CN109577306A - A kind of foundation treatment technology and construction method of eps foam barged-in fill - Google Patents
A kind of foundation treatment technology and construction method of eps foam barged-in fill Download PDFInfo
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- CN109577306A CN109577306A CN201811431147.0A CN201811431147A CN109577306A CN 109577306 A CN109577306 A CN 109577306A CN 201811431147 A CN201811431147 A CN 201811431147A CN 109577306 A CN109577306 A CN 109577306A
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- cofferdam
- dredger
- cement
- hydraulic reclamation
- eps
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
Abstract
The invention discloses the foundation treatment technologies and construction method of a kind of eps foam barged-in fill, the dredging silt of dredger sucking, polystyrene packaging foam are crushed into the particle to be formed and cement these three materials through pulverizer, it is displaced by pipeline in the feed inlet of the double-deck horizontal axis concrete mixer, in mixing drum body according to a certain percentage after mixing evenly, artificial hydraulic reclamation is carried out through discharge port connecting pipe, the basement process after traditional artificial hydraulic reclamation is not needed by this artificial hydraulic reclamation technology.Eps foam of the present invention mixes artificial hydraulic fill foundation processing technique and construction method have many advantages, such as the construction period is short, settlement of foundation is small, project cost is low, using waste, the problems such as complicated ground treatment after can effectively solving traditional artificial hydraulic reclamation and long construction period.It can be widely used for the engineering fields such as coastal, riverine, the artificial hydraulic reclamation in lake.
Description
Technical field
The present invention relates to the foundation treatment technologies and construction method of a kind of eps foam barged-in fill, belong to foundation treatment technology
Field.
Background technique
Human society consumes the acceleration of earth resource, so that population expansion, soil anxiety, energy shortage, environmental degradation
Accelerate to present etc. a series of problems.Reclaiming land around sea can effectively solve a series of this problem, take measures to be first to build sea wall again
Implement land reclamation or epeirogenetic of banketing.Due to China coastal seas there is it is abundant enter ooze is husky and mud, so general using blowing
Reclaiming land around sea is realized in the measure for filling out epeirogenetic.And in terms of land reclamation engineering practice, the areas such as Holland, Japan, Singapore, Hong Kong
It is more.Wherein, the land reclamation area of Singapore is larger, and about 600 square kilometres of soil is increased by land reclamation, is accounted for whole
A country's area about 10%.
The artificial barged-in fill of sea reclamation at present and rivers and lakes has high-moisture percentage, high-compressibility, high void ratio, strong
The unfavorable engineering characteristics such as degree and bearing capacity are extremely low.Existing reclaimed ground reinforcing and processing method is divided into physics side by reinforcement principle
Method and chemical method.Physical method is by occurring pressure difference, and then discharge pore water in the soil body, such as heavy-tamping method, vacuum method
Deng；Chemical method adds corresponding additive and reacts with the material composition in the soil body, and then makes soil stabilization, such as stir
Mix stake etc..
(1) heavy-tamping method is preferable to consolidation effects such as cohesive soil, the silts of sand, low saturation, but the relatively deep, soil body to buried depth
Thicker Muddy Bottoms clay, silty clay and sludge treatment effect are not satisfactory while settling amount Con trolling index, shadow is not achieved
It rings depth and bearing capacity is inadequate.
(2) vacuum method equipment and construction technology are fairly simple, without large-scale plant, also do not need a large amount of
Artificial preloading, but coastal more distribution mudflat sludges, are not able to satisfy a large amount of medium coarse sand required for traditional vacuum preloading technique,
The vacuum method construction period is too long simultaneously.
(3) mixing pile is that the reinforcings such as mud, Muddy Bottoms cohesive soil and the higher cohesive soil of water content, silt are imitated to barged-in fill
Fruit is preferable, but mechanical equipment can not enter scene at any time after the completion of hydraulic reclamation, influence the construction period.
