CN107313439A - A kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking - Google Patents
A kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking Download PDFInfo
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- CN107313439A CN107313439A CN201710691993.5A CN201710691993A CN107313439A CN 107313439 A CN107313439 A CN 107313439A CN 201710691993 A CN201710691993 A CN 201710691993A CN 107313439 A CN107313439 A CN 107313439A
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- Prior art keywords
- curtain
- releasing
- collapsible loess
- seepage proof
- foundation settlement
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/16—Restraining of underground water by damming or interrupting the passage of underground water by placing or applying sealing substances
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking, belong to field of foundation treatment, to solve the problems, such as the saturated yielding of big thickness collapsible loess foundation.Process step includes：According to building（Structure）Build thing basic scope, site topography unwrapping wire arrangement seepage proof curtain；Built（Structure）The construction of the following seepage proof curtain in thing basis is built, the vertical grouting curtain of closing is formed；It is yet to be built（Structure）Build and seepage proof curtain around it is carried out when foundation ditch is backfilled after the completion of under ground portion construct, complete place processing.The inventive method principle is the seepage water source in blocking ground, it is ensured that the lower foundation soil in basis is not soaked, so as to play the bearing capacity of original soil, saturated yielding is not produced, during using pile foundation, negative friction is not produced.With good environmental benefit.
Description
Technical field
The invention belongs to field of foundation treatment, the seepage proof curtain knot of collapsible loess foundation settlement by soaking is more particularly to released
Structure.
Background technology
Collapsible loess is a kind of under drying regime, with higher-strength and compared with low compressibility, is met after water certain outer
A kind of Special Rock of intensity rapid drawdown under power effect or Gravitative Loads.It is distributed widely in China Gansu, Ningxia, Shaanxi and Shanxi
Deng Loess Plateau, wherein most representative with 03 kalimeris group loess.Collapsible loess is a kind of soil of special nature, its
Soil property is more uniform, short texture, space development.When not by water-soaked, foundation bearing capacity is higher, and compressibility is smaller.Once meet
Water and under pressure, when intensity remaining in the soil body is insufficiently resistant to the structural stress in the soil body, soil structures are rapid
Destruction, and occur significant depression, the saturated yielding of the collapsible loess foundation soil body has great harmfulness to engineering construction.
The content of the invention
It is an object of the invention to provide a kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking；
It is a further object to provide a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking, to solve
The saturated yielding problem of big thickness collapsible loess foundation.
Technical solution of the present invention is as follows：A kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking, in building
Vertical grouting curtain is provided with around thing under ground portion, lower curtain is being provided with below vertical grouting curtain around collapsible loess.
Further, as one embodiment of the present invention, the lower curtain is native curtain.
Further, as another embodiment of the invention, the lower curtain is native curtain, in vertical grouting curtain
With native curtain（1）Interior to be provided with antiseepage film, antiseepage film is geomembrane.
Further, as another embodiment of the invention, lower curtain is compacted curtain, is provided with compaction pile.
A kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking, comprises the following steps：
（1）The lower curtain of arrangement；
（2）Treat after the completion of building under ground portion, carry out the arrangement of its surrounding vertical seepage proof curtain, complete place processing.
Further, the width B of the lower curtain is 400 ~ 4000mm.
Further, the lower curtain is compacted curtain, and compaction pile pore-forming is formed by bidirectional screw drill hole of drilling machine, drilling
A diameter of 300 ~ 600mm；Plain soil or dirt segmentation is inserted in drilling, is tamped, compacting factor is not less than 0.95.
Further, the coefficient of permeability K of the lower curtain and vertical grouting curtain is 10-6~10-5cm/s。
Further, lower curtain and vertical grouting curtain are the native curtain of element or dirt curtain.
Further, the particle maximum particle diameter of banketing of element soil is no more than 15mm in curtain, earth material sieving, in dirt lime and
The volume ratio of earth material is 2:8 or 3:7；Lime preferably selects fresh calcium hydroxide, and its maximum particle diameter cannot be greater than 5mm；Earth material is preferably selected
With silty clay, block clay should not be used, and soft impurity must not be contained, earth material sieves and maximum particle diameter cannot be greater than
15mm；Plain soil or dirt maximum dry density are not less than 1.68g/cm3, optimum moisture content is 15 ~ 17%.
