CN207095646U - Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition - Google Patents
Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition Download PDFInfo
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- CN207095646U CN207095646U CN201721078778.XU CN201721078778U CN207095646U CN 207095646 U CN207095646 U CN 207095646U CN 201721078778 U CN201721078778 U CN 201721078778U CN 207095646 U CN207095646 U CN 207095646U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000007667 floating Methods 0.000 claims abstract description 57
- 239000003673 groundwater Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 11
- 239000004746 geotextile Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 2
- 238000010079 rubber tapping Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002689 soil Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000002153 concerted effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition, including water level pipe and measuring apparatus, it is characterised in that：Voltage sensitive sensor in the measuring apparatus is fixed on the top closure of the water level pipe；Floating body in measuring apparatus is arranged in the water level pipe；The floating body lower end by it is spacing it is fixed in the sealed bottom lid contact of bar and water level pipe it is spacing and fixed in；The upper end of the floating body is fixedly connected with the sensing chip of the voltage sensitive sensor；The outlet line of the measuring apparatus connects readout instrument.The floating body is converted to the change of water level in the water level pipe change of voltage sensitive sensor electric signal, obtains water level numerical value.The utility model is simple and reliable for structure, convenient test, and does not change the vacuum negative pressure condition that in water level pipe and pipe is all in measurement process, can measure the level of ground water under condition of negative pressure.
Description
Technical field
It the utility model is related to Geotechnical Engineering Soft Ground, vacuum drainage pre-compression is reinforced, underground water level measurement monitoring
Deng field, level of ground water field measurement apparatus under more particularly to a kind of new negative pressure of vacuum air-proof condition.
Background technology
In the engineering practices such as Geotechnical Engineering Soft Ground, vacuum drainage pre-compression reinforcing, level of ground water is one ten
Divide important monitoring index.Vacuum preloading method is a kind of effective soft foundation processing technology, is widely used at present, and
Combined with new technology, new method, be continuously available improvement.Truly, the change rule of level of ground water under negative pressure of vacuum environment are accurately obtained
Rule is advantageous to the consolidation theory of improved vacuum precompressed and instructs engineering practice.Traditional vacuum preloading underground water level measurement is typically adopted
With water level pipe, the mode using the artificial reading of water-level gauge is set in advance, need to open closure when measuring water level causes in water level pipe
Sealing space and atmosphere, easily cause SEA LEVEL VARIATION, it is not the true underground water under the conditions of negative-pressure sealing to survey numerical value
Position.Therefore, it is necessary to study a kind of measurement apparatus that water level pipe and atmosphere are avoided in measurement process, accurately measure vacuum and bear
Water level under the conditions of means of press seals, accurate data are provided and supported for research vacuum preloading mechanism and evaluation consolidation effect.
The content of the invention
To solve underground water level measurement technical problem under negative pressure of vacuum air-proof condition, the purpose of this utility model is to provide one
The new underground water level measurement device of kind, ensures directly and accurately to read level of ground water under negative pressure of vacuum air-proof condition.This reality
It is simple, accurate reliable and repeatable utilize with New-type instant.
To achieve the above object, technical scheme is used by the utility model：One kind is applied to negative pressure of vacuum sealing strip
Underground water level measurement device under part, including water level pipe and measuring apparatus, it is characterised in that：Pressure-sensitive biography in the measuring apparatus
Sensor is fixed on the top closure of the water level pipe；Floating body in measuring apparatus is arranged in the water level pipe；Should
Floating body lower end by it is spacing it is fixed in the sealed bottom lid contact of bar and water level pipe it is spacing and fixed in（Floating body is set to be protected in water level pipe
Hold upright）；The upper end of the floating body is fixedly connected with the sensing chip of the voltage sensitive sensor；The outlet line of the measuring apparatus
Connect readout instrument.
The floating body is the constant cylinder in cross section；The length of floating body is slightly less than water level length of tube, is 6m ~ 10m；Institute
State floating body diameter and be slightly less than water level pipe diameter, be 6cm ~ 9cm.The change of water level in the water level pipe is converted to pressure by the floating body
The change of dependent sensor electric signal, obtain water level numerical value.
In other words, measuring apparatus described in the utility model, including water level pipe and measuring apparatus, measuring apparatus include floating body and
Voltage sensitive sensor；The voltage sensitive sensor is fixed on the top closure of the water level pipe；The floating body upper end and institute
The sensing chip for stating voltage sensitive sensor is fixedly connected；The floating body lower end is spacing by spacing fixed middle bar and sealed bottom lid contact
And in determining.When measured zone level of ground water changes, the displacement of volume of floating body also changes in water level pipe, suffered by floating body
Buoyancy changes therewith, and buoyancy suffered by floating body is worth linear with WATER LEVEL CHANGES.Due to floating body upper end and voltage sensitive sensor
It is fixedly connected, therefore buoyancy suffered by floating body can be conversed by voltage sensitive sensor reading, obtains level of ground water and water level tube top
The distance in portion, then level of ground water elevation is measured by measurement pipe crest level indirectly.
