RU137834U1 - ROAD CONSTRUCTION WITH BULK HEAT INSULATION (OPTIONS) - Google Patents

Abstract

1. A road structure containing a base embankment from mineral soil, road pavement placed on the embankment, and spatial polymer gratings (SPR) laid on the slopes of the embankment, and whose cells are filled with a mixture of peat and crushed stone, while the SPR is fixed on the slopes by anchors and lower ends are placed on the base, characterized in that the SPR are stretched to form diamond-shaped cells and the upper ends are horizontally led into the body of the embankment. 2. The construction according to claim 1, characterized in that the walls of the cells of the SPR are made textured. The construction according to claim 1, characterized in that the walls of the cells of the SPR are perforated. A road structure containing a base embankment made of mineral soil, road pavement placed on the embankment, and PPR blocks laid on the base at the embankment slopes in at least two layers with the formation of retaining walls at least partially located in the body of the embankment and having a trapezoidal cross-sectional shape, while the blocks are fastened together and fixed on the base, the SPR is made of polymer tapes and stretched to form diamond-shaped cells that are filled with a mixture of peat and crushed stone. 5. The road structure according to claim 4, characterized in that the walls of the cells of the SPR are made textured. The road structure according to claim 4, characterized in that the walls of the cells of the PPR made perforated.

Description

Technical field

The proposed utility model relates to the field of construction, namely to road structures, and can be used to strengthen and insulate slopes of soil structures in the form of embankments, in particular, to strengthen and insulate the mowing part of the entire embankment or its base.

When building road structures on weak foundations, it is first of all necessary to ensure high anti-erosion properties of the embankment, i.e. increase the resistance of the embankment (including its slopes) to shear. In addition, the design must have high thermal insulation properties.

State of the art

A known construction of a highway on permafrost soils (see RU 2128267 C1, class ЕСС 3/06, publ. 03/27/1999). The road contains road pavement, a mound of mineral soil and lateral layers of non-woven synthetic material laid on the base, the outer edge of each of which is laid on part of the corresponding slope of the mound. The road is made with rectangular slopes under the sloping trench recesses, with a depth of at least the thickness of the ice ground and a width of at least the thickness of the seasonally thawed soil and equipped with two continuous sheet pile walls that are located in the recesses and each of which is made of a set of containers of equal thickness and filled with mineral soil and with a height equal to the depth of the excavation.

The disadvantage of this is the low operational reliability and insufficiently effective anti-erosion and thermal insulation properties.

The prior art device for strengthening the slope of the soil structure, from RU 34945 U1, cl. E02D 17/20, publ. 12/20/2003. The device contains a geogrid obliquely mounted on the slope of the geogrid, a section located in the horizontal plane adjoining the bottom edge of the geogrid slope, the cells of which are filled with peat-sand mixture, and / or sand, and / or rubble, and in the flooding zone, rubble and / or concrete.

The disadvantage is the low resistance of the embankment (and its slopes) to shears, due to the possible deflection of the geogrid down the slopes.

The prior art also known road structure containing placed on the base of the embankment of mineral soil, pavement, and polymer geogrids laid on the slopes of the embankment, with cells filled with a mixture of peat and gravel. At the same time, geogrids are fixed on the slopes by means of anchors and the lower ends are placed on the base (see RU 57300 U1, E02D 17/20, 10.10.2006) /

The disadvantage of this design is also the low resistance of the embankment to shear.

Utility Model Disclosure

The objective of this utility model is to increase the operational properties of the road structure.

The technical result of the claimed utility model is to increase the anti-erosion properties of the embankment.

An increase in thermal insulation properties can also be achieved.

The indicated technical result of the claimed utility model is achieved in the first embodiment of its implementation due to the fact that the road structure contains a mound of mineral soil placed on the base, pavement placed on the mound, and spatial polymer gratings (hereinafter referred to as PPR) laid on the slopes of the mound, and the cells of which are filled with a mixture of peat and crushed stone, while the SPR are fixed on the slopes by means of anchors and the lower ends are placed on the base, and the SPR are stretched to form diamond-shaped cells and the upper ends tsami horizontally brought into the body of the embankment.

