CN112629723A - High-precision multi-depth air bag type soil pressure gauge - Google Patents
High-precision multi-depth air bag type soil pressure gauge Download PDFInfo
- Publication number
- CN112629723A CN112629723A CN202011347807.4A CN202011347807A CN112629723A CN 112629723 A CN112629723 A CN 112629723A CN 202011347807 A CN202011347807 A CN 202011347807A CN 112629723 A CN112629723 A CN 112629723A
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- air
- soil pressure
- air bag
- transfer interface
- pressure gauge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0004—Force transducers adapted for mounting in a bore of the force receiving structure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
- G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
- G01L11/006—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces hydraulic or pneumatic counterbalancing forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/086—Means for indicating or recording, e.g. for remote indication for remote indication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a high-precision multi-depth air bag type soil pressure gauge which comprises a rod body with a cavity and an air pump, wherein a transfer interface and a top rotary table positioned above the transfer interface are fixedly arranged at the upper port of the rod body, a plurality of one-way ports are formed in the wall surface of the rod body at intervals along the vertical direction, air bags are arranged at the one-way ports, the air bags are respectively communicated with corresponding air passages in the transfer interface through air guide pipes, the air pump is communicated with an opening in the top rotary table through an air conveying pipe, and the opening in the top rotary table is communicated with any air passage in the transfer interface in a matching manner. The invention has the advantages that: the high-pressure rubber air bag capable of being repeatedly inflated and deflated is used for measuring the soil pressure, and compared with a traditional soil pressure box, the high-pressure rubber air bag has the characteristics of strong repeatability, high precision, no electromagnetic interference, good waterproof effect, small disturbance to a soil body and the like; the transfer interface and the top turntable can enable the external air pressure equipment to be connected with air ducts at different depths of the air bags according to measurement requirements.
Description
Technical Field
The invention belongs to the field of geotechnical engineering test detection, and particularly relates to a high-precision multi-depth air bag type soil pressure gauge.
Background
In various geotechnical engineering, such as foundation ditch excavation, tunnel construction, embankment construction etc., often can need to use various soil pressure testing arrangement to monitor the change condition of construction and the soil pressure after the worker. The most common soil pressure testing device in the market is a soil pressure cell, generally, one soil pressure cell can only measure the soil pressure at a certain depth, a plurality of soil pressure cells need to be arranged for a plurality of measuring points, when the soil pressure cells are buried by adopting a common drilling or hole digging method, a plurality of holes often need to be excavated, only one soil pressure cell can be buried in one hole, and the drilled holes can not be reused generally; the excessive drilling holes and holes can affect the original stress state of the soil body, the soil pressure measured by the soil pressure cell can be distorted, and the increase of the construction workload and the complexity of the use and maintenance of equipment are inevitably caused; and the embedding quality of the soil pressure cell directly influences the testing precision. When the soil body has larger displacement, the soil pressure directly buried in the soil body can also move along with the soil body, and the measurement result can be influenced. Meanwhile, the length of the lead of the soil pressure cell is increased along with the increase of the depth, and when the soil body is locally deformed, the lead is easy to damage. The soil pressure cell generally adopts the sensor of signal of telecommunication to carry out data transmission, and this type of sensor receives electromagnetic interference to influence greatly, and water-proof effects is poor, and long-term use stability is poor.
In conclusion, the accuracy of the soil pressure cell measurement result is greatly influenced by construction factors and environmental factors.
Disclosure of Invention
The invention aims to provide the high-precision multi-depth air bag type soil pressure gauge according to the defects of the prior art, the soil pressure gauge detects the soil pressure by arranging a plurality of air bags at intervals at different depths in a rod body, so that the soil pressure can be accurately identified, and the soil pressures at different depths can be detected.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a many degree of depth of high accuracy gasbag formula soil pressure meter, its characterized in that soil pressure meter is including a body of rod and the air pump that has the cavity, the last port of the body of rod is fixed to be provided with a transfer interface and to be located the top carousel of transfer interface top, it is equipped with a plurality of one-way mouths to separate along vertical direction on the wall of the body of rod, one-way mouth department is provided with the gasbag, each the gasbag respectively through the air duct with correspond the air flue in the transfer interface is linked together, the air pump through the gas-supply pipe with opening on the top carousel is linked together, opening on the top carousel with arbitrary air flue matching intercommunication on the transfer interface.
