CN213267356U - Roadbed built above high-water-content silt - Google Patents

Abstract

The invention relates to the technical field of municipal engineering, in particular to a roadbed built above high-water-content silt, which is characterized by comprising a coal gangue mixture layer, wherein the coal gangue mixture layer is piled up in a slope shape and tamped above a current soil layer; the middle reinforcing layers are paved and fixed in the coal gangue material mixing layer; the first geotextile layer is laid on slopes on two sides of the coal gangue mixing layer; a planting soil layer, wherein the planting soil layer is stacked on the slope and two sides of the coal gangue material mixing layer; and the top pressure-resistant layer is paved and tamped at the top of the coal gangue material mixing layer. The gangue mixing layer is processed by using a dynamic compactor, so that higher filling compactness can be obtained, and the gangue mixing roadbed has higher bearing capacity and sufficient stability; the middle reinforcing layer can be used for improving the overall performance of the roadbed and improving the fatigue cracking resistance, low-temperature shrinkage cracking resistance and other performances of the roadbed; green plants can be planted on the planting soil layers filled on the two sides, the roadbed can be stabilized, and the appearance is more attractive.

Description

Roadbed built above high-water-content silt

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of municipal engineering, in particular to a roadbed constructed above high-water-content silt.

[ background of the invention ]

The roadbed is a foundation of a track or a road surface and is an earth structure formed by excavation or filling. The roadbed mainly has the functions of providing necessary conditions for track or road surface laying and train or traveling operation, bearing static load and dynamic load of track and locomotive vehicle or road surface and traffic load, and transmitting and diffusing the load to the deep part of the foundation. In civil engineering, the subgrade occupies an important position in the aspects of construction quantity, floor area and investment.

When a highway is constructed in a region with more rainwater in the south or on a roadbed filled in zones such as the coastal zone, the lake zone, the coastal zone and the like, because nearby water permeates into the foundation of the filling zone and the difference of the properties of soil bodies of the filling zone and the boundary surface, the filling roadbed is easy to generate the phenomena of roadbed instability, sinking, slump and even cracking and the like, and the safety and the service life of the road are seriously threatened.

The utility model discloses a utility model patent with publication number CN208803316U, which discloses a shallow water level highway waterproof roadbed, which is characterized by comprising an upper roadbed, a lower roadbed, a waterproof layer, a compacted embankment and a compacted original soil layer, wherein the upper roadbed, the lower roadbed, a geotextile waterproof layer, the compacted embankment and the compacted original soil layer are sequentially laid from top to bottom; the waterproof layer includes the plane waterproof layer of upper strata and the U type waterproof layer of lower floor, the plane waterproof layer is laid between bed of going up the way and the bed of leaving the way, the U type waterproof layer is laid the bed bottom of leaving the way, the U type lateral wall of U type waterproof layer with the overlap joint of plane waterproof layer both ends will the bed of leaving the way seals the parcel. Although the roadbed adopting the technical scheme has certain waterproof capacity, the phenomena of collapse and sliding and cracking are easily generated.

Utility model patent that publication number is CN207525557U discloses a steep slope weak soil road bed, locates steep slope side and top surface, its characterized in that, steep slope side main part cross section be right trapezoid, include in proper order by going up: a water-resisting layer, a horizontal water seepage soil layer, a foundation bed lower embankment and a foundation bed bottom layer; a plurality of transverse geotechnical reinforcing ribs are arranged in the lower embankment of the foundation bed and the bottom layer of the foundation bed, and the inner ends of the geotechnical reinforcing ribs are connected with anchor rods embedded into the steep slope; paving a foundation bed surface layer on the top surfaces of the steep slope and the foundation bed bottom layer; a vertical water seepage soil layer communicated with the horizontal water seepage soil layer is arranged on the side vertical surface of the steep slope; a horizontal drainage pipe is arranged in a horizontal seepage soil layer on the water-resisting layer, and the outer end of the horizontal drainage pipe extends out of the roadbed; a plurality of foundation reinforcing piles are arranged below the waterproof layer. The roadbed of this scheme although have stronger wholeness, be difficult to the fracture, nevertheless prevent slump and smooth effect poor, the roadbed surface is dull, lacks the afforestation.

[ summary of the invention ]

In order to solve the technical problem, the invention provides a roadbed built above silt with high water content.

In order to achieve the purpose, the invention provides the following technical scheme: a roadbed built above high-water-content silt comprises a coal gangue mixture layer, wherein the coal gangue mixture layer is piled up in a slope shape and tamped above a current soil layer; the middle reinforcing layers are paved and fixed in the coal gangue material mixing layer and are arranged at intervals with the coal gangue material mixing layer; the first geotextile layer is laid on slopes on two sides of the coal gangue mixing layer; the planting soil layer is stacked on the slope of the coal gangue material mixing layer and on two sides of the slope; and the top pressure-resistant layer is paved and tamped on the top of the coal gangue material mixing layer.

