CN202849891U - Composite geotextile material capillary barrier drainage structure and unsaturated loess embankment structure - Google Patents

Composite geotextile material capillary barrier drainage structure and unsaturated loess embankment structure Download PDF

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Publication number
CN202849891U
CN202849891U CN2012205257121U CN201220525712U CN202849891U CN 202849891 U CN202849891 U CN 202849891U CN 2012205257121 U CN2012205257121 U CN 2012205257121U CN 201220525712 U CN201220525712 U CN 201220525712U CN 202849891 U CN202849891 U CN 202849891U
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China
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capillary barrier
layer
embankment
capillary
soil
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Expired - Fee Related
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CN2012205257121U
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赵彦旭
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China Railway 21st Bureau Group Co Ltd
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China Railway 21st Bureau Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/60Planning or developing urban green infrastructure

Abstract

The utility model discloses a composite geotextile material capillary barrier drainage structure and an unsaturated compacted loess embankment structure. The composite geotextile material capillary barrier drainage structure comprises a transport layer, a capillary barrier layer and an isolation layer from top to bottom in sequence, wherein the transport layer and the isolation layer are non-woven geotextiles in different specifications; the capillary barrier layer is a geonet; the capillary barrier layer prevents the seepage in the base layer soil body above the capillary barrier layer from entering the foundation soil body below; the water gathered in the transport layer is drained along the slope; and the isolation layer is mainly used for preventing the soil body below the barrier from entering the holes on the capillary barrier layer and simultaneously can be used for draining the capillary water rising in the foundation soil body. The composite geotextile material capillary barrier drainage structure can effectively carry out embankment drainage to a greater extent, so that the water contents in the base layer and the foundation are reduced, embankment soil body strength reduction and embankment settlement caused by water content increase are avoided, and the durability of the embankment is improved.