Summary of the invention
It is an object of the invention to solve the problems, such as above-mentioned difficulties and, a kind of eps foam reclaimed ground processing technique is provided
And construction method.The present invention is using polystyrene foam, water, curing materials, dredging silt in the double-deck horizontal axis concrete mixer
In stirring form EPS light mixed soil.Subsequent basement process will not be needed after the artificial hydraulic reclamation of EPS light mixed soil, while can
To control the match ratio of EPS light mixed soil, the construction period is short, settlement of foundation is small, intensity is high, project cost is low etc. is met
Requirements.
The present invention is realized by following technical proposals step:
(1) multiple cofferdam areas are arranged to designed elevation in pre- hydraulic reclamation field, and the channel of dredger disengaging is stayed in each cofferdam area；
(2) dredger first drives into the area of first cofferdam, carries out dredging by dredger and reaches substrate design requirement, and drains
Water, dredger are driven out to and reach second cofferdam area, the inlet and outlet in first cofferdam area are closed up；
(3) dredging silt is sucked using dredger in second cofferdam area, the double-deck horizontal axis concrete is injected by sludge pipe and is stirred
It mixes in machine；
(4) scene crushes discarded polystyrene foam block body with vertical crusher and obtains particle, and connection below discharge port
Feed hopper on cement pneumatic transport equipment；
(5) cement pour into another feed hopper on cement pneumatic transport equipment and each feed hopper installation control valve come control into
Expect speed, cement, polystyrene foam particles are transported to the double-deck horizontal axis coagulation by pipeline by cement pneumatic transport equipment simultaneously
In native blender；
(6) by the feed hopper control valve and the double-deck horizontal axis concrete mixer on control cement pneumatic transport equipment
Inlet control valve, makes that polystyrene foam particles, dredging silt, cement is according to certain proportion while to be injected into the double-deck horizontal axis mixed
Uniform stirring forms EPS light mixed soil in solidifying soil blender, through the artificial hydraulic reclamation of discharge port connecting pipe to first cofferdam area
It is interior, it blows and flattens and conserved after filling up to grade；
(7) next dredger is driven out to the second cofferdam area to third cofferdam area, and closes up the inlet and outlet in second cofferdam area；It will
The dredging silt and EPS particle, cement transportation that dredger sucks in the area of third cofferdam are into the double-deck horizontal axis concrete mixer
Mix is uniformly and hydraulic reclamation is to second cofferdam area, blows and flattens and conserved after filling up to grade；
(8) and so on above-mentioned construction procedure, the complete all cofferdam areas of hydraulic reclamation and maintenance are to regulation age.
After the pre- hydraulic reclamation field sets cofferdam, discharge outlet that no setting is required.
The quality of polystyrene foam particles, cement and dredging silt in the EPS light mixed soil of the artificial hydraulic reclamation
Percentage is respectively 1.8%~4%, 8%~24%, and the water content of dredging silt is controlled in 60%-80%.
The cement pneumatic transport equipment used in the present invention is the pneumatic transport equipment of ideal granular material, utilizes strength
The effect of the high-speed flow of conveying equipment injector works, convenient for the conveying and receipts of cement and polystyrene foam particles
Collection, the cement pneumatic transport equipment is conveying equipment commonly used in the art.
The double-deck horizontal axis concrete mixer needed in work progress of the present invention, structure is as shown in Figure 1, include motor, connection
Axis device, retarder, feed inlet control valve, stirring cylinder, upper layer stirring blade, upper layer agitating shaft, U-tube, lower layer's stirring blade,
Stir machine support, lower layer's agitating shaft and discharge port composition；Motor, shaft coupling, retarder are serially connected to stirring cylinder one end, into
Material mouth control valve is mounted on stirring cylinder, and stirring cylinder is the double-deck stirring cylinder, and cylinder is stirred on upper layer and cylinder stirs in lower layer
It is connected by U-tube, upper layer stirring blade is fixed in the mixing drum body of upper layer by upper layer agitating shaft, and lower layer's stirring blade passes through
Lower layer's agitating shaft is fixed in lower layer's mixing drum body, and discharge port is located at the other side of stirring cylinder；Stirring machine support, which is mounted on, to be stirred
The lower section for mixing cylinder is used to support stirring cylinder.
