CN205934631U - Quick dehumidification equipment of over-wet soil roadbed - Google Patents
Quick dehumidification equipment of over-wet soil roadbed Download PDFInfo
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- CN205934631U CN205934631U CN201620875740.4U CN201620875740U CN205934631U CN 205934631 U CN205934631 U CN 205934631U CN 201620875740 U CN201620875740 U CN 201620875740U CN 205934631 U CN205934631 U CN 205934631U
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Abstract
The utility model provides a quick dehumidification equipment of overly humid soil road bed, through the synergistic action of traction running gear, hot-blast source, fan housing, tuber pipe, stirring wheel, makes the extremely humid soil quickly dehumidify. The utility model discloses according to the natural moisture content of damp soil filler, compaction control moisture content, osmotic coefficient, air intake value, confirm wind speed, wind temperature, effectively improve the loose local environment of laying the layer damp soil, make local environment's temperature, relative humidity exceed the air intake value that the road bed packed, assist the positive and negative stirring effect of stirring the wheel with turning over simultaneously, make the moisture content of damp soil filler fall to the compaction control moisture content of damp soil rapidly. The utility model has the advantages of being reasonable in structure and convenient in operation, can reduce the wet soil moisture content fast, solved the wet soil and be difficult to reach the technological problem of compaction control moisture content in the stipulated time through tedding because of the moisture content height under the rainy weather condition in south of china, improve wet soil utilization ratio and efficiency of construction greatly, the reduction of erection time practices thrift the cost to low in process cost, economic benefits is showing.
Description
Technical field
The utility model discloses a kind of earth roadbed quick dehumidifying equipment of overly moist；Especially for rainy in southern high-temperature
The over-wet soil roadbed filling in area, using quick dehumidifying equipment so as to be rapidly reached compacting at short notice to control moisture content, realizes
The rapid construction in rainy season.Belong to subgrade construction field of engineering technology.
Background technology
Over-wet soil refers to that moisture content is more than plastic limit moisture content it is necessary to take related technical measures to be acted upon being compacted to
The fine grained soil (particle diameter is less than or equal to the soil more than or equal to gross mass 50% for the granular mass of 0.075mm) of regulation compactness, greatly
Belong to high liquid limit soil, such as high liquid limit admaic earth, granite residual soil, swelled ground etc. more.The over-wet soil distribution of China is wide, natural shape
The distribution of the special soils becoming, has the rule that it is certain, shows certain regionality.Account for the 25% of China's land-based area area south
With the torrid zone, based on subtropical monsoon climate, summer high temperature is rainy in area, winter low temperature and short of rain.Long-term in southern warm
Under effect, under chemical weathering, in the parent rock such as granite, carbonate, form that fine particle content is big, Atterberg Limit and natural contain
Water rate is high and special over-wet soil that have certain swell-shrink characteristic, such as part granite residual soil, admaic earth and swelled ground.These overly moist
Soil is most commonly seen in the expressway construction of south China area.
The conventional method of China's roadbed filling, first passes through field investigation and sampling and carries out indoor CBR test and compaction test,
In the case that CBR meets roadbed requirement, according to tamping curve, using the corresponding optimum moisture content of maximum dry density as subgrade compaction
Control moisture content.
Because southern area over-wet soil natural moisture content is high, the optimum moisture content determining according to conventional compaction control method is low,
Maximum dry density is big, under the conditions of southern rainy climate, filler be difficult to be down to optimum moisture content state from high-moisture percentage it is also difficult to
Reach the requirement of compactness.Simultaneously because fine particle content is big, meet water, easily to expand softening, water stability poor, direct with these over-wet soils
The roadbed filling easily occurs operation phase humidification to expand, dry density reduces, bearing capacity and roadbed integral rigidity decline, and leads to road surface early
Phase destroys.
Commonly used chemical modifying or spoir change and the technical measures such as fill out over-wet soil filled-up ground is punished both at home and abroad.Change
Learning improvement is that Calx is mixed over-wet soil, makes overly moist soil's water content rapid decrease, to meet Subgrade Compaction requirement.Engineering is real
In border, mixing ash in over-wet soil needs two subjobs：It is to disperse agglomerating swelled ground block for the first time, need shelving after mixing ash one week；Filler exists
When paving on road, carry out two stage lime mixing, machinery mixes and stirs and rolls.Because plant equipment and construction process requirement are high, not only engineering is made
Valency is high, and (often side's unit price is from 25 yuan/m3Increase to 65～100 yuan/m3, with specific reference to the difference mixing ash quantity, price is different), and
It is also possible to pollute environment so that this technology is extremely limited in engineering this application of reality, generally only in laboratory study
Middle use.The western China being especially widely distributed in backward swelled ground, there is no the possibility of enforcement.
