CN105887794A - Pretreatment method for super-thick waste soil foundation - Google Patents
Pretreatment method for super-thick waste soil foundation Download PDFInfo
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- CN105887794A CN105887794A CN201610226326.5A CN201610226326A CN105887794A CN 105887794 A CN105887794 A CN 105887794A CN 201610226326 A CN201610226326 A CN 201610226326A CN 105887794 A CN105887794 A CN 105887794A
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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
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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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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Abstract
A pretreatment method for a super-thick waste soil foundation comprises the following steps that 1, the surface of a super-thick waste soil field is leveled and compacted; 2, air permeability preventing composite geotechnical cloth is laid on the surface of the super-thick waste soil field; 3, the super-thick waste soil field where the air permeability preventing composite geotechnical cloth is laid is constructed for hole drilling; 4, a vacuum negative pressure method or a deep degradation method or an incineration method is determined as a treatment method of the super-thick waste soil foundation; and 5, the portions, around drilled holes, of the super-thick waste soil foundation are ram-reamed and compacted, and pile foundation engineering is constructed. According to the pretreatment method, a super-thick waste soil layer is pretreated into a regenerated soil layer, so that the foundation soil strength is improved, the foundation settlement amount is reduced, and negative friction resistance of foundation soil to latterly constructed piles is reduced; and the technical problems that a traditional foundation treatment method is narrow in application range and limited in reinforced depth, and the bearing force of a reinforced foundation cannot meet design requirements are solved.
Description
Technical field
The invention belongs to building field, particularly to a kind of waste soil ground deep level of processing method to super thick.
Background technology
Super thick waste soil ground preprocess method is a kind of new method of building foundation treatment.Waste soil refers to the artificial spoirs such as house refuse is banketed, building waste bankets, industrial refuse.These waste soil compare its complicated component with subsoil, construct loose, it is impossible to meet building lot design requirement.Super thick waste soil generally carries out single treatment also tend to not reach design requirement.Such as organic matter in house refuse and plastics, use to the ground later stage and cause a hidden trouble；The building in the complicated and big space of structure is banketed and also can be affected the safe handling of ground.Due to city development and the requirement of construction area, we must carry out process safely, economical and environmentally friendly, these waste soil are turned into building lot the waste soil ground of super thick.
At present to waste soil basement process, it is more to use soil removal and replacement, strong rammer, rammer to expand and compacted method.Soil removal and replacement is excavated exactly and is transported waste soil, the newer soil of backfill, and this method is only applicable to scope and the little waste soil place of thickness, if the waste soil place that super thick is big, area is big is when excavation is transported, can cause second time environmental pollution and form second waste soil field；The tamping depth of dynamic compaction method is limited, processes the degree of depth for super thick waste soil inadequate, and foundation bearing capacity does not reaches design requirement；Ram expansion and compacted method coverage is limited, some composition (such as organic matter and the plastic of house refuse) cannot be got rid of, hidden danger can be left to building.
Summary of the invention
The present invention proposes a kind of super thick waste soil ground preprocess method,The method for processing foundation scope of application is little, second time environmental pollution, reinforcement depth can be caused limited and reinforcing groundwork bearing capacity does not reaches the technical problem that design requires to solve tradition.
A kind of super thick waste soil ground preprocess method, it is characterised in that include that step is as follows.
Step one: the earth's surface in super thick waste soil place is flattened and is compacted.
Step 2: lay air tight composite earthwork cloth on the earth's surface in super thick waste soil place.
Step 3: construction drill on the super thick waste soil place be equipped with air tight composite earthwork cloth.
Step 4: according to structure, constituent and the water content size of super thick waste soil foundation soil, determines that the processing method to super thick waste soil ground is vacuum suction method or deep edman degradation Edman or incineration method.
Step 5: according to the method in step 4, reaches after design requires to the process of foundation soil, then carries out ramming to boring super thick waste soil ground around and expand and compacted, construction stake foundation engineering.
Preferably, super thick waste soil ground is that voidage is more than 10%, super thick waste soil ground without house refuse is then in step 4, super thick waste soil to be carried out vacuum suction method process.
Described vacuum suction method comprises the steps.
Step a: after step 3 construction, install negative pressure of vacuum device for filling in drill hole.
Step b: opening the valve A of the three-way valve being connected with vacuum pump, the gas in extraction super thick waste soil ground space, when aspirator vacuum degree reaches to turn off valve A after design requires.
