CN106677158B - A kind of blowing-filling sludge superficial layer Quick uniform processing method and structure recently - Google Patents
A kind of blowing-filling sludge superficial layer Quick uniform processing method and structure recently Download PDFInfo
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- CN106677158B CN106677158B CN201710117197.0A CN201710117197A CN106677158B CN 106677158 B CN106677158 B CN 106677158B CN 201710117197 A CN201710117197 A CN 201710117197A CN 106677158 B CN106677158 B CN 106677158B
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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
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0053—Production methods using suction or vacuum techniques
Abstract
The invention discloses a kind of blowing-filling sludge superficial layer Quick uniform processing method and structures recently, blowing-filling sludge to be processed is located on the base of original place, the following steps are included: blowing-filling sludge upper surface to be processed is successively equipped with lower geotextile layer, upper geotextile layer and two layers of vacuum sealing film, manually it is inserted with vertical long and short drain bar downwards from lower geotextile layer, the vertical long and short drain bar is connected with different vacuum pumps, that is vacuum pump one and vacuum pump two are connected between the upper surface of the vertical short drain bar with horizontal draining board；Start vacuum pump one and vacuum pump two simultaneously first, and stablizes 15 days~20 days reaching 80kpa or more；It is then shut off vacuum pump two, vacuum pump one is closed after vacuum pump one is continued to run 15 days~20 days；Finally starting vacuum pump two stops vacuumizing after running 7 days~10 days, reaches design requirement.The invention avoids the generation of " earth pillar ", be conducive to the ground secondary treatment for avoiding the later period, to reduce time cost and fund input cost again.
Description
Technical field
The present invention relates to the foundation treatment technology fields of the fixed buildings such as port engineering, architectural engineering, highway engineering, especially
It is related to a kind of blowing-filling sludge superficial layer Quick uniform processing method and structure recently.
Background technique
In recent years, as coastal strand Park district economy construction investment paces are accelerated, it is becoming tight land resource day, to guarantee warp
Help the connecting built, and large area becomes one of the effective way that coastal area solves land resource scarcity, due to China coast
The shortage of sand resource, reclaiming fields from the sea generally to be increased using blowing-filling sludge is handled, and due to saturated dredger soft soil high-moisture, is suppressed
Contracting, low-permeability, ultralow bearing capacity bad engineering characteristic, not can guarantee subsequent soft base construction big machinery and personnel into
?.
In order to which to saturated dredger soft soil, especially blowing-filling sludge carries out the reinforcing of superficial layer recently, and the country is being invented simultaneously nearly ten years
Superficial layer technique of soft soil foundation treatment, vacuum preloading (the directly discharging type vacuum prepressing skill of the flat sand bedding course of free direct-drain water therein are promoted
Art) it is even more to be widely used in recent years.But in Guangdong, Fujian, Wenzhou, Ningbo, Qingdao, Lianyun Harbour, Tianjin, Dalian etc.
It is found in the practice on ground, with occurring so-called " earth pillar (native stake) " after the technical treatment recently blowing-filling sludge, i.e., approximation is to drain
Plate is center axis, the from top to bottom irregular column of diameter not etc., and being reflected in earth's surface is exactly " column (stake) head ".It opens at many scenes
Dig experiments have shown that, the height of " earth pillar (native stake) " is generally in 1.5m~1.6m, and in the up big and down small form of falling elliptic cone, upper end is straight
Diameter 0.5m~0.6m, such as to drain plate spacing as 0.8m, " earth pillar (native stake) " upper end spacing is 0.2m~0.3m, when weak soil depth
For 1.0m, then earth pillar (native stake) depth is 0.4m~0.6m, and when weak soil depth is 1.5m~1.6m, then earth pillar (native stake) depth is
0.8m, soil body range between " earth pillar (native stake) " is that treated weak band, weakness shows as strong, weak alternate with place
Inhomogeneities.In 1.5m~1.6m or less drain bar generally without clay attachment phenomenon, weak soil discharging consolidation is substantially uniform, and deep
Intensity is higher than superficial part.For blowing-filling sludge place, the purpose of superficial processing is to be formed the working face further constructed, and one
As the influence depth of construction equipment be 2m~3m, reach due to this place surface layer caused by " earth pillar (native stake) " phenomenon is inhomogenous
Less than processing intent, therefore eliminates directly discharging type vacuum prepressing and form " earth pillar (native stake) " phenomenon with very direct engineering meaning
Justice.
For forming " earth pillar (native stake) " above by traditional directly discharging type vacuum prepressing, using the gradual of classification
The method of vacuum preloading pressurization or encryption draining plate spacing is eliminated, but there is processing again after using these suggestion and measures
The problem of time long (being increased to 90 days~100 days by 45 days~50 days) and processing cost increase.It is therefore desirable to existing
The method and structure that silt soft soil superficial layer is handled make improvements.
