Method for forming pavement of highway resisting large deformation of ground

A molding method and large deformation technology, applied in the direction of roads, roads, pavement details, etc., can solve the problems of occupying a lot of arable land, low resistance to deformation, affecting the normal use of roads, etc. Operational effect

Inactive Publication Date: 2007-07-25
CHINA UNIV OF MINING & TECH
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Problems solved by technology

When the underground mining area reaches a certain range, the movement starting near the stope will expand to the surface, forming a surface deformation zone, and this deformation will directly affect the ground road, causing additional stress and displacement, seriously affecting The normal use of the road, but the current design of the road surface is only designed according to the small deformation specification, its ability to resist deformation is small, and when the surface has large uneven deformation, the existing road cannot meet the requirements of normal use
For such problems, at present, solutions such as road diversion or repeated maintenance are generally adopted, which may cause problems such as occupying a lot of cultivated land, cumbersome procedures, long construction period, and high cost.

Method used

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  • Method for forming pavement of highway resisting large deformation of ground
  • Method for forming pavement of highway resisting large deformation of ground

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Embodiment Construction

[0014] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0015] Fig. 1 is the road surface cross-sectional structural schematic diagram of the large surface deformation-resistant highway pavement molding method. In order to provide the anti-deformation ability of the road surface, a layer of tensile geotechnical material 1 is first laid on the full section of the top layer of the subgrade 8, and the tensile material can be geogrid. Or geotextile, as shown in Figure 2(a). Reserve a side width 2 of 20 cm to 30 cm on both sides of the subgrade 8 on the geotechnical material 1, wrap the side width 2 with lime soil or lime soil for wrapping, and pave a 10 cm to 15 cm gravel cushion 3, as shown in Figure 2(b ) shown in ); then integrally pave one deck of lime-flyash soil layer 4, fill rubber material according to the size shear deformation joint 7 of the fly-ash upper plate, as shown in Fig. 2 (c); Fly ash soil layer ...

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Abstract

The present invention relates to a highway road surface forming method capable of resisting ground surface large-deformation. Said method includes the following steps: firstly, laying a layer tension-resisting geotechnical material on the top layer of roadbed, making edge-covering treatment of roadbed two sides whose width range is 30-50 cm on the geotechnical material, then laying broken stone hardcore whose thickness is 10 cm-15 cm on the geotechnical material, according to different non-uniform settlements respectively further laying road surface base layer and surface layer with different sizes, and between the road surface structure plate blocks of every layer filling flexible material with different widths.

Description

technical field [0001] The invention relates to a pavement forming method for an anti-large surface deformation highway, and is especially suitable for preventing and controlling new roads with large surface deformation in uneven subsidence areas. Background technique [0002] In order to meet the social and economic development, people have increased the development and utilization of underground resources, and resources such as coal, oil, natural gas, and groundwater have been continuously extracted from the ground, which will inevitably destroy the underground rock mass. The original stress balance state causes the stress redistribution in the rock and soil body, and the rock stratum moves, deforms and destroys. When the underground mining area reaches a certain range, the movement starting near the stope will expand to the surface, forming a surface deformation zone, and this deformation will directly affect the ground road, causing additional stress and displacement, se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/32E01C11/02
Inventor 于广云李宏波
Owner CHINA UNIV OF MINING & TECH
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