Step c: get casting resin ready, opens the valve B of the three-way valve being connected with batch can, and casting resin is entered in super thick waste soil ground space by screen casing hole under suction function, and the degree of compaction of ground reaches design and requires that degree of compaction turns off valve B.
Step d: remove negative pressure of vacuum device for filling, extract the steel pipe in boring and protection tube, then carry out step 5.
Preferably, the aperture of described boring is more than 89mm, and hole depth is designed into bottom super thick waste soil；Described casting resin is cement mortar, coal ash pulp or waterglass.
A kind of negative pressure of vacuum device for filling carrying out vacuum suction method process for super thick waste soil, it is characterised in that: described negative pressure of vacuum device for filling include three-way valve, the batch can being connected to two ends, three-way valve left and right and vacuum pump, be connected to three-way valve lower end for bleeding and the steel pipe of feeding, being enclosed within the protection tube outside steel pipe and the sealing-plug being clipped between steel pipe and protection tube；Described steel pipe and protection tube are inserted in the borehole, and leave gap between protection tube and borehole sidewall；The bottom of described protection tube is the screen casing being with holes on one section of sidewall, and is provided with dismountable plug at the lower ending opening of protection tube.
Described sealing-plug be shaped as annular, be positioned at the top of screen casing；Screen casing UNICOM is passed through in gap between described steel pipe, protection tube and borehole sidewall.
Preferably, if described super thick waste soil ground is the super thick waste soil ground containing house refuse, in super thick waste soil water content more than 25%, the content of organic matter more than 20%, then in step 4, super thick waste soil is carried out deep degradation treatment.
The degraded of described deep comprises the steps.
Step a: put into degradable material in boring, the organic matter in super thick waste soil and degradable material are degraded.
Step b: degraded reaches to design requirement, carries out step 5.
Preferably, the aperture of described boring is more than 400mm, and hole depth is designed into bottom super thick waste soil.
Preferably, if described super thick waste soil ground is the super thick waste soil ground containing house refuse, in house refuse water content less than 5%, Organic substance and the content of organic matter more than 10%, then in step 4, super thick waste soil is carried out incineration process.
Described incineration comprises the steps.
Step a: install incinerating apparatus.
Step b: be passed through oxygen and liquefied gas in boring by incinerating apparatus；Light the burner of incinerating apparatus, incinerate.
Step c: remove incinerating apparatus, then carry out ramming expansion with compacted to boring super thick waste soil ground around.
Preferably, the aperture of described boring is more than 400mm, and hole depth is designed into bottom super thick waste soil.
Preferably, described incinerating apparatus is that segmentation the most from bottom to top is incinerated to the incineration of the Organic substance in super thick waste soil and organic waste material.
A kind of incinerating apparatus carrying out incineration process for super thick waste soil, it is characterised in that: described incinerating apparatus includes liquid gas storage tank, liquefied gas snorkel, oxygen tank, send oxygen hose and burner；One end of described liquefied gas snorkel is connected with liquid gas storage tank, and the other end stretches into the bottom of boring and is connected with burner；Described sending oxygen hose one end to be connected with oxygen tank, the other end stretches into the bottom of boring and is connected with burner.
Compared with prior art the invention have the characteristics that and beneficial effect.
1, super thick is discarded soil layer pretreatment and is become raw soil layer again by the present invention, improve foundation soil strength, reduce settlement of foundation, also reducing foundation soil and the pile body of construction in later period is born frictional resistance, the method for processing foundation scope of application is little, reinforcement depth is limited and reinforcing groundwork bearing capacity does not reaches the technical problem that design requires to overcome tradition.
2, super thick waste soil deep of the present invention pretreatment uses degraded and incinerating method, dissolve partial organic substances matter and plastic garbage, reduce the house refuse impact on ground, can be with sintering curing simultaneously for the clay class soil body, waste soil ground is processed into regeneration soil base, there is the advantage not causing secondary pollution.
3, the present invention degrade and incinerate generation material, reducing after treatment subsoil water and air are produced and pollute, environment is played a protective role.
4, the present invention utilizes negative pressure of vacuum casting resin (ashes or serosity) to be filled in the space of super thick waste soil and forms raw soil layer again, makes waste soil intensity and bearing capacity be greatly improved.
Accompanying drawing explanation
Fig. 1 negative pressure of vacuum device for filling schematic diagram.
Fig. 2 incinerating apparatus schematic diagram.