It is to ship the soil displacement roadbed scope that moisture content substantially meets compaction requirement from elsewhere that spoir changes the technology of filling out
Over-wet soil, on the one hand, can produce and in a large number borrow the soil side of abandoning, cause soil erosion along the line；On the other hand, engineering cost increases in a large number
Plus, land resource waste greatly, environmental destruction serious.So that 1km length, average raising 8m, roadbed top surface 26m be wide, ratio of slope 1:
As a example 1.5 embankment, then need spoir 3.04 × 105m3, borrow soil 3.04 × 105m3, spoir haul distance by 10km, borrow native haul distance to press
20km calculates, and per car can transport 20m every time3Soil, unloaded oil consumption is 50L/100km, and heavily loaded oil consumption is 92L/100km, diesel oil valency
Lattice are pressed 5 yuan/L and are calculated, and need to take over the land for use 23 mu by means of spoir, and the cost of every necromancer increases by 22 yuan.Every kilometer of roadbed spoir, soil is borrowed to increase
Cost is more than 600 ten thousand yuan.
Due to the substantial increase of said method engineering cost, high cost, operation inconvenience, land resource waste very big, water and soil stream
Mistake causes environmental destruction serious, therefore, does not generally adopt in engineering.
At present, south China Roadbed Construction, typically using non-rainfall day, roadbed filling is tedded or
The mode of dry in the sun, makes filler moisture content drop to compacting and controls near moisture content, this process generally requires the time of 2～3 days.
But because southern area is based on the torrid zone, subtropical monsoon climate, during the construction of summer high temperature rainy season, when roadbed filling is dried
Between cannot ensure, have a strong impact on project progress.This problem has become the main difficult technical built the road in southern difficult ground.
At present, special soils filler is there is no to ted specializing in of performance equipment both at home and abroad.
Therefore, the utility model proposes a kind of earth roadbed quick dehumidifying equipment of overly moist, make can be used for the mistake of roadbed filling
Even if the construction period of wet soil also will not be delayed long in rainy season.
Utility model content
The purpose of this utility model is to overcome the deficiency of prior art, for the rainy feature of southern climates, provides one
Plant the earth roadbed quick dehumidifying equipment of overly moist rational in infrastructure, easy to operate, can quickly reducing over-wet soil moisture content.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described quick dehumidifying equipment includes drawing vehicle with walking machine
Structure, pathogenic wind-warm blast velocity control mechanism, airduct, fan housing, turn wheel, described traction walking mechanism is provided with engine, steering wheel, speed change system
System, engine provides hot air source and provides driving power for traction walking mechanism；It is provided with fan housing, wind at traction walking mechanism rear
It is provided with least one set in cover and turns wheel, the described wheel that turns makees circumferencial direction rotating campaign by engine driving；Described pathogenic wind-warm
The first airduct and hot air source UNICOM are passed through in blast velocity control mechanism one end, and the other end extends to traction walking mechanism by the second airduct
Rear is simultaneously in fan housing top face, is provided with multiple the 3rd wind extending to through fan housing top surface in fan housing on the second airduct
Pipe.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described traction walking mechanism is tractor.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described pathogenic wind-warm blast velocity control mechanism is provided with three shelves
Position：
I grade of air temperature is 60-75 DEG C, wind speed is 15-25m/s；
II grade of air temperature is 75-85 DEG C, wind speed is 25-35m/s；
III grade of air temperature is 85-95 DEG C, wind speed is 35-45m/s.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described fan housing length is 2 meters, and quick dehumidifying equipment is every
Hour processing 200m～500m over-wet soil pine paves the way base, make over-wet soil roadbed filling by natural moisture content be down to compacting control aqueous
Rate.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described fan housing is provided with the reel being driven by engine
Lying device, reel lying device paves to dried soil cloth for keeping out rain；The long 210m of cloth for keeping out rain, wide 2.0m；When over-wet soil roadbed
Construction finishes, or a certain lamination real finish estimated when wanting rainfall, with reel lying device to wet down and after being compacted at once
Soil layer paves cloth for keeping out rain, prevents rainfall from the overly moist soil layer being compacted is had a negative impact；After rain or next layer of over-wet soil
Before layer construction, cloth for keeping out rain is withdrawn with reel lying device.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described cloth for keeping out rain is double composite membrane plastic color strip cloth；
Material is polyethylene, and quality is 150g/m2～200g/m2, every width 210m length, 2.0m width.
