the roadbed settles to an appropriate position.

[0018] To solve the second technical problem, the present invention further provides a method for adjusting uneven subgrade settlement using the above-mentioned structure, which is characterized by comprising the following steps:

[0019] a. Calculating the amount of settlement that needs to be adjusted based on the settlement time of the road, thereby calculating the number N of inflatable settlement bags stacked in the inflatable settlement bag layer;

[0020] b. After the newly built cap is poured, the roadbed is excavated to the required depth on one side of the road, and the graded crushed stone cushion layer of 20 cm is paved from bottom to top. Several inflatable settlement bags are placed, and the foam box is installed at the junction of the newly built cap. The space between the foam box and the inflatable settlement bag is filled with dense pieces, and the air release valve is connected to the pressure regulating well. The concrete of the concrete layer is poured. After the concrete layer reaches the required strength, the pavement structure is paved;

[0021] c. Set up settlement observation points at the curb position and at a distance of ≥5m from the newly built foundation. When the settlement difference between the two points is greater than the alarm value, the pressure regulating system automatically adjusts the air release valve to release the gas in the Nth-level inflatable settlement bag, so that the roadbed settles to the appropriate position.

[0022] Compared with the existing technology, the advantages of the present invention are: providing a structure and adjustment method for adjusting uneven settlement of the roadbed. The structure can release the gas of the inflatable settlement bag through the pressure regulating system according to the alarm of the settlement system, thereby achieving uniform settlement of the roadbed and avoiding "waves" on the road. This structure is easy to construct, simple in structure, safe and economical, and has a good effect on dealing with uneven settlement of elevated auxiliary roadbeds in cities. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a typical damage diagram of road "waves" in the background technology;

[0024] Figure 2 Schematic diagram of the cross-section structure of the roadbed and the corresponding uneven settlement structure in an embodiment of the present invention;

[0025] Figure 3 for Figure 2 Large sample drawing of the middle C section;

[0026] Figure 4 Schematic diagram of the planar layout of the roadbed and the corresponding uneven settlement structure in an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of an inflatable sedimentation bag in an embodiment of the present invention;

[0028] Figure 6 This is a diagram showing the working principle of the inflatable sedimentation bag in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 6 The figure shows the best embodiment of the present invention. The structure for regulating uneven settlement of the roadbed in this embodiment includes a pavement structure layer 1 and a concrete layer 3 located below the pavement structure layer 1, and also includes an inflatable settlement bag 3 located below the concrete layer 2, the inflatable settlement bag 3 is composed of at least two inflatable settlement bags 31 stacked up and down, and an inflatable bag regulating system for releasing the gas in each inflatable settlement bag 3 in the inflatable settlement bag 3, and also includes a settlement observation system, the settlement observation system is used to observe the settlement of the roadbed, communicate with the inflatable bag regulating system, and then control the inflatable bag regulating system to release the gas in the corresponding inflatable settlement bag 31 one by one, thereby achieving uniform settlement of the roadbed. The structure for regulating uneven settlement of the roadbed can release the gas in the inflatable settlement bag through the pressure regulating system according to the alarm of the settlement system, thereby achieving uniform settlement of the roadbed and avoiding "waves" on the road.

[0031] Specifically, each inflatable settlement bag 31 has an inflatable cavity with a trapezoidal cross-section, and each inflatable settlement bag 31 has an air release valve 35 connected to the cavity. Since the pedestal 7 and the pile foundation under the viaduct limit the settlement of the ground road, the roadbed settlement closer to the pedestal is less, and the roadbed settlement farther from the pedestal is more, thus forming a road "wave" or bulge, and the inflatable settlement bag is set at the position corresponding to the bulge, which makes driving unsmooth and poses certain safety hazards. The working principle formula of the inflatable settlement bag is: TS=BS-AS, where TS is the settlement adjusted by the pneumatic settlement bag, AS is the soft foundation settlement at point A, and BS is the soft foundation settlement at point B. The settlement that needs to be adjusted is calculated based on the settlement time of the road, thereby calculating the number N of stacking of each pneumatic settlement bag 31 in the inflatable settlement bag layer 3. When the settlement difference between points A and B is greater than the alarm value (determined by calculation, generally controlled at 8mm to 12mm), the control system automatically adjusts the valve to release the gas in the Nth-level settlement bag, and the roadbed will settle to the appropriate position to ensure uniform settlement. To better deflate the inflatable sedimentation bags, a cap 7 is provided on one side of the concrete layer of this embodiment. Pressure-regulating wells 6 are provided on the upper and lower sides of the concrete layer corresponding to the cap 7. An inflatable bag adjustment system is placed in the pressure-regulating wells 6. The inflatable bag adjustment system includes a pressure-regulating valve, a pressure-regulating system, and a deflation pipe 34 connected to the deflation valve 35 of each inflatable sedimentation bag 31. Each inflatable sedimentation bag is connected to the deflation valve 35 and the pressure-regulating well 6 via the deflation pipe 34. To prevent the inflatable sedimentation bags 31 from sliding against each other, an anti-slip mesh 37 is provided on the outer surface of each inflatable sedimentation bag 31, and a leveling sand bag 36 is provided between the inflatable sedimentation bag layer 3 and the concrete layer 2. Each inflatable sedimentation bag 31 is made of high-strength rubber and is filled with high-pressure air before use, with a pressure of 0.5MPa to 1.0MPa, and has a service life of ≥20 years.

