CN109811748A - A kind of express highway roadbed processing method in Frozen Ground Area - Google Patents
A kind of express highway roadbed processing method in Frozen Ground Area Download PDFInfo
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- CN109811748A CN109811748A CN201910018415.4A CN201910018415A CN109811748A CN 109811748 A CN109811748 A CN 109811748A CN 201910018415 A CN201910018415 A CN 201910018415A CN 109811748 A CN109811748 A CN 109811748A
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Abstract
The invention discloses a kind of express highway roadbed processing methods in Frozen Ground Area, comprising the following steps: a. melts frozen earth roadbed in frost line in advance；B. excavate and all melt soil；C. layer bottom one layer of coarse-grained soil of laying and loaded filter are being excavated, while is being laid with dirt water barrier in two sides and leads swollen layer with gravel；D. successively filling activated magnesia carbonization curing sludge soil and ground tamping；E. closely knit railway embankment bankets and in one layer arranged below of the pavement structure coarse granule soil layer comprising XPS insulation board；F. water proof spats is respectively set in embankment two sides.The present invention sufficiently combines Frozen Ground Area roadbed and melts in advance, changes and fill out processing and weak soil carbonization curing technology, it effectively strengthens frozen earth roadbed, subgrade soils are avoided well returns the engineering problems such as jelly and frost heave, it further reduced settlement of subgrade, largely reduce the secondary disease problem of cold area's highway.The method has that economic and environment-friendly, safe and efficient, controllability is strong, the advantages such as easy to operate.
Description
Technical field
The present invention relates to geotechnical engineerings, field of road, and in particular to a kind of express highway roadbed processing in Frozen Ground Area
Method.
Background technique
China occupies the whole world the third-largest frozen soil country, and ever-frozen ground area accounts for about the 22.3% of national territorial area, and season
Property frozen soil area accounts for about 53.5%；Cold area's frozen soil is to occupy " half of the country " of China's national territorial area, to China's traffic base
Plinth construction, which causes, to be significantly affected.In recent years, with cold area's expanding economy, Frozen Ground Area traffic and infrastructure construction are wanted
It asks and is gradually increased, railway and common road gauze can not carry existing freight volume；It meanwhile being protection " Qinghai-Tibet Platean " etc.
The precious and fragile ecosphere, reduction artificial destruction as far as possible, closed highway is optimal selection.However, Frozen Ground Area
Expressway construction belongs to world-famous puzzle, compares common road, and width of roadway increases, and caloric receptivity is substantially increased, thermal resistance effect
It is badly damaged, technology content is multiplied, and express highway roadbed stability receives huge challenge, exposes severe highway
Transportation safety and later period problems of operation.
The common frost heave protuberance of highway, thaw collapse and the frost boiling sick harmful problem of grade；It is climate variation at all
Or human interference causes frozen earth roadbed temperature change that frozen soil bound is caused to fluctuate.Existing design principle is mainly arranged using heat preservation
It applies, limited using thermal insulation or Upper Limit of Permafrost is delayed to move down, thus protection of permafrost.But the technology is still immature at present,
Fail to change the development trend for covering frozen soil hot revenue and expenditure under roadbed, roadbed freeze-harm problem can not be eliminated from the root.Therefore, Yi Xiete
Different road structure is used, such as hot pin, ventilation duct, tile stone, thermal insulation layer typical structure.These processing methods are directed to jelly mostly
Soil area has second level and with rectification and the disease management of getting down the highway, and mainly around " highway distress improvement ", rather than " highway distress is pre-
It is anti-".This also has ignored the interaction performance of national highway net endogenous cold area frozen soil environment, later period military service performance and runs the service life and asks
Topic etc..Therefore, it can effectively prevent " cold area's frozen soil disease problem ", solve the problems, such as cold area's roadbed freeze-harm from the root and can guarantee
The processing technique of the express highway roadbed stability in Frozen Ground Area is left to be desired.
