CN105256683B - Permafrost region roadbed thermal insulation construction method - Google Patents
Permafrost region roadbed thermal insulation construction method Download PDFInfo
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- CN105256683B CN105256683B CN201510574648.4A CN201510574648A CN105256683B CN 105256683 B CN105256683 B CN 105256683B CN 201510574648 A CN201510574648 A CN 201510574648A CN 105256683 B CN105256683 B CN 105256683B
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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 preservation construction side
Method.
Background technology
Frozen soil refers to the soil body and rock with subzero temperature and containing ice, is broadly divided into ever-frozen ground by life span and season freezes
Soil.China's ever-frozen ground area accounts for the 22.4% of area, is third place in the world frozen soil big country.Due to ice and not in frozen soil
Freeze the presence of water, its property is extremely complex and extremely sensitive to temperature.Highway engineering construction and global warming can all cause jelly
The intensification of soil, to roadbed thaw collapse disease, the stability of serious harm Permafrost Area road are brought.
At present, in the Qinghai-Tibet Platean of China, the area such as northeast Xing'anling mountains and Tianshan Mountains, Altai Mountains is tight due to being located in
Cold area, just defines special soil property --- and permafrost, permafrost is generally divided into two-layer：Top is the work for melting winter jelly the summer
Dynamic layer (frost zone), bottom is many annually frozen layers not melted throughout the year.
In cold plateau area road construction, permafrost location is frequently encountered.How road foundation bottom is guaranteed
Permafrost is not destroyed (prevent from melting), it is ensured that the stability of road foundation is that road construction for a long time needs what is solved to ask
Topic.
The content of the invention
It is an object of the invention to provide a kind of permafrost area embankment structure, employs 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 frost zone of above-ground route, fill described packing layer, Slag Layer is simultaneously pressed with heavy road roller
It is real；
The preparation method of described packing layer comprises the steps：Percetage by weight shared by each raw material is：Lime 18-
28%, flyash 25-50%, ardealite 25-35%, waterglass 0.5-1.5%, NaAlO20.1～0.2%, modified acroleic acid
Emulsion 2-15%, pours above-mentioned raw materials into stirrer for mixing and stirs, and obtains packing layer；
Described Slag Layer：Slag Layer is two-layer, is 45-75mm per thickness degree, in the embedded packing layer of lower level floor slag,
Slag particle diameter is less than or equal to 20mm；
(2) pipe-massive stone layer is filled, the granularity of described pipe-massive stone layer is 15-100cm, and filling-up thickness is 50-200cm, whole
It is flat；
(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 fiber concrete layer is poured into a mould；
Described gap-filling cement layer is composed of the following components：Cement：65-100 parts, pulverized limestone：15-28 parts；Flyash：
20-35 parts, steel fibre：25-65 parts, stone：15-35 parts,：Gangue：5-10 parts, diatomite：5-15 parts,：Amino silicone
5-6 parts, acrylic resin：2-4 parts, resorcinol：1-3 parts, aliphatic carboxylic acid triethanolamine salt：0.1-0.5 parts, water 20-90
Part；
Aluminium foil layer：Aluminium foil layer is laid on gap-filling cement layer；
Described thermal resistance conduction cooling layer is at least expandable polystyrene (EPS), polyurethane (PU), injection polystyrene
(XPS) one kind in；
Described fiber concrete layer；It is prepared by the raw materials in：Cement 300-400 parts, river sand 150-200
Part, rubble 300-400 parts, bentonite 60-100 parts, wood fibre 15-20 parts, bamboo fibre 15-20 parts, potassium peroxydisulfate 3-4 parts,
Toluene di-isocyanate(TDI) 10-15 parts, allyl heptanoate 1-5 parts, natrium malicum：1-2 parts, BTA：1-2 parts, hydroxide
Sodium：1-2 parts, steel fibre：5-15 parts, appropriate amount of water；
(4) closely knit embankment filled soil is finally filled.
Further, the preparation method of described packing layer comprises the steps：Percetage by weight shared by each raw material is：Stone
Ash 23%, flyash 42%, ardealite 26%, waterglass 0.6%, NaAlO20.15%, modified acrylic acid emulsion 8.25%.
Further, described Slag Layer：Slag Layer is two-layer, is 50mm per thickness degree, and lower level floor slag is embedded to be filled out
In the bed of material, 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, diatomite：6 parts,：5.5 parts of amino silicone, acrylic acid tree
Fat：3 parts, resorcinol：2 parts, aliphatic carboxylic acid triethanolamine salt：0.35 part, 30 parts of 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, diatomite：12 parts,：6 parts of amino silicone, acrylic resin：
2.7 parts, resorcinol：2.55 parts, aliphatic carboxylic acid triethanolamine salt：0.35 part, 45 parts of water.
Further, aluminium foil layer thickness is 1-5mm.
