CN109914345A - Mud hydraulic reclamation landscape island lightweight basement process key technology - Google Patents
Mud hydraulic reclamation landscape island lightweight basement process key technology Download PDFInfo
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- CN109914345A CN109914345A CN201910159185.3A CN201910159185A CN109914345A CN 109914345 A CN109914345 A CN 109914345A CN 201910159185 A CN201910159185 A CN 201910159185A CN 109914345 A CN109914345 A CN 109914345A
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Abstract
The invention belongs to environmental geotechnical technical fields, disclose a kind of mud hydraulic reclamation landscape island lightweight basement process key technology, comprising: the plan boundary line along landscape island ground sets steel sheet-pile cofferdam；River and lake dredging is executed, river and lake silt is obtained；Curing agent is added into dredging silt and bonding packing material forms utilizing solidified earth from sludge；It will treated that utilizing solidified earth from sludge is backfilling into cofferdam to pave carries out compaction in layers；Detection is sampled to soil sample after maintenance to regulation age, sludge solidification processing is completed after reaching design objective, forms landscape island high-strength light ground.The present invention provides a kind of pair of river-lake environments to pollute small, the strong mud hydraulic reclamation landscape island lightweight basement process key technology of structural reliability.
Description
Technical field
The present invention relates to environmental geotechnical technical fields, in particular to a kind of to utilize mud hydraulic reclamation landscape island lightweight ground
Handle key technology
Background technique
In order to be dredged and improved water quality to river, countries in the world have been carried out large-scale dredging engineering and
Dredging silt engineering, thus the every annual meeting in China generates several hundred million cubes of waste silt.Dredging silt moisture content and compressibility are high, strong
Spend low, some of mud also contain the pollutants such as heavy metal, therefore are difficult to be directly used as engineering material.Sludge solidification is resource
Change the effective way utilized, i.e., changes the size, form and physics of sludge granules by the way that curing materials are added in mud
Mud is finally become soil material and recycled by mechanical property.But many river and lakes are in down town, a large amount of sludge solidification
Soil needs to carry out strange land disposition, and transportation cost is very high, and the secondary pollution risk of environment is big.
Curing sludge hydraulic reclamation landscape island ground is utilized in the river and lake of down town, can be improved urban rivers and lakes landscape, is conducive to river
The lake ecological balance, and the river and lake silt of the big scale of construction can be dissolved；Sludge solidification can dissolve the solid waste material on city and periphery simultaneously, such as
The materials such as miberal powder, flyash and waste foam realize the resource utilization of these wastes.
Summary of the invention
The present invention provides a kind of utilization mud hydraulic reclamation landscape island lightweight basement process key technology.Artificial scape in the prior art
See island ground fill earthwork it is huge, it is at high cost, easily lead to secondary environmental pollution and man-made island fastness is poor, in city
The technical problems such as heart river and lake silt outlet.
The present invention provides a kind of utilization mud hydraulic reclamation landscape island lightweight basement process key technology, solves scape in the prior art
It sees island and fills that earthwork is huge, at high cost easily leads to secondary environmental pollution and the poor technical problem of landscape island fastness.
In order to solve the above technical problems, utilizing mud hydraulic reclamation landscape island lightweight basement process key the present invention provides a kind of
Technology, comprising:
Plan boundary line along landscape island ground sets steel sheet-pile cofferdam；River and lake dredging is executed, river and lake silt is obtained；To dredge
It dredges and adds curing agent and bonding packing material formation utilizing solidified earth from sludge in mud；By treated, utilizing solidified earth from sludge is backfilling into cofferdam
It inside paves and carries out compaction in layers；Detection is sampled to soil sample after maintenance to regulation age, completes mud after reaching design objective
Curing process forms landscape island high-strength light ground.
Further, the compaction in layers processing includes: and carries out compacting rolling speed using flat stone roller to be no more than 2km/h, point
250~300mm of thickness degree, every lamination are 6~8 times real.
