CN109930428A - A kind of high-speed railway subgrade composite geo-membrane - Google Patents
A kind of high-speed railway subgrade composite geo-membrane Download PDFInfo
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- CN109930428A CN109930428A CN201811478665.8A CN201811478665A CN109930428A CN 109930428 A CN109930428 A CN 109930428A CN 201811478665 A CN201811478665 A CN 201811478665A CN 109930428 A CN109930428 A CN 109930428A
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- membrane
- geotextiles
- polypropylene filament
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- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 239000012528 membrane Substances 0.000 title claims abstract description 45
- -1 polypropylene Polymers 0.000 claims abstract description 104
- 239000004743 Polypropylene Substances 0.000 claims abstract description 85
- 229920001155 polypropylene Polymers 0.000 claims abstract description 85
- 239000004746 geotextile Substances 0.000 claims abstract description 61
- 239000004744 fabric Substances 0.000 claims abstract description 27
- 239000004698 Polyethylene Substances 0.000 claims abstract description 19
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 229920000573 polyethylene Polymers 0.000 claims abstract description 19
- 229920000915 polyvinyl chloride Polymers 0.000 claims abstract description 17
- 239000004800 polyvinyl chloride Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 13
- 238000007596 consolidation process Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000009172 bursting Effects 0.000 description 11
- 239000011440 grout Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 230000001458 anti-acid effect Effects 0.000 description 3
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000007306 turnover Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000010345 tape casting Methods 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Landscapes
- Road Paving Structures (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of high-speed railway subgrade composite geo-membrane with good drainage performance, and significantly improves its stability in use to effectively improve the corrosion resistance and freeze-thaw resistance property of composite geo-membrane.Composite geo-membrane is combined by upper layer polypropylene filament composite earthwork cloth, intermediate layer polyethylene or the polyvinyl chloride composite geo-membrane and lower layer's polypropylene filament needle-punched geotextiles stacked gradually from top to down；The upper layer polypropylene filament composite earthwork cloth is combined by the thin polypropylene filament geotextiles in upper layer, lower coarse polypropylene filament geotextiles, grammes per square metre 150g/m2‑300g/m2, the grammes per square metre of thin polypropylene filament geotextiles is 50g/m at the middle and upper levels2‑150g/m2, fibre fineness 5-7D, the grammes per square metres of lower coarse polypropylene filament geotextiles is 75g/m2‑250g/m2, fiber fineness be 9-15D.
Description
Technical field
The invention belongs to architectural engineerings, civil engineering waterproof technique field, and in particular to a kind of high-speed railway subgrade use is multiple
Close geomembrane.
Background technique
Bedding is a kind of common disease of China railways roadbed there is a phenomenon where rising soil, and is prevented using composite geo-membrane
Bedding turns over mud grout and is used widely, mainly polyester composite geo-membrane used at present, but due to polyester geotex-tile
Anti acid alkali performance is weak, poor corrosion resistance, is difficult to be adapted to Along Railway complex environment, especially in the environment such as high and cold, high salinity
It easily corrodes and loses strength.And geotextiles structure in upper layer is easy to be blocked by gravel existing composite geo-membrane in the long-term use
Its transverse drainage ability is substantially reduced, be easy to cause earth's surface to penetrate into rainwater and builds up, influence the stability and use of railway bed
Service life.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high-speed railway subgrade composite geo-membranes, to effectively improve
The corrosion resistance and freeze-thaw resistance property of composite geo-membrane with good drainage performance, and significantly improve it and use stabilization
Property.
The technical solution adopted by the present invention to solve the technical problems is as follows:
A kind of high-speed railway subgrade composite geo-membrane of the invention, it is characterized in that: upper by what is stacked gradually from top to down
Layer polypropylene long filament composite earthwork cloth, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane and lower layer's polypropylene filament needle thorn soil
Work cloth is combined；The upper layer polypropylene filament composite earthwork cloth is by the thin polypropylene filament geotextiles in upper layer, lower coarse poly- third
Alkene long filament geotextiles are combined, grammes per square metre 150g/m2-300g/m2, at the middle and upper levels the grammes per square metre of thin polypropylene filament geotextiles be
50g/m2-150g/m2, fibre fineness 5-7D, the grammes per square metres of lower coarse polypropylene filament geotextiles is 75g/m2-250g/m2, it is fine
The fineness of dimension is 9-15D.
The grammes per square metre of lower layer's polypropylene filament needle-punched geotextiles is 150g/m2-300g/m2, fibre fineness 4-7D.
The thickness 0.3-1.0mm of the intermediate layer polyethylene or polyvinyl chloride composite geo-membrane.
