CN110284385B

CN110284385B - Anti-freeze soil road

Info

Publication number: CN110284385B
Application number: CN201910584379.8A
Authority: CN
Inventors: 黄显彬; 刘晨阳; 梅玉娇; 赵伟
Original assignee: Sichuan Agricultural University
Current assignee: Sichuan Agricultural University
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2021-12-07
Anticipated expiration: 2039-07-01
Also published as: CN110284385A

Abstract

The invention provides a frost-resistant soil highway, wherein water-resisting layers are respectively arranged on two sides of a roadbed below a freezing line, the roadbed is made of foam lightweight concrete and extends from the upper part of a ground line to the lower part of the freezing line, and further, protective layers are respectively arranged on two sides of the roadbed between the ground line and the freezing line. The anti-freezing soil highway provided by the invention tries to cut off one of the essential elements, namely water, and prevents water from entering the roadbed from the two sides and the bottom of the roadbed through the protective layer and the water-resisting layer, so that the roadbed is prevented from freezing and thawing. The novel roadbed filler foamed lightweight concrete is combined with the waterproof layer and the protective layer, so that the roadbed works in a waterless environment, the freeze-thaw damage of the roadbed is ingeniously solved, and the roadbed filler foamed lightweight concrete is particularly suitable for being located in seasonal frozen soil areas or perennial frozen soil areas.

Description

Anti-freeze soil road

Technical Field

The invention belongs to the technical field of frost-resistant roads, and particularly relates to a frost-resistant road.

Background

The frozen soil is widely distributed in China, and the region from Helan mountain to Fuli mountain is a wide region in the west, and the region from this line to the east, and the region from the Qinling mountain to Huaihe river is a seasonal frozen soil region, which is about 55% of the national soil area in China. According to statistics, about 75% of traffic routes in China are located in seasonal frozen soil areas, after roads in the seasonal frozen soil areas are constructed and operated, the seasonal frozen soil is repeatedly frozen and melted along with the alternate change of climate, so that the strength of road beds of the roads is seriously influenced, for the perennial frozen soil areas, the perennial frozen soil under the road beds is gradually changed into the seasonal frozen soil with higher water content under the influence of heat absorption of materials such as asphalt and the like, under the condition, the road beds are very easy to frost heaving, two main elements for generating the frost heaving of the road beds are water and temperature, the road beds can be frozen heaving under the water environment and at the proper low temperature, the road beds are melted under the proper temperature, and the frost heaving is common diseases of the road beds. In addition, the traditional roadbed filling material has heavy self weight and large foundation stress, the roadbed is easy to settle, and soil around the roadbed below a freezing line can generate frost heaving pressure to extrude and damage the roadbed. In summary, the most common and serious diseases of roads in frozen soil areas are frost heaving and settlement.

Disclosure of Invention

Based on the above problems, it is an object of the present invention to provide a frost-resistant road having advantages of frost heaving resistance and settlement resistance.

In order to achieve the above purpose, the invention adopts the technical scheme that: the utility model provides a freeze proof soil highway, includes the road bed and sets up in the road surface on road bed upper portion, the both sides that the road bed is located under the frost line set up the water barrier respectively.

According to the anti-freeze soil highway provided by the invention, the water-resisting layers are arranged on the two sides of the roadbed below the freezing line, so that water in a soil layer below the freezing line is prevented from entering a roadbed structure layer, and the roadbed is prevented from being turned into slurry and frozen and thawed.

Specifically, the roadbed is made of foam lightweight concrete and extends from the ground line to the freezing line from the upper part. The foamed light concrete is a roadbed obtained by taking cement, admixture and the like as cementing materials, adding fibers, additives and water to prepare slurry, mixing and stirring the slurry with fine stable bubble groups prepared by foaming equipment to form foamed light concrete slurry, and curing the foamed light concrete slurry serving as a filler, wherein the foamed light concrete slurry contains a large amount of closed and unconnected bubbles, and has light weight and better heat preservation and insulation performance and compression resistance compared with common concrete and common filling; the foam lightweight concrete is used as the roadbed filling, which can reduce the effective dead weight of the roadbed, reduce the foundation stress, reduce the foundation settlement difference and reduce the damage caused by frost heaving pressure, and the internal porosity of the foam lightweight concrete is high, but the pores are not communicated with each other, generally no pressure water exists, water is difficult to permeate into the pores, no moisture exists in the pores, therefore, the roadbed can prevent external water from entering, natural conditions are provided for preventing the roadbed from turning slurry and frost heaving, particularly, the foam light concrete roadbed is deepened to a certain depth below a freezing line, the influence of frost heaving pressure of surrounding soil bodies is avoided from the top surface to the bottom surface, the roadbed is prevented from naturally freezing and thawing in the vertical depth direction, and a water-resisting layer is matched, both to enhance the water resistance and frost heave resistance of the road bed, said bed preferably extending down to about 1 meter below the frost line.

Specifically, the water-resisting layer is a clay layer.

Optimally, two sides of the roadbed between the ground line and the freezing line are respectively provided with a protective layer, frost heaving pressure generated by frost heaving of surrounding soil bodies is slowed down or digested through the protective layers, the frost heaving pressure is prevented from being transmitted to the roadbed from the transverse direction of the highway, namely the width direction of the roadbed, natural ground water can be prevented from permeating into the roadbed, and the protective layers are combined with a water-resisting layer, so that water in upper and lower soil layers of the freezing line is prevented from entering the roadbed; furthermore, a foam layer is arranged between the protective layer and the side part of the roadbed, and the foam layer provides an elastic space for preventing the roadbed from frost heaving pressure of surrounding soil bodies, so that the frost heaving pressure is further buffered, and frost heaving damage is reduced; the foam layer is a foam plastic layer, and specifically can adopt a polyurethane foam plastic layer; specifically, the protective layer may be a hard protective layer obtained by combining and lining a steel bar net rack and concrete, or a plastic or rubber soft protective layer.

