CN205475195U - Bloated joint vacuum preloading ground processing apparatus of bandlet side - Google Patents

Bloated joint vacuum preloading ground processing apparatus of bandlet side Download PDF

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Publication number
CN205475195U
CN205475195U CN201620152342.XU CN201620152342U CN205475195U CN 205475195 U CN205475195 U CN 205475195U CN 201620152342 U CN201620152342 U CN 201620152342U CN 205475195 U CN205475195 U CN 205475195U
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CN
China
Prior art keywords
bandlet
membrane
bedding course
sand bedding
plastics
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201620152342.XU
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Chinese (zh)
Inventor
陈富
张健
刘爱民
曹永华
李彪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CCCC First Harbor Engineering Co Ltd
Tianjin Port Engineering Institute Ltd of CCCC Frst Harbor Engineering Co Ltd
Tianjin Harbor Engineering Quality Inspection Center Co Ltd
Original Assignee
CCCC First Harbor Engineering Co Ltd
Tianjin Port Engineering Institute Ltd of CCCC Frst Harbor Engineering Co Ltd
Tianjin Harbor Engineering Quality Inspection Center Co Ltd
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Filing date
Publication date
Application filed by CCCC First Harbor Engineering Co Ltd, Tianjin Port Engineering Institute Ltd of CCCC Frst Harbor Engineering Co Ltd, Tianjin Harbor Engineering Quality Inspection Center Co Ltd filed Critical CCCC First Harbor Engineering Co Ltd
Priority to CN201620152342.XU priority Critical patent/CN205475195U/en
Application granted granted Critical
Publication of CN205475195U publication Critical patent/CN205475195U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a bloated joint vacuum preloading ground processing apparatus of bandlet side sets up the sand bedding course in construction region top, sets up the seal membrane at the upper surface of sand bedding course, beats in construction region and establishes plastics drain bar and plastics bandlet, buries the chimney filter in the sand bedding course underground to link to each other plastics drain bar and chimney filter, a chimney filter and a membrane device link to each other, go out the membrane device and link to each other through first connecting pipe and jet pump, bury the gas injection pipe underground in the sand bedding course to continuous with the gas injection pipe with the plastics bandlet, the gas injection is managed with a membrane device continuously, and play membrane device passes through the second connecting pipe and air compressor links to each other, sets up the press mold ditch around construction region, sets up clay sealing wall in the below of press mold ditch, uses the clay compaction in the seal membrane four sides shop income press mold ditch. The construction at the beginning starts jet pump and air compressor, carries out the evacuation and to filling gas in the plastics bandlet to construction region to make the plastics bandlet produce the side and expand, produce the squeezing action to the periphery. The utility model discloses technical scheme is applied to soft soil foundation reinforcement, and the bandlet side expands and can produce the crack and accelerate the soil body and concrete, and the foundation bearing capacity of high pressure heater after solid is further carried to the additional load to the level of applying, can reach more than the 80kPa.

Description

Bandlet side is swollen combined vacuum precompressed basement process device
Technical field
This utility model belongs to field of civil engineering method for processing foundation, the particularly swollen combined vacuum in bandlet side precompressed ground Processing means and method.
Background technology
Vacuum preloading is a kind of wide variety of soft soil foundation reinforcing method, especially has in terms of processing deep weak clay Unique advantage.Vacuum method is proposed by the W Kjellman of geological institute of imperial family of Sweden the earliest, introduction of authors five Group site test results, and propose the theoretical explanation of vacuum preloading.Hereafter, vacuum preloading research work slower development. China is in 20th century 50~the sixties, and commensurate has not carried out the work of exploration respectively, but in theoretical and engineering practice side Face all there is no bigger breakthrough.Starting from 1980, Tianjin bay work (is handed over by Hang Ju scientific research institution of Ministry of Communications one in existing Academy company limited) carry out large-area on-the-spot test, and combine with University Of Tianjin and carried out laboratory test and theory Research.Tentatively understood fully the consolidation mechanism of vacuum preloading, and investigated suitable vacuum extractor (jet pump) and Cover the critical processes such as diaphragm seal, and achieve national inventing patent.Hereafter in order to obtain higher foundation bearing capacity, hand over Logical Bu Yihangju scientific research institution has invented vacuum combined stack-load method for processing foundation on the basis of vacuum method.Send out in recent years Bright supercharged vacuum precompressed and air pressure splitting vacuum preloading are difficult to control to gases at high pressure extend influence vacuum etc. owing to existing A difficult problem, consolidation effect fails to obtain bigger raising.