A semi-cylindrical shell and a slidable steel plate assembly which are positioned in the rod body are arranged at the one-way opening, and the air bag is arranged between the semi-cylindrical shell and the slidable steel plate assembly; and two ends of the semi-cylindrical shell are respectively welded and fixed on the upper edge part and the lower edge part of the one-way port on the wall surface of the rod body.
The slidable steel plate assembly consists of two steel plates which are connected through a rolling bearing; the tail ends of the steel plates are respectively provided with a pulley, the upper edge part and the lower edge part of the one-way opening are respectively provided with a track for the pulleys to overlap and slide, and the track is provided with a baffle plate for limiting the sliding distance of the pulleys.
The semi-cylindrical shell is provided with a through hole for the air duct to penetrate through.
And a plurality of fixing parts are arranged in the cavity of the rod body at intervals along the vertical direction so as to fix the air duct and the inner wall surface of the rod body.
The upper surface of top carousel is fixed and is provided with a twist grip to make under the twist grip drive top carousel rotates around the center, adjusts opening on the top carousel with correspond on the transfer interface the air flue phase-match intercommunication.
And rubber sealing rings are arranged at the top and the bottom of each air passage in the middle adapter.
And the air pump is provided with an air pressure gauge.
The invention has the advantages that:
(1) the high-pressure rubber air bag capable of being repeatedly inflated and deflated is used for measuring the soil pressure, and compared with a traditional soil pressure box, the high-pressure rubber air bag has the characteristics of strong repeatability, high precision, no electromagnetic interference, good waterproof effect, small disturbance to a soil body and the like;
(2) the arrangement of the one-way port ensures that the air bag can not be expanded continuously after the air pressure provided by the air bag is balanced with the soil pressure at the baffle plate, so that the size of the soil pressure can be accurately identified; the shell of the rod body and the shell around the air bag provide a better protection effect for the air bag, so that the air bag is prevented from being damaged by hard objects and sharp objects, and meanwhile, a plurality of air bags can be arranged in one rod body, so that the measurement efficiency is improved, and the workload required by construction is reduced;
(3) the transfer interface and the top turntable can enable the external air pressure equipment to be connected with air ducts at different depth air bags according to measurement requirements, and the transfer interface and the top turntable have the advantages of convenience in transfer and simplicity in measurement.
Drawings
FIG. 1 is a schematic structural view of a high-precision multi-depth air bag type soil pressure gauge according to the present invention;
FIG. 2 is a schematic plan view of the top turntable of the present invention;
FIG. 3 is a schematic plan view of a transfer interface according to the present invention;
FIG. 4 is a schematic view of the top of the rod body according to the present invention;
FIG. 5 is a schematic view of the slidable steel plate assembly when the airbag is not inflated according to the present invention;
FIG. 6 is a schematic view showing the state of the slidable steel plate assembly when the airbag of the present invention is inflated.
Detailed Description
The features of the present invention and other related features are described in further detail below by way of example in conjunction with the following drawings to facilitate understanding by those skilled in the art:
referring to fig. 1-6, the symbols in the drawings are: the air-pressure gauge comprises a rod body 1, an air guide pipe 2, an air bag 3, a one-way port 4, a fixing piece 5, a semi-cylindrical shell 6, a transfer port 7, a top turntable 8, an air conveying pipe 9, an air pump 10, a rolling bearing 11, a pulley 12, a steel plate 13, a baffle plate 14, a rubber sealing ring 15, an air passage 16, a display screen 17, an air pressure gauge 18, a rotating handle 19 and a track 20.
