CN103422407A - Construction process using cement diatomite to stabilize desert sand mixture to build Niger desert road - Google Patents
Construction process using cement diatomite to stabilize desert sand mixture to build Niger desert road Download PDFInfo
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- CN103422407A CN103422407A CN2012101514060A CN201210151406A CN103422407A CN 103422407 A CN103422407 A CN 103422407A CN 2012101514060 A CN2012101514060 A CN 2012101514060A CN 201210151406 A CN201210151406 A CN 201210151406A CN 103422407 A CN103422407 A CN 103422407A
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000004568 cement Substances 0.000 title claims abstract description 48
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 38
- 239000004576 sand Substances 0.000 title claims abstract description 37
- 230000008569 process Effects 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 238000011068 loading method Methods 0.000 claims abstract description 22
- 238000003756 stirring Methods 0.000 claims abstract description 22
- 238000007654 immersion Methods 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims description 77
- 238000005096 rolling process Methods 0.000 claims description 20
- 241000196324 Embryophyta Species 0.000 claims description 11
- 238000005070 sampling Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 230000036541 health Effects 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 4
- 235000011613 Pinus brutia Nutrition 0.000 claims description 4
- 241000018646 Pinus brutia Species 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 239000003643 water by type Substances 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000002950 deficient Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 2
- 238000005056 compaction Methods 0.000 abstract 1
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- 238000005516 engineering process Methods 0.000 description 9
- 238000001704 evaporation Methods 0.000 description 8
- 230000008020 evaporation Effects 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 3
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- 239000010881 fly ash Substances 0.000 description 3
- 239000004571 lime Substances 0.000 description 3
- 239000011384 asphalt concrete Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004746 geotextile Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000013011 mating Effects 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000003340 retarding agent Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
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- 239000000126 substance Substances 0.000 description 1
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Abstract
The invention discloses a construction process using cement diatomite to stabilize a desert sand mixture to build a Niger desert road, and aims to overcome the defects that in Niger desert materials for road construction are deficient, and road construction investment is high. The construction process using the cement diatomite to stabilize the desert sand mixture to build the Niger desert road comprises the following steps: A. line layout for construction, B. roadbed primary flatting, C. first water spraying, with sand immersed by water deeper than 20 cm, D. roadbed sand fine flatting, E. sand ridging of road shoulders, with the sand in both sides being wider than 50 cm, F. secondary water spraying, with an average water immersion depth being ensured, G. mixing and stirring of a mixture, H. loading and spreading of the mixture, I. mixture compaction and J. maintenance. In the step G, a mixing method by heaping or a mixing method on a road or a mixing method in a concentration plant is used for mixing and stirring of the mixture. The beneficial effects of the construction process are that: the construction process is simple, can better control the construction quality, and can reduce the construction cost.
Description
Technical field
The present invention relates to a kind of road in desert area field construction technology, especially relate to a kind of employing cement kieselguhr and stablize Desert Sand compound build Niger Highway Construction in Desert technique.
Background technology
At present, the build technology of the road in desert area treatment of the earth layer of domestic and international maturation mainly contains following several form:
1, bed course
Three grades of domestic standards and following low-grade highway, adopt clay punishment sand, natural gravel, geotextiles and geotechnical grid to add and fix the sand; Secondary and above standard highway, the most often adopt the natural gravel of natural gravel or geotextiles upper berth, and geotechnical grid adds and fixes the sand etc.
2, subbase and basic unit
Three grades of domestic standards and following low-grade highway, adopt the means of particulate material such as natural gravel, graded broken stone; And the husky semi-rigid material of the stabilized with inorganic binder such as cement, lime, flyash, cement adds the chemical addition agent stabilized sand, curing compound stabilized sand etc.Secondary and above standard highway, adopt the means of particulate material such as natural gravel, graded gravel, graded broken stone; The stabilized with inorganic binder such as cement, lime fly ash sand, the semi-rigid materials such as Aggregate Stabilized with Cement or rubble.