Further, fiber concrete layer；It is prepared by the raw materials in：360 parts of cement, 160 parts of river sand, rubble
345 parts, 82 parts of bentonite, 18 parts of wood fibre, 16 parts of bamboo fibre, 3.6 parts of potassium peroxydisulfate, 12 parts of toluene di-isocyanate(TDI), heptan
3.4 parts of allyl propionate, natrium malicum：1.6 parts, BTA：1.3 parts, NaOH：1.5 parts, steel fibre：11.2 part,
Appropriate amount of water.
Effect of the invention is that：Permafrost area embankment structure of the present invention, by integrally-built design laying
And the requirement of concrete layers of material, using the heat conduction performance of ventilating of different materials, respective advantage is given full play to, realize cold season
While a large amount of suction cold energy, the caloric receptivity of warm season is effectively limited, roadbed putting only in a freezing and thawing cycle greatly improved
Heat, underlies the temperature of frozen soil so as to more efficiently reduce roadbed.Therefore, this roadbed can protect the jelly for many years under roadbed
Soil, it is to avoid frost heave and thaw collapse occur, improves the safety and stability of road structure, and construction method clearly, can be used as freezing for many years
The basic skills that soil area highway subgrade is built.
Specific embodiment
Embodiment 1
A kind of permafrost area embankment heat insulating construction method, comprises the following steps：
(1) altering fill is excavated
Excavate the following frost zone of above-ground route, fill described packing layer, Slag Layer is simultaneously pressed with heavy road roller
It is real；
The preparation method of described packing layer comprises the steps：Percetage by weight shared by each raw material is：Lime 26%, powder
Coal ash 44%, ardealite 26%, waterglass 0.8%, NaAlO20.15%, modified acrylic acid emulsion 3.05%, by above-mentioned raw materials
Pour stirrer for mixing into stir, obtain packing layer；
Described Slag Layer：Slag Layer is two-layer, is 46mm per thickness degree, in the embedded packing layer of lower level floor slag, steel
Slag particle footpath is less than or equal to 20mm；
(2) pipe-massive stone layer is filled, 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 fiber concrete layer is poured into a mould；
Described gap-filling cement layer is composed of the following components：Cement：78 parts, pulverized limestone：18 parts；Flyash：31 parts, steel is fine
Dimension：42 parts, stone：23 parts,：Gangue：7 parts, diatomite：8 parts,：5.5 parts of amino silicone, acrylic resin：2.8 parts,
Benzenediol：1.9 parts, aliphatic carboxylic acid triethanolamine salt：0.35 part, 30 parts of water；
Aluminium foil layer：Aluminium foil layer is laid on gap-filling cement layer；
Described thermal resistance conduction cooling layer is at least polyurethane and injection polystyrene.
Fiber concrete layer；It is prepared by the raw materials in：It is 325 parts of cement, 186 parts of river sand, 315 parts of rubble, swollen
85 parts of profit soil, 16 parts of wood fibre, 17 parts of bamboo fibre, 3.8 parts of potassium peroxydisulfate, 12.5 parts of toluene di-isocyanate(TDI), enanthic acid allyl
3.6 parts of ester, natrium malicum：1.45 parts, BTA：1.76 parts, NaOH：1.34 parts, steel fibre：5.8 parts, water fit
Amount；
(4) closely knit embankment filled soil is finally filled；
Permafrost area embankment structure includes following structure sheaf after construction：Be followed successively by from top to bottom packing layer, Slag Layer,
Pipe-massive stone layer, gap-filling cement layer, aluminium foil layer, thermal resistance conduction cooling layer, geotechnological layer of cloth, fiber concrete layer, making embankment filled soil layer.
Embodiment 2
A kind of permafrost area embankment heat insulating construction method, comprises the following steps：
(1) altering fill is excavated
Excavate the following frost zone of above-ground route, fill described packing layer, Slag Layer is simultaneously pressed with heavy road roller
It is real；
The preparation method of described packing layer comprises the steps：Percetage by weight shared by each raw material is：Lime 21%, powder
Coal ash 42%, ardealite 28%, waterglass 1.1%, NaAlO20.17%, modified acrylic acid emulsion 7.73%, by above-mentioned raw materials
Pour stirrer for mixing into stir, obtain packing layer；
Described Slag Layer：Slag Layer is two-layer, is 50mm per thickness degree, in the embedded packing layer of lower level floor slag, steel
Slag particle footpath is less than or equal to 20mm；
(2) pipe-massive stone layer is filled, 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 fiber concrete layer is poured into a mould；
Described gap-filling cement layer is composed of the following components：Cement：78 parts, pulverized limestone：22 parts；Flyash：20 parts, steel is fine
Dimension：36 parts, stone：23 parts,：Gangue：7 parts, diatomite：8 parts,：5.5 parts of amino silicone, acrylic resin：2.6 parts,
Benzenediol：2.3 parts, aliphatic carboxylic acid triethanolamine salt：0.33 part, 35 parts of water；
Aluminium foil layer：Aluminium foil layer is laid on gap-filling cement layer；
Described thermal resistance conduction cooling layer is injection polystyrene (XPS)；
Fiber concrete layer；It is prepared by the raw materials in：It is 360 parts of cement, 170 parts of river sand, 320 parts of rubble, swollen
76 parts of profit soil, 17 parts of wood fibre, 19 parts of bamboo fibre, 3.75 parts of potassium peroxydisulfate, 13.2 parts of toluene di-isocyanate(TDI), enanthic acid allyl
3.3 parts of ester, natrium malicum：1.7 parts, BTA：1.65 parts, NaOH：1.4 parts, steel fibre：9.9 parts, appropriate amount of water；
(4) closely knit embankment filled soil is finally filled.
