CN109137667A - A kind of construction method of backroad - Google Patents
A kind of construction method of backroad Download PDFInfo
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- CN109137667A CN109137667A CN201810908406.8A CN201810908406A CN109137667A CN 109137667 A CN109137667 A CN 109137667A CN 201810908406 A CN201810908406 A CN 201810908406A CN 109137667 A CN109137667 A CN 109137667A
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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
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/32—Coherent pavings made in situ made of road-metal and binders of courses of different kind made in situ
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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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Abstract
The present invention relates to a kind of construction methods of backroad, belong to technical field of road construction, it solves remote, the technical issues of economic poor area carries out road construction on a large scale, its work progress includes surveying setting-out, the finishing of excavated-in t4 roadbed, rendzinas mix, it lime-soil base making and rolls, lime-soil base maintenance, Portland Cement Concrete Surface Course making, Portland Cement Concrete Surface Course maintenance, by the way that lime soil layer is arranged below Portland Cement Concrete Surface Course, and simplify construction procedure, increase soil proportion in lime-soil base, not only meet the requirement of road construction, construction cost has been saved simultaneously, reduce construction period, allow to be applied on a large scale remote, the road construction in economic poor area.
Description
Technical field
The present invention relates to technical field of road construction, more specifically, it is related to a kind of construction method of backroad.
Background technique
Recently as the development of rural economy, as the important infrastructure for driving rural economic development, backroad
Also more and more attention has been paid to.Backroad is to meet the roadbase that agricultural production and life of farmers traffic are needed and built to set
It applies, is the important infrastructure for being related to rural economy social development.Cement concrete pavement with its stability good, endurance,
Service life is high, antiskid and the advantages that good environmental adaptability, be increasingly used in urban road construction, and backroad is applied
Work is generally directly laid with one layer of brick to form road, particularly with remote, economic poor rural area on ground.Therefore how will
Reducing construction cost under the premise of cement concrete is applied to the making of backroad and guarantee meets road construction requirement becomes
Urgent problem at present.
Summary of the invention
The purpose of the present invention is to provide a kind of construction methods of backroad, by setting below Portland Cement Concrete Surface Course
Lime soil layer is set, and simplifies construction procedure, not only meets the requirement of road construction, while having saved construction cost, allows to
The road construction in remote, economic poor area is applied on a large scale.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of construction method of backroad, includes the following steps:
(1) surveying setting-out: survey crew finds original point reference substance in situ face, then in situ face discharge road middle line with
And roadbed sideline；
(2) excavated-in t4 roadbed is modified: cleaning road bed sundries is filled and led up roadbed lowered zones soil or stone fragment, using pressure
Road machine rolls the roadbed place of filling and leading up, until roadbed wheel track depth is less than or equal to 5mm；
(3) rendzinas mix: paving one layer lime after resolution in road bed, and sprinkles water on its surface, then in stone
Gray surface uniformly spreads out and spreads a layer of clay, and using mechanically or manually mix, mixes soil and lime tentatively, mixes while sprinkling water later
It closes, and soil and lime is made to be sufficiently mixed bonding, obtain rendzinas mixture；
(4) it lime-soil base making and rolls: rendzinas mixture is uniformly paved in road bed, and using land leveller or scrape
Plate flattens road surface, is rolled after leveling using the road roller road pavement of 12-15t, until roadbed wheel track depth is less than or equal to
Until 5mm；
(5) lime-soil base conserves: road surface after the completion of rolling carries out sprinkling maintenance, conserves 7-10 days, to complete lime
The making of soil matrix layer；
(6) Portland Cement Concrete Surface Course making: the installation template on road surface, and the one layer of cement concrete that pave in template pave
After the completion, it immediately with plug-in type and flat-plate vibrator by the uniform jolt ramming of cement concrete, bubble and is flowed out until road surface is not emerged
Until cement mortar, then road surface is flattened using plane machine or scraper plate, road pavement is plastered at least twice after leveling；
(7) Portland Cement Concrete Surface Course conserves: one layer of plastic foil of road surfacing after the completion of plastering is conserved 7-10 days, is torn open later
Removing template, to complete the making of Portland Cement Concrete Surface Course.
