CN108824113A - A kind of soft-soil foundation treatment method - Google Patents

A kind of soft-soil foundation treatment method Download PDF

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Publication number
CN108824113A
CN108824113A CN201810806661.1A CN201810806661A CN108824113A CN 108824113 A CN108824113 A CN 108824113A CN 201810806661 A CN201810806661 A CN 201810806661A CN 108824113 A CN108824113 A CN 108824113A
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China
Prior art keywords
layer
soft
soil foundation
vertical drainage
drainage pipeline
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CN201810806661.1A
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Chinese (zh)
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CN108824113B (en
Inventor
高辉
刘志建
李敬
陈辉艳
赵磊
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Sichuan Rui Tong Engineering Construction Group Co Ltd
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Sichuan Rui Tong Engineering Construction Group Co Ltd
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Priority to CN201810806661.1A priority Critical patent/CN108824113B/en
Publication of CN108824113A publication Critical patent/CN108824113A/en
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Publication of CN108824113B publication Critical patent/CN108824113B/en
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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C3/00Foundations for pavings
    • E01C3/04Foundations produced by soil stabilisation
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/02Improving by compacting
    • E02D3/10Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains

Abstract

The invention discloses a kind of soft-soil foundation treatment methods, include the following steps:Ground treatment;Plug vertical drainage pipeline and vacuum exhaust line, installation drainpipe and vacuum pump;Covering sealing film, vacuumizes and drains;Sealing film and vacuum pump are removed, is in the milk into vertical drainage pipeline;Quick lime is filled in the cavity left after grouting liquid condensation to vertical drainage pipeline, is finally bound again using dry soil property backfill.The present invention passes through above-mentioned setting, using vertical drainage pipeline under vacuum conditions by dehydration, the middle layer moisture of soft soil foundation can be excluded substantially completely, again by carrying out grouting treatment to soft soil foundation bottom, on the one hand reinforcement processing is carried out to the ground of deep layer, on the other hand the upward permeation pathway of moisture is hindered, reduce adverse effect of the moisture to roadbed, quick lime is embedded at the shallow-layer of soft soil foundation simultaneously, also the moisture of shallow-layer can be fully absorbed, so that the moisture exclusion of soft soil foundation soil body entirety is more complete.

