CN110424203A - A kind of rainy season wet & soft subgrade filling construction method - Google Patents
A kind of rainy season wet & soft subgrade filling construction method Download PDFInfo
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- CN110424203A CN110424203A CN201910695130.4A CN201910695130A CN110424203A CN 110424203 A CN110424203 A CN 110424203A CN 201910695130 A CN201910695130 A CN 201910695130A CN 110424203 A CN110424203 A CN 110424203A
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- quick lime
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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
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/04—Foundations produced by soil stabilisation
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C3/00—Foundations for pavings
- E01C3/06—Methods or arrangements for protecting foundations from destructive influences of moisture, frost or vibration
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention discloses a kind of rainy season wet & soft subgrade filling construction method, and this method comprises the following steps: S1, water content of banketing test and the design of quick lime volume；S2, test section construction；S3, stock；S4, sub-layer processing；S5, surveying and locating；S6 paves；S7, mix；S8 flattens light pressure；S9 is rolled；S10, maintenance；S11, later period check.The present invention can not only guarantee the quality of Roadbed Soil in construction, reduce subgrade deformation, bedding frost boiling, emit mud phenomenon, can more accelerate the efficiency of subgrade construction, save duration and cost, ensured the quality and efficiency of rainy season subgrade construction；While having ensured roadbed filling quality, the progress of roadbed filling construction is also accelerated, job site personnel machinery work holdup phenomenon is reduced, and vehicle waits the current time along reducing.
Description
Technical field
The present invention relates to a kind of roadbed filling construction methods, relate particularly to a kind of rainy season wet & soft subgrade filling construction side
Method is mainly used for the construction of each standard highway base, railway bed, small airport runway bed course, belongs to Roadbed Construction Technology
Field.
Background technique
Usually, more demanding to quality of filling soil and water content in roadbed filling construction, it bankets and is soaked by rainfall
Bubble or water content are excessively high, can all cause filling roadbed the quality problems that grout, intensity are insufficient, deflection value is excessive occur.To,
How rainfall influence to subgrade construction is reduced into an important research topic in highway engineering construction.
Subgrade construction is carried out in rainy season, rainfall can seriously affect the stability of construction speed and roadbed.It is filled out in rainy season construction
Native water content is high, and low bearing capacity, stability is poor, is easily deformed, and when construction usually " spring " phenomenon occurs and can not be compacted, often
Digging soil processing can only be done, however, most of construction area lacks sandstone material, and exploits and changes and fill out time-consuming, cost
It is high.Traditional fill placement technique mainly using the method tedded, and dries method and has the disadvantage in that when facing this problem
1, long construction period, deficiency in economic performance:
Banket moisture content height during rainy season, and larger with construction optimum moisture content gap, summer need to dry 2-3 fine day, spring
Autumn needs 4-5 fine day, can be only achieved construction requirement.And, rainy season longer area rainy in weather, it is obvious that moisture content is reduced by sunning
It is not all right, it does not roll also and rains sometimes, fine days can only be waited again, long construction period seriously affects construction speed；Mechanical work holdup number
It greatly increases, improves project cost cost.
2, optimum moisture content is difficult to hold:
Over-wet soil is during tedding, it is difficult to which precisely grasp water-cut variation situation is past to reach optimum moisture content state
Toward relatively low or higher due to tedding the over or under moisture content that causes to banket, cause to banket and roll leakiness, quality occurs in roadbed
Problem.
In order to guarantee the stabilization and construction speed of roadbed, it is necessary to take economically and reasonably reinforcement measure, keep Udoll base most
Become the soil matrix with certain bearing capacity fastly, not only can guarantee the stability of roadbed, but can reduce as far as possible rainfall to subgrade construction into
The influence of degree.Therefore, need to develop one kind can ensure that the quality of rainy season subgrade construction and the rainy season wet & soft subgrade of efficiency are filled and applied
Work method is to solve the key point of above-mentioned technical problem.
Summary of the invention
For many shortcomings and deficiencies present in above-mentioned background technique, the present invention is improved and has been innovated to this, mesh
Be a kind of quality that can not only can guarantees Roadbed Soil in construction is provided, reduce subgrade deformation, bedding bursts and become muddy when a thaw sets in, emits mud
Phenomenon can more accelerate the efficiency of subgrade construction, save duration and cost, ensured the quality and efficiency of rainy season subgrade construction.
Another goal of the invention of the invention is also to accelerate roadbed filling construction while having ensured roadbed filling quality
Progress, reduce job site personnel machinery work holdup phenomenon, and vehicle waits the current time along reducing.