The indicated technical result of the claimed utility model is achieved in the second embodiment of its implementation due to the fact that the road structure contains a mound of mineral soil placed on the base, the pavement placed on the mound, and blocks of PPR laid on the base at the slopes of the mound at least two layers with the formation of retaining walls, at least partially placed in the body of the embankment and having a trapezoidal shape in cross section, while the blocks are fastened together and fixed on the base, They are made of polymer tapes and stretched to form diamond-shaped cells, which are filled with a mixture of peat and crushed stone.

The specified technical result can also be achieved in private forms of the implementation of the first and second variants of the utility model due to the fact that:

- the walls of the cells PPR made textured,

- the walls of the cells PPR made perforated.

Use for strengthening the embankment of stretched SPR with diamond-shaped cells placed on the slopes of the embankment, and the lower end of which is placed on the base, and the upper end is inserted into the body of the embankment (in the first embodiment) or when layers of SPR are stacked in layers to form trapezoidal cross-section the side walls, at least partially located in the body of the embankment (in the second embodiment), can significantly increase the erosion control properties of the embankment in comparison with the known analogues. In addition, thermal insulation properties are improved and permafrost degradation under the sloping parts of the embankment is prevented, which leads to increased stability of the slopes and, in general, to prevent the destruction of the entire embankment.

PPR are not susceptible to cracking, chipping, corrosion and decay, because The polyethylene used to make sheet strips is waterproof and free of free radicals.

The walls of the PPR cells containing aggregate from a mixture of peat with crushed stone form a series of protective bridges that extend along the entire protected slope. The development of jet erosion, which occurs when a concentrated stream crashes into the ground, is prevented, since the stream is continuously redirected to the surface. This mechanism also reduces the flow rate and, accordingly, its erosive effect.

A filler made of a mixture of crushed stone and peat increases the anti-erosion properties, as well as the bearing capacity and thermal insulation properties of the structure.

A layer of plant soil of a certain thickness and a developing root system of plants are protected inside each cell. The roots easily penetrate through the non-woven layer of geotextiles into the underlying soil, thereby creating a unified reinforcement structure over the entire surface of the slope.

In arid regions, SPR cells can improve the development of local vegetation by retaining a significant amount of moisture in the soil near the surface.

List of figures

In FIG. 1 shows a cross section of the proposed design according to the first embodiment of the utility model;

In FIG. 2 shows a cross section of the proposed design according to the second embodiment of the utility model;

In FIG. 3 shows a General view of the SPR.

Utility Model Implementation

The claimed device of the road structure (Fig. 1, 2) contains an embankment 2 made of mineral soil placed on the base 1 (soft soil), pavement 3 placed on the embankment 2, and also a NDP 4 to strengthen the slopes of the embankment 2. The RPM 4 are stretched in one direction with the formation of diamond-shaped cells, which are filled with a mixture of peat and crushed stone.

According to the first embodiment (Fig. 1) of the implementation of the claimed utility model, the PPR 4 are laid on the slopes of the embankment, and are fixed on them by means of anchors. The lower ends of the PPR 4 are placed on the base 1, and the upper ends are horizontally inserted into the body of the embankment 2.

According to the second variant (Fig. 2) of the implementation of the claimed utility model, on the basis of 1 at the slopes of the embankment 2, the NDP 4 blocks are laid in several layers with the formation of retaining walls 5 having a trapezoidal shape in a vertical cross section. Moreover, these walls 5 are at least partially placed in the body of the embankment. Blocks of PPR 4 are bonded to each other and fixed on the base 1.

PPR 4 (geogrids) according to the first and second options include polymer (for example, polyethylene) sheet strips and drainage holes, (see Fig. 3) The polyethylene strips are connected to each other by ultrasonic spot welding or heat sealing, which increases the mechanical strength of HHP.

Preferably, the SPR cells are textured or perforated, which improves the frictional interaction between the cell walls and the soil.

