CN2754077Y - Foundation soil vacuum degree sensor - Google Patents
Foundation soil vacuum degree sensor Download PDFInfo
- Publication number
- CN2754077Y CN2754077Y CN 200420080865 CN200420080865U CN2754077Y CN 2754077 Y CN2754077 Y CN 2754077Y CN 200420080865 CN200420080865 CN 200420080865 CN 200420080865 U CN200420080865 U CN 200420080865U CN 2754077 Y CN2754077 Y CN 2754077Y
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- CN
- China
- Prior art keywords
- pressure chamber
- vacuum
- soil body
- foundation soil
- sensor
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- 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
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to a vacuum degree sensor of a foundation soil body, which is characterized in that a sealed cone head is arranged, the back part of the cone head is fixed with a pressure chamber, the wall of the front section of the pressure chamber is provided with a plurality of through holes and is provided with a gas permeation sludge separation layer, the back section of the pressure chamber is provided with a seal section, the back part of the pressure chamber is connected with a tail pipe, the pressure chamber is connected with a vacuum meter through a hose, and the gas permeation sludge separation layer is one or multiple kinds of fibrebonded cloth, a permeable hose and a permeable abrasive wheel. The seal section of the pressure chamber adopts the outer diameter which is identical with that of a guide flare head, the Length is bigger than the minimum distance from a measurement point to a vacuum drainage body in the vicinity and the connection position of the pressure chamber and the hose is provided with an inner seal block. The utility model fills the blank of the technique of the reinforcement processing of a soft soil foundation, and provides the applicable sensor for the vacuum preloading technology for the reinforcement of the soft soil foundation. The sensor has the advantages that the installation and the burying are reliable and convenient, the consistency of a measurement head and the vacuum pressure of a measured soil body can be ensured and the influence which is caused by the intervention of the measurement head to the external environment of a measurement point can be reduced.
Description
Technical field
The utility model relates to a kind of soil body vacuum measurement sensor that is used for soft foundation experimental study and construction monitoring.
Background technology
Vacuum sensor is a device of measuring the vacuum tightness of soil body specific location point.In ground engineering, a kind of technique of soft soil foundation treatment is arranged in the consolidation process technology of soft soil foundation: the ground that needs reinforcement is sealed with plastic foil, vacuumize then, to strengthen the density of ground itself.When taking this vacuum preloading that soft soil foundation is carried out consolidation process, must monitor the vacuum tightness response condition of some feature locations, with the effect in the supervision and check ground processing procedure.But the corresponding sensor that also is not fit to this supervision and check in the prior art at present.Owing to there is not a reliable apparatus, the general in the past method of wrapping geotextile on the simple hollow tube head or brown skin that adopts is observed, and not only installs to bury underground very difficultly, and measuring point is also very unreliable with isolation on every side.The reliability of measurement result is difficult to guarantee.
Summary of the invention
The purpose of this utility model is to provide a kind of corresponding sensor for technique of soft soil foundation treatment that reinforced soft soil ground is handled, to guarantee gauge head and tested soil body vacuum pressure consistance, reduce gauge head as far as possible and get involved the influence that the measured point external environment condition is caused, consider to install bury underground reliable and easy simultaneously.
The method that realizes these targets is: the foundation soil body vacuum sensor, be provided with the cone head of sealing, and cone head back is fixed with the pressure chamber, has some through holes on the wall of pressure chamber's leading portion, and is provided with ventilative mud separating layer; The back segment of pressure chamber is airtight section, and the back, pressure chamber is connected with tail pipe, and the pressure chamber is connected with vacuum meter by flexible pipe.
During use, above-mentioned foundation soil body vacuum sensor arrives near the measurement point by boring, utilize the cone head of its front end to be pressed into the soil body then, and closely contact with the soil body, through hole on the Pneumatic pipe cleaner excess pressure chamber leading portion in the soil body communicates with the pressure chamber, and pass to tensimeter by flexible pipe, can measure the soil pressure data.
Ventilative mud separating layer described in the above scheme can adopt nonwoven fabrics, Water penetrative flexible pipe, permeable emery wheel etc., can also adopt two or more identical or different ventilative mud separating layers simultaneously;
Described " some through holes " can be the circular hole of 1.5～2.5mm, and its quantity (or distribution density) can adopt 20～30.
The utility model has following prioritization scheme:
1, airtight section of the pressure chamber (no through hole area) adopts and the identical external diameter of guiding conehead, and its length is greater than the minor increment of measuring point near vacuum drainage body, so that vacuum pressure can not import the pressure chamber into along the gauge head outer wall by the boring of burying gauge head underground.
2, the junction of pressure chamber and flexible pipe is provided with interior sealing block, with the impermeability that guarantees to connect.