Substantial amounts of vacuum preloading engineering shows, vacuum preloading is a kind of efficient and rational soft-soil foundation treatment method, but exists Two problems.First is restriction vacuum pre-press reinforcing groundwork characteristic load bearing capacity about about the 80kPa due to atmospheric pressure, Can not improve further;Though vacuum combined stack-load method can improve foundation bearing capacity further, but it is obtained by heap material containing and fortune Defeated restriction, costly, simultaneously for ensureing that the soil body does not destroys, needs controlled loading speed, affects work during preloading Phase.Second is relatively slow for the less Clay Consolidation speed of infiltration coefficient, needs the longer pumpdown time, and the electricity charge etc. take With higher, affect the duration.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, it is provided that bandlet side is swollen combined vacuum precompressed basement process Apparatus and method, are applied to reinforced soft soil ground, and bandlet side is swollen produces crack quickening soil solidifying, applies level to attached Loading carries and improves the foundation bearing capacity after reinforcing further.
Technical purpose of the present utility model is achieved by following technical proposals:
Bandlet side is swollen combined vacuum precompressed basement process device, is provided above sand bedding course at construction area, in construction area Set plastic draining board and plastics bandlet, in construction area, bury monitoring instrument underground;Chimney filter is buried underground in sand bedding course, and will Plastic draining board is connected with chimney filter, and chimney filter is connected with membrane device;Membrane device is connected with jet pump by the first connecting tube, Form the pumping channel from plastic draining board chimney filter membrane device the first connecting tube jet pump;Sand bedding course buries If air injection pipe, and plastics bandlet is connected with air injection pipe, air injection pipe is connected with membrane device, and membrane device is by second even Adapter is connected with air compressor, is formed from air compressor the-the second connecting tube-membrane device-air injection pipe-Flat plastic The loading line of band;Upper surface at sand bedding course arranges diaphragm seal, and the surrounding at construction area arranges press mold ditch, at press mold The lower section of ditch arranges wax wall, and diaphragm seal four limit spreads in press mold ditch and is compacted with clay.
In technique scheme, plastic draining board is arranged according to square;Plastics bandlet enters also according to square Row is arranged, the spacing of plastics bandlet is 1-2 times of plastic draining board spacing, and plastics bandlet is positioned at four plastic draining boards The foursquare center surrounded.
In technique scheme, described monitoring instrument is pore pressure gauge, delaminating deposition or level of ground water pipe
In technique scheme, chimney filter uses PVC (polrvinyl chloride) corrugated tubing, and caliber 63mm, ring stiffness is more than 6kN/m2, chimney filter is pressed the punching of 20mm spacing total length, and is twined outward 2~3 metafiltration cloth.
In technique scheme, membrane device is fixed by upper and lower two ring flanges, and is fixed on up and down by diaphragm seal Between two ring flanges, tighten upper and lower two ring flanges by four screw rods air tight to ensure, select in upper and lower two methods Arranging rubber blanket between blue dish, upper lower flange forms path, and lower flange is connected with four-way base, and four-way base is used for It is connected with chimney filter or the air injection pipe of distribution in sand bedding course.
In technique scheme, air injection pipe selects plastic tube, and the most embedded steel wire is as the PVC (polrvinyl chloride) of skeleton Flexible pipe, caliber 50mm.
In technique scheme, for convenience of connecting, four-way connection (preferably hard PVC pipe) is used to connect plastics bandlet And air injection pipe, and iron wire is used to be fixed.
In technique scheme, press mold trench depth is 1.0~2.0m.
