CN207244626U - The equipment of high altitude localities asphalt concrete core dam construction - Google Patents

The equipment of high altitude localities asphalt concrete core dam construction Download PDF

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Publication number
CN207244626U
CN207244626U CN201720876806.6U CN201720876806U CN207244626U CN 207244626 U CN207244626 U CN 207244626U CN 201720876806 U CN201720876806 U CN 201720876806U CN 207244626 U CN207244626 U CN 207244626U
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dust
temperature
dam
asphalt concrete
asphalt
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王海艳
娄旭峰
陈龙
刘典忠
刘建发
韩伟
肖恩尚
石峰
孙亮
周培祥
陆卫东
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Sinohydro Foundation Engineering Co Ltd
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Sinohydro Foundation Engineering Co Ltd
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Abstract

The utility model discloses a kind of equipment of high altitude localities asphalt concrete core dam construction, including：Cold feed proportioning system, drying system, heat-conducting oil heating system, miberal powder feed system, MIXING SYSTEM CONTROLLED BY, dust pelletizing system, wherein, dust pelletizing system includes：For isolating the partition plate of useless dust of useful dust and particle diameter of the particle diameter more than or equal to 0.075mm less than 0.075mm；For useful dust to be delivered to the quick conveyer of mixing building；For the balance cock being output to useless dust automatically in real time in dust collection hole.The equipment of the utility model, the outlet temperature of bituminous concrete to be laid can be adjusted in real time according to the temperature of asphalt concrete, improve the efficiency of heating surface, reduce energy loss, and bituminous concrete is prepared to useless dust output in real time to the dust collection after front and rear flue gas separation and is cheated, burn-down of electrical machinery is avoided, improves the service life of equipment, improves preparation efficiency.

Description

The equipment of high altitude localities asphalt concrete core dam construction
Technical field
It the utility model is related to hydraulic and hydroelectric engineering field, more particularly to a kind of high altitude localities asphalt concrete core dam The method of construction.
Background technology
With the fast development of domestic water conservancy construction of hydropower plant, process range, depth, earth formation present complicate, Diversification.In the prior art, when carrying out asphalt concrete core dam construction, need to often be carried out according to WR and hydropower construction specification, As provided in specification：
1st, could construct when the lowest temperature is less than 5mm more than 0 DEG C, wind-force less than 4 grades, intra day ward；
2nd, during asphalt concrete, the skin temperature for the lower floor's asphalt concrete layer being formerly laid with need to be 70 It can just continue be laid with asphalt concrete layer above more than DEG C；
3rd, the thickness for the asphalt concrete layer that individual layer is laid with cannot be more than 25cm；
4th, after asphalt concrete, rolled using the small vibrating less than 1.5t, to ensure laying Bituminous concrete is compacted；
5th, when carrying out asphalt concrete core dam construction, alkaline bone material need to be used, bitumen aggregate ratio 6.8%-7.1% it Between；
6th, when progress dam shell material fills, when the lowest temperature is below -10 DEG C, to stop constructing.
According to above-mentioned specification, in more than 3000 meters of height above sea level, often occur daily minimal tcmperature less than 0 DEG C, wind-force be more than 4 grades, High altitude localities of the intra day ward more than 5mm cannot then carry out the construction of asphaltic concrete core wall.
But due to the development of hydraulic and hydroelectric engineering construction, need often in high altitude localities operation, these areas are high and cold to be lacked Oxygen, rarefaction of air, daily minimal tcmperature are even less than -20 DEG C, and long-term wind-force is more than 4 grades, and there is small sleet in when, and (intra day ward is sometimes big In 10mm), in these areas, the composition physical and mechanical property of asphalt material and bituminous concrete can be subject to altitude environment factor Influence, it is therefore desirable to for these regional actual conditions develop it is a kind of be both suitable for local condition, also ensure that construction quality and Safety, the construction method for improving construction efficiency.
The content of the invention
The purpose of this utility model is exactly to overcome the above-mentioned problems of the prior art, there is provided a kind of high altitude localities The equipment of asphalt concrete core dam construction, can adjust pitch coagulation to be laid in real time according to the temperature of asphalt concrete The outlet temperature of soil, improves the efficiency of heating surface, reduces energy loss, and by after the front and rear flue gas separation of bituminous concrete preparation The output in real time of useless dust cheated to dust collection, avoid burn-down of electrical machinery, improve the service life of equipment, improve preparation efficiency.
In order to realize the above-mentioned purpose of the utility model, the high altitude localities asphalt concrete core dam of the utility model is applied The equipment of work includes：For transporting the cold feed proportioning system using the local sand gravel of high altitude localities as the aggregate of raw material；Match somebody with somebody with cold The drying system for being used to receive and dry the aggregate of its transport of material system connection, according to the temperature pair of asphalt concrete Aggregate is heated；The heat-conducting oil heating system heated according to the temperature of asphalt concrete to pitch System；For supplying the miberal powder feed system of miberal powder；Divide with drying system, miberal powder feed system and the asphalt tank for containing pitch And the aggregate after miberal powder and heating, pitch Lian Jie not be carried out to the MIXING SYSTEM CONTROLLED BY of mix processing, so as to from the mix of MIXING SYSTEM CONTROLLED BY Output meets the bituminous concrete of outlet temperature at the machine outlet in building；Transported with drying system, MIXING SYSTEM CONTROLLED BY and hot mineral aggregate and be Unite the dedusting system for being used to the dust-laden flue gas containing powder generated and gas containing powder be separated by filtration processing after burning connected respectively System；Wherein, the dust pelletizing system includes：It is less than for isolating useful dust and particle diameter of the particle diameter more than or equal to 0.075mm The partition plate of the useless dust of 0.075mm；For useful dust to be delivered to the quick conveyer of mixing building；For by useless dust The balance cock being output to automatically in real time in dust collection hole.
Further, the dust pelletizing system further includes：Rack；Rack-mounted primary dust removing device, its air inlet lead to Cross connecting tube and the drying system gas delivery port and hot mineral aggregate transport system in can produce the system of the gas containing powder Gas delivery port is connected；The two-stage dust removal separated in rack and inside it with primary dust removing device by the partition plate Device；Wherein, the quick conveyer is placed in the primary dust removing device, and the balance cock is placed in the secondary ash collector It is interior.
Wherein, the partition plate tiltably-mounted is between the primary dust removing device and the secondary ash collector, and described quick The input terminal of conveyer is placed in below the partition plate.
Wherein, the balance cock is placed at the dust mouth of the secondary ash collector.
Further, being used for the bituminous concrete after laying and Transition Materials progress product for super existing stone roller weight standard is further included Three stone roller heavy-duty machines that font rolls.
Wherein, the MIXING SYSTEM CONTROLLED BY has the vibrating screen for being used for sieving five kinds of particle diameter aggregates, sets and the dedusting thereon The aspiration of negative pressure mouth of system connection.
Wherein, the dust collection hole is below the dust mouth of the secondary ash collector.
Further, further include：The finished product bin being arranged on below the machine outlet of mixing building, it is defeated from machine outlet to store The bituminous concrete gone out；Ring is located at around finished product bin and its entrance is connected with the outlet of the heat-conducting oil heating system Conduction pipe, so as to which the conduction oil pumped out after heated asphalt tank was drained conduction pipe, utilizes the heat pair of conduction oil carrying Finished product bin heats；Be arranged on for store mineral aggregate and pitch storage bin in and its inlet be connected with the outlet of conduction pipe Logical heating component, so that the heat carried using the conduction oil from conduction pipe outflow heats storage bin.
Further, the thermal conductive pipe outer cladding is used for the insulating layer kept the temperature.
Preferably, the insulating layer is by phenolic resin, polyurethane, rubber-plastic sponge, polyethylene, polystyrene foam, glass Any of cotton, rock wool are made.
Further, further include with the drying system, heat-conducting oil heating system, miberal powder feed system, MIXING SYSTEM CONTROLLED BY, remove The control system that dirt system connects respectively.
In conclusion compared with prior art, the high altitude localities asphalt concrete core dam construction of the utility model Equipment has the beneficial effect that following aspect：
1st, the equipment of the utility model, dust pelletizing system can carry out the dust-laden flue gas containing powder generated after burning and gas containing powder Processing is separated by filtration, the useful dust isolated quickly directly is delivered to miberal powder feed system is reused, and incite somebody to action Bituminous concrete prepares the useless dust output in real time after front and rear flue gas separation and is cheated to dust collection, avoid in the prior art because The occurrence of useless dust blocks electronic discharge valve and screw conveyor and burns out motor, that improves relevant device uses the longevity Life, improves preparation efficiency；
2nd, the equipment of the utility model, drying system and heat-conducting oil heating system have receiver respectively, so that each During mix bituminous concrete to be laid, heating temperature of the related system to mineral aggregate and pitch is controlled according to required outlet temperature Degree, avoids causing the feelings such as paving material deficiency or overheat all the time with same outlet temperature mix mineral aggregate and pitch in the prior art The generation of condition, is greatly improved the efficiency of heating surface, reduces energy loss, saves the energy.