Further, the method also includes: before island is built in execution, to river and lake silt carry out multi-point sampling reconnoitre,
River and lake silt mechanics index of physics is measured, determines amount of sludge and applicable dredging technique；According to dredging silt amount and river and lake week
Surrounding environment designs landscape island area of base and shape；Wherein, mechanics index of physics includes moisture content, the content of organic matter, pollutant
Characteristic, liquid limit, plastic limit and granulometric composition.
Further, the curing agent and bonding packing material include: miberal powder, flyash, polystyrene foam plastics
(EPS) or waste foam, alkyl phenol polyoxyethylene ether and neopelex.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
The mud hydraulic reclamation landscape island lightweight basement process key technology provided in the embodiment of the present application is by desilting site
When handle dredging silt, remove land hydraulic reclamation from and occupy large amount of land resources, transport outward a large amount of dredging silts to sufficiently reduce and build
Build material troublesome operation and high cost problem；Importantly, the river and lake silt used on the spot and locating river and lake ecological environment
Suit completely, to guarantee the ecological environment of landscape island ground and the compatibility of river and lake ecological environment, avoids dystrophication；It is another
Aspect can also have the function that clear up river and lake silt, have positive effect for river and lake dredging；Most of all, dredging silt
Lightweight ground can reduce the additional stress of ground, the settlement issues after reducing work.
Specific embodiment
The embodiment of the present application solves existing skill by providing a kind of mud hydraulic reclamation landscape island lightweight basement process key technology
In art landscape island ground constructing soil earthwork it is huge, it is at high cost, easily lead to secondary environmental pollution and landscape island ground fastness
The technical problems such as poor and down town river and lake silt outlet；The environment compatibility, reliable for promoting landscape island ground is reached
The technical effect of property and economy.
In order to solve the above technical problems, the general thought that the embodiment of the present application provides technical solution is as follows:
Use the primary mud of river and lake for material build landscape island ground, reduce outward transport building materials, thus reduce by bring
A series of problems, such as at high cost, pollution weighs；Meanwhile, it is capable to which the adaptability natural to river and lake based on river and lake silt building materials, guarantees life
The uniformity of state system；In addition, utilizing solidified earth from sludge as base construction material basically, has the advantages that antiscour, erosion resistant, make
It obtains landscape island ground and has better structural reliability.
In order to better understand the above technical scheme, below in conjunction with specification specific embodiment to above-mentioned technical side
Case is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to technical scheme
Detailed description, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application and implementation
Technical characteristic in example can be combined with each other.
A kind of mud hydraulic reclamation landscape island lightweight basement process key technology, comprising:
Plan boundary line along landscape island ground sets steel sheet-pile cofferdam, when constructing steel sheet-pile cofferdam, cofferdam top surface ratio
The peak level that construction period is likely to occur is higher by 0.5m or more.Steel sheet pile adds one of folder every 4~5m using group stake inserting piling
Plate, clamping plate are clipped before sheet pile lifting, are removed by paying when inserting piling, are used in turn.Butter mixture is coated in the fore shaft of group stake
Ointment, to reduce frictional resistance when inserting piling and reinforce barrier performance.Steel sheet-pile cofferdam need to use the lumps of wood or fashioned iron as interior nose girder, lead
Inclosure is made in frame.Inside and outside nose girder spacing is 8cm~10cm bigger than steel sheet pile effective thickness, with the inserting piling of sharp steel sheet pile.Execute hydraulic reclamation
Before ground, multi-point sampling is carried out to river and lake silt and is reconnoitred, river and lake silt mechanics index of physics is measured, amount of sludge is determined and fits
Dredging technique is constructed to targetedly understand the state of river and lake silt convenient for subsequent design.According to dredging silt amount
Landscape island area of base and shape are designed with river and lake surrounding enviroment.Wherein, mechanics index of physics includes: that moisture content, organic matter contain
Amount, pollutant characteristic, liquid limit, plastic limit and granulometric composition.After completing above-mentioned survey and design, start to construct according to design
Cofferdam prepares dredging operation, to obtain necessary ground hydraulic reclamation material.By river and lake dredging, a large amount of river and lake can be obtained and become silted up
Mud material provides sufficient hydraulic reclamation material, while also can play positive effect to river and lake dredging.
