CN105002883B - Soft foundation is classified relay-type draining concretion method indirectly - Google Patents
Soft foundation is classified relay-type draining concretion method indirectly Download PDFInfo
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Abstract
The present invention relates to a kind of soft foundation to be classified relay-type draining concretion method indirectly, it reclaims fields from the sea the soft foundation to be formed mainly for including bottom saturation stickiness soil layer and top hydraulic reclamation soil layer, by below the barged-in fill earth's surface 1.5m of top, level conversion layer is formed in the saturation stickiness soil layer top surface above depth bounds of bottom, in bottom, saturation stickiness soil layer sets static(al) drainage channel, on top, hydraulic reclamation soil layer sets dynamic drainage passage, after underground water in the soil layer of bottom drains into level conversion layer, soft foundation is discharged through dynamic drainage passage and is realized under strong rammer dynamic action rapidly solidified.The method is organically combined shallow-layer initiative light well point pump drainage and deep plastic plate passivity draining by building level conversion layer, and soft foundation is carried out to accelerate high efficiency composition draining.Short with the construction period, it is big to reinforce influence depth, the advantages of high treating effect.Can be widely applied to reclaim fields from the sea the reinforcing of the soft foundation to be formed.
Description
Technical field
The present invention relates to a kind of method for processing foundation, more particularly to a kind of draining for the soft foundation to be formed of reclaiming fields from the sea
Consolidation processing methods.
Background technology
The large-area soft foundation that hydraulic reclamation is formed recently of reclaiming fields from the sea generally there are bottom and (be become silted up for original state saturation stickiness soil layer
Mud and muck soil) and top landfill, throwing or hydraulic reclamation soil layer recently typical case " binary " earth formation feature；This " binary "
The soft foundation of Rotating fields typically has high-compressibility, high-moisture, high sensitivity, " three high and one low " feature of low bearing capacity,
Serious liquefaction performance often also be present in top hydraulic reclamation soil layer.
Being distinguished for soft foundation comprehensive treatment technique method of reclaiming fields from the sea from technical thought and reinforcement mechanism mainly has
Two major classes, one kind are draining static(al) concretion method, such as piling prepressing, vacuum preloading, vacuum and Surcharge Preloading Method；It is another kind of
It is drainage power concretion method, such as High vacuum compacting method, Yield rainfall relation heavy-tamping method, light well plastic strip method for strengthening.Its core be unable to do without " row
Water " and " consolidation ", " draining " are conditions, are measure；" consolidation " is purpose, is result.It is right in the case where duration time allows
The processing of saturation cohesive soil (mud, muck soil) soft foundation should preferentially use draining static(al) consolidation method.From current skill
From the point of view of art present situation, traditional precipitation combination heavy-tamping method is undoubtedly for the dynamic consolidation mode of representative and meets increasingly efficient development ＆ construction
Speed is preferably selected, actually due to single precipitation method combination heavy-tamping method, because of its different applicability defect of geological conditions again
Development and the application prospect of dynamic consolidation method are govern to a certain extent.
