CN105256683A - Permafrost region roadbed thermal insulation construction method - Google Patents
Permafrost region roadbed thermal insulation construction method Download PDFInfo
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- CN105256683A CN105256683A CN201510574648.4A CN201510574648A CN105256683A CN 105256683 A CN105256683 A CN 105256683A CN 201510574648 A CN201510574648 A CN 201510574648A CN 105256683 A CN105256683 A CN 105256683A
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Abstract
The invention discloses a permafrost region roadbed thermal insulation construction method. The method comprises the following steps: firstly, excavation and replacement construction is carried out; secondly, a block crushed rock layer is filled; thirdly, joint filling cement is cast on the block crushed rock layer, then an aluminum foil layer, a thermal resistant cold conduction layer and an geotechnical cloth layer are paved in order, and then a fiber concrete layer is cast; fourthly, a compacted embankment filling soil is filled finally. In the construction method, a thermal insulation layer is arranged in the permafrost road segment, disturbance to the permafrost layer can be controlled effectively, the performances of the permafrost layer are kept stable, therefore the whole stability of the roadbed is raised, and the permafrost road segment roadbed is prevented from diseases of subsidence, frost heave, pavement cracking, collapse and the like. Under the same conditions, the replacement thickness can be reduced, the construction cost is saved and the construction period is shortened.
Description
Technical field
The present invention relates to a kind of construction method of road structure, especially a kind of permafrost area embankment heat insulating construction method.
Background technology
Frozen soil refers to the soil body and the rock that have subzero temperature and contain ice, is mainly divided into ever-frozen ground and seasonal frozen ground by life span.China's ever-frozen ground area accounts for 22.4% of area, is third place in the world frozen soil big country.Due to ice and the existence of not freezing water in frozen soil, its character is extremely complicated and very responsive to temperature.Highway engineering construction and global warming all can cause the intensification of frozen soil, bring thaw collapse disease to roadbed, the stability of serious harm Permafrost Area road.
At present, in the Qinghai-Tibet Platean of China, northeast Xing'anling mountains and the area such as Tianshan Mountains, Altai Mountains, owing to being located in ice box, just special soil property is defined---permafrost, permafrost is generally divided into two-layer: top is the mobile layer (seasonal frozen ground) that Xia Rongdong freezes, and bottom is the frozen crust for many years do not melted all the year round.
In cold plateau area road construction, often permafrost location can be run into.How to guarantee the permafrost not destroyed (preventing from melting) bottom road foundation, ensure that the stability of road foundation is the problem that road construction for a long time needs to solve.
Summary of the invention
The object of the present invention is to provide a kind of permafrost area embankment structure, by the following technical solutions:
A kind of permafrost area embankment heat insulating construction method, comprises the following steps:
(1) altering fill is excavated
Excavate the following seasonal frozen ground of above-ground route, fill described packing layer, Slag Layer also carries out compacting with heavy road roller;
The preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 18-28%, flyash 25-50%, ardealite 25-35%, water glass 0.5-1.5%, NaAlO20.1 ~ 0.2%, modified acrylic acid emulsion 2-15%, pours above-mentioned raw materials into stirrer for mixing and stirs, obtain packing layer;
Described Slag Layer: Slag Layer is two-layer, every layer thickness is 45-75mm, and lower level floor slag embeds in packing layer, and slag particle diameter is less than or equal to 20mm;
(2) fill pipe-massive stone layer, the granularity of described pipe-massive stone layer is 15-100cm, and filling-up thickness is 50-200cm, leveling;
(3) gap-filling cement is cast on pipe-massive stone layer, aluminium foil layer of then mating formation successively, thermal resistance conduction cooling layer, geotechnological layer of cloth, then pours into a mould fibrous concrete layer;
Described gap-filling cement layer is composed of the following components: cement: 65-100 part, pulverized limestone: 15-28 part; Flyash: 20-35 part, steel fibre: 25-65 part, stone: 15-35 part: gangue: 5-10 part, kieselguhr: 5-15 part: amino silicone 5-6 part, acrylic resin: 2-4 part, resorcinol: 1-3 part, aliphatic carboxylic acid triethanolamine salt: 0.1-0.5 part, water 20-90 part;
Aluminium foil layer: gap-filling cement layer lays aluminium foil layer;
Described thermal resistance conduction cooling layer is at least the one in polystyrene (EPS), polyurethane (PU), injection moulding polystyrene (XPS);
Described fibrous concrete layer; Be made up of the raw material of following weight portion: cement 300-400 part, river sand 150-200 part, rubble 300-400 part, swell soil 60-100 part, wood fibre 15-20 part, bamboo fibre 15-20 part, potassium peroxydisulfate 3-4 part, toluene di-isocyanate(TDI) 10-15 part, allyl heptanoate 1-5 part, natrium malicum: 1-2 part, BTA: 1-2 part, NaOH: 1-2 part, steel fibre: 5-15 part, water are appropriate;
(4) closely knit embankment filled soil is finally filled.