In order to solve the above problem and reach above-mentioned goal of the invention, a kind of rainy season wet & soft subgrade filling construction method of the present invention
It is to be realized by using following design structure and using following technical solution:
A kind of rainy season wet & soft subgrade filling construction method, this method comprises the following steps:
S1, water content of banketing test and the design of quick lime volume: the wet soft water content banketed of test, then according to Udoll
It is tested with quick lime chemical principle and Field Compactness, calculates the dosage of quick lime under the soft water content of banketing of DIFFERENT WET；
Test section construction: S2 designs the construction for carrying out test section, according to quick lime volume to determine the phase in work progress
Parameter is closed, the parameter includes the paving thickness, machine tonnage and number of rolling of quick lime and Udoll；
Stock: S3 according to the width, thickness and the compactness of requirement for respectively filling section roadbed, is calculated and is taken native quantity
And stowed location calculates every square meter roadbed and needs quick lime quantity according to water content and the design of quick lime volume of banketing；
S4, sub-layer processing: removing the sundries on sub-layer surface first, then with land leveller that mud caused by rainfall is complete
Portion removes, and finally carries out multipass with 18~21T three-roll road roller and rolls back and forth, until sub-layer surfacing, closely knit, detection road
Base compactness and intensity are allowed to meet design requirement；
S5, surveying and locating: the qualified every 5m in sub-layer surface of detection set a section put in, skirt piles, and in roadbed two
Side edge setting indicates stake, marks out base's designed elevation with red paint in stake and each layer of pine spreads altitude line；
S6 paves: paving including paving early period and the later period paves two parts；
S7, mix: mix is using stable native mixing machine；
S8 flattens light pressure: after the native mix of lime punishment is uniform, should tentatively be flattened with land leveller immediately, straightway
Leveling should be flattened from two sides to centre, and curved section should flatten inwardly from outside；
S9 is rolled: when rolling, being rolled first according to the determining relevant parameter of test section construction, first with wheeled pressure road
Machine is rolled in roadbed overall with, is then rolled again using smooth-wheeled roller, and sequence and the light pressure sequence consensus of leveling are rolled；
S10, maintenance: after lime punishment soil has been rolled and has been detected by compactness, Ying Jinhang moisture-keeping maintaining, to guarantee to tie
Structure layer keeps the steady growth of intensity in control environment；
S11, later period check: after maintenance, periodically according to quality requirement to compactness, absolute altitude, flatness, apparent size
It carries out checking measurement comprehensively, to repair unqualified place in time.
As above-mentioned another the preferred technical solution of the present invention, in the S1, the maximum dry density banketed is 2.1g/
Cm3, optimum moisture content 13.9%, and the natural moisture content to banket is between 20%~23%；
In the S2, the paving thickness of Udoll is 30cm, and machine tonnage 20T, number of rolling is 4 times.
As the above-mentioned preferred technical solution of the present invention, in the S3, to keep quick lime dosage more accurate, quick lime
Size controlling selects levigate quick lime within 30mm.
As the above-mentioned further preferred technical solution of the present invention, in the S4, the compactness, smooth of sub-layer is checked
Degree, transverse slope, elevation, width, to soil matrix must be carried out rolling with 18-21T three-roll road roller or equivalent road roller inspection 3~
4 times, repairing treatment is carried out if phenomena such as loose, spring occurs in surface.
It is tight before construction and in work progress in the S5 as the above-mentioned preferred technical solution of further step of the present invention
Lattice surveying and locating measures after compacting in time according to the red paint strict control wet soft loose laying depth to banket marked in instruction stake
Whether designed elevation is met.
As the above-mentioned technical solution still further preferably of the present invention, in the S6, paving the early period includes: first
A small amount of quick lime is just mixed when taking native field usage mining machine and dump truck with conjunction soil to always mixing 5% or so of ash quantity, it can
Dump truck is uniformly packed into afterwards with excavator mix, and quick lime reacts with banketing during transportation, at this time Udoll
Water content can be reduced suitably, then paved on roadbed, slightly put down, the doses remaining that paves rendzinas；
The later period paves when including: that remaining quick lime paves, and first should draw square in thick flat earth material surface lime
Lattice guarantee that every lattice area is roughly equal, calculate the area and quick lime usage amount of every lattice, pave quick lime when must use scraper plate
It strikes off, make to pave uniformly and is covered with entire square grid.
As the above-mentioned technical solution also again again still more preferably of the present invention, in the S7, the mixing when mix
It closes speed preferably control in 1.2~1.5KM/h, mix depth invades 5~10mm of sub-layer, so that the old and new layer banket bonding, surely
Not there are interlayer between given layer and sub-layer, mix direction is drawn close from outermost to center, and detection rendzinas water content in due course
Whether meet compacting standard, the measure for whether increasing quick lime volume taken, until the rendzinas color after mix should reach one
It causes.