Description

A kind of soft-soil foundation treatment method
Technical field
The present invention relates to technical field of road construction, in particular to a kind of soft-soil foundation treatment method.
Background technique
Roadbed treatment is particularly important part in road construction, most important on the influence of the quality of entire road, very much Road does not pay attention to the effect of roadbed in During Initial Stage Construction completely, and the road appearance for causing the later period to be completed is various to be broken, expands, collapsing Engineering accident seriously affects the quality of entire road engineering.
It is well known that roadbed is the stress supporting body of road, need to carry dead load on road, dynamic load and various Shear stress, therefore the strength and stability of roadbed itself is of crucial importance.For guarantee roadbed intensity and stabilization, in addition to selection close The roadbed filling of lattice and outside being constructed by specification, the processing to soft soil foundation are also can not be ignored an important factor for, and The factor of soft soil roadbed self-strength is influenced in construction at present in addition to the gap on roadbed treatment, there are also more important shadows The factor of sound is corrosion function of the moisture to roadbed.
A kind of vacuum preloading roadbed treatment dress is disclosed in the Chinese patent document that application publication number is CN104264559A It sets and its construction method, device includes horizontal row water body, the vertical drainage body being arranged in soft base, vacuum pressed system, wherein Vertical drainage body includes plastic draining board, and the partial region laying sealing material of plastic draining board seals drain bar.Pass through setting Vertical drainage plate enable moisture that the soil body is discharged from bottom to top, to reinforce the intensity of roadbed, reduce moisture to roadbed Corrosion function.
But as described in above scheme, plastic draining board can inevitably be hindered with well when vertical direction drains Effect, i.e., more the plastic draining board of depths drain function reduce it is more, often lead to the depth of the Soft Ground of roadbed Spend limited, settlement after construction is larger and the secondary consolidation time is long, is unfavorable for the stabilization of roadbed.Therefore it also needs to propose to be more conducive to subtracting Technical solution of few moisture to roadbed corrosion function.
Summary of the invention
The object of the present invention is to provide a kind of soft-soil foundation treatment methods, have and exclude to soft soil foundation soil body overall moisture More complete effect advantageously reduces corrosion function of the moisture to roadbed.
Above-mentioned technical purpose of the invention technical scheme is that, a kind of Soft Ground side Method includes the following steps:
S1, ground treatment, with clearing base table layer surface sundries;
S2 plugs vertical drainage pipeline and vacuum exhaust line, installation drainpipe and vacuum pump;
S3, covering sealing film persistently carry out vacuumize process and drain in time;
S4 removes sealing film and vacuum pump after ground surface layer upper surface is without the exudation of obvious moisture,
S5 carries out grouting operation into vertical drainage pipeline;
S6 waits for grouting liquid infiltration condensation quietly, then fills quick lime into vertical drainage pipeline after grouting to absolute altitude, finally use again Dry soil property backfill is bound.
By using above-mentioned technical proposal, using vertical drainage pipeline, Rainfall goes out under vacuum conditions, can will be soft The middle layer moisture of soil base excludes completely substantially, then by carrying out grouting treatment to soft soil foundation bottom, on the one hand to deep layer Ground carries out reinforcement processing, on the other hand hinders the upward permeation pathway of moisture, reduces adverse effect of the moisture to roadbed, together When quick lime is embedded at the shallow-layer of soft soil foundation, the moisture of shallow-layer can also be fully absorbed, so that the ground surface layer soil body Whole moisture excludes more complete.
The further setting of the present invention is:The vertical drainage duct bottom sealed set and including inner tube and jacket layer, Said inner tube is made of the core plate of multiple-layer stacked, and multiple tracks channel is formed between adjacent core plate, and the jacket layer is sheathed on interior The outer wall of pipe.
The further setting of the present invention is:The jacket layer is made of frictional layer and filter layer, and the frictional layer is hard Material is made and offers multiple permeable holes, and the frictional layer is fixedly connected on the bottom end of the vertical drainage pipe, and institute The interlayer formed between frictional layer and said inner tube for placing the filter layer is stated, the filter layer is knitted using water penetration geotechnique Object.
By using above-mentioned technical proposal, after vertical drainage pipeline is squeezed into the soft soil foundation soil body, vertical drainage pipeline It is capable of forming one of vertical water stream channel by squeezing, while vertical drainage pipeline includes that frictional layer, filter layer and inner tube are total Three layers of meter, filter layer is folded in interlayer, and filter medium of the moisture penetration into inner tube is served as in drainage procedure, prevents soil Equal impurity extract the permeable hole plug of inner tube in later period slip casting, then by filter layer, and slurries can be directly by permeable at this time Hole infiltrates into inside soil body, completes the effect of encapsulating.