In technique scheme, the width of wax wall is not less than 1.2m, and entering the impermeable stratum degree of depth is 1.0-1.2m, The clay content of mix back wall should be greater than 15%, and infiltration coefficient is not more than 1 × 10-5cm/s。
In technique scheme, in construction area, plastic draining board is consistent with the depth of burying of plastics bandlet.
In technique scheme, in sand bedding course, air injection pipe is positioned at the either above or below of chimney filter.
In technique scheme, in sand bedding course, residing for air injection pipe, the distance of horizontal level distance sand bedding course upper surface is / 4th of sand bedding course thickness arrive half.
In technique scheme, in sand bedding course, residing for chimney filter, the distance of horizontal level distance sand bedding course upper surface is sand / 3rd of cushion thickness arrive half.
In technique scheme, the first connecting tube is identical with the material of the second connecting tube, all can use embedded steel wire conduct PVC (polrvinyl chloride) flexible pipe of skeleton.
Construction starts, and starts jet pump, utilizes plastic draining board chimney filter membrane device the first connecting tube jet pump Pumping channel construction area is carried out evacuation;Start air compressor simultaneously, utilize air compressor second to connect Loading line insufflation gas in plastics bandlet of pipe membrane device air injection pipe plastics bandlet, so that plastics bandlet produces Raw side is swollen, and periphery is produced squeezing action.
During whole precompressed, jet pump unlatching rate is not less than 80%, and under-membrance vacuum degree requires to reach more than 85kPa, takes out Water (evacuation) is carried out continuously 80 100 days, and every day is 24 hours;High-pressure gas pressure is 0.3~0.5MPa, uses The mode that continuous or interval is inflated, carries out 80 100 days, and every day is 24 hours.
In whole construction period, utilize the monitoring instrument buried underground to carry out the monitoring of construction progress and quality, determine discharge time. After unloading, disconnect the first connecting tube and membrane device and the second connecting tube and membrane device, remove diaphragm seal, membrane Device, sand bedding course and wherein air injection pipe and chimney filter, be retained in plastics bandlet and plastic draining board in construction area, uses Construction area is processed by vibroroller cmpacting, to eliminate the space after plastics bandlet expands.
This utility model uses plastics bandlet and plastic draining board to coordinate, and makes plastics bandlet side by injecting gases at high pressure Swollen, apply lateral load to the soil body, carry out draining by plastic draining board.On the one hand, according to small hole expansion theory, mould Material bandlet side is swollen can make the soil body produce the crack of horizontal radiation shape, increases horizontal osmotic coefficient and the coefficient of consolidation further, Accelerate soil body horizontal to consolidation.The biggest crack can form a certain amount of horizontal row water surface, shortens between vertical drainage Away from, accelerate the vertical consolidation of the soil body.On the other hand, plastics bandlet side is swollen adds level to additional load to the soil body, carries Foundation bearing capacity after high reinforcing;Top layer can be made by vibroroller cmpacting to eliminate the space after plastics bandlet expands after unloading Foundation bearing capacity is further enhanced.In a word, compared with prior art, this utility model on the one hand swollen generation in bandlet side Soil body discharging consolidation is accelerated in crack;On the other hand applying level foundation bearing capacity after additional load improves reinforcing further. This utility model can improve efficiency of construction, saves expense, reduction of erection time.
Accompanying drawing explanation
Fig. 1 is the distribution schematic diagram (top view) of plastics bandlet and plastic draining board in technical solutions of the utility model, wherein 2 For plastic draining board, 3 be plastics bandlet.
Fig. 2 is the schematic diagram of this utility model bandlet side swollen combined vacuum precompressed basement process device, and wherein 1 is sand bedding course, 2 For plastic draining board, 3 is plastics bandlet, and 4 is monitoring instrument, and 5 is chimney filter, and 6 is membrane device, and 7 is air injection pipe, 8 For four-way connection, 91 is the first connecting tube, and 92 is the second connecting tube, and 10 is air compressor, and 11 is press mold ditch, 12 is diaphragm seal, and 13 is wax wall, and 14 is jet pump.
