CN109706914A - It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards - Google Patents
It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards Download PDFInfo
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- CN109706914A CN109706914A CN201910051984.9A CN201910051984A CN109706914A CN 109706914 A CN109706914 A CN 109706914A CN 201910051984 A CN201910051984 A CN 201910051984A CN 109706914 A CN109706914 A CN 109706914A
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- hydraulic reclamation
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- drainage
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Abstract
The invention discloses a kind of blast-filled ground method for processing foundation for being layered and draining downwards, water outlet is arranged in cofferdam bottom, and drainage path is that from top to bottom, gravity can be made full use of to drain；The drainage channel of this method is three-dimensional setting, and vertical drainage channel is set before dredge fill, and transverse drainage channel is gradually laid with construction, and while dredge fill, drainage channel starts to play its drainage；Any drainage channel is not set in this method in the last layer barged-in fill, the last layer barged-in fill guarantees the effect of vacuum drainage as vapour barrier.It is not necessarily to stand after the completion of this method hydraulic reclamation, start to drain while construction, fundamentally solve the problems, such as that the blast-filled ground basement process duration long, top-down drainage path is aided with three-dimensional drainage channel while drainage efficiency is greatly improved, solid fraction in barged-in fill be able under the double action of gravity and waterpower sufficiently it is closely knit, can effectively reduce settlement after construction.
Description
Technical field
The invention belongs to Geotechnical Engineering fields.It is related to a kind of method for processing foundation, and in particular to a kind of layering is downward
The blast-filled ground method for processing foundation of draining.
Background technique
The general step of reclamation by pumping filling at present is that cofferdam → hydraulic reclamation → basement process → uses with making.In the process of reclaiming fields from the sea
In, it is basement process to duration and the biggish link of economic impact, this link also determines the use function energy for making the ground later period
It is no to meet the requirements.Since hydraulic reclamation is carried out frequently with waterpower, water content of soil is high in entire place after hydraulic reclamation, low bearing capacity, the soil body
Mostly in fluidised form, stream modeling, construction personnel, equipment be cannot be introduced into, and the place for causing hydraulic reclamation to be formed can not come into operation immediately generates warp
Ji value.Conventional way is to dry even several years draining several months, then use and be laid with bamboo raft, chaste tree fragrant plant, geotextile etc. at present
Material makes the soil body have certain bearing capacity, so that construction personnel is able to enter operation, then with the superficials layer such as shallow-layer vacuum preloading
Base preprocess method carries out single treatment, and heavy mechanical equipment is made to be able to enter operation, then pre- using deep vacuum precompressed, preloading
The methods of pressure or dynamic water-drainage consolidation carry out secondary treatment, and blast-filled ground reaches the condition for having and using.It is completed from place hydraulic reclamation
It can come into operation to place and generally require waiting 1 year or more even several years, it is also necessary to put into huge fund and carry out at ground
Reason can make place be delivered for use.Therefore, it is badly in need of developing a kind of construction method that barged-in fill is rapidly solidified, makes blowing-filling sludge can be with
It is rapidly solidified in a short time, reach higher bearing capacity, and effectively reduce settlement after construction.
Summary of the invention
The object of the present invention is to provide a kind of blast-filled ground method for processing foundation for being layered and draining downwards, to solve existing skill
The technical problems such as the deficiency that reclaimed ground processing technique is long in time limit present in art, effect is low.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme:
It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards, it will be no less than 1m's under the designed elevation of hydraulic reclamation mud face
Hydraulic reclamation mud body and mud face the exudation water layer in the range of any drainage channel are not provided with as vapour barrier to guarantee vacuum drainage effect
Fruit is used as drainage channel by plastic draining board (3) vertical and being laterally arranged, and makes full use of gravity, in cofferdam (2)
Exterior bottom is drained downwards using vacuum machine (7).
It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards, comprising the following steps:
A.. construction pretreatment: region to be treated is carried out according to the requirement in " building foundation treatment technical specification "
Surveying setting-out determines processing area, flattens place and is laid with the sand bedding course for being no less than 50cm；
The sand bedding course should divide two layers of laying, and first layer backfilling thickness should be not less than 20cm, and the second layer should be vertical in step D
Plastic draining board is capable again after plugging to be filled.