The invention has the advantages that upper layer and lower layer are polypropylene filament geotextiles, because polypropylene is long-chain hydrocarbon knot
Structure, structural stability is good, have excellent acid-proof alkaline, within the scope of PH2-13 can stable for extended periods of time, corrosion resistance
Good, freeze-thaw resistance property is good, therefore composite geo-membrane has excellent anti acid alkali performance energy, good corrosion resistance, and winter resistance is good, Neng Goushi
Answer various complex environments without performance change；Upper layer polypropylene filament composite earthwork cloth has upper layer and lower layer structure, makes
Composite geo-membrane of the present invention can keep excellent transverse drainage performance for a long time, and it is tensile strength with higher, anti-tear
Fragility energy and CBR bursting strength, stability in use are very excellent；Surface water can be effectively prevent, which to penetrate into roadbed lower layer, influences roadbed
Stability prevents underground water from turning over and causes to turn over the generation of mud grout phenomenon.
Detailed description of the invention
This specification includes such as next width attached drawing:
Fig. 1 is a kind of sectional schematic diagram of high-speed railway subgrade composite geo-membrane of the present invention；
Component and corresponding label: upper layer polypropylene filament composite earthwork cloth 10, the thin polypropylene filament in upper layer are shown in figure
Geotextiles 11, lower coarse polypropylene filament geotextiles 12, polyethylene or polyvinyl chloride composite geo-membrane 20, polypropylene filament needle thorn
Geotextiles 30.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Referring to Fig.1, a kind of high-speed railway subgrade of the invention is with composite geo-membrane by the upper layer that stacks gradually from top to down
Polypropylene filament composite earthwork cloth 10, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 and lower layer's polypropylene filament needle thorn
Geotextiles 30 are combined.Upper layer, two layers of lower layer are polypropylene filament geotextiles, because polypropylene is long-chain hydrocarbon structure, knot
Structure stability is good, has excellent acid-proof alkaline, within the scope of PH2-13 can stable for extended periods of time, good corrosion resistance is resistance to
Freeze thawing performance is good, therefore composite geo-membrane has excellent anti acid alkali performance energy, good corrosion resistance, and winter resistance is good, can adapt to each
Kind complex environment is without performance change.
Referring to Fig.1, the upper layer polypropylene filament composite earthwork cloth 10 is by the thin polypropylene filament geotextiles 11 in upper layer, lower layer
Thick polypropylene filament geotextiles 12 are combined, grammes per square metre 150g/m2-300g/m2.The thin polypropylene filament geotextiles 11 in upper layer
Grammes per square metre is 50g/m2-150g/m2, fibre fineness 5-7D, its main filtration, can both obstruct extraneous gravel enter it is upper
Inside layer polypropylene composite earthwork cloth, and it is able to maintain the permeability that earth's surface penetrates into rainwater.Lower coarse polypropylene filament geotextiles 12
Grammes per square metre be 75g/m2-250g/m2, fiber fineness be 9-15D, porosity with higher, primarily serve transverse drainage work
With.Work is pierced by needle after the thin polypropylene filament geotextiles 11 in the upper layer, the stacking heating of lower coarse polypropylene filament geotextiles 12
Skill consolidation is integrated.
Referring to Fig.1, the intermediate layer polyethylene or 20 main function of polyvinyl chloride composite geo-membrane are antiseepages, that is, prevent ground
Table water, which penetrates into roadbed lower layer, influences the stability of roadbed, and prevents underground water from turning over and cause to turn over mud grout, and thickness is generally
0.3-1.0mm。
Referring to Fig.1,30 grammes per square metre of lower layer's polypropylene filament needle-punched geotextiles is 150g/m2-300g/m2, fibre fineness be
4-7, tensile strength, tear resistance and CBR bursting strength with higher, main its enhance protective action, prevent lower layer's sand
Gravel damages middle layer composite geo-membrane, causes to leak.
Referring to Fig.1, a kind of high-speed railway subgrade of the present invention is with composite geo-membrane by the upper strata that stacks gradually from top to down
Polypropylene filaments composite earthwork cloth 10, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 and lower layer's polypropylene filament needle thorn soil
Work cloth 30 is combined, and according to the membrane derived difference of geotechnique, can be first production geomembrane and reuse hot complex method makes three layers
Structure composite together, can also directly carry out compound when the tape casting produces geomembrane.In view of polypropylene filament geotextiles
Fusing point is lower, and the film that squeezes out is higher to temperature when contacting with geotextiles when producing geomembrane using the tape casting, is easy to damage soil
Work cloth performance, therefore hot complex method is preferentially selected to be processed, i.e., the described upper layer polypropylene filament composite earthwork cloth 10, centre
Strata ethylene or polyvinyl chloride composite geo-membrane 20 and lower layer's polypropylene filament needle-punched geotextiles 30 are consolidated using hot complex method
It is integrated.
