CN109024125A - Permafrost area road widening of subgrade construction method - Google Patents
Permafrost area road widening of subgrade construction method Download PDFInfo
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- CN109024125A CN109024125A CN201810991996.5A CN201810991996A CN109024125A CN 109024125 A CN109024125 A CN 109024125A CN 201810991996 A CN201810991996 A CN 201810991996A CN 109024125 A CN109024125 A CN 109024125A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of Permafrost area road widening of subgrade construction methods, construct in spring and summer, dig the step-like construction hole for extending to depth and meeting construction requirement by former shoulder first；The first timber is directly squeezed into hole dolly, expansion space is reserved to cheat the frost heave of bottom frozen soil layer, widening road bed bottom surface and expansion space is separated by TGXG and the first geotextiles；Then it will be successively backfilled in TGXG with the mixed soil of coarse sand, and realize the partially recycled utilization of soil；The bearing capacity that the second timber reinforces soil is then vertically squeezed on the native face of compacting；According still further to step height be successively laid with gravelly soil after be compacted, until the surface of compacting is lower than former road bed 12-15cm；It finally is laid with stone fragment on surface after compaction, is then densified to concordant with the former road bed.It can effectively avoid the frost heave of frozen soil and thaw collapse from influencing the structure of widening road bed, prevent the generation in crack between new-old concrete bond, guarantee the stability of permafrost region roadbed.
Description
Technical field
The present invention relates to road construction field more particularly to a kind of Permafrost area road widening of subgrade construction methods.
Background technique
With the rapid development of Chinese society economy, present most of highway function has been unable to meet society and increasingly increases
Transport need, for this purpose, to original highway carry out upgrading it is imperative.Roadbed Widening is either designed or is applied
Work is all the key that improvement project.Currently, the construction technology widened relative maturity of the China for roadbed, it can be effective
Prevention new-old concrete bond junction generate longitudinal crack the problem of, still, China has a vast territory, and various regions soil property is not quite similar,
Especially for Special geographical positions such as Qinghai-Tibet Plateans, often there is special soil layer, such as frozen soil layer, frozen soil is a kind of right
The extremely sensitive soil medium of temperature, ground ice rich in do not freeze water with the presence of a certain number of in frozen soil.Without ice
Ground is known as dry frozen ground.Therefore, frozen soil has rheological characteristic, and long-term strength is far below instantaneous strength feature.Due to these of frozen soil
Feature, two big danger: frost heave and thaw collapse must just be faced by building engineering structure in permafrost region, and frost heave is the ice cube because of condensation
Very firm, the ice cube of expansion comes up Tu Ding, and forms big Tu Bao, thus carries out highway subgrade to the section containing frozen soil layer
Widen construction have sizable difficulty, there is presently no for Permafrost area road widening of subgrade construction method research.
Summary of the invention
The present invention is directed to the above-mentioned problems in the prior art, provides a kind of Permafrost area road widening of subgrade construction party
Method can effectively avoid the frost heave of frozen soil and thaw collapse from influencing the structure of widening road bed, prevent the production in crack between new-old concrete bond
It is raw, guarantee the stability of permafrost region roadbed.
To achieve the above object with some other purposes, the present invention adopts the following technical scheme:
A kind of Permafrost area road widening of subgrade construction method, mainly comprises the steps that
S1, it position need to be widened to former roadbed in spring and summer measures setting-out, position need to be widened by marking, and by the former road
Base edge to the need marked widen position and dig step-like slope surface step by step downwards, to form the platform by the former shoulder
Scalariform extends to the construction hole that depth meets construction requirement；
S2, it by the soil grab sample dug out and chemically examines, the soil body density for digging out soil is obtained, according to the soil body
Density proportionally mixes the coarse sand that partial size is 1-2mm into the soil dug out；
The soil at the hole bottom that S3, the acquisition construction are cheated is tested as sample, obtains sample sample after frost
The variation of this vertical height；
S4, the first timber is directly squeezed into hole dolly, more first timbers are uniformly distributed at the hole bottom, and make described first
The variation that the distance that timber top protrudes from the surface at the hole bottom is greater than sample vertical height obtained in S3 is identical；
S5, top level two layers of TGXG of laying in first timber；Is laid between two layers of TGXG
One geotextiles；
S6, it will successively be backfilled in the TGXG for being located at upper layer, and reach with the mixed soil of coarse sand in S2
It is compacted when to each rank step height, until reaching the 1/3-1/2 of construction hole depth；
S7, the second timber is vertically squeezed on the native face of S6 compacting, and makes the top surface of the second timber and the native face table of compacting
Face is concordant；
S8, it is compacted after being successively laid with gravelly soil according to the height of step on the native face that S7 squeezes into the second timber, until pressure
Real surface is lower than former road bed 12-15cm；
S9, it is laid with stone fragment on the surface after S8 compacting, be then densified to concordant with the former road bed.