Cushion easy construction, it is applied widely, but be difficult to eliminate or reasonable control of subgrade frost-heaving deformation, and need to be in whole
Or change in the depth of freezing of part filling out, it is more demanding to filler.Coarse granule is used frequently as frozen earth roadbed filler, but practical work
Journey shows it only and can be reduced subgrade soils frost heave, while being likely to occur water translocation；After multigelation, coarse granule filler water content
It will increase, so that inducing roadbed occurs the diseases such as frost heave, frost boiling, cracking, depression, one will be constituted to highway durability and stability
Fixed threat.Therefore, improvement roadbed filling is inexorable trend, i.e., by the common roadbed filling improvement in Frozen Ground Area for low aqueous
Rate and non-heave susceptibility material.The marshland of large area is distributed in the Northeast, China, Crack cause is local climate
Clammy, frozen soil development, the low equality of topography.Frozen Ground Area marshland is mainly made of peat soil and silt soil, its main feature is that soil property
It is loose, moisture content is high, intensity is low, hardness is low, therefore cannot function as roadbed filling.How the mud of marshland is efficiently used
Charcoal soil and silt soil sufficiently realize that resource utilization and " turning waste into wealth " are that current geotechnical engineers engineering urgently to be resolved is difficult
Topic.
Summary of the invention
Technical problem: the object of the present invention is to provide a kind of express highway roadbed processing methods in Frozen Ground Area, freeze to overcome
The deficiency and defect of the express highway roadbed processing method in soil area, while in order to effectively solve Frozen Ground Area marshland recycling benefit
With problem, synthesis proposes that one kind can be used for the express highway roadbed processing method in Frozen Ground Area, significantly improves roadbed filling, realizes public
Road prevention of damage by disease limits subgrade soils problem of frost heave from the root, improves subgrade stability and durability, enhances cold area's frozen soil high speed
Highway military service performance.
Technical solution: the express highway roadbed processing method in a kind of Frozen Ground Area of the invention, which includes following
Step:
A. according to roadbed exploration report, cold area's roadbed frost line is determined；Melted in advance according to the depth of freezing, field condition selection
Method melts the roadbed frozen soil of frost line or more, i.e. all frozen soil in the excavation region of coarse-particle bed to earth's surface range in advance；
B. frozen soil all in tabetisol are excavated, and transports to storing place；
C. one layer of bottom coarse-grained soil of layer bottom laying is being excavated, is then being laid with one layer of loaded filter；Excavating region simultaneously
Two sides are laid with water barrier and lead swollen layer；
D. the cured silt soil of layer-by-layer wadding warp activated magnesia carbonization or peat soil, and ground tamping；
E. closely knit railway embankment is banketed and is filled in one layer arranged below of the pavement structure coarse-grained soil comprising XPS thermal insulation layer
Layer；
F. water proof spats is set in embankment two sides respectively.
Wherein,
It is described it is pre- melt roadbed frozen soil in frost line, select winter construction.
It is described to excavate frozen soil all in tabetisol, it is continuously to excavate to melt soil round the clock after frozen soil thawing, it is corresponding to excavate region
The ratio of slope is 1:0.5~1.
Described to excavate one layer of bottom coarse-grained soil of layer bottom laying, filling height is not less than 50cm.
The loaded filter divides three layers of laying by the sequence of partial size from big to small using cobble, rubble and sand filler.
It is described to excavate the laying of region two sides water barrier, embankment soil two sides water proof spats, it is right using spice lime and clay
Answer volume ratio control in 3~4:6~7, laying depth is 30~50cm；The slope foot ratio of embankment soil two sides water proof spats be 1:3~
5。
Described to lead swollen layer using sand gravel filling, laying depth is 30~50cm.
The cured silt soil of the carbonization or peat soil, grain diameter control within the scope of 1cm~5cm, small with partial size, fill out
Filling the high particle of compactness is advisable.
The layer-by-layer wadding warp activated magnesia is carbonized cured silt soil or peat soil, and a filling height is 50~
100cm is filled next time again after guaranteeing sufficiently compacting.