3, surface layer
Three grades of domestic standards and following low-grade highway, adopt pitch table place, bituminous concrete, mud knot rubble, mud knot gravel, brick or the concrete precast block road surface of mating formation usually; And the husky surface of the cement stabilizing of not yet applying pours into the water glass solution pavement technique.Secondary and above standard highway, adopt bituminous concrete, SBS and SBR modified asphalt concrete and new technology silicon-modified asphalt concrete, cement concrete pavement etc.
Because the material that can be used for building the road in Niger desert is very deficient, except abundant Desert Sand with local low-lying place is scattered is distributed with low-grade kieselguhr, do not have the outsourcing materials such as the required pitch of roadbed, ground surface material that sand, clay, gravel, rock, lime, flyash etc. are commonly used, cement, steel, rubble much all to need import, and must rely on the transport vehicle transportation of extraordinary desert, buying and freight are extremely high.Therefore build Road Site in Niger's desert area oil field, invest very high, unreasonable economically.
Summary of the invention
In order to overcome the material scarcity that can be used for building the road in Niger desert, build road and invest high deficiency, the invention provides a kind of employing cement kieselguhr and stablize Desert Sand compound build Niger Highway Construction in Desert technique.The cement kieselguhr that the applicant just the present invention relates to is stablized the Desert Sand compound and has been applied for separately patent.
The technical solution adopted for the present invention to solve the technical problems is: adopt cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, the steps include:
A. the construction line-putting,
B. roadbed is just flat,
C. once watering, immerse sand >=20cm,
D. the husky essence of roadbed is flat,
E. train husky curb, both sides >=50cm,
F. secondary waters, and guarantees that immersed depth is average,
G. compound mixes and stirs,
H. the compound material loading, pave,
I. compound compacting,
J. health.
Step G compound mixes and stirs and adopts heap companion's method or road-mix method or concentrated plant mixing method.
The invention has the beneficial effects as follows, according to Niger's desert area road materials scarcity, the characteristics that abundant Desert Sand and the fragmentary low-grade diatomite resource distributed are only arranged, by adding a small amount of Portland cement, Admixture mixing water mix forms, adopt the conventional road building machinery decking and rolling moulding such as land leveller, loader, bulldozer or paver, can be used as the decks such as Road Site bed course, subbase, basic unit, surface layer after health.Construction technology is simple, and the Control Engineering quality, reduce engineering cost preferably.
The accompanying drawing explanation
Fig. 1 is process chart of the present invention.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.But those skilled in the art should know, the invention is not restricted to the listed specific embodiment, as long as spirit according to the invention all should be included in protection scope of the present invention.
Construction technology material therefor of the present invention is Niger's desert Desert Sand kieselguhr and cement admixture, and its component and content are:
All percentage is percetage by weight.
Build secondary or secondary to get down the highway, the maximum particle diameter≤37mm of the stabilized sand compound individual particle that bed course is used; Maximum particle diameter≤the 26.5mm of the stabilized sand compound individual particle that subbase is used; Maximum particle diameter≤the 16mm of the stabilized sand compound individual particle that basic unit is used; Maximum particle diameter≤the 4.75mm of the stabilized sand compound individual particle that surface layer is used.
Building highway or Class I highway, the maximum particle diameter≤31.5mm of the stabilized sand compound individual particle that bed course is used; Maximum particle diameter≤the 19mm of the stabilized sand compound individual particle that subbase is used; Maximum particle diameter≤the 9.5mm of the stabilized sand compound individual particle that basic unit is used; Maximum particle diameter≤the 4.75mm of the stabilized sand compound individual particle that surface layer is used.
SiO in Desert Sand
2Content is 93%～99%; Diatom shell content 20%～35% before Purification of Diatomite, Desert Sand content 63.5%～74%, clay≤1%, and lyotropic salt composition and the Fe of minute quantity
2O
3Etc. mineralogical composition, diatom shell content 80%～95% after purifying.
Admixture is efficient retardation water reducing agent or retarding agent.
The construction technology that adopts above-mentioned material to build Niger's desert highway, the steps include:
A. the construction line-putting,
B. roadbed is just flat,
C. once watering, immerse sand >=20cm,
D. the husky essence of roadbed is flat,
E. train husky curb, both sides >=50cm,
F. secondary waters, and guarantees that immersed depth is average,
G. compound mixes and stirs,
H. the compound material loading, pave
I. compound compacting
J. health.
Step G compound mixes and stirs and adopts heap companion's method or road-mix method or concentrated plant mixing method.