By using above-mentioned technical proposal, the step of road construction includes: surveying setting-out, the finishing of excavated-in t4 roadbed, lime
Native mix, lime-soil base making and roll, lime-soil base maintenance, Portland Cement Concrete Surface Course making, Portland Cement Concrete Surface Course
Lime soil layer is arranged below Portland Cement Concrete Surface Course, and simplifies construction procedure for maintenance, not only meets the requirement of road construction,
It saved construction cost simultaneously, reduced construction period, having allowed to apply the road in remote, economic poor area on a large scale
Road construction.
Preferably, the proportion of lime and soil is 15:85-25:75 in step (4).
By using above-mentioned technical proposal, soil proportion in lime-soil base is increased, has not only saved and has been constructed into
This, simultaneously because lime-soil base has good intensity and water stability, compression strength also with higher, load assignment energy
Power can effectively disperse the bearing capacity of road, reduce the damage of road, improve the intensity of road.
Preferably, the gross dry weight of active calcium oxide and activated magnesia accounts for the 80- of lime gross dry weight in the lime
85wt%。
By using above-mentioned technical proposal, the adhesion strength between lime and soil is increased, lime-soil base is improved
Strength and stability.
Preferably, the lime is cleared up using direct plus water, and the humidity after lime digestion is 20-30%.
By using above-mentioned technical proposal, the humidity after lime digestion is 20-30%, not only lime is made adequately to be disappeared
Solution, makes active calcium oxide and activated magnesia in lime be fully converted to calcium hydroxide and magnesium hydroxide respectively, avoids simultaneously
Amount of water is very few and makes to fly upward in lime and native mixed process；It avoids amount of water excessive and influences lime at paste or bulk
The mixing of lime and soil.
Preferably, the plasticity index of the soil is 7-16.
By using above-mentioned technical proposal, native plasticity index is higher, and the draw degree of lime-soil base is bigger, reduces soil
Plasticity index, not only increase lime-soil base crack resistance, while improving the strength and stability of lime-soil base.
Preferably, the lime-soil base with a thickness of 10-20cm, Portland Cement Concrete Surface Course with a thickness of 10-25cm.
By using above-mentioned technical proposal, the thickness of lime-soil base can require to be selected according to practice of construction,
When the thickness of lime-soil base is excessively thin, difficulty of construction is not only increased, while the open and flat degree of lime-soil base may also be influenced,
When the thickness of lime-soil base is blocked up, the maintenance difficulty of lime-soil base is not only increased, while increasing construction period；Cement
The thickness of concrete topping can require to be selected according to practice of construction, when the thickness of Portland Cement Concrete Surface Course is excessively thin, no
It is only difficult to ensure the intensity of road, while increasing difficulty of construction, when Portland Cement Concrete Surface Course is blocked up, increase cement concrete
Construction period and construction cost.
Preferably, the lime-soil base making is multilayer, and the thickness of every layer of lime-soil base is identical.
By using above-mentioned technical proposal, the number of plies of lime-soil base can be selected according to actual needs, to full
Foot difference road construction requirement, while the thickness of every layer of lime-soil base is identical, reduces difficulty of construction, accelerates construction indirectly
Period.
Preferably, the strength grade of the cement concrete is one of C25, C30, C35, C40.
By using above-mentioned technical proposal, cement concrete can require to be selected according to practice of construction, meet
Under the premise of the construction requirement of road, construction cost is reduced.
Preferably, the two sides of the road width that making has hardening road, and hardens road respectively is 0.5-1m, hardens road
Length and road equal length, the height of the height and road of hardening road is equal.
By using above-mentioned technical proposal, hardening road is set in road both sides, not only facilitates pedestrian in both sides of the road row
It walks, reduces traffic accident, the height of the height and road surface of hardening road is equal, ensure that the smooth of whole road surface, keeps away
Exempt from whole road surface height injustice occur and influence whole road or cause traffic accident.