The inventive method principle is the seepage water source in blocking ground, it is ensured that the lower foundation soil in basis is not soaked, so as to send out
The bearing capacity of original soil is waved, saturated yielding is not produced, during using pile foundation, negative friction is not produced.
The present invention prevents substrate collapsible loess saturated yielding using seepage proof curtain method, and with low cost, speed of application is fast, and curtain is returned
It is plain soil to banket（Dirt）, with good environmental benefit.
Brief description of the drawings：
Fig. 1 is the structural representation of the first embodiment of the invention；
Fig. 2 is Fig. 1 plan；
Fig. 3 is the structural representation of second of embodiment of the invention；
Fig. 4 is Fig. 3 plan；
Fig. 5 is the structural representation of the third embodiment of the invention；
Fig. 6 is Fig. 5 plan.
Reference implication is as follows：Native curtain（1）, collapsible loess（2）, vertical grouting curtain（3）, outdoor ground（4）、
Build（Structure）Build under ground portion（5）, antiseepage film（6）, compaction pile（7）, between stake by compacted soil（8）.
Embodiment
The present invention will be further described in detail below in conjunction with the accompanying drawings.
A kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking, is provided with around building under ground portion 5
Vertical grouting curtain 3, is being provided with lower curtain around collapsible loess 2 below vertical grouting curtain 3.Vertical grouting curtain 3
Yu Jian（Structure）Build under thing outdoor ground 4.
As a kind of embodiment, lower curtain is native curtain 1.
As a kind of embodiment, lower curtain is native curtain 1, and antiseepage film is provided with vertical grouting curtain 3 and native curtain 1
6, antiseepage film is geomembrane.
As a kind of embodiment, lower curtain is compacted curtain, is provided with compaction pile 7.Compaction pile is 2 ~ 6 rows, uniformly
Around collapsible loess.
This method is applied to building with underground structure（Structure）Thing basement process is built, is built（Structure）Build thing under ground portion bottom plate, it is outer
Wall all should carry out seepage prevention design.
Seepage proof curtain is close to build in following embodiments（Structure）Under ground portion peripheral disposition is built, the vertical scope of curtain is outdoor ground
Face（4）Determined below to yellow soil horizon of collapsibility bottom or according to seepage calculation.
The coefficient of permeability K of seepage proof curtain is 10-6~10-5cm/s。
Can not adulterate the rubbish such as organic matter (including building waste in element soil in various curtains）, be free of（Or contain less）Stone
Block or other impurities.The particle maximum particle diameter of banketing of element soil is no more than 15mm in plain soil curtain, and earth material should sieve.Ash in curtain
Native nominal mix proportion is 2:8 or 3:7；Lime preferably selects fresh calcium hydroxide, and its maximum particle diameter cannot be greater than 5mm；Earth material is preferably selected
With silty clay, block clay should not be used, and soft impurity must not be contained, earth material should sieve and maximum particle diameter cannot be greater than
15mm.Plain soil（Dirt）General maximum dry density is not less than 1.68g/cm3, optimum moisture content 16% or so, specific maximum dry is close
Degree, optimum moisture content are determined by compaction test.
Embodiment 1- sets element soil（Dirt）Curtain
According to building（Structure）Build thing basic scope, the native curtain of site topography unwrapping wire arrangement（1）, native curtain is plain native or dirt curtain,
After the completion of positioning, unwrapping wire, excavation, plain soil or dirt are inserted into compaction in layers, compacting factor is not less than 0.95.Around building（Structure）Build
Under ground portion（5）Form the vertical grouting curtain of closing（3）, itself and element are native（Dirt）Curtain ensures vertical continuous uninterrupted.
Embodiment 2- sets native curtain and antiseepage film curtain
According to building（Structure）Build thing basic scope, the native curtain of site topography unwrapping wire arrangement（1）, native curtain is plain native or dirt curtain,
After the completion of positioning, unwrapping wire, excavation, plain soil or dirt are inserted into compaction in layers, compacting factor is not less than 0.95.Around building（Structure）Build
Under ground portion（5）The vertical grouting curtain 3 of closing is formed, itself and element are native（Dirt）Curtain ensures vertical continuous uninterrupted.Hanging down
Straight seepage proof curtain（3）With native curtain（1）It is interior to be provided with antiseepage film 6.