In terms of current technology present situation and applicable cases, the processing for large-area soft foundation of reclaiming fields from the sea, with strong rammer
For the relative construction is simple of drainage power concretion method of representative, process cycle is short, and cost is more cheap, such as arranges light well point vacuum
Water hits the close High vacuum compacting method being combined with strong rammer, by being carried out to soft soil foundation at multipass time alternating Yield rainfall relation and strong rammer
Reason, is greatly improved ground top layer soil body compaction rate, place top layer is formed certain thickness crust layer, significantly improve ground
Stress performance.But due to the restriction (be generally less than 6m) of light well point length of tube, under such method is particularly below for 6m
The reinforcing of sleeping saturation cohesive soil (mud, muck soil) layer does not almost have effect；Such as vacuum preloading, vacuum and preloading joint preloading
Method etc., for the obvious draining static(al) concretion method of saturation cohesive soil (mud, muck soil) consolidation effect again because its complex process,
Process cycle is longer, bearing power increase limited extent, and cost is higher to be used by certain restriction.Due to the need of capital construction
Will, often require that in the range of soft foundation certain depth of reclaiming fields from the sea soft layer (hydraulic reclamation layer and certain thickness mud,
Silt soil strata) consolidation process is carried out, improve its Physical and mechanical properties, so as to meet superstructure to foundation bearing capacity, sedimentation
Deformation or even the requirement of stability.To improve the reinforcing influence depth of drainage power consolidation method, technical staff's trial uses can
With set deeper pipe well, even vacuum tube well (increasing pump drainage dynamics) combine the technique of strong rammer to carry out place drop row
Water, it is intended that increase dynamic consolidation effective reinforcing depth, engineering test and practice have shown that, although place drawdown has increased
Add, up to 6m or so, but to the improvement still unobvious of below 6m soft soil layers (mud, muck soil) mechanical property, it is former to study carefully it
Cause, is soft soil layer infiltration coefficient very little, under the conditions of strong rammer Super-void Water Pressure can not rapid dispersion, effective stress can not increase or
Caused by change less.Effectively to reinforce deep saturation stickiness soil layer, such as " soft foundation light well point combination plastic draining board is compound
Reinforcement means ", this method technical characterstic are by the conventional vertical drainage passage plastic draining board of saturation cohesive soil processing and light-duty well
The light well plastic strip well point of point pipe directly being connected to form one of overlap joint, by light well plastic strip well point, by the saturation soft clay of deep
The pore water for penetrating into plastic draining board actively accelerates pump drainage to go out by light well point pipe, and deep saturation is soft under the conditions of accelerating strong rammer
The dissipation of excess pore water pressure in clay layer, so as to effectively influence and reinforce deep saturation stickiness soil layer.Its reinforcing shadow of the technology
Depth is rung still to need further to be improved up to 9m, but for the consolidation effect of deep saturation stickiness soil layer.Because by light well point
With reference to the restriction of dynamic consolidation construction technique, the density of setting spacing of the light well plastic strip well point of this method be typically only capable of reaching 2.0m ×
2.5m, and in strong rammer point in work progress, the plastic draining board for having half not yet sets or in considered repealed state (top
Well-point pipe has been pulled out), and for the infiltration coefficient and the coefficient of consolidation of general saturation cohesive soil (mud, muck soil), according to work
Journey experience and correlation theory and specification (《Vacuum preloading technical regulation》The 4.3.4 articles) require, plastic draining
The setting spacing of plate, which should generally reach 0.7~1.3m side, can obtain ideal consolidation effect, and satisfy in a specified time
It is directly related with the density of setting of plastic draining board (vertical drainage passage) with the discharging consolidation effect of Clayey Soil Ground.Thus may be used
See, light well plastic strip method for strengthening for soft foundation deep saturation stickiness soil layer of reclaiming fields from the sea consolidation effect also by very big system
About.
The content of the invention
It is an object of the invention to provide a kind of soft foundation to be classified relay-type draining concretion method indirectly, and its purpose is to overcome
The deficiency of above-mentioned Soft foundation treatment present situation engineering method of reclaiming fields from the sea, there is provided one kind, which both can be reinforced effectively, reclaims fields from the sea on soft foundation
Portion's hydraulic reclamation soil layer, but the composite, water-drain for having obvious treatment effect to deep saturation stickiness soil layer (mud, muck soil) consolidates
Method.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of soft foundation is classified relay-type draining concretion method indirectly, and the soft foundation includes bottom saturation stickiness soil layer
With top hydraulic reclamation soil layer, below the barged-in fill earth's surface 1.5m of top, set in the saturation stickiness soil layer top surface above depth bounds of bottom
Level conversion layer is put, the following soil layer of level conversion layer uses static(al) drainage channel, and level conversion layer above soil layer is arranged using power
Aquaporin, the underground water in the following soil layer of level conversion layer is drained into level conversion layer through static(al) drainage channel, then through power
Drainage channel is discharged soft foundation and realized under strong rammer dynamic action rapidly solidified.
Further, the level conversion layer is arranged on infiltration coefficient >=10-4In cm/s sandy soil layer, and in on-site
It is continuously distributed.
Specifically, the level conversion layer artificial hydraulic reclamation formation or top hydraulic reclamation soil layer before the formation of top hydraulic reclamation soil layer
Determined after formation according to bottom saturation stickiness soil layer top surface above soil layer soil condition.
Specifically, the thickness of the level conversion layer determines according to soil condition.
Preferably, thickness >=0.5m of the level conversion layer.
Further, the dynamic drainage passage is true according to ground processing requirement and the conversion layer depth of burying using technique
It is fixed.
Specifically, when the depth of burying of conversion layer is below earth's surface in the range of 6m, the technique for taking light well point；Work as conversion
The layer depth of burying is more than 6m scopes below earth's surface, then takes the techniques such as pipe well, sand drain.
Further, the static(al) drainage channel uses plastic draining board technique.
Specifically, after the plastic draining board inserts certain deep layer according to necessary requirement, top is exposed to the plastics of earth's surface
Drain bar returns the insertion soil body, and it is below earth's surface 3m to return slotting depth.Also can according to engineering situation and soil condition using sand wick,
Sand drain technique, its top should be with conversion layer either flush.
The present invention is had the characteristics that compared with the existing construction method of Soft foundation treatment of reclaiming fields from the sea and beneficial effect：
1st, can will be effective by building a level conversion layer intending a certain reasonable depth section of soft ground treatment
Deep layer sludge treatment be often indirectly connected with vertical drainage passage plastic draining board and active evacuation system (light well point pipe network)
Get up, organically combined by shallow-layer initiative light well point pump drainage and deep plastic plate passivity draining, soft foundation is carried out
Accelerate high efficiency composition draining, play respective advantage and feature；Meanwhile the engineering method is the most convenient effective using current basement process
Strong rammer technique, rapidly solidified processing is carried out to soft foundation.Due to having laid intensive erect in the saturation stickiness soil body of deep
To drainage channel, the piling prepressing system (plastic draining board+level for deep saturation cohesive soil on practical significance is constructed
Conversion layer+bright isostere the system of top hydraulic reclamation soil layer+zanjon), it can effectively promote deep saturation cohesive soil (to be blown in the quiet overburden pressure in top
Fill stratum), accelerate discharging consolidation under the collective effect of effect after dynamic load (strong rammer) and its remnants, it is notable to reinforce influence depth
Increase.Therefore, the engineering method has dynamic consolidation (strong rammer) and static(al) consolidation (piling prepressing) double-mode concurrently, is a kind of compound consolidation
Method.
2nd, present invention is particularly suitable for what hydraulic reclamation recently of reclaiming fields from the sea was formed to have superficial part barged-in fill+deep saturation soft clay
" binary " earth formation feature large-area soft foundation integrated treatment.Basement process designer can be before project hydraulic reclamation
Phase intervenes, and surveys data and project situation according to ground, analyzes hydraulic reclamation material source and character, hydraulic reclamation mode of making overall planning, step and
Overall construction plan, with reference to the method for processing foundation and thinking taken, reasonable construction yard drain system and precompressed system, both may be used
The operation of rapid deployment Foundation Treatment, avoid some from repeating process or waste, drainage power concretion method can be given full play to again
Advantage and its construction after effect (class piling prepressing effect, class vacuum preloading effect), obtain the optimal of technology, economy and time
Comprehensive benefit, this is also the key link that the present invention is different from other Soft foundation treatment technologies.
3rd, due to the setting of conversion layer, the vertical passive drainage system in the saturation Clayey Soil Ground of deep is actively arranged with superficial part
Aqueous systems can be realized and are indirectly connected with, and play respective draining advantage and feature, set two sets of systems more flexible, construction is more square
Just, specific aim is stronger.
4th, due to the setting of conversion layer, the underground water that the soft foundation deep saturation stickiness soil body is discharged through plastic draining board is
It can be discharged rapidly again by the light well point pipe network vacuum evacuation system that shallow-layer is arranged.Realize light well point pipe and plastic draining
After the indirect classification relay-type water-pumping/draining of plate, the setting spacing of place plastic strip drain bar can not be between the setting by light well point pipe
Away from restriction, and it is designed only for mud or silt soil strata concrete condition, so necessarily promotes the engineering method and become silted up for deep
Mud and the treatment effect on muddy soft soil stratum, effectively reinforce influence depth and significantly increase, it is general up to plastic draining board end
Depth bounds, can meet higher, deeper basement process requirement, and method applicability greatly improves.
5th, due to the setting of conversion layer, both having avoided plastic draining board heavy-tamping method, to be easily caused shallow-layer water content of soil too high,
Often damage of soil body forms the drawbacks of spongy soil, solves light well point (pipe well, vacuum tube well) precipitation combination heavy tamping treatment again
The limited technical barrier of deep layer saturation cohesive soil.