B. it fills cofferdam: being laid with the sand bedding course of 5~10m wide, weir every 5~10m in cofferdam bottom along cofferdam length direction
Bed load bed course is filled to concordant with the sand bedding course in place, and cofferdam is filled to designed elevation；
Cofferdam design and filling construction should meet current specifications " dredging and Dredger Filling Engineering design specification " JTS 181 and " blow
Filled up ground processing technique specification " GB/T 51064 related request
C. it is laid with charge for remittance layer of sand: filling the charge for remittance layer of sand of 30~50cm, charge for remittance layer of sand top mark Gao Bugao in the cofferdam side Ying Ni
Mud face absolute altitude is designed in hydraulic reclamation, and charge for remittance layer of sand top mark rise hydraulic reclamation mud face designed elevation is not less than 100cm；
D., vertical drainage channel is set: plastic draining board and moso bamboo being bound, according to determining plastic draining board number
Amount and spacing plug the moso bamboo for tying up plastic draining board into sand bedding course；
The moso bamboo should penetrate sand bedding course and in depth under at least 1m；
The vertical plastic draining board lower end should go deep into sand bedding course and be no less than 30cm, and vertical plastic draining board bottom end should have not
Transverse direction bending less than 50cm, bending part are laid between two layers of sand bedding course described in step A, overbending direction direction draining side
To；
Further, vertical plastic draining board is triangularly arranged or square arrangement, between each drain bar away from
From for 0.7-1.5m；
Further, moso bamboo and vertical plastic draining board top should not exceed hydraulic reclamation mud face designed elevation, and moso bamboo and perpendicular
It is no less than 100cm away from hydraulic reclamation mud face designed elevation to plastic draining board top, in order to form vapour barrier；
E. hydraulic reclamation and transverse drainage channel is arranged: dredge fill layering carries out, and every layer of hydraulic reclamation terminates i.e. in current hydraulic reclamation mud
Face is laterally laid with plastic draining board as transverse drainage channel, repeats this process up to hydraulic reclamation to designed elevation；
Every layer of hydraulic reclamation thickness is preferably 1~2m, and the too big then drainage effect of every layer of hydraulic reclamation thickness is bad, and thickness is too small, makes
At the waste of drain bar；
The transverse direction plastic draining board should be laid with by its cross sectional moment of inertia compared with general orientation, guarantee its anti-bending strength and row with this
Aqueous energy；
Further, lateral plastic draining board end should be inserted into the charge for remittance layer of sand of the cofferdam side Ying Ni；
Further, lateral plastic draining board horizontal space 0.7-1.5m；
Further, layer hydraulic reclamation is finished should check hanging down for vertical plastic draining board while installing lateral plastic draining board
It is straight to spend and rectify a deviation in time.
F. it vacuumizes draining: being laid with sealing film at the back mud side bottom sand bedding course of cofferdam, using vacuum machine and carry out
Vacuum drainage operation.
The sealing film seals film using polyethylene or polyvinyl chloride, and the technical indicator and performance for sealing film should meet " true
Empty preloading method reinforcing soft ground construction technology regulation " HGT 20578-2013 relevant regulations；
It is described to vacuumize operation and may be selected to start after hydraulic reclamation to designed elevation to carry out or with dredge fill while carry out；
Further, it is to accelerate discharging consolidation, after blast-filled ground reaches some strength, can be rolled by static(al) or power
Roll further assisted drainage.
Compared with prior art, there are following advantages for the method for the present invention:
This method passes through plastic draining board vertical and being laterally arranged as drainage channel, and makes full use of gravity,
In cofferdam, exterior bottom is drained downwards using vacuum machine, can effectively accelerate blast-filled ground soil solidifying.
(1) short time limit: being arranged drainage channel while dredge fill, is compared to traditional blast-filled ground basement process
Method, this method are stood without prolonged, can be immediately begun to draining after ability while dredge fill or after hydraulic reclamation is complete and be made
Industry substantially reduces the duration.
(2) drainage efficiency is high, low energy consumption: being compared to traditional blast-filled ground method for processing foundation (vacuum method or preloading
Method) plug one-dimensional vertical drainage channel downwards from earth's surface after standing, then drain outward from bottom to top, it is horizontal in this method
It erects staggered drain bar and forms three-dimensional drainage channel, substantially increase drainage efficiency, while vacuum machine is arranged on cofferdam back
The bottom of mud side, drainage direction are from top to bottom, to make full use of gravity, can effectively reduce while improving drainage efficiency
Energy consumption.
(3) settlement after construction is small: top-down drainage pattern makes the solid fraction in barged-in fill in pair of gravity and waterpower
Recast is more closely knit under using, and can effectively reduce settlement after construction.