Summary of the invention
Aiming at the shortcomings in the prior art, the present invention provides a kind of blowing-filling sludge superficial layer Quick uniform processing sides recently
Method and structure eliminate the place non-uniform phenomenon that depth is generated by directly discharging type vacuum prepressing within 2m, avoid " earth pillar
The generation of (native stake) ", is conducive to the secondary treatment for avoiding the later period, to reduce time cost and fund input cost again.
To achieve the goals above, the technical solution used in the present invention is:
Recently blowing-filling sludge superficial layer Quick uniform processing method, blowing-filling sludge to be processed are located on the base of original place one kind,
Include the following steps:
Step 1, blowing-filling sludge upper surface to be processed are equipped with lower geotextile layer, manually plug downwards from lower geotextile layer
There are vertically long drain bar and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, institute
It states in the original place base under the insertion depth to blowing-filling sludge to be processed of vertically long drain bar, the adjacent vertically long drain bar is logical
It crosses long slab directly discharging type vacuum pipe to be connected, each long slab directly discharging type vacuum pipe is connected with vacuum pump one, and adjacent is described vertical
Straight short drain bar is connected by short slab directly discharging type vacuum pipe, and each short slab directly discharging type vacuum pipe is connected with vacuum pump two,
It is connected between the upper surface of the vertical short drain bar with the horizontal draining board of high water-permeability plastics, the horizontal draining board water
Tiling is located at the upper surface of vertical short drain bar, is equipped with geotextile layer above the horizontal draining board, in upper geotextile layer
Side is equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, buries under lower layer's vacuum sealing film
There is vacuum meter, two layers of vacuum sealing film surrounding is excavated with press mold ditch, and press mold ditch is backfilled with silt clay, wherein vertically
Long drain bar connects different vacuum pumps with vertical short drain bar, to realize to vertically long drain bar and vertical short drain bar
Control is vacuumized, so that the different upper layer weak soil and lower layer's weak soil of moisture content and inserting vertically long drain bar, vertical short drain bar model
The weak soil enclosed can be controlled with the vacuum pump different time, preferably to facilitate the operation for carrying out people；
Step 2: starting vacuum pump one and the progress vacuum preloading of vacuum pump two simultaneously, by burying under above-mentioned vacuum sealing film
If vacuum meter reach 80kpa or more and stablize 15 days~20 days；
Step 3: closing vacuum pump two, vacuum pump one is continued to run 15 days~20 days, vacuum pump one is then shut off；
Step 4: starting vacuum pump two, the vacuum pump two stops reaching design requirement after running 7 days~10 days, overall
The vacuum preloading time is 45 days~50 days, to realize to the equal of blowing-filling sludge upper layer High water cut weak soil (1.5m~2.0m) to be processed
Even reinforcing is reinforced.
Vertically long drain bar and vertical short drain bar use the plastic draining board of SPB-B type in the step 1.
Spacing in the step 1 between the long drain bar of neighboring vertical presses 0.8m~0.9m, the long drain bar of neighboring vertical
Between spacing be by the spacing between the long drain bar of neighboring vertical by blowing-filling sludge surface layer ultra-soft soil's water content to be processed depending on,
When blowing-filling sludge surface layer ultra-soft soil's water content to be processed is greater than 110%, the spacing between the long drain bar of neighboring vertical is
0.8m, when blowing-filling sludge surface layer ultra-soft soil's water content to be processed is lower than 110%, between the long drain bar of neighboring vertical between
Away from for 0.9m, the spacing between the long drain bar of neighboring vertical is determined by the concrete condition of moisture content so as to more preferably realize
The speed and efficiency of draining, are better able to satisfy the use demand.
Vertical short drain bar is inserted into 1.5m~2.0m in blowing-filling sludge to be processed in the step 1, vertical short drain bar
Insertion depth is by blowing-filling sludge surface layer ultra-soft soil's water content, sand content and infiltration coefficient to be processed etc. factor according to specific feelings
Depending on condition, specifically when blowing-filling sludge surface layer ultra-soft soil's water content to be processed is greater than 110%, (moisture content is greater than 110%
Weak soil to be treated), take 2.0m when sand content is less than 5%, sand content takes 1.5m when being greater than 15%, silt content 5%~
Any number in 1.5m~2.0m is taken when 15%.