3rd, the equipment of the utility model, there is ring to set the thermal conductive pipe around finished product bin and the peace being connected with thermal conductive pipe The heating component in the storage bin for storing mineral aggregate and pitch is put, so as to be taken using the conduction oil to pitch heating The heat of band heats finished product bin and storage bin, makes full use of the waste heat of conduction oil, it is ensured that raw material is preserved in storage bin Temperature, and solve extremely frigid zones because temperature is low and caused by ask from the bituminous concrete heat of mixing building output is lost quickly Topic, makes full use of the energy, saves the energy.
Hereinafter, the utility model embodiment is described with reference to each attached drawing.
Brief description of the drawings
Fig. 1 is the flow chart of the method for the utility model high altitude localities asphalt concrete core dam construction；
Fig. 2 is the bottom partial schematic diagram of the asphalt concrete core dam of the utility model；
Fig. 3 is the temperature field-effect figure of the asphaltic concrete core wall of the utility model.
Fig. 4 is the schematic diagram in the trench area that the utility model is formed；
Fig. 5 is that the front and rear earth-rock dam shell material level that rolls when the utility model carries out sand gravel material upper dam experiment is write music for a song Line chart；
Fig. 6 is the structure diagram for the heat-preserving equipment that the utility model uses；
Fig. 7 is the structure diagram of the utility model dust pelletizing system；
Fig. 8 is the structure diagram of the utility model primary dust removing device；
Fig. 9 is the left hand view of primary dust removing device shown in Fig. 8；
Figure 10 is the equipment component schematic diagram of the asphalt concrete core dam construction of the utility model.
Embodiment
As shown in Figure 10, the equipment component schematic diagram constructed for the asphalt concrete core dam of the utility model, as seen from the figure, The equipment of the utility model includes：For transporting the cold feed proportioning system using the local sand gravel of high altitude localities as the aggregate of raw material 2；What is be connected with cold feed proportioning system 2 is used to receive and dry the drying system of the aggregate of its transport, according to asphalt coagulation The temperature of soil heats aggregate；The heat conduction heated according to the temperature of asphalt concrete to pitch Heating system for oil 29；For supplying the miberal powder feed system of miberal powder；With drying system, miberal powder feed system and for containing pitch Asphalt tank 24 connect respectively and the aggregate after miberal powder and heating, pitch carried out to the MIXING SYSTEM CONTROLLED BY of mix processing, so as to from mixing Output meets the bituminous concrete of outlet temperature at the machine outlet of the mixing building 26 of syzygy system；With drying system, MIXING SYSTEM CONTROLLED BY Divide with what hot mineral aggregate delivery system connected respectively for carrying out filtering to the dust-laden flue gas containing powder generated after burning and gas containing powder From the dust pelletizing system 10 of processing；Wherein, dust pelletizing system includes：It is greater than or equal to the useful powder of 0.075mm for isolating particle diameter The partition plate of the useless dust of dirt and particle diameter less than 0.075mm；For useful dust to be delivered to the quick conveyer of mixing building；With In the balance cock being output to useless dust automatically in real time in dust collection hole.
Specifically, as shown in Figure 10, aggregate of the storage using local sand gravel as raw material, bone in the stock ground 1 of the utility model Material ships classification and is deposited in stock ground, and different aggregates is transported to the cold dispensing of each cold feed proportioning system 2 respectively by loading machine In bucket 3.Aggregate is transported to the oblique skin of feeding from 4 frequency conversion of the small discharging adhesive tape machine feed under cold batch hopper 3, then by the belt feeder 5 that gathers materials The feed end of the drying cylinder of drying system is transported to machine 6, enters drying cylinder 8 through smoke box 7.The heat source of oven-dried aggregate is by burning Device 9 provides, and can use oil burner, can also use coal-fired combusting device.Aggregate is by drying, heating, finally from drying Cylinder is drawn off into hot elevator 14.The dust-laden flue gas containing powder generated after drying system burning can be filtered by dust pelletizing system 10 After dust removal process, gas is extracted out by air-introduced machine 11, and through 12 row of chimney to air, and the useful dust being separated by filtration after processing is defeated Send to the recycling powder cabin 21 of miberal powder feed system, useless dust and handled by argillization.The aggregate that the drying drawn off by drying cylinder is heated Lifted in the vibrating screen 16 of MIXING SYSTEM CONTROLLED BY 15 and sieved by hot elevator 14.
The MIXING SYSTEM CONTROLLED BY of the utility model has the vibrating screen for being used for sieving five kinds of particle diameter aggregates, is directly sieved by vibrating screen The aggregate of five kinds of continuous gradings is separated, and the aggregate of five kinds of continuous gradings is delivered to mixing building.Set and remove on the vibrating The aspiration of negative pressure mouth of dirt system connection, reduces airborne dust, and the dust-laden flue gas containing powder of generation or gas containing powder are delivered to dedusting system Unite to carry out being separated by filtration processing.Aggregate is divided into the aggregate of five kinds of grain size specification sizes after the screening of vibrating screen 16, temporarily Be stored in hot aggregate bin 17 in, then aggregate out of hot aggregate bin according to grading requirement by building stones scale hooper 18 add up formula weigh entrance mix Close building 26.Powder supplying system has the new powder storehouse 22 for being used for holding new miberal powder and the recycling powder cabin 2 for holding recycling miberal powder (that is, recycling the useful dust that powder cabin can be used for collecting dust-removing system to be separated by filtration out), miberal powder is by blanking device and helical feed Machine 19 is transported to powder weighing bucket 23, is transported to after being weighed in mixing building 26.Into the aggregate of mixing building, miberal powder and attached Fibre object added etc. together stirs, while is pumped into the pitch for heating and weighing in advance.Mixing building is connected with negative tube, passes through negative pressure The gas containing dust at each position is sucked dust pelletizing system by pipe, to carry out being separated by filtration processing.
Wherein, pitch is stored in asphalt tank 24, is heated to appropriate temperature by heat-conducting oil heating system 29, during heating, The outlet temperature of bituminous concrete to be laid is determined according to the temperature of asphalt concrete, according to required outlet temperature Pitch and aggregate are heated.During mix, pitch is transported to metering in pitch scale hooper 25 as desired by reversing pump, so Sprayed into afterwards by spray pump in mixing building 26.The bituminous concrete formed after mix transports or flows automatically to finished product by trolley 27 In feed bin 30.Dumper charging is transported to building site, alternatively, also can will directly expect according to device layout without finished product bin by mix Direct entrucking downstairs.
Wherein, from drying cylinder come out ash-laden gas since the effect of air-introduced machine 11 is inhaled into primary dust pelletizing system 10a.Shake Pumping negative pressure gas with dust in dynamic sieve and mixing building also enters primary dust pelletizing system.The coarse powder dirt come out from primary dust pelletizing system leads to Cross hot elevator and enter mix program.The fine dust come out from primary dust pelletizing system enters secondary dust collecting system 10b, two level The useful fine particle (i.e. useful dust) that dust pelletizing system is collected into after separating and filtering is handled is inputted back by recycling powder pipeline Powder cabin 21 is received, whipping procedure is then entered according to grading requirement, and since useless fine particle (i.e. useless dust) cannot utilize, Then water is added to discharge by mud bar mixer.
Specifically, the utility model uses secondary dust collecting system as shown in Figure 7 to dust-laden flue gas containing powder and gas containing powder Carry out being separated by filtration processing.The secondary dust collecting system of the utility model includes：Rack；Rack-mounted primary dust removing device 203 (as shown in Figure 8, Figure 9), its air inlet 232 are conveyed by the gas delivery port of connecting tube 201 and drying system, hot mineral aggregate During the gas delivery port of the system that can produce the gas containing powder be connected, there is the partition plate for being used for being separated by filtration dust 202, partition plate separates useful dust and particle diameter useless dust-filtering less than 0.075mm of the particle diameter more than or equal to 0.075mm Open, quick conveyer is provided with below partition plate 202, so that the useful dust of isolating partition plate is by primary dust removing device 203 Air outlet 231 is delivered to mixing building；Rack-mounted secondary ash collector 204, it passes through partition plate with primary dust removing device 203 202 separate, for that will be output to (powder not shown in figure in dust collection hole automatically in real time by the useless dust of partition plate 202 Dirt collection pit).
Wherein, due to useful powder that the primary dust removing device 203 of the prior art is isolated partition plate 202 using screw conveyor Dirt, which compresses, is delivered to the elevator of mixing building, in course of conveying, often occur useful dust blocking screw conveyer and by its Useful dust is quickly delivered at elevator by the phenomenon that motor is burnt out, therefore, the utility model using belt conveyor, from And conveying speed is improved, also greatly reduce the failure rate of motor.During design, the input terminal of belt conveyor is arranged on partition plate 202 lower section.
Wherein, the secondary ash collector 204 of the utility model can use fiber bag precipitator (as shown in Figure 7), its dust The disposal box of case and primary dust removing device is connected as one, and is separated by partition plate, and particle diameter is greater than or equal to the useful powder of 0.075mm Dirt is kept off down by partition plate and dropping on belt conveyor, and useless dust of the particle diameter less than 0.075mm enters two-stage dust removal through partition plate Device 204, and be transported to via the screw conveyor of secondary ash collector 204 at dust mouth.In the prior art, set at dust mouth Electronic discharge valve is put, when the useless dust that screw conveyor conveying comes reaches preset weight, electronic discharge valve just starts, will Useless dust discharge, this mode so that electronic discharge valve is often blocked, and sometimes even blocks screw conveyor, causes Burn-down of electrical machinery.And it is the generation for avoiding such case, the utility model sets balance cock at dust mouth, it can use balance Valve, can also use the movable plate being hinged in the middle part of dust mouth；When screw conveyor is conveyed at useless dust to dust mouth, put down Weighing apparatus switch makes useless dust be discharged at dust mouth with regard to automatic start.
