CN206891531U - Underground water level measurement device under a kind of vacuum preloading for considering temperature change - Google Patents
Underground water level measurement device under a kind of vacuum preloading for considering temperature change Download PDFInfo
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- CN206891531U CN206891531U CN201720729087.5U CN201720729087U CN206891531U CN 206891531 U CN206891531 U CN 206891531U CN 201720729087 U CN201720729087 U CN 201720729087U CN 206891531 U CN206891531 U CN 206891531U
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Abstract
The utility model discloses underground water level measurement device under a kind of vacuum preloading for considering temperature change, including both ends to be respectively equipped with the water level pipe of top cover and bottom；The medial surface of bottom is provided with the water-level and water-temperature sensor being connected with reception device, and the downside wall of water level pipe is provided with some filter openings.The present apparatus is embedded at 1 meter of underground, with isolated from atmosphere, ensure that vacuum in water level pipe, water level with it is consistent in surrounding soil, effectively prevent that vacuum pressure is directly delivered to inside water level pipe under film, avoid the situation for causing water level pipe to poke diaphragm seal due to soil body sedimentation, it ensure that the seal of vacuum preloading so that measurement result is more accurate.By the measuring method of water-level and water-temperature sensor, its principle and apparatus structure are simple and convenient to operate, implement efficiently, to carry temperature-compensating, measurement is precise and stable feasible, has very strong practicality and wide applicability.
Description
Technical field
It the utility model is related to a kind of underground water level measurement device, and in particular to a kind of vacuum preloading for considering temperature change
Lower underground water level measurement device.
Background technology
In recent years, the method for vacuum pre-press reinforcing foundation is largely used in the engineering in China, but on vacuum preloading
During level of ground water situation of change there are still larger dispute, reason be traditional measuring method be difficult to reflect vacuum it is pre-
Real level of ground water situation during pressure.In Practical Project, conventional method has often set open water in reinforcing area
Position pipe, is measured with water-level gauge.Because the water surface is directly acted on by atmospheric pressure in measurement process middle pipe, necessarily cause
Water level is less than actual level of ground water in surrounding soil in pipe, and the result thus measured can not reflect real underground water place value.
Therefore, a kind of method that level of ground water is measured in the case of sealing, do not lose vacuum is found, for underground during vacuum preloading
The research important in inhibiting of SEA LEVEL VARIATION.
Before this, such as Chinese patent（Number of patent application:201510323058.4）Disclose a kind of measurement vacuum preloading
The device of lower level of ground water, the principle of device are 4 electric contacts of setting on water-level probe, form two control loops, electricity connects
Point can change the closure state in loop when being contacted with the water surface, so as to control rotating motor to rise or fall so that water level is visited
Head is remained on the water surface, and water surface elevation is measured according to unwrapping wire length between the probe and motor of instrument record.This method knot
Structure is complicated, and water level pipe upper end passes diaphragm seal, though preventing gas leakage using encapsulant, its sealing effectiveness still needs business
Discuss, and do not consider that temperature influences.Such as Chinese patent（Number of patent application：201520607036.6）It is pre- to disclose a kind of measurement vacuum
The device of level of ground water is depressed, insulating bar is provided with its water level pipe, is tied with insulating bar on resistance wire and bar and is cased with becoming with waterside
Change and the insulation floating block of free floating, the resistance wire resistance for accessing closed-loop path can be caused when floating block fluctuates with SEA LEVEL VARIATION
Value is changed, and level of ground water height is can be derived from using relation between the two.This method is difficult to ensure that resistance wire uniform winding exhausted
On edge bar, and its water level pipe upper end is provided with air-vent at diaphragm seal, it is difficult to ensures vacuum and surrounding soil vacuum in pipe
Degree is consistent, and does not consider that temperature influences equally, and measurement result accuracy remains to be discussed.
Therefore, it is necessary to which studying one kind both ensures sealing effectiveness, and can is prevented in the directly incoming water level pipe of under-membrance vacuum degree, together
When it can be considered that temperature influence measuring method.
Utility model content
To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of good airproof performance, measurement accurately
Underground water level measurement device under vacuum preloading.
In order to realize above-mentioned target, the utility model adopts the following technical scheme that：
Underground water level measurement device under a kind of vacuum preloading for considering temperature and influenceing, including both ends are respectively equipped with top lid and bottom
The water level pipe of lid；The medial surface of bottom is provided with the water-level and water-temperature sensor being connected with reception device, and the downside wall of water level pipe is provided with
Some filter openings.
Above-mentioned filter opening is wrapped up with geotextiles, to prevent soil particle from entering.
