CN104631255B - A kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual - Google Patents
A kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual Download PDFInfo
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- CN104631255B CN104631255B CN201510020658.3A CN201510020658A CN104631255B CN 104631255 B CN104631255 B CN 104631255B CN 201510020658 A CN201510020658 A CN 201510020658A CN 104631255 B CN104631255 B CN 104631255B
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- 239000004568 cement Substances 0.000 title claims abstract description 66
- 238000010276 construction Methods 0.000 title claims abstract description 49
- 239000000835 fiber Substances 0.000 title claims abstract description 47
- 239000010438 granite Substances 0.000 title claims abstract description 26
- 239000002689 soil Substances 0.000 claims abstract description 53
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 18
- 238000007689 inspection Methods 0.000 claims abstract description 17
- 239000003365 glass fiber Substances 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 230000006872 improvement Effects 0.000 claims abstract description 5
- 238000011835 investigation Methods 0.000 claims abstract description 5
- 238000007493 shaping process Methods 0.000 claims abstract description 5
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000009966 trimming Methods 0.000 claims abstract description 4
- 238000009533 lab test Methods 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 238000005056 compaction Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000009490 roller compaction Methods 0.000 claims description 4
- 238000012372 quality testing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000011398 Portland cement Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000002893 slag Substances 0.000 claims description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims 1
- 235000011613 Pinus brutia Nutrition 0.000 claims 1
- 241000018646 Pinus brutia Species 0.000 claims 1
- 238000010348 incorporation Methods 0.000 claims 1
- 239000003755 preservative agent Substances 0.000 claims 1
- 230000002335 preservative effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000007605 air drying Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, comprise the following steps：Survey and construction scene, carries out field investigation and sampling, and laboratory test is determined, construction lofting, site clearing；Material prepares：Various improved materials and construction equipment needed thereby equipment are prepared according to result of the test；Drainage system is set；Optional test section carries out constructing and quality inspection, carries out next step after quality inspection is qualified；Calculating needs the earth volume of improvement, and cement and fiber total amount according to needed for Earthwork Calculation；Subgrade construction quality inspection, carry out next step after quality inspection is qualified；Road bed inspection, shaping, slope trimming.Former subgrade soil is carried out digging, is smashed by this construction method, mix proper amount of cement and glass fibre, flatten again, be compacted, conserve, form high stability, the modified soil subgrade of high intensity, can effectively reduce the harm that granite residual soil area roadbed water disintegration is caused to subgrade and pavement.
Description
Technical field
The present invention relates to a kind of roadbed construction method, more particularly to one kind cement and fiber suppress granite residual dirt road
The construction method of base disintegrate.
Background technology
Granite residual soil has obvious disintegrative, meets water electrode and disintegrate easily occurs, and be swift in response, once intensity of disintegration
Rapid drawdown.Under such geological conditions, easily occur road bank settlement, the landslide of roadbed side slope, roadbed along hillside slip etc.
Geological disaster.Therefore, granite residual soil area roadbed in addition to wanting proof strength, rigidity, it is also expressly noted which is whole
Body stability and water stability.
Content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of intensity that can improve roadbed and stability in the large, effectively
The use cement and fiber of suppression granite residual soil water disintegration phenomenon suppress the construction method of the earth roadbed disintegrate of granite residual.