As the above-mentioned also more further preferred technical solution again again of the present invention, in the S8, tire is used after leveling
Road roller quickly rolls one time, and when exposing the place of out-of-flatness, Ying Caiyong tooth harrow will harrow pine 5cm or more at out-of-flatness, so
Afterwards again mixing mixture carry out it is levelling, then quickly roll it is primary, to prevent unexpected rainfall from impacting to roadbed when construction, often
Secondary leveling should ensure that roadbed overall with is made into the transverse drainage slope to two sides inclination 2%, in favor of subgrade drainage.
As the above-mentioned also more further preferred technical solution again again of the present invention, in the S9, rolling speed is answered
Control is in 2.0Km/h, and wheelspan overlapping 1/2 or so when rolling, number of rolling is maintained at 6~8 times, rendzinas surface in roller compaction process
It should keep wet, when if there is spring, loose phenomenon, position lime punishment soil should be dug out in time and re-start mix,
Every layer roll after should detect compactness at once, and draw table, sum up the relationship of compactness and number of rolling using as subsequent
The guidance foundation of construction；
In the S10, the curing time is no less than 7 days.
As the above-mentioned also more further preferred technical solution again and again of the present invention, in the S1, Udoll and life
Lime chemical principle process difference is as follows:
Lime digestion reaction: quick lime hydration heat evaporates portion of water, is Ca (OH) in resolution2During
A certain amount of moisture can be absorbed, to achieve the effect that reduce Udoll base water content；
CaO+H2O=Ca (OH)2+ heat；
Crystallization reaction: loose soil particle cementation is integral, because of the Ca (OH) after crystallization2Solubility is smaller, further
Improve the water stability of rendzinas；
Ca(OH)2+nH2O→Ca(OH)2·nH2O；
Carbonation reaction: lime after resolution further with the CO in air2Reaction generates the CaCO of micro-crystalline3, into one
Step enhances the cementation of grogs；It (is CO2)
Ca(OH)2+CO2→CaCO3+H2O。
Generated beneficial effect is the present invention compared with prior art:
1, the present invention has construction convenience, punishes wet soft filling roadbed construction method using quick lime and constructs, only
Need to uniformly pave one layer of quick lime on wet & soft subgrade soil, be rolled after mixing machine mix；
2, the present invention has widely applicable property, is suitble to various types of Roadbed Soils: swelled ground, cohesive soil, loess；It is suitble to
Different moisture content bankets: adjusting the optimum moisture content to banket by changing quick lime volume, meets compactness to reach
Effect；
3, the present invention has superior property, is on the one hand intensity height, test result shows to banket punishes by quick lime
The shearing strength that roadbed can be significantly improved extends the service life of entire pavement structure；On the other hand it is good frost resistance, bankets
The integral anti-freezing of roadbed can be enhanced by carrying out quick lime punishment, and with the increase of quick lime volume, integral anti-freezing performance is better；Also
It on the one hand is that water-resisting property is good, quick lime and banketing chemically reacts, and promotes to banket to form cohesion soil particle, cuts off capillary
The conveying of middle water increases the water isolating of soil；
4, the present invention can not only guarantee the quality of Roadbed Soil in construction, reduce subgrade deformation, bedding is bursted and become muddy when a thaw sets in, it is existing to emit mud
As can more accelerate the efficiency of subgrade construction, save duration and cost, ensured the quality and efficiency of rainy season subgrade construction；
5, the present invention also accelerates the progress of roadbed filling construction, reduces while having ensured roadbed filling quality
Job site personnel machinery work holdup phenomenon, and vehicle waits the current time along reducing.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing, in which:
Fig. 1 is construction flow chart of the invention；
Table 1 is that quick lime of the invention mixes gauge table；
Table 2 is material table of the invention；
The mechanical equipment table of the invention of table 3；
Wherein: S1-is indicated in figure to banket water content test and the design of quick lime volume, S2-test section construction, S3-
Stock, S4-sub-layer processing, S5-surveying and locating, S6-pave, and S7-mix, S8-leveling is gently pressed, and S9-is rolled,
S10-maintenance, S11-later period check.
Specific embodiment
In order to realize the present invention technological means, create feature, reach purpose and effect is easy to understand, tie below
It closes attached drawing and specific embodiment and further detailed description is made to technical solution of the present invention, it should be noted that In
In the case where not conflicting, the features in the embodiments and the embodiments of the present application be can be combined with each other, below with reference to the accompanying drawings simultaneously
It is in conjunction with the embodiments next that the present invention will be described in detail.