A kind of earth roadbed quick dehumidifying equipment of overly moist of this utility model, described over-wet soil is residual selected from high liquid limit soil, granite
One of long-pending soil, subgrade compaction controls moisture content to be based on maximum load capacity determination.
Using this utility model method of carrying out rapid construction earth roadbed to overly moist, comprise the steps：
The first step：Roadbed filling initial aqueous rate and the determination of compacting control moisture content
Live soil sampling measures natural moisture content, carries out compaction test and CBR (California bearing ratio) test, with maximum CBR
It is worth corresponding moisture content and control moisture content as overly moist soil compaction；
Second step：Over-wet soil filler infiltration coefficient, air-entry value measure
Measure the osmotic coefficient k of over-wet soil by results of permeability tests and pressure plate testsAnd soil-water characteristic curve, according to
Soil-water characteristic curve determines the air-entry value a of over-wet soil；
3rd step：Pave, wet down, compacting
Highway and Class I highway roadbed are divided into a construction section according to 200m；Common road roadbed is divided into according to 500m
One construction section；
For osmotic coefficient ks≥10-5M/s, during soil-water characteristic curve air-entry value a≤5kPa, over-wet soil loose laying depth controls
In 20cm～22cm, maximum particle diameter controls in 5cm～8cm；Using temperature be 60 DEG C -75 DEG C, speed be 15m/s-25m/s heat
Wind, after 15s～30s is dried, is compacted；
For osmotic coefficient ksFor：10-8m/s≤ks＜ 10-5M/s, soil-water characteristic curve air-entry value a are：5kPa ＜ a≤
During 100kPa, over-wet soil loose laying depth controls in 22cm～25cm, and maximum particle diameter controls in 2cm～5cm, is 75 using temperature
DEG C -85 DEG C, speed be the hot blast of 25m/s～35m/s, after 15s～30s is dried, be compacted；
For osmotic coefficient ks＜ 10-8M/s, during soil-water characteristic curve air-entry value a ＞ 100kPa, over-wet soil loose laying depth control
In 25cm～30cm, maximum particle diameter controls 2cm to system, using temperature be 85 DEG C～95 DEG C, speed be the heat of 35m/s～45m/s
Wind, after 15s～30s is dried, is compacted.
This utility model adopts a kind of earth roadbed quick dehumidifying equipment of above-mentioned overly moist, makes the high liquid limit that natural moisture content is higher
The moisture content of admaic earth, granite residual soil etc. drops to compacting within a short period of time and controls moisture content.Guarantee in Used in Rainy Seasons of Southern Cities,
Less, discrete non-rainfall day can be utilized, improve compaction rate and the efficiency of roadbed.By lying device to dried
Soil is covered, even if the rainy day can also carry out engineering construction, project progress and roadbed quality is effectively ensured.
In conventional roadbed construction method, make filler moisture content be reduced to compacting and control the method for moisture content mainly to have two kinds,
One kind is lowering of humidity by physical means, turns over by the natural wind of non-rainfall day, temperature and solar radiation (sunlight irradiation) and by turnplow machine
The means mixed are tedded, and it requires continuous longer being used for non-rainfall day tedding, turn the moment only by micro-judgment.For south
Generally it is respectively necessary for 2 days, 1 day and 3 days and non-rainfall day above for the high liquid limit admaic earth in side, granite residual soil and swelled ground
Over-wet soil is down to compacting from natural moisture content and is controlled moisture content by the method that could pass through to ted.And south China area rainfall is relatively
Many, especially in rainy season, continuously non-rainfall day is less for a long time.If taking physical method to carry out wet down it is easy to lead to the duration
Delay, construction costs is greatly improved.
