Waterproof protection structure for roadbed of plain landform road

Abstract

The utility model relates to the technical field of roadbed waterproofing, in particular to a waterproof protection structure for a roadbed of a plain landform road, which comprises soil, a concave groove is formed in the soil, a layer of graded broken stone is laid at the bottom of the groove, and a layer of waterproof filament geotextile is laid above the graded broken stone. A coarse sand layer is laid on the waterproof filament geotextile, and a pavement base is arranged on the coarse sand layer; fixing steel plates which are transversely arranged and uniformly distributed are embedded in the coarse sand layer, and fixing screw rods are spirally connected into the fixing steel plates; the graded broken stone achieves the purpose of reinforcing the roadbed, the waterproof filament geotextile achieves the waterproof purpose, roadbed damage caused by water seepage is avoided, meanwhile, the multiple sets of fixing steel plates and fixing screw rods are arranged in the coarse sand layer, the fixing steel plates achieve the purpose of supporting the pavement foundation, local collapse of the pavement foundation is avoided, and the pavement foundation is protected. The fixing screw penetrates through the upper and lower end faces of the fixing steel plate and is inserted into the coarse sand layer to reinforce the fixing steel plate.

Description

Technical Field

[0001] The utility model relates to the technical field of roadbed waterproofing, in particular to a roadbed waterproofing protection structure for a plain landform road. Background Art

[0002] The coastal plains originated from shallow sea sediments. The soil is thick and sticky. Most of them are saturated normally compacted clay. The soil types are mostly silt, silty clay, and silty sub-clay. The main characteristics are: high natural water content, large natural porosity, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, and high disturbance. Therefore, the strength of the roadbed in the coastal plain area will be significantly reduced under the action of surface water and groundwater, causing various diseases such as road collapse and cracking, affecting the service life of the road. Therefore, a waterproof protection structure for the roadbed of plain landforms is proposed to address the above problems. Utility Model Content

[0003] The utility model aims to provide a waterproof protection structure for roadbed of plain landforms to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] As an optional solution of the waterproof protection structure for roadbed of plain landform described in the utility model, wherein: a waterproof protection structure for roadbed of plain landform comprises soil,

[0006] The soil is provided with an inwardly concave groove, and a layer of graded crushed stone is laid at the bottom of the groove, and a layer of waterproof filament geotextile is laid on the graded crushed stone, a coarse sand layer is laid on the waterproof filament geotextile, and a road surface base is arranged on the coarse sand layer;

[0007] The coarse sand layer is embedded with a transversely arranged uniformly distributed fixing steel plate, and the fixing steel plate is spirally connected with a fixing screw rod, and the bottom of the fixing screw rod is set at a pointed end;

[0008] Blind ditches opened in the soil are arranged on both sides of the road surface base.

[0009] The coastal plains originated from shallow sea sediments, with thick soil and sticky texture. Most of them are saturated normal compacted clay. The soil types are mostly silt, silty clay, and silty sub-clay. The main characteristics are: high natural water content, large natural porosity, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, and high disturbance. Therefore, the strength of the roadbed in the coastal plain area will be significantly reduced under the action of surface water and groundwater, causing various diseases such as road collapse and cracking, affecting the service life of the road. This structure lays a layer of waterproof filament geotextile and graded crushed stone under the roadbed. The graded crushed stone serves to reinforce the roadbed, and the waterproof filament geotextile serves to waterproof, avoiding water seepage and damage to the roadbed. At the same time, multiple sets of fixed steel plates and fixed screws are arranged inside the coarse sand layer. The fixed steel plate serves to support the roadbed and avoid local collapse of the roadbed. The fixed screw runs through the upper and lower end faces of the fixed steel plate and is inserted into the coarse sand layer to reinforce the fixed steel plate.

[0010] As an optional solution of the waterproof protection structure for the roadbed of a plain terrain road described in the utility model, a sealing layer is arranged between the blind ditch and the road surface foundation, and a composite geogrid for isolating the water body is arranged below the sealing layer.