Niger's road in desert area, the construction of place cement kieselguhr stabilized sand mixture structure layer mainly comprise Niger's ore separation of diatomite, kieselguhr full water soaking, sub-layer preparation, compound mix, mixture laying and roll.
According to the quality specifications grade difference of engineering quantity size, place and road, the construction technology of taking and matching equipment are also different.Specific construction technique is as follows:
1, the back court compound takes heap to mix method (also claim collect together the method for mixing), and front court takes loader, bulldozer smooth, and road roller rolls.Concrete operation is as follows:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, the general time is for soaking about 48 hours.
(2) kieselguhr after immersion is other gets Desert Sand with excavator or loader on the spot, the match ratio definite according to sampling test is converted to volume ratio, scene is mixed and is joined compound (as kieselguhr: Desert Sand=1: 3 fills 1 bucket kieselguhr with excavator and mixes to refilling 3 bucket Desert Sand to stockpiles after the compound stockpile).
(3) the mixing stockpile that will mix after joining is raised and is mixed 1～2 time with loader or excavator again, until evenly.
(4) after loader or excavator will mix the stockpile shaping roughly, measure its pine heap volume with steel ruler, be converted to volume ratio according to the definite match ratio of test, sacked cement (preferably retarded cement), water and the artificial cooperating equipment of Admixture are spread in uniform in and mix the stockpile surface, again mix and stir 2～3 times, until evenly.Initial water content is controlled and should be exceeded 2%～4% of optimum moisture content, and to offset the moisture evaporation in the construction at high temperature process of desert, concrete initial water content is adjusted through measuring temperature at that time of construction and wind speed.
(5) prepare husky base sub-layer.At first base course (sub-layer) is carried out setting-out, leveling, sprinkles water, rolls.To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.After rolling, use with the distinguishing material marking per car of husky base color compound unload truck position (calculating in advance the area that paves of per car compound).
(6) compound mixed and stirred is transported to job site.With smooth equipment (as loader, bulldozer or land leveller), compound is carried out to leveling work, this process and follow-up rolling should be no more than 3 hours.
(7) with compacting equipment, to flattening complete compound, rolled.The face that rolls should be closely knit and bright and clean, avoids passing, stops up bag and rub with the hands and split phenomenon.
2, the back court compound takes heap to mix method (also claiming to collect together the method for mixing), and front court takes paver to pave, and road roller rolls.Concrete operation is as follows:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, generally soak about 48 hours.
(2) kieselguhr after immersion is other gets Desert Sand with excavator or loader on the spot, the match ratio definite according to sampling test is converted to volume ratio, scene is mixed and is joined compound (as: kieselguhr: Desert Sand=1: 3 fills 1 bucket kieselguhr with excavator and mixes to refilling 3 bucket Desert Sand to stockpiles after the compound stockpile).
(3) the mixing stockpile that will mix after joining is raised and is mixed 1～2 time with loader or excavator again, until evenly basic.
(4) after loader or excavator will mix the stockpile shaping roughly, measure its pine heap volume with steel ruler, be converted to volume ratio according to the definite match ratio of test, sacked cement (preferably retarded cement), water and the artificial cooperating equipment of Admixture are spread in uniform in and mix the stockpile surface, again mix and stir 2～3 times, until evenly.Initial water content is controlled and should be exceeded 2%～4% of optimum moisture content, and to offset the moisture evaporation in the construction at high temperature process of desert, concrete initial water content is adjusted through measuring temperature at that time of construction and wind speed.
(5) prepare husky base sub-layer.At first base course (sub-layer) is carried out setting-out, leveling, sprinkles water, rolls.To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.After rolling, use with the distinguishing material marking per car of husky base color compound unload truck position (calculating in advance the area that paves of per car compound).
(6) compound mixed and stirred is transported to job site.Use the paver compound that paves, because the evaporation of desert area moisture is very fast, road roller should roll immediately following paver, and (each rolls paragraph and is no more than 30 meters), pave and the work of rolling must complete before the cement initial set.