Technical proposal that the invention solves the above-mentioned problems is：One kind cement and fiber suppress that granite residual is earth roadbed to be collapsed
The construction method of solution, comprises the following steps：
1）Survey and construction scene, carries out field investigation and sampling, and laboratory test is determined, construction lofting, site clearing；
2）Material prepares：Various improved materials and construction equipment needed thereby equipment are prepared according to result of the test；
3) drainage system is set；
4）Optional test section carries out constructing and quality inspection, carries out next step after quality inspection is qualified；
5）Calculating needs the earth volume of improvement, and cement and fiber total amount according to needed for Earthwork Calculation；
6）Subgrade construction quality inspection, carry out next step after quality inspection is qualified；
7）Road bed inspection, shaping, slope trimming.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 1）In, adopt
Indoor triaxial test determines cement proportion and fibre furnish, comprises the following steps that：Soil sample is air-dried, is pulverized, sieve after
It is divided into two groups；Soil sample is divided into 6 parts by first group of test cement optimum proportioning, be separately added into 4% in 6 parts of soil samples, 5%, 6%,
7%th, 8% and 9% 6 kind of different quality containing cement mixed weight, measured by indoor triaxial test and when the mass fraction of cement be
When 6%, its cohesion and internal friction angle are maximum；The optimum proportioning of second group of test fiber, it is 6% to mix mass fraction in soil sample
Cement after, be divided into 6 parts, in 6 parts of soil samples again respectively mix 0.5 ‰, 1 ‰, 1.5 ‰, 2 ‰, 2.5 ‰ and of mass fraction
3 ‰ fiber, measures its cohesion, internal friction angle when the mass fraction of fiber is 1 ‰ by indoor triaxial test maximum；?
Go out the optimal cement proportion mass fraction of conclusion and fibre furnish mass fraction is respectively 6% and 1 ‰.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 3）In, on road
Basilar parts arrange gutter along roadbed direction in its both sides.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 4）In, will examination
The subgrade soil for testing section digs, dry in the sun, smash, shelving 24 hours, add 6% cement and 1 ‰ fibers, mix be uniform, leveling,
Compaction in layers through quality testing qualified after formally gone into operation.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 5）In, for
Whether embankment embankment, the compactness of detection roadbed substrate undisturbed soil, intensity, stability meet the requirements：If through being measured by sampling
Meet the requirements, then the total amount of cement and fiber needed for calculating according to amount of fill；If roadbed substrate undisturbed soil does not meet after measured
Require, then it is that amount of fill improves earth volume sum with substrate to need the earth volume for improveing；For zero padding and cut subgrade, by roadbed
The undisturbed soil of 0 ~ 80cm below bottom surface is improved and is conserved.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 6）Subgrade construction
Concretely comprise the following steps：
（1）The earthwork that need to be improved is dug, dry in the sun, is smashed, the soil body that smashes is configured to moisture content for vexed after 23.85%
Put 24 hours；
（2）6% cement and 1 ‰ glass fibre is sprinkled in the vexed good soil body, and mix is uniform；
（3）By the soil body paving and leveling for mixing, layered rolling, often rolled one layer detection compactness, qualified after carry out
Next layer of making is rolled；
（4）Roadbed is rolled, closed to vehicles.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 6）Subgrade construction
Concrete steps（2）In, glass fibre length is 5 ~ 8cm, glass fibre is scatter and be uniformly sprinkled into again in the vexed good soil body, instead
Multiple stirring, until without conglomeration and substantially exposed glass fibre.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 6）Subgrade construction
Concrete steps（3）In, adjacent wheelmark coincidence more than 1/3 in roller compaction process, every layer of loose laying depth is not more than 30cm, roadbed top surface
The compacted depth of last layer is more than 10cm.
Above-mentioned use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, the step 1）In cement
For portland cement, portland slag cement or pozzolan cement, the final setting time of cement is more than 6h.
The beneficial effects of the present invention is：
1st, script is unsatisfactory for requiring needing changing the subgrade soil filled out and carries out digging, smashes, appropriate mix by this construction method
Cement and glass fibre, then flatten, be compacted, conserve, so as to form the modified soil subgrade of a kind of high stability, high intensity, can
Effectively to reduce the harm that granite residual soil area roadbed water disintegration is caused to subgrade and pavement；
2nd, appropriate glass fibre is added in the roadbed after constructing, change the failure mode of light water soil, broken by fragility
The bad elastoplasticity that is changed into is destroyed, and can alleviate the brittle break that roadbed is produced because of the impact of larger load, to the road for wrecking
Great cushioning effect is played on base road surface, extends the service life of roadbed；
3rd, this construction method script needs can be changed the soil layer that fills out and made full use of, and significantly improve the stability of roadbed and resist
Pressure performance, substantially reduces workload and working time, and then reduces construction cost.