High water-permeability plastics c-type drain bar or use can be used in the horizontal draining board of high water-permeability plastics in the step 1
Permeable, gas permeability circular wave chimney filter replacement, the upper surface of vertical short drain bar is laid on by horizontal draining board level, is made
Horizontal drainage channel is formed at the blowing-filling sludge surface layer ultra-soft soil top to be processed of vertical short drain bar control, to quickly be discharged soft
The Free water on native surface layer, the horizontal draining board can also be used horizontal drain pipe and mutually replace, mode multiplicity, available leeway compared with
Greatly.
Recently blowing-filling sludge superficial layer Quick uniform processing structure, blowing-filling sludge to be processed are located on the base of original place one kind,
The blowing-filling sludge upper surface to be processed is equipped with lower geotextile layer, is manually inserted with vertically long draining downwards from lower geotextile layer
Plate and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, and the neighboring vertical is long
Spacing between drain bar is 0.8m~0.9m, between the long drain bar of neighboring vertical spacing be by the long drain bar of neighboring vertical it
Between spacing by depending on blowing-filling sludge surface layer ultra-soft soil's water content to be processed, when in blowing-filling sludge surface layer to be processed ultra-soft soil
When moisture content is greater than 110%, the spacing between the long drain bar of neighboring vertical is 0.8m, when in blowing-filling sludge surface layer to be processed ultra-soft
When soil's water content is lower than 110%, the spacing between the long drain bar of neighboring vertical is 0.9m, the insertion of the vertically long drain bar
In original place base under depth to blowing-filling sludge to be processed, the vertical short drain bar be inserted into 1.5m in blowing-filling sludge to be processed~
2.0m, the insertion depth of vertical short drain bar is by blowing-filling sludge surface layer ultra-soft soil's water content to be processed, sand content and infiltration system
Number etc. factors as the case may be depending on, specifically blowing-filling sludge surface layer ultra-soft soil's water content to be processed be greater than 110%
When (moisture content be greater than 110% be only weak soil to be treated), 2.0m is taken when sand content is less than 5%, when sand content is greater than 15%
1.5m is taken, silt content takes any number in 1.5m~2.0m at 5%~15%, and the adjacent vertically long drain bar passes through length
Plate directly discharging type vacuum pipe is connected, and each long slab directly discharging type vacuum pipe is connected with vacuum pump one, and adjacent is described vertical short
Drain bar is connected by short slab directly discharging type vacuum pipe, and each short slab directly discharging type vacuum pipe is connected with vacuum pump two, described
It is connected between the upper surface of vertical short drain bar with the horizontal draining board of high water-permeability plastics, the horizontal draining board level paving
It is located at the upper surface of vertical short drain bar, geotextile layer, paving above upper geotextile layer are equipped with above the horizontal draining board
Equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, it is embedded under lower layer's vacuum sealing film true
Empty table, two layers of vacuum sealing film surrounding are excavated with press mold ditch, and press mold ditch is backfilled with silt clay.
Vertically long drain bar in the present invention and vertical short drain bar be in matrix equidistantly distributed, particularly every row
A square is constituted between vertically long drain bar, then square center position is inserted with vertical short drain bar, thus
Constitute one it is quincunx so that the vertically long drain bar on center position vertically short drain bar to periphery is equidistant, have in this way
Conducive to blowing-filling sludge superficial layer non-uniform phenomenon is reduced, be conducive to the secondary treatment for avoiding the later period, to reduce time cost
With fund input cost again.
Inventive principle
Saturated dredger soft soil is usually to flow mud~mud scum, and surface layer is almost slime water, has particle carefully uneven, High water cut
The features such as rate, high-ductility, high-compressibility and extremely low intensity.A large amount of sampling test tables of the blast-filled ground after 1 month~3 months
Bright, moisture content highest in 0.5m~2.0m gradually decreases down up to 110%~150%；Vane shear strength (Cu value)
It is 0 in 0.5m~2.0m, is gradually increased to 2kpa~5kpa down.This is because blowing-filling sludge early stage falls produced by silt process
The phenomenon that.When being handled using directly discharging type vacuum prepressing, since the suction of negative pressure of vacuum produces in the High water cut soil body
Raw penetration makes clay migrate and be gradually attached on drain bar outer membrane to drain bar, thickeies over time and constantly
It unites and forms " earth pillar " around drain bar, and the Free water except " earth pillar " is prevented to suck in vertical drain bar, make drain bar
Between the soil body cannot further discharging consolidation and to eventually lead to basement process uneven.