Preferably, the hardening road is prepared using following methods:
(1) surveying setting-out: survey crew finds original point reference substance in situ face, and roadbed side is then discharged in situ face
Line；
(2) excavated-in t4 roadbed is modified: cleaning hardening road bed sundries fills out hardening roadbed lowered zones soil or stone fragment
It is flat, the hardening roadbed place of filling and leading up is rolled using road roller, until hardening road bed wheelmark depth is less than or equal to 5mm；
(3) it rendzinas mix: sprinkles water in the lime that hardening road bed paves one layer after resolution, and on its surface, then
It uniformly spreads out and spreads a layer of clay on lime surface, using mechanically or manually mix, mix soil and lime tentatively, sprinkle water one on one side later
Side mix, and soil and lime is made to be sufficiently mixed bonding, obtain rendzinas mixture；
(4) it lime-soil base making and rolls: rendzinas mixture uniformly being paved in hardening road bed, and uses land leveller
Or scraper plate flattens hard surface, is rolled using the road roller of 12-15t to hard surface after leveling, until hard surface wheel
Until mark depth is less than or equal to 5mm；
(5) lime-soil base conserves: hard surface after the completion of rolling carries out sprinkling maintenance, conserves 7-10 days, to complete
The making of lime-soil base；
(6) mix of stone fragment soil: paving one layer of stone fragment on lime-soil base surface, and sprinkles water on its surface, makes stone fragment
It is all wet, it then uniformly spreads out and spreads a layer of clay on stone fragment surface, using mechanically or manually mix, keep soil and stone fragment tentatively mixed
It closes, mixs on one side sprinkle water while later, and soil and stone fragment is made to be sufficiently mixed bonding, obtain stone fragment soil mixture；
(7) stone fragment layer making and roll: stone fragment soil mixture uniformly paved in lime-soil base, and using land leveller or
Scraper plate flattens road surface, is rolled using the road roller of 12-15t to hard surface after leveling, until hard surface wheelmark depth
Until less than or equal to 5mm, to complete the making of stone fragment layer；
(8) laying of water-permeable brick surface layer: stone fragment layer surface after the completion of rolling is laid with one layer of water-permeable brick, and water-permeable brick is uniformly spread
It is located at stone fragment layer surface and forms surface layer, after the completion of laying, flattened water-permeable brick using flat-plate vibrator, to complete
The laying of water-permeable brick surface layer.
By using above-mentioned technical proposal, in rural area due to lacking drainage system, encounter rainfall it is larger when, it is easy to
Both sides of the road form ponding and influence the passage of road, and water-permeable brick surface layer are arranged in both sides of the road, and since water-permeable brick has
The characteristics of quickly absorbing moisture and permeating water downwards, when encountering larger rainfall, rainwater flows to water-permeable brick surface layer, and permeable
Make rainwater rapid osmotic to underground under the action of brick, prevents rainwater from influencing the passage of whole road in road surface formation ponding, together
When water-permeable brick lower layer use stone fragment layer, saved construction cost.
In conclusion the invention has the following advantages:
The first, the construction method of backroad of the invention, by the way that lime soil layer, and letter are arranged below Portland Cement Concrete Surface Course
Change construction procedure, not only meets the requirement of road construction, while having saved construction cost, allow to be applied on a large scale inclined
Far, the road construction in economic poor area.
The second, it is further saved by increasing content native in lime-soil base in the case where meeting construction requirement
Production cost reduces the damage of road, improves the intensity of road.
Third, the number of plies of lime-soil base can be selected according to construction requirement, and the thickness of every layer of lime-soil base
It is identical, difficulty of construction is reduced, accelerates construction period indirectly.
4th, it by the way that hardening road is arranged in road both sides, not only facilitates pedestrian and walks in both sides of the road, reduce traffic
The generation of accident, while hardening the water-permeable brick surface layer on road has good water permeability, prevent rainwater form ponding on road surface and
Influence the passage of whole road.
Specific embodiment
Invention is further described in detail with reference to embodiments.It should be understood that described in the embodiment of the present invention
Preparation method is only used for illustrating the present invention, rather than limiting the invention, to this hair under concept thereof of the invention
The simple modifications of bright preparation method belong to the scope of protection of present invention.
A kind of embodiment 1, construction method of backroad, includes the following steps:
(1) surveying setting-out: according to construction requirement, survey crew finds original point reference substance in situ face, then in situ face
Upper release road middle line and roadbed sideline；
(2) excavated-in t4 roadbed is modified: cleaning road bed sundries avoids sundries from influencing the construction of road, by roadbed lowered zones
It is filled and led up with soil or stone fragment, it is preferably native, and the roadbed place of filling and leading up is rolled using road roller, until roadbed wheel track depth is less than or waits
Until 5mm, preferably 3mm prevents road bed from out-of-flatness occur and influences subsequent construction；
(3) rendzinas mix: pave one layer lime after resolution in road bed, wherein in lime active calcium oxide and
The gross dry weight of activated magnesia accounts for the 80-85wt% of lime gross dry weight, preferably 82wt%, and lime is using directly plus by the way of water
It is cleared up, after clearing up, after resolution the humidity of lime be 20-30%, preferably 25%, later on the surface of lime
Spray water makes lime surface wet, prevents lime fugitive dust from influencing construction environment, then uniformly spreads out and spread a layer of clay on lime surface,
And the plasticity index of soil is 7-16, soil can according to need one of selection sandy soil, silty soil, and preferably plasticity index is
12 sandy soil, it is preferably mechanical using mechanically or manually mix, for mitigating the labor intensity of operator, make Tu Heshi
Ash is tentatively mixed, and is mixed on one side sprinkle water while later, and soil and lime is made to be sufficiently mixed bonding, is obtained rendzinas and is mixed
Material, and the proportion of lime and soil is 15:85-25:75, in order to improve the intensity of road and save production cost, lime and soil
Proportion be preferably 20:80；
(4) it lime-soil base making and rolls: rendzinas mixture is uniformly paved in road bed, and using land leveller or scrape
Plate flattens road surface, preferably land leveller, is rolled after leveling using the road roller road pavement of 12-15t, in order to save production
And accelerate construction efficiency, the road roller road pavement of preferably 13t is rolled, until roadbed wheel track depth is less than or equal to 5mm
Until, preferably 3mm guarantees the flatness on road surface；
(5) lime-soil base conserves: road surface progress sprinkling maintenance after the completion of rolling, maintenance 7-10 days, and preferably 8 days, from
And complete the making of lime-soil base, lime-soil base with a thickness of 10-20cm, in order to guarantee lime-soil base intensity and
Save the cost, the thickness of lime-soil base are preferably 15cm, and lime-soil base can according to need making multilayer, and every layer of lime
The thickness of soil matrix layer is identical；
(6) Portland Cement Concrete Surface Course making: installation template, and the one layer of coagulating cement that pave in template are distinguished in road surface two sides
Soil, cement concrete can require be selected according to practice of construction, the strength grade of cement concrete is C25, C30, C35,
One of C40, preferably strength grade are the cement concrete of C25, after the completion of paving, use plug-in type and flat vibration immediately
Dynamic device is by the uniform jolt ramming of cement concrete, until road surface does not emerge bubble and outflow water cement mortar, then using plane machine or
Scraper plate flattens road surface, preferably scraper plate, and road pavement is plastered at least twice after leveling, wherein carrying out after leveling primary
Plastering, terminates substantially in cement concrete bleeding, and in pre-hardening state but still wet surface when carries out one-coat plastering, this two
It can also repeatedly be plastered as needed between secondary plastering；
(7) Portland Cement Concrete Surface Course conserves: one layer of plastic foil of road surfacing after the completion of plastering, maintenance 7-10 days, and preferably 8
It, form removal, avoids road pavement from damaging in form removal later, so that the making of Portland Cement Concrete Surface Course is completed,
Portland Cement Concrete Surface Course with a thickness of 10-25cm, in order to guarantee the intensity and save the cost of Portland Cement Concrete Surface Course, cement is mixed
The thickness of solidifying soil surface layer is preferably 15cm.
Quality testing is carried out to the road construction completed under priority condition, wherein the compactness of lime-soil base is more than or equal to
97%, and 7 days without lateral confinement intensity, the compression strength of Portland Cement Concrete Surface Course is 25MPa.
