CN110055977A - Vacuum soil nailing - Google Patents
Vacuum soil nailing Download PDFInfo
- Publication number
- CN110055977A CN110055977A CN201910361326.XA CN201910361326A CN110055977A CN 110055977 A CN110055977 A CN 110055977A CN 201910361326 A CN201910361326 A CN 201910361326A CN 110055977 A CN110055977 A CN 110055977A
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- CN
- China
- Prior art keywords
- vacuum
- breath
- soil
- holding
- section
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a kind of vacuum soil nailings, including vacuum zone and section of holding one's breath, the vacuum zone and section of holding one's breath, which is respectively positioned on, to be reinforced in vivo, the vacuum zone is located at below section of holding one's breath, the extension end of the section of holding one's breath is connected with vacuum tube, and connect by vacuum tube with vacuum source, so that vacuum zone is in vacuum state, the steel pipe or solid concrete of holding one's breath that the section of holding one's breath selects tube wall to hold one's breath in working stage；The vacuum zone selects tube wall to set foraminate steel pipe or ventilative concrete.Vacuum zone of the invention can promote surrounding soil hole air pressure to decline, and effective stress increases in the soil body, and soil shear strength improves, and the skid resistance for being reinforced body increases, and self stability improves；The effect of frictional force of the soil body and soil nailing increases, i.e., pulling capacity of soil nail power increases, soil nailing is promoted；The acquisition device simple of vacuum pressure is cheap, and energy-output ratio is small, very low compared to the soil nailing cost of armored concrete, also greatly reduces carbon emission.
Description
Technical field
The present invention relates to pattern foundation pit supporting structure, reinforcing side slope technique field more particularly to a kind of vacuum soil nailings.
Background technique
Plate brad supporting and soil-nail wall support are a kind of support reinforcement modes used in the engineerings such as soil-slope, foundation pit,
It is a kind of soil body reinforcement technology in situ, elongated high strong component is set in stratum, reinforces stratum globality, plays supporting and add
Gu effect.Soil nailing has bored grouting type, squeezes into type and squeezes into three kinds of forms of slip casting type.
Summary of the invention
Goal of the invention: it is an object of the present invention to provide a kind of vacuum soil nailings.
Technical solution: the present invention includes vacuum zone and section of holding one's breath, and the vacuum zone and section of holding one's breath are respectively positioned on and are reinforced body
Interior, the vacuum zone is located at below section of holding one's breath, and the extension end of the section of holding one's breath is connected with vacuum tube, and by vacuum tube and very
Empty source connection, makes vacuum zone be in vacuum state in working stage.
The steel pipe or solid concrete of holding one's breath that the section of holding one's breath selects tube wall to hold one's breath.
The vacuum zone selects tube wall to set foraminate steel pipe or ventilative concrete.
The aperture of the steel pipe aperture prevents week between 0.5-2mm, and less than 3 times of surrounding soil average grain diameter
The soil particle enclosed enters, and when the soil body is the fine grained soils such as clay, silt, the surrounding of vacuum zone wraps up one layer of geotextiles.
The described section of holding one's breath select it is solid hold one's breath concrete when, vacuum tube is set in section of holding one's breath, the vacuum tube extends
To vacuum zone.
The vacuum tube enters the length of vacuum zone not less than 5cm, guarantees vacuum conduction.
The vacuum tube selects steel pipe or pvc pipe.
A kind of construction method of vacuum soil nailing, which comprises the following steps:
(1) prepare soil nailing；
(2) soil nailing is squeezed into and is reinforced body；
(3) vacuum source is connected, is vacuumized；
(4) when no longer needing vacuum, stop vacuumizing, remove vacuum source, the soil nailing for needing to recycle is extracted into cleaning.