The double-deck horizontal axis concrete mixer used in the present invention has following compared with existing horizontal axis concrete mixer
Improve: 1. increase automatic feed mouth, and control valve controls raw material；2. being changed to upper layer and lower layer, mixing effect is improved；3. in design
It is connected with U-tube for two layers down；4. the discharging functions in conveying may be implemented in the double-deck horizontal axis concrete mixer improved.
The double-deck horizontal axis concrete mixer feed inlet control valve is connect with material conveying pipeline, dredging silt, polystyrene
Foam beads, cement are injected simultaneously in stirring cylinder upper layer, and by U-tube to lower layer, entire upper and lower level is sufficiently stirred into
EPS light mixed soil, bilayer can reinforce mixing effect.
Used bilayer horizontal axis concrete mixer discharge port installation has the pipeline of certain length screw thread, realizes that side is defeated
Expect side discharging.EPS light mixed soil by have a segment length screw thread pipeline when can reach more fully mixing effect.
A kind of described eps foam reclaimed ground processing technique and construction method after artificial hydraulic reclamation is complete maintenance to rule
The construction of superstructure can be started by determining age.
Dredger is to twist suction or rake suction in a kind of described eps foam reclaimed ground processing technique and construction method
Dredger.
The dredging silt for digging out dredger in the present invention forms EPS light mixed soil with EPS particle, cement mixing, by
In wherein joined certain cement, therefore substantially reduce compared to its compressibility for former dredging silt, intensity and bearing capacity energy
Power greatly improves, simultaneously because certain EPS particle is added, quality mitigates significantly, the load generated to the foundation soil to underlie
It greatly reduces.
Traditional artificial barged-in fill, due to by any processing, not needing using basement process such as preloading, vacuum preloadings
Method accelerates its consolidation, just can be carried out subsequent engineering construction, and the time usually consolidated is long and inefficient；And it is of the invention
Dredging silt and EPS particle, cement mixing form to the composite soil of high-strength light, maintenance 7 days later can directly above into
The construction of row engineering, and the load generated to lower section foundation soil is small.
The utility model has the advantages that
The artificial hydraulic reclamation eps foam light mixed soil foundation treatment technology of the present invention and construction method have reached the technical indicator of engineering
It is required that remarkable advantage is:
(1) dredging silt in the area of cofferdam is taken full advantage of, while controlling the cooperation of the eps foam light mixed soil in engineering
Than, therefore the engineering problems such as traditional artificial barged-in fill high-moisture percentage, high-compressibility, low-intensity, low bearing capacity for showing can
To be resolved.
(2) " can be filled out when digging ", manufactured eps foam mixes artificial barged-in fill and can form rapidly, meet bearing capacity
Requirement, and do not need other subsequent basement process, the construction period can be greatly shortened.
(3) when pre-fill field sets cofferdam, cofferdam does not need setting discharge outlet.
(4) eps foam mixes artificial hydraulic fill foundation processing technique and construction method and can be led to according to Site Design intensity requirement
Cross the feed hopper control valve on control cement pneumatic transport equipment and the inlet control valve on the double-deck horizontal axis concrete mixer
To control inlet amount, the intensity of change EPS barged-in fill.
(5) raw material soil uses dredging silt, and eps foam particle derives from waste polystyrene packaging foam block, waste
While utilization, and environment is protected, meets the theory of sustainable development.
Detailed description of the invention
The double-deck horizontal axis concrete mixer schematic diagram of the artificial dredge fill of Fig. 1-；
Wherein, 1- motor, 2- shaft coupling, 3- retarder, 4- feed inlet control valve, 5- stir cylinder, the upper layer 6- stirring blade, 7-
Upper layer agitating shaft, 8-U shape pipe, 9- lower layer stirring blade, 10- stir machine support, 11- lower layer agitating shaft, 12- discharge port.
Fig. 2-bilayer horizontal axis concrete mixer (a-a section) right view；
Wherein, the upper layer 6- stirring blade, the upper layer 7- agitating shaft, 9- lower layer stirring blade, 11- lower layer agitating shaft.
Stir cylinder perspective view in Fig. 3-part；
Wherein, cylinder is stirred on 8-U shape pipe, the upper layer 13-, and cylinder stirs in 14- lower layer.