The XPS thermal insulation layer, using the single layer thermal insulation board fissure of displacement splice, heat-insulated board size be used uniformly 200cm × 100cm ×
5cm；When embankment soil is filled to 80~100cm below Pavement Structure Design absolute altitude, road surface is flattened, coarse-grained soil is filled and fills
Layer, filling height are not less than 50cm, fill one layer of XPS thermal insulation layer of laying in the middle part of layer in coarse-grained soil.
The utility model has the advantages that the present invention sufficiently combines and traditional, simple, easy pre- melts method, exchange filling method and novel active
Magnesia carbonization curing technology, by improving roadbed filling, synthesis solves Frozen Ground Area marshland resource utilization and Han Qu
The problems such as express highway roadbed processing is difficult.Because carbonisation constantly consumes carbon dioxide, therefore there is important environmental protection
Meaning.In addition, cured silt soil or peat soil filler and assist setting water barrier using being carbonized, lead swollen layer and insulation board, it can
Subgrade soils frost heave and thaw collapse are effectively avoided, highway distress prevention is realized, limits subgrade soils problem of frost heave from the root, improve roadbed
Stability and durability directly enhance cold area's frozen soil highway military service performance.
Detailed description of the invention
Fig. 1 is a kind of express highway roadbed processing method schematic diagram in Frozen Ground Area；
In figure, be carbonized cured silt soil or peat soil 1, water barrier 2, leads swollen layer 3, loaded filter 4, bottom coarse-grained soil 5,
Water proof spats 6, coarse-grained soil fill layer 7, XPS thermal insulation layer 8, pavement structure 9, embankment filled soil 10, frost line 11.
Specific embodiment
Technical solution of the present invention is described in detail below, but protection scope of the present invention is not limited to the implementation
Example.
Embodiment 1:
A kind of cold express highway roadbed processing method of area's frozen soil, as shown in Figure 1.It is characterized by composing the following steps:
A. cold area's roadbed frost line is determined according to roadbed exploration report first；It is chosen according to the depth of freezing, field condition etc.
Suitable method is selected winter construction, is preferentially melted the roadbed frozen soil of 11 or more frost line in advance using electrothermal way or steaming process, i.e., slightly
All frozen soil in stratum granulosum 5 to the excavation region of earth's surface range.
B. frozen soil all in tabetisol are excavated using excavator, and soil transport will be melted to storing place using muck haulage vehicle, correspond to
The excavation gradient is 1:0.5；Shoveling work should continuously excavate round the clock after frozen soil thawing melts soil, avoids freezing again.
C. excavate layer bottom be laid with bottom coarse-grained soil 5, filling height 50cm, then use cobble, rubble and
Sand filler divides three layers of laying loaded filter 4 by the sequence of partial size from big to small；Region two sides are being excavated along excavation face laying ash simultaneously
Native water barrier 2 leads swollen layer 3 with gravel, and wherein the lime in dirt spice and clay volume ratio are 3:7；Water barrier 2 and lead swollen layer 3
Laying depth is 30cm.
D. silt soil or peat soil particle 1 after layer-by-layer wadding warp carbonization solidifies, carbonized stock are derived from Frozen Ground Area marsh
Area, carbonization solidify the grain diameter control of manufacture in 1cm-5cm or so, and particle small with partial size, that filling compactness is high is advisable；
Each packed height is 50cm, is filled next time after sufficiently tamping, and circulate operation is until roadbed filling terminates.
E. closely knit railway embankment bankets 10, and starts to flatten road surface at 9 or less 100cm of pavement structure and fill coarse granule
Soil fills layer 7, filling height 70cm, and fills one layer of XPS thermal insulation layer 8 of setting among layer 7 in coarse-grained soil；XPS is heat-insulated
Layer 8 is spliced by the insulation board fissure of displacement having a size of 200 × 100 × 5cm.
F. dirt water proof spats 6 is set in embankment two sides respectively, dirt spice lime and clay volume ratio are also 3.5:
6.5；6 ratio of slope of dirt water proof spats is 1:3.