In prioritization scheme, the water level pipe top is sealing pipeline section that can not be permeable, and bottom is parcel non-woven geotextile filter
The chimney filter section of film, pipeline section line of demarcation are slightly above initial level of ground water, as far as possible in the Soft Soil Layer below sand bedding course, water level tube top
Portion and bottom are respectively provided with closure.Water level length of tube is 6m ~ 10m depending on place；Internal diameter is 7cm ~ 10cm.
The voltage sensitive sensor is fixedly mounted on closure at the top of water level pipe, and closure rigidity should be able to sustain floating body transmission
Maximum buoyancy, sensor accuracy will meet the required precision for being converted into float, and the measurement circuitry of sensor passes through tapping
Drilling outlet afterwards, make to seal at the closure wire hole of top using tapping bolt crush seal circle.
The floating body is the constant cylinder in cross section, and material be lightweight impermeable material, can be it is hollow, unit volume
Buoyancy is constant, and modulus is larger, and the compression of part submerged in water can be ignored.The length of floating body is slightly less than water
Position length of tube, is 6m ~ 10m；The floating body diameter is slightly less than water level pipe diameter, is 6cm ~ 9cm.The floating body upper end and the pressure
The sensing chip of dependent sensor is fixedly connected, make during its work not fall off with the sensing chip of voltage sensitive sensor and all the time with it is pressure-sensitive
Sensor chip keeps contact condition.The floating body lower end is spacing with sealed bottom lid contact and fixed by spacing fixed middle bar
In, spacing fixed middle bar is fixed on sealed bottom and covered.
The spacing fixed middle bar is cylinder quarter butt, makes floating body in water level pipe by the insertion floating body lower end stopper slot
It is kept upright, floating body can be avoided to tilt friction is contacted with water level inside pipe wall and influences buoyancy measurement.The spacing fixed middle bar chi
It is very little unsuitable excessive under conditions of it can meet job requirement, avoid floating body cross section excessive in stopper slot regional change.
The utility model proposes novel evacuated negative-pressure sealing under the conditions of underground water level measurement device have following technology excellent
Gesture and feature：Level of ground water is obtained indirectly using the principle of floating body stress, need not be uncapped and convenient, fast can be surveyed in measurement process
Water level in vacuum preloading water level pipe is measured, is not changed in water level pipe and the vacuum negative pressure condition in pipe week, water level and surrounding in water level pipe
Level of ground water in foundation soil is consistent, and meets the technical requirements of vacuum preloading underground water level measurement；Measurement accuracy is high, and energy
Enough continuous measurement levels of ground water are without influenceing its test result；Measurement apparatus can be recycled for multiple times, economic, environmental protection, adaptability
By force, suitable for field popularization application.
Brief description of the drawings
Fig. 1-1, Fig. 1-2 are the utility model measuring principle schematic diagrames.
Fig. 2 is the utility model measurement apparatus sectional structure chart.
In figure：1st, floating body, 2, voltage sensitive sensor, 3, tapping bolt, 4, measurement circuitry, 5, readout instrument, 6, top sealing
Lid, 7, water level pipe, 8, non-woven geotextile, 9, sand bedding course, 10, Soft Soil Layer, 11, phreatic line, 12, it is spacing it is fixed in bar, 13, bottom
Portion's closure.
Embodiment
As shown in Fig. 2 underground water level measurement device of the present utility model mainly includes water level pipe and measuring apparatus, water level pipe
7, which include the fluid-tight sealing pipeline section in top and bottom chimney filter section, measuring apparatus, includes floating body 1, voltage sensitive sensor 2, measurement circuitry 4
With readout instrument 5.Embodiment is as follows：
At vacuum preloading scene, drilled in design attitude bury water level pipe 7 first, water level pipe 7 is by upper
The sealing pipeline section of the impermeable watertight in portion and the bottom chimney filter section composition for wrapping up non-woven geotextile filter membrane, pipeline section line of demarcation is slightly above just
Beginning level of ground water, and be located at as far as possible in Soft Soil Layer 10 of the sand bedding course below 9, installation sealed bottom lid 13, and in sealed bottom lid
The spacing fixed middle bar 12 of center installation；During drilling pipe laying, it should ensure that perpendicularity deviation within ± 2 °；The depth of water level pipe 7 will
Asking should be so that manage interior floating body 1 be constantly in the state that buoyancy is more than gravity during whole work；The top closure 6 of water level pipe 7
Not installing first makes it open；Water level pipe, which passes diaphragm seal, should do encapsulation process, and the mouth of pipe is higher by earth's surface certain altitude, facilitates the later stage to survey
Measure reading；Vertical, the initial water level in record water level pipe is checked whether after the embedded water level pipe 7 in scene.