Preferably, the coal gangue mixture layer is prepared by fully mixing coal gangue and plain soil.

Preferably, the slopes of the slopes on the two sides of the coal gangue mixing layer are 30-45 degrees.

Preferably, the middle reinforcing layer consists of a glass fiber geogrid and a second geotextile layer laid below the glass fiber geogrid, wherein the glass fiber geogrid is a bidirectional geogrid, the size of the grid is 12x12mm, and the width of the grid is 2 m.

Preferably, the middle reinforcing layer comprises a bamboo net sheet and a second geotextile layer laid below the bamboo net sheet, and the lap joint length between two adjacent rows of bamboo sheets on the bamboo net sheet is 100mm and the bamboo net sheet is fixed through stainless steel nails.

Preferably, the coal gangue material mixing layer is arranged on the middle reinforcing layer, and the coal gangue material mixing layer is arranged on the middle upper portion of the coal gangue material mixing layer.

Preferably, a hemispherical base is detachably mounted at the bottom end of the fixing column, and the bottom surface of the hemispherical base is in a corrugated shape with concave and convex undulations.

Preferably, a plurality of horizontally arranged baffles can be detachably mounted on the fixed column from top to bottom.

Preferably, the top pressure-resistant layer sequentially comprises a rubble layer, a concrete layer, a cement mortar layer and a high lake stone layer from bottom to top.

The invention has the beneficial effects that: the coal gangue mixing layer prepared by fully mixing the coal gangue and the plain soil is treated by using the dynamic compaction, so that higher filling compaction can be obtained, and the coal gangue mixing roadbed has higher bearing capacity and sufficient stability; the integrity of the mixed material of the coal gangue can be enhanced to a certain degree by mixing and stirring the coal gangue and the plain soil; the arrangement of the middle reinforcing layer and the fixing columns can be used for improving the overall performance of the roadbed and improving the fatigue cracking resistance, high-temperature rutting resistance, low-temperature shrinkage cracking resistance and the like of the roadbed; the arrangement of the first geotextile layer can play a certain anti-scouring role on steep slopes on two sides of the roadbed; green plants can be planted on the planting soil layers filled on the two sides, so that the roadbed can be stabilized, and the roadbed is more attractive.

[ description of the drawings ]

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic structural diagram of an intermediate reinforcing layer according to an embodiment.

FIG. 3 is a schematic structural view of an intermediate reinforcing layer according to a second embodiment.

Description of the labeling: 1-coal gangue mixture layer, 2-middle reinforcing layer, 21-glass fiber geogrid, 22-bamboo net piece, 23-second geotechnical cloth layer, 3-current soil layer, 4-top pressure-resistant layer, 5-first geotechnical cloth layer, 6-planting soil layer, 7-fixing column, 71-hemispherical base and 72-baffle.

[ detailed description ] embodiments

The present invention will be described in further detail below with reference to specific embodiments and drawings, but the present invention is not limited to the specific embodiments below.

The following examples are not provided to limit the scope of the present invention, nor are the steps described to limit the order of execution, and the directions described are limited to the drawings. Modifications of the invention which are obvious to those skilled in the art in view of the prior art are also within the scope of the invention as claimed.

Example 1

A roadbed built above high-water-content silt, as shown in figures 1 and 2, comprises a coal gangue mixture layer 1 prepared by fully mixing coal gangue and plain soil, wherein the coal gangue and the plain soil are easy to obtain materials, a large amount of waste coal gangue can be locally obtained and utilized, the roadbed bearing capacity required by design and investigation is met, and the actual construction requirement is also met, the coal gangue mixture layer 1 is piled and tamped in a slope shape above a current soil layer 3 with high water content, slopes on two sides of the coal gangue mixture layer 1 are 30-45 degrees, the slopes have stronger scouring resistance, first geotextile layers 5 are paved on the slopes on two sides of the coal gangue mixture layer 1, and the specification of the first geotextile layers 5 is 200g/m²So as to enhance the water resistance and the scouring resistance of the coal gangue mixture layer 1; the first geotechnical cloth layer 5 on the slope of coal gangue mixture layer 1 both sides and slope both sides all have the pile to cover and have planting soil layer 6, and the green planting of accessible planting is beautified the environment and is played the reinforcing action to planting soil layer 6 simultaneously on planting soil layer 6. The different degree of depth department of gangue mixture layer 1 all lays and is fixed with middle back up coat 2, and the interval of laying of upper and lower double-phase adjacent middle back up coat 2 in the vertical direction is unequal at 500mm ~ 700mm, and middle back up coat 2 comprises glass fiber geogrid 21 and second geotechnological cloth layer 23, and the below of glass fiber geogrid 21 is laid to second geotechnological cloth layer 23, can play the reinforcement to gangue mixture layer 1, protection and anti-filter effect, glass fiber geogrid 21 is two-way grid, and the net size is 12x12mm, and the broad width is 2m, can play firm effect to gangue mixture layer 1 to strengthen its wholeness, and then prevent road bed fracture phenomenon. A top pressure-resistant layer 4 is laid and tamped at the top of the coal gangue mixture layer 4 so as to facilitate better driving of a vehicle; the top pressure-resistant layer 4 sequentially comprises a rubble layer, a concrete layer, a cement mortar layer and a high lake stone layer from bottom to top.

