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Subgrade drainage structure and system and construction method

A drainage structure and drainage system technology, which is applied in the direction of infrastructure engineering, roads, roads, etc., can solve the problems that the roadbed performance cannot meet the demand, reduce the service life of the roadbed and pavement structure, the bearing capacity of the roadbed and the decline of deformation resistance, etc., to achieve Avoid slope soil loss, improve service performance and life, and improve the effect of absorption

Active Publication Date: 2020-01-03
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor found that with the continuous increase of traffic volume and vehicle load, the requirements for the roadbed, especially the long-term service performance, are getting higher and higher. When the optimal state increases to the equilibrium humidity state, the moisture content increases by 4%-8%, which leads to the decline of the bearing capacity and deformation resistance of the roadbed. It is difficult to adjust the internal humidity during the maintenance process of the roadbed, which leads to the unsatisfactory internal performance of the roadbed. demand, reducing the service life of roadbed and pavement structures

Method used

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  • Subgrade drainage structure and system and construction method
  • Subgrade drainage structure and system and construction method
  • Subgrade drainage structure and system and construction method

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Effect test

Embodiment 1

[0049] In a typical implementation of the present application, such as Figure 1-Figure 2 As shown, a subgrade drainage structure using hollow geomembrane is proposed.

[0050] combine figure 1 As shown, the drainage structure includes an absorption film 1 and a drainage pipe 2 composed of a hollow pipe 1-1, both ends of the hollow pipe are connected to the drainage pipe, and the wall of the hollow pipe is provided with dense micron-sized The opening of the hole diameter, so that after being buried in the roadbed, the micron-sized openings reduce the diameter of the capillary formed in the roadbed, thereby obtaining a capillary with a smaller diameter and increasing the suction of the capillary. The water in the soil around the membrane is sucked into the hollow tube, and the absorbed water is discharged out of the roadbed through the drainage pipes at both ends, which reduces the moisture content in the roadbed soil and improves the humidity inside the roadbed to maintain a ...

Embodiment 2

[0059] In a typical embodiment of the present application, a construction method utilizing the roadbed drainage structure of Embodiment 1 is provided, comprising the following steps:

[0060] Reinforce the foundation part of the subgrade drainage structure to be paved and level the surface;

[0061] Lay the above-mentioned absorbing film on the top of the foundation along the direction of the road extension, and check whether the moisture in the absorbing film can be successfully discharged from both ends of the hollow pipe;

[0062] After successfully paving the bottom absorbing membrane, continue to lay the soil layer by layer according to the roadbed parameters, and arrange the roadbed drainage structure between adjacent layers until it reaches the surface of the roadbed.

[0063] Further, when arranging the roadbed, a drainage ditch is arranged at the interface between the roadbed and the foundation, and after laying the absorbent film, it is checked whether the moisture i...

Embodiment 3

[0068] In another typical embodiment of the present application, a roadbed drainage system including the roadbed drainage structure described in Embodiment 1 is provided.

[0069] At present, the electroosmotic drainage method has been widely used in soft soil consolidation, sludge dewatering, and contaminated soil restoration. The electroosmotic drainage method is mostly used in saturated soils. However, due to the climate and soil quality of our country, most of the highway subgrades are unsaturated soil subgrades. Therefore, this application is aimed at the above problems. The method is applied to the unsaturated soil subgrade, which plays a role in reducing the moisture content and increasing the bearing capacity.

[0070] Specifically, it includes a roadbed drainage structure, a power supply 5-4, and an electrode structure 5. The electrode structure includes a positive electrode structure 6 and a negative electrode structure 7. The positive electrode structure and the neg...

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Abstract

The invention discloses a subgrade drainage structure and system and a construction method. The subgrade drainage structure comprises absorbing films; the absorbing films are used for being placed ina soil body of a subgrade; the absorbing films comprise multiple hollow pipes whose axes are parallel; multiple through holes are formed in the walls of the hollow pipes; the through holes in contactwith the soil body of the subgrade are used for reducing the diameters of capillary tubes in the soil body of the subgrade so that water in the soil body, around the absorbing films, of the subgrade is absorbed into the hollow pipes through the through holes; the two ends of the hollow pipes are used for draining water in the hollow pipes; the absorbing films are placed at the intersections of different layers of the subgrade; and through the micro-sized through holes formed in the hollow pipes, the internal diameters of the capillary tubes in the soil body of the subgrade are effectively reduced so that the water is concentrated in the hollow pipes to be drained out from the two ends of the hollow pipes; and therefore, the water content in the soil body of the subgrade is effectively reduced.

Description

technical field [0001] This application relates to the field of road engineering, specifically a roadbed drainage structure, system and construction method. Background technique [0002] After the road is paved and opened to traffic, the roadbed and its ancillary equipment are in a solid and stable state. As the road usage time increases, the internal state of the roadbed will also change. These changes will directly affect the later road driving and maintenance of the roadbed. . [0003] The inventor found that with the continuous increase of traffic volume and vehicle load, the requirements for the roadbed, especially the long-term service performance, are getting higher and higher. When the optimal state increases to the equilibrium humidity state, the moisture content increases by 4%-8%, which leads to the decline of the bearing capacity and deformation resistance of the roadbed. It is difficult to adjust the internal humidity during the maintenance process of the roadb...

Claims

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Application Information

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IPC IPC(8): E01C3/04E02D3/10E02D3/11
CPCE01C3/04E02D3/10E02D3/103E02D3/11E02D2200/17
Inventor 蒋红光姚占勇包佳佳黄贝贝杨晨君张吉哲梁明
Owner SHANDONG UNIV
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