Wherein, the utility model set below dust mouth dust collection cheat, and at dust collection hole set be used for Its top or the water injector sprayed water in it, so that water that the useless dust discharged at dust mouth is sprayed by water injector is direct Wash away in dust collection hole, carry out argillization processing.
Wherein, conduction oil pumps after coal-fired or fuel oil heat-conducting oil heating system 29 is heated to proper temperature through hot oil pump Enter thermal oil circulation pipeline, asphalt tank pitch, pitch compound pipeline complex pipeline, asphalt thermal insulation plug valve, asphalt thermal insulation pump etc. are passed through into heat Conduction oil circulates and heats up and keep the temperature.And in order to efficiently use the energy in bituminous concrete preparation process, the utility model is also By the finished product bin being arranged on below the machine outlet of mixing building, store the bituminous concrete from machine outlet output, and by Surrounding's ring of finished product bin sets the conduction pipe that its entrance is connected with the outlet of heat-conducting oil heating system, so as to by heated asphalt The conduction oil pumped out after tank drained conduction pipe, and finished product bin is heated using the heat that conduction oil carries；In addition, by The heating component for setting its inlet to be connected with the outlet of conduction pipe in storage bin for storing mineral aggregate and pitch, so as to Storage bin is heated using the heat that the conduction oil flowed out from conduction pipe carries.
Specifically, since the pitch typical temperature of mix needed for mixing building is more than 150 DEG C, so needing to use conduction oil Heating system heats pitch, and the temperature for the conduction oil for being used to heat must be more than 150 DEG C, in heated asphalt Afterwards, conduction oil still carries amount of heat, and these heats are not collected and utilized in the prior art, cause amount of heat to damage Lose, cause energy consumption huge, for such case, the utility model is using equipment as shown in Figure 6 to for storing mix The finished product bin of bituminous concrete afterwards and the storage bin for storing mineral aggregate and pitch carry out isothermal holding, it will be appreciated from fig. 6 that with Include in the equipment of insulation：Ring is located at the conduction pipe 103 around finished product bin, its entrance for heating with storing pitch in it The outlet of heat-conducting oil heating system 100 of asphalt tank 101 be connected, so that the conduction oil pumped out after heated asphalt tank 101 draws Conduction pipe 103 is flowed through, the heat carried using conduction oil heats finished product bin 102；It is arranged on for storing mineral aggregate and drip In the storage bins of the raw material such as green grass or young crops and heating component 104 that its inlet is connected with the outlet of conduction pipe 103, to utilize The heat that the conduction oil flowed out from conduction pipe 103 carries heats storage bin.
Preferably, conduction pipe can use the helical pipe being spirally wound on from the bottom to top around finished product bin (in figure It is not shown), it can also use and introduce from finished product bin side, drawn after finished product bin bottom passes through from finished product bin opposite side Pipeline (as shown in Figure 6), can also use other arrangement modes can to finished product bin heat pipeline.
And in order to improve the heat entrained by the conduction oil to trickle in conduction pipe to the bituminous concrete in finished product bin Insulation effect, the utility model can also be used for the insulating layer 105 that keeps the temperature in thermal conductive pipe outer cladding, and insulating layer can use Any of phenolic resin, polyurethane, rubber-plastic sponge, polyethylene, polystyrene foam, mineral wool, rock wool material is made.It is excellent Choosing, the insulating layer of the utility model is made of rock wool, and rock wool ring is located to the periphery of conduction pipe, prevents conduction oil from carrying Heat leaks.
And for the ease of making above-mentioned conduction pipe 103 and asphalt tank 101, heat-conducting oil heating system 100, heating component 104 are respectively connected with leading to, and the utility model further includes：What is be connected with heat-conducting oil heating system 100 is used to convey the supervisor of conduction oil Main pipeline and each asphalt tank 101, is respectively connected with logical multiple subtubes 108, for will heating component 104 and heat conduction by road 107 The reflux line 106 that heating system for oil 100 is connected.During design, it can be respectively arranged to close on each pipeline or open The switching control pilot of corresponding pipeline or the flow control valve for adjusting fluid flow, in order to according to actual needs control conduction oil Flow direction and flow.In addition, to adjust the flowing velocity of conduction oil in conduction pipe, it can also set what is be connected with conduction pipe Kinetic pump (not shown).
Wherein, for the utility model according to the temperature of asphalt concrete, determine bituminous concrete to be laid goes out machine Mouth temperature, and according to the outlet temperature, determine the temperature of mineral aggregate and pitch to be heated, then pass through drying system and conduction oil Heating system respectively heats mineral aggregate and pitch, and therefore, the utility model is further included to be added with drying system, conduction oil The control system that hot systems, miberal powder feed system, MIXING SYSTEM CONTROLLED BY, dust pelletizing system connect respectively, control system is with computer and touches Screen and manual control system are touched, all control needs can be completed.Instruction, the daily output are reminded with storage control, fault detect Examine.And drying system and heat-conducting oil heating system respectively have be used for receive and process bituminous concrete to be laid needed for go out The receiver of machine mouth temperature, will pass through the heating-up temperature that the outlet temperature received converses mineral aggregate and pitch respectively, then Control drying system and heat-conducting oil heating system are heated by the temperature conversed.
In addition, the utility model device further include it is super it is existing grind weight standard be used for the bituminous concrete and mistake after laying Cross material and carry out three roller (not shown)s that isosceles triangle rolls, the stone roller of the super existing roller for grinding weight standard is great in 2 Ton.
In the following, with reference to Fig. 1, to being applied using the utility model high altitude localities asphalt concrete core dam construction equipment The process of work is described in detail.Wherein, the high altitude localities of the utility model refers to the area of more than 3000 meters of height above sea level.
Specifically, in the high altitude localities of more than 3000 meters of height above sea level, most area mountain Gao Gushen, topography and geomorphology be various, Formation lithology is complicated, coating is deep, conditions of transportation is poor.Overall high altitude localities vegetation is rare, rarefaction of air, air pressure compared with It is low, oxygen is less, temperature is low, day and night temperature is big (temperature difference is at 20 DEG C or so), often occurs daily minimal tcmperature at 0 DEG C to -20 Between DEG C, wind-force between 4-6 grades, intra day ward be more than 5mm situation, daytime, solar radiation was strong, and night is relatively cold, gas As condition is extremely complex, hydrogeological environment is severe, belongs to geological disaster and takes place frequently and earthquake-prone region.Therefore, in High aititude Progress asphalt concrete core dam construction in area's is extremely difficult, for the smooth development that ensures to construct, is existed using the equipment of the utility model High altitude localities carries out asphalt concrete core dam construction and includes the following steps.The preparation of S01, raw material
The bituminous concrete of S11, preparation using the local sand gravel of high altitude localities as aggregate.
In the prior art, core of earth-rockfill dam bituminous concrete usually requires that alkaline bone material, such as limestone and dolomite.Because of drip Green grass or young crops is in acidity, and so during bituminous concrete heat is mixed and stirred, the combination of pitch and alkaline bone material is not only surface physics combination, And faying face can chemically react, the adhesive force of pitch and aggregate can be strengthened.But in the dam site of some high altitude localities Area, due to the features such as it is geographical, weather, in rational economical transport distance range, it is impossible to basic rock material source is found, it is local Only natural sand gravel material or acid rock, such as granite and quartzite.And it is the smooth development for ensuring construction work, it need to examine Consider using situation of the local sand gravel as aggregate.
The utility model is based on above-mentioned reason, using the sand gravel that local stock ground has as raw material, by sand gravel Carry out break process and obtain the aggregate of required bituminous concrete.Wherein, the bituminous concrete of the utility model includes thick bone Material, fine aggregate, filler and pitch.
After to local sand gravel material crushing and screening, 19~16,16~13.2,13.2~9.5,9.5~4.75 and are obtained 6 grades of 4.75~2.36mm, 2.36mm~0.075mm particle diameters mineral aggregates, wherein, coarse aggregate selects particle diameter for 19~16,16~13.2, The Pyatyi proportioning of 13.2~9.5,9.5~4.75 particles, fine aggregate select the particle that particle diameter is 4.75~2.36mm, and filler uses Limestone mineral powder, pitch use the A grades of pitches in Kelamayi 70.
By to coarse aggregate into line density and the moisture content test, with the adhesion experiment of pitch, tough test, heat resistance Experiment and the experiment of crushing rate, identification show that for sand gravel material totally in alkalescence, its quality is hard, does not occur in heating process Phenomena such as cracking, decomposition, crush sand gravel material and natural grit granulation be overall strong with pitch adhesive force, robustness is good, quality base This meets SL501《Bituminous concrete facing of earth-rock dam and core-wall design specification》The technology of defined bituminous concrete coarse aggregate will Ask, therefore, local sand gravel can be as the coarse aggregate of asphaltic concrete core wall.