Another is chemical wet down, brings it about chemical reaction by filling quick lime, produces substantial amounts of heat to steam
Send out the moisture in soil, make high liquid limit soil sand, to reduce the purpose of filler moisture content simultaneously.Engineering in practice, over-wet soil
In mix ash need two subjobs：It is to disperse agglomerating swelled ground block for the first time, need shelving after mixing ash one week；When filler on the way paves,
Carry out two stage lime mixing, machinery mixes and stirs and rolls.Because plant equipment and construction process requirement are high, not only construction costs height (every Fang Dan
Valency is from 25 yuan/m3Increase to 65～100 yuan/m3, with specific reference to the difference mixing ash quantity, price is different), but also ring may be polluted
Border, so that this technology is extremely limited in engineering this application of reality, generally only uses in laboratory study.Especially
The western China being widely distributed in backward swelled ground, there is no the possibility of enforcement.
The utility model proposes carry out rapid construction using the earth roadbed quick dehumidifying equipment of overly moist is earth roadbed to overly moist,
In the paving process of filler, moisture content, infiltration coefficient, air-entry value are controlled according to over-wet soil filler natural moisture content, compacting, determines
Wind speed, pathogenic wind-warm, by the external environment of human intervention filler, make over-wet soil roadbed filling be rapidly reduced to compacting control aqueous
Rate, improves its wet down speed, with the purpose reaching roadbed rapid construction, do not delay because of rainy season.Wherein ted for filler
Quick dehumidifying equipment, the tuyere diameter of each blowing apparatus is 5cm, and the distance between air outlet is 10cm, and power is 2500W,
Then an area coverage is 1.5*2=3m2Equipment need 99 air outlets.According to the computing formula of work(, this two fast prompt drops
Wet equipment can heat production 1.782 × 10 in 1h9J.In 15s, high liquid limit admaic earth can drop to compacting control from natural moisture content
Moisture content processed, can complete the subgrade compaction work of a 200m construction section in two quick dehumidifying equipments of 3.5h.And 1L diesel oil can
Heat production 1.55 × 107J, utilizes diesel oil 402L altogether in 3.5 hours, oil consumption is 5 yuan/L, and that is, the quick wet down cost of every cube of filler is only
Increase by 10 yuan about.
The utility model has the advantages that：
1st, greatly shorten over-wet soil and be down to, from natural moisture content, the time that compacting controls moisture content.South China weather bar
Under part, the over-wet soil such as the granite residual soil of 200m length, high liquid limit admaic earth, swelled ground, using naturally tedding wet down, generally needs
Take the continuously non-rainfall day do not waited for 1 day～3 days.And adopt this utility model, for different over-wet soil grogs, suitable by setting
Pathogenic wind-warm and wind-speed gear, it is possible to achieve complete wet down within 3h～5h, substantially increase efficiency of construction.
2nd, greatly improve the utilization rate of over-wet soil.When directly utilizing over-wet soil filling roadbed, naturally turned over using traditional
The construction method shone, needs longer continuously non-rainfall day, and under the conditions of southern rainy climate, it is several that this long duration occurs
Rate very little, over-wet soil is often extremely difficult to compacting and controls moisture content, is also unable to reach compaction requirement, engineering is mostly not after compacting
Obtain not change using spoir and fill out, cause to take up an area and soil erosion by means of spoir is a large amount of, cause ecological environment heavy damage.Using this practicality
Compacting measure that is new and coordinating routine it is only necessary to 1 non-rainfall day it is possible to realize to the wet down of 1 layer of overly moist soil layer, compacting
With rain-proof masking.In time in rainy season it is also possible to directly utilize over-wet soil direct filling roadbed.
3rd, there is good economic benefit.Relatively conventional ted subgrade construction measure, this utility model is to climatic environment bar
Part dependence is little, can realize over-wet soil construction in whole year and wet down speed improves more than 8 times, substantially reduce the engineering time, section
The expenses such as personal services, space expenses, installation cost are saved；This utility model, due to needing to increase fuel consumption, often utilizes 1m3, need
Increase by 10 yuan about of expense；And the measure of filling out is changed using spoir, need to increase by more than 20 yuan of expense；Using mixing quick lime,
Need to increase by more than 65 yuan of expense.Article one, highway utilizes millions of cubes of over-wet soil, can save cost tens million of to more than one hundred million
Unit.Therefore this utility model has significant economic benefit.