[0032] In addition, to protect the individual inflatable settlement bags 31 in the inflatable settlement bag 3 and to facilitate future deflation, a foam box 32 is provided at the junction of the inflatable settlement bag 3 and the foundation 7. A dense member 33 is provided between the foam box 32 and the inflatable settlement bag 3 to fill the gap tightly. In this embodiment, the dense member 33 is cotton wool. Each inflatable settlement bag 31 can be inflated on site or in the factory. To protect the edges of the settlement bag from being scratched, a foam box 32 made of soft plastic is provided at the edges. The foam box 32 provides protection while not affecting the settlement of the superstructure. In addition, a crushed stone cushion layer 4 is provided below the inflatable settlement bag. The crushed stone cushion layer 4 is suitable for shallow treatment of soft soil foundations. During construction, a cushion layer of a certain thickness is laid on the foundation surface, or a soft soil layer of a certain depth below the base is excavated and filled with sand, gravel, and other strong materials in layers, and then compacted and vibrated. In addition, a steel-plastic bidirectional geogrid 5 is installed on the top surface of the transition zone between the concrete layer 2 and the existing roadbed. This geogrid 5 prevents cracks from forming in the transition zone between the concrete layer 2 and the existing roadbed. Preferably, the overlap width of the geogrid 5 is no less than 2m. To further reduce concrete layer settlement, a step 20 is provided at the junction of the concrete layer 2 and the existing roadbed.

[0033] The present embodiment also provides an adjustment method for the structure for adjusting uneven settlement of the roadbed, which includes the following steps: a. calculating the settlement amount to be adjusted according to the settlement time of the road, thereby calculating the number N of stacking of each inflatable settlement bag 31 in the inflatable settlement bag layer 3; b. after the cap 7 is poured, the roadbed is excavated on one side of the road to the required depth, and a graded crushed stone cushion layer of 420 cm is spread from bottom to top, and a number of inflatable settlement bags 31 are placed, and a foam box 32 is set at the junction of the cap 7, and a dense member 33 is set between the foam box 32 and the inflatable settlement bag 31 to fill it tightly, and the foam box 32 and the inflatable settlement bag 31 are connected. Connect the vent valve 35 to the pressure regulating well 6, pour the concrete of the concrete layer 2, and when the strength of the concrete layer 2 is reached, pave the road surface structure; c. Set up settlement observation points at the curb 9 position and at a distance of ≥5m from the newly built foundation 7. The settlement observation points are the first settlement observation point 101 set at the curb 9 position on one side of the pavement structure layer 1 and the second settlement observation point 102 at a distance of ≥5m from the foundation 7. When the settlement difference between the two points is greater than the alarm value, the vent valve 35 is automatically adjusted by the pressure regulating system to release the gas from the Nth level inflatable settlement bag 31, so that the roadbed settles to the appropriate position. Specifically, in this embodiment, based on the structure for adjusting uneven settlement of the roadbed, as shown in FIG. Figure 5As shown, first, the settlement BS of point B and the settlement AS of point A are calculated according to the settlement time of the road, and then the settlement amount TS that needs to be adjusted is calculated according to the formula TS=BS-AS, thereby calculating the number of inflatable settlement bags to be stacked N; first, the foundation pit of the cap is excavated, and then the cap 7 is cast. After the cap 7 reaches a fixed strength, the graded gravel cushion layer 4 is paved from bottom to top on one side of the road, and a number of inflatable settlement bags 31 are placed, and leveling sand bags 36 are placed on them; a soft plastic foam box 32 is set at the junction of the inflatable settlement bag 31 and the cap, and the soft plastic foam box 32 and the inflatable settlement bag are connected. 31, cotton wool 33 is placed between them to fill them tightly, and the vent valve 35 is connected to the pressure regulating well 6 through the vent pipe 34; then the C30 concrete layer 2 is poured, and after the C30 concrete reaches the strength, the pavement structure is paved; finally, settlement observation points are set at position A of the curb 9 and at position B (≥5m) farther away from the foundation 7. When the settlement difference between the two points is greater than the alarm value (determined according to calculation, generally controllable at 8mm~12mm), the vent valve 35 is automatically adjusted through the pressure regulating system to release the gas from the Nth-level inflatable settlement bag 31, and the roadbed will settle to the appropriate position to ensure uniform settlement.