Many digging in-situs experiments have shown that, the length of " earth pillar " is generally in 1.5m~1.6m, in the up big and down small ellipse that falls
Cone shape, upper end diameter 0.5m~0.6m, such as to drain plate spacing as 0.8m, " earth pillar " upper end spacing is 0.2m~0.3m, is blown
Filling out earth pillar depth when mud depth is 1.0m is 0.4m~0.6m, and earth pillar is 0.8m when blowing-filling sludge depth is 1.5m~1.6m,
Soil body range between " earth pillar " is that treated weak band, place shows as strong, weak alternate inhomogeneities.1.5m~
For 1.6m or less drain bar generally without clay attachment phenomenon, weak soil discharging consolidation is substantially uniform, and deep intensity is higher than superficial part.For
For blowing-filling sludge place, the purpose of superficial processing is to form the working face further constructed, the influence of general construction equipment
Depth is 2m~3m, this because caused by " earth pillar " phenomenon place surface layer it is inhomogenous, so that processing intent be not achieved.Therefore disappear
" earth pillar " phenomenon is formed except directly discharging type vacuum prepressing with very direct engineering significance.In order to eliminate within 2m depth because straight
Row's formula vacuum preloading and the place non-uniform phenomenon generated, prevent the generation of " earth pillar ", and the present invention is from lower geotextile layer to servant
Work is inserted with vertically long drain bar and vertical short drain bar, according to the combination of vertically long drain bar and vertical short drain bar, strengthens
The consolidation of mud and control clay are formed " native on drain bar (vertically long drain bar and vertical short drain bar) top in the 2m of surface layer
The Quick uniform of column " is handled.The present invention is using vertically long drain bar and vertical short drain bar, vertically long drain bar and vertically short row
The corresponding vacuum pump one of water plate and vacuum pump two control vertically long draining by different vacuum pump one and vacuum pump two
The evacuated time of plate and vertical short drain bar, to realize outside the barged-in fill discharging consolidation of different designs depth, emphasis improves table
The intensity of mud within layer 2m；Open vacuum pump precompressed → stop vertical short drain bar simultaneously with first vacuum pump one and vacuum pump two
Vacuum pump two, the vacuum pump one for only starting vertically long drain bar carry out the vacuum pump one of the vertically long drain bar of vacuum preloading → stop,
Only open two vacuum preloading of vacuum pump of vertical short drain bar.Clay can be promoted in the initial rank of vacuum preloading by such step
Segment sync drains compression concretion between vertically long drain bar and vertical short drain bar, prevents from generating " earth pillar " on surface layer and makes 2m
The soil body in depth is strengthened processing because moisture content is high, intensity is low.Since vertical short drain bar upper surface is permeable with height
Property plastics horizontal draining board carry out horizontal connection, the surface layer High water cut mud between vertically long drain bar can be made quickly to be discharged from
By water, surface layer clay is reduced or prevented to migrate to vertical displacement hull and be attached to vertically long drain bar and vertical short drain bar outer layer
It on filter membrane, prevents " earth pillar " to be formed, improves the uniformity for the treatment of, be conducive to the secondary treatment for avoiding the later period, to reduce
Time cost and fund input cost again.
Beneficial effects of the present invention:
1) present invention blowing-filling sludge upper surface to be processed is equipped with lower geotextile layer, manually plugs downwards from lower geotextile layer
There are vertically long drain bar and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, institute
It states in the original place base under the insertion depth to blowing-filling sludge to be processed of vertically long drain bar, the adjacent vertically long drain bar is logical
It crosses long slab directly discharging type vacuum pipe to be connected, each long slab directly discharging type vacuum pipe is connected with vacuum pump one, and adjacent is described vertical
Straight short drain bar is connected by short slab directly discharging type vacuum pipe, and each short slab directly discharging type vacuum pipe is connected with vacuum pump two,
It is connected between the upper surface of the vertical short drain bar with the horizontal draining board of high water-permeability plastics, the horizontal draining board water
Tiling is located at the upper surface of vertical short drain bar, is equipped with geotextile layer above the horizontal draining board, in upper geotextile layer
Side is equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, buries under lower layer's vacuum sealing film
There is vacuum meter, two layers of vacuum sealing film surrounding is excavated with press mold ditch, and press mold ditch is backfilled with silt clay, on the one hand ties
Structure is simple, convenient to carry out, on the other hand eliminates the field that depth is generated by directly discharging type vacuum prepressing within 2m so as to realize
Ground non-uniform phenomenon avoids the generation of " earth pillar (native stake) "；
2) present invention passes through while starting vacuum pump one and vacuum pump two carries out vacuum preloading, passes through above-mentioned vacuum sealing film
Under inbuilt vacuum meter reach 80kpa or more and stablize 15 days~20 days；Vacuum pump two is closed, vacuum pump one is continued to run 15
It~20 days, it is then shut off vacuum pump one；Finally start vacuum pump two, stops after the vacuum pump two is run 7 days~10 days
Reach design requirement, the reinforcing of blowing-filling sludge recently can be rapidly completed in 45 days~50 days using the present invention, to reduce
Time cost and fund input cost again, are also prevented from surface layer and generate " earth pillar (native stake) " phenomenon, be also beneficial to make high-moisture percentage
Mud obtains uniform treatment, is also beneficial to avoid the secondary treatment in later period.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of blowing-filling sludge superficial layer Quick uniform processing method recently of the present invention；
Fig. 2 is a kind of diagrammatic cross-section of blowing-filling sludge superficial layer Quick uniform processing structure recently of the present invention；
Fig. 3 is a kind of top view of blowing-filling sludge superficial layer Quick uniform processing structure recently of the present invention.