The utility model has been filled up a blank in the consolidation process technology of soft soil foundation, for the technique of soft soil foundation treatment of reinforced soft soil ground provides the sensor that is suitable for, this sensor install bury underground reliable, easy; Use this sensor can guarantee gauge head and tested soil body vacuum pressure consistance, and can reduce gauge head and get involved the influence that the measured point external environment condition is caused.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
Embodiment 1, with reference to Fig. 1: the foundation soil body vacuum sensor, front end is the cone head 2 of sealing, the whole soft foundation soil body that inserts of guiding also arrives the precalculated position point.Pressure chamber 1 follows conehead and fixing to be threaded closely.The through hole 6 of the even placement diameter 2.0mm of pressure chamber's leading portion is so that the pressure chamber is communicated with consistent to keep-up pressure with surrounding soil.Through hole is conveniently arranged with tube wall and is no less than 20 and is advisable.Through hole section outer wall wraps tightly one deck non-woven geotextile 7 or permeable emery wheel, and inwall tightly serves as a contrast isometrical Water penetrative flexible pipe, and the common bilayer that forms can not enter the pressure chamber every soil layer to guarantee earth.Airtight section (no through hole area) of pressure chamber and the external diameter identical (φ 30mm) that guides conehead, length is greater than the minor increment of measuring point near vacuum drainage body, so that vacuum pressure can not import the pressure chamber into along the gauge head outer wall by the boring of burying gauge head underground.Therefore need in boring, not guarantee sealing by the landfill sealing material.Adopt 5, one connections of φ 6mm nylon tube to be communicated with the pressure chamber, the other end connects pressure vacuum gauge, obtains the vacuum tightness of the soil body by the vacuum pressure of gaging pressure chamber.The junction of pressure chamber and flexible pipe is provided with interior sealing block 3.The afterbody of gauge head has designed and the convenient tail pipe 4 that is connected of boring mechanic, and utilization is drawn drilling machine and gauge head accurately can be delivered to predetermined depth, installs and buries underground conveniently.
Claims (5)
1, a kind of foundation soil body vacuum sensor is characterized in that, is provided with the cone head of sealing, and cone head back is fixed with the pressure chamber, has some through holes on the wall of pressure chamber's leading portion, and is provided with ventilative mud separating layer; The back segment of pressure chamber is airtight section, and the back, pressure chamber is connected with tail pipe, and the pressure chamber is connected with vacuum meter by flexible pipe.
According to the described foundation soil body vacuum sensor of claim 1, it is characterized in that 2, described ventilative mud separating layer is one or more in nonwoven fabrics, Water penetrative flexible pipe, the permeable emery wheel.
3, according to claim 1 or 2 described foundation soil body vacuum sensors, it is characterized in that, airtight section employing of pressure chamber and the identical external diameter of guiding conehead, its length is greater than the minor increment of measuring point near vacuum drainage body.
4, according to the described foundation soil body vacuum sensor of claim 3, it is characterized in that the junction of pressure chamber and flexible pipe is provided with interior sealing block.
5, according to claim 1 or 2 described foundation soil body vacuum sensors, it is characterized in that the junction of pressure chamber and flexible pipe is provided with interior sealing block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420080865 CN2754077Y (en) | 2004-11-05 | 2004-11-05 | Foundation soil vacuum degree sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420080865 CN2754077Y (en) | 2004-11-05 | 2004-11-05 | Foundation soil vacuum degree sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2754077Y true CN2754077Y (en) | 2006-01-25 |
Family
ID=35926185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420080865 Expired - Fee Related CN2754077Y (en) | 2004-11-05 | 2004-11-05 | Foundation soil vacuum degree sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2754077Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564676A (en) * | 2012-02-12 | 2012-07-11 | 吉林大学 | Penetrating-stretching type pore water pressure measurement device and measurement method thereof |
| CN108918023A (en) * | 2018-08-23 | 2018-11-30 | 浙江省水利水电勘测设计院 | A kind of soil under vacuum preloading vacuum degree monitoring device and method |
| CN114777995A (en) * | 2022-04-20 | 2022-07-22 | 交通运输部天津水运工程科学研究所 | Single-hole multipoint deep soil body vacuum degree monitoring device and method |
-
2004
- 2004-11-05 CN CN 200420080865 patent/CN2754077Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564676A (en) * | 2012-02-12 | 2012-07-11 | 吉林大学 | Penetrating-stretching type pore water pressure measurement device and measurement method thereof |
| CN102564676B (en) * | 2012-02-12 | 2014-08-13 | 吉林大学 | Penetrating-stretching type pore water pressure measurement device and measurement method thereof |
| CN108918023A (en) * | 2018-08-23 | 2018-11-30 | 浙江省水利水电勘测设计院 | A kind of soil under vacuum preloading vacuum degree monitoring device and method |
| CN114777995A (en) * | 2022-04-20 | 2022-07-22 | 交通运输部天津水运工程科学研究所 | Single-hole multipoint deep soil body vacuum degree monitoring device and method |
| CN114777995B (en) * | 2022-04-20 | 2024-04-26 | 交通运输部天津水运工程科学研究所 | Single-hole multipoint deep soil body vacuum degree monitoring device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |