CN105000845A - Light foamed soil for abutment back backfilling and construction method - Google Patents
Light foamed soil for abutment back backfilling and construction method Download PDFInfo
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- CN105000845A CN105000845A CN201510365569.2A CN201510365569A CN105000845A CN 105000845 A CN105000845 A CN 105000845A CN 201510365569 A CN201510365569 A CN 201510365569A CN 105000845 A CN105000845 A CN 105000845A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a light foamed soil for abutment back backfilling. The light foamed soil comprises cement, a mixed material, water, a conditioning agent, a foaming agent, a micro-foam agent, and a waterproof agent. The invention also provides a preparation method of light foamed soil for abutment back backfilling. The micro-foam agent is prepared into foams by a plunger pump and an air compressor, the materials are mixed and stirred by a stirrer, and the slurry extraction speed is controlled by a frequency converter so as to control the volume weight of the finished product. The invention also provides an on-site construction method of light foamed soil applied to abutment back backfilling. The light foamed soil provided by the invention belongs to light materials, has small foundation load after filling, greatly reduces the foundation treatment intensity, and saves the foundation treatment duration. After pouring and before initial setting, light foamed soil has very good fluidity and fill self-compaction, avoids the defect of non-full filling of conventional fillers, has strong constructability, and can effectively solve the phenomenon of bumping at bridge head.
Description
Technical field
The present invention relates to road and bridge technical field, be specifically related to a kind of lightweight foam soil and the constructional method that are applied to Abutment Back backfill.
Background technology
Bumping at bridge-head be due to the relative settlement at highway end of the bridge and expansion joint (bridge approach) place or expansion joint destroy and make road surface longitudinal gradient occur step cause vehicle by time produce the phenomenon of jumping, (sedimentation value is generally 10 ~ 30cm to the sedimentation fracture that to be road surface at back filling behind abutment place occur in various degree of its principle, have even more than 60cm), make vehicle by time produce jump and impact, thus additional shock load is caused to bridges and culverts and road surface, driver and passenger is made to feel discomfort of jolting, vehicle is even caused significantly to slow down, serious caused traffic accident (particularly vehicle mechanical accident).Therefore, problem of bumping at bridge-head has become the construction quality of high-grade highway and the important factor in order of cost.Problem of bumping at bridge-head is one of difficult problem of puzzlement municipal administration engineering technical personnel always.Solving the problem of bumping at bridge-head, is the vital task of Municipal Infrastructure Management department.
The major cause of bumping at bridge-head is caused to have the resistance to shock etc. of the sudden change of non-uniform settling, rigidity and the speed of a motor vehicle and vehicle itself.With regard to urban road road conditions, the uneven sedimentation in the junction mainly between flexible pavement and rigid structure, produces caused by faulting of slab ends.The composition material, rigidity, intensity, swell-shrink characteristic etc. on bridge and roadbed, road surface there are differences, and easily form concentrated stress when end of the bridge junction is stressed.Under vehicular load, dead load, effect of natural environment, there is sedimentation in bridge and road simultaneously, but both sinkabilitys have very big-difference, and the sinkability of road, much larger than the sinkability of bridge, forms faulting of slab ends, causes, during driving, bumping at bridge-head occurs.Studying carefully its most fundamental cause is Abutment Back backfill problem, this is one of technical barrier of current building field, can only utilize rigorous working attitude, each problem when backfilling Abutment Back conscientiously processes and the huge maintenance cost in later stage just can alleviate the problem of bumping at bridge-head.
In recent years, China's capital construction speed very quickly, 100,000 kilometers, average annual newly-built road, bridge.Road, bridge construction scale of investment are large, average annual newly-built road, bridge investment 2 ~ 3 trillion yuan.The position such as wherein need the place of embankment to have the Abutment Back of road and bridge joint portion for bridge construction, to be flexible coupling under attachment strap between main bridge and access bridge, prior art routine adopts the soil of low compression ratio (as gravelly soil or rock ballast soil) to fill.When conventional construction technique is for construction, often fills 20 ~ 50cm soil and need carry out rolling, tamping; After degree of compactness reaches design requirements, then carry out lower one deck and fill, roll, tamp; Fill after reaching designed elevation, need through the settlement after construction phase of half a year or more than 1 year; Carry out road surface structare layer laying again.Whole workflow must be meticulous, and selecting materials must be suitable, and duration cost is longer, and later maintenance is more, but still can't resolve the problem of bumping at bridge-head, can only alleviate and can not effect a radical cure.
Can say that the maintenance cost of 70% of bridge inspection and maintenance spends in the repairing of bumping at bridge-head, but at present traditional technique is still adopted for Abutment Back backfill, be only improve the bearing capacity of ground, be not only difficult to tackle the problem at its root also there is duration long, the problem such as economy is not strong.For the series of problems that Abutment Back position filling material occurs, need the method finding solution from brand-new angle.
Summary of the invention
Problem to be solved by this invention is to provide a kind of lightweight foam soil and the constructional method that are applied to Abutment Back backfill, little to foundation load after filling, significantly reduces basement process intensity, saves the basement process duration.
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 150-400 part, mixing material: 20-120 part, water: 50-200 part, conditioning agent: 15-50 part, whipping agent: 5-15 part, micro foam agent: 2-10 part, water-resisting agent: 5-10 part.
Further, described mixing material comprises one or more in granulated blast-furnace slag, coal gangue, carbide slag.
Further, described conditioning agent comprises one or more in water reducer, rubber powder, toughener, suds-stabilizing agent.
Further, whipping agent is one or more in hydrogen peroxide, aluminium powder, magnesium oxide and magnesium chloride.
Further, described cement adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Further, described water-resisting agent comprises one or more in inorganic aluminate water-proof agent, calcium stearate, Zinic stearas.
The above-mentioned preparation method being applied to the lightweight foam soil of Abutment Back backfill, comprises the steps:
1) automatization foam cement device Host is utilized to control, by the pump-out of Frequency Converter Control water pump, the stirring velocity of stirrer and the transfer rate of transfer roller, in stirrer, the water of described proportioning is added by pipeline, simultaneously, in stirrer, cement is added by described proportioning, mixing material, suds-stabilizing agent, water reducer, rubber powder, toughener and water-resisting agent, stirred by stirrer, utilize Frequency Converter Control stirring velocity, guarantee that anhydrous walk can carry out pouring construction, wherein, water pump, the incoming frequency of stirrer and transfer roller all controls within the scope of 50 ~ 70HZ,
2) utilize automatization foam cement device Host to control, by ram pump and air compressor machine, micro foam agent is made foam;
3) utilize automatization foam cement device Host to control, start and take out slurry program, Frequency Converter Control takes out the speed of slurry, to control the unit weight of final finished;
4) under automatization foam cement device Host controls, the slurry respectively prepared by step 1) by described proportioning and step 2) foam prepared is transported to Homogeneous phase mixing in mixing tank and obtains mixed slurry;
5) row establishes pipeline or utilizes pump truck to carry out carrying, pouring into a mould.
The above-mentioned component on site construction method being applied to the lightweight foam soil of Abutment Back backfill, comprises the steps:
1) working-yard leveling process, and lay 10 ~ 20 centimeters of thick road surfaces with rubble, be convenient to placing installation and march into the arena;
2) according to design paper and job specifications requirement, release back filling behind abutment scope and elevation range, use lime to spill platform back of the body boundary of works area;
3) excavate according to backfill scope, the cooperation of excavation usage mining machine is manually carried out, and within the scope of works 50cm, use is manually excavated, and has excavated temporary drain, is caused by surface water outside boundary of works area;
4) for excavated Abutment Back backfill edges of regions outboard template is set, and Abutment Back backfill region by between partiting template according to 10 ~ 15 meters of intervals, construction joint is set;
5) by placing installation, lightweight foam soil is delivered to backfill region to build.