Embodiment
This construction method is suitable for the construction of each standard highway base, railway bed, small airport runway bed course.
One, preparation of construction
1. making an on-the-spot survey construction site in detail according to " geologic prospect report ", being familiar with periphery underground pipe canal, neighbouring building；
2. carry out live enclosing and field of constructing in both sides of the road gutter setting, make in field not ponding, guarantee construction machine
Tool road it is unimpeded.Water power, interim living facilities are installed before construction as needed.
3. the content of pair design data and bidding document carries out comprehensive scene verification and construction investigation, the especially cubic metre of earth and stone
Quantity, the data related with subgrade construction such as traffic, vegetation, building and facility removal, geological survey；
4. pair embankment fill material carries out check and sampling test, its maximum dry density, optimum moisture content, liquid limit, plasticity are measured
" Highway Roadbed Construction Technology specification " (JTGF10) and " highway engineering quality are pressed in index or grading analysis, filling intensity etc., test
First civil engineering of check evaluation criterion " (JTG F80/1) and " calcium oxide and content of magnesia in chemical industry lime stone
Measurement " (GB/T 15057.2) processing.
Two, water content of banketing test and the design of quick lime volume
The wet soft water content banketed is test, is then tested according to rendzinas chemical reaction is theoretical with Field Compactness, measuring and calculating
Out under the soft water content of banketing of DIFFERENT WET quick lime dosage, enable lime punishment soil reach optimum moisture content, in order to be pressed
It is real, so that lime Subgrade fill construction had not only been can guarantee filled soils but also the requirement shortened the construction period can be reached.On-site test shows
The maximum dry density banketed is 2.1g/cm3, optimum moisture content 13.9%, and the natural moisture content to banket is 20%~23%
Between.
The wet soft quick lime incorporation gauge table to banket of different moisture content is as shown in table 1, which, which is that different moisture content is wet, soft fills out
The quick lime volume value range of soil.
| Udoll natural moisture content (%) | W1+3 | W1+4 | W1+5 | W1+6 | W1+7 | W1+8 |
| Quick lime the optimum mix amount (%) | 3 | 3~5 | 5~6 | 6~8 | 7~9 | 8~10 |
| Udoll natural moisture content (%) | W1+9 | W1+10 | W1+11 | W1+12 | W1+13 | W1+14 |
| Quick lime the optimum mix amount (%) | 9~11 | 10~12 | 11~14 | 12~15 | 13~15 | 14~16 |
Three, test section is constructed
The construction for carrying out test section is designed, according to quick lime volume to determine the relevant parameter in work progress, including ash
Native paving thickness, machine tonnage and number of rolling, wherein the paving thickness of Udoll is 30cm, and machine tonnage 20T is rolled
Pass is 4 times.
Four, it stocks up
According to the width, thickness and the compactness of requirement for respectively filling section roadbed, calculates and take native quantity and stacking position
It sets, according to water content and the design of quick lime volume of banketing, calculates every square meter roadbed and need quick lime quantity, quick lime dosage must
Need be accurate, partial size must control within 30mm, preferentially select levigate quick lime, and the quick lime fineness of phase homogenous quantities is bigger
Its surface area is bigger, reacts more abundant with Udoll, and the hardened effect that absorbs water is better.
Five, sub-layer is handled
The sundries for removing sub-layer surface is all removed mud caused by rainfall with land leveller, with 18~21T, tri- wheel load
Road machine carries out multipass and rolls, and until sub-layer surfacing, closely knit, detects Subgrade Compaction and intensity is allowed to meet design and want
It asks.
Then, compactness, flatness, transverse slope, elevation, the width etc. for checking sub-layer, must use 18-21T to soil matrix
Three-roll road roller or equivalent road roller roll inspection 3~4 times, if surface there is phenomena such as loose, spring must be into
Row processing.
Six, surveying and locating
The qualified every 5m in sub-layer surface of detection set a section put in, skirt piles, and setting refers in roadbed both sides of the edge
Show stake, marks out base's designed elevation with red paint in stake and each layer of pine spreads altitude line.
Meanwhile stringent surveying and locating before construction and in work progress, it is strictly controlled according to the red paint marked in instruction stake
Make the wet soft loose laying depth to banket, measured in time after compacting and whether meet designed elevation, when construction to hold " it is peaceful high not low, rather
Scrape mend " principle, control construction, forbid subsidizing, so as not to generate skin effect phenomenon.