The further setting of the present invention is:After the installation for completing vertical drainage pipeline in S2, spread in ground surface layer upper surface If permeating layer of sand, the vacuum exhaust line includes that the horizontal tube of connection and vertical pipe, the horizontal tube are embedded in infiltration layer of sand In, the vertical pipe is embedded in the soft soil foundation soil body, and the vacuum pump is connected on the horizontal tube.
By using above-mentioned technical proposal, the setting for permeating layer of sand enables to the moisture in dialysis that can smoothly arrange Out, horizontal tube is embedded in and is conducive to carry out vacuumize process to infiltration layer of sand in infiltration layer of sand.
The further setting of the present invention is:The sealing film covered in the S3 is the multilayer being successively laid with, the weak soil The surrounding of base has dug sealing ditch, and four edges of the sealing film are embedded in the sealing ditch.
By using above-mentioned technical proposal, four edges for sealing film are embedded in sealing ditch, and are taken certain close Envelope measure such as water seal etc. is conducive to hollow environment so that ground Surface mulch is formed the environment of five faces sealing by sealing film Formation and holding.
The further setting of the present invention is:When being operated in the S5 to vertical drainage duct grouting, first by filter layer from folder It is extracted out in layer;The permeable hole is obliquely installed along the length direction of vertical drainage pipeline upwards.
By using above-mentioned technical proposal, permeable hole is obliquely installed upwards along the length direction of vertical drainage pipeline, thus It will not be because of soil by permeable hole plug when squeezing into vertical drainage pipeline into the soft soil foundation soil body.
The further setting of the present invention is:When filling quick lime into vertical drainage pipeline in the S6, the life filled Amount of lime is the 1/4-1/3 of vertical drainage duct height.
By using above-mentioned technical proposal, quick lime has the effect of good absorption moisture, and moisture is with being precipitated weak soil It can be detained the long period in the shallow-layer soil body after the base soil body, often delaying on not casual labourer's phase be caused by a definite date to construction, if burying If crossing few effect for not having then and absorbing shallow-layer soil body moisture as early as possible, bury excessively, and is unfavorable for making for a long time after the completion of road surface Use stability.
The further setting of the present invention is:When carrying out vacuumize process in S3, vacuum pump continues after being connected on horizontal tube Vacuumize process is carried out, at handling duration 30-45 days, and last 10-15 days of handling duration, in the other end of the horizontal tube It is connected with air intake pump, the air intake pump pumps hot-air.
By using above-mentioned technical proposal, the processing time vacuumized should determine according to construction site actual condition, 30- 45 days are general process cycle, and hot-air is passed through within rear 1/3 time of handling duration, by the pumping process of vacuum pump Afterwards, heat can be brought into the soil body of each depth of soft soil foundation, achievees the effect that dry moisture as early as possible, with vertical drainage pipe Road forms complementation, compensates for the vertical drainage pipeline low disadvantage of phase dehydration rate after construction, and drying and processing is not yet It can be fixed against the development at soil layer internal crack or joint, worked well and broad covered area.
The further setting of the present invention is:After air intake pump is opened, vacuum pump, which increases, evacuates flow, maintains in soft soil foundation Reciprocal of duty cycle will not become smaller compared with before air intake pump unlatching.
By using above-mentioned technical proposal, in order to guarantee the effect of drying and processing, it is therefore necessary to guarantee certain air inflow, And it is also required to guarantee that vacuum degree is kept constant even more greatly, then must increase the flow of vacuum pump simultaneously.
In conclusion the invention has the advantages that:1)The side matched using vacuum method and vertical drainage pipeline The middle layer moisture that method facilitates soft soil foundation excludes more complete;2)Place is potted to the soft soil foundation bottom for completing draining Reason, on the one hand prevents the path of soft soil foundation inside soil body moisture permeated further up, on the other hand also functions to reinforcement The effect of soft soil foundation soil strength;3)The shallow-layer soil body can accelerate the suction of moisture in the shallow-layer soil body due to being embedded with quick lime Speed is received, the effect for absorbing shallow-layer soil body moisture can be also played in the long-time service of later period road.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the vertical drainage pipeline of the present embodiment;
Fig. 2 is the schematic cross-section of vertical drainage pipeline;
Fig. 3 is the schematic cross-section of two core plates in inner tube.
In figure:1, vertical drainage pipeline;2, frictional layer;3, filter layer;4, inner tube;5, permeable hole;6, core plate;7, permeable logical Road.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in this hair All by the protection of Patent Law in bright scope of the claims.