Further, curing agent is added into gained dredging silt and bonding packing material forms utilizing solidified earth from sludge.
It further, will treated that utilizing solidified earth from sludge is backfilling into cofferdam to pave carries out compaction in layers.Specifically, it adopts
It being compacted with flat stone roller, rolling speed is no more than 2km/h, lift height 250~300mm, and every lamination reality 6~8 times.Meanwhile by
It is significant to the adaptability and erosion resistance of river-lake environment in filler itself from river-lake environment herein.
Further, detection is sampled to soil sample after maintenance to regulation age, completion mud is solid after reaching design objective
Change processing, forms landscape island high-strength light ground.
Further, the curing agent and bonding packing material include: miberal powder, flyash, polystyrene foam plastics
(EPS) or waste foam, alkyl phenol polyoxyethylene ether and neopelex.The curing agent and bonding packing material have
Following technical effect: the mechanical strength and stability of curing sludge can be improved in hydration reaction product；Miberal powder and fine coal is utilized
Grey two kinds of industrial residues, reduce processing cost, alleviate environmental pressure；Addition foamed plastics or waste foam can reduce cost
And environment is protected, while making landscape island ground that there is lightweight nature；Add nonionic surfactant and anion surface active
Agent plays the role of blistering and foam stabilizing, and has stronger caking property, can make dredging silt rapid curing, shorten the construction period.
The present embodiment also passes through one and specifically makes island scheme and illustrate the present invention below.
With tubular type sludge sampler, multi-point sampling is reconnoitred in certain lake, and measuring bottom sludge layer average thickness is
0.8m, area of lake 60000m2, current depth of water 1.8m, test result is as follows for laboratory test: gravel content 8% (Zhan Ganchong),
The content of organic matter 5% (Zhan Ganchong), natural density 1.2t/m3, clay content 65%, contamination-free, final determine inhaled using twisting
Dredging is 60000m to dredging silt amount3；At lake center, round Eco-Island ground, diameter 45m are filled in design；Along design
Boundary line sets steel sheet-pile cofferdam outside landscape island ground；Mud in cofferdam twist comprehensively and inhales dredging, dredging mud is delivered to
Sludge treatment place adds 40kg modifying agent (miberal powder: flyash: alkyl phenol polyoxyethylene ether: 12 into dredging silt per ton
Sodium alkyl benzene sulfonate=4: 4: 1: 1), while adding 500g polystyrene foam plastics (EPS) and forming utilizing solidified earth from sludge；It will processing
Utilizing solidified earth from sludge afterwards, which is backfilling into cofferdam, to be paved and is compacted using flat stone roller, rolling speed 2km/h, lift height
250mm, every lamination are 8 times real；Maintenance usually 28 days, is sampled detection to soil sample, after reaching design objective to regulation age
Sludge solidification processing is completed, cofferdam is removed, forms landscape island high-strength light ground.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
What is provided in the embodiment of the present application utilizes mud hydraulic reclamation landscape island lightweight basement process key technology, is adopted by scene
Collect riverbed sludge, and build island material by being fabricated to the original of landscape island ground to dredging silt progress curing process, to fill
Dividing reduces troublesome operation and the high cost problem for transporting outward a large amount of dredging silts and construction material；Importantly, use on the spot
River and lake silt suits completely with locating river and lake ecological environment, to guarantee the simultaneous of the ecological environment of landscape island and river and lake ecological environment
Capacitive avoids dystrophication；On the other hand, it can also have the function that clear up river and lake silt, have positive meaning for river and lake dredging
Justice；Simultaneously by using treated utilizing solidified earth from sludge as the island base of landscape island, and to utilizing solidified earth from sludge progress compaction in layers
Processing, enhances the overall stability of landscape island ground.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (4)
1. mud hydraulic reclamation landscape island lightweight basement process key technology characterized by comprising
Plan boundary line along landscape island ground sets steel sheet-pile cofferdam；River and lake dredging is executed, river and lake silt is obtained；
Curing agent is added into dredging silt and bonding packing material forms utilizing solidified earth from sludge；By treated, utilizing solidified earth from sludge is returned
It fills out to pave into cofferdam and carries out compaction in layers；Detection is sampled to soil sample after maintenance to regulation age, after reaching design objective
Sludge solidification processing is completed, landscape island high-strength light ground is formed.
