CN212688573U

CN212688573U - Roadbed filling structure

Info

Publication number: CN212688573U
Application number: CN202020325989.4U
Authority: CN
Inventors: 郑密密
Original assignee: Guizhou Minzu University
Current assignee: Guizhou Minzu University
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2021-03-12
Anticipated expiration: 2030-03-16

Abstract

The utility model relates to a roadbed filling structure, including the filler road bed with lay the geogrid on the soil layer, the geogrid all is equipped with the curb along length direction's both sides, and the geogrid upside is laid to the filler road bed, and the filler road bed locates between two curbs, and the filler road bed is including being equipped with pitch layer, metalling, filling layer and building rubbish layer from top to bottom in proper order. The embodiment of the utility model reduces the construction cost and increases the recycling use of the construction waste by arranging the construction waste layer and adopting the construction waste layer to replace the lime soil roadbed; the arranged road shoulder structure can protect the outer wall of the roadbed and enhance the stability of the roadbed; the construction cost is reduced, the problem of collapse of the road surface caused by damage of the roadbed surface structure due to rain erosion is solved, and the construction period is shortened.

Description

Roadbed filling structure

Technical Field

The utility model relates to a highway engineering construction technical field especially relates to a roadbed filling structure.

Background

The high-speed railway subgrade, especially the high-speed railway ballastless track subgrade, has high requirements on deformation control, requires that the post-construction settlement after track laying does not exceed 15mm, and requires that the strength and deformation of the subgrade are stable and unchanged for a long time within the long-term service life range of the line (the design life is generally 100 years). This requires a firm and substantially compression-free foundation for the foundations, as well as a foundation structure that is adapted to the effects of the various natural environments. The existing roadbed structure has some structural problems, and the existing roadbed structure can cause damage to a roadbed surface structure due to rainwater erosion when being used for a long time, so that the collapse of a road surface is caused, and the cost for constructing the road surface is increased.

At present, the roadbed filling construction process of the domestic building market comprises the following steps: and treating the roadbed and the base course with lime soil, sand gravel, lime slag soil, lime ore, limestone gravel soil and the like. The most widely used is the lime soil roadbed, however, the construction of the lime soil is restricted by the following factors: soil sources, channel control (production, transportation, dust raising) of lime governments, weather and other adverse factors. In areas with more seaside mudflats, fish ponds and salt fields, the soil source is lack, the soil is the plastic-flowing sludge clay, the water content is higher, the construction cost is higher by adopting the lime soil, and the construction period is long.

Through the above analysis, the problems and defects of the prior art are as follows:

(1) when the existing roadbed structure is used for a long time, the roadbed surface structure can be damaged due to the erosion of rainwater, so that the collapse of the road surface is caused, and the cost for constructing the road surface is increased.

(2) The existing roadbed structure generally adopts a lime soil roadbed, the construction cost is high and the construction period is long.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem and provide a roadbed filling structure with little, the live time is long to solve above-mentioned at least one technical problem.

The utility model provides an above-mentioned technical problem's technical scheme as follows:

the utility model provides a road bed filling structure, includes filler road bed and lays the geogrid on the soil layer, geogrid all is equipped with the curb along length direction's both sides, the filler road bed is laid the geogrid upside, just the filler road bed is located two between the curb, the filler road bed is including being equipped with pitch layer, metalling, filling layer and building rubbish layer from top to bottom in proper order.

The utility model has the advantages that: the embodiment of the utility model reduces the construction cost and increases the recycling use of the construction waste by arranging the construction waste layer and adopting the construction waste layer to replace the lime soil roadbed; the arranged road shoulder structure can protect the outer wall of the roadbed and enhance the stability of the roadbed; the construction cost is reduced, the problem of collapse of the road surface caused by damage of the roadbed surface structure due to rain erosion is solved, and the construction period is shortened.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, two one side that the curb kept away from each other all is equipped with the gutter.

The beneficial effect of adopting the further scheme is that: the side ditch can be convenient for the discharge of the rivers of the road bed, avoids the accumulation of rainwater.

Further, a transverse drainage channel is arranged between the two side ditches, and two ends of the transverse drainage channel are respectively communicated with the side ditches.