Specific embodiment
As shown in Figure 1, a kind of blowing-filling sludge superficial layer Quick uniform processing method recently, blowing-filling sludge to be processed are located at original
On ground, include the following steps:
Step 1, blowing-filling sludge upper surface to be processed are equipped with lower geotextile layer, manually plug downwards from lower geotextile layer
There are vertically long drain bar and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, institute
It states vertically long drain bar and vertical short drain bar uses the plastic draining board of SPB-B type, between the long drain bar of neighboring vertical
Spacing be 0.8m~0.9m, between the long drain bar of neighboring vertical spacing be by the spacing between the long drain bar of neighboring vertical by
Depending on blowing-filling sludge surface layer ultra-soft soil's water content to be processed, it is greater than when in blowing-filling sludge surface layer ultra-soft soil's water content to be processed
When 110%, the spacing between the long drain bar of neighboring vertical is 0.8m, when in blowing-filling sludge surface layer ultra-soft soil's water content to be processed
When lower than 110%, the spacing between the long drain bar of neighboring vertical is 0.9m, and adjacent hang down is determined by the concrete condition of moisture content
Spacing between straight long drain bar is better able to satisfy the use demand, institute so as to more preferably realize the speed and efficiency of draining
It states in the original place base under the insertion depth to blowing-filling sludge to be processed of vertically long drain bar, the vertical short drain bar is inserted into wait locate
1.5m~2.0m in blowing-filling sludge is managed, the insertion depth of vertical short drain bar is by the aqueous of blowing-filling sludge surface layer to be processed ultra-soft soil
Rate, sand content and infiltration coefficient etc. factor as the case may be depending on, specifically blowing-filling sludge surface layer to be processed ultra-soft soil
Moisture content when being greater than 110% (moisture content be greater than 110% be only weak soil to be treated), take 2.0m when sand content is less than 5%,
Sand content takes 1.5m when being greater than 15%, silt content takes any number in 1.5m~2.0m at 5%~15%, and adjacent is described vertical
Straight long drain bar is connected by long slab directly discharging type vacuum pipe, and each long slab directly discharging type vacuum pipe is connected with vacuum pump one,
The adjacent vertical short drain bar is connected by short slab directly discharging type vacuum pipe, each short slab directly discharging type vacuum pipe connection
There is vacuum pump two, is connected between the upper surface of the vertical short drain bar with the horizontal draining board of high water-permeability plastics, it is high saturating
The horizontal draining board of water-based plastic can be used high water-permeability plastics c-type drain bar or be filtered using permeable, gas permeability circular wave
Pipe replacement, the upper surface of vertical short drain bar is laid on by horizontal draining board level, make vertical short drain bar control wait locate
It manages blowing-filling sludge surface layer ultra-soft soil top and forms horizontal drainage channel, so that the Free water on weak soil surface layer, the water quickly be discharged
Flat drain bar can also be used horizontal drain pipe and mutually replace, and mode multiplicity, available leeway is larger, and the horizontal draining board is horizontal
It is laid on the upper surface of vertical short drain bar, geotextile layer, upper geotextile layer top are equipped with above the horizontal draining board
It is equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, is embedded under lower layer's vacuum sealing film
Vacuum meter, two layers of vacuum sealing film surrounding are excavated with press mold ditch, and press mold ditch is backfilled with silt clay, wherein vertically long
Drain bar connects different vacuum pumps with vertical short drain bar, to realize the pumping to vertically long drain bar and vertical short drain bar
Vacuum control, so that the different upper layer weak soil and lower layer's weak soil of moisture content and inserting vertically long drain bar, vertical short drain bar range
Weak soil can be controlled with the vacuum pump different time, so as to preferably facilitate carry out people operation；
Step 2: starting vacuum pump one and the progress vacuum preloading of vacuum pump two simultaneously, by burying under above-mentioned vacuum sealing film
If vacuum meter reach 80kpa or more and stablize 15 days~20 days；
Step 3: closing vacuum pump two, vacuum pump one is continued to run 15 days~20 days, vacuum pump one is then shut off；
Step 4: starting vacuum pump two, the vacuum pump two stops reaching design requirement after running 7 days~10 days, thus
Realize that the uniform reinforcing to blowing-filling sludge upper layer High water cut weak soil (1.5m~2.0m) to be processed is reinforced.