The step of road construction includes: surveying setting-out, the finishing of excavated-in t4 roadbed, rendzinas mix, lime-soil base making
And roll, lime-soil base maintenance, the maintenance of Portland Cement Concrete Surface Course making, Portland Cement Concrete Surface Course, in Portland Cement Concrete Surface Course
Lime soil layer is arranged in lower section, since lime-soil base has good intensity and water stability, while resistance to compression also with higher
Intensity, load assignment ability can effectively disperse the bearing capacity of road, reduce the damage of road, improve the strong of road
Degree, while simplifying construction procedure, not only meet the requirement of road construction, but also saved construction cost, reduced construction period,
Also there is good compression strength simultaneously, allow to apply the road construction in remote, economic poor area on a large scale.
It is in place of embodiment 2, a kind of construction method of backroad, the present embodiment and the difference of embodiment 1, road
Making has hardening road respectively for two sides, and the width for hardening road can according to need and be set as 0.5-1m, and preferably 0.8m hardens road
Length and road equal length, the height of the height and road of hardening road is equal, hardening road using following methods preparation:
(1) surveying setting-out: according to construction requirement, survey crew finds original point reference substance in situ face, then in situ face
Upper release road middle line and roadbed sideline；
(2) excavated-in t4 roadbed is modified: cleaning hardening road bed sundries avoids sundries from influencing the construction of hardening road, will harden
Roadbed lowered zones soil or stone fragment are filled and led up, preferably native, and are rolled using road roller to the hardening roadbed place of filling and leading up, until hardening
Until road bed wheelmark depth is less than or equal to 5mm, preferably 3mm, prevent hardening road bed from out-of-flatness occur and after influencing
Continuous construction；
(3) rendzinas mix: in the lime that hardening road bed paves one layer after resolution, wherein active oxidation in lime
The gross dry weight of calcium and activated magnesia accounts for the 80-85wt% of lime gross dry weight, preferably 82wt%, and lime uses and directly adds water
Mode clears up it, after clearing up, after resolution the humidity of lime be 20-30%, preferably 25%, later in lime
Surface spray water makes lime surface wet, prevents lime fugitive dust from influencing construction environment, then uniformly paves one layer on lime surface
Soil, and the plasticity index of soil is 7-16, soil can according to need one of selection sandy soil, silty soil, and preferably plasticity refers to
The sandy soil that number is 12, it is preferably mechanical using mechanically or manually mix, for mitigating the labor intensity of operator, make soil
It is tentatively mixed with lime, is mixed on one side sprinkle water while later, and soil and lime is made to be sufficiently mixed bonding, obtained rendzinas and mix
Material is closed, and the proportion of lime and soil is 15:85-25:75, in order to improve the intensity on hardening road and save production cost, lime
Proportion with soil is preferably 20:80；
(4) it lime-soil base making and rolls: rendzinas mixture uniformly being paved in hardening road bed, and uses land leveller
Or scraper plate flattens hard surface, preferably land leveller, is rolled using the road roller of 12-15t to hard surface after leveling,
In order to save production and accelerate construction efficiency, the preferably road roller of 13t rolls hard surface, until hard surface wheel
Until mark depth is less than or equal to 5mm, preferably 3mm guarantees the flatness of hard surface；
(5) lime-soil base conserves: hard surface progress sprinkling maintenance after the completion of rolling, maintenance 7-10 days, and preferably 8
It, to complete the making of lime-soil base, lime-soil base with a thickness of 10-20cm, in order to guarantee the strong of lime-soil base
Degree and save the cost, the thickness of lime-soil base are preferably 15cm, and lime-soil base can according to need making multilayer, and every
The thickness of layer lime-soil base is identical；
(6) mix of stone fragment soil: paving one layer of stone fragment on lime-soil base surface, and sprinkles water on its surface, makes stone fragment
It is all wet, it then uniformly spreads out and spreads a layer of clay on stone fragment surface, using mechanically or manually mix, preferably machine mixing, make
Soil and stone fragment tentatively mix, and mix on one side sprinkle water while later, and soil and stone fragment is made to be sufficiently mixed bonding, obtain stone fragment