Further, the preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 23%, flyash 42%, ardealite 26%, water glass 0.6%, NaAlO20.15%, modified acrylic acid emulsion 8.25%.
Further, described Slag Layer: Slag Layer is two-layer, every layer thickness is 50mm, and lower level floor slag embeds in packing layer, and slag particle diameter is 10-15mm, and the granularity of described pipe-massive stone layer is 55cm.
Further, described gap-filling cement layer is composed of the following components: cement: 72 parts, pulverized limestone: 19 parts; Flyash: 28 parts, steel fibre: 30 parts, stone: 22 parts: gangue: 8 parts, kieselguhr: 6 parts: amino silicone 5.5 parts, acrylic resin: 3 parts, resorcinol: 2 parts, aliphatic carboxylic acid triethanolamine salt: 0.35 part, 30 parts, water.
Further, described gap-filling cement layer is composed of the following components: cement: 85 parts, pulverized limestone: 27 parts; Flyash: 33 parts, steel fibre: 40 parts, stone: 32 parts: gangue: 9 parts, kieselguhr: 12 parts: amino silicone 6 parts, acrylic resin: 2.7 parts, resorcinol: 2.55 parts, aliphatic carboxylic acid triethanolamine salt: 0.35 part, 45 parts, water.
Further, aluminium foil layer thickness is 1-5mm.
Further, fibrous concrete layer; Be made up of the raw material of following weight portion: cement 360 parts, 160 parts, river sand, rubble 345 parts, swell soil 82 parts, wood fibre 18 parts, bamboo fibre 16 parts, potassium peroxydisulfate 3.6 parts, toluene di-isocyanate(TDI) 12 parts, allyl heptanoate 3.4 parts, natrium malicum: 1.6 parts, BTA: 1.3 parts, NaOH: 1.5 parts, steel fibre: 11.2 parts, water is appropriate.
Effect of the present invention is: permafrost area embankment structure of the present invention, by the requirement to integrally-built design laying and concrete layers of material, utilize the heat conduction performance of ventilating of different materials, give full play to respective advantage, realize while cold season sucks cold energy in a large number, the caloric receptivity of effective restriction warm season, significantly improves the clean thermal discharge of roadbed in a freezing and thawing cycle, thus more effectively reduces roadbed and to underlie the temperature of frozen soil.Therefore, this roadbed can protect the ever-frozen ground under roadbed, avoids frost-heaving and thawing to occur, and improves the safety and stability of road structure, and construction method is clear and definite, can be used as the basic skills that Permafrost Area highway subgrade is built.
Detailed description of the invention
Embodiment 1
A kind of permafrost area embankment heat insulating construction method, comprises the following steps:
(1) altering fill is excavated
Excavate the following seasonal frozen ground of above-ground route, fill described packing layer, Slag Layer also carries out compacting with heavy road roller;
The preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 26%, flyash 44%, ardealite 26%, water glass 0.8%, NaAlO20.15%, modified acrylic acid emulsion 3.05%, pours above-mentioned raw materials into stirrer for mixing and stirs, obtain packing layer;
Described Slag Layer: Slag Layer is two-layer, every layer thickness is 46mm, and lower level floor slag embeds in packing layer, and slag particle diameter is less than or equal to 20mm;
(2) fill pipe-massive stone layer, the granularity of described pipe-massive stone layer is 19cm, and filling-up thickness is 100cm, leveling;
(3) gap-filling cement is cast on pipe-massive stone layer, aluminium foil layer of then mating formation successively, thermal resistance conduction cooling layer, geotechnological layer of cloth, then pours into a mould fibrous concrete layer;
Described gap-filling cement layer is composed of the following components: cement: 78 parts, pulverized limestone: 18 parts; Flyash: 31 parts, steel fibre: 42 parts, stone: 23 parts: gangue: 7 parts, kieselguhr: 8 parts: amino silicone 5.5 parts, acrylic resin: 2.8 parts, resorcinol: 1.9 parts, aliphatic carboxylic acid triethanolamine salt: 0.35 part, 30 parts, water;
Aluminium foil layer: gap-filling cement layer lays aluminium foil layer;
Described thermal resistance conduction cooling layer is at least polyurethane and injection moulding polystyrene.
