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Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure

A drainage structure and composite geotechnical technology, applied in the direction of infrastructure engineering, construction, etc., can solve the problems that cannot be completely effectively solved, there is no mature unsaturated seepage drainage technology method, etc., to increase soil layer isolation, improve durability, prevent The effect of rising capillary water

Inactive Publication Date: 2013-01-02
CHINA RAILWAY 21TH BUREAU GROUP
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Traditional drainage techniques are only suitable for saturated seepage conditions, however, the movement of water near the surface is unsaturated seepage
Therefore, the traditional drainage technology cannot fully and effectively solve the engineering problems related to unsaturated seepage
[0003] At present, there is no mature technical method suitable for unsaturated seepage drainage

Method used

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  • Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure
  • Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure
  • Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure

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Embodiment Construction

[0017] Such as figure 1 Shown: the composite geotechnical material capillary barrier drainage structure provided by the present invention is made up of three layers; From top to bottom, it is the transmission layer 1, the capillary barrier layer 2 and the isolation layer 3; the transmission layer 1 and the isolation layer 3 are non- The geotextile is woven, and the capillary barrier layer 2 is a geonet.

[0018] The non-woven geotextile of the transmission layer 1 is a filament needle-punched geotextile with a grammage of 200-300 g / m 2 ; The non-woven geotextile of the isolation layer 3 is a filament needle-punched geotextile, and its grammage is 400-500 g / m 2 .

[0019] Such as figure 2 Shown: the unsaturated compacted loess embankment structure provided by the present invention comprises a foundation 4, a roadbed 6 and a bed 7, and a composite geotechnical material capillary barrier drainage structure 5 is arranged between the foundation 4 and the roadbed 6; the foundati...

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Abstract

The invention discloses a composite geotextile material capillary barrier draining structure and an unsaturated loess embankment structure. The composite geotextile material capillary barrier draining structure comprises three layers, namely a transport layer, a capillary barrier layer and an isolation layer; the transport layer and the isolation layer are made of nonwoven geotextile of different specifications, and the capillary barrier layer is a geonet; the capillary barrier layer prevents leakage flow in the soil body of a base layer above the capillary barrier layer from entering the soil body of a foundation below, water gathered in the transport layer drains along a slope, and the isolation layer is mainly used for preventing the soil body below the barrier layer from entering the pores of the capillary barrier layer as well as for discharging elevated capillary water in the soil body of the foundation. The composite geotextile material capillary barrier draining structure can discharge embankment water to a greater extent, so that the water contents in the base layer and the foundation are reduced, the reduction of embankment soil strength and embankment settlement generated by increase of the water content are avoided, and the durability of the embankment is improved.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a composite geotechnical material capillary barrier drainage structure, and also relates to an unsaturated compacted loess embankment structure. Background technique [0002] Traditional drainage techniques only apply saturated seepage conditions, however, the movement of water in the near surface is unsaturated seepage. Therefore, the traditional drainage technology cannot completely and effectively solve the engineering problems related to unsaturated seepage. [0003] At present, there is no mature technical method suitable for unsaturated seepage drainage. Traditional drainage systems need to be improved based on unsaturated seepage. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a composite geotechnical material capillary barrier drainage structure suitable for unsaturated seepage with si...

Claims

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Application Information

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IPC IPC(8): E02D19/18E02D19/20
Inventor 赵彦旭
Owner CHINA RAILWAY 21TH BUREAU GROUP
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