CN109827702A - Pore pressure gauge and pore water pressure force test device - Google Patents
Pore pressure gauge and pore water pressure force test device Download PDFInfo
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- CN109827702A CN109827702A CN201811190661.XA CN201811190661A CN109827702A CN 109827702 A CN109827702 A CN 109827702A CN 201811190661 A CN201811190661 A CN 201811190661A CN 109827702 A CN109827702 A CN 109827702A
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- Prior art keywords
- filter
- pore
- shell
- protective shell
- pressure gauge
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- 239000011148 porous material Substances 0.000 title claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 24
- 239000000565 sealant Substances 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000004576 sand Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of pore pressure gauge and pore water pressure force test device comprising protective shell and the main body being placed in protective shell, first filter；Main body, including piezoelectric pressure sensing unit, constant current drive unit, AD conversion unit and outlet joint, the outlet joint are located at the outside of the protective shell；First filter, is placed in the protective shell and has and expose to the exposed portion except protective shell, and sealing ring is equipped between first filter and the main body.The present invention is convenient for data acquisition.
Description
Technical field
The present invention relates to a kind of technical fields for observing Rock And Soil pore water pressure, more particularly to a kind of pore water pressure
Power meter and pore water pressure force test device.
Background technique
In geotechnical engineering, pore water of the observation foundation soil body or side slope etc. under external load or natural load action
Pressure change project is long-standing.Especially artificial construction project scale is increasing in recent decades, and load is higher and higher,
Foundation stability is judged, in the indexs such as soil solidifying degree, the rising of native Pore Pressure and observation of dissipating be can't steer clear of
Project.
However the pore pressure gauge of market prevalence is not appropriate for carrying out burying a hole more as independent pore pressure meter at present, that is, exists
Multiple pore pressure gauges are buried in one drilling.The pore pressure meter of current market prevalence is mostly with vibratory string energisation mode on the other hand
Principle production, for having many advantages, such as that insulation relative requirement is low when manual testing, feedback signal is clear, but is not particularly well suited for
Carry out automatic data collection.
It is buried suitable for a hole and therefore, it is necessary to a kind of convenient for the pore water pressure machine of data acquisition more.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of pore pressure gauge and holes
Hydraulic pressure force test device, for solve a hole more nuzzle row different soil water pressure detection integrity problem.
In order to achieve the above objects and other related objects, the present invention provides a kind of pore pressure gauge comprising protective shell
And it is placed in main body, first filter in protective shell,
Main body, including piezoelectric pressure sensing unit, constant current drive unit, AD conversion unit and outlet joint, institute
State the outside that outlet joint is located at the protective shell；
First filter, is placed in the protective shell and has and expose to the exposed portion except protective shell, first filter
Sealing ring is equipped between the main body.
Preferably, the protective shell is tubulose, and the outlet joint and the first filter respectively correspond protective shell
Both ends.
Preferably, the piezoelectric pressure sensing unit is diffused-silicon pressure core.
Preferably, the first filter is stainless steel sintering or two kinds of materials of ceramic post sintering.
The present invention also provides a kind of pore water pressure force test devices comprising at least one section detection section, each detection Duan Jun
Include:
Shell is divided into seal chamber and filter chamber in shell, and constituting has water hole on the shell of the filter chamber, shell
End has quick union；
Pore pressure gauge is pore pressure gauge as described above, is placed in the seal chamber；The outlet joint connects
Connect two taps, two taps are by opposite both ends that shell is arranged in and exposed；And the exsertion part is in the filtering
It is intracavitary；
Second filter is placed in the filter chamber.
Preferably, second filter is made of medium coarse sand.
Preferably, it is connected between all detection sections using 485 serial bus modes.
Preferably, the seal chamber is enclosed by filling the sealant inside the shell and around above-mentioned pore pressure gauge
At.
As described above, pore pressure gauge and pore water pressure force test device of the invention, have the advantages that hole
Gap water pressure gauge is based on piezo electrics, using chips such as diffusion silicon as pressure sensitive cells, and is equipped with AD conversion unit,
It can very convenient access data collection system；In addition, pore water pressure force test device, can be adapted for a hole and buries more, i.e.,
Multiple detection sections are concatenated, are buried in same detection hole, each pore pressure gauge can be protected using shell, in partition
Drainage channel between lower adjacent pores water pressure gauge can effectively solve pressure when one hole of pore pressure gauge is buried more and gang up
Phenomenon, and expand filter area by two filters, more accurately test native Pore Pressure value.
Detailed description of the invention
Fig. 1 is shown as pore pressure gauge schematic diagram of the invention.
Fig. 2 is shown as pore water pressure force test device schematic diagram of the invention.