6th, middle-shallow layer Active Drainage system of the present invention can be according to different foundation conditions and project situation, using light well point pipe
The different modes such as net system, pipe well evacuation system, vacuum tube well evacuation system or the bright heat-extraction system of zanjon, and do not influenceed in Yield rainfall relation
On the premise of dynamic consolidation construction, using continuous Yield rainfall relation strong rammer mode, more preferably consolidation effect can be obtained, the duration also can be significantly
Shorten.
7th, vertical drainage passage can use plastic draining board, sand wick and sand drain in medium and deep saturation cohesive soil of the present invention
Deng different modes, and according to ground processing requirement, according to correlation theory and specification, specific aim drainage system design can be carried out, kept away
Exempt from the market drainage power concretion method and also rest on Empirical Design level at present to cause many nonstandard engineering phenomenons.
8th, the present invention is emphasized the quiet overburden pressure in weak soil surface (such as sand bedding course, crust layer, fill stratum), dynamic load (such as
Strong rammer, punching press) and its remnants after effect and Quick drainage system (active pump drainage：Vacuum, pumping；Passive draining：It is sand drain, packed
Sand drain, plastic draining board) organically combined and foundation in saturated soft soil is reinforced, it is dual solid with static(al) to be that one kind has power concurrently
The composite, water-drain consolidation method of knot pattern, have the construction period short, it is big to reinforce influence depth, the advantages of high treating effect.
The composite can be widely applied to reclaim fields from the sea the reinforcing of the soft foundation to be formed.
Brief description of the drawings
The present invention will be further described in detail below in conjunction with the accompanying drawings.
Fig. 1 is classification relay-type drainage model schematic diagram indirectly of the invention；
Fig. 2 is the piling prepressing system schematic diagram of the bottom saturation stickiness soil body；
Reference：1-top hydraulic reclamation soil layer；2-bottom saturation cohesive soil；3-level conversion layer；4-light well point
Pipe；5-plastic draining board；6-horizontal water header；7-transparent wired hose；8-vavuum pump；9-zanjon；10-water pump.
Embodiment
To make the goal of the invention of the present invention, technical scheme and beneficial effect of greater clarity, below in conjunction with the accompanying drawings to this
The embodiment of invention is illustrated, it is necessary to illustrate, in the case where not conflicting, in the embodiment and embodiment in the application
Feature can mutually be combined.
The core concept of the present invention is, for the shape of reclaiming fields from the sea including bottom saturation stickiness soil layer and top hydraulic reclamation soil layer
Into soft foundation, below the barged-in fill earth's surface 1.5m of top, set in the saturation stickiness soil layer top surface above depth bounds of bottom
Level conversion layer, the following soil layer of level conversion layer use static(al) drainage channel, and level conversion layer above soil layer uses dynamic drainage
Passage, the underground water in the following soil layer of level conversion layer are drained into level conversion layer through static(al) drainage channel, then arranged through power
Aquaporin is discharged soft foundation and realized under strong rammer dynamic action rapidly solidified.Wherein, the effect of level conversion layer be for it is dynamic,
Quiet drainage technology establishes horizontal drainage passage, therefore, it is desired to which the conversion layer should be arranged on infiltration coefficient relatively large (10-4cm/s
More than) sandy soil layer in, such as medium coarse sand, fine sand, flour sand or slity soil.
The operation principle that above-mentioned soft foundation is classified relay-type draining concretion method indirectly is：Due to depositing for level conversion layer
In the vacuum power that bottom mud or the Muddy Bottoms soil body can be made to be arranged through the underground water that plastic draining board is discharged again by shallow-layer
Evacuation system is discharged rapidly.Realize between initiative pump drainage (light well point pipe network) and passivity drainage channel (plastic draining board)
After connecing classification relay-type water-pumping/draining, the setting spacing of vertical drainage passage can not be by light-duty well in the saturation cohesive soil of place deep
The setting spacing of point pipe restricts, but according to mud and silt soil strata concrete condition, divided according to correlation theory or specification
Analysis is calculated and is pointedly designed.Due to the increase of vertical drainage passage in the saturation cohesive soil of deep, underground water level is oozed
The shortening of flow path, the dissipation of pore water pressure after pump drainage process and strong rammer certainly will be accelerated, while accelerating engineering construction progress,
Due to synchronously constructing for the piling prepressing system (plastic draining board+level conversion on the saturation cohesive soil practical significance of deep
Layer+top hydraulic reclamation soil layer+bright isostere the system of zanjon), it can also promote deep saturation cohesive soil in the quiet overburden pressure (barged-in fill in top
Layer), accelerate discharging consolidation under the collective effect of effect after dynamic load (strong rammer) and its remnants, so necessarily promote the engineering method pair
Treatment effect in deep mud and muddy soft soil stratum, effectively reinforcing influence depth can be significantly increased.