Example (b): as shown in fig. 1-6, the present embodiment specifically relates to a high-precision multi-depth air bag type soil pressure gauge, the main body of the soil pressure gauge includes a rod body 1 and an air pump 10, the rod body 1 is disposed in a soil body at a certain depth when in use, the rod body 1 is a hollow rod body with a cavity, a plurality of one-way ports 4 are disposed on the rod body 1 at intervals along a vertical direction, and an air bag 3 is disposed at each one-way port 4; a transfer interface 7 is fixedly arranged at the position of the upper port of the rod body 1, and each air bag 3 is respectively communicated with an air passage 16 in the transfer interface 7 through an air duct 2; a top turntable 8 is tightly attached to the upper surface of the transfer interface 7; the top rotary disc 8 is provided with an opening and is communicated with the gas pipe 9 on the gas pump 10, and the gas pipe 9 can be matched and communicated with the corresponding gas passage 16 on the transfer interface 7 by rotating the top rotary disc 8.
As shown in fig. 1-6, a rod body 1 is manufactured on the ground, and the length of the rod body 1 is determined by the burial depth of a bottom air bag 3; a plurality of one-way ports 4 are arranged on the wall surface of the rod body 1 at intervals along the vertical direction, and 5 one-way ports 4 are specifically arranged in the embodiment and are respectively a, b, c, d and e in the schematic diagram; a semi-cylindrical shell 6 and a slidable steel plate component are arranged at the position of the one-way port 4, and the air bag 3 is arranged between the semi-cylindrical shell and the slidable steel plate component; two ends of the semi-cylindrical shell 6 are respectively welded and fixed on the upper edge part and the lower edge part of the one-way port 4, namely the wall surface of the rod body 1, and the semi-cylindrical shell 6 is also provided with a through hole so that the air duct 2 penetrates through and is communicated with the air bag 3; the slidable steel plate assembly comprises two steel plates 13, and the two steel plates 13 are connected through a rolling bearing 11, so that the consumption of friction resistance can be reduced, and the steel plates 13 can be pushed to move easily by the soil pressure and the pressure of the air bag 3; the end of each steel plate 13 is provided with a pulley 12, and at the same time, the upper edge and the lower edge of the one-way opening 4 are respectively provided with a rail 20 in which the pulley 12 can be lapped and slid, and the two ends of the rail 20 are respectively provided with a baffle plate 14 for limiting the sliding distance of the pulley 12, as shown in fig. 5 and 6.
As shown in fig. 5 and 6, when the air bag 3 is not inflated, the internal pressure thereof is much lower than the external soil pressure, so that under the action of the soil pressure, the steel plate 13 drives the pulley 12 to move towards the proximal end of the rail 20, and due to the restraining action of the steel baffle plate 14, the pulley 12 can not slide inwards when sliding to the inner baffle plate 14, thereby avoiding the damage to the air bag 3 caused by the inward continuous extrusion of the air bag 3 by the rolling bearing 11 and the steel plate 13. When the air bag 3 is inflated, the internal air pressure of the air bag is gradually increased, the volume of the air bag is gradually expanded, the rolling bearing 11 and the steel plate 13 are pushed to move towards the outside of the rod body 1, the pulley 12 slides towards the far end of the track 20 at the moment, the steel baffle 14 is also arranged at the far end of the track 20, when the pulley 12 reaches the far end, the volume of the air bag 3 is just filled with the whole semicircular shell 6, the air bag 3 reaches a preset state at the moment, the internal air pressure of the air bag 3 is balanced with the soil pressure, the air bag can continuously rise in pressure, the pulley 12 cannot continuously slide towards the far end due to the constraint effect of the steel baffle 14, therefore, the air bag 3 cannot continuously expand, and the unidirectional constraint.