Native mixture, and the proportion of stone fragment and soil is 10:90-20:80, is produced into improve intensity and the saving on hardening road
This, the proportion of stone fragment and soil is preferably 15:85；
(7) stone fragment layer making and roll: stone fragment soil mixture uniformly paved in lime-soil base, and using land leveller or
Scraper plate flattens hard surface, preferably scraper plate, is rolled using the road roller of 12-15t to hard surface after leveling, in order to
It saves production and accelerates construction efficiency, the preferably road roller of 13t rolls hard surface, until hard surface wheelmark is deep
Until degree is less than or equal to 5mm, preferably 3mm guarantees the flatness of hard surface, so that the making of stone fragment layer is completed, it is broken
Aggregate chips layer with a thickness of 10-20cm, in order to guarantee the intensity and save the cost of stone fragment layer, the thickness of stone fragment layer is preferably
15cm；
(8) laying of water-permeable brick surface layer: stone fragment layer surface after the completion of rolling is laid with one layer of water-permeable brick, convenient for make road surface with
And the rainwater in hardening road face infiltrates through underground as early as possible, avoids the face on road surface and hardening road from forming ponding, water-permeable brick is uniform
It is laid on stone fragment layer surface and forms surface layer, after the completion of laying, flattened water-permeable brick using flat-plate vibrator, thus complete
At the laying of water-permeable brick surface layer.
Quality testing is carried out to the hardening road construction completed under priority condition, wherein the compactness of lime-soil base is in being equal to
97%, and 7 days without lateral confinement intensity, the compactness of stone fragment layer is more than or equal to 97%, and the compression strength of water-permeable brick surface layer is 54MPa.
By the way that hardening road is arranged in road both sides, not only facilitates pedestrian and walk in both sides of the road, reduce traffic accident
Generation, rural area due to lack drainage system, encounter rainfall it is larger when, it is easy to both sides of the road formed ponding and influence
The passage of whole road, and water-permeable brick surface layer is set in both sides of the road, and since water-permeable brick has quickly absorption moisture and makes water
Downwards the characteristics of infiltration, when encountering larger rainfall, rainwater flows to water-permeable brick surface layer, and keeps rainwater fast under the action of water-permeable brick
Speed penetrates into underground, prevents rainwater from influencing the passage of whole road in road surface formation ponding.
Claims (10)
1. a kind of construction method of backroad, characterized by the following steps:
(1) surveying setting-out: survey crew finds original point reference substance in situ face, then in situ face discharge road middle line with
And roadbed sideline；
(2) excavated-in t4 roadbed is modified: cleaning road bed sundries is filled and led up roadbed lowered zones soil or stone fragment, using pressure
Road machine rolls the roadbed place of filling and leading up, until roadbed wheel track depth is less than or equal to 5mm；
(3) rendzinas mix: paving one layer lime after resolution in road bed, and sprinkles water on its surface, then in stone
Gray surface uniformly spreads out and spreads a layer of clay, and using mechanically or manually mix, mixes soil and lime tentatively, mixes while sprinkling water later
It closes, and soil and lime is made to be sufficiently mixed bonding, obtain rendzinas mixture；
(4) it lime-soil base making and rolls: rendzinas mixture is uniformly paved in road bed, and using land leveller or scrape
Plate flattens road surface, is rolled after leveling using the road roller road pavement of 12-15t, until roadbed wheel track depth is less than or equal to
Until 5mm；
(5) lime-soil base conserves: road surface after the completion of rolling carries out sprinkling maintenance, conserves 7-10 days, to complete lime
The making of soil matrix layer；
(6) Portland Cement Concrete Surface Course making: the installation template on road surface, and the one layer of cement concrete that pave in template pave
After the completion, it immediately with plug-in type and flat-plate vibrator by the uniform jolt ramming of cement concrete, bubble and is flowed out until road surface is not emerged
Until cement mortar, then road surface is flattened using plane machine or scraper plate, road pavement is plastered at least twice after leveling；
(7) Portland Cement Concrete Surface Course conserves: one layer of plastic foil of road surfacing after the completion of plastering is conserved 7-10 days, is torn open later
Removing template, to complete the making of Portland Cement Concrete Surface Course.