2. mud hydraulic reclamation landscape island lightweight basement process key technology as described in claim 1, which is characterized in that the layering
Compaction treatment includes: to be compacted using flat stone roller, and rolling speed is no more than 2km/h, and 250~300mm of lift height, every lamination is in fact
6~8 times.
3. mud hydraulic reclamation landscape island lightweight basement process key technology as described in claim 1, it is characterised in that: the method
Further include: before executing ground and building, multi-point sampling is carried out to river and lake silt and is reconnoitred, measurement river and lake silt physical mechanics refer to
Mark determines amount of sludge and applicable dredging technique；According to dredging silt amount and river and lake surrounding enviroment design landscape island basal plane
Long-pending and shape；Wherein, mechanics index of physics includes: moisture content, the content of organic matter, pollutant characteristic, liquid limit, plastic limit and granularity
Ingredient.
4. mud hydraulic reclamation landscape island lightweight basement process key technology as described in claim 1, it is characterised in that: the solidification
Agent and bonding packing material include: miberal powder, flyash, polystyrene foam plastics (EPS) or waste foam, alkyl phenol polyoxy second
Alkene ether and neopelex.
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| CN201910159185.3A CN109914345A (en) | 2019-03-03 | 2019-03-03 | Mud hydraulic reclamation landscape island lightweight basement process key technology |
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| CN201910159185.3A CN109914345A (en) | 2019-03-03 | 2019-03-03 | Mud hydraulic reclamation landscape island lightweight basement process key technology |
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Cited By (2)
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| CN110230318A (en) * | 2019-06-25 | 2019-09-13 | 中交上海航道勘察设计研究院有限公司 | Raft foundation structure for the construction of lake region man-made island |
| CN115231779A (en) * | 2022-08-04 | 2022-10-25 | 中国科学院亚热带农业生态研究所 | Silting type lake ecological restoration method |
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| CN107267121A (en) * | 2017-08-10 | 2017-10-20 | 北京中永基固化剂科技发展有限公司 | A kind of processing method of dust suppression sludge curing agent |
| CN107313422A (en) * | 2017-07-11 | 2017-11-03 | 江苏坤泽科技股份有限公司 | A kind of method that road/place basis is prepared under muddy soft soil environment |
| CN108468325A (en) * | 2018-03-23 | 2018-08-31 | 葛洲坝中固科技股份有限公司 | A kind of large area borders on the sea beach ooze rapid curing construction method |
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Patent Citations (4)
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| CN106906812A (en) * | 2017-03-17 | 2017-06-30 | 中国科学院武汉岩土力学研究所 | A kind of method that utilization river and lake silt builds artificial ecologic island |
| CN107313422A (en) * | 2017-07-11 | 2017-11-03 | 江苏坤泽科技股份有限公司 | A kind of method that road/place basis is prepared under muddy soft soil environment |
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| CN115231779A (en) * | 2022-08-04 | 2022-10-25 | 中国科学院亚热带农业生态研究所 | Silting type lake ecological restoration method |
| CN115231779B (en) * | 2022-08-04 | 2024-05-10 | 中国科学院亚热带农业生态研究所 | Ecological restoration method for siltation type lake |
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Application publication date: 20190621 |
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