Fibrous concrete layer; Be made up of the raw material of following weight portion: cement 325 parts, 186 parts, river sand, rubble 315 parts, swell soil 85 parts, wood fibre 16 parts, bamboo fibre 17 parts, potassium peroxydisulfate 3.8 parts, toluene di-isocyanate(TDI) 12.5 parts, allyl heptanoate 3.6 parts, natrium malicum: 1.45 parts, BTA: 1.76 parts, NaOH: 1.34 parts, steel fibre: 5.8 parts, water is appropriate;
(4) closely knit embankment filled soil is finally filled;
After construction, permafrost area embankment structure comprises following deck: be followed successively by packing layer, Slag Layer, pipe-massive stone layer, gap-filling cement layer, aluminium foil layer, thermal resistance conduction cooling layer, geotechnological layer of cloth, fibrous concrete layer, making embankment filled soil layer from top to bottom.
Embodiment 2
A kind of permafrost area embankment heat insulating construction method, comprises the following steps:
(1) altering fill is excavated
Excavate the following seasonal frozen ground of above-ground route, fill described packing layer, Slag Layer also carries out compacting with heavy road roller;
The preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 21%, flyash 42%, ardealite 28%, water glass 1.1%, NaAlO20.17%, modified acrylic acid emulsion 7.73%, pours above-mentioned raw materials into stirrer for mixing and stirs, obtain packing layer;
Described Slag Layer: Slag Layer is two-layer, every layer thickness is 50mm, and lower level floor slag embeds in packing layer, and slag particle diameter is less than or equal to 20mm;
(2) fill pipe-massive stone layer, the granularity of described pipe-massive stone layer is 25cm; , filling-up thickness is 120cm, leveling;
(3) gap-filling cement is cast on pipe-massive stone layer, aluminium foil layer of then mating formation successively, thermal resistance conduction cooling layer, geotechnological layer of cloth, then pours into a mould fibrous concrete layer;
Described gap-filling cement layer is composed of the following components: cement: 78 parts, pulverized limestone: 22 parts; Flyash: 20 parts, steel fibre: 36 parts, stone: 23 parts: gangue: 7 parts, kieselguhr: 8 parts: amino silicone 5.5 parts, acrylic resin: 2.6 parts, resorcinol: 2.3 parts, aliphatic carboxylic acid triethanolamine salt: 0.33 part, 35 parts, water;
Aluminium foil layer: gap-filling cement layer lays aluminium foil layer;
Described thermal resistance conduction cooling layer is injection moulding polystyrene (XPS);
Fibrous concrete layer; Be made up of the raw material of following weight portion: cement 360 parts, 170 parts, river sand, rubble 320 parts, swell soil 76 parts, wood fibre 17 parts, bamboo fibre 19 parts, potassium peroxydisulfate 3.75 parts, toluene di-isocyanate(TDI) 13.2 parts, allyl heptanoate 3.3 parts, natrium malicum: 1.7 parts, BTA: 1.65 parts, NaOH: 1.4 parts, steel fibre: 9.9 parts, water is appropriate;
(4) closely knit embankment filled soil is finally filled.
After construction, permafrost area embankment structure comprises following deck: be followed successively by packing layer, Slag Layer, pipe-massive stone layer, gap-filling cement layer, aluminium foil layer, thermal resistance conduction cooling layer, geotechnological layer of cloth, fibrous concrete layer, making embankment filled soil layer from top to bottom.
Claims (7)
1. a permafrost area embankment heat insulating construction method, is characterized in that, comprises the following steps:
(1) altering fill is excavated
Excavate the following seasonal frozen ground of above-ground route, fill packing layer, Slag Layer, and carry out compacting with heavy road roller;
The preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 18-28%, flyash 25-50%, ardealite 25-35%, water glass 0.5-1.5%, NaAlO
20.1 ~ 0.2%, modified acrylic acid emulsion 2-15%, pour above-mentioned raw materials into stirrer for mixing and stir, obtain packing layer;
Described Slag Layer: Slag Layer is two-layer, every layer thickness is 45-75mm, and lower level floor slag embeds in packing layer, and slag particle diameter is less than or equal to 20mm;
(2) fill pipe-massive stone layer, the granularity of described pipe-massive stone layer is 15-100cm, and filling-up thickness is 50-200cm, leveling;
(3) gap-filling cement is cast on pipe-massive stone layer, aluminium foil layer of then mating formation successively, thermal resistance conduction cooling layer, geotechnological layer of cloth, then pours into a mould fibrous concrete layer;
Described gap-filling cement layer is composed of the following components: cement: 65-100 part, pulverized limestone: 15-28 part, flyash: 20-35 part, steel fibre: 25-65 part, stone: 15-35 part, gangue: 5-10 part, kieselguhr: 5-15 part, amino silicone: 5-6 part, acrylic resin: 2-4 part, resorcinol: 1-3 part, aliphatic carboxylic acid triethanolamine salt: 0.1-0.5 part, water 20-90 part;
Aluminium foil layer: gap-filling cement layer lays aluminium foil layer;
Described thermal resistance conduction cooling layer is at least the one in polystyrene (EPS), polyurethane (PU), injection moulding polystyrene (XPS);
Described fibrous concrete layer; Be made up of the raw material of following weight portion: cement 300-400 part, river sand 150-200 part, rubble 300-400 part, swell soil 60-100 part, wood fibre 15-20 part, bamboo fibre 15-20 part, potassium peroxydisulfate 3-4 part, toluene di-isocyanate(TDI) 10-15 part, allyl heptanoate 1-5 part, natrium malicum: 1-2 part, BTA: 1-2 part, NaOH: 1-2 part, steel fibre: 5-15 part, water are appropriate;
(4) closely knit embankment filled soil is finally filled.
2. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterized in that: the preparation method of described packing layer comprises the steps: that shared by each raw material, percetage by weight is: lime 23%, flyash 42%, ardealite 26%, water glass 0.6%, NaAlO
20.15%, modified acrylic acid emulsion 8.25%.
3. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterized in that: described Slag Layer: Slag Layer is two-layer, every layer thickness is 50mm, and lower level floor slag embeds in packing layer, slag particle diameter is 10-15mm, and the granularity of described pipe-massive stone layer is 55cm.
4. permafrost area embankment heat insulating construction method as claimed in claim 1, is characterized in that: described gap-filling cement layer is composed of the following components: cement: 72 parts, pulverized limestone: 19 parts; Flyash: 28 parts, steel fibre: 30 parts, stone: 22 parts: gangue: 8 parts, kieselguhr: 6 parts: amino silicone 5.5 parts, acrylic resin: 3 parts, resorcinol: 2 parts, aliphatic carboxylic acid triethanolamine salt: 0.35 part, 30 parts, water.
5. permafrost area embankment heat insulating construction method as claimed in claim 1, is characterized in that: described gap-filling cement layer is composed of the following components: cement: 85 parts, pulverized limestone: 27 parts; Flyash: 33 parts, steel fibre: 40 parts, stone: 32 parts: gangue: 9 parts, kieselguhr: 12 parts: amino silicone 6 parts, acrylic resin: 2.7 parts, resorcinol: 2.55 parts, aliphatic carboxylic acid triethanolamine salt: 0.35 part, 45 parts, water.
6. permafrost area embankment heat insulating construction method as claimed in claim 1, is characterized in that: aluminium foil layer thickness is 1-5mm.
7. permafrost area embankment heat insulating construction method as claimed in claim 1, is characterized in that: fibrous concrete layer; Be made up of the raw material of following weight portion: cement 360 parts, 160 parts, river sand, rubble 345 parts, swell soil 82 parts, wood fibre 18 parts, bamboo fibre 16 parts, potassium peroxydisulfate 3.6 parts, toluene di-isocyanate(TDI) 12 parts, allyl heptanoate 3.4 parts, natrium malicum: 1.6 parts, BTA: 1.3 parts, NaOH: 1.5 parts, steel fibre: 11.2 parts, water is appropriate.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908587A (en) * | 2016-04-28 | 2016-08-31 | 镇江市高等专科学校 | Roadbed thermal insulation construction method in frozen earth area |
| CN107326765A (en) * | 2017-08-25 | 2017-11-07 | 中铁西北科学研究院有限公司 | Handle segregated frozen ground ground lime pile and its construction method |
| CN107558339A (en) * | 2017-09-21 | 2018-01-09 | 南昌工程学院 | A kind of high road pavement construction method |
| CN109736141A (en) * | 2019-01-29 | 2019-05-10 | 中建新疆建工土木工程有限公司 | The anti-freeze expansion structural body and paving method of Railway Roadbed in Permafrost Regions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908587A (en) * | 2016-04-28 | 2016-08-31 | 镇江市高等专科学校 | Roadbed thermal insulation construction method in frozen earth area |
| CN107326765A (en) * | 2017-08-25 | 2017-11-07 | 中铁西北科学研究院有限公司 | Handle segregated frozen ground ground lime pile and its construction method |
| CN107558339A (en) * | 2017-09-21 | 2018-01-09 | 南昌工程学院 | A kind of high road pavement construction method |
| CN109736141A (en) * | 2019-01-29 | 2019-05-10 | 中建新疆建工土木工程有限公司 | The anti-freeze expansion structural body and paving method of Railway Roadbed in Permafrost Regions |
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