4th, construction quality can effectively be guaranteed.Wet down method is tedded using traditional natural, over-wet soil is extremely difficult to be compacted control
Moisture content, because the duration limits, is often rolled in the state of controlling moisture content higher than compacting, and being extremely difficult to compactness will
Ask, after causing the earth roadbed work of overly moist, easily produce sedimentation and deformation, thus causing the strain cracking on road surface, serious threat traffic peace
Entirely, increased maintenance costs.And this utility model enables the quick wet down of over-wet soil, can strictly control over-wet soil in compacting control
Be compacted under moisture content, make roadbed reach compaction quality and carry ratio requirement, thus ensured the deformation after roadbed work and
Strength stability, can be prevented effectively from subgrade settlement disease it is ensured that Pavement Condition and traffic safety, reduce maintenance costs.
In sum, this utility model, in the paving process of filler, is controlled according to over-wet soil filler natural moisture content, compacting
Moisture content processed, infiltration coefficient, air-entry value, determine wind speed, pathogenic wind-warm, by quick dehumidifying equipment, control for different overly moist great soil groups
Suitable pathogenic wind-warm and wind speed, effectively improve the local environment of loose laying over-wet soil, make temperature, the relative humidity of local environment
Exceed the air-entry value of roadbed filling, be aided with the rotating stirring action turning wheel simultaneously, make the moisture content of over-wet soil filler rapid
Drop to overly moist soil compaction control moisture content, and cooperative mechanical rain-proof covering methods it is ensured that south rainy under the conditions of mistake
Wet soil roadbed rapid construction, solve over-wet soil under the conditions of south China rainy climate because moisture content high-leveled and difficult with by tedding
Reach the technical barrier that compacting controls moisture content in stipulated time, greatly improve over-wet soil utilization rate and efficiency of construction, shorten work
Phase, saving construction cost, and process costs are low, and roadbed quality is good, remarkable in economical benefits.
Brief description
Fig. 1 is using Hainan high liquid limit red-clay-filling material moisture content after the process of quick dehumidifying equipment over time.
Fig. 2 is Hainan high liquid limit red-clay-filling material soil-water characteristic curve.
Fig. 3 is that Hainan high liquid limit red-clay-filling material teds moisture content over time naturally using scene.
Fig. 4 is this utility model quick dehumidifying equipment structural representation.
In Fig. 4,1--- draws walking mechanism, 2--- pathogenic wind-warm blast velocity control mechanism, 3--- first airduct, 4--- second wind
Pipe, 5--- the 3rd airduct, 6--- turns wheel, 7--- reel lying device, 8--- cloth for keeping out rain, 9--- hot air source, 10--- fan housing.
Specific embodiment
Referring to accompanying drawing 4, quick dehumidifying equipment of the present utility model includes drawing walking mechanism 1, pathogenic wind-warm blast velocity control mechanism
2nd, airduct, fan housing 10, turn wheel 6, described traction walking mechanism 1 is provided with engine, steering wheel, speed change system, and engine provides
Hot air source 9 simultaneously provides driving power for traction walking mechanism 1；It is provided with fan housing 10 at traction walking mechanism 1 rear, set in fan housing 10
Least one set is had to turn wheel 6, the described wheel 6 that turns makees circumferencial direction rotating campaign by engine driving；Described pathogenic wind-warm wind speed
The first airduct 3 and hot air source 9 UNICOM are passed through in controlling organization 2 one end, and the other end extends to traction walking mechanism by the second airduct 4
1 rear is simultaneously in fan housing 10 top face, is provided with and multiple extends in fan housing 10 through fan housing 10 top surface on the second airduct 4
3rd airduct 5；
Described traction walking mechanism 1 is tractor；
Fan housing 10 is provided with the reel lying device 7 being driven by engine, and reel lying device 7 paves to dried soil
Cloth for keeping out rain 8；The long 210m of cloth for keeping out rain, wide 2.0m；When over-wet soil subgrade construction finishes, or real the finishing of a certain lamination is expected will at once
During rainfall, with reel lying device, to wet down and the soil layer after being compacted paves cloth for keeping out rain, prevents rainfall to the mistake being compacted
Wet soil layer has a negative impact；After rain or before the construction of next layer of overly moist soil layer, by cloth for keeping out rain reel lying device and join
Close artificial withdrawal；
Cloth for keeping out rain 8 is double composite membrane plastic color strip cloth, and material is polyethylene, and quality is 150g/m2～200g/m2, every width
210m length, 2.0m width.