Fig. 3 is plastics bandlet in this utility model processing means, air injection pipe and four-way connection connection diagram, and wherein 3 is plastics Bandlet, 7 is air injection pipe, and 8 is four-way connection, and 15 is iron wire.
Fig. 4 is the structural representation of membrane device in this utility model processing means, and wherein 12 is diaphragm seal, and 16 is upper flange plate, 17 is four-way base, and 18 is bolt, and 19 is rubber blanket, and 20 is lower flange.
Detailed description of the invention
The technical solution of the utility model is further illustrated below in conjunction with specific embodiment.
As a example by the region of 10,000 square metres of length and width 100m × 100m, smooth location, and sand bedding course is laid on earth's surface, Using medium coarse sand to carry out sand bedding course setting, thickness can be 40~50cm, and infiltration coefficient is more than 1 × 10-2cm/s。
Plastic draining board and plastics bandlet is set: according to the interplanar spacing cloth of plastic draining board in the region of 10,000 square metres Putting, use board-plugging device that plastic draining board sets projected depth, plastic draining board uses Type B plastic draining board, sets During avoid plastic draining board wrench to pollute;Arrange according to the interplanar spacing of plastics bandlet, use board-plugging device by Flat plastic Band sets projected depth, and plastics bandlet uses PE material high intensity Flexible water pipe (i.e. polyethylene Flexible water pipe), unswollen state Width 150mm, the heat bonding of bottom elder generation or the thin wire colligation of plastics bandlet make it air tight, set. When setting plastic draining board and plastics bandlet, select plastic draining board according to horizontal spacing 1m, longitudinal pitch 1m Square is configured, so that the distribution unit of the plastic draining board of four plastic draining board formation 1m × 1m, at plastics The centrally disposed plastics bandlet of draining board distribution unit, as shown in Figure 1.
In the region of 10,000 square metres, bury monitoring instrument underground, typically can use pore pressure gauge, delaminating deposition or ground Lower water level pipe, to realize monitoring constantly.
In sand bedding course, bury chimney filter underground, and wrench and the chimney filter colligation of plastic draining board are connected, chimney filter and membrane device phase Even;Membrane device is connected with jet pump by the first connecting tube, so, is formed to go out from plastic draining board chimney filter The evacuation passageway of film device the first connecting tube jet pump.Chimney filter uses PVC (polrvinyl chloride) corrugated tubing, caliber 63mm, ring stiffness is more than 6kN/m2, chimney filter is pressed the punching of 20mm spacing total length, and is twined outward 2~3 metafiltration cloth.Membrane fills Put employing existing structure, upper and lower two ring flanges be fixed, and diaphragm seal is fixed between upper and lower two ring flanges, Tighten upper and lower two ring flanges by four screw rods air tight to ensure, select to arrange rubber between upper and lower two ring flanges Pad, upper lower flange forms path, and lower flange is connected with four-way base, and four-way base is used for and distribution in sand bedding course Chimney filter is connected.
Burying air injection pipe in sand bedding course underground, and be connected with air injection pipe by plastics bandlet, air injection pipe is connected with membrane device, goes out Film device is connected with air compressor by the second connecting tube, so, is formed from air compressor the second connecting tube The loading line of membrane device air injection pipe plastics bandlet;Membrane device selects existing structure, with formation evacuation passageway Membrane device identical;Air injection pipe select plastic tube, the most embedded steel wire as PVC (polrvinyl chloride) flexible pipe of skeleton, Caliber 50mm;For convenience of connecting, four-way connection (preferably hard PVC pipe) is used to connect plastics bandlet and air injection pipe, And use iron wire to be fixed so that it is air tight.
Upper surface at sand bedding course arranges diaphragm seal, and diaphragm seal selects 2~3 layers of polyethylene or polyvinyl chloride films, or root Need by factory's once hot pressing according to construction.