As shown in Figures 2 and 3, a kind of blowing-filling sludge superficial layer Quick uniform processing structure recently, blowing-filling sludge 1 to be processed
Between original place base 2,1 upper surface of blowing-filling sludge to be processed is equipped with lower geotextile layer 11, from lower geotextile layer 11 to
It is manually inserted with vertically long drain bar 12 and vertical short drain bar 13 down, vertically long drain bar 12 and vertical short drain bar 13 are in
Matrix equidistantly distributed, the spacing between the long drain bar 12 of neighboring vertical is by 1 surface layer ultra-soft soil of blowing-filling sludge to be processed
Depending on moisture content, the spacing between the specific long drain bar 12 of neighboring vertical is 0.8m~0.9m, when in blowing-filling sludge table to be processed
It is 0.8m that layer ultra-soft soil's water content, which is greater than spacing when 110% between adjacent vertically long drain bar, is become silted up when in hydraulic reclamation to be processed
It is 0.9m that mud surface layer ultra-soft soil's water content, which is lower than spacing when 110% between adjacent vertically long drain bar, passes through moisture content
Concrete condition is come the speed and efficiency that determine the spacing between the long drain bar of neighboring vertical so as to more preferably realize draining, more
It can satisfy use demand, in the original place base 2 under the insertion depth to blowing-filling sludge 1 to be processed of the vertically long drain bar 12,
The vertical short drain bar 13 is inserted into 1.5m~2.0m in blowing-filling sludge 1 to be processed, and the insertion depth of vertical short drain bar 13 is pressed
1 surface layer ultra-soft soil's water content of blowing-filling sludge, sand content and infiltration coefficient to be processed etc. factor as the case may be depending on, tool
Body when 1 surface layer ultra-soft soil's water content of blowing-filling sludge to be processed is greater than 110%, (moisture content is greater than 110% and is only and needs to locate
The weak soil of reason), 2.0m is taken when sand content is less than 5%, sand content takes 1.5m when being greater than 15%, and silt content takes at 5%~15%
Any number in 1.5m~2.0m, the adjacent vertically long drain bar 12 are connected by long slab directly discharging type vacuum pipe 121, often
A long slab directly discharging type vacuum pipe 121 is connected with vacuum pump 1, and the adjacent vertical short drain bar 13 is straight by short slab
Row's formula vacuum tube 131 is connected, and each short slab directly discharging type vacuum pipe 131 is connected with vacuum pump 2 132, the vertical short row
It is connected between the upper surface of water plate 13 with the horizontal draining board 14 of high water-permeability plastics, the horizontal draining board 14 is horizontal to be laid with
In the upper surface of vertical short drain bar 13, geotextile layer 16, upper geotextile layer 16 are equipped with above the horizontal draining board 14
Top is equipped with two layers of vacuum sealing film 17, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, under lower layer's vacuum sealing film
It is embedded with vacuum meter, two layers of vacuum sealing film, 17 surrounding is excavated with press mold ditch 18, and press mold ditch 18 is returned with silt clay
It fills out.
Vertically long drain bar 12 and vertical short drain bar 13 in the present invention are in matrix equidistantly distributed, particularly often
A square is constituted between the vertically long drain bar 12 of row, then square center position is inserted with vertical short drain bar
13, thus constitute one it is quincunx so that center position vertically short drain bar 13 to periphery vertically long drain bar 12 away from
From equal, blowing-filling sludge superficial layer non-uniform phenomenon is advantageously reduced in this way, is conducive to the processing herein for avoiding the later period, to subtract
Time cost and fund input cost again are lacked.
Inventive principle
Saturated dredger soft soil is usually to flow mud~mud scum, and surface layer is almost slime water, has particle carefully uneven, High water cut
Rate, high-ductility, high-compressibility and extremely low intensity.A large amount of sampling tests of the blast-filled ground after 1 month~3 months show that it contains
Water rate highest in 0.5m~2.0m gradually decreases down up to 110%~150%；Vane shear strength (Cu value) 0.5m~
It is 0 in 2.0m, is gradually increased to 2kpa~5kpa down.This is because blowing-filling sludge early stage falls phenomenon caused by silt process.