Seven, it paves
Quick lime paves and carries out suddenly in two steps: just mixing when taking native field usage mining machine and dump truck with conjunction soil first
Enter a small amount of quick lime, quick lime volume about always mixes 5% or so of ash quantity at this time, can be uniformly packed into afterwards certainly with excavator mix
Unload automobile, quick lime reacts with banketing during transportation, and the water content of Udoll can be reduced suitably at this time.Then on road
It paved on base, slightly put down, the doses remaining that paves rendzinas.
When remaining quick lime paves, square lattice first should be drawn in thick flat earth material surface lime, guarantee that every lattice area is big
It causes equal, calculates the area and quick lime usage amount of every lattice.Pave quick lime when must be struck off with scraper plate, guarantee pave uniformly
And it is covered with entire square grid.
Eight, mix
Mix is using stablizing native mixing machine, it is noted that mix speed and depth during mix, according to on-site actual situations
Mix speed is preferably controlled in 1.2~1.5KM/h, and special messenger is arranged and checks that mix depth, mix depth invade 5~10mm of sub-layer,
So that the old and new's layer bankets bonding, forbid between stabilized zone and sub-layer that there are interlayers.Mix should be drawn close from outermost to center,
It to detect whether rendzinas water content meets compacting standard in due course in the process, and the measure for whether increasing quick lime volume taken.
Rendzinas color should reach consistent after mix.
Nine, the light pressure of leveling
It after the native mix of lime punishment is uniform, should tentatively be flattened with land leveller immediately, straightway leveling should be from two sides
It is flattened to centre, curved section should flatten inwardly from outside.It is quickly rolled with rubber-tyred roller one time after leveling, when exposing not
When smooth place, Ying Caiyong tooth harrow will harrow pine 5cm or more at out-of-flatness, and then the progress of mixing mixture is levelling again, then fastly
Speed rolls once.To prevent unexpected rainfall from impacting to roadbed when construction, leveling should ensure that roadbed overall with is made into two every time
Oblique 2% transverse drainage slope is rolled, in favor of subgrade drainage.
Ten, it rolls
According to test section construction, determining relevant parameter is rolled, and is first ground in roadbed overall with tire roller
Pressure, is then rolled using smooth-wheeled roller again, rolls sequence and the light pressure sequence consensus of leveling.Rolling speed should be controlled in 2.0Km/
H, wheelspan overlapping 1/2 or so when rolling, number of rolling is maintained at 6-8 times, and rendzinas surface should be kept wet in roller compaction process, such as
When spring, loose phenomenon occurs in fruit, position lime punishment soil should be dug out in time and re-starts mix.Every layer roll after should be i.e.
Detection compactness is carved, and draws table, sums up the relationship of compactness and number of rolling using the guidance foundation as subsequent construction.
11, it conserves
After lime punishment soil has been rolled and has been detected by compactness, Ying Jinhang moisture-keeping maintaining, to guarantee structure sheaf suitable
The steady growth of intensity is kept in suitable environment, curing time should be determined according to live weather, general no less than 7 days, and curing period
Between need close traffic, forbid other vehicle pass-throughs in addition to sprinkling truck.
12, the later period checks
After maintenance, periodically compactness, absolute altitude, flatness, apparent size are checked comprehensively according to quality requirement
Measurement, to repair unqualified place in time.
13, technological principle
Quick lime is one of common inorganic coagulation material in highway, and main component is calcium oxide (CaO), is additionally contained
Magnesia (MgO) and calcium silicates (CaSiO3).Studies have shown that following a series of physical can occur after mixing quick lime in Udoll
Effect, chemical reaction:
1, lime digestion reacts: quick lime hydration heat evaporates portion of water, is Ca (OH) in resolution2During
Also a certain amount of moisture can be absorbed, to achieve the effect that reduce Udoll base water content；
CaO+H2O=Ca (OH)2+ heat
2, crystallization reaction: loose soil particle cementation is integral, because of the Ca (OH) after crystallization2Solubility is smaller, into one
Step improves the water stability of rendzinas；
Ca(OH)2+nH2O→Ca(OH)2·nH2O
3, carbonation reaction: lime after resolution further with the CO in air2Reaction generates the CaCO of micro-crystalline3, into
One step enhances the cementation of grogs；It (is CO2)
Ca(OH)2+CO2→CaCO3+H2O
It is acted on by above-mentioned series reaction, radical change has occurred in the property of Udoll.Udoll starts conglomeration, most preferably
Water content increases, and Atterberg Limit increases, and secondary crystallization structure initially forms, so that the plate body of soil, intensity and stability are also corresponding
It improves.
14, process flow
Construction flow chart is as shown in Figure 1.