Detailed description of the invention
Fig. 1 is the blast-filled ground method for processing foundation schematic diagram that layering of the invention drains downwards
Fig. 2 is the Section A-A view of Fig. 1.
It is numbered in figure: 1- sand bedding course；The cofferdam 2-；3- charge for remittance layer of sand；4- moso bamboo；5- vapour barrier；6- seals film；7- vacuum
Machine；8- charge for remittance layer of sand.
Specific embodiment
The blast-filled ground method for processing foundation that a kind of layering of the present invention drains downwards, by hydraulic reclamation mud face designed elevation
Be no less than down 1m the hydraulic reclamation mud body being not provided in the range of any drainage channel and mud face exudation water layer as vapour barrier to protect
Vacuum drainage effect is demonstrate,proved, drainage channel is used as by plastic draining board (3) vertical and being laterally arranged, and gravity is made full use of to make
With in cofferdam, (2) exterior bottom is drained downwards using vacuum machine (7).
The present invention the following steps are included:
A.. construction pretreatment: region to be treated is carried out according to the requirement in " building foundation treatment technical specification "
Surveying setting-out determines processing area, flattens place and is laid with the sand bedding course for being no less than 50cm；
The sand bedding course should divide two layers of laying, and first layer backfilling thickness should be not less than 20cm, and the second layer should be vertical in step D
Plastic draining board is capable again after plugging to be filled.
B. it fills cofferdam: being laid with the sand bedding course of 5~10m wide, weir every 5~10m in cofferdam bottom along cofferdam length direction
Bed load bed course is filled to concordant with the sand bedding course in place, and cofferdam is filled to designed elevation；
Cofferdam design and filling construction should meet current specifications " dredging and Dredger Filling Engineering design specification " JTS 181 and " blow
Filled up ground processing technique specification " GB/T 51064 related request
C. it is laid with charge for remittance layer of sand: filling the charge for remittance layer of sand of 30~50cm, charge for remittance layer of sand top mark Gao Bugao in the cofferdam side Ying Ni
Mud face absolute altitude is designed in hydraulic reclamation, and charge for remittance layer of sand top mark rise hydraulic reclamation mud face designed elevation is not less than 100cm；
D., vertical drainage channel is set: plastic draining board and moso bamboo being bound, according to determining plastic draining board number
Amount and spacing plug the moso bamboo for tying up plastic draining board into sand bedding course；
The moso bamboo should penetrate sand bedding course and in depth under at least 1m；
The vertical plastic draining board lower end should go deep into sand bedding course and be no less than 30cm, and vertical plastic draining board bottom end should have not
Transverse direction bending less than 50cm, bending part are laid between two layers of sand bedding course described in step A, overbending direction direction draining side
To；
Further, vertical plastic draining board is triangularly arranged or square arrangement, between each drain bar away from
From for 0.7-1.5m；
Further, moso bamboo and vertical plastic draining board top should not exceed hydraulic reclamation mud face designed elevation, and moso bamboo and perpendicular
It is no less than 100cm away from hydraulic reclamation mud face designed elevation to plastic draining board top, in order to form vapour barrier；
E. hydraulic reclamation and transverse drainage channel is arranged: dredge fill layering carries out, and every layer of hydraulic reclamation terminates i.e. in current hydraulic reclamation mud
Face is laterally laid with plastic draining board as transverse drainage channel, repeats this process up to hydraulic reclamation to designed elevation；
Every layer of hydraulic reclamation thickness is preferably 1~2m, and the too big then drainage effect of every layer of hydraulic reclamation thickness is bad, and thickness is too small, makes
At the waste of drain bar；
The transverse direction plastic draining board should be laid with by its cross sectional moment of inertia compared with general orientation, guarantee its anti-bending strength and row with this
Aqueous energy；
Further, lateral plastic draining board end should be inserted into the charge for remittance layer of sand of the cofferdam side Ying Ni；
Further, lateral plastic draining board horizontal space 0.7-1.5m；
Further, layer hydraulic reclamation is finished should check hanging down for vertical plastic draining board while installing lateral plastic draining board
It is straight to spend and rectify a deviation in time.
F. it vacuumizes draining: being laid with sealing film at the back mud side bottom sand bedding course of cofferdam, using vacuum machine and carry out
Vacuum drainage operation.