[0011] When water flows to both sides through the pavement subgrade, the sealing layer serves the purpose of isolation, preventing water from seeping through the pavement subgrade and the blind ditch. At the same time, the blind ditch serves the purpose of water diversion.

[0012] As an optional solution of the waterproof protection structure for the roadbed of a plain landform road described in the utility model, a compacted impermeable layer is arranged on the inner side of the composite geogrid.

[0013] As an optional solution of the waterproof protection structure for the roadbed of a plain terrain road described in the utility model, the composite geogrid includes a group of reinforced grids and two groups of composite membranes, the reinforced grid is arranged between the two groups of composite membranes, and is composited by thermal heating.

[0014] As an optional solution of the waterproof protection structure for the roadbed of a plain terrain road described in the utility model, the composite geogrid is arranged at an inclination below, and the inclined surface of the composite geogrid faces the graded gravel side.

[0015] Composite geogrids are also installed on both sides of the roadbed to prevent water on both sides from infiltrating into the center and causing damage to the roadbed. The composite geogrid serves a certain purpose of isolating the water on both sides. The composite geogrid is arranged at an angle, and the bottoms of the composite geogrids on both sides are close to each other, which can reduce the area of ​​water seepage below and serve a certain waterproof purpose. The impermeable layer is composed of compacted soil and a curing agent, which serves a certain waterproof purpose.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model lays a layer of waterproof filament geotextile and graded crushed stone under the roadbed, wherein the graded crushed stone serves to reinforce the roadbed, and the waterproof filament geotextile serves to waterproof, thereby preventing water from seeping up and causing damage to the roadbed. At the same time, multiple groups of fixed steel plates and fixed screws are arranged inside the coarse sand layer, wherein the fixed steel plates serve to support the roadbed and prevent local collapse of the roadbed, and the fixed screws penetrate the upper and lower end surfaces of the fixed steel plates and are inserted into the coarse sand layer, thereby reinforcing the fixed steel plates.

[0018] When water flows to both sides through the pavement foundation, its sealing layer serves the purpose of isolation, preventing water from seeping through the pavement foundation and the blind ditch. At the same time, the blind ditch serves the purpose of water diversion. Composite geogrids are also arranged on both sides of the roadbed to prevent water from infiltrating into the center and causing damage to the roadbed. The composite geogrid serves the purpose of isolating the water on both sides to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] In the figure: 1. Pavement base; 2. Coarse sand layer; 3. Fixed steel plate; 4. Fixed screw; 5. Waterproof filament geotextile; 6. Graded crushed stone; 7. Impermeable layer; 8. Composite geogrid; 9. Sealing layer; 10. Blind ditch; 11. Soil. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] See also Figure 1 , the utility model provides a technical solution:

[0024] A waterproof protection structure for a roadbed in a plain terrain, comprising soil 11,

[0025] The soil 11 is provided with an inwardly concave groove, and a layer of graded gravel 6 is laid at the bottom of the groove, and a layer of waterproof filament geotextile 5 is laid on the graded gravel 6, and a coarse sand layer 2 is laid on the waterproof filament geotextile 5, and a road base 1 is arranged on the coarse sand layer 2;

[0026] The coarse sand layer 2 is embedded with a transversely arranged evenly distributed fixing steel plate 3, and the fixing steel plate 3 is spirally connected with a fixing screw 4, and the bottom of the fixing screw 4 is set with a pointed end;

[0027] Blind trenches 10 opened inside the soil 11 are provided on both sides of the road base 1 .