2. a kind of construction method of backroad according to claim 1, it is characterised in that: lime and soil in step (4)
Proportion be 15:85-25:75.
3. a kind of construction method of backroad according to claim 1, it is characterised in that: active oxidation in the lime
The gross dry weight of calcium and activated magnesia accounts for the 80-85wt% of lime gross dry weight.
4. a kind of construction method of backroad according to claim 1, it is characterised in that: the lime, which uses, directly to be added
Water is cleared up, and the humidity after lime digestion is 20-30%.
5. a kind of construction method of backroad according to claim 1, it is characterised in that: the plasticity index of the soil is
7-16。
6. a kind of construction method of backroad according to claim 1, it is characterised in that: the thickness of the lime-soil base
Degree be 10-20cm, Portland Cement Concrete Surface Course with a thickness of 10-25cm.
7. a kind of construction method of backroad according to claim 1, it is characterised in that: the lime-soil base making
Thickness for multilayer, every layer of lime-soil base is identical.
8. a kind of construction method of backroad according to claim 1, it is characterised in that: the cement concrete it is strong
Spending grade is one of C25, C30, C35, C40.
9. a kind of construction method of backroad according to claim 1, it is characterised in that: distinguish the two sides of the road
Making has hardening road, and the width for hardening road is 0.5-1m, hardens the length on road and the equal length of road, hardens the height on road
It is equal with the height of road.
10. a kind of construction method of backroad according to claim 9, it is characterised in that: the hardening road use with
The preparation of lower section method:
(1) surveying setting-out: survey crew finds original point reference substance in situ face, and roadbed side is then discharged in situ face
Line；
(2) excavated-in t4 roadbed is modified: cleaning hardening road bed sundries fills out hardening roadbed lowered zones soil or stone fragment
It is flat, the hardening roadbed place of filling and leading up is rolled using road roller, until hardening road bed wheelmark depth is less than or equal to 5mm；
(3) it rendzinas mix: sprinkles water in the lime that hardening road bed paves one layer after resolution, and on its surface, then
It uniformly spreads out and spreads a layer of clay on lime surface, using mechanically or manually mix, mix soil and lime tentatively, sprinkle water one on one side later
Side mix, and soil and lime is made to be sufficiently mixed bonding, obtain rendzinas mixture；
(4) it lime-soil base making and rolls: rendzinas mixture uniformly being paved in hardening road bed, and uses land leveller
Or scraper plate flattens hard surface, is rolled using the road roller of 12-15t to hard surface after leveling, until hard surface wheel
Until mark depth is less than or equal to 5mm；
(5) lime-soil base conserves: hard surface after the completion of rolling carries out sprinkling maintenance, conserves 7-10 days, to complete
The making of lime-soil base；
(6) mix of stone fragment soil: paving one layer of stone fragment on lime-soil base surface, and sprinkles water on its surface, makes stone fragment
It is all wet, it then uniformly spreads out and spreads a layer of clay on stone fragment surface, using mechanically or manually mix, keep soil and stone fragment tentatively mixed
It closes, mixs on one side sprinkle water while later, and soil and stone fragment is made to be sufficiently mixed bonding, obtain stone fragment soil mixture；
(7) stone fragment layer making and roll: stone fragment soil mixture uniformly paved in lime-soil base, and using land leveller or
Scraper plate flattens road surface, is rolled using the road roller of 12-15t to hard surface after leveling, until hard surface wheelmark depth
Until less than or equal to 5mm, to complete the making of stone fragment layer；
(8) laying of water-permeable brick surface layer: stone fragment layer surface after the completion of rolling is laid with one layer of water-permeable brick, and water-permeable brick is uniformly spread
It is located at stone fragment layer surface and forms surface layer, after the completion of laying, flattened water-permeable brick using flat-plate vibrator, to complete
The laying of water-permeable brick surface layer.
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| CN113718579A (en) * | 2021-07-30 | 2021-11-30 | 中铁十九局集团有限公司 | Environment-friendly ground construction method |
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