In this embodiment, still include a plurality of fixed columns 7, fixed column 7 is vertical to pass and the bottom of fixed column 7 is fixed to current situation soil layer 3 in the middle reinforcement layer 2, and the top of fixed column 7 is located the well upper portion of gangue mixture layer 1, and the bottom demountable installation of fixed column 7 has hemispherical base 71, and hemispherical base 71's bottom surface is the corrugate of unsmooth undulation, and from the top down still demountable installation has the baffle 72 of a plurality of levels setting on the fixed column 7. The arrangement of the fixing columns 7 can further enable the coal gangue material mixing layer 1 to form a whole, and cracking is not easy to occur. The hemispherical bases 71 at the bottoms of the fixing columns 7 can increase the contact area with the current soil layer 3, reduce the pressure on the current soil layer 3 and prevent the fixing rods 7 from sinking, and the horizontal baffles 72 can further prevent the fixing columns 7 from sinking; the top of the fixing column 7 is positioned at the middle upper part of the coal gangue mixture layer 1 instead of the top end, so that adverse effects on the road surface above the coal gangue mixture layer 1 can be avoided.

Example 2

The present embodiment is substantially the same as embodiment 1, except that, as shown in fig. 3, in the present embodiment, the middle reinforcing layer 2 includes a bamboo mesh 22 and a second geotextile layer 23 laid below the bamboo mesh 22, the lap joint length between two adjacent rows of bamboo chips on the bamboo mesh 22 is 100mm, and the bamboo mesh 22 and the second geotextile layer 23 are fixed by stainless steel nails, so that the integrity and stability of the coal gangue mixture layer 1 are enhanced, and the reinforcing, protecting and reverse filtering effects on the coal gangue mixture layer 1 are achieved.

Claims (8)

1. A roadbed built above silt with high water content is characterized by comprising

The coal gangue material mixing layer (1) is piled up in a slope shape and tamped above the current soil layer (3);

the middle reinforcing layers (2) are paved and fixed in the coal gangue mixture layer (1) and are arranged at intervals with the coal gangue mixture layer (1);

the first geotextile layer (5) is laid on slopes on two sides of the coal gangue mixture layer (1);

the planting soil layer (6) is stacked on the slope of the coal gangue mixture layer (1) and on two sides of the slope;

the top pressure-resistant layer (4) is paved and tamped on the top of the coal gangue material mixing layer (1).

2. The roadbed built above high-water-content silt according to claim 1, wherein slopes on two sides of the coal gangue mixture layer (1) are 30-45 degrees in gradient.

3. A foundation to be built above fine earth with high water content according to claim 1, wherein said intermediate reinforcing layer (2) is composed of fiberglass geogrid (21), said fiberglass geogrid (21) is a bidirectional grid, the grid size is 12x12mm, and the width is 2 m.

4. A foundation built above silt with high water content according to claim 1, wherein said intermediate reinforcing layer (2) comprises a bamboo mesh sheet (22) and a second geotextile layer (23) laid under said bamboo mesh sheet (22).

5. A roadbed built above high-moisture content silt according to claim 1, 3 or 4, characterized by further comprising a plurality of fixing columns (7), wherein the fixing columns (7) vertically penetrate through the middle reinforcing layer (2) and are fixed into the existing soil layer (3) at the bottom ends, and the top ends of the fixing columns (7) are positioned at the middle upper part of the coal gangue mixture layer (1).

6. A roadbed built above silt with high water content, according to claim 5, characterized in that a hemispherical base (71) is detachably mounted on the bottom end of the fixing column (7), and the bottom surface of the hemispherical base (71) is in a corrugated shape with concave and convex undulations.

7. A foundation built above silt with high water content according to claim 6, wherein a plurality of horizontally arranged baffles (72) are also detachably installed on the fixing column (7) from top to bottom.

8. The roadbed built above the high-water-content silt according to claim 1, wherein the top pressure-resistant layer (4) comprises a gravel layer, a concrete layer, a cement mortar layer, an emulsified asphalt permeable layer and a modified asphalt layer from bottom to top in sequence.

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