When being handled using directly discharging type vacuum prepressing, the infiltration that is generated in the High water cut soil body due to the suction of negative pressure of vacuum
Power makes clay migrate and be gradually attached on drain bar outer membrane to drain bar, thickeies unite in row over time and constantly
" earth pillar " is formed around water plate, and the Free water except " earth pillar " is prevented to suck in vertical drain bar, makes the soil between drain bar
Body cannot further discharging consolidation and to eventually lead to basement process uneven.
Many digging in-situs experiments have shown that, the length of " earth pillar " is generally in 1.5m~1.6m, in the up big and down small ellipse that falls
Cone shape, upper end diameter 0.5m~0.6m, such as to drain plate spacing as 0.8m, " earth pillar " upper end spacing is 0.2m~0.3m, is blown
Filling out earth pillar depth when mud depth is 1.0m is 0.4m~0.6m, and earth pillar is 0.8m when blowing-filling sludge depth is 1.5m~1.6m,
Soil body range between " earth pillar " is that treated weak band, place shows as strong, weak alternate inhomogeneities.1.5m~
For 1.6m or less drain bar generally without clay attachment phenomenon, weak soil discharging consolidation is substantially uniform, and deep intensity is higher than superficial part.For
For blowing-filling sludge place, the purpose of superficial processing is to form the working face further constructed, the influence of general construction equipment
Depth is 2m~3m, and processing intent is not achieved due to this place surface layer caused by " earth pillar " phenomenon is inhomogenous.Therefore it eliminates
Directly discharging type vacuum prepressing and form " earth pillar " phenomenon with very direct engineering significance.In order to eliminate within 2m depth because in line
Formula vacuum preloading and the place non-uniform phenomenon generated, prevent the generation of " earth pillar ", the present invention is artificial downwards from lower geotextile layer
It is inserted with vertically long drain bar and vertical short drain bar, according to the combination of vertically long drain bar and vertical short drain bar, strengthens table
The consolidation of mud and control clay are in drain bar (vertically long drain bar and vertical short drain bar) top formation " earth pillar " in layer 2m
Quick uniform processing.The present invention uses vertically long drain bar and vertical short drain bar, vertically long drain bar and vertical short draining
The corresponding vacuum pump one of plate and vacuum pump two control vertically long drain bar by different vacuum pump one and vacuum pump two
With the evacuated time of vertical short drain bar, to realize outside the barged-in fill discharging consolidation of different designs depth, emphasis improves surface layer
The intensity of mud within 2m；Open vacuum pump precompressed → stop the true of vertical short drain bar simultaneously with first vacuum pump one and vacuum pump two
Sky pump two, the vacuum pump one for only starting vertically long drain bar carry out the vacuum pump one of the vertically long drain bar of vacuum preloading → stop, only
Open two vacuum preloading of vacuum pump of vertical short drain bar.Clay can be promoted in the vacuum preloading initial stage by such step
It is synchronous to drain compression concretion between vertically long drain bar and vertical short drain bar, it prevents from generating " earth pillar " on surface layer and keeps 2m deep
The soil body in degree is strengthened processing because moisture content is high, intensity is low.Due to inciting somebody to action vertical short drain bar upper surface with high water-permeability
The horizontal draining board (pipe) of plastics carries out horizontal connection, and the surface layer High water cut mud between vertically long drain bar can be made quickly to be discharged
Free water reduces or prevents surface layer clay to migrate and be attached to outside vertically long drain bar and vertical short drain bar to vertical displacement hull
On layer filter membrane, prevents " earth pillar " from being formed, improve the uniformity for the treatment of, be conducive to the secondary treatment for avoiding the later period, to subtract
Time cost and fund input cost again are lacked.
Beneficial effects of the present invention:
1) present invention blowing-filling sludge upper surface to be processed is equipped with lower geotextile layer, manually plugs downwards from lower geotextile layer
There are vertically long drain bar and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, institute
It states in the original place base under the insertion depth to blowing-filling sludge to be processed of vertically long drain bar, the adjacent vertically long drain bar is logical
It crosses long slab directly discharging type vacuum pipe to be connected, each long slab directly discharging type vacuum pipe is connected with vacuum pump one, and adjacent is described vertical
Straight short drain bar is connected by short slab directly discharging type vacuum pipe, and each short slab directly discharging type vacuum pipe is connected with vacuum pump two,
It is connected between the upper surface of the vertical short drain bar with the horizontal draining board of high water-permeability plastics, the horizontal draining board water
Tiling is located at the upper surface of vertical short drain bar, is equipped with geotextile layer above the horizontal draining board, in upper geotextile layer
Side is equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, buries under lower layer's vacuum sealing film
There is vacuum meter, two layers of vacuum sealing film surrounding is excavated with press mold ditch, and press mold ditch is backfilled with silt clay, on the one hand ties
Structure is simple, convenient to carry out, on the other hand eliminates the field that depth is generated by directly discharging type vacuum prepressing within 2m so as to realize
Ground non-uniform phenomenon avoids the generation of " earth pillar (native stake) "；
2) present invention passes through while starting vacuum pump one and vacuum pump two carries out vacuum preloading, passes through above-mentioned vacuum sealing film
Under inbuilt vacuum meter reach 80kpa or more and stablize 15 days~20 days；Vacuum pump two is closed, vacuum pump one is continued to run 15
It~20 days, it is then shut off vacuum pump one；Finally start vacuum pump two, stops after the vacuum pump two is run 7 days~10 days
Reach design requirement, the reinforcing of blowing-filling sludge recently can be rapidly completed in 45 days~50 days using the present invention, to reduce
Time cost and fund input cost again, are also prevented from surface layer and generate " earth pillar (native stake) " phenomenon, be also beneficial to make high-moisture percentage
Mud obtains uniform treatment, is also beneficial to avoid the secondary treatment in later period.