Under the guidance of above-mentioned core concept, during Specific construction technique comprise the following steps, incorporated by reference to Fig. 1 and Fig. 2：
Step 1: according to strengthening soft foundation is needed, (soft foundation is to include top hydraulic reclamation soil layer 1 and bottom saturation cohesive soil
Typical case " binary " earth formation of layer 2) geological mapping report and engineering situation and condition determine level conversion layer 3；It is it is determined that interior
Hold the implementation for including level conversion layer, position, thickness etc..
Step 2: classification relay-type drainage system indirectly is set.It is quiet to be specifically included in the following soil layer setting of level conversion layer
Power drainage channel, level conversion layer above soil layer set dynamic drainage passage.Wherein, static(al) drainage channel is spaced modeling
Expect that its setting spacing of drain bar 5 is d；Dynamic drainage passage can use light well point pipe to combine what is formed with horizontal water header 6
Space precipitation system or the bright row's mode of zanjon 9, by connecting vacuum-pumping pipeline and vavuum pump 8 in earth's surface, vacuum Yield rainfall relation is carried out,
Its embedded depth can be set according to the depth h1 and thickness h2 of conversion layer 3.Wherein, the setting spacing of light well point pipe is S1, water
The setting spacing of flat water header 6 is S2, and both junctions can be connected by transparent wired hose 7.Light well point pipe in Fig. 1
4 and plastic draining board 5 should possess superposition section (index high) in the range of level conversion thickness degree, can thus pass through horizontal turn
Change layer and realize being indirectly connected with for two sets of drainage channels, the effect of conversion layer is exactly to have ensured that the transport discharge approach of underground water is continuous
It is unobstructed.
Step 3: the foundation of the piling prepressing system for bottom saturation stickiness soil layer, periphery drainage system improve and
Processing；
Step 4, after improving periphery gutter drainage system and active evacuation system (light well point pipe network), you can taken out
Place underground water drops；Water in soft foundation in seepage flow to open drain can be drawn by the pump drainage of water pump 10 to outside the venue, or using the discrepancy in elevation
It flow to other regions outside the venue.When water level is down to below ground 3.0m or design requirement position, upper soil horizon is close to optimum moisture content
(error 3%~5%), after meeting strong rammer dynamic consolidation execution conditions, first pass strong rammer tamping point is laid in processing region, and pull out
First pass point rammer is carried out after the light well point pipe of tamping point influence area；It is bulldozed, rearranges or second time light-duty well of polishing after rammer
Point pipe network system, method are arranged with first pass light well point pipe network system, and carry out second time light well point Yield rainfall relation；Work as water level
It is down to below the 3.0m of ground or during design requirement position, then is carried out second time after can pulling out the light well point pipe of tamping point influence area
Point rams；It is so many to reach required bearing capacity all over Yield rainfall relation strong rammer is carried out, after more wheel Yield rainfall relations, point ram alternately time time construction,
1~2 time full rams finally is carried out to construct.Alternating Yield rainfall relation, point ram to be determined all over secondary (inspection) survey situation that can be supervised according to work progress, until
Meet design requirement；All over need during the dynamic consolidation construction to control excess pore pressure dissipation more than 90% to carry out it is next
All over construction.Full ram is terminated, and treats pore water pressure dissipation more than 90%, you can is carried out lower step Foundation Treatment Effect and is examined.
Step 5, Foundation Treatment Effect, which is examined, to be carried out according to design requirement and associated acceptance solid specification；
Step 6, IMM algorithm perform in accordance with relevant regulations.