By to fine aggregate carry out apparent density, water absorption rate, water stablize grade, robustness,<0.075mm granule contents with And silt test, show that fine aggregate indices are satisfied by code requirement, can be as the fine aggregate of solidifying native core-wall.
And the coarse aggregate of the utility model, fine aggregate, the mass percent scope of filler are：53:30:17-55:32:13, Bitumen aggregate ratio is 6.7%-7.3%.Preferably, coarse aggregate, fine aggregate, the mass percent of filler are：54.6:31.4:14, oilstone Than for 6.8%.
Wherein, during bituminous concrete is prepared, the temperature of mixing and stirring of bituminous concrete as defined in existing related specifications is shown in Table 1 below.
The heating-up temperature (DEG C) of 1 bituminous concrete of table
Project Temperature
Asphalt heating temperature 155~165
Aggregate heating-up temperature It is higher than asphalt heating temperature by 10~20
Bituminous concrete drop temperature 155~175
And the mix temperature of the bituminous concrete of the utility model needs to be adjusted in real time according to local making situation, During mixing bituminous concrete, first by aggregate and filler dry mixing 15s, add heated bitumen and mix and stir.The mixing time of bituminous concrete 45s should be no less than.Bituminous concrete answers uniform color, does not isolate, without grey material.
The Transition Materials, transition dam shell material and dam shell material of S12, preparation using local sand gravel as raw material.
The Transition Materials, transition dam shell material and dam shell material using local sand gravel as raw material are prepared, wherein, the particle of Transition Materials Footpath is not more than 8cm, and transition dam shell material and dam shell material use identical raw material, and the largest particles particle diameter is not more than 40cm.
Wherein, by carrying out sand gravel material feeding, draining processing to high altitude localities reservoir area stock ground, obtain moisture content and exist The transition dam shell material and dam shell material that are used to be formed sand-gravel dam between 4.1%-4.4%.
Since the reservoir area stock ground of high altitude localities is concentrated mainly between river and road, the utility model is used and shelled by stages From method carry out, peel off material and use 2m3 hydraulic crawler excavators, coordinate 162kW bull-dozers to fill 25t dumpers and transport to Dumping Sites and table Mound puts field.After topsoil stripping, rezone and successively carried out to material taking, every layer of feeding using benching tunnelling method, feeding thickness is no more than 3m.For multi-region while feeding, the construction road of a wide 6m can be being arranged along river side, before construction road is built, first shelled From the topsoil of roadway area, then rolled or backfilled smooth, in order to the upper dam of later stage road lower part material exploitation, road passes through Wear to the regional of branch, carry out feeding at the same time.After constructing road, in order to reduce the underground water of sand field, then to river Road is dredged in time, and is declined 2~3m, to ensure the smooth outflow of river water level.
After material exploitation waterborne, in river and bottom of river channel also has substantial amounts of sandy gravel.For this reason, when material is exploited on the water, root According to groundwater condition, riverbank feeding area is reduced as far as possible, then excavates the groove that deep and width is 3m, in dry season by upstream river Road reconstruction is connected with riverbank feeding groove, is introduced in diversion canal.
Measured after river is reconstructed, the river newly reconstructed is lower 4m or so than former river, and the underground water leakage under original bed It is relatively slow, according to the section of division in construction, transverse drain ditch is excavated, underground water segmentation is blocked and is drained into newly-built river. In addition, partial sector sets longitudinal drainage ditch to be connected with transverse drain ditch, in order to suitable always according to geological condition and feeding situation Freely drain underground water.When feeding is less than newly-built river, then catch pit is deep-cut in feeding area, underground water is carried out in fixed-point set It is pumped in open channel, each point arrangement is no less than 2, when water is larger, sets multiple spot pump drainage.Main stem is less than bright after feeding During canal elevation, then the wide range water pump concentration that 4 75Kw are installed in main stem and open channel crossover sites is pumped in diversion tunnel.
Since underwater material water content is big, clay content is big compared with material waterborne, is influenced by soaking under water for a long time, in sand gravel material Particle containing shale and fine grained containing chiltern mix and combined with sand gravel coarse granule material, finer and close, poor permeability, drying rear surface Hard solid plate knot is produced, prevents the seepage flow of interior moisture content outward, and produces that surface is stiff hardened, big main of inner aqueous rate Reason.For this reason, in the reclaiming process of reservoir area stock ground, how to solve the problems, such as that material is the largest difficulty under water.The utility model is being applied Following measure is taken to be controlled in work：
1) it is underwater to expect that mining is opened with standing to adopt and (also exploit according to on-site actual situations) according to related engineering construction experience The working measure of digging, excavation equipment use 3m3 large excavators, coordinate dam on live loading machine and haulage vehicle Mining Transport. At the same time according to different feeding regions, it is segmented to expect to excavate to fixed area under water using generous amount hydraulic crawler excavator and concentrates drying.
2) time planning and dam material exploited according to underwater sand gravel material are filled into measurement, and sand gravel stock ground is flat by longitudinal direction Several operation areas are respectively done, lateral aspects first excavate groove ejectment, accelerate the underwater material draining in scene, and layering step facade band is opened Adopt.
3) draining experiment is carried out at the scene, is carried out draining by the requirement of draining laboratory data after obtaining test data, is made Moisture content is between 4.1%-4.4%, then again with the upper dam of 2m3 hydraulic crawler excavators dress dumper transport.
4) to ensure the exploitation quality of underwater sand gravel material, the requirement of draining is conducive to, layering benching tunnelling method facade band is opened Adopt with every layer of working thickness 2m, strip is with 20m wide control feedings.In order to obtain good circulation construction, effect is improved, loads fortune Material to complete the first band, then carries out the feeding of second strip equally since the starting point of each operation area.
5) while dam filing material source reduces moisture content, heap paving, subregion is also taken to ted and fill stone roller on dam facing The measure of pressure, i.e., be divided into IV region by dam filing, and when an area dries draining in windrow, an area paves tedding, One area is being rolled, another area is carrying out defect processing.
6) in reclaiming process, field technician and experimenter strengthen live material source quality control checking, sampling test Deng, discovery has poor material, forbids to exploit, to minable material, irregular division region feeding.It was found that feeding regional quality is not Meet the requirements, replace feeding region immediately.Ensure the quality of upper dam material.
If there is most of larger boulder group in reservoir area stock ground in feeding, need to carry out to solve it is quick-fried after could carry out continuing to take Material.For this reason, being drilled in construction using air drill, static expanding agent blasting procedure solution is quick-fried, and the small measure of quartering hammer solution is crushed to 30~40cm.Broken block building stones quality is hard, and large storage capacity, compression strength meets the requirement of design block building stones, by its complete matter Good material stockpiling, the construction for big above and below the dam drain on embankment slope body.And water chestnut uneven homogeneous poor material in part is mixed with dam material Fill on dam.
Bituminous concrete, Transition Materials, transition dam shell material and the dam shell material that S02 while making prepare, to be formed mutually Adjacent asphalt concrete layer, the transition bed of material, the transition dam shell bed of material and the dam shell bed of material.
S21, by the bituminous concrete prepared, the disposable making at the same time of Transition Materials on the pedestal of bituminous concrete, with Just asphalt concrete layer and a pair of of transition bed of material positioned at asphalt concrete layer both sides are formed on pedestal.
Wherein, the utility model core wall dam bottom partial schematic diagram as shown in Fig. 2, including：Concrete positioned at bottom Cut-pff wall 6, is arranged on the concrete floor 5 of 6 top both sides of concrete cut, is arranged on the pitch of the top of concrete floor 5 Concrete pedestal 4, spreads out and puts on the up-narrow and down-wide asphaltic concrete core wall 1 above bituminous concrete pedestal 4, wherein, in pitch The upper and lower surface of concrete pedestal 4 paves respectively chiltern bitumastic 3.
Wherein, need to be to the use of bituminous concrete pedestal 4 after structure as shown in Figure 2 has spread out and put on bituminous concrete pedestal 4 Handled in the joint face being connected with asphaltic concrete core wall 1, it is specific as follows：
1st, dust removal process is carried out to joint face, makes joint face clean, dry, no graywall.
2nd, spraying applies bottom material on joint face, it is desirable to and spraying is uniform, such as brushing asphalt paint, dosage about 0.15~ 0.20kg/m2.Asphalt paint can be heated bitumen or cut-back asphalt or cationic emulsified bitumen；Or spray cut-back asphalt, dilution Pitch can dissolve with gasoline or kerosene or diesel oil with pitch, stir evenly and form.
3rd, after dry tack free to be sprayed, the chiltern bitumastic 3 for the 2cm thickness that paves in sprayed surface.
After being disposed to the joint face of bituminous concrete pedestal 4, the amount of progress payoff operation and stationary positioned metal Silk, then carries out making using the paver with three hoppers.
The paver that the utility model uses has the mixed-hopper positioned at the middle bituminous concrete that is used to pave, mixed The both sides for closing hopper set a pair of transition hopper for being used for making Transition Materials respectively, after bituminous concrete prepares, will drip After blue or green concrete, Transition Materials load and unload in corresponding hopper respectively, paver walking, disposably by bituminous concrete and transition Making is above the pedestal of bituminous concrete at the same time for material, so as to form asphalt concrete layer above pedestal and positioned at pitch coagulation A pair of of transition bed of material of soil layer both sides, this layer of asphalt concrete layer and a pair of of transition bed of material are respectively asphalt concrete core dam The bottom.