After water level pipe installation, the drilling and tapping on top closure 6, the voltage sensitive sensor 2 in measuring system is pacified
Dress is fixed on the closure 6 of top, and the measurement circuitry 4 of voltage sensitive sensor 2 utilizes tapping bolt by the drilling outlet after tapping
Crush seal circle makes to seal at the wire hole of closure 6 of top.Measure the quality of floating body 1And cross-sectional area, by the top of floating body 1
With the sensing chip of voltage sensitive sensor 2 is cementing is fixedly connected, measure the bottom of floating body 1 to the distance of top closure.Will be above-mentioned solid
Floating body 1 in fixed connection entirety is put into water level pipe 7 together with top closure 6 and voltage sensitive sensor 2, will when approaching in place
The bottom of floating body 1 reserve it is spacing determine mesopore be put into it is spacing it is fixed in bar 12, finally by top closure 6 and 7 cementing sealing of water level pipe.By
Draining is wanted when floating body 1 is pressed into water level pipe 7 in installation process, therefore water level is not yet stable in water level pipe 7, so being in measurement
I.e. it is believed that water level reaches initial level of ground water in water level pipe 7 after the reading of readout instrument 5 tends towards stability after system installation.Now
By the displacement of volume for the floating body 1 that converts, then converse drain height and can obtain the distance that phreatic line 11 arrives the mouth of pipe, if
It is consistent with manually measuring initial water level before installation, illustrate that measurement apparatus work is good, otherwise should be debugged.Scene vacuumizes
When, the sealing situation of level measurement device should be gone through, pays attention to related waterproof and protection work.
Level measuring principle：As shown in figure 1, floating body is in initial stressed state：
In formula：To make a concerted effort suffered by floating body；For the density of water；For floating body cross-sectional area；For floating body bottom and water level
The distance of line；For floating body quality；For acceleration of gravity.
When measuring closure top elevation at the top of water level pipe, waterline elevation is：
In formula：For water level pipe top cover elevation；For floating body bottom and the distance of top cover.
It can then be obtained by formula, the elevation and the suffered size of making a concerted effort of floating body of waterline are linear, can pass through pressure-sensitive biography
Sensor surveys floating body size of making a concerted effort and converses the elevation of waterline.
The utility model device need not uncap during underground water level measurement, solve the closed negative pressure ring of vacuum preloading
Level measuring problem in border, level of ground water can be continuously measured without influenceing measurement result, measurement is convenient, definite principle, device
It can recycle, it is economic and environment-friendly.
Claims (4)
1. a kind of underground water level measurement device being applied under negative pressure of vacuum air-proof condition, including water level pipe and measuring apparatus, its
It is characterised by：Voltage sensitive sensor in the measuring apparatus is fixed on the top closure of the water level pipe；Measurement is set
Floating body in standby is arranged in the water level pipe；The floating body lower end is contacted by spacing fixed middle bar with the sealed bottom lid of water level pipe
During formula is spacing and fixed；The upper end of the floating body is fixedly connected with the sensing chip of the voltage sensitive sensor；The measuring apparatus it is defeated
Go out circuit and connect readout instrument.
2. the underground water level measurement device according to claim 1 being applied under negative pressure of vacuum air-proof condition, its feature exist
In：The water level length of tube is 6m ~ 10m；Internal diameter is 7cm ~ 10cm；The floating body is the constant cylinder in cross section；It is described floating
Body length is slightly less than water level length of tube, is 6m ~ 10m；The floating body diameter is slightly less than water level pipe diameter, is 6cm ~ 9cm.
3. the underground water level measurement device according to claim 1 being applied under negative pressure of vacuum air-proof condition, its feature exist
In：The water level pipe top is sealing pipeline section that can not be permeable, and to wrap up the chimney filter section of non-woven geotextile filter membrane, pipeline section divides for bottom
Boundary line is slightly above initial level of ground water.
4. the underground water level measurement device being applied under negative pressure of vacuum air-proof condition according to one of claim 1-3, its
It is characterised by：The spacing fixed middle bar is cylinder quarter butt, floating body is protected in water level pipe by embedded floating body lower end stopper slot
Hold upright.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721078778.XU CN207095646U (en) | 2017-08-25 | 2017-08-25 | Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721078778.XU CN207095646U (en) | 2017-08-25 | 2017-08-25 | Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207095646U true CN207095646U (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721078778.XU Active CN207095646U (en) | 2017-08-25 | 2017-08-25 | Suitable for the underground water level measurement device under negative pressure of vacuum air-proof condition |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238401A (en) * | 2018-09-14 | 2019-01-18 | 杭州热博科技有限公司 | Liquid level detection device and method |
-
2017
- 2017-08-25 CN CN201721078778.XU patent/CN207095646U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238401A (en) * | 2018-09-14 | 2019-01-18 | 杭州热博科技有限公司 | Liquid level detection device and method |
| CN109238401B (en) * | 2018-09-14 | 2021-05-07 | 杭州热博科技有限公司 | Liquid level detection device and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231214 Address after: 210029 No. 223, Guangzhou Road, Gulou District, Jiangsu, Nanjing Patentee after: NANJING HYDRAULIC Research Institute Patentee after: CHINA COMMUNICATION CONSTRUCTION COMPANY FIRST HARBOUR CONSULTANTS Co.,Ltd. Address before: 210029 No. 223, Guangzhou Road, Nanjing, Jiangsu Patentee before: NANJING HYDRAULIC Research Institute |
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| TR01 | Transfer of patent right |