The medial surface of above-mentioned bottom is provided with bearing, and water-level and water-temperature sensor is screwed onto on bearing.
Above-mentioned water level pipe material is PVC.
Above-mentioned top cover, bottom, the material of bearing are stainless steel, close the both ends of water level pipe by bolted connection.
Above-mentioned top cover top opens up fluted, and the screw thread to match with drilling rod head is carved with groove.
Level sensor unit uses MEMS silicon piezoresistance type pressure sensors in above-mentioned water-level and water-temperature sensor, carries temperature
Compensation function.
The above-mentioned a length of 5-12 rice of water level pipe, its top depth of burying is 1-3 rice.
It is of the present utility model to be beneficial in that：
Underground water level measurement device under a kind of vacuum preloading of the present utility model, because water level pipe is embedded at 1 meter of underground,
With isolated from atmosphere, it ensure that vacuum in water level pipe, water level with unanimously, can effectively prevent vacuum pressure under film in surrounding soil
Power is directly delivered to inside water level pipe, while it also avoid the situation for causing water level pipe to poke diaphragm seal due to soil body sedimentation, is protected
The seal of vacuum preloading is demonstrate,proved so that measurement result is more accurate.
Water-level and water-temperature sensor is fixed on the bearing of water level pipe bottom, is expanded on the specific direction of sensor head silicon diaphragm
Dissipating has 4 equivalent semiconductor resistors, and connects into Wheatstone bridge, and when on ambient pressure effect silicon diaphragm, electric bridge loses
Balance, output voltage are changed, and pressure P size can be obtained by the proportional relation between output voltage and pressure, by demarcating simultaneously
After eliminating the part being affected by temperature, the signal of sensor transmissions is directly switched to head by reception device according to P=ρ gh principle
Height h, WATER LEVEL CHANGES can obtain by the change of head height.The principle and apparatus structure of this measuring method are simple, behaviour
Make convenient, implementation efficiently.
In addition, the water level range of the water-level and water-temperature sensor used is 120m, precision 5mm, precision is 0.004%FS precision,
Temperature range is -20 ~ 100 DEG C, 0.05 DEG C of precision, it can be ensured that measurement is precise and stable feasible.With very strong practicality and extensively
General applicability.
Brief description of the drawings
Fig. 1 is that the structure of underground water level measurement device under a kind of vacuum preloading for considering temperature change of the present utility model is shown
It is intended to.
Fig. 2 is the structural representation of header field of the present utility model.
Fig. 3 is the structural representation of bottom cover member of the present utility model.
The implication marked in accompanying drawing is as follows：1st, water level pipe, 2, top cover, 3, bottom, 4, bearing, 5, water-level and water-temperature sensor,
6th, electric wire, 7, aperture, 8, filter opening, 9, reception device, 10, diaphragm seal, 11, PE pipes, 12, bolt, 13, groove, 14, screw thread, 15,
Screw, 16, silicon diaphragm.
Embodiment
Make specific introduce to the utility model below in conjunction with the drawings and specific embodiments.
Underground water level measurement device under a kind of vacuum preloading for considering temperature change, including PVC water level pipes 1, water level pipe 1
Downside wall is provided with some filter openings 8 wrapped up with geotextiles, and both ends are provided with stainless steel top by way of bolt 12 connects respectively
Lid 2 and bottom 3.
The medial surface of bottom 3 is provided with stainless bridle iron 4, and the water-level and water-temperature sensor 5 being connected with reception device 9 is screwed onto branch
On seat 4.Level sensor unit uses MEMS silicon piezoresistance type pressure sensors in water-level and water-temperature sensor 5.
The top of top cover 2 opens up fluted 13, and the screw thread 14 to match with drilling rod head is carved with groove 13.
During practical operation：
In the prefabricated water level pipe 1 in ground, the length of water level pipe 1 is 9 meters, and the filter opening 8 on tube wall is uniform and a diameter of 10mm, and
The high round bearings 4 of 20cm are welded on bottom 3.
By the head of water-level and water-temperature sensor 5 out of, screw 15 at the center of 4 lower section precession bearing of bearing 4, dynamics during precession
Suitably, prevent from connecting pine or destroy sensor head, after ensuring that sensor has been fixed, bottom 3 is passed through into bolt
12 are connected with water level pipe 1, and bearing 4 and sensor are located in pipe.