Description of the drawings
Fig. 1 is the construction process figure of the present invention.
Fig. 2 is roadbed section schematic diagram.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, the invention discloses a kind of use cement and fiber suppress the construction of the earth roadbed disintegrate of granite residual
Method, comprises the following steps：
1）Survey and construction scene, carries out field investigation and sampling, determines cement proportion and fibre furnish by indoor triaxial test, its
The optimal cement proportion mass fraction of middle granite residual soil is 6%, and optimal fibre furnish mass fraction is 1 ‰, construction lofting,
Site clearing.Carry out during indoor triaxial test air-drying soil sample, pulverize, sieve, and be divided into two groups；First group is used for
Soil sample is divided into 6 parts by test cement optimum proportioning, is separately added into 4%, 5%, 6%, 7%, 8% and 9% 6 kind of different quality containing
Cement, measures its cohesion and internal friction angle maximum when the mass fraction of cement is 6% by indoor triaxial test, and intensity is big,
Therefore optimal cement mixed weight is chosen for 6%；Second group of optimum proportioning for being used for testing fiber, mixes mass fraction in soil sample
After for 6% cement, 6 parts are divided into, mix mass fraction 0.5 ‰, 1 ‰, 1.5 ‰, 2 ‰, 2.5 ‰ in 6 parts of soil samples again respectively
Fiber with 3 ‰, measures when the mass fraction of fiber is 1 ‰ its cohesion, internal friction angle and strong by indoor triaxial test
Degree is maximum, and particularly stress-strain diagram is clearly distinguishable from soil cement, and failure mode is changed into compression failure by failure by shear；Cause
This determines optimal cement proportion by indoor triaxial test and fibre furnish is respectively 6% and 1 ‰；
2）Material prepares：Various improved materials and construction equipment needed thereby equipment are prepared according to result of the test；
3) drainage system is set：Gutter is set in roadbed bottom in its both sides along roadbed direction；
4）Optional test section, the subgrade soil of test section is dug, dry in the sun, smash, shelving is after 24 hours, adds 6%
Cement and 1 ‰ fibers, mix are uniform, leveling, compaction in layers, through quality testing qualified after formally gone into operation；
5）Calculating needs the earth volume of improvement, and cement and fiber total amount according to needed for Earthwork Calculation：For embankment road
Whether dike, the compactness of detection roadbed substrate undisturbed soil, intensity, stability meet the requirements：If conformed to through sampling and measuring
Ask, then the total amount of cement and fiber needed for calculating according to amount of fill；If roadbed substrate undisturbed soil is undesirable after measured,
The earth volume for needing improvement is that amount of fill improves earth volume sum with substrate；For zero padding and cut subgrade, by roadbed bottom surface with
The undisturbed soil of lower 0 ~ 80cm is improved and is conserved；
6）Subgrade construction quality inspection；
（1）The earthwork that need to be improved is dug, dry in the sun, is smashed, field investigation and sampling measures the soil body most by standard compaction test
Big dry density is 1.54g/cm, and optimum moisture content is 23.85%, and the soil body that smashes is configured to vexed after optimum moisture content state
Put 24 hours；
（2）6% cement and 1 ‰ glass fibre is sprinkled in the vexed good soil body, and mix is uniform；Glass fibre length is
8cm, uneven for cement and fiber mix, mainly take both sides measure：First, will be uniform for satisfactory cement
It is sprinkled in the soil body, through mix repeatedly.The glass fibre of conglomeration should be disperseed by glass fibre easily conglomeration in its natural state
Open and be uniformly sprinkled in the soil body to be improved again, stir repeatedly, until without conglomeration and substantially exposed glass fibre.Second, consideration water
Mix process setting time of mud should not adopt artificial mix, should adopt powerful mix plant；
（3）The soil body for mixing uniformly is paved, precompressed leveling, layered rolling, roll follow first light-duty after heavy, speed
First slow rear fast, adjacent wheelmark coincidence more than 1/3 in roller compaction process is answered, every layer of loose laying depth is not more than 30cm, and roadbed top surface is last
One layer of compacted depth is more than 10cm；Often rolled one layer detection compactness k value, qualified after can carry out next layer making grind
Pressure；
In roller compaction process, for the process of seam and switch area：The joining place of two active sections that constructs on the same day should be adopted
With joint form, after the last period mix shaping, stay 5m not rolled, afterwards during one section of construction, should stay with the last period and not press
Mix is rolled again together for part；Mixing machinery and other equipment are not reversed end for end on the road bed for completing has been rolled, if
Must reverse end for end, carry out on the work surface not rolled as far as possible；
（4）Roadbed is rolled, closed to vehicles.