The sealing film seals film using polyethylene or polyvinyl chloride, and the technical indicator and performance for sealing film should meet " true
Empty preloading method reinforcing soft ground construction technology regulation " HGT 20578-2013 relevant regulations；
It is described to vacuumize operation and may be selected to start after hydraulic reclamation to designed elevation to carry out or with dredge fill while carry out；
Further, it is to accelerate discharging consolidation, after blast-filled ground reaches some strength, can be rolled by static(al) or power
Roll further assisted drainage.
Technical solution of the present invention is described further with reference to the accompanying drawing, but the present invention is not limited in being described below
Hold:
Referring to this method schematic diagram shown in Fig. 1,2, first by region to be treated according to " building foundation treatment technology
Specification " requirement in (JGJ 79-2012) measures unwrapping wire, determine processing area, leveling place, which is simultaneously laid with, is no less than 50cm
Sand bedding course (1), which need to divide two layers of laying, and first layer laying depth is not less than 20cm, and the second layer need to moulded vertically
Material drain bar (3) is laid with after the completion of plugging；It fills later cofferdam structure (2), cofferdam bottom is laid with 5~10m wide every 5~10m
Sand bedding course, in this, as the outlet of water in barged-in fill, thickness is consistent with sand bedding course in place；Fill completion in cofferdam
Afterwards, the charge for remittance layer of sand (8) of 30~50cm is filled in the cofferdam side Ying Ni, charge for remittance layer of sand (8) top mark height designs mud face not higher than hydraulic reclamation
Absolute altitude need to guarantee charge for remittance layer of sand (8) top mark rise hydraulic reclamation mud face designed elevation not less than 100cm；Vertical drainage in this method
Channel is set before dredge fill, for the verticality for guaranteeing vertical plastic draining board (3), by plastic draining board (3) and moso bamboo
(4) it is bound, to guarantee that vertical plastic draining board (3) will not be subjected to displacement, moso bamboo (4) should penetrate sand bedding course (1) and go deep into
Underground at least 1m；To guarantee drainage effect, plastic draining board (3) lower end should have the lateral bending of no less than 50cm, overbending direction
Towards drainage direction；It plugs and finishes to vertical plastic draining board (3), be laid with the second layer of sand bedding course (1), bending part is made to tile
Between sand bedding course (1), sand bedding course thickness need to be guaranteed not less than 50cm；So far it can start dredge fill, dredge fill should divide
Layer carries out, and to guarantee that drainage effect does not cause the waste of drain bar, every layer of hydraulic reclamation thickness is preferably controlled in 1~2m；Every layer of hydraulic reclamation
After in time mud face be laid with plastic draining board (3) be used as transverse drainage channel, for guarantee plastic draining board (3) anti-bending strength
And drainage performance, the transverse direction plastic draining board (3) should be laid with by its cross sectional moment of inertia compared with general orientation, as shown in Figure 2；At every layer
Transverse drainage channel should check the verticality of vertical plastic draining board (3) after being provided with, and rectify a deviation in time；Repeat hydraulic reclamation-paving
If lateral plastic draining board (3) operates until designed elevation, need to guarantee that most thick one layer of hydraulic reclamation thickness is not less than 1m, and with last
Layer barged-in fill guarantees subsequent vacuum drainage effect as vapour barrier (6)；Mud side bottom sand pad is being carried on the back in cofferdam after hydraulic reclamation is complete
It is laid with sealing film (6) at layer, and carries out operation of drawing water by vacuum machine (7).Sealing film (6) also can fill process middle berth in cofferdam
If vacuum is drawn water, operation can also start when hydraulic reclamation operation starts or in the process.
Examples detailed above is technical conception and technical characteristics to illustrate the invention, can not be limited with this of the invention
Protection scope.The equivalent transformation or modification that all essence according to the present invention is done, should all cover in protection scope of the present invention
Within.
Claims (6)
1. a kind of be layered the blast-filled ground method for processing foundation drained downwards, which is characterized in that will be under the designed elevation of hydraulic reclamation mud face
The hydraulic reclamation mud body of no less than 1m being not provided in the range of any drainage channel and mud face exudation water layer are as vapour barrier to guarantee
Vacuum drainage effect is used as drainage channel by plastic draining board (3) vertical and being laterally arranged, and gravity is made full use of to make
With in cofferdam, (2) exterior bottom is drained downwards using vacuum machine (7).