Reference: 1-boring, 2-protection tube, 3-composite earthwork cloth, 4-sealing-plug, 5-three-way valve, 6-vacuum pump, 7-batch can, 8-steel pipe, 9-valve B, 10-valve A, 11-liquid gas storage tank, 12-liquefied gas snorkel, 13-oxygen tank, 14-send oxygen hose, 15-burner, 16-plug.
Detailed description of the invention
The present invention is that super thick waste soil ground is used deep layer preprocess method, discarded soil layer pretreatment is become raw soil layer again, improves the engineering properties of waste soil ground, then carries out ramming and expand the processing methods such as closely knit, forms the ground meeting Architectural Design Requirements.
It is the composition according to it and structure two kinds of methods of employing to waste soil ground preprocess method.One is space big for the super thick without house refuse building and the waste soil of industry, uses negative pressure of vacuum placement method, is i.e. the formation negative pressure that is evacuated in the space in deep of banketing, then utilizes negative pressure filling powder (flyash or cement flour) and serosity.Being filled with closely knit in a range of space of borehole circumference, be transformed into raw soil layer again, make its engineering properties be improved, pile foundation engineering of constructing in regeneration soil ground will be met the effect of Architectural Design Requirements；Two is first to use degraded and incinerating method to being mingled with the waste soil ground of house refuse, the organic matter in waste soil and plastic degradation and incineration is fallen, improves the engineering properties of soil around pile, then use negative pressure of vacuum placement method to reinforce.Waste soil ground is become regeneration soil ground through pretreatment, the pile foundation engineerings such as tamping compaction of then constructing.This waste soil ground through pretreatment, can design and build various building thereon.
Embodiment one: super thick waste soil ground be voidage be more than 10%, super thick waste soil ground without house refuse or building or industry discarded banket super thick waste soil ground time.
As it is shown in figure 1, this super thick waste soil ground preprocess method includes that step is as follows.
Step one: the earth's surface in super thick waste soil place is flattened and is compacted.
Step 2: lay air tight composite earthwork cloth 3 on the earth's surface in super thick waste soil place, to prevent earth's surface from breathing freely.
Step 3: construction drill 1 on the super thick waste soil place be equipped with air tight composite earthwork cloth 3, aperture is more than 89mm, and hole depth is designed into bottom waste soil.
Step 4: super thick waste soil ground vacuum suction method is processed.
The step processed is as follows:
Step a: after step 3 construction, installs negative pressure of vacuum device for filling at boring 1.
Step b: opening the valve A10 of the three-way valve being connected with vacuum pump 6, the gas in extraction super thick waste soil ground space, when aspirator vacuum degree reaches to turn off valve A10 after design requires.
Step c: get casting resin ready, opens the valve B9 of the three-way valve being connected with batch can 7, and casting resin is entered in super thick waste soil ground space by screen casing hole under suction function, and the degree of compaction of ground reaches design and requires that degree of compaction turns off valve B9.
Step d: remove negative pressure of vacuum device for filling, extracts the steel pipe 8 in boring 1 and protection tube 2, then carries out step 5.
Step 5: according to the method in step 4, reaches after design requires to the process of foundation soil, then carries out ramming to the super thick waste soil ground around boring 1 and expand and compacted, construction stake foundation engineering.
In the present embodiment, described casting resin is cement mortar, coal ash pulp or waterglass.
This negative pressure of vacuum device for filling carrying out vacuum suction method process for super thick waste soil, include three-way valve 5, the batch can 7 being connected to three-way valve about 5 two ends and vacuum pump 6, be connected to three-way valve 5 lower end for bleeding and the steel pipe 8 of feeding, being enclosed within the protection tube 2 outside steel pipe 8 and the sealing-plug 4 being clipped between steel pipe 8 and protection tube 2；Described steel pipe 8 and protection tube 2 are inserted in boring 1, and leave gap between protection tube 2 and boring 1 sidewall；Described sleeve pipe 2 is the screen casing being equipped with diameter aperture on one section of sidewall in 2 meters of bottoms to sleeve pipe 2 of below ground of distance, is provided with dismountable plug 16 at a diameter of the 8 of described screen casing～12cm, and the lower ending opening of sleeve pipe 2；Being shaped as global shape and be positioned at the top of screen casing of described sealing-plug 4.Gap between described sleeve pipe 2 and boring 1 sidewall is sealed by composite earthwork cloth 3, is sealed by the sealing-plug 4 above screen casing between sleeve pipe 2 and steel pipe 8, thus by the gap UNICOM between described steel pipe 8, protection tube 2 and boring 1 sidewall.
Embodiment two: when in super thick waste soil ground water content higher than 25%, the content of organic matter higher than 20% time.