Surrounding at construction area (i.e. stabilization zone) arranges press mold ditch, and diaphragm seal four limit spreads in press mold ditch and re-uses clay Backfill, press mold trench depth is 1.0~2.0m.Surrounding at construction area (i.e. stabilization zone) arranges wax wall, clay Envelope wall width is not less than 1.2m, enters the impermeable stratum degree of depth about 1.0m, and the clay content of mix back wall should be greater than 15%, Infiltration coefficient is not more than 1 × 10-5Cm/s, wax wall is arranged on the lower section of press mold ditch.
In above-mentioned setting, in stabilization zone, plastic draining board is consistent with the depth of burying of plastics braid.
In above-mentioned setting, in sand bedding course, air injection pipe is positioned at the either above or below of chimney filter.
In above-mentioned setting, in sand bedding course, residing for air injection pipe, the distance of horizontal level distance sand bedding course upper surface is sand pad / 4th of layer thickness arrive half.
In above-mentioned setting, in sand bedding course, residing for chimney filter, the distance of horizontal level distance sand bedding course upper surface is sand bedding course / 3rd of thickness arrive half.
In above-mentioned setting, the first connecting tube is identical with the material of the second connecting tube, can all select embedded steel wire as skeleton PVC (polrvinyl chloride) flexible pipe.
During burying into said structure underground, after connecting loading line, start air compressor, check whole height Body conveying system of calming the anger whether good seal, remedies air leak position in time;After passed examination, the second connecting tube is filled with membrane Put and take apart, then carry out plastic film mulch installation.
When constructing, air compressor requires that maximum pressure at expulsion is not less than 0.5MPa.Jet pump power is not less than 7.5kW, and the vacuum pressure not less than 0.096MPa can be formed.
Construction starts, and starts jet pump, utilizes plastic draining board chimney filter membrane device the first connecting tube jet pump Pumping channel construction area is carried out evacuation process, start air compressor simultaneously, utilize air compressor second Loading line insufflation gas in plastics bandlet of connecting tube membrane device air injection pipe plastics bandlet, so that Flat plastic It is swollen that band produces side, and periphery is produced squeezing action.
During whole precompressed, jet pump unlatching rate is not less than 80%, and under-membrance vacuum degree requires to reach more than 85kPa, takes out Water (evacuation) can be carried out continuously 80 100 days, and every day is 24 hours;High-pressure gas pressure is 0.3~0.5MPa, adopts By the continuous or mode of interval inflation, carrying out 80 100 days, every day is 24 hours.
In whole construction period, utilize the monitoring instrument buried underground to carry out the monitoring of construction progress and quality, determine discharge time. After unloading, disconnect the first connecting tube and membrane device and the second connecting tube and membrane device, remove diaphragm seal, membrane Device, sand bedding course and wherein air injection pipe and chimney filter, be retained in plastics bandlet and plastic draining board in construction area, uses Construction area is processed by vibroroller cmpacting, to eliminate the space after plastics bandlet expands.
After construction terminates, fetch earth ground and test and carry out laboratory soil test, vane-shear strength is tested and existing Field load test, is evaluated basement process consolidation effect, and result display consolidation effect meets construction requirement, and vacuum is pre- Pressure reinforces groundwork characteristic load bearing capacity averagely up to more than 80kPa.
Above this utility model is done exemplary description, it should explanation, without departing from core of the present utility model In the case of, any simple deformation, amendment or other those skilled in the art can not spend creative work etc. Protection domain of the present utility model is each fallen within replacing.