2. the blast-filled ground method for processing foundation that a kind of layering according to claim 1 drains downwards, comprising the following steps:
A. construction pretreatment: region to be treated is measured according to the requirement in " building foundation treatment technical specification " and is put
Line determines processing area, flattens place and is laid with the sand bedding course (1) for being no less than 50cm；
B. it fills cofferdam: being laid with the sand bedding course of 5~10m wide, weir bed load every 5~10m in cofferdam bottom along cofferdam length direction
Bed course is filled to concordant with the sand bedding course in place, and cofferdam is filled to designed elevation；
C. it is laid with charge for remittance layer of sand: filling the charge for remittance layer of sand (8) of 30~50cm in the cofferdam side Ying Ni, charge for remittance layer of sand top mark height is not higher than
Hydraulic reclamation designs mud face absolute altitude, and charge for remittance layer of sand top mark rise hydraulic reclamation mud face designed elevation is not less than 100cm；
D., vertical drainage channel is set: plastic draining board (3) and moso bamboo (4) being bound, according to determining plastic draining board
(3) quantity and spacing plug the moso bamboo (4) for tying up plastic draining board (3) into sand bedding course (1), as vertical drainage channel；
E. hydraulic reclamation and transverse drainage channel is arranged: dredge fill layering carries out, and every layer of hydraulic reclamation terminates i.e. in current hydraulic reclamation mud face cross
It is used as transverse drainage channel to plastic draining board (3) are laid with, repeats this process up to hydraulic reclamation to designed elevation；
F. it vacuumizes draining: being laid with sealing film (6) at the back mud side bottom sand bedding course of cofferdam, gone forward side by side using vacuum machine (7)
Row vacuum drainage operation.
3. the blast-filled ground method for processing foundation that a kind of layering according to claim 2 drains downwards, which is characterized in that step
Sand bedding course (1) described in rapid A should divide two layers of laying, and first layer backfilling thickness should be not less than 20cm, and the second layer should vertically be arranged in step D
Water body is capable again after plugging to be filled, its thickness is not less than 50cm after the completion of sand bedding course (1) is laid with；Plastic draining board in step D
(3) bottom end should have the lateral bending of no less than 50cm, and bending part is laid between two layers of sand bedding course described in step A, bending side
To towards drainage direction.
4. the blast-filled ground method for processing foundation that a kind of layering according to claim 2 drains downwards, which is characterized in that step
Moso bamboo (4) described in rapid D should penetrate sand bedding course (1) and in depth under at least 1m, plastic draining board (3) lower end should go deep into sand bedding course not
Less than 30cm, moso bamboo (4) and vertical plastic draining board (3) top should not exceed hydraulic reclamation mud face designed elevation, and moso bamboo (4) and modeling
Expect that drain bar (3) top is no less than 100cm away from hydraulic reclamation mud face designed elevation, in order to form vapour barrier (5), the plastic draining
Plate (3) is triangularly arranged or square arrangement, and the distance between each plastic draining board (3) is 0.7-1.5m.
5. the blast-filled ground method for processing foundation that a kind of layering according to claim 2 drains downwards, which is characterized in that step
Layering dredge fill described in rapid E, every layer of hydraulic reclamation thickness is preferably 1~2m, and lateral plastic draining board (3) should be by its section inertia
Square is laid with compared with general orientation, and charge for remittance layer of sand (3) are inserted into its end, lateral plastic draining board (3) horizontal space 0.7-1.5m；Often
Layer hydraulic reclamation finishes the verticality that vertical plastic draining board (3) should be checked while installing lateral plastic draining board (3) and timely
Correction.
6. according to the method described in claim 2, it is characterized in that, sealing film (6) described in step F uses polyethylene or polychlorostyrene second
Alkene seals film, and the technical indicator and performance for sealing film should meet " Vacuum Preloading Method for Consolidation of Soft Soil Foundation construction technology regulation " HGT
The relevant regulations of 20578-2013；Operation is vacuumized described in step F may be selected progress or same hydraulic reclamation after hydraulic reclamation to designed elevation
It constructs while carrying out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910051984.9A CN109706914A (en) | 2019-01-21 | 2019-01-21 | It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards |
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|---|---|---|---|
| CN201910051984.9A CN109706914A (en) | 2019-01-21 | 2019-01-21 | It is a kind of to be layered the blast-filled ground method for processing foundation drained downwards |
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| CN111305186A (en) * | 2020-02-20 | 2020-06-19 | 浙江省疏浚工程有限公司 | Double-layer vacuum preloading soft soil foundation reinforcing structure |
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| CN110294584A (en) * | 2019-07-23 | 2019-10-01 | 中交上海航道勘察设计研究院有限公司 | A kind of device and method that mud dystopy is reinforced using self weight consolidation |
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