As shown in fig. 1-6, the transfer interface 7 is fixedly disposed at the top end of the rod body 1, the transfer interface 7 is provided with a plurality of air ducts 16, the number of the air ducts 16 corresponds to the number of the air ducts 2, and each air duct 2 extends from the airbag 3 into the transfer interface 7 and is communicated with the corresponding air duct 16 therein, it should be noted that, in the rod body 1, the air ducts 2 are restrained by the fixing members 5 at regular intervals, so as to avoid excessive vibration or shaking during subsequent installation and use, which affects air tightness. The top turntable 8 is closely attached to the upper surface of the transfer interface 7, a rotating handle 19 is fixedly arranged on the upper surface of the top turntable 8, the top turntable 8 can rotate around the center of the top turntable 8 by rotating the rotating handle 19, an opening is formed in the top turntable 8, one end of a gas pipe 9 is connected to the opening, the other end of the gas pipe 9 is communicated with an air pump 10 on the ground, the air pump 10 is connected with a barometer 18 and used for monitoring the air pressure condition, so that the air pump 10 and the airbag 3 to be measured form a complete gas guide pipeline, and the air pump 10, the barometer 18, the gas pipe 9, the top turntable 8, the transfer interface 7, the gas channel 16 and the gas guide pipe 2 connected with the airbag 3 are sequentially arranged from top to bottom.
It should be noted that rubber sealing rings 15 are further disposed at the top and the bottom of the air passage 16 to ensure the air tightness between the air duct 2 and the air passage 16, and between the air passage 16 and the air pipe 9, so as to prevent air leakage during the pressurization process of the air pump. Be provided with display screen 17 on top carousel 8, the opening and close of control mainboard connection control rubber seal 15 in the display screen 17 opens and shuts, and when the opening of top carousel 8 did not go to air flue 16, rubber seal 15 at air flue 16 top was in the state of closing, for showing corresponding figure on the display screen, the switch was in the OFF state. As shown in fig. 3, the schematic diagram is that when the rotating handle 19 is pulled to make the opening of the top turntable 8 rotate to the air passage 16, when the opening of the top turntable 8 rotates to the position above the air passage corresponding to the airbag 3 a in the diagram, the number a appears ON the display screen, which proves that the opening corresponds to the airbag 3 a at this time, the rubber seal ring 15 can be opened by pressing the ON key ON the switch, the whole air guide pipe 2 is in a communicated state, the airbag 3 can be inflated by the air pump 10, and when the airbag 3 reaches a preset state, the air pressure value ON the air pressure meter 18 is read, that is, the soil pressure value at the depth corresponding to the airbag 3.
As shown in fig. 1-6, after the air bag type soil pressure gauge is manufactured, a hole is drilled in a test site, after the air bag type soil pressure gauge is buried in a preset position, according to measurement needs, an air pipe 9 of an air pump 10 is connected into an air passage 16 of a transfer interface 7 corresponding to an air bag 3 to be measured through a top turntable 8, then the air pump 10 is started, air is inflated into the air bag 3, in the air pressure lifting process, a steel plate 13 can gradually move outwards, when the air bag 3 reaches a preset state, the air pressure value displayed by an air pressure meter 18 is the soil pressure value of the measured depth, the pressure curve recorded by the air pressure meter 18 at the moment should have a sudden change, and the air pressure value recorded at the moment is the soil pressure of the corresponding depth.
Claims (8)
1. The utility model provides a many degree of depth of high accuracy gasbag formula soil pressure meter, its characterized in that soil pressure meter is including a body of rod and the air pump that has the cavity, the last port of the body of rod is fixed to be provided with a transfer interface and to be located the top carousel of transfer interface top, it is equipped with a plurality of one-way mouths to separate along vertical direction on the wall of the body of rod, one-way mouth department is provided with the gasbag, each the gasbag respectively through the air duct with correspond the air flue in the transfer interface is linked together, the air pump through the gas-supply pipe with opening on the top carousel is linked together, opening on the top carousel with arbitrary air flue matching intercommunication on the transfer interface.