Specifically, horizontal turn is being determined according to the geological mapping report and engineering situation that need strengthening soft foundation and condition
It is different below for the present position of level conversion layer after changing layer position, set indirect classification relay-type drainage system to provide two
Kind specific embodiment.
Embodiment one, when the depth of burying of level conversion layer below earth's surface in the range of 6m when, its Specific construction technique is：
1st, in conversion layer set-up below static(al) drainage channel, that is, injection plastic draining board is taken to required reinforcement depth (one
As can reach 20m), plastic draining board grid may be configured as 0.7~1.3m × 0.7~1.3m, and actual arrangement grid can base area
The technical indicator of matter condition and design requirement determines.
2nd, after plastic draining board inserts certain deep layer according to necessary requirement, the plastic draining board time that top is exposed to earth's surface is inserted
Enter the soil body, it is below earth's surface 3m to return slotting depth, can be returned and inserted using manually or mechanically mode during practice of construction, in order to avoid through strong rammer
Form top layer drainage channel afterwards and influence topsoil.
3rd, conversion layer dynamic drainage system established above, because the conversion layer is in more than 6m positions, then can use light-duty
Well-points dewatering or the bright row's mode of zanjon, by connecting vacuum-pumping pipeline in earth's surface, vacuum Yield rainfall relation is carried out, its embedded depth can root
Set according to the depth and thickness of conversion layer, arrangement grid is preferably 4m × 4m, and actual arrangement grid can be according to geological conditions and design
It is required that technical indicator determine.
Embodiment two, when the depth of burying of level conversion layer is more than below earth's surface 6m, its Specific construction technique is：
1st, in conversion layer set-up below static(al) drainage channel, that is, injection plastic draining board is taken to required reinforcement depth (one
As can reach 20m), plastic draining board grid may be configured as 0.7~1.3m × 0.7~1.3m, and actual arrangement grid can base area
The technical indicator of matter condition and design requirement determines.
2nd, after plastic draining board inserts certain deep layer according to necessary requirement, the plastic draining board time that top is exposed to earth's surface is inserted
Enter the soil body, it is below earth's surface 3m to return slotting depth, can be returned and inserted using manually or mechanically mode during practice of construction, in order to avoid through strong rammer
Form top layer drainage channel afterwards and influence topsoil.
3rd, conversion layer dynamic drainage system established above, because the conversion layer is in below 6m positions, then can use pipe well,
Sand drain mode, by connecting vacuum-pumping pipeline in earth's surface, vacuum Yield rainfall relation is carried out, its embedded depth can be according to the depth of conversion layer
And thickness is set, arrangement grid is generally 10~15m × 10~15m, and actual arrangement grid can be wanted according to geological conditions and design
The technical indicator asked determines.
Above-mentioned technical proposal in the specific implementation, meets top layer equipment, the unapproachable place of personnel, then can use water digging machine
Into reinforcing area is needed, the method for taking the bright row that ditches, by manual manufacture shallow-layer crust layer, enter board-plugging device, well sinker
Reinforcing area is needed, establishes classification relay-type drainage system indirectly.
Above-mentioned technical proposal in the specific implementation, can basis when designer intervenes during project hydraulic reclamation of reclaiming fields from the sea
Hydraulic reclamation material character and source spread embankment formula shape in a certain rationally absolute altitude section by hydraulic reclamation mode in a organized way or outsourcing sandy soil
Into conversion layer；It is certain when existing in below the soft foundation surface 1.5m that reclaims fields from the sea, deep saturation cohesive soil top surface range above
Thickness (more than 0.5m) and infiltration coefficient relatively large (10-4More than cm/s) sandy soil layer when, can be by it directly as conversion
Layer utilizes.
For the foundation of the piling prepressing system of bottom saturation stickiness soil layer, the perfect and processing step of periphery drainage system
Middle needs are described as follows some：
1st, structure is for the piling prepressing system on the saturation cohesive soil practical significance of deep.Due to being implemented in the full viscosity in deep
The conversion layer on soil layer top possesses the horizontal transportation function of good underground water, and soft foundation of reclaiming fields from the sea is directed to for synchronous structure
It is convenient and possible that the piling prepressing system of deep saturation cohesive soil provides, and the piling prepressing system is by plastic draining board, level
Conversion layer, top hydraulic reclamation soil layer and periphery drainage system composition.