Using this utility model at the subgrade construction scene of Haikou to Tunchang highway K6+220～K6+420 section
Test.Collection in worksite high liquid limit admaic earth disturbed sample, carries out basic physical property index and engineering properties test.Laboratory test
Result shows：It is 30% that the natural moisture content of sea village highway high liquid limit admaic earth is more than its plastic limit for 31.8%, and liquid limit is
34%, judge this soil as overly moist high liquid limit soil；Natural dry density is 1.46g/cm3.Compacting control with maximum load capacity as target
It is 22.5% that the compacting that method processed obtains controls moisture content, and the corresponding dry density of its tamping curve is 1.74g/cm3.
The average annual temperature in Hainan Region is high, the temperature difference is little, high-temperature duration is long.Hainan be the most area of national rainfall it
One, and heavy rain number of times position occupies the leading place in the whole country.Rainfall concentrates on annual 5～October.This test section is in Hainan Chengmai area, experimental period
Between be 8～September in 2012, its rain fall is shown in Table 1.Within this 2 months time, the period of not rainfall in 1 day has 24, even
The period of continuous not rainfall in two days has 14.
Table 1 Hainan Chengmai area 8～September duration of raining statistical table
Note：√ represents that the same day can construct, × represent that the same day can not construct.
In the section of K6+220～K6+420 common 200m length, quick wet down construction is carried out using this utility model to roadbed,
After determining that the roadbed filling in this section is overly moist high liquid limit soil, carry out results of permeability tests and soil-water characteristic curve test respectively,
The infiltration coefficient obtaining high liquid limit admaic earth is 2 × 10-8M/s, air-entry value is 30kPa；According to the utility model proposes quick
The principle that the gear of dehumidifying equipment selects, determines and carries out quick wet down using II grade.
The high 8m of this test section embankment, top width 26m, ratio of slope is 1:1.5, the width of one layer of bottom surface is 50m, this subgrade soils
Every layer of loose laying depth of filler is 0.25m, need to be densified to every layer of 0.2m, need to press 40 layers altogether.Compacting with maximum load capacity as target
Moisture content is controlled to be 22.5%, compacted dry density is 1.74g/cm3.
Carry out the quick wet down in scene using II grade of quick dehumidifying equipment, equipment once can cover roadbed filling area and be
1.5*2=3m2, for maximally utilizing not duration of raining, in the lower half embankment for 50m for the bottom width, using 4 dehumidifying equipments with
When work, the section filler wet down work of 200m length can be completed in 3.5h；In the upper half embankment for 26m for the bottom width, adopt 2
Platform dehumidifying equipment works simultaneously, can complete the subgrade compaction work of the construction section of 200m length and width in 3.5h.
After the work of quick wet down completes the 60% of the gross area, heavy road roller starts the compacting work of roadbed.
During equipment first time quick wet down, the soil sample of wet down point is taken to carry out the tracking and testing of moisture content, every 5s soil sampling is entered
Row water cut test, after quick wet down 40s, rule is as shown in Figure 1 over time for its moisture content.The soil of high liquid limit admaic earth
Water characteristic curve is as shown in Figure 2.
As shown in Figure 1, high liquid limit admaic earth drops to compacting control moisture content in quick dehumidifying equipment by natural moisture content
In the case of being in II grade, only need 15s, the gear setting before thus proving and the time of quick wet down are correct.By Fig. 2
Understand, the air-entry value of high liquid limit admaic earth is 30kPa, in the case of being far longer than air-entry value, high liquid limit is red viscous for matric suction
Soil's water content is in the rapid decrease stage, and Fig. 1, exactly using the condition of the extraneous high temperature providing and fast wind, makes high liquid limit red viscous
Soil has just reached its air-entry value, to reach the purpose of quick wet down in very short time.
From economic considerations, 1L diesel oil can heat production 1.55 × 107Diesel oil 402L is utilized altogether, oil consumption is 5 yuan/L in J, 3.5h,
Then often side unit price from 25 yuan/m3Increase to 30～35 yuan/m3.
Consider from the construction period, because rainfall in having 19 days of Chengmai area 8～September, in remaining 42 days, daily fall
The rain period only continues 2～4h, that is, still provide 4～5h time and carry out quick wet down；Finally smoothly complete in 8～September
200m length, the test section subgrade compaction work of raising 8m, carry out compacted dry density detection through live sand replacement method, using this method
The dry density of the roadbed of compaction moulding is all higher than 1.74g/cm3, meet compacting and control prescription.Therefore this method greatly carries
The high rainy season construction efficiency of roadbed, ensure that Subgrade Compaction Quality simultaneously.