2. A high precision multi-depth air bag type soil pressure gauge according to claim 1, wherein said one-way port is provided with a semi-cylindrical housing and a slidable steel plate assembly in said rod body, said air bag being provided between said semi-cylindrical housing and said slidable steel plate assembly; and two ends of the semi-cylindrical shell are respectively welded and fixed on the upper edge part and the lower edge part of the one-way port on the wall surface of the rod body.
3. The high-precision multi-depth air bag type soil pressure gauge according to claim 2, wherein the slidable steel plate assembly is composed of two steel plates, and the two steel plates are connected through a rolling bearing; the tail ends of the steel plates are respectively provided with a pulley, the upper edge part and the lower edge part of the one-way opening are respectively provided with a track for the pulleys to overlap and slide, and the track is provided with a baffle plate for limiting the sliding distance of the pulleys.
4. A high accuracy multi-depth air bag type soil pressure gauge according to claim 2, wherein said semi-cylindrical housing is provided with a through hole for said air duct to pass through.
5. The high-precision multi-depth air bag type soil pressure gauge according to claim 1, wherein a plurality of fixing pieces are arranged in the cavity of the rod body at intervals along the vertical direction so as to fix the air guide tube with the inner wall surface of the rod body.
6. The high-precision multi-depth air bag type soil pressure gauge according to claim 1, wherein a rotating handle is fixedly arranged on the upper surface of the top rotating disc so that the top rotating disc can rotate around the center under the driving of the rotating handle, and an opening on the top rotating disc is adjusted to be in matched communication with the corresponding air passage on the transfer interface.
7. A high accuracy multi-depth air bag type soil pressure gauge according to claim 1, wherein each of the top and bottom of the air passage in the middle adapter is provided with a rubber sealing ring.
8. A high precision multi-depth air bag type soil pressure gauge according to claim 1, wherein a barometer is provided on said air pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011347807.4A CN112629723B (en) | 2020-11-26 | 2020-11-26 | High-precision multi-depth air bag type soil pressure gauge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011347807.4A CN112629723B (en) | 2020-11-26 | 2020-11-26 | High-precision multi-depth air bag type soil pressure gauge |
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| CN112629723B CN112629723B (en) | 2022-08-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114088272A (en) * | 2021-11-08 | 2022-02-25 | 郑州大学 | Spherical air bag type soil pressure multi-point testing device |
| CN114674475A (en) * | 2022-03-11 | 2022-06-28 | 重庆地质矿产研究院 | Device and method for monitoring internal stress of large landslide rock-soil body |
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| CN110044529A (en) * | 2019-03-28 | 2019-07-23 | 天津大学 | A kind of outer lateral earth pressure measurement method of shield tunnel |
| CN111238723A (en) * | 2020-03-25 | 2020-06-05 | 上海隧道工程有限公司 | Detection device and detection method for shield soil pressure sensor |
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| CN103835277A (en) * | 2012-11-22 | 2014-06-04 | 同济大学 | Inflatable type multipoint displacement meter anchor head for soft soil stratums |
| CN104458445A (en) * | 2014-12-08 | 2015-03-25 | 河南城建学院 | Shear test device and shear test method in in-situ soil body pore |
| CN206161339U (en) * | 2016-10-25 | 2017-05-10 | 招商局重庆交通科研设计院有限公司 | Pass through tunnel testing system in collecting space area |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114088272A (en) * | 2021-11-08 | 2022-02-25 | 郑州大学 | Spherical air bag type soil pressure multi-point testing device |
| CN114674475A (en) * | 2022-03-11 | 2022-06-28 | 重庆地质矿产研究院 | Device and method for monitoring internal stress of large landslide rock-soil body |
| CN114674475B (en) * | 2022-03-11 | 2024-02-23 | 重庆地质矿产研究院 | Device and method for monitoring internal stress of large landslide rock-soil body |
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| CN112629723B (en) | 2022-08-16 |
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