Further, adopt placement layer by layer when building, have until lower floor's lightweight foam soil and carry out upper strata after initial strength and build, the timed interval is 12 ~ 24 hours, and every layer height is at 0.8 ~ 1.5 meter.
Further, during placement layer by layer when distance 50-80 centimetres, bottom and 50-80 centimetres, top, lay layer of steel wire mesh sheet respectively.
Light soils of the present invention utilizes PC42.5 cement cementing material, makes lightweight foam soil improve intensity under same isodensity, and then meets bearing capacity, equally, is meeting under equality strength, greatly can reduce the density of product.Add water reducer, hydrophobic group oriented adsorption in water reducer molecule is in cement particle surface, hydrophilic radical points to the aqueous solution, unit molecule or multimolecular adsorption film is formed at cement particle surface, under electric repulsion effect, the flucculation structure formed due to many factors such as cohere power between cement granules after making original cement plus water is opened, and the free-water be bound in flucculation structure is discharged, the dissemination that Here it is is produced by water reducer molecular adsorption.After cement plus water, cement granules is readily wetted by water, better moistening, and when having same serviceability, the required water yield of mixing and stirring is also just few, and hydrated cementitious speed is also accelerated.The placement layer by layer of the present invention in casting process, shortening concrete is needed to occur the time of initial strength in order to reduce the engineering time, namely the lightweight foam soil of every layer is needed comparatively fast can to have certain intensity to support building of lower one deck, so in order to accelerate construct progress also can add the one of concrete early strength agent as conditioning agent, accelerate hydrated cementitious speed, promote the development of early age strength of concrete; Both had early powerful, have again certain water reducing and strength increasing function, hardening accelerator can select chloride salt hardening accelerator, and effect is best, and except raising early age strength of concrete, also have short solidifying, antifreezing effect, valency is low and easy to use.
Conditioning agent also comprises rubber powder, and rubber powder diameter remains on more than 80 orders, is added in concrete and can improves performances such as tearing, tired, also have good water-repellancy, and there is very large raising in the work-ing life after filling for lightweight foam soil.Concrete intensifier is latest generation perviousness rigidizer material, can significantly improve the wear resistance of concrete surface, weather resistance, ultimate compression strength, generally can improve more than 40%; The hard insolubles that concrete intensifier reaction generates can fill the pore in blocking concrete, produces closely knit nonporous surface layer, can improve concrete impermeability and reach more than 30%; The direct maturing top layer of concrete intensifier, the hardened layer (not being additional coatings) of formation more than other stiffening agent, coating formed hardened layer " coat " more one, permanent, forever extend ground work-ing life.Suds-stabilizing agent can control the structural stability of air bubble liquid-membrane, makes surfactant molecule in the Methodistic distribution of the liquid film of bubble, gives elasticity and the self-reparing capability of have good lather, is beneficial to the stability of lightweight foam soil.
Mixing material has blast-furnace slag, a kind of waste residue of discharging from blast furnace when being manUfaCtUre of pig iron.When the blast-furnace smelting pig iron, from the raw material that blast furnace adds, except iron ore and fuel (coke), also fusing assistant will be added.When furnace temperature reaches 1,400 one 1600 DEG C, fusing assistant and iron ore generation pyroreaction generate the pig iron and slag.Blast-furnace slag is made up of gangue, ash content, fusing assistant and other impurity that can not enter in the pig iron, is a kind of meltable mixture.Chemically become to assign to see, blast-furnace slag belongs to phyllosilicate material.Prepare lightweight foam soil after blast-furnace slag is processed into rubble, the performance of cement can be improved, adjustment strength grade, reduce the generation broadened application scope that hydration heat reduces alkali-aggregate reaction.Nonactive mixing material has coal gangue and carbide slag, and coal gangue is the solid waste discharged in coal mining process and coal washing process, is a kind of black gray expandable rock lower, harder than coal with a kind of carbon content of coal seam association in coalification course.Comprise choose from the spoil of extraction top board, base plate and interlayer and coal washing process in the digging gangue in tunnelling process, mining process wash spoil.Its main component is Al
2o
3, SiO
2, also contain the Fe that quantity does not wait in addition
2o
3, CaO, MgO, Na
2o, K
2o, P
2o
5, SO
3with micro-rare elements.Carbide slag, it after acetylene gas take calcium hydroxide as the waste residue of main component that calcium carbide hydrolysis obtains.Add the ultimate compression strength of energy Concrete Structure on the one hand in lightweight foam soil, also can accomplish utilization of waste material, reduce the cost of lightweight foam soil.