15, material and equipment
Material table of the invention is as shown in table 2, which is main material table of the invention.
Mechanical equipment table of the invention is as shown in table 3, which wants construction equipment allocation list for of the invention.
16, quality assurance measure
1, quality control standard
" Highway Roadbed Construction Technology specification " JTG F10
" first civil engineering of Road Engineering Quality Checking And Evaluation standard " (JTG F80/1)
" measurement of calcium oxide and content of magnesia in chemical industry lime stone " (GB/T 15057.2)
2, key Quality Control
(1) sub-layer compactness
The construction of this project roadbed filling carries out in rainy season just, and roadbed is easy accept a surrender rain shadow sound appearance frost boiling, rebound phenomena,
Rendzinas must clear all before filling mud and to carry out multipass and rolls compactness to guarantee sub-layer, and sub-layer surface is forbidden
There is out-of-flatness, loose, springing.
(2) quick lime
Select Lime Quality that must control at III grade or more, the content of calcium oxide and magnesia should meet code requirement and
Guarantee that quick lime sieving uses, size controlling is within 30mm.Pave quick lime when should ensure that uniformly, and must be mixed according to test
Amount design control dosage.
(3) parameter index is rolled
The purpose of test section is exactly to determine that road roller model, the speed of travel, number of rolling, lime punishment soil pine paving are thick
The parameter indexes such as degree, optimum moisture content, quick lime punishment soil must set special messenger's strict guarantee ginseng during later period filling construction
Effective use of number index, forbids change parameter privately, arbitrarily carries out placement grinding.
(4) it conserves
It is strictly conserved as required, guarantees effectively maintenance number of days, keep road bed wet, vehicle is forbidden arbitrarily to lead to
Row.
17, Safety assurance measures
1, all personnel enters the necessary safe wearing cap of construction area, and Normalization rule protective articles, administrative staff must be every
It carries out safety and tells somebody what one's real intentions are；
2, the haulage vehicle that bankets will be frequently checked, maintain, and guarantee vehicle driving and braking system especially during rainy season
It is intact, when carrying out mechanical work on roadbed, it is necessary to arrange special messenger to command, prevent collision accident；
3, pave quick lime when, operator should wear trousers, long sleeves and wear mask, eyeshade.
18, performance analysis
Engineering practice proves that the use of this engineering method also accelerates roadbed filling while having ensured roadbed filling quality
The progress of construction reduces job site personnel machinery work holdup phenomenon, and vehicle waits the current time along reducing, and obtains
Preferable social assessment.
1, Economic and Efficiency Analysis
Quick lime punishment construction adds additional quick lime Master Cost and mixing machinery expense, labour cost, in conjunction with this item
Mesh actual conditions, quick lime fee of material add mixing machinery expense, labour cost to calculate according to 348 yuan/side, and scene has used 600 sides altogether
Quick lime, construction cost increase by 208800 yuan of cost；
Quick lime punishes the operating speed during construction accelerates rainy season, shortens the construction period, has saved mechanical and people
The work holdup expense of member, reduces the management cost of project management department.Through calculating, quick lime punishment construction is saved the duration 15 days altogether, it is mechanical and
Personnel's work holdup expense is calculated according to 6800 yuan/day, is saved the work holdup altogether and is lost 102000 yuan, project management department's management cost is according to 420000/
The moon calculates, and saves 210000 yuan of management cost altogether.
In conclusion using quick lime punishment construction, saving construction cost 102000+210000-208800=103200 is first altogether.
2, social benefit is analyzed
In the construction of rainy season roadbed filling, rainfall can cause roadbed to generate serious frost boiling, rebound phenomena, and contain because banketing
Water rate is excessively high to be filled in time, and construction site miriness is wet and slippery, and it is very big that reorganization and expansion road protects logical pressure, and the engineering method can
Speed is filled in quickening, and because of the hardening function and seepage capability of quick lime, the roadbed after filling is made to have preferable drainability,
To reduce the logical pressure of guarantor.
19, application example
1, dimension test section (K74+000~K86+054.59) accessible by road uses the engineering method to carry out roadbed during rainy season and fills out
Construction is built, project construction total length is 12.05km, and roadbed filling is 210,000 sides, and soil property is clay along the line.
2, the 4th contract section (K57+000~K74+000) accessible by road is tieed up, project construction total length is 17km, roadbed filling
For 16.9 ten thousand m3, soil property is clay along the line.
3, six Lan Gonglu Gu salt all tunnel test sections (K25+300~K34+160), 8.86 ㎞ of overall length, roadbed filling 84
Ten thousand m3, soil property is clay along the line.