7）Road bed inspection, shaping, slope trimming；Fig. 2 is roadbed section schematic diagram, and roadbed adopts compaction in layers, roadbed
Surface is conducive to draining the water away into two-way horizontal wall inscription.
During roadbed design and build, should be taken according to local hydrological geological conditions and arrange with technical in structure
Apply, make the humidity and range of temperature of roadbed conditioned soil be down to minimum, the maintenance stage particularly after subgrade compaction, must
Stablizing for moisture content and temperature must be ensured, to guarantee that roadbed there are enough strength and stabilities.Therefore, can fit during build
When the height for improving roadbed filling, to prevent water point from penetrating into from side, or level of ground water ascends into roadbed work area scope；Must
Water barrier can also be set when wanting, to block the passage of capillary water rising；Or take appropriate slope reinforcement measure, build gear
Native structures are improving roadbed stability in the large.
Claims (5)
1. a kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, comprise the following steps：
1) survey and construction scene, carries out field investigation and sampling, and laboratory test is determined, construction lofting, site clearing；
2) material prepares：Various improved materials and construction equipment needed thereby equipment are prepared according to result of the test；
3) drainage system is set；
4) optional test section carries out constructing and quality inspection, carries out next step after quality inspection is qualified；
5) calculating needs the earth volume of improvement, and cement and fiber total amount according to needed for Earthwork Calculation；
6) subgrade construction quality inspection, carry out next step after quality inspection is qualified；
7) road bed inspection, shaping, slope trimming；
The step 1) in, cement proportion and fibre furnish are determined using indoor triaxial test, is comprised the following steps that：To be fetched earth
Sample air-dries, pulverizes, sieve after be divided into two groups；Soil sample is divided into 6 parts by first group of test cement optimum proportioning, in 6 parts of soil samples
In be separately added into the cement mixed weight of 4%, 5%, 6%, 7%, 8% and 9% 6 kind of different quality containing, tried by indoor three axle
When the mass fraction of the proper cement of test is 6%, its cohesion and internal friction angle are maximum；The optimum proportioning of second group of test fiber,
After incorporation mass fraction is 6% cement in soil sample, 6 parts are divided into, mix mass fraction in 6 parts of soil samples again respectively
0.5 ‰, 1 ‰, 1.5 ‰, 2 ‰, 2.5 ‰ and 3 ‰ fiber, is measured by indoor triaxial test and when the mass fraction of fiber is
When 1 ‰, its cohesion, internal friction angle are maximum；The cement proportion mass fraction for reaching a conclusion optimal and fibre furnish mass fraction point
Wei 6% and 1 ‰；
The step 4) in, the subgrade soil of test section is dug, dry in the sun, smash, shelving 24 hours, add 6% cement and
1 ‰ fibers, mix are uniform, leveling, compaction in layers through quality testing qualified after formally gone into operation；
The step 6) subgrade construction concretely comprises the following steps：
(1) earthwork that need to be improved dug, dry in the sun, smashed, the soil body that smashes is configured to moisture content and 24 is put for vexed after 23.85%
Hour；
(2) 6% cement and 1 ‰ glass fibre are sprinkled in the vexed good soil body, and mix is uniform；
(3) by the soil body paving and leveling for mixing, layered rolling, often rolled one layer detection compactness, qualified after carry out next
The making of layer is rolled；
(4) preservative film maintenance is covered after roadbed is rolled and finished, closed to vehicles；
The step 6) subgrade construction concrete steps (2) in, glass fibre length be 5～8cm, glass fibre is scatter again
Uniformly it is sprinkled in the vexed good soil body, stirs repeatedly, until without conglomeration and substantially exposed glass fibre.