Wherein, since the coarse aggregate of the utility model is continuously matched using Pyatyi, so the utility model is in asphalt When concrete layer and a pair of of transition bed of material, the thickness being laid with every time can be more than 37cm, less than or equal to 40cm (after rolling Thickness is more than 30cm, less than or equal to 34cm), the maximum beyond existing specification is no more than the thickness of 25cm, therefore can be very big Laying speed is improved, is also beneficial to the insulation of the lower asphalt concrete layer after being laid with.
S22, the bituminous concrete prepared, Transition Materials are disposable at the same time on pedestal of the making in bituminous concrete Meanwhile making transition dam shell material and dam shell material, so as to formed a pair of of transition dam shell bed of material for being located on the outside of a pair of of transition bed of material and A pair of of dam shell bed of material on the outside of a pair of of transition dam shell bed of material, and asphalt concrete layer, the transition bed of material, the transition dam shell bed of material Adjoin each other successively with the dam shell bed of material.
Wherein, after dam shell material of the natural moisture content between 4.1%-4.4% is obtained, first to the sand gravel material of exploitation into Row carries out corresponding field compaction test with different construction parameters, i.e., layer thickness (60cm and 80cm), number of rolling (6 times and 8 times) and (4.2%, 6.2% and 9.5%) is added water to, is naturally to be not added with regimen condition when wherein moisture content is 4.2%.Before field test, first Laboratory test is carried out, field combinations experiment is carried out according to laboratory test achievement again, is through surveying sand gravel material maximum dry density 2.36g/cm3, experimental relationship 1.95g/cm3, natural moisture content is 4.1%~4.4%, and the grain composition of earth and stone material meets Design requirement, stone select the method for attacking and occupying and roll-back method respectively, and test combinations situation is shown in Table 2.
2 field compaction test combined situation table of table
Compacted dry density, rolling layers surface settlement have been substantially carried out during experiment, has rolled rear earth material grain composition analysis Deng experiment.In trial zone arrangement settling amount measuring control point measurement compaction and subsidence value, and calculate the average heavy of same test unit Drop rate.Roll rear douche and compacted density is measured by sampling, after rolling, a test unit takes 2 interior filler conducts of testing pits Material sample is filled, measures its water content, dry density, filler grading, its dry density is measured with douche, calculates relative density. By code requirement, a diameter of 1.6m of each testing pits, depth is the filled slope after test group filling compaction where testing pits, and actual measurement is pressed Material water content control error≤1% is filled after reality；The compacted density of one test unit using the average value of 2 samples taken as End value.Dam shell material field compaction test data result statistics is shown in Table 3.
3 field compaction test data result statistical form of table
As can be seen from the above table, as the increase of layer thickness, compacted dry density have declined, total trend is that stone is got over Thin, dry density is bigger after compacting, and for this experiment, influence of the paving soil thickness to consolidation effect still meets convention.Pawnshop When layer thickness is identical, with the increase of number of rolling, compacted dry density also rises therewith.When difference paving is thick, fills out paving soil thickness and get over Greatly, settling amount is bigger；Identical to fill out paving thickness and during number of rolling, moisture content is bigger (in a certain range), and settling amount is smaller.
Front and rear earth-rock dam shell material gradation differentials situation is rolled for contrast, earth-rock dam shell material is carried out during experiment Grading analysis, from analysis result it was found from, the grading curve of dam material and stock ground original when difference fills out thickness, different number of rolling Beginning grading curve is all relatively, it is possible to determine that, during roller compaction construction, dam material does not occur substantially broken.This rule with The characteristics of STRAIN PROPERTIES OF SAND-GRAVEL MATERIALS particle is round and smooth, hard, non-breakable is consistent, and each grading curve is all in technical requirements dam shell material For grade with envelope, the quality for further having verified stock ground dam shell material meets design requirement.Grain composition analysis curve is shown in Fig. 5.
By productivity field compaction test Analysis on Results, and consider compaction and subsidence amount result, number of rolling and dry density Variation tendency, select, determine the filling construction technique of transition dam shell material and dam shell material.Meeting the same of technical standard requirement When, consider construction effect, ensure construction quality, the utility model use final construction technology for：Making transition dam shell When material and dam shell material, every layer of laying depth is 60-80cm (preferably loose laying depth 80cm) plus 0% (i.e. natural moisture content of water 4.1%~4.4%) 8 times (static pressure 2 times+pressure of shaking 6 times), are rolled and be used as site operation control parameter, rolling method for retreat mistake away from Method (muller wide/number of rolling)., will be natural aqueous by haulage vehicle after the filling construction technique that dam shell material is determined according to experiment The dam shell material of rate 4.1%~4.4 is laid at the dam site for the pedestal both sides for treating making asphaltic concrete core wall, forms a pair of of lower floor The dam shell bed of material.During laying, using attacking and occupying method stone, in stone using digging machine by moisture content it is big and the small dam shell material of moisture content into Row mix, is then bulldozed with bull-dozer again.
S03, with beyond it is existing grind weight standard roller asphalt concrete layer and the transition bed of material are rolled, with existing The roller for grinding weight standard rolls the transition dam shell bed of material and the dam shell bed of material, to form the bituminous concrete heart after rolling Wall dam basal layer.
S31, after bituminous concrete, Transition Materials, transition dam shell material and dam shell material are laid, with beyond it is existing grind weight The roller of standard is synchronized and rolled to asphalt concrete layer and the transition bed of material, it is preferred that beyond the existing stone roller for grinding weight standard The stone roller of press is great in 2 tons, and more rollers are synchronously rolled in isosceles triangle.
Wherein, isosceles triangle synchronously roll be by make to roll the roller of lower floor's asphalt concrete layer it is preceding, for rolling A pair of of roller of the lower transition bed of material of a pair is in rear, three rollers while the method realization rolled of walking forward.
It can only be used after regulation bituminous concrete paves in existing specification and grind weight for less than 1.5 tons of light-duty roller progress Roll, but the bitumen aggregate ratio of the bituminous concrete used due to the utility model is 6.8%, and continuously matched somebody with somebody using Pyatyi, therefore, After bituminous concrete paves, the roller more than more than 2 tons can be used to be rolled for the utility model, and in roller compaction process not Occur and fall into stone roller, viscous stone roller phenomenon
(to increase heat insulation effect, can also be laid with felt-cloth on bituminous concrete before rolling), is greatly improved and rolls Speed, reduces the lost speed of heat after bituminous concrete is laid with.
Preferably, the utility model can be using three 2.2 tons of roller to lower floor's asphalt concrete layer and lower Transition Materials Layer carries out isosceles triangle at the same time and rolls, can also use centre for 2.2 tons, both sides are 2.6 tons (or more than 2.6 tons) three roll Machine carries out isosceles triangle and rolls.
In roller compaction process, bituminous concrete just grinds temperature control at 130 DEG C~160 DEG C, grinds temperature eventually and is not less than 110 DEG C, if paving material is excessive, static can be rolled after a certain period of time after paving.The vibrating roller speed of travel is controlled in 20m/ Min~30m/min.With bank slope binding site and vibrating roller roll less than corner or slope position, using Minitype manual ram ram It is real.Compacting standard is untill bituminous concrete surface " returning oil ", while prevents from causing aggregate to crush because compacting method is improper.
During rolled asphalt concrete, rolling compaction machine must not brake suddenly, or be rolled across core-wall.Using the dislocation side of rolling Formula, every time dislocation half grind wide, and order from left to right or from right to left rolls successively.
The making of asphaltic concrete core wall, bituminous concrete and Transition Materials are since lowest point to upper strata successively making.With This at the same time, it is completely balanced that transition dam shell material fills also construction balanced with bituminous concrete and Transition Materials concora crush, overall core-wall Rise, make completely to keep same elevation as far as possible, reduce transverse joint to the greatest extent.When having transverse joint, it engages the gradient and generally makes 1：3 Slope, more than levels shift of butts 2m.Vibroroller cmpacting is real-time, overlapping at transverse joint to roll 30~50cm.In core-wall both sides In the range of 2m, the big machinery operation of more than 10t (10 tons) must not be used, avoids core-wall local and is distorted or destroyed by shake, if Have to use, how long can just be rolled after need to determining core-wall making, roller exciting force size etc., locally shaken to prevent core-wall Distortion destroys, and various machineries must not directly cross over core-wall.Bur on vibrating roller should be cleared up in time.
The utility model is by the way of three rollers are in isosceles triangle distribution at the same time to the asphalt concrete layer that lays Rolled with the transition bed of material, avoid asphalt concrete layer in the prior art and the transition bed of material is non-concurrent when rolling, roll The situation for making asphalt concrete layer be subjected to displacement or distort during the transition bed of material so that asphalt concrete layer and Transition Materials after rolling The junction handing-over of layer is good, and the transition bed of material can provide a supporting role for asphalt concrete layer, reduces bituminous concrete and is grinding Loss in pressure., can when the utility model rolls the asphalt concrete layer laid and a pair of of transition bed of material progress isosceles triangle First to be rolled 6-8 times using the method for stone roller of shaking, then quiet grind 2 times；It can also be ground 2 times using first quiet, then shake and grind 6-8 times, then quiet stone roller 2 Time method, the method rolled is determined with number according to the paving material of the bituminous concrete to pave every time, but no matter which uses Kind rolling method, the mean porosities of the bituminous concrete after grinding eventually are smaller than 2%.