3, the back court compound is taked road-mix method, and loader, bulldozer or land leveller leveling are taked in front court, and road roller rolls.Concrete operation is as follows:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time is about 48 hours usually.
(2) prepare husky base sub-layer.At first base course (sub-layer) is carried out setting-out, leveling, sprinkles water, rolls.To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.
(3) Desert Sand is transported to roadbed thick flat by smaller vehicle, thickness 22cm, the mode that complete kieselguhr, cement and the Admixture of immersion taked to beat grid, manually evenly pave on the Desert Sand surface.Initial water content according to calculated in advance is sprinkled water on surface, and initial water content is controlled and should be exceeded 2%～4% of optimum moisture content, and to offset the moisture evaporation in the construction at high temperature process of desert, concrete initial water content is adjusted through measuring temperature at that time of construction and wind speed.
(4) with mixing apparatus (as tractor, turnplow, disc harrow or soil stabilizer), mix and stir 2～4 times, until evenly.
(5) with smooth equipment (as loader, bulldozer or land leveller), compound is carried out to leveling work, this process and follow-up rolling should complete before the cement initial set.
(6) with compacting equipment, to flattening complete compound, rolled.The face that rolls is more closely knit and bright and clean, avoids passing, stops up bag and rub with the hands and split phenomenon.
4, the back court compound takes to concentrate plant mixing method, and loader, bulldozer or land leveller leveling are taked in front court, and road roller rolls.Concrete operation is as follows:
(1) set up stabilized soil mixing plant, debug qualified standby.
(2) kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time is about 48 hours.
(3) prepare husky base sub-layer.At first base course (sub-layer) is carried out setting-out, leveling, sprinkles water, rolls.To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.After rolling, use with the distinguishing material marking per car of husky base color compound unload truck position (calculating in advance the area that paves of per car compound).
(4) according to the definite match ratio of the prior sampling test in laboratory, loader material loading (kieselguhr, Desert Sand) is to the blending station feed bin, and Electronic Control cement, Admixture material loading speed and kieselguhr, Desert Sand belt speed mate simultaneously.Initial water content is controlled and should be exceeded 2%～3% of optimum moisture content, and to offset the moisture evaporation in the construction at high temperature process of desert, concrete initial water content is adjusted through measuring temperature at that time of construction and wind speed.
(5) with haulage vehicle, compound is transported to roadbed, with smooth equipment (as loader, bulldozer or land leveller), compound is carried out to leveling work, this process and follow-up rolling should be tried one's best fast, and all work must complete before the cement initial set.
(6) with compacting equipment, to flattening complete compound, rolled.Evidence, pneumatic-tired rollers have rolling effect preferably than single-drum road roller etc., and the face that rolls is more closely knit and bright and clean, can effectively avoid passing, stop up bag and rub with the hands and split phenomenon.
5, the back court compound is taked to concentrate plant mixing method, and the front court paver paves, and road roller rolls.Concrete operation is as follows:
(1) set up stabilized soil mixing plant, debug qualified standby.
(2) kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time is 48 hours usually.
(3) prepare husky base sub-layer.At first base course (sub-layer) is carried out setting-out, leveling, sprinkles water, rolls.To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.After rolling, use with the distinguishing material marking per car of husky base color compound unload truck position (calculating in advance the area that paves of per car compound).
(4) the definite match ratio according to sampling test, loader material loading (kieselguhr, Desert Sand) is to the blending station feed bin, simultaneously Electronic Control cement, Admixture material loading speed and kieselguhr, Desert Sand belt speed coupling.Initial water content is controlled and should be exceeded 2%～3% of optimum moisture content, and to offset the moisture evaporation in the construction at high temperature process of desert, concrete initial water content is adjusted through measuring temperature at that time of construction and wind speed.
(5) with tipping lorry, the compound mixed and stirred is transported to job site.Use the paver compound that paves, because the evaporation of desert area moisture is very fast, road roller should be closelyed follow paver and be rolled (each rolls paragraph and is no more than 30 meters), paves and roll before being operated in the cement initial set to complete.