The beneficial effect of adopting the further scheme is that: the transverse drainage channel can facilitate drainage of accumulated water in the roadbed.

Furthermore, each transverse drainage channel is provided with a plurality of longitudinal drainage channels, the lower ends of the longitudinal drainage channels are connected and communicated with the transverse drainage channels, the upper ends of the longitudinal drainage channels penetrate through the asphalt layer, and the upper ends of the longitudinal drainage channels are flush with the upper surface of the asphalt layer.

The beneficial effect of adopting the further scheme is that: the longitudinal drainage channel can facilitate drainage of accumulated water on the surface of the roadbed.

Furthermore, gravels are filled in the longitudinal drainage channel and the transverse drainage channel.

The beneficial effect of adopting the further scheme is that: the filled crushed stones can play a role in filtering and draining water.

Furthermore, the geogrid is provided with fixing nails, and the lower ends of the fixing nails penetrate through the geogrid and are fixedly connected with the soil layer.

The beneficial effect of adopting the further scheme is that: the geogrid can improve the wholeness of road bed and lower extreme soil layer, can guarantee geogrid's fixed fastness through the staple.

Further, the fixing nails are provided in plurality, and the plurality of fixing nails are arranged in a grid shape along the length direction of the geogrid.

The beneficial effect of adopting the further scheme is that: the grid-shaped arrangement can effectively ensure that the geogrid is prevented from sliding.

Further, each fixing nail is circumferentially provided with a plurality of welding points, and the fixing nails are welded with the geogrids through the welding points.

The beneficial effect of adopting the further scheme is that: fixed through the welded mode, can further promote the stability that staple and geogrid are connected.

Furthermore, the filler roadbed is provided with expansion joints at intervals along the length direction, and the expansion joints are filled with joint filling materials.

The beneficial effect of adopting the further scheme is that: the expansion joint can avoid the subgrade to produce the crack or destroy because of expending with heat and contracting with cold, and the joint compound can reduce the temperature change, makes the subgrade difficult to take place expending with heat and contracting with cold to guarantee the roughness on subgrade surface.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

fig. 3 is a schematic structural view of the geogrid of the present invention;

fig. 4 is a schematic structural view of the fixing nail of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. the filling material comprises a filling roadbed, 2 parts of a construction waste layer, 3 parts of a filling layer, 4 parts of a gravel layer, 5 parts of an asphalt layer, 6 parts of a longitudinal drainage channel, 7 parts of a transverse drainage channel, 8 parts of a geogrid, 9 parts of fixing nails, 10 parts of expansion joints, 11 parts of road shoulders, 12 parts of side ditches, 13 parts of filling materials, 14 parts of welding spots.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

Examples

As shown in fig. 1, the core of the utility model is to provide a roadbed filling structure, including packing road bed 1 and laying the geogrid 8 on the soil layer, geogrid 8 all is equipped with curb 11 along length direction's both sides, and packing road bed 1 lays the geogrid 8 upside, and packs road bed 1 and locate between two curb 11, packs road bed 1 including being equipped with pitch layer 5 from top to bottom in proper order, metalling 4, filling layer 3 and building rubbish layer 2, it is required to explain that filling layer 3 is the slay filling layer, and metalling 4 is the cement metalling.

The two sides, far away from each other, of the two road shoulders 11 are provided with side ditches 12, a transverse drainage channel 7 is arranged between the two side ditches 12, two ends of the transverse drainage channel 7 are communicated with the side ditches 12 respectively, each transverse drainage channel 7 is provided with a plurality of longitudinal drainage channels 6, the lower ends of the longitudinal drainage channels 6 are connected and communicated with the transverse drainage channels 7, the upper ends of the longitudinal drainage channels 6 penetrate through the asphalt layer 5, and the upper ends of the longitudinal drainage channels 6 are flush with the upper surface of the asphalt layer 5; macadam is filled in the longitudinal drainage channel 6 and the transverse drainage channel 7.

As shown in fig. 2, the filling roadbed 1 is provided with expansion joints 10 at intervals along the length direction, the expansion joints 10 are filled with filling materials 13, preferably, the filling materials 13 are polyethylene caulking daub, the filling degree is selected according to the construction season, and the normal temperature construction is flush with the upper surface of the asphalt layer 5.