To form the claimed design, first on the prepared base 1 (soft soil) lay mineral soil in the form of a mound 2 to obtain profiled surfaces of the slopes.

According to the first embodiment of the utility model, on the profiled slopes of the embankment 2 lay SPR 4, which stretch to the formation of diamond-shaped cells. The upper end of the PPR 4 is partially buried in the body of embankment 2, and the lower end is laid near the slopes on the base 1. After that, the gratings are fixed on the embankment with anchors.

According to the second embodiment of the utility model, the PPR 4 in the form of blocks is laid from the retaining walls 5, so that in the cross section the shape of the trapezoid is fulfilled, and in the longitudinal section the shape of the polyhedron. Blocks of PPR 4 fasten together with paper clips and, preferably, are fixed on the base 1 and to the embankment 3 with anchors. Then fill the cells of the side layers 1, made in the form of SPR 7 produce a mixture of peat with crushed stone.

Then, according to the first and second options, the SPR cells are filled with a mixture of peat with crushed stone, and pavement 3 is laid on embankment 2 (road surface).

When mounting the claimed design, the choice of the wall height, as well as the size of the cell PPR 4 is carried out taking into account the analysis of the shear and holding forces, the effects of which are exposed to the design.

The most important factors are the steepness of the slope, the intensity of the surface runoff and the angle of repose of the filler material. Large flow cell 4 is usually used in cases where the slope angle is less than 30 ° and when moderate flow rate is predicted. For slopes steeper than 30 ° or slopes exposed to concentrated flow, the use of a standard SPR 4 with a standard cell is required.

The usual depth of the cells for filling with vegetable soil is 75 mm, provided that the root system develops in the slope soil and the slope angle is less than 30 °. For slopes steeper than 30 ° a cell of greater depth is required.

Strengthening the surfaces of the slopes and the roadside strip can also be carried out with the aim of protecting the slopes from the seasonal thawing layer and from the erosion, and the roadside strip from the longitudinal along the track thermoerosion.

As the slope slope increases, the downward component of the dead weight of the reinforcement structure also increases, which may necessitate additional fastening of the structure on the slope.

On steep slopes, filling with plant soil (a mixture of peat with crushed stone) is performed from top to bottom.

In FIG. 1, 2 also shows the position of the upper groundwater with the application of the proposed design (pos. 6) and without its use (pos. 7).

NDP 4 used in the proposed design can be operated at temperatures from -65 ° C to + 50 ° C when exposed to ultraviolet radiation, in contact with water, concrete, soil with an acidity index of pH = 4-11.

The ability of the specified PPR 4 to hold loose material in the cells allows you to use it on very steep slopes.

Thus, the proposed utility model provides an increase in the stability of slopes to shear and the entire embankment as a whole, an increase in erosion-protective properties, and also an improvement in thermal insulation properties.

Claims (6)

1. A road structure containing a base embankment from mineral soil, road pavement placed on the embankment, and spatial polymer gratings (SPR) laid on the slopes of the embankment, and whose cells are filled with a mixture of peat and crushed stone, while the SPR is fixed on the slopes by anchors and lower ends are placed on the base, characterized in that the SPRs are stretched to form diamond-shaped cells and the upper ends are horizontally inserted into the body of the embankment. 2. The design according to claim 1, characterized in that the walls of the cells of the SPR are made textured. 3. The design according to claim 1, characterized in that the walls of the cells PPR made perforated. 4. A road structure comprising an embankment of mineral soil placed on the base, road pavement placed on the embankment, and blocks of PPR, laid on the base at the slopes of the embankment in at least two layers with the formation of retaining walls at least partially placed in the body of the embankment and having a trapezoidal shape in cross section, while the blocks are fastened together and fixed on the base, the SPR is made of polymer tapes and stretched to form diamond-shaped cells that are filled with a mixture of peat and crushed stone. 5. The road structure according to claim 4, characterized in that the walls of the cells of the PPR are made textured. 6. The road structure according to claim 4, characterized in that the walls of the cells of the PPR made perforated.

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