Embodiment 3- sets compacted curtain
According to building（Structure）Build thing basic scope, site topography unwrapping wire arrangement bidirectional screw element soil（Dirt）Compaction pile（7）, it is adjacent to squeeze
Close stake（7）Between be stake between by compacted soil（8）；Positioning, unwrapping wire, using bidirectional screw drill hole of drilling machine, bore diameter d=300 ~
600mm, element soil（Dirt）Drilling is inserted in segmentation, is tamped, and compacting factor is not less than 0.95.Construct at compaction pile interval.
The compacted curtain of the other compaction piles of embodiment 4--,
According to building（Structure）Build thing basic scope, site topography unwrapping wire and arrange between other compaction piles, adjacent compaction pile to be quilt between stake
Compacted soil；Filler stake holes is inserted in positioning, unwrapping wire, pore-forming, bore dia d=300 ~ 1000mm, segmentation, is tamped.Compaction pile interval
Construction.
Claims (10)
1. a kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking, it is characterised in that：In building under ground portion
（5）Surrounding is provided with vertical grouting curtain（3）, in vertical grouting curtain（3）Lower section collapsible loess（2）Around be provided with lower curtain
Curtain.
2. a kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking according to claim 1, its feature exists
In：The lower curtain is native curtain（1）.
3. a kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking according to claim 1, its feature exists
In：The lower curtain is native curtain（1）, in vertical grouting curtain（3）With native curtain（1）It is interior to be provided with antiseepage film（6）, antiseepage film is
Geomembrane.
4. a kind of seepage proof curtain structure for releasing collapsible loess foundation settlement by soaking according to claim 1, its feature exists
In：Lower curtain is compacted curtain, is provided with compaction pile（7）.
5. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking, it is characterised in that comprise the following steps：
（1）The lower curtain of arrangement；
（2）Treat after the completion of building under ground portion, carry out the arrangement of its surrounding vertical seepage proof curtain, complete place processing.
6. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking according to claim 5, its feature exists
In：The width B of the lower curtain is 400 ~ 4000mm.
7. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking according to claim 5, its feature exists
In：The lower curtain is compacted curtain, compaction pile（7）Pore-forming is formed by bidirectional screw drill hole of drilling machine, drilling a diameter of 300 ~
600mm；Plain soil or dirt segmentation is inserted in drilling, is tamped, compacting factor is not less than 0.95.
8. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking according to claim 5, its feature exists
In：The coefficient of permeability K of the lower curtain and vertical grouting curtain is 10-6~10-5cm/s。
9. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking according to claim 5, its feature exists
In：Lower curtain and vertical grouting curtain（3）For plain native curtain or dirt curtain.
10. a kind of seepage proof curtain method for releasing collapsible loess foundation settlement by soaking according to claim 9, its feature exists
In：The particle maximum particle diameter of banketing of element soil is no more than 15mm in curtain, and earth material sieves, and the volume ratio of lime and earth material is in dirt
2:8 or 3:7；Lime preferably selects fresh calcium hydroxide, and its maximum particle diameter cannot be greater than 5mm；Earth material preferably selects silty clay, unsuitable
Using block clay, and soft impurity must not be contained, earth material sieves and maximum particle diameter cannot be greater than 15mm；Plain soil or dirt are maximum
Dry density is not less than 1.68g/cm3, optimum moisture content is 15 ~ 17%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710691993.5A CN107313439A (en) | 2017-08-14 | 2017-08-14 | A kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking |
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| CN201710691993.5A CN107313439A (en) | 2017-08-14 | 2017-08-14 | A kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking |
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| CN107313439A true CN107313439A (en) | 2017-11-03 |
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| CN201710691993.5A Pending CN107313439A (en) | 2017-08-14 | 2017-08-14 | A kind of seepage proof curtain structure and method for releasing collapsible loess foundation settlement by soaking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112921726A (en) * | 2021-01-28 | 2021-06-08 | 长安大学 | Roadbed structure capable of preventing roadbed soil from being dry cracked or wet sunk and construction method thereof |
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| CN112921726A (en) * | 2021-01-28 | 2021-06-08 | 长安大学 | Roadbed structure capable of preventing roadbed soil from being dry cracked or wet sunk and construction method thereof |
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