Embodiment 2:
A kind of cold express highway roadbed processing method of area's frozen soil, as shown in Figure 1.It is characterized by composing the following steps:
A. cold area's roadbed frost line is determined according to roadbed exploration report first；It is chosen according to the depth of freezing, field condition etc.
Suitable method is selected winter construction, is preferentially melted the roadbed frozen soil of 11 or more frost line in advance using electrothermal way or steaming process, i.e., slightly
All frozen soil in stratum granulosum 5 to the excavation region of earth's surface range.
B. frozen soil all in tabetisol are excavated using excavator, and soil transport will be melted to storing place using muck haulage vehicle, correspond to
The excavation gradient is 1:0.75；Shoveling work should continuously excavate round the clock after frozen soil thawing melts soil, avoids freezing again.
C. excavate layer bottom be laid with bottom coarse-grained soil 5, filling height 75cm, then use cobble, rubble and
Sand filler divides three layers of laying loaded filter 4 by the sequence of partial size from big to small；Region two sides are being excavated along excavation face laying ash simultaneously
Native water barrier 2 leads swollen layer 3 with gravel, and wherein the lime in dirt spice and clay volume ratio are 3.5:6.5；Water barrier 2 with lead
Swollen 3 laying depth of layer is 40cm.
D. silt soil or peat soil particle 1 after layer-by-layer wadding warp carbonization solidifies, carbonized stock are derived from Frozen Ground Area marsh
Area, carbonization solidify the grain diameter control of manufacture in 1cm-5cm or so, and particle small with partial size, that filling compactness is high is advisable；
Each packed height is 75cm, is filled next time after sufficiently tamping, and circulate operation is until roadbed filling terminates.
E. closely knit railway embankment bankets 10, and starts to flatten road surface at 9 or less 90cm of pavement structure and fill coarse granule
Soil fills layer 7, filling height 60cm, and fills one layer of XPS thermal insulation layer 8 of setting among layer 7 in coarse-grained soil；XPS is heat-insulated
Layer 8 is spliced by the insulation board fissure of displacement having a size of 200 × 100 × 5cm.
F. dirt water proof spats 6 is set in embankment two sides respectively, dirt spice lime and clay volume ratio are also 3:7；Ash
Native 6 ratio of slope of water proof spats is 1:4.
Embodiment 3:
A kind of cold express highway roadbed processing method of area's frozen soil, as shown in Figure 1.It is characterized by composing the following steps:
A. cold area's roadbed frost line is determined according to roadbed exploration report first；It is chosen according to the depth of freezing, field condition etc.
Suitable method is selected winter construction, is preferentially melted the roadbed frozen soil of 11 or more frost line in advance using electrothermal way or steaming process, i.e., slightly
All frozen soil in stratum granulosum 5 to the excavation region of earth's surface range.
B. frozen soil all in tabetisol are excavated using excavator, and soil transport will be melted to storing place using muck haulage vehicle, correspond to
The excavation gradient is 1:1；Shoveling work should continuously excavate round the clock after frozen soil thawing melts soil, avoids freezing again.
C. excavate layer bottom be laid with bottom coarse-grained soil 5, filling height 100cm, then use cobble, rubble and
Sand filler divides three layers of laying loaded filter 4 by the sequence of partial size from big to small；Region two sides are being excavated along excavation face laying ash simultaneously
Native water barrier 2 leads swollen layer 3 with gravel, and wherein the lime in dirt spice and clay volume ratio are 4:6；Water barrier 2 and lead swollen layer 3
Laying depth is 50cm.
D. silt soil or peat soil particle 1 after layer-by-layer wadding warp carbonization solidifies, carbonized stock are derived from Frozen Ground Area marsh
Area, carbonization solidify the grain diameter control of manufacture in 1cm-5cm or so, and particle small with partial size, that filling compactness is high is advisable；
Each packed height is 100cm, is filled next time after sufficiently tamping, and circulate operation is until roadbed filling terminates.