Preferably, in the Permafrost area road widening of subgrade construction method, in the S2, by the soil dug out and slightly
Before sand mixing, also need to dry 3-5d in the sun, and smash to pieces.
Preferably, in the Permafrost area road widening of subgrade construction method, the hole bottom is equipped with flexible
Waterproof cloth offers through-hole on the waterproof cloth, so that first timber passes through the waterproof cloth by the through-hole.
Preferably, in the Permafrost area road widening of subgrade construction method, before the S4, it is located in construction hole
Widen and be also linked with the second geotextiles on the side wall of position side, linked network is fixed with outside second geotextiles.
Preferably, in the Permafrost area road widening of subgrade construction method, in the S3, the sample is obtained in ice
The method of the variation of sample vertical height after jelly are as follows:
Sample is placed in the only experiment container of opened upper end, the soil packing degree at the hole bottom is measured,
With by the compactness of the sample in the experiment container adjust to hole the compactness of subsoil earth it is identical, by the sample at 0 DEG C
It is freezed in following environment, and height of the measurement sample in experiment container exists after sample frost to get to the sample
The variation of sample vertical height after frost.
Preferably, in the Permafrost area road widening of subgrade construction method, in the S5, it is being located at described in upper layer
Concrete is perfused in TGXG.
Preferably, in the Permafrost area road widening of subgrade construction method, support is provided on first timber
Mechanism；The supporting mechanism includes fixed ring and supporting leg；The fixed ring is with can be along the side walls of first timber
Mode is set on first timber, and the supporting leg is set as 3-5 root；The evenly spaced fixation in the top of the supporting leg
It is connected on the outer wall of the fixed ring, bottom end is tilted to the direction far from the fixed ring, to be formed using fixed ring as top surface
Tower-like support frame；The supporting leg is scalable setting, and in no external force, is in elongation state, and is made described
The height of support frame and first timber top protrude from it is identical at a distance from the surface at the hole bottom, and the supporting leg by
When to external force extrusion, the limiting length of contraction is the variation length of sample vertical height obtained in S3.
The present invention is include at least the following beneficial effects:
In Permafrost area road widening of subgrade construction method of the invention, the construction of roadbed is carried out in spring and summer, it can
So that the soil property of permafrost region is in thaw collapse state, the sinking of new roadbed caused by constructing under frost heave state is avoided；By to hole
The experiment of subsoil earth determines the frozen-heave coefficient of hole subsoil earth, and then the first timber is arranged at hole bottom, so that the roadbed widened and hole
The frost heave soil layer at bottom maintains a certain distance, and has reserved enough frost heave spaces to the frozen soil at hole bottom, has avoided new roadbed in temperature
Frost heave of frozen soil jacks up new roadbed when lower, causes the longitudinal crack between new-old concrete bond；By to dig out soil chemical examination after go forward side by side
The corresponding processing of row reuses the soil dug out in widening of subgrade construction, saves the cost of construction；
TGXG is set on the first timber, and is laid with the first geotextiles between TGXG, can be avoided the material of widening road bed by
The gap of TGXG enters in the frost heave space of reserved frozen soil layer, and the setting of two layers of TGXG can be reinforced widening road
The bearing capacity of base in vertical direction digs out the layer-by-layer backfill of soil and compacting and the layer-by-layer laying of gravelly soil and is compacted, makes
The compactness for obtaining roadbed is effectively improved, and in the case where compactness improves, the settling amount of roadbed is also just further decreased,
The stability that widening road bed can further be increased, reduces the settling amount of widening road bed；Second timber is squeezed into, can be into one
Step enhancing widening road bed resists the bearing capacity of the pressure from road surface, reduces settling amount；By that will construct, hole is dug in step-like,
So that having layer-by-layer engaging portion between new-old concrete bond, the anti-shear ability of coupling section of the new and old road is increased, new roadbed is prevented
The destruction to old road base is settled, to achieve the effect that stable new-old concrete bond differential settlement, so that the structure of new roadbed is more
It is firm.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of widening of subgrade construction method in Permafrost area road provided by the invention；
Fig. 2 is the structural schematic diagram of supporting mechanism provided by the invention.
Specific embodiment
It elaborates with reference to the accompanying drawing to the present invention, to enable those of ordinary skill in the art refering to energy after this specification
It is enough to implement accordingly.