S32, with beyond it is existing grind weight standard roller asphalt concrete layer and the transition bed of material are rolled it is same When, the transition dam shell bed of material and the dam shell bed of material are rolled with the existing roller for grinding weight standard, to form pitch after rolling Concrete core-wall dam basal layer.
The transition dam shell material of natural moisture content 4.1%~4.4 and dam shell material are being laid at dam site and are integrally being bulldozed shape In a pair after lower floor's transition dam shell layer and a pair of of lower floor's transition dam shell bed of material, rolled using 22 tons of roller, first static pressure 2 Time, then the pressure (vibroroller cmpacting) 6 times of shaking carries out experiment and defect processing is qualified after rolling, will with reach that upper strata dam shell material fills Ask.
Wherein, basal layer includes the following each layers to adjoin each other：Positioned at middle lower floor's asphalt concrete layer, positioned at lower floor A pair of of lower floor's transition bed of material of asphalt concrete layer both sides, respectively a pair of of lower floor's transition on the outside of a pair of of lower floor transition bed of material The dam shell bed of material, a pair of of the lower floor's dam shell bed of material being located at respectively on the outside of a pair of of lower floor transition dam shell bed of material.
S04, based on asphalt concrete core dam basal layer, repeat the above steps, successively asphalt concrete, mistake Material, transition dam shell material and dam shell material are crossed, is in field to form the temperature without faying face with multilayer core wall dam layer and adjacent interlayer The asphalt concrete core dam of distribution.
S41, based on asphalt concrete core dam basal layer, repeat the above steps, successively asphalt concrete, mistake During crossing material, transition dam shell material and dam shell material, the utility model is ground every time in lower floor's asphalt concrete layer to being laid with After having pressed, also using temperature controlled method, the temperature for the lower floor's asphalt concrete layer being laid with periodically is detected, and according to this Temperature instructs the paving process of the bituminous concrete to be laid to pave in the above, and step is as follows.
Step 1, after lower floor's asphalt concrete layer has been laid with, the temperature of detection lower floor asphalt concrete layer is to obtain temperature Degrees of data
After lower floor's asphalt concrete layer has been laid with, is rolled every time, periodically to the top layer of lower floor's asphalt concrete layer Temperature detection is carried out with each wall below top layer, is being spread to obtain the top layer of lower floor's asphalt concrete layer and each wall Fixed time temperature data after if.
Wherein, carrying out temperature detection to each wall below the top layer and top layer of lower floor's asphalt concrete layer includes：
Lower floor's asphalt concrete layer is divided into multiple walls along the depth direction of lower floor's asphalt concrete layer；
Multiple rows of test point is set along the radial direction of each wall, measuring point of often listing and indexing is included along the wall axial arranging Multiple test points；
After being rolled every time to lower floor's asphalt concrete layer, temperature detection is carried out respectively to multiple test points.
After carrying out temperature detection to multiple rows of test point of each wall, obtain lower floor's asphalt concrete layer top layer and Fixed time temperature data of each wall after laying below top layer.
Wherein, the spacing between each wall of the utility model can be 4-6cm, it is preferred that between each wall Spacing is 5cm, i.e. sets a wall every 5cm, and multiple test points are set on the wall.
After obtaining the top layer of lower floor's asphalt concrete layer and the fixed time temperature data of each wall, to top layer and each wall Multiple rows of test point temperature data first summed respectively, again be averaged value processing, mixed to obtain on lower floor's pitch The temperature data of top layer and each wall in diverse location and at different moments after solidifying soil layer laying.
After detecting the temperature of lower floor's asphalt concrete layer and obtaining temperature data, also to lower floor's asphalt concrete layer During being rolled, ground temperature, wind-force and precipitation are worked as in detection in real time, to obtain real-time weather data, and will obtain The temperature data of real-time weather data and lower floor's asphalt concrete layer carry out process of aggregation, be used to instruct High aititude to obtain The construction data-base of regional asphaltic concrete core wall construction.
Step 2, after the temperature data of lower floor asphalt concrete layer is obtained, according to temperature data, if as shown by data lower floor The skin temperature of asphalt concrete layer is less than 70 DEG C, it is determined that the pitch to be laid that will be laid with lower floor's asphalt concrete layer The outlet temperature and paving material of concrete.
After the temperature data of lower floor's asphalt concrete layer is obtained, if the top layer temperature of as shown by data lower floor asphalt concrete layer Degree is greater than or equal to 70 DEG C, then directly spreads bituminous concrete to be laid according to temperature when being laid with lower floor's asphalt concrete layer It is located on lower floor's asphalt concrete layer.
It should be noted that since the height above sea level of high altitude localities, temperature are low, in the next layer of pitch coagulation that pave After soil layer, the temperature drop of asphalt concrete layer quickly, after usual decking and rolling is complete, the table of the lower floor's asphalt concrete layer to have paved Layer temperature can all be less than 70 DEG C quickly, in the case, if being provided according to specification, it is necessary to which lower floor's asphalt concrete layer is dried It is roasting to heat, but since the limitation of the conditions such as geography, weather, so meeting can not be completed to construct, therefore, present inventor The following method of the utility model is proposed in the work that studies for a long period of time, i.e., is less than 70 in the skin temperature of lower floor's asphalt concrete layer DEG C when, continue the bituminous concrete that paves using following methods：
First, according to after the temperature data of the top layer of lower floor's asphalt concrete layer of acquisition and each wall, lower floor is obtained The top layer of asphalt concrete layer, the temperature drop change of wall；
Then, changed according to temperature drop, determine the bituminous concrete to be laid that will be laid with lower floor's asphalt concrete layer Outlet temperature and paving material.
Wherein, the intermediate layer of the utility model is the wall between the 8-12cm of span top layer, it is preferred that works as adjacent spaces When the spacing of layer is 5cm, intermediate layer is used away from the wall at the 10cm of top layer.
Preferably, changed according to temperature drop, determine the pitch coagulation to be laid that will be laid with lower floor's asphalt concrete layer The outlet temperature and paving material of soil include the following steps：
If the skin temperature of lower floor's asphalt concrete layer is between 40 DEG C -70 DEG C, the temperature drop in top layer and intermediate layer is less than or Equal to 30 DEG C, i.e. when skin temperature is greater than or equal to 40 DEG C, and intermediate layer temperature is greater than or equal to 70 DEG C (away from top layer 10cm When temperature drop between the wall at place and top layer is less than or equal to 30 DEG C), it is determined that go out on lower floor's asphalt concrete layer The outlet temperature for the bituminous concrete to be laid being laid with is 150 DEG C -170 DEG C, and paving material is 140 DEG C -150 DEG C；
If the skin temperature of lower floor's asphalt concrete layer be less than 40 DEG C, the temperature drop in top layer and intermediate layer be less than or equal to 30 DEG C, i.e. when skin temperature is less than 40 DEG C, intermediate layer temperature is less than 70 DEG C, but top layer and intermediate layer are (i.e. away between at the 10cm of top layer Interlayer) temperature drop be less than or equal to 30 DEG C when, it is determined that go out the pitch to be laid that will be laid with lower floor's asphalt concrete layer The outlet temperature of concrete is 160 DEG C -185 DEG C, and paving material is 150 DEG C -165 DEG C；
If the skin temperature of lower floor's asphalt concrete layer be less than 40 DEG C, and its top layer with away from the interval at the 5cm-6cm of top layer Temperature drop between layer (preferable, the utility model is using away from first wall at the 5cm of top layer) is more than 30 DEG C, then to lower floor Asphalt concrete layer carries out pre-add heat treatment, and to improve the surface temperature of lower floor's asphalt concrete layer, then in lower floor, pitch mixes Asphalt concrete above solidifying soil layer.
Further, according to temperature drop change determine bituminous concrete to be laid outlet temperature and paving material it Afterwards, it can also be changed according to temperature drop, accordingly determine the stone roller of asphalt concrete layer being laid with lower floor's asphalt concrete layer Before pressure temperature (i.e. just grind temperature, not less than 130 DEG C), so as to asphalt concrete layer temperature be more than roll before temperature when, it is right It is rolled.
Step 3, when using above-mentioned steps determine the outlet temperature of bituminous concrete to be laid after, to be laid The mix temperature of bituminous concrete is adjusted, so that the temperature of the bituminous concrete exported at the machine outlet of mixing building reaches Outlet temperature.
Specifically, the utility model is determined to treat by periodically detecting the temperature of the lower floor's asphalt concrete layer being laid with Outlet temperature needed for asphalt concrete, then, according to required outlet temperature, determines to be used to prepare bituminous concrete Mineral aggregate and pitch heating-up temperature, so that the temperature and conduction oil that control drying system to heat mineral aggregate add The temperature that hot systems heat the pitch being stored in asphalt tank, mineral aggregate is heated in drying system, After heat-conducting oil heating system heats the pitch being stored in asphalt tank, the mineral aggregate and asphalt delivery of temperature will be met To mixing building and through mixing building mix, the temperature that makes from the bituminous concrete of the machine outlet output of mixing building reaches required and goes out machine Mouth temperature.