Claims (10)

1. the swollen combined vacuum in bandlet side precompressed basement process device, it is characterised in that be provided above sand bedding course at construction area, sets plastic draining board and plastics bandlet in construction area, buries monitoring instrument in construction area underground;Burying chimney filter in sand bedding course underground, and be connected with chimney filter by plastic draining board, chimney filter is connected with membrane device;Membrane device is connected with jet pump by the first connecting tube, forms the pumping channel from plastic draining board chimney filter membrane device the first connecting tube jet pump;Air injection pipe is buried underground in sand bedding course, and plastics bandlet is connected with air injection pipe, air injection pipe is connected with membrane device, and membrane device is connected with air compressor by the second connecting tube, forms the loading line from air compressor the second connecting tube membrane device air injection pipe plastics bandlet;Upper surface at sand bedding course arranges diaphragm seal, and the surrounding at construction area arranges press mold ditch, arranges wax wall in the lower section of press mold ditch, and diaphragm seal four limit spreads in press mold ditch and is compacted with clay.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that plastic draining board is arranged according to square;Plastics bandlet is arranged also according to square, and the spacing of plastics bandlet is 12 times of plastic draining board spacing, and plastics bandlet is positioned at the foursquare center that four plastic draining boards surround.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that described monitoring instrument is pore pressure gauge or level of ground water pipe;Use four-way connection to connect plastics bandlet and air injection pipe, and use iron wire to be fixed.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterized in that, membrane device is fixed by upper and lower two ring flanges, and diaphragm seal is fixed between upper and lower two ring flanges, tightening upper and lower two ring flanges by four screw rods, arrange rubber blanket between upper and lower two ring flanges, upper lower flange forms path, lower flange is connected with four-way base, and four-way base is for being connected with chimney filter or the air injection pipe of distribution in sand bedding course.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that chimney filter uses polrvinyl chloride corrugated tubing, caliber 63mm;Air injection pipe selects embedded steel wire as the polyvinyl chloride hose of skeleton, caliber 50mm;First connecting tube and the second connecting tube all use embedded steel wire as the polyvinyl chloride hose of skeleton.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that press mold trench depth is 1.0~2.0m;The width of wax wall is not less than 1.2m, and entering the impermeable stratum degree of depth is 1.0 1.2m.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that in construction area, plastic draining board is consistent with the depth of burying of plastics bandlet.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that in sand bedding course, air injection pipe is positioned at the either above or below of chimney filter.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that in sand bedding course, residing for air injection pipe, distance is sand bedding course thickness 1/4th of horizontal level distance sand bedding course upper surface to half.
Bandlet side the most according to claim 1 swollen combined vacuum precompressed basement process device, it is characterised in that in sand bedding course, residing for chimney filter, distance is sand bedding course thickness 1/3rd of horizontal level distance sand bedding course upper surface to half.
CN201620152342.XU 2016-02-29 2016-02-29 Bloated joint vacuum preloading ground processing apparatus of bandlet side Expired - Fee Related CN205475195U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105603963A (en) * 2016-02-29 2016-05-25 中交天津港湾工程研究院有限公司 Flat belt lateral swelling combined vacuum pre-pressing foundation processing device and method
CN106284277A (en) * 2016-08-22 2017-01-04 南京新都地下工程研究院有限公司 A kind of air sac pressing draining combined vacuum precompressed foundation reinforcement method
CN109680670A (en) * 2018-12-19 2019-04-26 深圳亚纳海洋科技有限公司 The soil body based on static sounding does not consolidate undrained strength calculation method and system
CN110984117A (en) * 2019-11-25 2020-04-10 浙江大学 Device and method for soft soil foundation treatment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105603963A (en) * 2016-02-29 2016-05-25 中交天津港湾工程研究院有限公司 Flat belt lateral swelling combined vacuum pre-pressing foundation processing device and method
CN106284277A (en) * 2016-08-22 2017-01-04 南京新都地下工程研究院有限公司 A kind of air sac pressing draining combined vacuum precompressed foundation reinforcement method
CN109680670A (en) * 2018-12-19 2019-04-26 深圳亚纳海洋科技有限公司 The soil body based on static sounding does not consolidate undrained strength calculation method and system
CN109680670B (en) * 2018-12-19 2020-09-25 深圳亚纳海洋科技有限公司 Static sounding-based soil body unconsolidation and non-drainage strength calculation method and system
CN110984117A (en) * 2019-11-25 2020-04-10 浙江大学 Device and method for soft soil foundation treatment
US11085161B2 (en) 2019-11-25 2021-08-10 Zhejiang University Device and method for treating soft soil foundations

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Granted publication date: 20160817

Termination date: 20200229