Component label instructions
100 shells
102 sealants
103 pore pressure gauges
104 second filters
105 water holes
106 rubber stoppers
101,107 tap
108 quick unions
201 outlet joints
202 pipe fittings one
202 pipe fittings two
204 sealing rings
205 first filters
206 circuit boards
207 piezoelectric pressure sensing units
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Fig. 1 is please referred to Fig. 2.It should be clear that structure, ratio, size etc. depicted in this specification institute attached drawing, only to
Cooperate the revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the invention can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of present invention can be generated and the purpose that can reach, it should all still fall in disclosed skill
In the range of art content can cover.Meanwhile in this specification it is cited as "upper", "lower", "left", "right", " centre " and
The term of " one " etc. is merely convenient to being illustrated for narration, rather than to limit the scope of the invention, relativeness
It is altered or modified, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
As shown in Figure 1, the present invention provides a kind of pore pressure gauge comprising protective shell and the master being placed in protective shell
Body, first filter 205,
Main body, including piezoelectric pressure sensing unit 207, constant current drive unit, AD conversion unit are (permanent in the present embodiment
Stream exciting unit and AD conversion unit be located on circuit board 206) and outlet joint 201, the outlet joint 201 be located at institute
State the outside of protective shell；
First filter 205 is placed in the protective shell and has the exposed portion except protective shell that exposes to, the first filtering
Sealing ring 204 is equipped between device and the main body.
The present embodiment uses main body of the piezoelectric pressure sensing unit 207 as pore water pressure, which ensure that pore water
The stability of pressure acquisition can directly believe the simulation of acquisition in addition, being integrated with AD conversion unit on circuit board 206
Number it is converted into digital signal, convenient for remote transmission, avoids distorted signals during analog signal transmission.
Protective shell is tubulose in the present embodiment comprising is socketed in integrated pipe fitting 1 and pipe fitting 2 203, the two point
The chamber of above-mentioned piezoelectric pressure sensing unit 207 and circuit board 206, the outlet joint 201 and described Xing Cheng not stored
One filter 205 respectively corresponds the both ends of protective shell, is easily installed use.In addition, in order to preferably protect above-mentioned piezoelectric type pressure
Power sensing unit 207 avoids other external pressures from influencing the detection of water pressure, and protective shell is by stainless steel material system in the present embodiment
At may be other metal materials or other hard materials, external pressure can be resisted, it is ensured that piezoelectric pressure is sensitive single
Member 207 is in chamber not by other pressure influences outside chamber.
Piezoelectric pressure sensing unit 207 is diffused-silicon pressure core in the present embodiment, and above-mentioned constant current drive unit uses
Constant current exciting mode provides excitation to piezoelectric pressure sensing unit 207, and the current analog signal of feedback passes through analog-to-digital conversion list
Member is converted into digital signal output.
First filter 205 is that stainless steel is sintered filtrate or ceramic post sintering filtrate in the present embodiment.
.To ensure that above-mentioned piezoelectric pressure sensing unit 207 is in closed chamber, water is avoided directly to release with it,
Sealing ring 204 is equipped in the present embodiment between first filter 205 and the main body, which can be nitrile rubber circle.
Water detected is just known at detectable main body after first filter 205, examines through above-mentioned piezoelectric pressure sensing unit 207
It surveys.
As shown in Fig. 2, the present invention also provides a kind of pore water pressure force test devices comprising at least one section detection section, often
One detection Duan Jun includes: shell 100, is divided into seal chamber and filter chamber in shell 100, constituting has on the shell of the filter chamber
The end of water hole 105, shell 100 has quick union 108；
Pore pressure gauge 103 is pore pressure gauge as described above, is placed in the seal chamber；The outlet connects
Two taps 101,107 of first 201 connection, two taps 101,107 are by opposite both ends that shell 100 is arranged in and exposed；
And the exsertion part is in the filter chamber；
Second filter 104, is placed in the filter chamber, and the second filter 104, which has, in the present embodiment accommodates exposed portion
Accommodating cavity.
Filter, 104 shape of above-mentioned first filter 205 and the second filter are equipped in the present embodiment in every section of detection section
At double-filtration, pore water pressure is observed closer to virtual condition；Pore pressure gauge is placed in seal chamber, detection section and detection
After section concatenation, it can avoid a hole and bury water pressure string hole problem between pore water pressure peephole more.
For better implementation, above-mentioned shell is protection tube, and above-mentioned quick union 108 can be the spiral shell on protection tube
Line connecting pin can also be independent connector, and when need to only bury the hole, multiple detection sections are serially connected more.
Above-mentioned seal chamber is enclosed by being filled in the sealant 102 in shell 100 and around above-mentioned pore pressure gauge 103
At sealant seals pore pressure gauge 103, avoids string hole, only detects by the water in filter chamber through the second filter
104, it is detected after first filter 205 by above-mentioned piezoelectric pressure sensing unit.Above-mentioned first filter 205 in the present embodiment
Exposed portion is directly protruding into the second filter 104, and pore pressure gauge 103 is with sealant 102 around sealing, the second filtering of partition
Other penetrating passages of device 104 in shell 100, so that the waterpower connection in same hole between different aperture water pressure gauge be isolated
System.
Medium coarse sand can be filled in the present embodiment in second filter 104 to constitute, the exposed portion of above-mentioned first filter 205 is straight
It patches in medium coarse sand, it is not necessary that accommodating cavity is specially arranged.The filtering segment length 130mm of second filter 104 filters bore dia
1.5mm-2mm, peripherally disposed 8 column filter hole (filter hole can be the water hole 105 on above-mentioned shell), distance between borehole
8mm.Rubber stopper 106, rubber stopper 106, shell 100 and the sealant for forming above-mentioned seal chamber is arranged in the end of above-mentioned shell
102 surround above-mentioned filter chamber jointly, also constitute the shell of the second filter 104.