Wherein, mineral aggregate refers to the mixture of coarse aggregate, fine aggregate and filler.
Wherein, for the utility model according to the temperature of asphalt concrete, determine bituminous concrete to be laid goes out machine Mouthful temperature, and determine according to the outlet temperature temperature of mineral aggregate and pitch to be heated, then pass through drying system and conduction oil Heating system respectively heats mineral aggregate and pitch, therefore, the drying system of the utility model and heat-conducting oil heating system System has the receiver for the required outlet temperature for being used to receive and process bituminous concrete to be laid respectively, is received with will pass through To outlet temperature converse the heating-up temperature of mineral aggregate and pitch respectively, then control drying system and heat-conducting oil heating system to press The temperature conversed is heated.
, will be from after step 4, the temperature of the bituminous concrete exported at the machine outlet from mixing building reach outlet temperature The bituminous concrete to be laid exported in mixing building is transported at lower floor's asphalt concrete layer, and by bituminous concrete to be laid with The paving material determined in above-mentioned steps is laid immediately on above lower floor's asphalt concrete layer, will pass through the drip being currently laid with Blue or green concrete covers and heats lower floor's asphalt concrete layer, the top layer of lower floor's asphalt concrete layer melts away, so as to be formed with Upper asphalt concrete layer of the junction without layering face of layer asphalt concrete layer docking is (during asphalt concrete, while once Property be laid with Transition Materials).
The asphaltic concrete core wall being made of multilayer asphalt concrete layer, and its are ultimately formed using the utility model method Change from the bottom to top in field-effect without the layering face of combination, its temperature per between adjacent two layers asphalt concrete layer, temperature field-effect Change can combine explanation shown in Fig. 3.
Shown in Fig. 3, for asphalt concrete core dam n-th layer bituminous concrete and Transition Materials, pave on n-th layer N+1 layers of bituminous concrete and the Longitudinal cross section schematic of Transition Materials, wherein, A1-AM is respectively N+1 layers of bituminous concrete The top layer of layer and each point on the axis of each wall, B1-BM, C1-CM be respectively N+1 layer asphalt concrete layer and The each point of the junction of the transition bed of material of its both sides, AN, BN, CN are respectively the point on the axis of the asphalt concrete layer of n-th layer With the point joined on the transition bed of material of asphalt concrete layer both sides with it.
When carrying out the construction of bituminous concrete using the method for the utility model, it can be seen that adjacent two layers pitch after construction The temperature and non-uniform change of the part core-wall formed after concrete speading, but show field-effect：In N+1 layers of pitch The temperature drop highest of A2 points on the axis in the intermediate layer of concrete, centered on A2 points, the temperature drop of vertical direction is higher than along level The temperature drop (more than N+1 layers of top layer being air, n-th layer is colder basal plane) in direction (i.e. width), but it is limited per layer thickness, Thickness is about 30-34cm, and width is up to more than 0.6-2m.It is possible thereby to know, during the bituminous concrete that paves, spread out The top layer temperature drop of the bituminous concrete of paving will be faster than deep layer temperature drop, it is possible to using the method for the utility model, when having paved Lower bituminous concrete skin temperature it is relatively low when, can the lower floor's asphalt concrete layer to have paved immediately above paving material compared with High bituminous concrete, i.e., by the high bituminous concrete of temperature directly by the top layer of lower floor's asphalt concrete layer melt away and and its Docking, without layering at the faying face of layers of asphalt concrete layer for making successively to pave, and the asphaltic concrete core wall formed Parameters can reach code requirement.
Wherein, using the method for the utility model, the thickness of the bituminous concrete to pave every time can be more than 37cm, be less than or Equal to 40cm (thickness after rolling is more than 30cm, less than or equal to 34cm), paving thickness exceeds specification, with reference to quickly rolling, So that the temperature drop of the bituminous concrete to have paved slows down, better heat preservation, spreading speed is greatly improved, in the drip to having paved , it can be achieved that disposably paving in the case of blue or green surface temperature of concrete is grasped reasonably, i.e., without the bituminous concrete to having paved Surface carries out pre-add hot drying and processing, you can face paves last layer bituminous concrete directly over.
S42, based on asphalt concrete core dam basal layer, successively asphalt concrete, Transition Materials, transition dam shell During material and dam shell material, the utility model is using a pair of of the transition dam shell bed of material and a pair of of lower floor dam shell bed of material being compacted as base Plinth, is successively laid with transition dam shell material and dam shell material and layer-by-layer rolling from the bottom to top, until forming the sand that dam body temperature is in field distribution Gravel dam.It is identical with the process of dam shell material due to being laid with transition dam shell material, only carried out herein exemplified by being successively laid with the dam shell bed of material Description.
Nocturnal temperature in high altitude localities is less than 0 DEG C, and day temperature is also very low sometimes, and the sunshine-duration is short, and due to dam Contain certain moisture in shell material, after being laid with one layer or several layers of, can just may be further continued within second day being laid with, cause to be laid with Lower floor's dam shell bed of material freeze, alternatively, since temperature is low, the same day be laid with after will freeze, in this case, be Ensure that construction can be smoothed out, the utility model is successively laid with the following method.
After the completion of lower floor's dam shell bed of material rolls, daytime per day solar radiation quantity 4.53 × 1011-6.43× 1011Under conditions of megajoule, the method that rolls by roller to the frozen surface of lower floor's dam shell bed of material and (can shake and grind 2 times), The dam shell material for making the skin depth away from the lower floor's dam shell bed of material being laid be 18-20cm is loose；Then, it is upper strata dam shell material is quick It is laid on the dam shell material surface being loosened of lower floor's dam shell bed of material, to utilize the heat in lower floor's dam shell bed of material of preceding laying Can conduction of heat, and under the comprehensive function of solar energy and the bituminous concrete that has been laid with to the heat of external diffusion, make The layer dam shell bed of material is combined closely knit with the lower floor dam shell bed of material.
Successively it is laid with using the above method, the heat transfer of the thermal energy stored all the time in lower floor's dam shell bed of material in preceding laying Under effect, make lower floor's dam shell bed of material and the upper strata dam shell bed of material that is covered on lower floor's dam shell bed of material between combine closely knit method, Ensuring that dam shell material is laid with can continue to carry out at low temperatures, solve the dam shell material shallow freezing being laid with the prior art It can only just stop constructing, influence the problem of construction period.And the dam body internal temperature of the sand-gravel dam of making formation is in field distribution, That is, the temperature inside dam body, from the bottom to top temperature gradually reduce.
Specifically, during being filled using dam shell material, due to storing certain heat in the dam shell bed of material of making in advance Can, thermal energy can conduct to the upper strata dam shell bed of material, with the successively laying of the dam shell bed of material, can conduct thermal energy from bottom to top, make Filling the multilayer dam shell bed of material to be formed has certain thermal capacity, and the ice for making to freeze can melt under the action of thermal energy, so that Under the comprehensive function of the effect of heat transfer and solar energy and the bituminous concrete that has been laid with to the heat of external diffusion, make multilayer dam The shell bed of material combine it is closely knit so that last making into the temperature of dam body be in now high low field distribution trend, it is and whole The middle trend high, both sides are low centered on bituminous concrete is presented in asphalt concrete core dam.
Further, since the dam shell material of the utility model has certain moisture content, therefore, dam shell material is being laid on lower floor dam When on the shell bed of material, without the step of must sprinkling water on the lower floor's dam shell bed of material being laid with of the prior art, therefore Process is saved, saves construction cost.
S43, based on asphalt concrete core dam basal layer, successively asphalt concrete, Transition Materials, transition dam shell During material and dam shell material, successively laying to Transition Materials use disposably be laid with the same time with bituminous concrete, isosceles triangle is ground The method of pressure is realized.
Since the wind-force of high altitude localities is usually more than 4 grades, if asphaltic concrete core wall construction cannot be carried out by specification, In order to avoid such case occurs, in the construction process, wind can be reduced to the utility model by also using to be formed by the dam shell bed of material The method in the trench area of speed ensures the laying progress of the material such as bituminous concrete and Transition Materials.
Specifically, when if wind-force is more than 4 grades, is formed by the dam shell bed of material and be used to reduce the trench area of wind speed, so as to Making bituminous concrete and Transition Materials in trench area of the wind-force less than 4 grades.Preferably, with forming the trench for reducing wind speed Band includes the following steps：
A1, treating that first method overlays dam shell material as described above compared with distal side for the pedestal both sides of making asphaltic concrete core wall, To form a pair of of the lower floor's dam shell bed of material for protruding from base-plates surface, make to surround between a pair of of lower floor's dam shell bed of material and base-plates surface For reducing the trench area of wind speed.
Wherein, when overlaying dam shell material and forming a pair of of lower floor's dam shell bed of material, the side wall and vertical direction of lower floor's dam shell bed of material There should be the inclination angle more than 0 °, it is preferred that the inclination angle between the side wall and vertical direction of lower floor's dam shell bed of material is at 30 ° -45 ° Between, and incline direction is when overlaying lower floor's dam shell bed of material, to make lower floor's dam shell bed of material away from the direction of pedestal from the bottom to top The height of opposite base upper surface is 8m-10m or so, so as to make to surround one between a pair of of lower floor's dam shell bed of material and base-plates surface A trench area, the intrazonal wind speed of the trench are less than the wind speed outside the paddy above lower floor's dam shell bed of material.