Description

Composite earthwork material capillary barrier discharge structure and unsaturation loess embankment structure
Technical field
The utility model belongs to technical field of civil engineering, particularly a kind of composite earthwork material capillary barrier discharge structure, and the utility model also relates to unsaturation Compacted Loess embankment structure.
Background technology
The tradition water discharge technology is applicable saturated flow condition only, yet the water movement in the near surface is unsaturated seepage.Thereby, the solution engineering problem relevant with unsaturated seepage that traditional water discharge technology can not be in full force and effect.
At present, also there is not the ripe technical method that is applicable to the unsaturated seepage draining.Traditional drainage system need to improve based on unsaturated seepage.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of simple in structure, composite earthwork material capillary barrier discharge structure that is applicable to unsaturated seepage that drainage effect is good.
It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking: a kind of composite earthwork material capillary barrier discharge structure is characterized in that this discharge structure forms by three layers, is followed successively by transport layer, capillary barrier layer and separation layer from top to bottom; Transport layer and separation layer are the non-woven geotextile of different size, and the capillary barrier layer is geonet.
The second technical problem to be solved in the utility model is to provide a kind of simple in structure, unsaturation Compacted Loess embankment structure that drainage effect is good.
It is as follows that the utility model solves the technical scheme that the second technical problem takes: a kind of unsaturation Compacted Loess embankment structure, comprise ground, roadbed and bedding, and it is characterized in that: be provided with composite earthwork material capillary barrier discharge structure between ground and the roadbed; Ground, composite earthwork material capillary barrier discharge structure, roadbed and bedding all are arranged to outside, both sides incline structure; Composite earthwork material capillary barrier discharge structure forms by three layers, is followed successively by from top to bottom transport layer, capillary barrier layer and separation layer; Transport layer and separation layer are the non-woven geotextile of different size, and the capillary barrier layer is geonet.
Seem from appearance, composite earthwork material capillary barrier is similar with traditional earth working material draining, but the function of composite earthwork material capillary barrier mainly is draining under negative pore water pressure; And the water discharge technology of traditional earth working material is mainly used in saturated flow, loss of strength, compression, expansion and the destruction of the soil body that the positive pore pressure that the control saturated flow produces causes.In addition, composite earthwork material capillary barrier does not need the water barrier of traditional earth working material draining.
The major function of composite earthwork material capillary barrier is: the capillary barrier layer stops the seepage flow in its top basic unit soil body to enter in the foundation soil body of below, because the accumulation of seepage flow, the transport layer water content increases, thereby its transmissibility is increased.If composite earthwork material capillary barrier tilts, the current of assembling in the transport layer can be discharged along the inclined-plane, so transport layer can be by unsaturated, thereby have stoped seepage flow to enter the capillary barrier layer.Separation layer is mainly used to stop the barrier below soil body to enter capillary barrier layer hole, can be used to simultaneously discharge the capillary water that rises in the foundation soil body, simultaneously, if the upper strata soil body and transport layer are because sharply seepage flow is and saturated, the separation layer geotextiles also can be discharged the saturated flow in the capillary barrier layer geonet.The freeze thawing phenomenon that the ponding that produces owing to capillarity for better eliminating causes, the separation layer geotextiles is preferably selected the larger geotextiles of relative transport layer grammes per square metre.
Composite earthwork material capillary barrier structure based on unsaturated seepage can effectively carry out the embankment draining greatly, water content in basic unit and the ground is reduced, avoid reducing and Embankment Subsidence the durability of raising embankment because water content increases the embankment soil strength that produces.
The utility model proposes the water discharge technology that is applicable to unsaturation Compacted Loess embankment.Composite earthwork material capillary barrier discharge structure based on unsaturated seepage improves traditional drainage system.Composite earthwork material capillary barrier technique can effectively carry out the draining of Compacted Loess embankment greatly, water content in basic unit and the ground is reduced, avoid reducing and Embankment Subsidence the durability of raising embankment because water content increases the embankment soil strength that produces.Equilibrium moisture content, the prevention basic unit soil body that composite earthwork material capillary barrier discharge structure can reduce basic unit's soil body positive hole pressure, prevention foundation soil body occur owing to the humidifying of seepage flow, the capillary water rising in the prevention foundation soil body, the soil layer that increase adds are isolated the raising embankment stability.
Capillary barrier technique theoretical foundation is the capillary water holding phenomenon that the unsaturation transmissibility difference at interface between upper strata fine grained soils and the lower floor's coarse-grained soil forms.When suction was higher, the hydraulic conductivity of fine grained soils was larger, and the hydraulic conductivity of coarse-grained soil is very little.Along with the increase of water content and reducing of suction, the hydraulic conductivity of fine grained soils increases, and the hydraulic conductivity of coarse-grained soil almost remains unchanged.At this moment, the water in the soil body can be from the fine grained soils laminar flow to the coarse grain soil layer, but continues to increase the water content of particulate soil layer.If the interface of the two tilts, the water in the particulate soil layer is discharged the soil body under the effect of gravitational potential.
Description of drawings
Fig. 1 is composite earthwork material capillary barrier discharge structure constructional drawing,
The saturated Compacted Loess embankment structure of Fig. 2 right and wrong schematic diagram,
The saturated Compacted Loess embankment of Fig. 3 right and wrong hull-borne schematic diagram.
Among the figure: 1-transport layer, 2-capillary barrier layer, 3-separation layer, 4-ground, 5-composite earthwork material capillary barrier discharge structure, 6-roadbed, 7-bedding.
The specific embodiment
As shown in Figure 1: the composite earthwork material capillary barrier discharge structure that the utility model provides forms by three layers; Be followed successively by from top to bottom transport layer 1, capillary barrier layer 2 and separation layer 3; Transport layer 1 and separation layer 3 are the non-woven geotextile of different size, and capillary barrier layer 2 is geonet.
The non-woven geotextile of transport layer 1 is long filament acupuncture geotextiles, and its grammes per square metre is 200-300 g/m 2The non-woven geotextile of separation layer 3 is long filament acupuncture geotextiles, and its grammes per square metre is 400-500 g/m 2
As shown in Figure 2: the unsaturation Compacted Loess embankment structure that the utility model provides, comprise ground 4, roadbed 6 and bedding 7, be provided with composite earthwork material capillary barrier discharge structure 5 between ground 4 and the roadbed 6; Ground 4, composite earthwork material capillary barrier discharge structure 5, roadbed 6 all are arranged to outside, both sides incline structure with bedding 7; Composite earthwork material capillary barrier discharge structure 5 forms by three layers, is followed successively by from top to bottom transport layer 1, capillary barrier layer 3 and separation layer 3; Transport layer 1 and separation layer 3 are the non-woven geotextile of different size, and capillary barrier layer 2 is geonet.Referring to Fig. 3: the arrow among Fig. 3 represents the trend of seepage flow, capillary barrier layer 2 stops the seepage flow in its top basic unit soil body to enter in the foundation soil body of below, because in unsaturation Compacted Loess embankment, composite earthwork material capillary barrier discharge structure 5 tilts, the current of assembling in the transport layer 1 can be discharged along the inclined-plane, therefore transport layer 1 can be by unsaturated, thereby stoped seepage flow to enter capillary barrier layer 2.