The utility model has the advantages that vacuum zone of the invention can promote surrounding soil hole air pressure to decline, effective stress increases in the soil body,
With following three advantages:
(1) soil shear strength improves, and the skid resistance for being reinforced body increases, and self stability improves；
(2) the effect of frictional force of the soil body and soil nailing increases, i.e., pulling capacity of soil nail power increases, soil nailing is promoted: pulling capacity of soil nail power
Equal to the sum of vacuum pressure and weight stress multiplied by the coefficient of friction of the soil body, vacuum pressure is equivalent to 5m depth up to 90kPa or more
The weight stress of soil at degree also means that 5m depth, and the withdrawal resistance of soil nailing can be increased to 2 times or so, or keep phase
When with withdrawal resistance, the length of soil nailing can be greatly reduced；
(3) the acquisition device simple of vacuum pressure is cheap, and energy-output ratio is small, compared to the soil nailing cost of armored concrete
It is very low, also greatly reduce carbon emission.
Detailed description of the invention
Fig. 1 is vacuum soil nailing schematic diagram of the invention；
Fig. 2 be section of holding one's breath of the invention be it is solid hold one's breath concrete when the vacuum soil nailing schematic diagram selected；
Fig. 3 is vacuum soil nailing working state schematic representation of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1 to Figure 3, the present invention includes being reinforced body 1, section of holding one's breath 2, vacuum zone 3, vacuum source 4, vacuum pump 5, true
Blank pipe 6, connecting tube 7, vacuum meter 8 and pressure stabilizing chamber 9.Vacuum soil nailing includes vacuum zone 3 and 2 two parts of section of holding one's breath, inclination insertion
It being reinforced in body 1, wherein vacuum zone 3 is located at 2 lower section of section of holding one's breath, and the extension end of section of holding one's breath 2 exceeds the side wall for being reinforced body 1,
Extension end is connected with vacuum tube 6, and is connect by vacuum tube 6 with vacuum source 4, and vacuum zone 3 is made to be in vacuum shape in working stage
State, and induce surrounding soil and be in vacuum state, vacuum tube 6 is equipped with valve, for controlling the opening and closing of vacuum source 4.
As shown in Fig. 2, the steel pipe that tube wall is held one's breath can be selected in section 2 of holding one's breath, at this point, to select tube wall to set foraminate for vacuum zone 3
Steel pipe, the aperture of aperture are less than 3 times of surrounding soil average grain diameter between 0.5-2mm, prevent the soil particle of surrounding into
Entering, section of holding one's breath 2 welds together with vacuum zone 3, when the soil body is the fine grained soils such as clay, silt, the surrounding package one of vacuum zone 3
Layer geotextiles, and geotextiles are arranged in the inside of vacuum zone 3 more preferably.
As shown in figure 3, when section 2 of holding one's breath select it is solid hold one's breath concrete when, vacuum zone 3 selects ventilative concrete, concrete
It continuously fills, or fills time interval less than 3 hours, vacuum tube 6 extends in hold one's breath section 2 and vacuum zone 3 at this time, wherein closes
Vacuum tube 6 in gas section 2 should be arranged at the center for section 2 of holding one's breath, and steel pipe, pvc pipe etc. can be selected in vacuum tube 6, and vacuum tube 6 enters true
The length of dead band 3 is not less than 5cm, ensures vacuum conduction.
Section of holding one's breath 2 should have certain length, and when being reinforced body 1 is sand, length is not less than 4m；When being reinforced body
1 be silt when, length be not less than 2m；Be reinforced body 1 be clay when, length be not less than 1m.
As shown in Figure 1, vacuum source 4 includes vacuum pump 5, connecting tube 7, vacuum meter 8 and pressure stabilizing chamber 9, vacuum pump 5 passes through connection
Pipe 7 is connect with pressure stabilizing chamber 9, and connecting tube 7 is equipped with valve, and for controlling the opening and closing of pressure stabilizing chamber 9, pressure stabilizing chamber 9 is equipped with vacuum meter
8.Setting pressure stabilizing chamber 9 can make vacuum degree more stable, and effect is more preferable, and the volume of pressure stabilizing chamber 9 is preferably to be reinforced 1 volume of body
3%-10%.Vacuum meter 8 is used to monitor the vacuum degree of pressure stabilizing chamber 9, and vacuum pump 5 selects conventional vacuum pump or jet pump.Work as vacuum
When below 3 water levels located underground of section, jet pump is selected, vacuum pressure is not less than 90kPa.