Whipping agent adopts hydrogen peroxide whipping agent, and carry out the object of foaming in time after utilizing slurry to mix with whipping agent, after foaming agent foam, the gas of generation is full of cement slurry, and cement slurry is dispersed, and product uniform pore diameter substantially increases the performance of foam concrete.Second time of foaming is carried out by adopting micro foam agent, while the extraordinary heat-insulating property of acquisition, also obtain the intensity and performance not easy to crack that meet engine request, comparatively ideal solve building thermal insulation material heat-insulating property and intensity, easy to crack between contradiction, drastically increase the stability of lightweight foam soil, resistance to compression, the performance such as impervious, ensure cement dispersion effect and dispersion stabilization, effectively improve lightweight foam soil intensity and weather resistance.
Also added water-resisting agent in lightweight foam soil, cement waterproof agent is a kind of chemical admixture, is added in cement, and when cement setting hardens, volumetric expansion thereupon, plays compensate for shrinkage and tension reinforcing steel bar produces prestress and abundant filling concrete gap.Calcium stearate of the present invention and Zinic stearas water-resisting agent are novel water proof anti-seepage material of construction, the sand-cement slurry stirred with higher aliphatic acids mortar waterproof agent or concrete, do not produce fine crack and pore, entirety can be formed with cement basal plane after construction, formed and the permanent waterproof layer of buildings with life cycle at upstream face and back side, higher aliphatic acids mortar waterproof agent have long, applied widely, the construction of waterproof life-span simply, the feature of low, the safety and environmental protection (reaching oral, non-toxic rank) of cost.Can certainly inorganic aluminate water-proof agent be adopted, based on water proof anti-seepage function, have microdilatancy simultaneously concurrently, increase degree of compactness function, diminishing, slow setting and the early model such as strong can be mixed with according to requirement of engineering.This water-resisting agent good water-proof effect, construct simple and easy, construction costs is cheap, is applicable to rigid structure self waterproof of the new constructions such as mortar, concrete structure underground works, pond, water tower, bridge, culvert, tunnel, harbour, dykes and dams power station.
The preparation method of lightweight foam soil of the present invention:
1) automatization foam cement device Host is utilized to control, by the pump-out of Frequency Converter Control water pump, the stirring velocity of stirrer and the transfer rate of transfer roller, in stirrer, the water of described proportioning is added by pipeline, simultaneously, in stirrer, cement is added by described proportioning, mixing material, suds-stabilizing agent, water reducer, rubber powder, toughener and water-resisting agent, stirred by stirrer, utilize Frequency Converter Control stirring velocity, guarantee that anhydrous walk can carry out pouring construction, wherein, water pump, the incoming frequency of stirrer and transfer roller all controls within the scope of 50 ~ 70HZ,
2) utilize automatization foam cement device Host to control, by ram pump and air compressor machine, micro foam agent is made foam; Require foam dry, even, flexible as far as possible, by the number of Frequency Converter Control foam solution, foam solution is extracted in pipeline by ram pump, simultaneously, air compressor machine provides gas to pipeline, the size of gas is controlled by ball valve, and foam solution runs into the effect of gas, and produces foam by steel wire lump strainer;
3) utilize automatization foam cement device Host to control, start and take out slurry program, Frequency Converter Control takes out the speed of slurry, to control the unit weight of final finished; Taking out the main effect of slurry frequency transformer is exactly the size controlling to take out slurry amount, if finished product unit weight is out inadequate, just can improve parameter value i.e. the hertz number of frequency transformer, within the unit time, the amount of cement slurry can be increased, on the contrary, if unit weight is large, the parameter value of frequency transformer just can be reduced;
4) under automatization foam cement device Host controls, the slurry respectively prepared by step 1) by described proportioning and step 2) foam prepared is transported to Homogeneous phase mixing in mixing tank and obtains mixed slurry; Mixing tank of the present invention, it is a kind of easy mixing equipment, inside establish mace, foam is transported in mixing tank by foam pipe, and slurry pumps in mixing tank by hose pump, both are at mixing tank endomixis, utilize cement slurry and foam in mixing tank, the projection running into mace surrounding carries out colliding, seething, and then reaches the object of mixed slurry and foam;
5) row establishes pipeline or utilizes pump truck to carry out carrying, pouring into a mould.