2nd, disposal field periphery gutter drainage system is improved, open drain can be set along place periphery；When Treatment stations ground
, also can multi-block technique shape arrangement when product is larger.
3rd, when the disposal field periphery recharge of ground water is very fast, water is larger, it should need reinforcing area periphery that sealing is set
The supply of peripheral water during wall, barrier or reduction Yield rainfall relation dynamic consolidation construction.When sealing requirements are higher, particularly place is present not
During the interlayer soil of rule, it can use the technique of deep-layer stirring that envelope wall is set, envelope wall depth should be below conversion layer, into full
Be not less than 500mm below cohesive soil top surface.When taking construction flow process method, then can every 3~50,000 square meters be an area
Domain is set.
Although disclosed embodiment is as above, its content is only to facilitate understand the technical side of the present invention
Case and the embodiment used, are not intended to limit the present invention.Any those skilled in the art to which this invention pertains, not
On the premise of departing from disclosed core technology scheme, any modification can be made in the form and details of implementation and is become
Change, but the protection domain that the present invention is limited, the scope that must be still limited by appended claims are defined.
Claims (6)
1. soft foundation is classified relay-type draining concretion method indirectly, the soft foundation includes bottom saturation stickiness soil layer and top
Hydraulic reclamation soil layer, it is characterised in that：Below the hydraulic reclamation soil layer earth's surface 1.5m of top, bottom saturation stickiness soil layer top surface above depth model
Interior setting level conversion layer is enclosed, the following soil layer of level conversion layer uses static(al) drainage channel, and level conversion layer above soil layer uses
Active pump-drainage type dynamic drainage passage, the underground water in the following soil layer of level conversion layer drain into level conversion through static(al) drainage channel
In layer, then discharge through active pump-drainage type dynamic drainage passage, and soft foundation is quickly handled with reference to strong rammer, realize solid
Knot；
Level conversion layer makes bottom mud or the Muddy Bottoms soil body through the underground water that static(al) drainage channel is discharged again by shallow-layer cloth
The active pump-drainage type dynamic drainage passage put is discharged rapidly；
After active pump-drainage type dynamic drainage passage is classified relay-type water-pumping/draining indirectly with static(al) drainage channel, place deep saturation sticks
Property soil in the setting spacing of vertical drainage passage can not be restricted by the setting spacing of light well point pipe, but according to mud and silt
Shale soil layer concrete condition is designed；
The increase of vertical drainage passage in the saturation cohesive soil of deep, the shortening of the horizontal percolation path of underground water, accelerates pump drainage mistake
The dissipation of pore water pressure after journey and strong rammer, accelerates engineering construction progress；
Synchronously construct the plastic draining board for deep saturation cohesive soil+level conversion layer+top hydraulic reclamation soil layer+bright row of zanjon
Piling prepressing system, promote saturation cohesive soil effect after the quiet overburden pressure in top, dynamic load and its remnants in deep to be total to
Accelerate discharging consolidation under same-action；
Its Specific construction step is as follows：
Step 1: level conversion layer is determined according to the geological mapping report and engineering situation that need strengthening soft foundation and condition；Really
Determine implementation of the content including level conversion layer, position, thickness；
Step 2: setting classification relay-type drainage system indirectly, it is specifically included in the following soil layer of level conversion layer and sets static(al) to arrange
Aquaporin, level conversion layer above soil layer set dynamic drainage passage, wherein, static(al) drainage channel is spaced plastic row
Water plate, it is d that it, which sets spacing,；Dynamic drainage passage combines the space precipitation to be formed with horizontal water header using light well point pipe
System, by connecting vacuum-pumping pipeline and vavuum pump in earth's surface, carry out vacuum Yield rainfall relation, its embedded depth is according to the depth of conversion layer
H1 and thickness h2 is spent to set, wherein, the setting spacing of light well point pipe is S1, and the setting spacing of horizontal water header is S2, two
The junction of person is connected by transparent wired hose, and light well point pipe and plastic draining board should be in level conversion layer thickness ranges
Inside possess superposition section, being indirectly connected with for two sets of drainage channels is thus realized by level conversion layer, the effect of conversion layer is to protect