Construction technology main points of the present invention:
(1) select higher natural diatomaceous earth and the Desert Sand of purity to mix and stir, mixing and stirring must be even, and below maximum particle diameter 3cm;
(2) definite external adding water ratio such as the temperature when mixing and stirring, wind speed;
(3) pave and mix speed should finish within 4 hours, should adopt retarded cement, initial setting time to be not less than 4 hours as far as possible;
(4) can suitably sprinkle water on surface after the construction, and cover health 7 days with Polypropylence Sheet in time.
The major function of Admixture is for increasing the time of setting of cement, but improve mobility and the application property of cement kieselguhr stabilized sand, slow down moisture evaporation rate under the high temperature hot environment, during delaying from mix to the decking and rolling molding construction simultaneously, hydrated reaction of cement speed, reduce and postpone loss of strength.
Where necessary, can also lay the single or multiple lift geosynthetics at husky base end face and play as separation layer is double the effect that Sha Ji is stable, as high-strength polyethylene establishment cloth etc.
It should be noted that above-described embodiment is example and unrestricted the present invention, those skilled in the art can design a lot of alternate embodiments and not break away from the claim scope of this patent.
Claims (7)
1. one kind adopts cement kieselguhr to stablize Desert Sand compound build Niger Highway Construction in Desert technique, the steps include:
A. the construction line-putting,
B. roadbed is just flat,
C. once watering, immerse sand >=20cm,
D. the husky essence of roadbed is flat,
E. train husky curb, both sides >=50cm,
F. secondary waters, and guarantees that immersed depth is average,
G. compound mixes and stirs,
H. the compound material loading, pave,
I. compound compacting,
J. health.
2. adopt according to claim 1 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described step G compound mixes and stirs and adopts heap companion's method or road-mix method or concentrated plant mixing method.
3. adopt according to claim 2 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described compound mixes and stirs back court and adopts heap to mix method, front court takes loader, bulldozer smooth, and road roller rolls, process:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time 44～50 hours;
(2) kieselguhr after immersion is other gets Desert Sand with excavator or loader on the spot, and the match ratio definite according to sampling test is converted to volume ratio, and scene is mixed and joined compound;
(3) the mixing stockpile that will mix after joining is raised and is mixed 1～2 time with loader or excavator again, until evenly;
(4) after loader or excavator will mix the stockpile shaping roughly, with steel ruler, measure its pine heap volume, according to the definite match ratio of test, be converted to volume ratio, cement, water and Admixture are spread in uniform in and mix the stockpile surface, again mix and stir 2～3 times;
(5) prepare husky base sub-layer, at first base course is carried out setting-out, leveling, sprinkles water, rolls; To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky; Use the truck position of unloading with the distinguishing material marking per car of husky base color compound after rolling;
(6) compound mixed and stirred is transported to job site, with smooth equipment, compound is carried out to leveling work, this process and follow-up rolling should be no more than 3 hours;
(7) with compacting equipment, to flattening complete compound, rolled, the face that rolls is closely knit, bright and clean, without passing, stop up bag and rubbing with the hands, splits phenomenon.
4. adopt according to claim 2 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described compound mixes and stirs back court and adopts heap to mix method, and front court takes paver to pave, and road roller rolls, and operation is as follows:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time 44～50 hours;
(2) kieselguhr after immersion is other gets Desert Sand with excavator or loader on the spot, and the match ratio definite according to sampling test is converted to volume ratio, and scene is mixed and joined compound;
(3) the mixing stockpile that will mix after joining is raised and is mixed 1～2 time with loader or excavator again, until evenly;
(4) after loader or excavator will mix the stockpile shaping roughly, with steel ruler, measure its pine heap volume, according to the definite match ratio of test, be converted to volume ratio, cement, water and Admixture are spread in uniform in and mix the stockpile surface, again mix and stir 2～3 times;
(5) prepare husky base sub-layer, at first base course is carried out setting-out, leveling, sprinkles water, rolls; To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky.Use the truck position of unloading with the distinguishing material marking per car of husky base color compound after rolling;
(6) compound mixed and stirred is transported to job site, uses the paver compound that paves, paving and rolling before being operated in the cement initial set completes.