Fig. 4-blast-filled ground plan view.
Specific implementation method
Embodiment 1
The double-deck horizontal axis concrete mixer needed in work progress of the present invention, structure as shown in Figure 1, include motor, shaft coupling,
Retarder, feed inlet control valve, stirring cylinder, upper layer stirring blade, upper layer agitating shaft, U-tube, lower layer's stirring blade, stirring
Machine support, lower layer's agitating shaft and discharge port composition；Motor, shaft coupling, retarder are serially connected to stirring cylinder one end, feed inlet
Control valve is mounted on stirring cylinder, and stirring cylinder is the double-deck stirring cylinder, as shown in figure 3, upper layer stirring cylinder is stirred with lower layer
It mixes cylinder to be connected by U-tube, upper layer stirring blade is fixed in the mixing drum body of upper layer by upper layer agitating shaft, lower layer's paddle
Piece is fixed in lower layer's mixing drum body by lower layer's agitating shaft, and discharge port is located at the other side of stirring cylinder；Stir machine support peace
Mounted in the lower section of stirring cylinder, it is used to support stirring cylinder.
A kind of foundation treatment technology and construction method of eps foam barged-in fill, include the following steps:
(1) 4 cofferdam area's (see figure 4) is set to designed elevation in pre- blast-filled ground, can be arranged not according to the region of live hydraulic reclamation
With cofferdam area size, and the channel that 4 cofferdam area stays dredger that can pass in and out, dredger first drive into the cofferdam I, the row of installing
The dredging silt that dredger sucks is discharged to outside the area of cofferdam by mud pipe by sludge pipe, until reaching substrate design mark in the cofferdam I
Height, and drain water.Then, dredger is driven out to and reachesIn number cofferdam, the inlet and outlet in the cofferdam I are closed up.
It (2) will be where dredgerDredging silt in number cofferdam is injected into the double-deck horizontal axis concrete by sludge pipe and stirs
It mixes in machine；Waste polystyrene (EPS) packaging foam block is crushed using vertical crusher simultaneously, vertical crusher discharge port
Lower section connects the feed hopper on cement pneumatic transport equipment, and cement pours another feed hopper on cement pneumatic transport equipment into,
And control valve is installed to control charging rate in the bottom of each feed hopper.Cement pneumatic transport equipment by pipeline cement,
Polystyrene foam particles are transported to simultaneously in the double-deck horizontal axis concrete mixer.The double-deck horizontal axis concrete mixer in scene
It is placed on dredger, vertical crusher and cement pneumatic transport equipment are placed on the bank near hydraulic reclamation field.
(3) pass through the control valve (flange form in cement pneumatic transport equipment (good luck Machinery Manufacturing Co., Ltd., Gongyi City)
Rick Rashid valve Co., Ltd is won in butterfly valve, Tianjin) and control valve control dredging silt on the double-deck horizontal axis concrete mixer,
The eps foam particle of crushing and the content of cement, and the water content for twisting head or suction nozzle control dredging silt of dredger
It is 60%~80%, makes up to suitable match ratio.
(4) the double-deck horizontal axis concrete mixer feed inlet control valve is connect with material conveying pipeline, dredging silt, polyphenyl second
Alkene foam, cement are injected simultaneously in stirring cylinder upper layer, and by U-tube to lower layer, EPS is sufficiently stirred into entire upper and lower level
Light mixed soil, wherein the mass percent of waste polystyrene foam, cement and dredging silt is respectively 3%, 8%, and dredging is become silted up
The water content of mud is 60%.
(5) pipeline of the discharge port connection with certain length screw thread carries out artificial hydraulic reclamation, and EPS light mixed soil hydraulic reclamation is arrivedIn number cofferdam, when pipeline of the EPS light mixed soil by having a segment length screw thread, can reach more fully mixing effect.
Discharge opening pipeline is placed on the bottom in hydraulic reclamation region, and it is winged to guarantee that EPS light mixed soil is not blown during hydraulic reclamation.When pipeline is too long
Or pumpability is insufficient, can in the duct between pump machine is installed.