Finally, it should be noted that the above described is only a preferred embodiment of the present invention, being not to the present invention
Make the limitation of other forms, any person skilled in the art changed possibly also with the technology contents of the disclosure above or
It is modified as equivalent variations of equivalent embodiments.But without departing from the technical solutions of the present invention, technology according to the present invention
Essence any simple modification, equivalent variations and remodeling to the above embodiments, still fall within the protection of technical solution of the present invention
Range.
Claims (10)
1. a kind of rainy season wet & soft subgrade filling construction method, it is characterised in that: this method comprises the following steps:
S1, water content of banketing test and the design of quick lime volume: the wet soft water content banketed of test, then according to Udoll and life
Lime chemical principle and Field Compactness are tested, and the dosage of quick lime under the soft water content of banketing of DIFFERENT WET is calculated；
S2, test section construction: designing the construction for carrying out test section according to quick lime volume, to determine the related ginseng in work progress
Number, the parameter includes the paving thickness, machine tonnage and number of rolling of quick lime and Udoll；
Stock: S3 according to the width, thickness and the compactness of requirement for respectively filling section roadbed, is calculated and is taken native quantity and heap
Position is put, according to water content and the design of quick lime volume of banketing, every square meter roadbed is calculated and needs quick lime quantity；
S4, sub-layer processing: removing the sundries on sub-layer surface first, then with land leveller that mud caused by rainfall is all clear
It removes, finally carries out multipass with 18~21T three-roll road roller and roll back and forth, until sub-layer surfacing, closely knit, detection roadbed pressure
Solidity and intensity are allowed to meet design requirement；
S5, surveying and locating: the qualified every 5m in sub-layer surface of detection set a section put in, skirt piles, and in roadbed two sides
Edge setting indicates stake, marks out base's designed elevation with red paint in stake and each layer of pine spreads altitude line；
S6 paves: paving including paving early period and the later period paves two parts；
S7, mix: mix is using stable native mixing machine；
S8 flattens light pressure: after the native mix of lime punishment is uniform, should tentatively be flattened with land leveller immediately, straightway leveling
It should be flattened from two sides to centre, curved section should flatten inwardly from outside；
S9 is rolled: when rolling, being rolled according to the determining relevant parameter of test section construction, is first existed with tire roller first
It is rolled in roadbed overall with, is then rolled again using smooth-wheeled roller, roll sequence and the light pressure sequence consensus of leveling；
S10, maintenance: after lime punishment soil has been rolled and has been detected by compactness, Ying Jinhang moisture-keeping maintaining, to guarantee structure sheaf
The steady growth of intensity is kept in control environment；
S11, later period check: after maintenance, periodically carrying out according to quality requirement to compactness, absolute altitude, flatness, apparent size
Check measurement, comprehensively to repair unqualified place in time.
2. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S1, fill out
Soil maximum dry density be 2.1g/cm3, optimum moisture content 13.9%, and the natural moisture content to banket 20%~23% it
Between；
In the S2, the paving thickness of Udoll is 30cm, and machine tonnage 20T, number of rolling is 4 times.
3. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that:
In the S3, to keep quick lime dosage more accurate, the size controlling of quick lime selects levigate life stone within 30mm
Ash.
4. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S4, inspection
The compactness, flatness, transverse slope, elevation, width for looking into sub-layer must use 18-21T three-roll road roller or equivalent to soil matrix
Road roller roll inspection 3~4 times, carries out repairing treatment if phenomena such as loose, spring occurs in surface.
5. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S5, In
With stringent surveying and locating in work progress before construction, spread according to the wet soft pine banketed of the red paint strict control marked in instruction stake
Thickness measures whether meet designed elevation in time after compacting.
6. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S6, institute
State that pave early period include: just to mix a small amount of quick lime when taking native field usage mining machine and dump truck with conjunction soil first to total
5% or so of ash quantity is mixed, can uniformly be packed into afterwards dump truck with excavator mix, quick lime occurs with banketing during transportation
Reaction, the water content of Udoll can be reduced suitably at this time, then paved on roadbed, slightly put down, the doses remaining that paves lime
Soil；
The later period paves when including: that remaining quick lime paves, and first should draw square lattice in thick flat earth material surface lime, protect
Demonstrate,prove that every lattice area is roughly equal, calculate the area and quick lime usage amount of every lattice, pave quick lime when must be struck off with scraper plate,
Make to pave uniformly and is covered with entire square grid.
7. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S7, institute
Mix speed when stating mix is preferably controlled in 1.2~1.5KM/h, and mix depth invades 5~10mm of sub-layer, in favor of the old and new's layer
It bankets bonding, there are interlayers between stabilized zone and sub-layer, and mix direction is drawn close from outermost to center, and detects stone in due course
Whether dirt water content meets compacting standard, takes the measure for whether increasing quick lime volume, until the lime ashen after mix
Pool should reach consistent.
8. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: whole in the S8
It is quickly rolled with rubber-tyred roller one time after flat, when exposing the place of out-of-flatness, Ying Caiyong tooth harrow will harrow pine at out-of-flatness
5cm or more, then mixing mixture carries out levelling again, then quickly rolls primary, prevents unexpected rainfall to roadbed when construction
It impacts, leveling should ensure that roadbed overall with is made into the transverse drainage slope to two sides inclination 2% every time, in favor of subgrade drainage.
9. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: in the S9, grind
Pressure speed should be controlled in 2.0Km/h, and wheelspan overlapping 1/2 or so when rolling, number of rolling is maintained at 6~8 times, stone in roller compaction process
Dirt surface should keep wet, when if there is spring, loose phenomenon, should dig out in time the position lime punishment soil and again into
Row mix, every layer roll after should detect compactness at once, and draw table, sum up the relationship of compactness and number of rolling to make
For the guidance foundation of subsequent construction；In the S10, the curing time is no less than 7 days.
10. a kind of rainy season wet & soft subgrade filling construction method according to claim 1, it is characterised in that: wet in the S1
Weak soil is distinguished as follows with quick lime chemical principle process:
Lime digestion reaction: quick lime hydration heat evaporates portion of water, is Ca (OH) in resolution2During can also inhale
A certain amount of moisture is received, to achieve the effect that reduce Udoll base water content；
CaO+H2O=Ca (OH)2+ heat；
Crystallization reaction: loose soil particle cementation is integral, because of the Ca (OH) after crystallization2Solubility is smaller, further improves
The water stability of rendzinas；
Ca(OH)2+nH2O→Ca(OH)2·nH2O；
Carbonation reaction: lime after resolution further with the CO in air2Reaction generates the CaCO of micro-crystalline3, further increase
The strong cementation of grogs；It (is CO2)
Ca(OH)2+CO2→CaCO3+H2O。
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| CN111676749A (en) * | 2020-06-03 | 2020-09-18 | 安徽华仁路桥工程有限公司 | Construction method for roadbed earthwork in rainy season |
| CN111794029A (en) * | 2020-06-24 | 2020-10-20 | 中国十七冶集团有限公司 | Lime soil filling construction method |
| CN112534984A (en) * | 2020-11-09 | 2021-03-23 | 中冶南方都市环保工程技术股份有限公司 | Method for improving soft clay into planting soil |
| CN112551987A (en) * | 2020-12-22 | 2021-03-26 | 苏交科集团股份有限公司 | Preparation method for quickly recycling over-wet soft soil into light filling soil |
| CN112627154A (en) * | 2020-12-16 | 2021-04-09 | 浙大城市学院 | Water network zone lime solidified soil test section filling design method |
| CN112982050A (en) * | 2021-01-27 | 2021-06-18 | 绍兴市城投再生资源有限公司 | Regenerated roadbed base filler and regenerated roadbed construction method |
| CN113186934A (en) * | 2021-05-10 | 2021-07-30 | 昆山市建设工程质量安全监督站 | Construction method for deep soft soil foundation pit |
| CN115058931A (en) * | 2022-07-01 | 2022-09-16 | 中交路桥建设有限公司 | Soil roadbed filling construction method |
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| CN112627154A (en) * | 2020-12-16 | 2021-04-09 | 浙大城市学院 | Water network zone lime solidified soil test section filling design method |
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| CN112551987B (en) * | 2020-12-22 | 2022-09-02 | 苏交科集团股份有限公司 | Preparation method for quickly recycling over-wet soft soil into light filling soil |
| CN112982050A (en) * | 2021-01-27 | 2021-06-18 | 绍兴市城投再生资源有限公司 | Regenerated roadbed base filler and regenerated roadbed construction method |
| CN113186934A (en) * | 2021-05-10 | 2021-07-30 | 昆山市建设工程质量安全监督站 | Construction method for deep soft soil foundation pit |
| CN113186934B (en) * | 2021-05-10 | 2022-08-12 | 昆山市建设工程质量安全监督站 | Construction method for deep soft soil foundation pit |
| CN115058931A (en) * | 2022-07-01 | 2022-09-16 | 中交路桥建设有限公司 | Soil roadbed filling construction method |
| CN115058931B (en) * | 2022-07-01 | 2023-11-17 | 中交路桥建设有限公司 | Soil roadbed filling construction method |
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Application publication date: 20191108 |