The present invention is applied to the component on site construction method of the lightweight foam soil of Abutment Back backfill, comprises the steps:
1) working-yard leveling process, and lay 10 ~ 20 centimeters of thick road surfaces with rubble, be convenient to placing installation and march into the arena;
2) according to design paper and job specifications requirement, release back filling behind abutment scope and elevation range, use lime to spill platform back of the body boundary of works area;
3) excavate according to backfill scope, the cooperation of excavation usage mining machine is manually carried out, and within the scope of works 50cm, use is manually excavated, and has excavated temporary drain, is caused by surface water outside boundary of works area;
4) for excavated Abutment Back backfill edges of regions outboard template is set, and Abutment Back backfill region by between partiting template according to 10 ~ 15 meters of intervals, construction joint is set;
5) by placing installation, lightweight foam soil is delivered to backfill region to build.
Adopt placement layer by layer when building, have until lower floor's lightweight foam soil and carry out upper strata after initial strength and build, the timed interval is 12 ~ 24 hours, and every layer height is at 0.8 ~ 1.5 meter.
During placement layer by layer when distance 50-80 centimetres, bottom and 50-80 centimetres, top, lay layer of steel wire mesh sheet respectively.
Abutment Back is filled to large volume lightweight foam soil and builds, disjunctor builds the shortcoming that there will be heat resistanceheat resistant anti-freezing property difference, therefore placement layer by layer and method that construction joint is set is adopted to reduce the volume of every block lightweight foam soil, according to the climatic condition of working-yard, if summer temperature is too high or winter temperature is too low, lightweight foam soil construction joint interval reduces, the every layer height of placement layer by layer reduces, if summer temperature is not high or winter temperature is not low, lightweight foam soil construction joint interval increases, the every layer height of placement layer by layer increases, standard can appropriate change, but change scope is above-mentioned to be limited.
Light filling foam soil of the present invention has that density is little, quality is light, intensity is greater than conventional backfill soil, speed of application is fast, fill rear formation entirety, shock resistance is good, without lateral pressure, to advantages such as foundation load are little.After using lightweight foam soil to fill, Abutment Back is in overconsolidation state, reduces the settlement after construction of sedimentation and non-uniform settling, thoroughly elimination abutment back embankment filler itself thus, avoids Bridgehead-Jumping Disease, have obvious technical superiority.Although it is high that lightweight foam soil fills cost more conventional backfill soil early stage, significantly can reduce work backstage back of the body maintenance cost, comprehensive cost is low, also has the economic advantages that cost performance is higher.
Due to light foam penus light material, little to foundation load after filling, significantly reduce basement process intensity, save the basement process duration.After lightweight foam soil cast before initial set, have good mobility, fill self-compacting, can avoid the defect that conventional fillers filling is not full, application property is strong.Lightweight foam soil has independence, can vertically pour into a mould, and when the duration is tighter, every day vertically can fill 0.8 ~ 1.5m; After casting complete without the need to strong rammer, without the need to rolling, can direct road surface pavement structural sheet.Speed of application is fast, can effectively save the Abutment Back process duration.