[0028] The coastal plains originated from shallow sea sediments. The soil is thick and sticky. Most of them are saturated normally compacted clay. The soil types are mostly silt, silty clay, and silty sub-clay. The main characteristics are: high natural water content, large natural porosity, high compressibility, low shear strength, small consolidation coefficient, long consolidation time, high sensitivity, and high disturbance. Therefore, the strength of the roadbed in the coastal plain area will be significantly reduced under the action of surface water and groundwater, causing various diseases such as road collapse and cracking, affecting the service life of the road. In this structure, a layer of waterproof filament geotextile 5 and graded crushed stone 6 are laid under the roadbed. The graded crushed stone 6 serves to reinforce the roadbed, while the waterproof filament geotextile 5 serves to waterproof and prevent water from seeping up and causing damage to the roadbed. At the same time, multiple groups of fixed steel plates 3 and fixed screws 4 are arranged inside the coarse sand layer 2. The fixed steel plates 3 serve to support the roadbed 1 and prevent local collapse of the roadbed 1, while the fixed screws 4 penetrate the upper and lower end surfaces of the fixed steel plates 3 and are inserted into the coarse sand layer 2 to reinforce the fixed steel plates 3.

[0029] Example 2

[0030] This embodiment is an improvement on embodiment 1. Figure 1 Specifically, a sealing layer 9 is provided between the blind ditch 10 and the road base 1, and a composite geogrid 8 for isolating the water body is provided below the sealing layer 9.

[0031] When water flows to both sides through the roadbed 1, the sealing layer 9 serves the purpose of isolation, preventing the water from seeping through the roadbed 1 and the blind ditch 10, while the blind ditch 10 serves the purpose of water diversion.

[0032] Example 3

[0033] This embodiment is an improvement on embodiment 2. Figure 1 Specifically, a compacted impermeable layer 7 is provided on the inner side of the composite geogrid 8 .

[0034] The composite geogrid 8 comprises a group of reinforced grids and two groups of composite membranes, wherein the reinforced grid is arranged between the two groups of composite membranes and is composited by thermal heating.

[0035] The composite geogrid 8 is arranged at an inclination at the bottom, and the inclined surface of the composite geogrid 8 faces the graded gravel 6 .

[0036] Composite geogrids 8 are also arranged on both sides of the roadbed to prevent water on both sides from infiltrating into the center and causing damage to the roadbed. The composite geogrids 8 have a certain purpose of isolating the water on both sides. The composite geogrids 8 are arranged at an angle, and the bottoms of the composite geogrids 8 on both sides are close to each other, which can reduce the area of ​​water seepage below and achieve a certain waterproof purpose. The impermeable layer 7 is composed of compacted soil and a curing agent, which has a certain waterproof purpose.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waterproof protection structure for roadbed in plain terrain, Features: including soil (11), The soil (11) is provided with an inwardly concave groove, and a layer of graded crushed stone (6) is laid at the bottom of the groove, and a layer of waterproof filament geotextile (5) is laid above the graded crushed stone (6), a coarse sand layer (2) is laid above the waterproof filament geotextile (5), and a road surface base (1) is arranged above the coarse sand layer (2); The coarse sand layer (2) is embedded with a transversely arranged uniformly distributed fixing steel plate (3), and the fixing steel plate (3) is spirally connected with a fixing screw rod (4), and the bottom of the fixing screw rod (4) is set at a pointed end; Blind ditches (10) opened inside the soil (11) are provided on both sides of the road surface base (1).

2. A waterproof protection structure for roadbed in plain terrain according to claim 1, Features: A sealing layer (9) is provided between the blind ditch (10) and the road surface base (1), and a composite geogrid (8) for isolating a water body is provided below the sealing layer (9).

3. A waterproof protection structure for roadbed in plain terrain according to claim 2, Features: A compacted impermeable layer (7) is arranged on the inner side of the composite geogrid (8).

4. A waterproof protection structure for roadbed in plain terrain according to claim 2, Features: The composite geogrid (8) comprises a group of reinforced grids and two groups of composite membranes, wherein the reinforced grid is arranged between the two groups of composite membranes and is composited by thermal heating.

5. A waterproof protection structure for roadbed in plain landform according to claim 2, Features: The composite geogrid (8) is arranged at an inclination at the bottom, and the inclined surface of the composite geogrid (8) is arranged facing the side of the graded crushed stone (6).

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