As shown in fig. 3, the geogrid 8 is provided with a plurality of fixing nails 9, the lower ends of the fixing nails 9 penetrate through the geogrid 8 and are fixedly connected with the soil layer, and the plurality of fixing nails 9 are arranged in a grid shape along the length direction of the geogrid 8.

As shown in fig. 4, three welding points 14 are arranged in the circumferential direction of each fixing nail 9, the fixing nail 9 is welded with the geogrid 8 through the welding points 14, it should be noted that the fixing nail 9 is made of finish-rolled threaded steel bars, and a limiting cap is arranged at the top end of the fixing nail.

Before construction, the utility model completes construction measurement and paying-off work; and cleaning the surface of the foundation, namely cleaning sundries, draining the surface of the ground, and leveling the ground. And rolling before filling to reach the set compactness standard. Firstly, the geogrid 8 is laid on a construction road surface, the fixing nails 9 penetrate into the ground to fix the geogrid 8, and electric welding is carried out for fixing. And laying a construction waste layer, leveling and rolling the construction waste layer 2.

And a filling layer 3 is laid on the upper side of the construction waste layer 2, the roadbed layer 2 is formed by laying slag, the thickness of the roadbed layer is 40cm, and gaps on the surface of the construction waste layer 2 are filled through the slag. And paving a cement gravel layer 4 on the upper side of the slag filling layer 3, and paving an asphalt layer after the cement gravel layer 4 is solidified. A plurality of longitudinal drainage channels 6 are formed in the surface of the roadbed 1 through drilling equipment, and transverse drainage channels 7 communicated with the longitudinal drainage channels 6 are formed in the two ends of the bottom of the roadbed. Rainwater falling to the surface of the roadbed is discharged into the side ditches 12 at two sides through the road shoulders 11 at two sides or the longitudinal drainage channels 6, so that the drainage capacity of the roadbed is improved, the damage to the surface of the roadbed caused by rainwater washing is reduced, and the service life of the roadbed is prolonged.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The roadbed filling structure is characterized by comprising a filler roadbed (1) and geogrids (8) laid on a soil layer, wherein road shoulders (11) are arranged on two sides of each geogrid (8) along the length direction, the filler roadbed (1) is laid on the upper side of each geogrid (8), the filler roadbed (1) is arranged between the two road shoulders (11), and the filler roadbed (1) comprises an asphalt layer (5), a gravel layer (4), a filling layer (3) and a construction waste layer (2) which are sequentially arranged from top to bottom;

two one side that curb (11) kept away from each other all is equipped with side ditch (12), two be equipped with horizontal drainage channel (7) between side ditch (12), the both ends of horizontal drainage channel (7) respectively with side ditch (12) intercommunication, every all be equipped with a plurality of vertical drainage channel (6) on horizontal drainage channel (7), the lower extreme of vertical drainage channel (6) all with horizontal drainage channel (7) are connected and are linked together, the upper end of vertical drainage channel (6) is passed pitch layer (5), just the upper end of vertical drainage channel (6) with pitch layer (5) upper surface parallel and level.

2. A roadbed filling structure according to claim 1, characterized in that the longitudinal drainage channels (6) and the transverse drainage channels (7) are filled with crushed stones.

3. The roadbed filling structure according to any one of claims 1-2, wherein the geogrid (8) is provided with fixing nails (9), and the lower ends of the fixing nails (9) penetrate through the geogrid (8) and are fixedly connected with the soil layer.

4. A roadbed filling structure according to claim 3, wherein the fixing nails (9) are provided in plurality, and the plurality of fixing nails (9) are arranged in a grid shape along the length direction of the geogrid (8).

5. A roadbed filling structure according to claim 4, characterized in that the fixing nails (9) are each provided with a plurality of welding points (14) in the circumferential direction, and the fixing nails (9) are welded with the geogrid (8) through the welding points (14).

6. A roadbed filling structure according to any one of claims 1-2, wherein the filling roadbed (1) is provided with expansion joints (10) at intervals along the length direction, and the expansion joints (10) are filled with joint filler (13).