Embodiment
Embodiment one
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 350 parts, mixing material: 80 parts, water: 120 parts, conditioning agent: 35 parts, whipping agent: 10 parts, micro foam agent: 6 parts, water-resisting agent: 5 parts.
Described in the present embodiment, mixing material comprises granulated blast-furnace slag.
Conditioning agent described in the present embodiment comprises water reducer, rubber powder, toughener, suds-stabilizing agent.
In the present embodiment, whipping agent is hydrogen peroxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Described in the present embodiment, water-resisting agent comprises inorganic aluminate water-proof agent.
Embodiment two
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 220 parts, mixing material: 40 parts, water: 180 parts, conditioning agent: 40 parts, whipping agent: 14 parts, micro foam agent: 8 parts, water-resisting agent: 5 parts.
Described in the present embodiment, mixing material comprises coal gangue.
Conditioning agent described in the present embodiment comprises water reducer, rubber powder, toughener, suds-stabilizing agent.
In the present embodiment, whipping agent is magnesium oxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Described in the present embodiment, water-resisting agent comprises inorganic aluminate water-proof agent.
Embodiment three
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 300 parts, mixing material: 70 parts, water: 150 parts, conditioning agent: 35 parts, whipping agent: 12 parts, micro foam agent: 7 parts, water-resisting agent: 6 parts.
Described in the present embodiment, mixing material comprises carbide slag.
Conditioning agent described in the present embodiment comprises water reducer, rubber powder, toughener, suds-stabilizing agent.
In the present embodiment, whipping agent is hydrogen peroxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Described in the present embodiment, water-resisting agent comprises inorganic aluminate water-proof agent.
Embodiment four
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 350 parts, mixing material: 80 parts, water: 140 parts, conditioning agent: 30 parts, whipping agent: 5 parts, micro foam agent: 3 parts, water-resisting agent: 5 parts.
Described in the present embodiment, mixing material comprises granulated blast-furnace slag.
Conditioning agent described in the present embodiment comprises water reducer, rubber powder, suds-stabilizing agent.
In the present embodiment, whipping agent is hydrogen peroxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Described in the present embodiment, water-resisting agent comprises inorganic aluminate water-proof agent.
Embodiment five
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 400 parts, mixing material: 100 parts, water: 170 parts, conditioning agent: 25 parts, whipping agent: 7 parts, micro foam agent: 3 parts, water-resisting agent: 6 parts.
Described in the present embodiment, mixing material comprises carbide slag.
Conditioning agent described in the present embodiment comprises water reducer, toughener, suds-stabilizing agent.
In the present embodiment, whipping agent is hydrogen peroxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Water-resisting agent described in the present embodiment comprises calcium stearate, Zinic stearas.
Embodiment six
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 230 parts, mixing material: 80 parts, water: 150 parts, conditioning agent: 42 parts, whipping agent: 10 parts, micro foam agent: 8 parts, water-resisting agent: 9 parts.
Described in the present embodiment, mixing material comprises granulated blast-furnace slag.
Conditioning agent described in the present embodiment comprises rubber powder, toughener, suds-stabilizing agent.
In the present embodiment, whipping agent is hydrogen peroxide.
Cement described in the present embodiment adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Described in the present embodiment, water-resisting agent comprises inorganic aluminate water-proof agent.
Embodiment seven
Be applied to a lightweight foam soil for Abutment Back backfill, comprise the composition material of following weight part: cement: 300 parts, mixing material: 80 parts, water: 160 parts, conditioning agent: 35 parts, whipping agent: 10 parts, micro foam agent: 6 parts, water-resisting agent: 8 parts.
Further, described mixing material comprises granulated blast-furnace slag.
Further, described conditioning agent comprises water reducer, rubber powder, toughener, suds-stabilizing agent.
Further, whipping agent is hydrogen peroxide.
Further, described cement adopts PC42.5 cement, and described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
Further, described water-resisting agent comprises calcium stearate, Zinic stearas.
In following table, dry density is lightweight foam soil solidification 28d, and surperficial natural gas does the quality of the unit volume under state.