As it is shown in figure 1, this super thick waste soil ground preprocess method includes that step is as follows.
Step one: the earth's surface in super thick waste soil place is flattened and is compacted.
Step 2: lay air tight composite earthwork cloth 3 on the earth's surface in super thick waste soil place, to prevent earth's surface from breathing freely.
Step 3: construction drill 1 on the super thick waste soil place be equipped with air tight composite earthwork cloth 3, aperture is more than 400mm, and hole depth is designed into bottom waste soil.
Step 4: the house refuse in super thick waste soil ground is carried out deep degraded.
Deep degraded comprises the steps again.
Step a: put into degradable material in boring 1, selects chemistry or biomaterial to degrade the carrying out of waste material organic and degradable in house refuse according to organic in discarded house refuse and degradable waste material composition.
Step b: degradation time is longer, observation degraded reaches design and requires that step carries out step 5.
Step 5: according to the method in step 4, reaches after design requires to the degraded of the house refuse in super thick waste soil ground, then carries out ramming to the super thick waste soil ground around boring 1 and expand and compacted, construction stake foundation engineering.
Embodiment three: more than waste soil water level located underground, when water content is less than 5%, plastics and the content of organic matter more than 10%.
As in figure 2 it is shown, this super thick waste soil ground preprocess method includes that step is as follows.
Step one: the earth's surface in super thick waste soil place is flattened and is compacted.
Step 2: lay air tight composite earthwork cloth 3 on the earth's surface in super thick waste soil place, to prevent earth's surface from breathing freely.
Step 3: construction drill 1 on the super thick waste soil place be equipped with air tight composite earthwork cloth 3, aperture is more than 400mm, and hole depth is designed into bottom waste soil.
Step 4: the house refuse in super thick waste soil ground is incinerated.
Step a: install incinerating apparatus.
Step b: be passed through oxygen and liquefied gas in boring 1 by incinerating apparatus；Point burner 15, incinerates.
Step c: remove incinerating apparatus, then carry out step 5.
Step 5: according to the method in step 4, incinerates the house refuse in foundation soil and reaches after design requires, then carries out ramming to the super thick waste soil ground around boring 1 and expand and compacted, construction stake foundation engineering.
This incinerating apparatus for house refuse incineration process, described incinerating apparatus includes liquid gas storage tank 11, liquefied gas snorkel 12, oxygen tank 13, send oxygen hose 14 and burner 15；One end of described liquefied gas snorkel 12 is connected with liquid gas storage tank 11, and the other end stretches into the bottom of boring 1 and is connected with burner 15；Described sending oxygen hose 14 one end to be connected with oxygen tank 13, the other end stretches into the bottom of boring 1 and is connected with burner 15.
In the present embodiment, the incineration of segmentation from bottom to top in boring 1 to the organic matter in house refuse and degradable incinerating waste material of described incinerating apparatus, along with incineration carries out, uses the artificial or position of lifting device Synchronous lifting burner 15.
Above-mentioned work progress can be constructed with porous simultaneously and be provided with peephole.Design area carries out other pile foundation construction after having constructed again.
By the way, by the organic matter in house refuse and degradable incinerating waste material with decompose and by clay class soil sintering curing, eliminating the organic matter around boring 1 and degradable waste material affects engineering foundation,
Content described in this specification embodiment is only enumerating of the way of realization to inventive concept; protection scope of the present invention is not construed as being only limitted to the concrete form that embodiment is stated, protection scope of the present invention contain those skilled in the art according to present inventive concept it is conceivable that equivalent technologies means.
Claims (10)
1. a super thick waste soil ground preprocess method, it is characterised in that comprise the following steps that
Step one: the earth's surface in super thick waste soil place is flattened and is compacted；
Step 2: lay air tight composite earthwork cloth (3) on the earth's surface in super thick waste soil place；
Step 3: construction drill (1) on the super thick waste soil place being equipped with air tight composite earthwork cloth (3)；
Step 4: according to structure, constituent and the water content size of super thick waste soil foundation soil, determines that the processing method to super thick waste soil ground is vacuum suction method or deep edman degradation Edman or incineration method；
Step 5: according to the method in step 4, reaches after design requires to the process of foundation soil, then carries out ramming to boring (1) super thick waste soil ground around and expand and compacted, construction stake foundation engineering.