Embodiment 1:
The grammes per square metre of upper layer polypropylene filament composite earthwork cloth 10 is 150g/m2, including the thin polypropylene filament geotextiles in upper layer
11 and lower coarse polypropylene filament geotextiles 12.Its at the middle and upper levels thin polypropylene filament geotextiles 11 grammes per square metre be 50g/m2, fiber
Fineness is 5D, and the grammes per square metre of lower coarse polypropylene filament geotextiles 12 is 100g/m2, fibre fineness 11D.The thin polypropylene in upper layer is long
Silk geotextiles 11 and lower coarse polypropylene filament geotextiles 12 are produced by spunbonded production line device, are then stacked together logical
It crosses needling process and is fixedly arranged at one.The vertically and horizontally tensile strength average value of upper layer polypropylene filament composite earthwork cloth 10 is 9.5kN/
M, tearing strength 523.6N, CBR bursting strength 1870N, permeable amount is 7.8l/m.h in plane.
Intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 are in the present embodiment the polyethylene geotechnique of 0.4mm thickness
Film is produced using rolling process.
The grammes per square metre of lower layer's polypropylene filament needle-punched geotextiles 30 is 150g/m2, fibre fineness 5D, vertically and horizontally tension is strong
Degree average value is 11.3kN/m, tearing strength 573.6N, CBR bursting strength 2070N.
Upper layer polypropylene filament composite earthwork cloth 10, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 and lower strata
Polypropylene filaments needle-punched geotextiles 30 are integrated using hot complex method consolidation.The present embodiment product is tested, tension is strong
Degree mean value is 27.725kN/m, tearing strength 1048N, CBR bursting strength 4500N, resistance to hydrostatic pressure 0.8MPa.
Embodiment 2:
The grammes per square metre of upper layer polypropylene filament composite earthwork cloth 10 is 200g/m2, including the thin polypropylene filament geotextiles in upper layer
11 and lower coarse polypropylene filament geotextiles 12.Its at the middle and upper levels thin polypropylene filament geotextiles 11 grammes per square metre be 50g/m2, fiber
Fineness is 5D, and the grammes per square metre of lower coarse polypropylene filament geotextiles 12 is 150g/m2, fibre fineness 11D.The thin polypropylene in upper layer is long
Silk geotextiles 11 and lower coarse polypropylene filament geotextiles 12 are produced by spunbonded production line device, are then stacked together logical
It crosses needling process and is fixedly arranged at one.The vertically and horizontally tensile strength average value of upper layer polypropylene filament composite earthwork cloth 10 is
12.1kN/m, tearing strength 673N, CBR bursting strength 2398N, permeable amount is 11.8l/m.h in plane.
Intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 are in the present embodiment the polyethylene geotechnique of 0.5mm thickness
Film is produced using rolling process.
The grammes per square metre of lower layer's polypropylene filament needle-punched geotextiles 30 is 200g/m2, fibre fineness 7D, vertically and horizontally tension is strong
Degree average value is 15.6kN/m, tearing strength 793N, CBR bursting strength 2620N.
Upper layer polypropylene filament composite earthwork cloth 10, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 and lower strata
Polypropylene filaments needle-punched geotextiles 30 are integrated using hot complex method consolidation.The present embodiment product is tested, tension is strong
Degree mean value is 38.9kN/m, tearing strength 1432N, CBR bursting strength 5752N, resistance to hydrostatic pressure 1.0MPa.
Embodiment 3:
The grammes per square metre of upper layer polypropylene filament composite earthwork cloth 10 is 200g/m2, including the thin polypropylene filament geotextiles in upper layer
11 and lower coarse polypropylene filament geotextiles 12.Its at the middle and upper levels thin polypropylene filament geotextiles 11 grammes per square metre be 50g/m2, fiber
Fineness is 5D, and the grammes per square metre of lower coarse polypropylene filament geotextiles 12 is 150g/m2, fibre fineness 11D.The thin polypropylene in upper layer is long
Silk geotextiles 11 and lower coarse polypropylene filament geotextiles 12 are produced by spunbonded production line device, are then stacked together logical
It crosses needling process and is fixedly arranged at one.The vertically and horizontally tensile strength average value of upper layer polypropylene filament composite earthwork cloth 10 is
12.1kN/m, tearing strength 673N, CBR bursting strength 2398N, permeable amount is 11.8l/m.h in plane.
Intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 are in the present embodiment the polyethylene geotechnique of 0.5mm thickness
Film is produced using rolling process.
The grammes per square metre of lower layer's polypropylene filament needle-punched geotextiles 30 is 150g/m2, fibre fineness 5D.The polypropylene filament
The vertically and horizontally tensile strength average value of geotextiles is 31.4kN/m, tearing strength 1180N, CBR bursting strength 2030N.