Claims (5)
1. a kind of blowing-filling sludge superficial layer Quick uniform processing method, blowing-filling sludge to be processed recently are located on the base of original place,
It is characterized in that including the following steps:
Step 1, blowing-filling sludge upper surface to be processed are equipped with lower geotextile layer, are manually inserted with downwards from lower geotextile layer vertical
Straight long drain bar and vertical short drain bar, vertically long drain bar and vertical short drain bar are in matrix equidistantly distributed, described to hang down
In original place base under the insertion depth to blowing-filling sludge to be processed of straight long drain bar, the adjacent vertically long drain bar passes through length
Plate directly discharging type vacuum pipe is connected, and each long slab directly discharging type vacuum pipe is connected with vacuum pump one, and adjacent is described vertical short
Drain bar is connected by short slab directly discharging type vacuum pipe, and each short slab directly discharging type vacuum pipe is connected with vacuum pump two, described
It is connected between the upper surface of vertical short drain bar with the horizontal draining board of high water-permeability plastics, the horizontal draining board level paving
It is located at the upper surface of vertical short drain bar, geotextile layer, paving above upper geotextile layer are equipped with above the horizontal draining board
Equipped with two layers of vacuum sealing film, i.e. upper layer vacuum sealing film and lower layer's vacuum sealing film, it is embedded under lower layer's vacuum sealing film true
Empty table, two layers of vacuum sealing film surrounding are excavated with press mold ditch, and press mold ditch is backfilled with silt clay；
Step 2: starting vacuum pump one and the progress vacuum preloading of vacuum pump two simultaneously, by inbuilt under above-mentioned vacuum sealing film
Vacuum meter reaches 80kpa or more and stablizes 15 days~20 days；
Step 3: closing vacuum pump two, vacuum pump one is continued to run 15 days~20 days, vacuum pump one is then shut off；
Step 4: starting vacuum pump two, the vacuum pump two stop vacuumizing after running 7 days~10 days, reach design requirement.
2. a kind of blowing-filling sludge superficial layer Quick uniform processing method recently as described in claim 1, which is characterized in that the step
Vertically long drain bar and vertical short drain bar use the plastic draining board of SPB-B type in rapid one.
3. a kind of blowing-filling sludge superficial layer Quick uniform processing method recently as described in claim 1, which is characterized in that the step
Spacing in rapid one between the long drain bar of neighboring vertical presses 0.8m~0.9m.
4. a kind of blowing-filling sludge superficial layer Quick uniform processing method recently as described in claim 1, which is characterized in that the step
Vertical short drain bar is inserted into 1.5m~2.0m in blowing-filling sludge to be processed in rapid one.
5. a kind of blowing-filling sludge superficial layer Quick uniform processing method recently as described in claim 1, which is characterized in that the step
High water-permeability plastics c-type drain bar can be used or using permeable, gas permeability in the horizontal draining board of high water-permeability plastics in rapid one
The replacement of circular wave chimney filter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107663857A (en) * | 2017-10-26 | 2018-02-06 | 三峡大学 | The device and method of mud moisture content is reduced using wick principle |
| CN109295969A (en) * | 2018-08-24 | 2019-02-01 | 温州大学 | The construction technology of different length drain bar series turbocharging vacuum pre-pressed soft soil foundation |
| CN113605359B (en) * | 2021-08-13 | 2022-06-21 | 中冶集团武汉勘察研究院有限公司 | Multilayer complex soft soil foundation rapid dewatering consolidation construction structure and construction method |
| CN114960608B (en) * | 2022-03-22 | 2023-08-22 | 温州大学 | Alternating bidirectional vacuum preloading consolidation method |
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