As shown in Figure 1, a kind of Permafrost area road widening of subgrade construction method, mainly comprises the steps that
S1, it position need to be widened to former roadbed 7 in spring and summer measures setting-out, position need to be widened by marking, and by the original
7 edge of roadbed to the need marked widen position and dig step-like slope surface step by step downwards, are opened with being formed by 7 edge of the former roadbed
Begin it is step-like extend to depth meet construction requirement construction hole 1；
S2, it by the soil grab sample dug out and chemically examines, the soil body density for digging out soil is obtained, according to the soil body
Density proportionally mixes the coarse sand that partial size is 1-2mm into the soil dug out；
The soil at the hole bottom that S3, the acquisition construction cheat 1 is tested as sample, obtains sample sample after frost
The variation of this vertical height；
S4, the first timber 2 is directly squeezed into hole dolly, more first timbers 2 are uniformly distributed at the hole bottom, and make described the
The variation that the distance that one timber, 2 top protrudes from the surface at the hole bottom is greater than sample vertical height obtained in S3 is identical；
S5, top level two layers of TGXG 3 of laying in first timber 2；It is laid between two layers of TGXG 3
First geotextiles 4；
S6, it will successively be backfilled in the TGXG 3 for being located at upper layer, and reach with the mixed soil of coarse sand in S2
It is compacted when to each rank step height, until reaching the 1/3-1/2 of 1 depth of the construction hole；
S7, the second timber 5 is vertically squeezed on the native face of S6 compacting, and makes the top surface of the second timber 5 and the native face of compacting
Flush；
S8, the height on the native face that S7 squeezes into the second timber 5 according to step are compacted after being successively laid with gravelly soil 6, until
The surface of compacting is lower than 7 surface 12-15cm of former roadbed；
S9, it is laid with stone fragment 8 on the surface after S8 compacting, be then densified to and 7 flush of the former roadbed.
In the above scheme, the construction that roadbed is carried out in spring and summer, enables to the soil property of permafrost region to be in thaw collapse
State avoids the sinking of new roadbed caused by constructing under frost heave state；By the experiment to hole subsoil earth, hole subsoil earth is determined
Frozen-heave coefficient, and then the first timber is set at hole bottom so that the roadbed widened and the frost heave soil layer at hole bottom keep it is certain away from
From, reserved enough frost heave spaces to the frozen soil at hole bottom, avoid new roadbed when temperature is lower Frost heave of frozen soil by new roadbed top
It rises, causes the longitudinal crack between new-old concrete bond；By to dig out soil chemical examination after and perform corresponding processing so that the mud dug out
Soil can be reused when widening of subgrade is constructed, and save the cost of construction；TGXG is set on the first timber, and
The first geotextiles are laid between TGXG, the material that can be avoided widening road bed enters reserved jelly by the gap of TGXG
In the frost heave space of soil layer, and the setting of two layers of TGXG can reinforce the bearing capacity of widening road bed in vertical direction, dig
The layer-by-layer backfill and compacting of soil and the layer-by-layer laying and compacting of gravelly soil out, so that the compactness of roadbed is effectively mentioned
Height, in the case where compactness improves, the settling amount of roadbed is also just further decreased, and can further increase widening road bed
Stability reduces the settling amount of widening road bed；Second timber is squeezed into, and can be further enhanced widening road bed and be resisted from road surface
Pressure bearing capacity, reduce settling amount；By that will construct, hole is dug in step-like, so that having layer-by-layer knot between new-old concrete bond
Conjunction portion increases the anti-shear ability of coupling section of the new and old road, destruction of the sedimentation of new roadbed to old road base is prevented, to reach
Stablize the effect of new-old concrete bond differential settlement, so that the structure of new roadbed is more firm.
In one preferred embodiment, in the S2, before the soil dug out is mixed with coarse sand, also need to dry 3- in the sun
5d, and smash to pieces.
In the above scheme, by first drying the soil dug out in the sun, containing in soil can effectively be reduced
Water, at the same it is more uniform with the mixing of coarse sand after smashing to pieces, granulometric composition is carried out by the reduction and coarse sand of water content
Change, to avoid the possibility of the soil dug out generation frost heave in recycling.The adding proportion of its medium coarse sand is according to digging out
The experimental data of soil is added, to achieve the purpose that change soil granularity.
In one preferred embodiment, the hole bottom is equipped with flexible waterproof cloth 9, offers on the waterproof cloth 9 logical
Hole, so that first timber 2 passes through the waterproof cloth 9 by the through-hole.