Upper layer polypropylene filament composite earthwork cloth 10, intermediate layer polyethylene or polyvinyl chloride composite geo-membrane 20 and lower strata
Polypropylene filaments needle-punched geotextiles 30 are integrated using hot complex method consolidation.The present embodiment product is tested, tension is strong
Degree mean value is 38.9kN/m, tearing strength 1432N, CBR bursting strength 5042N, resistance to hydrostatic pressure 1.0MPa.
A kind of high-speed railway subgrade of the invention with composite geo-membrane compared with existing polyester composite geo-membrane, Ke Yiyou
Effect improves the corrosion resistance and freeze-thaw resistance property of composite geo-membrane, with good drainage performance, and significantly improves it and makes
With stability, surface water can be effectively prevent, which to penetrate into roadbed lower layer, influences the stability of roadbed, prevents underground water from turning over and causes to turn over mud
Grout phenomenon occurs.
The above is a kind of some principles of high-speed railway subgrade composite geo-membrane of the invention that explain through diagrams, and
It is non-be the present invention is confined to shown in and the specific structure and the scope of application in, therefore all phases that may be utilized
It should modify and equivalent, belong to the applied the scope of the patents of the present invention.
Claims (5)
1. a kind of high-speed railway subgrade composite geo-membrane, it is characterized in that: long by the upper layer polypropylene stacked gradually from top to down
Silk composite earthwork cloth (10), intermediate layer polyethylene or polyvinyl chloride composite geo-membrane (20) and lower layer's polypropylene filament needle thorn geotechnique
Cloth (30) is combined；The upper layer polypropylene filament composite earthwork cloth (10) by the thin polypropylene filament geotextiles (11) in upper layer,
Lower coarse polypropylene filament geotextiles (12) are combined, grammes per square metre 150g/m2-300g/m2, thin polypropylene filament at the middle and upper levels
The grammes per square metre of geotextiles (11) is 50g/m2-150g/m2, fibre fineness 5-7D, gram of lower coarse polypropylene filament geotextiles (12)
Weight is 75g/m2-250g/m2, fiber fineness be 9-15D.
2. a kind of high-speed railway subgrade composite geo-membrane as described in claim 1, it is characterized in that: the lower layer polypropylene is long
Silk needle-punched geotextiles (30) grammes per square metre is 150g/m2-300g/m2, fibre fineness 4-7D.
3. a kind of high-speed railway subgrade composite geo-membrane as described in claim 1, it is characterized in that: the intermediate layer polyethylene
Or the thickness 0.3-1.0mm of polyvinyl chloride composite geo-membrane (20).
4. a kind of railway bed composite geo-membrane as described in claim 1, it is characterized in that: the thin polypropylene filament in the upper layer
It is integrated after geotextiles (11), lower coarse polypropylene filament geotextiles (12) stacking heating by needling process consolidation.
5. a kind of high-speed railway subgrade composite geo-membrane as described in Claims 1-4 any one, it is characterized in that: described
Upper layer polypropylene filament composite earthwork cloth (10), intermediate layer polyethylene or polyvinyl chloride composite geo-membrane (20) and lower layer polypropylene
Long filament needle-punched geotextiles (30) are integrated using hot complex method consolidation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811478665.8A CN109930428A (en) | 2018-12-05 | 2018-12-05 | A kind of high-speed railway subgrade composite geo-membrane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811478665.8A CN109930428A (en) | 2018-12-05 | 2018-12-05 | A kind of high-speed railway subgrade composite geo-membrane |
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| CN109930428A true CN109930428A (en) | 2019-06-25 |
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Cited By (2)
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| CN110863301A (en) * | 2019-11-14 | 2020-03-06 | 天鼎丰聚丙烯材料技术有限公司 | High-elasticity waterproof geotextile and preparation method and application thereof |
| CN111455757A (en) * | 2020-04-14 | 2020-07-28 | 黑龙江省龙建路桥第六工程有限公司 | Road bed universe is hydrophobic-compound three-dimensional geomembrane that blocks water |
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Effective date of registration: 20220420 Address after: Jinniu District Kam Tong Road Chengdu city Sichuan province 610031 No. 3 Applicant after: CHINA RAILWAY ERYUAN ENGINEERING GROUP Co.,Ltd. Applicant after: TIANDING FENGJU PROPYLENE MATERIAL TECHNOLOGY CO.,LTD. Applicant after: Sichuan tietuo Technology Co.,Ltd. Address before: No. 3, Tongjin Road, Chengdu, Sichuan 610301 Applicant before: CHINA RAILWAY ERYUAN ENGINEERING GROUP Co.,Ltd. Applicant before: TIANDING FENGJU PROPYLENE MATERIAL TECHNOLOGY CO.,LTD. Applicant before: SICHUAN TIECHUANG TECHNOLOGY Co.,Ltd. |
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Application publication date: 20190625 |