Vacuum nail Construction method of the invention, comprising the following steps:
(1) prepare soil nailing；
(2) soil nailing is squeezed into and is reinforced body；
(3) vacuum source is connected, is vacuumized, the rate that air pressure declines when vacuumizing is not more than 5kPa/ hours, steady operation shape
The vacuum degree of vacuum zone is greater than 85% under state.；
(4) when no longer needing vacuum, stop vacuumizing, remove vacuum source, the soil nailing for needing to recycle is extracted into cleaning.
Vacuum soil nailing of the invention can replace the soil nailing in existing soil-nail wall support and form vacuum soil-nail wall support, can also
It is used in combination, such as diaphram wall, steel sheet pile, campshed, is only applicable in a manner of the existing soil nailing of replacement and other pattern foundation pit supporting structures
Weak soil, slightly close silt, bankets at loose or slightly close sand.
Claims (8)
1. a kind of vacuum soil nailing, which is characterized in that including vacuum zone and hold one's breath section, the vacuum zone and section of holding one's breath be respectively positioned on by
In reinforcing body, the vacuum zone is located at below section of holding one's breath, and the extension end of the section of holding one's breath is connected with vacuum tube, and passes through vacuum
Pipe is connect with vacuum source, and vacuum zone is made to be in vacuum state in working stage.
2. vacuum soil nailing according to claim 1, which is characterized in that it is described hold one's breath steel pipe that section selects tube wall to hold one's breath or
Solid concrete of holding one's breath.
3. vacuum soil nailing according to claim 1, which is characterized in that the vacuum zone selects tube wall to set foraminate steel
Pipe or ventilative concrete.
4. vacuum soil nailing according to claim 3, which is characterized in that the aperture of the steel pipe aperture between 0.5-2mm it
Between, and less than 3 times of surrounding soil average grain diameter, when the soil body is the fine grained soils such as clay, silt, the surrounding package one of vacuum zone
Layer geotextiles.
5. vacuum soil nailing according to claim 1, which is characterized in that the section of holding one's breath selects solid concrete of holding one's breath
When, section of holding one's breath is interior to be arranged vacuum tube, and the vacuum tube extends in vacuum zone.
6. vacuum soil nailing according to claim 1 or 5, which is characterized in that the vacuum tube enters the length of vacuum zone
Not less than 5cm.
7. vacuum soil nailing according to claim 6, which is characterized in that the vacuum tube selects steel pipe or pvc pipe.
8. a kind of construction method of vacuum soil nailing, which comprises the following steps:
(1) prepare soil nailing；
(2) soil nailing is squeezed into and is reinforced body；
(3) vacuum source is connected, is vacuumized；
(4) when no longer needing vacuum, stop vacuumizing, remove vacuum source, the soil nailing for needing to recycle is extracted into cleaning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910361326.XA CN110055977A (en) | 2019-04-30 | 2019-04-30 | Vacuum soil nailing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910361326.XA CN110055977A (en) | 2019-04-30 | 2019-04-30 | Vacuum soil nailing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110055977A true CN110055977A (en) | 2019-07-26 |
Family
ID=67321833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910361326.XA Pending CN110055977A (en) | 2019-04-30 | 2019-04-30 | Vacuum soil nailing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110055977A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101462838B1 (en) * | 2014-06-20 | 2014-11-17 | 서월식 | A cooker lid having the vacuum function |
| CN207143967U (en) * | 2017-08-10 | 2018-03-27 | 许健书 | A kind of anchor pole suitable for soft soil foundation |
| CN109629566A (en) * | 2019-01-16 | 2019-04-16 | 宁夏大学 | A kind of vacuum drainage anchor pole and its construction method |
-
2019
- 2019-04-30 CN CN201910361326.XA patent/CN110055977A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101462838B1 (en) * | 2014-06-20 | 2014-11-17 | 서월식 | A cooker lid having the vacuum function |
| CN207143967U (en) * | 2017-08-10 | 2018-03-27 | 许健书 | A kind of anchor pole suitable for soft soil foundation |
| CN109629566A (en) * | 2019-01-16 | 2019-04-16 | 宁夏大学 | A kind of vacuum drainage anchor pole and its construction method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190726 |
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| RJ01 | Rejection of invention patent application after publication |