A2, formed can reduce the trench area of wind speed after, based on a pair of of lower floor's dam shell bed of material and pedestal, one To the top of lower floor's dam shell bed of material and pedestal successively synchronous making respective material, so as under the blocking of both sides dam shell material, trench The all material being laid with area carries out in the less environment of wind speed all the time, until forming adjacent pitch of the interlayer without faying face Concrete core-wall.
Wherein, synchronous making respective material includes：Continue to be laid with dam shell material on a pair of of lower floor's dam shell bed of material, to form sand While gravel dam, once property making bituminous concrete and Transition Materials on pedestal, to form bituminous concrete on pedestal Layer and a pair of of transition bed of material positioned at asphalt concrete layer both sides, at the same time, in the transition bed of material and corresponding lower floor's dam shell material Transition dam shell material is synchronously laid between the side wall of layer, to form the transition dam shell bed of material.
The step of repeating above-mentioned synchronous making respective material, successively upward asphalt concrete, Transition Materials, transition dam shell Material and dam shell material after, ultimately form centre as shown in Figure 4 be bituminous concrete, bituminous concrete both sides be Transition Materials, transition The asphalt concrete core dam that material outside is transition dam shell material, transition dam shell material outside is dam shell material, and the bituminous concrete heart Each adjacent interlayer of wall dam from the bottom to top is without the layering face of combination, with reference to closely knit.
In addition, the utility model is when heating mineral aggregate, it is raw after being burnt by dust pelletizing system to drying system Into dust-laden flue gas containing powder and hot mineral aggregate course of conveying in the gas containing powder that produces carry out being separated by filtration processing, to isolate grain Useful dust and particle diameter of the footpath more than or equal to 0.075mm are less than the useless dust of 0.075mm；And isolate useful dust and After useless dust, useful dust is delivered to by mixing building by quick conveyer, so that useful dust is by secondary mix, and it is useless Dust is output in dust collection hole automatically in real time, so as to the processing of useless dust progress mud.
Wherein, in order to efficiently use the energy in bituminous concrete preparation process, the utility model is also mixed by being arranged on The finished product bin below the machine outlet in building is closed, stores the bituminous concrete from machine outlet output, and pass through the week in finished product bin Collarette sets the conduction pipe that its entrance is connected with the outlet of heat-conducting oil heating system, to be led what is pumped out after heated asphalt tank Deep fat drained conduction pipe, and finished product bin is heated using the heat that conduction oil carries；In addition, by for storing mineral aggregate With the heating component for setting its inlet to be connected with the outlet of conduction pipe in the storage bin of pitch, so as to using from diversion pipe The heat that the conduction oil of road outflow carries heats storage bin.
In conclusion compared with prior art, the high altitude localities asphalt concrete core dam construction of the utility model Equipment has the beneficial effect that following aspect：
1st, the equipment of the utility model, dust pelletizing system can carry out the dust-laden flue gas containing powder generated after burning and gas containing powder Processing is separated by filtration, the useful dust isolated quickly directly is delivered to miberal powder feed system is reused, and incite somebody to action Bituminous concrete prepares the useless dust output in real time after front and rear flue gas separation and is cheated to dust collection, avoid in the prior art because The occurrence of useless dust blocks electronic discharge valve and screw conveyor and burns out motor, that improves relevant device uses the longevity Life, improves preparation efficiency；
2nd, the equipment of the utility model, drying system and heat-conducting oil heating system have receiver respectively, so that each During mix bituminous concrete to be laid, heating temperature of the related system to mineral aggregate and pitch is controlled according to required outlet temperature Degree, avoids causing the feelings such as paving material deficiency or overheat all the time with same outlet temperature mix mineral aggregate and pitch in the prior art The generation of condition, is greatly improved the efficiency of heating surface, reduces energy loss, saves the energy.
3rd, the equipment of the utility model, there is ring to set the thermal conductive pipe around finished product bin and the peace being connected with thermal conductive pipe The heating component in the storage bin for storing mineral aggregate and pitch is put, so as to be taken using the conduction oil to pitch heating The heat of band heats finished product bin and storage bin, makes full use of the waste heat of conduction oil, it is ensured that raw material is preserved in storage bin Temperature, and solve extremely frigid zones because temperature is low and caused by ask from the bituminous concrete heat of mixing building output is lost quickly Topic, makes full use of the energy, saves the energy.
Although above-mentioned elaborate the utility model, the utility model not limited to this, the skill of the art Art personnel can be modified with principle according to the present utility model, and therefore, all principles according to the utility model carry out various Modification all should be understood to fall into the scope of protection of the utility model.

Claims (10)

  1. A kind of 1. equipment of high altitude localities asphalt concrete core dam construction, it is characterised in that including：
    For transporting the cold feed proportioning system using the local sand gravel of high altitude localities as the aggregate of raw material；
    What is be connected with cold feed proportioning system is used to receive and dry the drying system of the aggregate of its transport, according to asphalt coagulation The temperature of soil heats aggregate；
    The heat-conducting oil heating system heated according to the temperature of asphalt concrete to pitch；
    For supplying the miberal powder feed system of miberal powder；
    It is connected respectively and by the bone after miberal powder and heating with drying system, miberal powder feed system and for containing the asphalt tank of pitch Material, pitch carry out the MIXING SYSTEM CONTROLLED BY of mix processing, so that output meets machine outlet at the machine outlet of the mixing building of MIXING SYSTEM CONTROLLED BY The bituminous concrete of temperature；
    The dust-laden cigarette containing powder being used for being generated after burning being connected respectively with drying system, MIXING SYSTEM CONTROLLED BY and hot mineral aggregate delivery system Gas and gas containing powder be separated by filtration the dust pelletizing system of processing；
    Wherein, the dust pelletizing system includes：It is less than for isolating useful dust and particle diameter of the particle diameter more than or equal to 0.075mm The partition plate of the useless dust of 0.075mm；For useful dust to be delivered to the quick conveyer of mixing building；For by useless dust The balance cock being output to automatically in real time in dust collection hole.
  2. 2. equipment according to claim 1, it is characterised in that the dust pelletizing system further includes：
    Rack；
    Rack-mounted primary dust removing device, the gas delivery port and heat that its air inlet passes through connecting tube and the drying system The gas delivery port that the system of the gas containing powder can be produced in mineral aggregate transport system is connected；
    The secondary ash collector separated in rack and inside it with primary dust removing device by the partition plate；
    Wherein, the quick conveyer is placed in the primary dust removing device, and the balance cock is placed in the two-stage dust removal In device.
  3. 3. equipment according to claim 2, it is characterised in that the partition plate tiltably-mounted is in the primary dust removing device and institute Between stating secondary ash collector, and the input terminal of the quick conveyer is placed in below the partition plate.
  4. 4. equipment according to claim 3, it is characterised in that the balance cock is placed in going out for the secondary ash collector At dirt mouth.
  5. 5. equipment according to claim 1, it is characterised in that further include it is super it is existing grind weight standard be used for laying after Bituminous concrete and Transition Materials carry out three stone roller heavy-duty machines that isosceles triangle rolls.
  6. 6. equipment according to claim 1, it is characterised in that the MIXING SYSTEM CONTROLLED BY, which has, to be used to sieve five kinds of particle diameter aggregates Vibrating screen, the aspiration of negative pressure mouth that is connected with the dust pelletizing system is set thereon.
  7. 7. according to claim 1-6 any one of them equipment, it is characterised in that further include：
    The finished product bin being arranged on below the machine outlet of mixing building, to store the bituminous concrete from machine outlet output；
    Ring is located at the conduction pipe that around finished product bin and its entrance is connected with the outlet of the heat-conducting oil heating system, with Just the conduction oil pumped out after heated asphalt tank was drained into conduction pipe, the heat carried using conduction oil adds finished product bin Temperature；
    Be arranged on for store mineral aggregate and pitch storage bin in and the heating that is connected with the outlet of conduction pipe of its inlet Component, so that the heat carried using the conduction oil from conduction pipe outflow heats storage bin.
  8. 8. equipment according to claim 7, it is characterised in that the thermal conductive pipe outer cladding is used for the insulating layer kept the temperature.
  9. 9. equipment according to claim 8, it is characterised in that the insulating layer is by phenolic resin, polyurethane, rubber and plastic sea Any of silk floss, polyethylene, polystyrene foam, mineral wool, rock wool are made.
  10. 10. equipment according to claim 1, it is characterised in that further include and the drying system, heat-conducting oil heating system The control system that system, miberal powder feed system, MIXING SYSTEM CONTROLLED BY, dust pelletizing system connect respectively.
CN201720876806.6U 2017-07-18 2017-07-18 The equipment of high altitude localities asphalt concrete core dam construction Active CN207244626U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112608759A (en) * 2020-12-06 2021-04-06 河南九一环保科技股份有限公司 Method for heating stone by using solar energy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112608759A (en) * 2020-12-06 2021-04-06 河南九一环保科技股份有限公司 Method for heating stone by using solar energy

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