Ultimate compression strength, under normal curing condition (temperature 20 ± 30C, relative humidity is in 90%), maintenance to 28 day length of time, is called compressive strength of concrete with the compression strength value that standard test methods records.
Thermal conductivity refers under steady heat transfer condition, the material that 1m is thick, the temperature difference of both side surface be 1 degree (K, DEG C), within 1 second (1S), the heat transmitted by 1 square area.
Solidification rate of descent is newly mixed after lightweight foam soil solidifies in the cubes die trial of 100mm × 100mm × 100mm, the ratio of its surface settlement.
The pressure that lightweight foam soil causes abutment to the load on basis.
| Parameter | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 |
| Dry density (kg/m3) | 540 | 225 | 318 | 436 | 488 | 340 | 327 |
| Ultimate compression strength (Mpa) | 3.9 | 1.2 | 3.8 | 2.5 | 3.2 | 1.6 | 3.6 |
| Thermal conductivity (W/m.k) | 0.033 | 0.011 | 0.014 | 0.024 | 0.041 | 0.016 | 0.015 |
| Freeze thawing (15 times) weight loss | ＜3.5％ | ＜3.3％ | ＜2.8％ | ＜3.3％ | ＜3.3％ | ＜3.4％ | ＜2.9％ |
| Freeze thawing (15 times) loss of strength | ＜3.7％ | ＜3.3％ | ＜3.1％ | ＜3.7％ | ＜3.9％ | ＜3.8％ | ＜3.2％ |
| Fire prevention | Do not fire | Do not fire | Do not fire | Do not fire | Do not fire | Do not fire | Do not fire |
| Solidification rate of descent (%) | 0.66 | 1.77 | 0.89 | 1.23 | 1.11 | 1.89 | 0.91 |
| To the load (kn/m2) on basis | 44 | 38 | 39 | 42 | 43 | 39 | 39 |
Upper table can find out embodiment three and embodiment seven effect better, and embodiment three is optimum.
Light filling foam soil of the present invention has that density is little, quality is light, intensity is greater than conventional backfill soil, speed of application is fast, fill rear formation entirety, shock resistance is good, without lateral pressure, to advantages such as foundation load are little.After using lightweight foam soil to fill, Abutment Back is in overconsolidation state, reduces the settlement after construction of sedimentation and non-uniform settling, thoroughly elimination abutment back embankment filler itself thus, avoids Bridgehead-Jumping Disease, have obvious technical superiority.Although it is high that lightweight foam soil fills cost more conventional backfill soil early stage, significantly can reduce work backstage back of the body maintenance cost, comprehensive cost is low, also has the economic advantages that cost performance is higher.
Claims (10)
1. one kind is applied to the lightweight foam soil of Abutment Back backfill, it is characterized in that: the composition material comprising following weight part: cement: 150-400 part, mixing material: 20-120 part, water: 50-200 part, conditioning agent: 15-50 part, whipping agent: 5-15 part, micro foam agent: 2-10 part, water-resisting agent: 5-10 part.
2. be applied to the lightweight foam soil of Abutment Back backfill as claimed in claim 1, it is characterized in that: described mixing material comprise in granulated blast-furnace slag, coal gangue, carbide slag one or more.
3. be applied to the lightweight foam soil of Abutment Back backfill as claimed in claim 1, it is characterized in that: described conditioning agent comprise in water reducer, rubber powder, toughener, suds-stabilizing agent one or more.
4. be applied to the lightweight foam soil of Abutment Back backfill as claimed in claim 1, it is characterized in that: whipping agent is one or more in hydrogen peroxide, aluminium powder, magnesium oxide and magnesium chloride.
5. be applied to the lightweight foam soil of Abutment Back backfill as claimed in claim 1, it is characterized in that: described cement adopts PC42.5 cement, described micro foam agent is for carry out 1:2000 dilution by whipping agent and water, and it is obtained to carry out trace foaming by ram pump.