Optimally, reinforcing layers are respectively arranged on two sides of the roadbed above the ground line, and the roadbed is protected and reinforced through the reinforcing layers to prevent the roadbed from deforming; furthermore, the reinforcing layer comprises a panel arranged on the side part of the roadbed and angle steel which is embedded in the roadbed and is close to the edge of the side part of the roadbed, and the panel is connected with the angle steel through a steel bar pull rod; furthermore, a slope waterproof stop block is arranged at the joint of the lower part of the outer side of the panel and the ground line; preferably, the panel is made of concrete plates and high-strength plastic plates, and the slope waterproof stop block is made of concrete.

The invention has the beneficial effects that:

(1) according to the anti-freeze soil highway provided by the invention, the water-resisting layers are arranged on two sides of the roadbed below the freezing line, so that water in upper and lower soil layers of the freezing line is prevented from entering a roadbed structure layer, and the roadbed is prevented from being turned over.

(2) The anti-frost highway further adopts the foam lightweight concrete to integrally pour to obtain the roadbed extending from the position above the ground line to the position below the frost line, and the roadbed made of the foam lightweight concrete has the advantages of light weight, difficult settlement, strong water resistance and strong frost heaving resistance.

Drawings

FIG. 1 is a schematic view of a soil freeze resistant road provided by the present invention;

wherein, 1 is the road bed, 2 is the marine barrier, 3 is the inoxidizing coating, 4 is the foam blanket, 5 is the panel, 6 is the angle steel, 7 is the reinforcing bar pull rod, 8 is the waterproof dog of slope, 9 is the ground line, 10 is the freeze line.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Examples

As shown in fig. 1, the present embodiment provides a freeze-proof road, which includes a roadbed 1 and a pavement arranged on the upper portion of the roadbed 1, wherein the roadbed 1 is made of foam lightweight concrete and extends from above the ground line to below an ice line 10; two sides of the roadbed 1 below the freezing line 10 are respectively provided with a water-resisting layer 2, and the water-resisting layers 2 are obtained by tamping clay; two sides of the roadbed 1, which are positioned between the ground line and the freezing line 10, are respectively provided with a protective layer 3, a foam layer 4 is arranged between the protective layer 3 and the side part of the roadbed 1, and the foam layer 4 is made of polyurethane foam plastics; reinforcing layers are respectively arranged on two sides of the roadbed 1 above the ground line, each reinforcing layer comprises a high-strength plastic panel 5 arranged on the side part of the roadbed 1 and angle steel 6 embedded in the roadbed 1 and close to the edge of the side part of the roadbed 1, and the panels 5 are connected with the angle steel 6 through steel bar pull rods 7; a slope waterproof stop block 8 is arranged at the joint of the lower part of the outer side of the panel 5 and the ground line.

The anti-freeze soil highway provided by the invention adopts the foam lightweight concrete to integrally pour to obtain the roadbed 1 extending from the upper part of the ground line to the lower part of the freeze line 10, has the advantages of light weight, strong water resistance and frost heaving resistance, and blocks water from the bottom and two sides of the roadbed to enter the roadbed 1 through the waterproof layer 2 and the protective layer 3, so that the freeze thawing of the roadbed 1 is avoided, the frost heaving pressure generated by the surrounding soil body due to frost heaving can be relieved or digested through the protective layer 3, and the frost heaving pressure is prevented from being transmitted to the roadbed 1; a layer of elastic space is arranged for preventing the roadbed 1 from being frozen and swollen by surrounding soil bodies through the foam layer 4, so that frozen and swollen hazards are further reduced; the roadbed 1 is protected and reinforced through the reinforcing layer, so that the roadbed 1 is prevented from deforming; in conclusion, the anti-frost soil highway provided by the embodiment has the advantages of anti-slurry turnover, anti-sedimentation, anti-freeze thawing and anti-frost heaving.

The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Variations and modifications in other variations will occur to those skilled in the art upon reading the foregoing description. Not all embodiments are exhaustive. All obvious changes and modifications of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a frost resisting soil highway, includes the road bed and sets up in the road surface on road bed upper portion, its characterized in that, the road bed is foam lightweight concrete material and extends to under the frozen line on by the ground line, the both sides that the road bed is located under the frozen line set up the water barrier respectively, the both sides that the road bed is located between ground line and the frozen line set up the inoxidizing coating respectively, the inoxidizing coating is the hard inoxidizing coating that obtains by steel bar net rack and concrete composite lining, perhaps the inoxidizing coating is the soft inoxidizing coating of rubber matter.

2. The soil blast resistant highway according to claim 1, wherein said water barrier is a clay layer.

3. The soil blast resistant pavement of claim 1, wherein a foam layer is disposed between said protective layer and a side of the subgrade.

4. The frost-resistant road according to any of claims 1 to 3, wherein the roadbed is provided with reinforcing layers on both sides above the ground line.

5. The frost-resistant highway according to claim 4, wherein the reinforcing layer comprises a panel arranged on the side of the roadbed and angle steel embedded in the roadbed and close to the edge of the side of the roadbed, and the panel is connected with the angle steel through a steel bar pull rod.

6. The frost-resistant road as claimed in claim 5, wherein a slope waterproof block is provided at the junction of the lower part of the outer side of the panel and the ground line.