2. use cement as claimed in claim 1 and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, its feature
It is：The step 3) in, gutter is set in roadbed bottom in its both sides along roadbed direction.
3. use cement as claimed in claim 1 and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, its feature
It is：The step 5) in, for embankment embankment, whether the compactness of detection roadbed substrate undisturbed soil, intensity, stability meet
Require：If met the requirements through sampling and measuring, the total amount of cement and fiber needed for calculating according to amount of fill；If after measured
Roadbed substrate undisturbed soil is undesirable, then it is that amount of fill improves earth volume sum with substrate to need the earth volume for improveing；For
The undisturbed soil of 0～80cm below roadbed bottom surface is improved and is conserved by zero padding and cut subgrade.
4. use cement as claimed in claim 1 and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, its feature
It is：The step 6) subgrade construction concrete steps (3) in, in roller compaction process, adjacent wheelmark overlaps more than 1/3, per layer of pine paving
Thickness is not more than 30cm, and the compacted depth of roadbed top surface last layer is more than 10cm.
5. use cement as claimed in claim 1 and fiber suppress the construction method of the earth roadbed disintegrate of granite residual, its feature
It is：The step 1) in cement be portland cement, portland slag cement or pozzolan cement, the final setting time of cement
For more than 6h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510020658.3A CN104631255B (en) | 2015-01-16 | 2015-01-16 | A kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510020658.3A CN104631255B (en) | 2015-01-16 | 2015-01-16 | A kind of use cement and fiber suppress the construction method of the earth roadbed disintegrate of granite residual |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105155378B (en) * | 2015-09-02 | 2017-08-18 | 湖州浩诚环境工程有限公司 | A kind of rendzinas subgrade construction technique |
| CN106917388A (en) * | 2017-03-14 | 2017-07-04 | 广东省长大公路工程有限公司 | The check dam and construction method of a kind of use Fill Reinforced With Geogrids modified cement soil clad |
| CN110419289A (en) * | 2019-07-09 | 2019-11-08 | 中国一冶集团有限公司 | A kind of road Red Sandstone soil improvement construction method |
| CN110528346A (en) * | 2019-07-24 | 2019-12-03 | 中国一冶集团有限公司 | A kind of Red Sandstone improvement construction method |
| CN113373749A (en) * | 2021-06-22 | 2021-09-10 | 湖南工程学院 | Improved construction method for granite residual soil roadbed |
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| JPH04189903A (en) * | 1990-11-22 | 1992-07-08 | Sumitomo Metal Ind Ltd | Quick-hardening subgrade improvement material |
| JP2002013102A (en) * | 2000-06-28 | 2002-01-18 | Shiima Consultant:Kk | Soil improvement method |
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Patent Citations (4)
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|---|---|---|---|---|
| JPH04189903A (en) * | 1990-11-22 | 1992-07-08 | Sumitomo Metal Ind Ltd | Quick-hardening subgrade improvement material |
| JP2002013102A (en) * | 2000-06-28 | 2002-01-18 | Shiima Consultant:Kk | Soil improvement method |
| CN1963022A (en) * | 2006-11-22 | 2007-05-16 | 天津市市政工程设计研究院 | Use method of industrial caustic dross in treatment of road bed and foundation |
| CN102153303A (en) * | 2010-12-13 | 2011-08-17 | 中铁第四勘察设计院集团有限公司 | Chemical improving method using soft rock weathered material as high-speed railway subgrade filler |
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| Title |
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