6. be applied to the lightweight foam soil of Abutment Back backfill as claimed in claim 1, it is characterized in that: described water-resisting agent comprise in inorganic aluminate water-proof agent, calcium stearate, Zinic stearas one or more.
7. be applied to a preparation method for the lightweight foam soil of Abutment Back backfill, it is characterized in that: comprise the steps:
1) automatization foam cement device Host is utilized to control, by the pump-out of Frequency Converter Control water pump, the stirring velocity of stirrer and the transfer rate of transfer roller, in stirrer, the water of described proportioning is added by pipeline, simultaneously, in stirrer, cement is added by described proportioning, mixing material, suds-stabilizing agent, water reducer, rubber powder, toughener and water-resisting agent, stirred by stirrer, utilize Frequency Converter Control stirring velocity, guarantee that anhydrous walk can carry out pouring construction, wherein, water pump, the incoming frequency of stirrer and transfer roller all controls within the scope of 50 ~ 70HZ,
2) utilize automatization foam cement device Host to control, by ram pump and air compressor machine, micro foam agent is made foam;
3) utilize automatization foam cement device Host to control, start and take out slurry program, Frequency Converter Control takes out the speed of slurry, to control the unit weight of final finished;
4) under automatization foam cement device Host controls, the slurry respectively prepared by step 1) by described proportioning and step 2) foam prepared is transported to Homogeneous phase mixing in mixing tank and obtains mixed slurry;
5) row establishes pipeline or utilizes pump truck to carry out carrying, pouring into a mould.
8. be applied to a constructional method for the lightweight foam soil of Abutment Back backfill, it is characterized in that: comprise the steps:
1) working-yard leveling process, and lay 10 ~ 20 centimeters of thick road surfaces with rubble, be convenient to placing installation and march into the arena;
2) according to design paper and job specifications requirement, release back filling behind abutment scope and elevation range, use lime to spill platform back of the body boundary of works area;
3) excavate according to backfill scope, the cooperation of excavation usage mining machine is manually carried out, and within the scope of works 50cm, use is manually excavated, and has excavated temporary drain, is caused by surface water outside boundary of works area;
4) for excavated Abutment Back backfill edges of regions outboard template is set, and Abutment Back backfill region by between partiting template according to 10 ~ 15 meters of intervals, construction joint is set;
5) by placing installation, lightweight foam soil is delivered to backfill region to build.
9. be applied to the constructional method of the lightweight foam soil of Abutment Back backfill as claimed in claim 8, it is characterized in that: when building, adopt placement layer by layer, have until lower floor's lightweight foam soil and carry out upper strata after initial strength and build, the timed interval is 12 ~ 24 hours, and every layer height is at 0.8 ~ 1.5 meter.
10. be applied to the constructional method of the lightweight foam soil of Abutment Back backfill as claimed in claim 9, it is characterized in that: during placement layer by layer when distance 50-80 centimetres, bottom and 50-80 centimetres, top, lay layer of steel wire mesh sheet respectively.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225267A (en) * | 2013-03-29 | 2013-07-31 | 天津二十冶建设有限公司 | Construction method of deep and thick soft soil foundation bed bridge abutment |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN103387413A (en) * | 2013-07-26 | 2013-11-13 | 河南华泰建材开发有限公司 | Double-foaming cellular concrete and production method thereof |
-
2015
- 2015-06-29 CN CN201510365569.2A patent/CN105000845A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103225267A (en) * | 2013-03-29 | 2013-07-31 | 天津二十冶建设有限公司 | Construction method of deep and thick soft soil foundation bed bridge abutment |
| CN103304193A (en) * | 2013-06-19 | 2013-09-18 | 河南华泰建材开发有限公司 | Lightweight aggregate foam concrete and production method thereof |
| CN103387413A (en) * | 2013-07-26 | 2013-11-13 | 河南华泰建材开发有限公司 | Double-foaming cellular concrete and production method thereof |
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| CN107034789B (en) * | 2017-05-19 | 2019-08-23 | 武汉市市政建设集团有限公司 | Abutment Back combination backfill construction method |
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