The water-proof wire 6 of Sensor tail is passed from the aperture 7 of the upper end of water level pipe 1, certain unnecessary length is reserved when passing
Degree, prevents electric wire 6 from excessively bending.Wrapped up with PE pipes 11 to form protection, to prevent the part that electric wire 6 is stretched out beyond water level pipe 1
Electric wire 6 is frayed in the soil body and destroys.Space is strictly sealed with glass cement between electric wire 6 and aperture 7.Electric wire 6 is true with being located at
Reception device 9 outside empty precompressed zone connects, to receive data.
Geotextiles are wrapped in outside the bottom filter opening 8 of water level pipe 1, it is ensured that soil particle will not enter.
Water level pipe 1 is connected with top cover 2 by bolt 12, and it is with encapsulant that space between top cover 2 and water level pipe 1 is close
Envelope.
The hole that a depth is 10m is set with rig in embedded place, aperture is slightly larger than the diameter of 2 bottom of top cover 3, removed in drilling rod
After going out, prevent from connecting tension so that can not screw out by the upper grooves 13 of drilling rod head forward direction precession top cover 2, during precession.By drilling rod
Head slowly in positive precession hole, after water level pipe 1 reaches bottom hole, stops positive precession, drilling rod head is reversely delayed together with water level pipe 1
It is slow to screw out so that water level pipe 1 remains in bottom hole.Drilling rod head is taken out, water level pipe more than 1 and the surrounding space of PE pipes 11 are banketed and pressed
It is close.PE pipes 11 are layed under diaphragm seal 10, and passes through under sealing ditch and is connected with the reception device 9 outside sealing ditch.
After water level pipe 1 is embedded in the soil body, pore water is entered in pipe by filter opening 8, will be with underground after stable level in pipe
Height of water level is consistent.4 equivalent semi-conductor electricities are diffused with the specific direction of silicon diaphragm 16 on the head of water-level and water-temperature sensor 5
Resistance, and Wheatstone bridge is connected into, when on ambient pressure effect silicon diaphragm 16, electric bridge disequilibrium, output voltage becomes
Change, pressure P size can be obtained by the proportional relation between output voltage and pressure, by the part for demarcating and eliminating temperature influence
Afterwards, the signal of sensor transmissions is directly switched to head height h by reception device 9 according to P=ρ gh principle, by the change of head height
Change and can obtain WATER LEVEL CHANGES.
General principle, principal character and advantage of the present utility model has been shown and described above.The technical staff of the industry
It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation
The technical scheme obtained, all falls within the scope of protection of the utility model.
Claims (8)
1. underground water level measurement device under a kind of vacuum preloading for considering temperature change, it is characterised in that set respectively including both ends
There is the water level pipe of top cover and bottom；The medial surface of bottom is provided with the water-level and water-temperature sensor being connected with reception device, water level pipe
Downside wall is provided with some filter openings.
2. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, the filter opening is wrapped up with geotextiles.
3. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, the medial surface of the bottom is provided with bearing, and water-level and water-temperature sensor is screwed onto on bearing.
4. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, the water level pipe material is PVC.
5. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, the top cover, bottom, the material of bearing are stainless steel, close the both ends of water level pipe by bolted connection.
6. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, the top cover top opens up fluted, and the screw thread to match with drilling rod head is carved with groove.
7. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, level sensor unit uses MEMS silicon piezoresistance type pressure sensors in the water-level and water-temperature sensor.
8. underground water level measurement device under a kind of vacuum preloading for considering temperature change according to claim 1, its feature
It is, a length of 5-12 rice of water level pipe, its top depth of burying is 1-3 rice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729087.5U CN206891531U (en) | 2017-06-22 | 2017-06-22 | Underground water level measurement device under a kind of vacuum preloading for considering temperature change |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720729087.5U CN206891531U (en) | 2017-06-22 | 2017-06-22 | Underground water level measurement device under a kind of vacuum preloading for considering temperature change |
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| CN206891531U true CN206891531U (en) | 2018-01-16 |
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| CN201720729087.5U Active CN206891531U (en) | 2017-06-22 | 2017-06-22 | Underground water level measurement device under a kind of vacuum preloading for considering temperature change |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362849A (en) * | 2020-11-11 | 2021-02-12 | 华北水利水电大学 | Device and method for measuring water inrush and sand inrush separate phase content in water inrush and sand inrush experiment |
-
2017
- 2017-06-22 CN CN201720729087.5U patent/CN206891531U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112362849A (en) * | 2020-11-11 | 2021-02-12 | 华北水利水电大学 | Device and method for measuring water inrush and sand inrush separate phase content in water inrush and sand inrush experiment |
| CN112362849B (en) * | 2020-11-11 | 2023-10-31 | 华北水利水电大学 | Device and method for measuring phase separation content of water burst and sand burst in water burst sand burst experiment |
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