E. closely knit railway embankment bankets 10, and starts to flatten road surface at 9 or less 80cm of pavement structure and fill coarse granule
Soil fills layer 7, filling height 50cm, and fills one layer of XPS thermal insulation layer 8 of setting among layer 7 in coarse-grained soil；XPS is heat-insulated
Layer 8 is spliced by the insulation board fissure of displacement having a size of 200 × 100 × 5cm.
F. dirt water proof spats 6 is set in embankment two sides respectively, dirt spice lime and clay volume ratio are also 4:6；Ash
Native 6 ratio of slope of water proof spats is 1:5.
It is noted that the above is only a preferred embodiment of the present invention；For the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of express highway roadbed processing method in Frozen Ground Area, which is characterized in that the processing method includes the following steps:
A. according to roadbed exploration report, cold area's roadbed frost line is determined；The side melted in advance is chosen according to the depth of freezing, field condition
Method melts the roadbed frozen soil of frost line (11) or more, i.e. all frozen soil in the excavation region of coarse-particle bed (5) to earth's surface range in advance；
B. frozen soil all in tabetisol are excavated, and transports to storing place；
C. one layer of bottom coarse-grained soil (5) of layer bottom laying is being excavated, is then being laid with one layer of loaded filter (4)；Simultaneously in excavation area
Domain two sides are laid with water barrier (2) and lead swollen layer (3)；
D. the cured silt soil of layer-by-layer wadding warp activated magnesia carbonization or peat soil (1), and ground tamping；
E. closely knit railway embankment bankets (10) and in one layer arranged below of pavement structure (9) coarse granule comprising XPS thermal insulation layer (8)
Soil fills layer (7)；
F. water proof spats (6) are set in embankment two sides respectively.
2. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that described pre- to melt
Roadbed frozen soil in frost line selects winter construction.
3. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that described to melt
All frozen soil are excavated in area, are continuously to excavate to melt soil round the clock after frozen soil thawing, and the corresponding region ratio of slope of excavating is 1:0.5~1.
4. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that described to open
It digs layer bottom and is laid with one layer of bottom coarse-grained soil (5), filling height is not less than 50cm.
5. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that the anti-filter
Layer (4) divides three layers of laying by the sequence of partial size from big to small using cobble, rubble and sand filler.
6. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that described to open
It digs region two sides and is laid with water barrier (2), embankment soil two sides water proof spats (6), using spice lime and clay, corresponding volume is than control
For system in 3~4:6~7, laying depth is 30~50cm；The slope foot ratio of embankment soil two sides water proof spats (6) is 1:3~5.
7. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that it is described lead it is swollen
Layer (3) is filled using sand gravel, and laying depth is 30~50cm.
8. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that the carbonization
Cured silt soil or peat soil (1), grain diameter control within the scope of 1cm~5cm, it is small with partial size, filling compactness it is high
Particle is advisable.
9. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that described layer-by-layer
The cured silt soil of wadding warp activated magnesia carbonization or peat soil (1), a filling height are 50~100cm, are guaranteed abundant
It is filled next time again after compacting.
10. the express highway roadbed processing method in a kind of Frozen Ground Area according to claim 1, which is characterized in that the XPS
Thermal insulation layer (8), is spliced using the single layer thermal insulation board fissure of displacement, and heat-insulated board size is used uniformly 200cm × 100cm × 5cm；When embankment soil
(10) when filling to 80~100cm below pavement structure (9) designed elevation, road surface is flattened, coarse-grained soil is filled and fills layer (7),
Filling height is not less than 50cm, fills in coarse-grained soil and is laid with one layer of XPS thermal insulation layer (8) in the middle part of layer (7).
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| CN112921726A (en) * | 2021-01-28 | 2021-06-08 | 长安大学 | Roadbed structure capable of preventing roadbed soil from being dry cracked or wet sunk and construction method thereof |
| CN115029976A (en) * | 2022-06-15 | 2022-09-09 | 江苏交水建智能装备研究院有限公司 | Roadbed coverage effect combined prevention and control method based on soil body solidification and partition technology |
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