Permafrost area embankment structure includes following structure sheaf after construction：Be followed successively by from top to bottom packing layer, Slag Layer,
Pipe-massive stone layer, gap-filling cement layer, aluminium foil layer, thermal resistance conduction cooling layer, geotechnological layer of cloth, fiber concrete layer, making embankment filled soil layer.
Claims (7)
1. a kind of permafrost area embankment heat insulating construction method, it is characterised in that comprise the following steps：
(1) altering fill is excavated
Excavate the following frost zone of above-ground route, fill packing layer, Slag Layer, and be compacted with heavy road roller；
The preparation method of described packing layer comprises the steps：Percetage by weight shared by each raw material is：Lime 18-28%, powder
Coal ash 25-50%, ardealite 25-35%, waterglass 0.5-1.5%, NaAlO20.1～0.2%, 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, is 45-75mm per thickness degree, in the embedded packing layer of lower level floor slag, slag
Particle diameter is less than or equal to 20mm；
(2) pipe-massive stone layer is filled, 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
Cast fiber concrete layer；
Described gap-filling cement layer is composed of the following components：Cement：65-100 parts, pulverized limestone：15-28 parts, flyash：20-35
Part, steel fibre：25-65 parts, stone：15-35 parts, gangue：5-10 parts, diatomite：5-15 parts, amino silicone：5-6 parts,
Acrylic resin：2-4 parts, resorcinol：1-3 parts, aliphatic carboxylic acid triethanolamine salt：0.1-0.5 parts, water 20-90 parts；
Aluminium foil layer：Aluminium foil layer is laid on gap-filling cement layer；
Described thermal resistance conduction cooling layer is at least in expandable polystyrene (EPS), polyurethane (PU), injection polystyrene (XPS)
One kind；
Described fiber concrete layer；It is prepared by the raw materials in：It is cement 300-400 parts, river sand 150-200 part, broken
Stone 300-400 parts, bentonite 60-100 parts, wood fibre 15-20 parts, bamboo fibre 15-20 parts, potassium peroxydisulfate 3-4 parts, toluene two
Isocyanates 10-15 parts, allyl heptanoate 1-5 parts, natrium malicum：1-2 parts, BTA：1-2 parts, NaOH：1-2
Part, steel fibre：5-15 parts, appropriate amount of water；
(4) closely knit embankment filled soil is finally filled.
2. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised in that：Described packing layer
Preparation method comprises the steps：Percetage by weight shared by each raw material is：Lime 23%, flyash 42%, ardealite 26%, water
Glass 0.6%, NaAlO20.15%, modified acrylic acid emulsion 8.25%.
3. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised in that：Described Slag Layer：
Slag Layer is two-layer, is 50mm per thickness degree, and in the embedded packing layer of lower level floor slag, slag particle diameter is 10-15mm, described
The granularity of pipe-massive stone layer is 55cm.
4. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised 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,：Coal
Spoil：8 parts, diatomite：6 parts,：5.5 parts of amino silicone, acrylic resin：3 parts, resorcinol：2 parts, aliphatic carboxylic acid three
Ethanolamine salt：0.35 part, 30 parts of water.
5. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised 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,：Coal
Spoil：9 parts, diatomite：12 parts,：6 parts of amino silicone, acrylic resin：2.7 parts, resorcinol：2.55 parts, aliphatic carboxylic
Triethylenetetraminehexaacetic acid alcohol amine salt：0.35 part, 45 parts of water.
6. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised in that：Aluminium foil layer thickness is 1-
5mm。
7. permafrost area embankment heat insulating construction method as claimed in claim 1, it is characterised in that：Fiber concrete layer；
It is prepared by the raw materials in：360 parts of cement, 160 parts of river sand, 345 parts of rubble, 82 parts of bentonite, 18 parts of wood fibre,
16 parts of bamboo fibre, 3.6 parts of potassium peroxydisulfate, 12 parts of toluene di-isocyanate(TDI), 3.4 parts of allyl heptanoate, natrium malicum：1.6 parts, benzene
And triazole：1.3 part, NaOH：1.5 parts, steel fibre：11.2 parts, appropriate amount of water.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908587B (en) * | 2016-04-28 | 2018-12-11 | 镇江市高等专科学校 | A kind of Frozen Ground Area roadbed heat insulating construction method |
| CN107326765B (en) * | 2017-08-25 | 2023-03-28 | 中铁西北科学研究院有限公司 | Lime pile for treating island-shaped frozen soil foundation and construction method thereof |
| 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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