A kind of super thick waste soil ground preprocess method the most according to claim 1, it is characterised in that:
Super thick waste soil ground be voidage be more than 10%, super thick waste soil ground without house refuse time, then in step 4, super thick waste soil is carried out vacuum suction method process；
Described vacuum suction method comprises the steps:
Step a: after step 3 construction, installs negative pressure of vacuum device for filling at boring (1) place；
Step b: opening the valve A (10) of the three-way valve being connected with vacuum pump (6), the gas in extraction super thick waste soil ground space, when aspirator vacuum degree reaches to turn off valve A(10 after design requires)；
Step c: get casting resin ready, opens the valve B(9 of the three-way valve being connected with batch can (7)), casting resin is entered in super thick waste soil ground space by screen casing hole under suction function, and the degree of compaction of ground reaches design and requires that degree of compaction turns off valve B(9)；
Step d: remove negative pressure of vacuum device for filling, extract the steel pipe (8) in boring (1) and protection tube (2), then carry out step 5.
Super thick waste soil ground preprocess method the most according to claim 2, it is characterised in that: the aperture of described boring (1) is more than 89mm, and hole depth is designed into bottom super thick waste soil；Described casting resin is cement mortar, coal ash pulp or waterglass.
4. one kind for carrying out the negative pressure of vacuum device for filling of vacuum suction method process to the super thick waste soil described in claim 2, it is characterised in that: described negative pressure of vacuum device for filling include three-way valve (5), the batch can (7) being connected to three-way valve (5) two ends, left and right and vacuum pump (6), be connected to three-way valve (5) lower end for bleeding and the steel pipe (8) of feeding, being enclosed within the protection tube (2) outside steel pipe (8) and the sealing-plug (4) being clipped between steel pipe (8) and protection tube (2)；Described steel pipe (8) and protection tube (2) are inserted in boring (1), and leave gap between protection tube (2) and boring (1) sidewall；The bottom of described protection tube (2) is to be provided with dismountable plug (16) at the screen casing being with holes on one section of sidewall, and the lower ending opening of protection tube (2)；
Described sealing-plug (4) be shaped as annular, be positioned at the top of screen casing；Gap between described steel pipe (8), protection tube (2) and boring (1) sidewall is by screen casing UNICOM.
Super thick waste soil ground preprocess method the most according to claim 1, it is characterized in that, if described super thick waste soil ground is the super thick waste soil ground containing house refuse, in super thick waste soil water content more than 25%, the content of organic matter more than 20%, then in step 4, super thick waste soil is carried out deep degradation treatment；
The degraded of described deep comprises the steps:
Step a: put into degradable material in boring (1), the organic matter in super thick waste soil and degradable material are degraded；
Step b: degraded reaches to design requirement, carries out step 5.
Super thick waste soil ground preprocess method the most according to claim 5, it is characterised in that: the aperture of described boring (1) is more than 400mm, and hole depth is designed into bottom super thick waste soil.
Super thick waste soil ground preprocess method the most according to claim 1, it is characterized in that, if described super thick waste soil ground is the super thick waste soil ground containing house refuse, in house refuse water content less than 5%, Organic substance and the content of organic matter more than 10%, then in step 4, super thick waste soil is carried out incineration process；
Described incineration comprises the steps:
Step a: install incinerating apparatus；
Step b: be passed through oxygen and liquefied gas in boring (1) by incinerating apparatus；Light the burner (15) of incinerating apparatus, incinerate；
Step c: remove incinerating apparatus, then carry out step 5.
Super thick waste soil ground preprocess method the most according to claim 7, it is characterised in that: the aperture of described boring (1) is more than 400mm, and hole depth is designed into bottom super thick waste soil.
Super thick waste soil ground preprocess method the most according to claim 7, it is characterised in that: incineration segmentation from bottom to top in boring (1) of the Organic substance in super thick waste soil and organic waste material is incinerated by described incinerating apparatus.
10. the incinerating apparatus being used for the super thick waste soil described in claim 7 carries out incineration process, it is characterised in that: described incinerating apparatus includes liquid gas storage tank (11), liquefied gas snorkel (12), oxygen tank (13), send oxygen hose (14) and burner (15)；One end of described liquefied gas snorkel (12) is connected with liquid gas storage tank (11), and the other end stretches into the bottom of boring (1) and is connected with burner (15)；Described sending oxygen hose (14) one end to be connected with oxygen tank (13), the other end stretches into the bottom of boring (1) and is connected with burner (15).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107794935A (en) * | 2016-08-31 | 2018-03-13 | 宝山钢铁股份有限公司 | A kind of Wei Jinsi gas chambers bottom plate infrastructure device for filling and placement method |
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