Claims

1. A structure for regulating uneven subgrade settlement, comprising a pavement structure layer (1) and a concrete layer (2) located below the pavement structure layer (1), characterized in that: Also included are: An inflatable sedimentation bag (3), located below the concrete layer (2), is formed by stacking at least two inflatable sedimentation bags (31) one above the other; an inflatable bag regulating system for releasing gas in each inflatable sedimentation bag (31) in the inflatable sedimentation bag layer (3); and A settlement observation system is used to observe the settlement of the roadbed, and is connected to the inflatable bag adjustment system for communication, thereby controlling the inflatable bag adjustment system to release the gas in the corresponding inflatable settlement bags (31) one by one, thereby achieving uniform settlement of the roadbed; Each of the inflatable sedimentation bags (31) has an inflatable cavity inside, and each of the inflatable sedimentation bags (31) has an air release valve (35) communicating with the cavity; A cap (7) is provided on one side of the concrete layer (2), and pressure regulating wells (6) are provided on the upper and lower sides of the concrete layer (2) corresponding to the cap (7), respectively. The inflatable bag regulating system is placed in the pressure regulating well (6), and the inflatable bag regulating system includes a pressure regulating valve, a pressure regulating system, and a deflation pipe (34) connected to the deflation valve (35) of each inflatable sedimentation bag (31). Each inflatable sedimentation bag (31) is connected to the deflation valve (35) to the pressure regulating well (6) through the deflation pipe (34).

2. The structure for regulating uneven subgrade settlement according to claim 1, characterized in that: A foam box (32) is provided at the junction of the inflatable sedimentation cladding (3) and the support platform (7), and a dense member (33) is provided between the foam box (32) and the inflatable sedimentation cladding (3) for dense filling.

3. The structure for adjusting uneven subgrade settlement according to claim 2, characterized in that: A crushed stone cushion layer (4) is provided below the inflatable sedimentation bag (3).

4. The structure for regulating uneven subgrade settlement according to claim 3, characterized in that: A steel-plastic bidirectional geogrid (5) is provided between the concrete layer (2) and the top surface of the existing roadbed transition zone.

5. The structure for regulating uneven subgrade settlement according to claim 4, characterized in that: A step (20) is also provided at the junction of the concrete layer (2) and the existing roadbed.

6. The structure for regulating uneven subgrade settlement according to claim 5, characterized in that: The outer surface of each of the inflatable sedimentation bags (31) is provided with an anti-skid mesh (37), and a leveling sand bag (36) is provided between the inflatable sedimentation bag layer (3) and the concrete layer (2).

7. The structure for regulating uneven subgrade settlement according to any one of claims 4 to 6, characterized in that: The settlement observation system comprises a first settlement observation point (101) arranged at the position of the side stone (9) on one side of the pavement structure layer (1) and a second settlement observation point (102) at a position ≥5m away from the foundation (7). When the settlement difference between the two points is greater than an alarm value, the pressure regulating system automatically adjusts the deflation valve (35) of the inflatable settlement bag (31) to release the gas in the corresponding inflatable settlement bag (31), so that the roadbed settles to a suitable position.

8. A method for adjusting the structure for adjusting uneven roadbed settlement according to any one of claims 3 to 7, characterized in that: The following steps are included: a. calculating the amount of settlement that needs to be adjusted based on the settlement time of the road, thereby calculating the number N of inflatable settlement bags (31) stacked in the inflatable settlement bag layer (3); b. After the newly built cap (7) is poured, the roadbed is excavated on one side of the road to the required depth, and the graded crushed stone cushion layer (4) is paved in sequence from bottom to top to 20 cm, and a number of inflatable settlement bags (31) are placed. The foam box (32) is set at the junction of the newly built cap (7), and a dense member (33) is set between the foam box (32) and the inflatable settlement bag (31) to fill it tightly. The air release valve (35) is connected to the pressure regulating well (6), and the concrete of the concrete layer (2) is poured. After the strength of the concrete layer (2) is reached, the road surface structure is paved; c. Set up settlement observation points at the curb (9) and at a distance of ≥5m from the newly built foundation (7). When the settlement difference between the two points is greater than the alarm value, the pressure regulating system automatically adjusts the air release valve (35) to release the gas in the Nth level inflatable settlement bag (31), so that the roadbed settles to the appropriate position.

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