Embodiment, a kind of soft-soil foundation treatment method, including steps are as follows:
S1, ground treatment, with clearing base table layer surface sundries.For the ground surface layer of construction section, it should conscientiously handle, The leveling of ground surface layer, surface debris are cleared up in time, local sludge excavation, which is changed, fills out, and sets in advance on ground surface layer to be processed periphery Set gully.
The vertical drainage pipeline 1 that pre-production is completed is squeezed into the soft soil foundation soil body using machine, then vacuum is arranged by S2 Vertical pipe in feed channel is also squeezed into the soft soil foundation soil body, then installs the horizontal tube of vacuum exhaust line, will by horizontal tube All vertical pipes are connected to horizontal tube, and upper surface after the completion of horizontal tube and vertical pipe are respectively mounted on ground surface layer is laid with one layer Permeate layer of sand, general thickness 500-800mm.
As illustrated in fig. 1 and 2, vertical drainage pipeline 1 includes that inner tube 4, filter layer 3 and frictional layer 2 form, vertical drainage pipeline 1 bottom end is taper setting, is conveniently squeezed into the soft soil foundation soil body, and frictional layer 2 is made and is welded on bottom end using stainless steel, Multiple permeable holes 5 are offered on frictional layer 2, permeable hole 5 is obliquely installed upwards along the length direction of vertical drainage pipeline 1, so that When squeezing into vertical drainage pipeline 1 in the soil body downwards, soil will not be allowed to block permeable hole 5.
As shown in Figures 2 and 3, the bottom of inner tube 4 is also fixedly connected on the bottom end of vertical drainage pipeline 1, and inner tube 4 is by more The quilted plastic panel 6 that layer is overlapped mutually forms, and the section of quilted plastic panel 6 is multiple cross parallel connection shapes, shape between adj acent plastic core plate 6 The water-permeable passage 7 being precipitated upwards at multiple tracks moisture.
As illustrated in fig. 1 and 2, it is also installed with interlayer and between frictional layer 2 and inner tube 4, filtering is slidably connected in interlayer Layer 3, filter layer 3 are soft permeable geotextile, can effectively be carried out to the moisture inside dialysis to vertical drainage pipeline 1 Filtering reduces pollution of the impurity to inner tube 4.
Infiltration layer of sand covers vertical drainage pipeline 1, vertical pipe and horizontal tube, connects respectively at the both ends of horizontal tube at this time A sealing valve connecting pin is used after remaining out.
S3 starts covering sealing film.Multi-layer sealed film successively covered to infiltration layer of sand, at this time one end of horizontal tube Sealing valve connecting pin is pierced by sealing film and is connected with vacuum pump.Sealing ditch is dug along soft soil foundation surrounding outer rim to be processed, is sealed Trench depth is 2-3m, seal film membrane edge along sealing ditch inner wall vertically into ditch body and be laid in sealing ditch bottom of trench On, bottom of trench tiling, which has in the sealing ditch of sealing film, to be also backfilled at 1/2 height of ditch body using clay or mud, after the completion of backfill It carries out covering water process again and is filled until ditch will seal, form a water seal band of surrounding connection, so that sealing film for be processed The soft soil foundation soil body to be processed sealing as far as possible.
After the completion of sealing, starting vacuum pump carries out vacuumize process to soft soil foundation part to be processed, of course for reality When grasp the intracorporal barometric information of soft soil foundation soil, need to bury in the soft soil foundation soil body of different depth before being laid with sealant If baroceptor.After vacuumizing a period of time, moisture starts to be precipitated in infiltration layer of sand, can open in due course and be placed in sealing Water pump inside film extracts moisture out in time.
Vacuumize process generally continues 30-45 days, and specific duration should be according to live water quality and soft soil foundation soil body settling amount It determines, and in last 10-15 days vacuumized, it should which the other end sealing valve connecting pin of horizontal tube is connected with air inlet Pump, air intake pump pump hot-air into horizontal tube, and synchronization tunes up the flow of vacuum pump at this time, so that the vacuum inside sealing film Degree is not less than the vacuum degree before air intake pump unlatching.
S4, when ground surface layer is oozed out without obvious moisture, remove sealing film, vacuum exhaust line, drainpipe, air intake pump and Vacuum pump, then the filter layer 3 in vertical drainage pipeline 1 is drawn upwardly out.
S5, filter layer 3 extract out after, then by the grouting liquid being stirred in advance by provisions for grouting into vertical drainage pipeline 1 Grouting operation is carried out, the speed of grouting should maintain more slowly, to maintain the liquid level of grouting liquid the 1/3 of vertical drainage pipeline 1 Place.
S6 after the completion of grouting, is stood overnight, and after grouting liquid condensation, dry life stone is filled into vertical drainage pipeline 1 Ash, the quick lime amount filled is the 1/4-1/3 of 1 height of vertical drainage pipeline, after the completion of quick lime fills, remaining vertical row Waterpipe 1 takes the dry soil body to block, and completes Soft Ground.