When to bury convenient for a hole, the detection section of all concatenations transmits data, in the present embodiment between all detection sections more
It is connected using 485 serial bus modes, in the settable terminal resistance in the end of 485 serial bus.
The present embodiment realizes the concrete mode that a hole is buried more using above-mentioned pore water pressure force test device are as follows: detects section for one
On underlying tap 107 pass through quick union 108 after reached out of shell it is next detection section be located above point
It at connector 101, is enclosed in above-mentioned sealant 102 after two connectors are connected and connected with marine glue, detects connecing fastly for section for two sections
Connector 108 is connected, and completes the mechanical connection and communication connection of two sections of detection sections, can also be arranged protection pipe in the junction of section and section
Section.It is completed until one section of detection section of bottom connects.It is no longer needed on the tap 107 of the detection section of bottom under connection
Cable connector, but terminal resistance is connected to cable end piece and is sealed in sealant 102.
In conclusion pore pressure gauge and pore water pressure force test device of the invention, have following characteristics:
(1) piezoelectric pressure sensing unit 207 is used, diffusion silicon core can be used, it is ensured that manufactured pore pressure gauge
Performance is stablized.
(2) digital signal output is converted analog signals into using AD conversion unit, solves analog signal transmission process
Middle distorted signals；And facilitates and carry out automated system access.
(3) two-stage filter is set in each detection section, and pore water pressure is observed closer to virtual condition.Pore water pressure
Using the stringent partition of sealing between power meter, prevents a hole and bury pore water pressure peephole string hole problem more.
(4) modularized design, every detection segment structure is identical, convenient for the connection of mechanical concatenation and communication, is convenient for not
It is assembled with inbuilt pore pressure meter.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization
Value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. a kind of pore pressure gauge, which is characterized in that including protective shell and the main body being placed in protective shell, the first filtering
Device, main body, including piezoelectric pressure sensing unit, constant current drive unit, AD conversion unit and outlet joint, the outlet
Connector is located at the outside of the protective shell；
First filter, is placed in the protective shell and has and expose to the exposed portion except protective shell, first filter and institute
It states and is equipped with sealing ring between main body.
2. pore pressure gauge according to claim 1, it is characterised in that: the protective shell is tubulose, and the outlet connects
Head and the first filter respectively correspond the both ends of protective shell.
3. pore pressure gauge according to claim 1, it is characterised in that: the piezoelectric pressure sensing unit is diffusion
Silicon pressure core.
4. pore pressure gauge according to claim 1, it is characterised in that: the first filter be stainless steel be sintered or
Two kinds of materials of person's ceramic post sintering.
5. a kind of pore water pressure force test device, it is characterised in that: including at least one section detection section, each detection Duan Jun includes:
Shell is divided into seal chamber and filter chamber in shell, and constituting has water hole, the end of shell on the shell of the filter chamber
With quick union；
Such as the described in any item pore pressure gauges of Claims 1-4, it is placed in the seal chamber；The outlet joint connection
Two taps, two taps are by opposite both ends that shell is arranged in and exposed；And the exsertion part is in the filter chamber
It is interior；
Second filter is placed in the filter chamber.
6. pore water pressure force test device according to claim 5, it is characterised in that: second filter is by medium coarse sand
It constitutes.
7. pore water pressure force test device according to claim 5, it is characterised in that: used between all detection sections
485 serial bus modes connect.
8. pore water pressure force test device according to claim 5, it is characterised in that: the seal chamber is by being filled in shell
Interior and around above-mentioned pore pressure gauge sealant surrounds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190661.XA CN109827702A (en) | 2018-10-12 | 2018-10-12 | Pore pressure gauge and pore water pressure force test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811190661.XA CN109827702A (en) | 2018-10-12 | 2018-10-12 | Pore pressure gauge and pore water pressure force test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109827702A true CN109827702A (en) | 2019-05-31 |
Family
ID=66858790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811190661.XA Pending CN109827702A (en) | 2018-10-12 | 2018-10-12 | Pore pressure gauge and pore water pressure force test device |
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| Country | Link |
|---|---|
| CN (1) | CN109827702A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1425904A (en) * | 2002-12-06 | 2003-06-25 | 陆致中 | High precision steel wire type porous water pressure sensor |
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| CN102900063A (en) * | 2012-10-30 | 2013-01-30 | 东南大学 | Dynamic pore-pressure static sounding probe for detecting sludge |
| CN103195045A (en) * | 2013-03-25 | 2013-07-10 | 长沙理工大学 | Device for embedding multiple pore water pressure gauges through one hole |
| CN203498817U (en) * | 2013-09-30 | 2014-03-26 | 中交上海航道勘察设计研究院有限公司 | Continuous pore water pressure measuring device |
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-
2018
- 2018-10-12 CN CN201811190661.XA patent/CN109827702A/en active Pending
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|---|---|---|---|---|
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