And constructed in Hainan Hai Tun highway K6+950～K7+150 using Traditional foundations construction method.Tradition side
Method adopts the corresponding moisture content of maximum dry density in wet method tamping curve to control moisture content as the compacting of roadbed, is 20%.
It is 1.78g/cm that its compacting controls dry density3.Loose laying depth is controlled to 25cm.The roadbed filling wet down work of test section is taken
Carried out using the solar radiation of natural environment and the mode of wind, the monitoring knot of the natural air drying speed of test section high liquid limit admaic earth
Fruit is as shown in Figure 3.As seen from Figure 3 in natural environment, excavate the high liquid limit soil that moisture content is 32% about, no matter top layer or
Internal layer soil, after dry in the sun in 1 day, moisture content is reduced to less than 30%, and after dry in the sun in 2 days, still not up to compacting control is aqueous for moisture content
Rate, has a strong impact on the duration, and in construction period, Chengmai area rainfall more frequently suitably teds condition it is impossible to provide, therefore should
What test section was finally taken is that spoir changes the mode filled out.
By spoir cushion, then need spoir 6.08 × 104m3, borrow soil 6.08 × 104m3, spoir haul distance press 10km, borrow soil fortune
Calculate away from by 20km, per car can transport 20m every time3Soil, unloaded oil consumption is 50L/100km, and heavily loaded oil consumption is 92L/100km, bavin
Oil price lattice press 5 yuan/L calculate, 4.6 mu need to be taken over the land for use by means of spoir, then often side unit price from 25 yuan/m3Increase to 40 yuan/m3.
Claims (8)
1. the earth roadbed quick dehumidifying equipment of a kind of overly moist, described equipment includes drawing walking mechanism, pathogenic wind-warm blast velocity control mechanism, wind
Pipe, fan housing, turn wheel it is characterised in that：Described traction walking mechanism is provided with engine, steering wheel, speed change system, and engine carries
Heat supply wind regime simultaneously provides driving power for traction walking mechanism；Traction walking mechanism rear be provided with fan housing, be provided with fan housing to
Few one group turns wheel, and the described wheel that turns makees circumferencial direction motion by engine driving；Described pathogenic wind-warm blast velocity control mechanism one end
By the first airduct and hot air source UNICOM, the other end extends to traction walking mechanism rear by the second airduct and is in fan housing top
Above face, multiple the 3rd airducts extending to through fan housing top surface in fan housing are provided with the second airduct.
2. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 1 it is characterised in that：The described wheel that turns passes through
Engine drives makees circumferencial direction rotating campaign.
3. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 1 it is characterised in that：Drawing walking mechanism is
Tractor.
4. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 1 it is characterised in that：Pathogenic wind-warm blast velocity control machine
Structure is provided with three gears；
I grade of air temperature is 60 DEG C～75 DEG C, wind speed is 15m/s～25m/s；
II grade of air temperature is 75 DEG C～85 DEG C, wind speed is 25m/s～35m/s；
III grade of air temperature is 85 DEG C～95 DEG C, wind speed is 35m/s～45m/s.
5. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 4 it is characterised in that：When fan housing length is 2
Meter Shi, quick dehumidifying equipment processes 200m～500m over-wet soil pine per hour and paves the way base, so that over-wet soil roadbed filling is contained by natural
Water rate is down to compacting and is controlled moisture content.
6. a kind of earth roadbed quick dehumidifying equipment of the overly moist according to claim 1-5 any one it is characterised in that：Fan housing
It is provided with the reel lying device being driven by engine, reel lying device paves to dried soil cloth for keeping out rain.
7. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 6 it is characterised in that：Cloth for keeping out rain is double compound
Film plastic color strip cloth.
8. a kind of earth roadbed quick dehumidifying equipment of overly moist according to claim 1 it is characterised in that：Described over-wet soil is selected from
One of high liquid limit admaic earth, granite residual soil, swelled ground.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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2016
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111676749B (en) * | 2020-06-03 | 2021-10-01 | 安徽华仁路桥工程有限公司 | Roadbed earthwork construction structure in rainy season |
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