The transport discharge approach for hindering underground water is continuously unobstructed；
Step 3: the piling prepressing system of structure bottom saturation stickiness soil layer, improves and handles periphery drainage system；
Step 4: after improving periphery gutter drainage system and active evacuation system, can carry out taking out drop place underground water；Flabbily
Water in base in seepage flow to open drain is drained to other regions outside the venue by water pump pump drainage to outside the venue, or using the discrepancy in elevation；Work as water level
It is down to below the 3.0m of ground or design requirement position, upper soil horizon meets strong rammer dynamic consolidation construction bar close to optimum moisture content
After part, first pass strong rammer tamping point is laid in processing region, and first pass is carried out after pulling out the light well point pipe of tamping point influence area
Point rams；It is bulldozed, rearranges or second time light well point pipe network system of polishing after rammer, method is the same as first pass light well point pipe network system
System arrangement, and carry out second time light well point Yield rainfall relation；When water level is down to below ground 3.0m or design requirement position, then pull out
Rammed except second time point is carried out after the light well point pipe of tamping point influence area；So many time progress Yield rainfall relation strong rammer, reaches required
Bearing capacity, after wheel Yield rainfall relation more, point rammer are alternately constructed, finally carry out 1~2 time full rammer construction；
Step 5: full ram is terminated, pore water pressure dissipation more than 90% is treated, can be entered according to design requirement and associated acceptance solid specification
Row Foundation Treatment Effect is examined；
Step 6: IMM algorithm.
2. soft foundation according to claim 1 is classified relay-type draining concretion method indirectly, it is characterised in that：The level
Conversion layer is arranged on infiltration coefficient >=10-4In cm/s sandy soil layer, and it is continuously distributed in on-site.
3. soft foundation according to claim 1 is classified relay-type draining concretion method indirectly, it is characterised in that：The level
Conversion layer sticks before the formation of top hydraulic reclamation soil layer after artificial hydraulic reclamation formation or top hydraulic reclamation soil layer are formed according to bottom saturation
Property soil layer top surface above soil layer soil condition determine.
4. soft foundation according to claim 1 is classified relay-type draining concretion method indirectly, it is characterised in that：The level
The thickness of conversion layer determines according to soil condition.
5. soft foundation according to claim 4 is classified relay-type draining concretion method indirectly, it is characterised in that：The level
Thickness >=0.5m of conversion layer.
6. soft foundation according to claim 1 is classified relay-type draining concretion method indirectly, it is characterised in that：The plastics
After drain bar inserts certain depth according to necessary requirement, the plastic draining board that top is exposed to earth's surface returns the insertion soil body, returns slotting deep
Spend for below earth's surface 3m.
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| CN201510394029.7A CN105002883B (en) | 2015-07-07 | 2015-07-07 | Soft foundation is classified relay-type draining concretion method indirectly |
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| CN201510394029.7A CN105002883B (en) | 2015-07-07 | 2015-07-07 | Soft foundation is classified relay-type draining concretion method indirectly |
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| CN107916662B (en) * | 2017-11-28 | 2019-09-10 | 武汉大学 | Soft foundation discharge fixing method |
| CN112030936A (en) * | 2020-09-04 | 2020-12-04 | 中交天航滨海环保浚航工程有限公司 | Construction method for treating soft soil foundation of hydraulic reclamation project |
| CN112883546A (en) * | 2021-01-13 | 2021-06-01 | 上海市水利工程设计研究院有限公司 | Method for determining deformation modulus of backfill material around plastic drainage pipeline |
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| JP3654882B2 (en) * | 2002-12-09 | 2005-06-02 | 大洋基礎株式会社 | Ground improvement method |
| CN101377077B (en) * | 2007-08-29 | 2012-02-29 | 林佳栋 | Blowing, filling, stacking , loading, precipitating, pre-pressing and strong tamping combined soft soil foundation treating method |
| CN101250868B (en) * | 2008-03-12 | 2010-10-13 | 中交第四航务工程局有限公司 | Precipitation prepressing association motive power induration deep densification method |
| CN101666082B (en) * | 2009-08-24 | 2010-12-29 | 叶凝雯 | Laminated consolidation method for reinforcing muddy soft soil foundation |
| CN101818494A (en) * | 2010-04-28 | 2010-09-01 | 郭艳景 | Soft soil foundation treatment method by three-dimensional drainage power pre-pressing consolidation |
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