(6) dredger is driven out toNumber cofferdam area arrivesNumber cofferdam area, and close upThe inlet and outlet in number cofferdam area；It utilizesNumber
The uniform mix in the double-deck horizontal axis concrete mixer is light at EPS with eps foam particle, cement for the dredging silt that cofferdam digs up
Matter composite soil, which is blown, to be filled intoIn number cofferdam area, blows and flatten and conserved after filling up to grade；
(7) dredger is driven out toNumber cofferdam area arrivesNumber cofferdam area, and close upThe inlet and outlet in number cofferdam area；It utilizesIt number encloses
Dredging silt that weir digs up and eps foam particle, cement in the double-deck horizontal axis concrete mixer uniform mix at EPS lightweight
Composite soil, which is blown, to be filled intoIn number cofferdam area, blows and flatten and conserved after filling up to grade.
(8) dredger is driven out toNumber cofferdam area, and close upThe inlet and outlet in number cofferdam area；Utilize the sea area of cofferdam periphery
The dredging silt and eps foam particle, cement digged up uniform mix in the double-deck horizontal axis concrete mixer is mixed at EPS lightweight
Conjunction soil, which is blown, to be filled intoIn number cofferdam area, blows and flatten and conserved after filling up to grade.
During hydraulic reclamation, it should which the principle for abiding by " from the inside to surface, from low to high, being layered hydraulic reclamation from centre to both sides " carries out
Construction, hydraulic reclamation is flattened after the completion, while being identified to construction area, and carry out relevant monitoring in time, is reached and is set
After counting index request, that is, terminates to construct and conserve by regulation age 7 days.The basement process after traditional artificial hydraulic reclamation is not needed,
And then it can start subsequent engineering construction.The complete place of hydraulic reclamation can reach 28 days normal intensities of maintenance by 7 days or so
70%, 7d unconfined compressive strength be 260kPa, 28d unconfined compressive strength be 370kPa, can satisfy in next step construction want
It asks, while construction period greatly shortens.
Above step is only to be not regarded as limitation of the present invention to further example of the invention, cofferdam area quantity and
Its designed elevation can take the circumstances into consideration to adjust as the case may be.
Claims (7)
1. a kind of foundation treatment technology and construction method of eps foam barged-in fill, which is characterized in that including following construction procedure:
(1) multiple cofferdam areas are arranged to designed elevation in pre- hydraulic reclamation field, and the channel of dredger disengaging is stayed in each cofferdam area；
(2) dredger first drives into the area of first cofferdam, carries out dredging by dredger and reaches substrate design requirement, and drains
Water, dredger are driven out to and reach second cofferdam area, the inlet and outlet in first cofferdam area are closed up；
(3) dredging silt is sucked using dredger in second cofferdam area, the double-deck horizontal axis concrete is injected by sludge pipe and is stirred
It mixes in machine；
(4) scene crushes discarded polystyrene foam block body with vertical crusher and obtains particle, and connection below discharge port
Feed hopper on cement pneumatic transport equipment；
(5) cement pour into another feed hopper on cement pneumatic transport equipment and each feed hopper installation control valve come control into
Expect speed, cement, polystyrene foam particles are transported to the double-deck horizontal axis coagulation by pipeline by cement pneumatic transport equipment simultaneously
In native blender；
(6) by the feed hopper control valve and the double-deck horizontal axis concrete mixer on control cement pneumatic transport equipment into
Expect control valve, makes polystyrene foam particles, dredging silt, cement according to certain proportion while being injected into the double-deck horizontal axis coagulation
Uniform stirring forms EPS light mixed soil in native blender, through in the artificial hydraulic reclamation of discharge port connecting pipe to first cofferdam area,
It blows and flattens and conserved after filling up to grade；
(7) next dredger is driven out to the second cofferdam area to third cofferdam area, and closes up the inlet and outlet in second cofferdam area；It will
The dredging silt and EPS particle, cement transportation that dredger sucks in the area of third cofferdam are into the double-deck horizontal axis concrete mixer
Mix is uniformly and hydraulic reclamation is to second cofferdam area, blows and flattens and conserved after filling up to grade；
(8) and so on above-mentioned construction procedure, the complete all cofferdam areas of hydraulic reclamation and maintenance are to regulation age.
2. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: pre- hydraulic reclamation field is after setting cofferdam, discharge outlet that no setting is required.
3. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: the mass percent of polystyrene foam particles, cement and dredging silt in the EPS light mixed soil of the artificial hydraulic reclamation
The water content of respectively 1.8%~4%, 8%~24%, dredging silt is controlled in 60%-80%.
4. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: the bilayer horizontal axis concrete mixer includes motor, shaft coupling, retarder, feed inlet control valve, stirring cylinder, upper layer
Stirring blade, upper layer agitating shaft, U-tube, lower layer's stirring blade, stirring machine support, lower layer's agitating shaft and discharge port composition；Electricity
Machine, shaft coupling, retarder are serially connected to stirring cylinder one end, and feed inlet control valve is mounted on stirring cylinder, stir cylinder
Cylinder is stirred for bilayer, upper layer stirring cylinder stirs cylinder with lower layer and is connected by U-tube, and upper layer stirring blade is stirred by upper layer
It mixes axis to be fixed in the mixing drum body of upper layer, lower layer's stirring blade is fixed in lower layer's mixing drum body by lower layer's agitating shaft, discharging
Mouth is located at the other side of stirring cylinder；Stirring machine support is mounted on the lower section of stirring cylinder.
5. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: the double-deck horizontal axis concrete mixer discharge port installation has the pipeline of certain length screw thread.
6. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: the construction that can start superstructure is conserved to regulation age after artificial hydraulic reclamation is complete.
7. the foundation treatment technology and construction method of a kind of eps foam barged-in fill according to claim 1, feature exist
In: the dredger is to twist suction or drag suction dredger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811431147.0A CN109577306B (en) | 2018-11-28 | 2018-11-28 | Foundation treatment technology and construction method of EPS foam dredger fill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431147.0A CN109577306B (en) | 2018-11-28 | 2018-11-28 | Foundation treatment technology and construction method of EPS foam dredger fill |
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| Publication Number | Publication Date |
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| CN109577306A true CN109577306A (en) | 2019-04-05 |
| CN109577306B CN109577306B (en) | 2021-01-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06220823A (en) * | 1993-01-14 | 1994-08-09 | Jdc Corp | Underwater reclamation method |
| CN1634691A (en) * | 2003-12-30 | 2005-07-06 | 株式会社千田工程 | Method and apparatus for manufacturing lightweight cured material, pipeline type mixing apparatus, curing agent supplier, and specific weight regulator |
| CN101560754A (en) * | 2009-04-29 | 2009-10-21 | 北京航空航天大学 | Construction process for blowing-filling sludge and reclaiming land from sea and device thereof |
| CN104310903A (en) * | 2014-10-08 | 2015-01-28 | 西安华陆环保设备有限公司 | Preparation method of foam plastic light-weight filler |
| CN105155511A (en) * | 2015-09-18 | 2015-12-16 | 平顶山市公路工程公司 | Rotating drum type swirl curing and stirring device and dredged sludge hydraulic reclamation method |
-
2018
- 2018-11-28 CN CN201811431147.0A patent/CN109577306B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06220823A (en) * | 1993-01-14 | 1994-08-09 | Jdc Corp | Underwater reclamation method |
| CN1634691A (en) * | 2003-12-30 | 2005-07-06 | 株式会社千田工程 | Method and apparatus for manufacturing lightweight cured material, pipeline type mixing apparatus, curing agent supplier, and specific weight regulator |
| CN101560754A (en) * | 2009-04-29 | 2009-10-21 | 北京航空航天大学 | Construction process for blowing-filling sludge and reclaiming land from sea and device thereof |
| CN104310903A (en) * | 2014-10-08 | 2015-01-28 | 西安华陆环保设备有限公司 | Preparation method of foam plastic light-weight filler |
| CN105155511A (en) * | 2015-09-18 | 2015-12-16 | 平顶山市公路工程公司 | Rotating drum type swirl curing and stirring device and dredged sludge hydraulic reclamation method |
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