Claims (3)

1. composite earthwork material capillary barrier discharge structure, it is characterized in that: this discharge structure forms by three layers, is followed successively by from top to bottom transport layer, capillary barrier layer and separation layer; Transport layer and separation layer are the non-woven geotextile of different size, and the capillary barrier layer is geonet.
2. a kind of composite earthwork material capillary barrier discharge structure as claimed in claim 1 is characterized in that:
The non-woven geotextile of transport layer is long filament acupuncture geotextiles, and its grammes per square metre is 200-300 g/m 2The non-woven geotextile of separation layer is long filament acupuncture geotextiles, and its grammes per square metre is 400-500 g/m 2
3. a unsaturation Compacted Loess embankment structure comprises ground, roadbed and bedding, it is characterized in that: be provided with composite earthwork material capillary barrier discharge structure between ground and the roadbed; Ground, composite earthwork material capillary barrier discharge structure, roadbed and bedding all are arranged to outside, both sides incline structure; Composite earthwork material capillary barrier discharge structure forms by three layers, is followed successively by from top to bottom transport layer, capillary barrier layer and separation layer; Transport layer and separation layer are the non-woven geotextile of different size, and the capillary barrier layer is geonet.
CN2012205257121U 2012-10-15 2012-10-15 Composite geotextile material capillary barrier drainage structure and unsaturated loess embankment structure Expired - Fee Related CN202849891U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852153A (en) * 2012-10-15 2013-01-02 中铁二十一局集团有限公司 Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure
CN103485322A (en) * 2013-09-10 2014-01-01 河海大学 Capillary barrier roadbed structure capable of effectively preventing and treating roadbed humidification diseases and construction method
ES2552672A1 (en) * 2015-07-10 2015-12-01 Universidad Politécnica De Cartagena Installation procedure, in a soil or waste deposit, with contaminating elements or compounds, of a multilayer physical barrier to interrupt vertical water flows (Machine-translation by Google Translate, not legally binding)
CN108035333A (en) * 2017-12-14 2018-05-15 武汉轻工大学 A kind of reinforcement is every drainage coiled material and its construction method
CN108951332A (en) * 2018-07-21 2018-12-07 河南城建学院 A kind of building waste stabilized expansive soil road structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102852153A (en) * 2012-10-15 2013-01-02 中铁二十一局集团有限公司 Composite geotextile material capillary barrier draining structure and unsaturated loess embankment structure
CN103485322A (en) * 2013-09-10 2014-01-01 河海大学 Capillary barrier roadbed structure capable of effectively preventing and treating roadbed humidification diseases and construction method
CN103485322B (en) * 2013-09-10 2016-08-03 河海大学 The capillary retardance road structure of a kind of effective preventing and treating roadbed humidifying disease and construction method
ES2552672A1 (en) * 2015-07-10 2015-12-01 Universidad Politécnica De Cartagena Installation procedure, in a soil or waste deposit, with contaminating elements or compounds, of a multilayer physical barrier to interrupt vertical water flows (Machine-translation by Google Translate, not legally binding)
WO2017009507A1 (en) * 2015-07-10 2017-01-19 Universidad Politecnica De Cartagena Method for installing a multilayer physical barrier in soil containing contaminating waste, to interrupt vertical water flows in said soil
CN108035333A (en) * 2017-12-14 2018-05-15 武汉轻工大学 A kind of reinforcement is every drainage coiled material and its construction method
CN108951332A (en) * 2018-07-21 2018-12-07 河南城建学院 A kind of building waste stabilized expansive soil road structure

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