In the above scheme, by cheating the laying of bottom waterproof cloth, the moisture that can be avoided hole bottom frozen soil layer oozes out upwards, together
When frozen soil layer frost heave expansion after, the direct contact of frozen soil layer and upper layer widening road bed is avoided, to improve widening road bed
Stability.
In one preferred embodiment, before the S4, it is located on the side wall for widening position side in the construction hole 1 and is also linked with the
Two geotextiles 10, second geotextiles 10 are fixed with linked network 11 outside.
In the above scheme, by the laying of the second geotextiles, avoid the frozen soil of the frozen soil layer of construction hole side to widening
Base course is mobile, to avoid influence of the frozen soil layer moisture to widening road bed structure, and linked network can play strengthening construction hole and
The effect of second geotextiles.
In one preferred embodiment, in the S3, the method that obtains sample variation of sample vertical height after frost
Are as follows: sample is placed in the only experiment container of opened upper end, the soil packing degree at the hole bottom is measured, by institute
State the sample in experiment container compactness adjust to hole the compactness of subsoil earth it is identical, by the sample in 0 DEG C or less ring
It is freezed in border, and measures height of the sample in experiment container after sample frost to get the sample is arrived after frost
The variation of sample vertical height.
In the above scheme, by the practical compactness of measurement hole subsoil earth, and the compactness of the sample of sample is adjusted
It is extremely identical as the hole practical compactness of subsoil earth, enable to experimental result more accurate, thus applying the first wood of utilization of hour
There are enough frozen soil layer frost heaves spaces between hole bottom and widening road bed bottom surface for stake.
In one preferred embodiment, in the S5, concrete 12 is perfused in the TGXG 3 for being located at upper layer.
In the above scheme, by the perfusion of concrete in TGXG, TGXG and hole bottom can further be reinforced
Isolation, and geotextiles and TGXG are closely linked using concrete, enhance the stability of widening road bed.
As shown in Fig. 2, being provided with supporting mechanism 15 on first timber 2 in a preferred embodiment；The supporting mechanism
15 include fixed ring 13 and supporting leg 14；The fixed ring 13 in a manner of the side walls of first timber 2 can be arranged
On first timber 2, the supporting leg 14 is set as 3-5 root；The evenly spaced fixation in the top of the supporting leg 14 is even
It is connected on the outer wall of the fixed ring 13, bottom end is tilted to the direction far from the fixed ring 13, is with fixed ring 13 to be formed
The tower-like support frame of top surface；The supporting leg 14 is scalable setting, and in no external force, is in elongation state, and
Keep the height of support frame as described above identical at a distance from the surface that 2 top of the first timber protrudes from the hole bottom, and the branch
For support leg 14 when by external force extrusion, the limiting length of contraction is the variation length of sample vertical height obtained in S3.
In the above scheme, by the setting of retractable support frame, enable support frame above roadbed occur it is heavy
Good supporting role is played when drop, reduces the settling amount of roadbed, simultaneously, moreover it is possible to when cheating bottom frozen soil layer generation frost heave, isolation
Frozen soil layer and widening road bed.Wherein the stretching structure of supporting leg is that two hollow rod bodies are mutually arranged, and are provided with being arranged end
Spring, so that when being squeezed, spring contraction, supporting leg shorten in the internal layer body of rod, and when external force disappears, spring deformation disappears
It loses, supporting leg extends again.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and the legend herein shown with description.
Claims (7)
1. a kind of Permafrost area road widening of subgrade construction method, wherein mainly comprise the steps that
S1, it position need to be widened to former roadbed in spring and summer measures setting-out, position need to be widened by marking, and by the former roadbed side
Edge to the need marked widen position and dig step-like slope surface step by step downwards, step-like by the former shoulder to be formed
Extend to the construction hole that depth meets construction requirement；
S2, it by the soil grab sample dug out and chemically examines, the soil body density for digging out soil is obtained, according to the soil body density
The coarse sand that partial size is 1-2mm is proportionally mixed into the soil dug out；
The soil at the hole bottom that S3, the acquisition construction are cheated is tested as sample, is obtained sample sample after frost and is hung down
The variation of straight height；
S4, the first timber is directly squeezed into hole dolly, more first timbers are uniformly distributed at the hole bottom, and make first timber
The variation that the distance that top protrudes from the surface at the hole bottom is greater than sample vertical height obtained in S3 is identical；
S5, top level two layers of TGXG of laying in first timber；The first soil is laid between two layers of TGXG
Work cloth；
S6, it will be successively backfilled in S2 with the mixed soil of coarse sand in the TGXG for being located at upper layer, and each reaching
It is compacted when rank step height, until reaching the 1/3-1/2 of construction hole depth；
S7, the second timber is vertically squeezed on the native face of S6 compacting, and puts down the top surface of the second timber and the native face surface of compacting
Together；
S8, it is compacted after being successively laid with gravelly soil according to the height of step on the native face that S7 squeezes into the second timber, until compacting
Surface is lower than former road bed 12-15cm；
S9, it is laid with stone fragment on the surface after S8 compacting, be then densified to concordant with the former road bed.
2. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein in the S2, the soil that will dig out
Before mixing with coarse sand, also need to dry 3-5d in the sun, and smash to pieces.
3. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein the hole bottom, which is equipped with, has elasticity
Waterproof cloth, through-hole is offered on the waterproof cloth, so that first timber passes through the waterproof cloth by the through-hole.
4. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein before the S4, cheated in the construction
It is also linked with the second geotextiles on the side wall for widening position side, linked network is fixed with outside second geotextiles.
5. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein in the S3, obtain the sample
The method of the variation of sample vertical height after frost are as follows:
Sample is placed in the only experiment container of opened upper end, the soil packing degree at the hole bottom is measured, it will
The compactness of sample in the experiment container adjust to hole the compactness of subsoil earth it is identical, by the sample at 0 DEG C or less
It is freezed in environment, and height of the measurement sample in experiment container is freezing after sample frost to get to the sample
The variation of sample vertical height afterwards.
6. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein in the S5, be located at upper layer
Concrete is perfused in the TGXG.
7. widening of subgrade construction method in Permafrost area road as described in claim 1, wherein be provided with branch on first timber
Support mechanism；The supporting mechanism includes fixed ring and supporting leg；The fixed ring is with can be along the side walls of first timber
Mode be set on first timber, the supporting leg is set as 3-5 root；The top of the supporting leg is evenly spaced solid
Surely it is connected on the outer wall of the fixed ring, bottom end is tilted to the direction far from the fixed ring, to be formed with fixed ring as top
The tower-like support frame in face；The supporting leg is scalable setting, and in no external force, is in elongation state, and make institute
The height for stating support frame is identical at a distance from the surface that first timber top protrudes from the hole bottom, and the supporting leg exists
When by external force extrusion, the limiting length of contraction is the variation length of sample vertical height obtained in S3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810991996.5A CN109024125B (en) | 2018-08-29 | 2018-08-29 | Construction method for widening highway subgrade in frozen soil area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810991996.5A CN109024125B (en) | 2018-08-29 | 2018-08-29 | Construction method for widening highway subgrade in frozen soil area |
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| CN109024125B CN109024125B (en) | 2020-11-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820576A (en) * | 2019-11-14 | 2020-02-21 | 李诺 | Intelligent reinforced type frozen soil road section highway bridge construction support frame and construction method thereof |
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| JP2005042320A (en) * | 2003-07-23 | 2005-02-17 | Kaneka Corp | Widening fill structure |
| CN101419221A (en) * | 2007-10-23 | 2009-04-29 | 中铁第一勘察设计院集团有限公司 | Computation method for frost heaving characteristic for deep seasonal frozen ground subgrade |
| CN204266075U (en) * | 2014-11-20 | 2015-04-15 | 青海富腾生态科技有限公司 | The antifreeze base fabric structure of a kind of frozen earth roadbed waterproof |
| CN106522055A (en) * | 2016-11-09 | 2017-03-22 | 郭昆朋 | Construction method of widening roadbed of road |
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2018
- 2018-08-29 CN CN201810991996.5A patent/CN109024125B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005042320A (en) * | 2003-07-23 | 2005-02-17 | Kaneka Corp | Widening fill structure |
| CN101419221A (en) * | 2007-10-23 | 2009-04-29 | 中铁第一勘察设计院集团有限公司 | Computation method for frost heaving characteristic for deep seasonal frozen ground subgrade |
| CN204266075U (en) * | 2014-11-20 | 2015-04-15 | 青海富腾生态科技有限公司 | The antifreeze base fabric structure of a kind of frozen earth roadbed waterproof |
| CN106522055A (en) * | 2016-11-09 | 2017-03-22 | 郭昆朋 | Construction method of widening roadbed of road |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820576A (en) * | 2019-11-14 | 2020-02-21 | 李诺 | Intelligent reinforced type frozen soil road section highway bridge construction support frame and construction method thereof |
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| CN109024125B (en) | 2020-11-24 |
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