5. adopt according to claim 2 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described compound mixes and stirs back court and adopts road-mix method, loader, bulldozer or land leveller leveling are taked in front court, and road roller rolls, and operation is as follows:
(1) at first kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time 44～50 hours;
(2) prepare husky base sub-layer, at first base course is carried out setting-out, leveling, sprinkles water, rolls; To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky;
(3) Desert Sand is transported to roadbed thick flat by smaller vehicle, thickness 22cm, the mode that complete kieselguhr, cement and the Admixture of immersion taked to beat grid, manually evenly pave on the Desert Sand surface; Initial water content according to calculated in advance is sprinkled water on surface;
(4) with mixing apparatus, mix and stir 2～4 times, until evenly;
(5) with smooth equipment, compound is carried out to leveling work, this process and follow-up rolling before the cement initial set complete;
(6) with compacting equipment, to flattening complete compound, rolled, the face that rolls is closely knit, bright and clean, without passing, stop up bag and rubbing with the hands, splits phenomenon.
6. adopt according to claim 1 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described compound mixes and stirs back court and takes to concentrate plant mixing method, loader, bulldozer or land leveller leveling are taked in front court, and road roller rolls, and operation is as follows:
(1) set up stabilized soil mixing plant, debug qualified standby;
(2) kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time 44～50 hours;
(3) prepare husky base sub-layer, at first base course is carried out setting-out, leveling, sprinkles water, rolls; To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky; Use the truck position of unloading with the distinguishing material marking per car of husky base color compound after rolling;
(4) the definite match ratio according to sampling test, the loader material loading is to the blending station feed bin, simultaneously Electronic Control cement, Admixture material loading speed and kieselguhr, Desert Sand belt speed coupling;
(5) with haulage vehicle, compound is transported to roadbed, with smooth equipment, compound is carried out to leveling work, this process and follow-up rolling should be tried one's best fast, and all work must complete before the cement initial set;
(6) with compacting equipment, to flattening complete compound, rolled, the face that rolls is closely knit, bright and clean, without passing, stop up bag and rubbing with the hands, splits phenomenon.
7. adopt according to claim 2 cement kieselguhr to stablize the Desert Sand compound and build Niger's Highway Construction in Desert technique, it is characterized in that: described compound mixes and stirs back court and takes to concentrate plant mixing method, and the front court paver paves, and road roller rolls, and operation is as follows:
(1) set up stabilized soil mixing plant, debug qualified standby;
(2) kieselguhr is transported to ward or the cofferdam of digging pit on the spot, uses water saturates fully, soak time 44～50 hours;
(3) prepare husky base sub-layer, at first base course is carried out setting-out, leveling, sprinkles water, rolls; To remain and water in the material loading paving process, guarantee that at least the thick sand bed of 20cm is not dry husky; Use the truck position of unloading with the distinguishing material marking per car of husky base color compound after rolling;
(4) the definite match ratio according to sampling test, the loader material loading is to the blending station feed bin, simultaneously Electronic Control cement, Admixture material loading speed and kieselguhr, Desert Sand belt speed coupling;
(5) with tipping lorry, the compound mixed and stirred is transported to job site, paving and rolling before being operated in the cement initial set completes.
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| CN112064438A (en) * | 2020-08-12 | 2020-12-11 | 包头钢铁（集团）有限责任公司 | Method for paving ore transportation highway |
| CN112746540A (en) * | 2020-12-24 | 2021-05-04 | 龙建路桥股份有限公司 | Construction method for reinforcing aeolian sand to pass through roadbed in geocell |
| CN114059563A (en) * | 2021-11-09 | 2022-02-18 | 中铁八局集团第七工程有限公司 | Multi-material layered filling method |
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| CN112064438A (en) * | 2020-08-12 | 2020-12-11 | 包头钢铁（集团）有限责任公司 | Method for paving ore transportation highway |
| CN112746540A (en) * | 2020-12-24 | 2021-05-04 | 龙建路桥股份有限公司 | Construction method for reinforcing aeolian sand to pass through roadbed in geocell |
| CN114059563A (en) * | 2021-11-09 | 2022-02-18 | 中铁八局集团第七工程有限公司 | Multi-material layered filling method |
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