Claims (9)

1. a kind of soft-soil foundation treatment method, which is characterized in that include the following steps:
S1, ground treatment, with clearing base table layer surface sundries;
S2 plugs vertical drainage pipeline (1) and vacuum exhaust line, installation drainpipe and vacuum pump;
S3, covering sealing film persistently carry out vacuumize process and drain in time;
S4 removes sealing film and vacuum pump after ground surface layer upper surface is without the exudation of obvious moisture,
S5 carries out grouting operation into vertical drainage pipeline (1);
S6 waits for grouting liquid infiltration condensation quietly, then fills quick lime into vertical drainage pipeline (1) after grouting to absolute altitude, finally again It is bound using dry soil property backfill.
2. a kind of soft-soil foundation treatment method according to claim 1, it is characterised in that:The vertical drainage pipeline (1) Sealed bottom is arranged and including inner tube (4) and jacket layer, and said inner tube (4) is made of the core plate (6) of multiple-layer stacked, and adjacent core Multiple tracks water-permeable passage (7) are formed between plate (6), the jacket layer is sheathed on the outer wall of inner tube (4).
3. a kind of soft-soil foundation treatment method according to claim 2, it is characterised in that:The jacket layer is by frictional layer (2) it is formed with filter layer (3), the frictional layer (2) is that hard material is made and offers multiple permeable holes (5), described Frictional layer (2) is fixedly connected on the bottom end of the vertical drainage pipe, and is formed between the frictional layer (2) and said inner tube (4) For placing the interlayer of the filter layer (3), the filter layer (3) uses water penetration geotextile.
4. a kind of soft-soil foundation treatment method according to claim 1, it is characterised in that:Vertical drainage pipeline is completed in S2 (1) after installation, it is laid with infiltration layer of sand in ground surface layer upper surface, the vacuum exhaust line includes the horizontal tube of connection and erects Straight tube, the horizontal tube are embedded in infiltration layer of sand, and the vertical pipe is embedded in the soft soil foundation soil body, the vacuum pump connection In on the horizontal tube.
5. a kind of soft-soil foundation treatment method according to claim 4, it is characterised in that:The sealing film covered in the S3 For the multilayer being successively laid with, the surrounding of the soft soil foundation has dug sealing ditch, and four edges of the sealing film are embedded in institute It states in sealing ditch.
6. a kind of soft-soil foundation treatment method according to claim 3, it is characterised in that:To vertical drainage pipe in the S5 When road (1) grouting operation, first filter layer (3) is extracted out from interlayer;The permeable hole (5) is along vertical drainage pipeline (1) Length direction is obliquely installed upwards.
7. a kind of soft-soil foundation treatment method according to claim 1, it is characterised in that:To vertical drainage pipe in the S6 When filling quick lime in road (1), the quick lime amount filled is the 1/4-1/3 of vertical drainage pipeline (1) height.
8. a kind of soft-soil foundation treatment method according to claim 5, it is characterised in that:Vacuumize process is carried out in S3 When, vacuum pump persistently carries out vacuumize process after being connected on horizontal tube, and handling duration 30-45 days, and handling duration is last At 10-15 days, it is connected with air intake pump in the other end of the horizontal tube, the air intake pump pumps hot-air.
9. a kind of soft-soil foundation treatment method according to claim 8, it is characterised in that:After air intake pump is opened, vacuum pump Increase and evacuate flow, degree of hollowness in soft soil foundation is maintained not become smaller compared with before air intake pump unlatching.
CN201810806661.1A 2018-07-20 2018-07-20 Soft soil foundation treatment method Active CN108824113B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201810806661.1A CN108824113B (en) 2018-07-20 2018-07-20 Soft soil foundation treatment method

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CN108824113B CN108824113B (en) 2020-09-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111945501A (en) * 2020-08-20 2020-11-17 长沙理工大学 Improved intelligent stone-avoiding device for turning over and drying bad fillers in case of over-wet embankment and use method thereof

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Publication number Priority date Publication date Assignee Title
CN1294970A (en) * 1999-11-08 2001-05-16 江苏浩创基础工程材料有限公司 Thermally welded plastic drainage board and its manufacture
CN102587352A (en) * 2012-02-24 2012-07-18 宁波市轨道交通工程建设指挥部 Hot-water draining consolidation processing device and hot-water draining consolidating processing method for soft soil foundation
CN103031835A (en) * 2012-12-28 2013-04-10 宁波高新区围海工程技术开发有限公司 Method for increasing foundation bearing capacity
CN105649002A (en) * 2015-12-29 2016-06-08 上海强劲地基工程股份有限公司 Rapid treatment system and rapid treatment method for soft soil foundation
CN107604897A (en) * 2017-09-28 2018-01-19 无锡厚发自动化设备有限公司 The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined
CN107905210A (en) * 2017-11-29 2018-04-13 慈溪市舒润卫浴实业有限公司 A kind of novel plastic drain bar

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1294970A (en) * 1999-11-08 2001-05-16 江苏浩创基础工程材料有限公司 Thermally welded plastic drainage board and its manufacture
CN102587352A (en) * 2012-02-24 2012-07-18 宁波市轨道交通工程建设指挥部 Hot-water draining consolidation processing device and hot-water draining consolidating processing method for soft soil foundation
CN103031835A (en) * 2012-12-28 2013-04-10 宁波高新区围海工程技术开发有限公司 Method for increasing foundation bearing capacity
CN105649002A (en) * 2015-12-29 2016-06-08 上海强劲地基工程股份有限公司 Rapid treatment system and rapid treatment method for soft soil foundation
CN107604897A (en) * 2017-09-28 2018-01-19 无锡厚发自动化设备有限公司 The reinforcement means that the vacuum preloading of soft soil foundation, air pressure splitting and grouting are combined
CN107905210A (en) * 2017-11-29 2018-04-13 慈溪市舒润卫浴实业有限公司 A kind of novel plastic drain bar

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111945501A (en) * 2020-08-20 2020-11-17 长沙理工大学 Improved intelligent stone-avoiding device for turning over and drying bad fillers in case of over-wet embankment and use method thereof

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