CN207675554U - A kind of soil pressure in-situ testing device - Google Patents
A kind of soil pressure in-situ testing device Download PDFInfo
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- CN207675554U CN207675554U CN201721815868.2U CN201721815868U CN207675554U CN 207675554 U CN207675554 U CN 207675554U CN 201721815868 U CN201721815868 U CN 201721815868U CN 207675554 U CN207675554 U CN 207675554U
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- soil pressure
- testing device
- backplate
- situ testing
- hydraulic
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- 239000002689 soil Substances 0.000 title claims abstract description 90
- 238000012360 testing method Methods 0.000 title claims abstract description 50
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 238000001727 in vivo Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000005538 encapsulation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a kind of soil pressure in-situ testing devices, the soil pressure in-situ testing device includes backplate, the front of the backplate is provided with a groove, encapsulation is provided with an Elastic Contact panel in the open face of the groove, and the Elastic Contact panel is enclosed closed hydraulic chamber with the groove；The hydraulic chamber is connected to hydraulic ga(u)ge, and liquid is filled in the hydraulic chamber.The utility model has the advantages that：Measure soil pressure by the way of hydraulic conduction, the influence of periphery soil layer is smaller in installation process, efficiently solves the problems, such as measurement result distortion existing in the prior art.
Description
Technical field
The utility model belongs to field of civil engineering, and in particular to a kind of soil pressure in-situ testing device.
Background technology
Pressure state test is evaluation geotechnical engineering structure safety, the whether rational important side of verification design theory in the soil body
One of method, currently used earth pressure test method are mainly traditional pressure by burying what soil pressure cell carried out in the soil body
Power box is using type vibration wire soil pressure cell, by putting soil pressure cell to required depth, then after prebored hole pore-forming when test
By in hole backfill so that the soil body is filled soil pressure cell peripheral space, the soil pressure of periphery undisturbed soil is transferred to by backfill
Soil pressure cell contact surface, the vibratory string frequency by acquiring type vibration wire soil pressure cell changes, to obtain the situation of change of soil pressure.
But since the periphery of soil pressure cell circular contact face is by rigid material encirclement, support, cause soil pressure preferable
Be transferred to contact surface, and since method for embedding is using the method for prebored hole then backfill, inevitably cause soil pressure
Power and periphery backfill not closely knit enough or excessively closely knit situation, cause soil pressure cell periphery Soil mass state to change, draw
Play the distortion of earth pressure test result.
Invention content
The purpose of this utility model is to provide a kind of soil pressure in-situ test dress according to above-mentioned the deficiencies in the prior art place
It sets, which measures soil pressure by the way of hydraulic conduction, and the influence of periphery soil layer is smaller in installation process, efficiently solves
The problem of measurement result distortion existing in the prior art.
The utility model aim realization is completed by following technical scheme：
A kind of soil pressure in-situ testing device, the soil pressure in-situ testing device includes backplate, the backplate
Front is provided with a groove, is encapsulated in the open face of the groove and is provided with an Elastic Contact panel, the Elastic Contact panel
It is enclosed closed hydraulic chamber with the groove；The hydraulic chamber is connected to hydraulic ga(u)ge, filling in the hydraulic chamber
There is liquid.
The backplate is connect with rigid rod, and the two is directly connected to or is connected by connecting pin；
The bottom of the backplate is triangle, wedge shape or arc.
The hydraulic ga(u)ge is connected with signal wire；The signal wire extends upwardly to ground.
Front of the Elastic Contact panel with the backplate by way of CONTACT WITH FRICTION is attached.
The utility model has the advantages that：
（1）It is pressed into soil after soil pressure in-situ testing device is pressed directly into soil layer or part drills, due to backplate bottom
Portion is provided with the construction convenient for burying, therefore smaller to the disturbance of the soil body, and due to being in indentation soil, Elastic Contact panel can be direct
It is contacted with original-pack soil where test position, ideal test effect can be obtained.
（2）Hydrostatic sensor is connected with hydraulic cavities；Hydrostatic sensor directly converts fluid pressure to telecommunications in underground
Number it is transmitted to ground；Since underground environment is essentially constant temperature, therefore fluid pressure is not influenced by ambient temperature；
（3）Hydraulic chamber is that rigid material fixes support, only horizontal direction elasticity other than Elastic Contact panel
Touch panel can be moved forward and backward with soil pressure, therefore the mechanical concept of testing level to soil pressure is clear, the liquid pressure value measured
There are specific theory relations for conversion with horizontal direction soil pressure force value.
Description of the drawings
Fig. 1 is the front view that the utility model implements soil pressure in-situ testing device in 1；
Fig. 2 is the side view that the utility model implements soil pressure in-situ testing device in 1；
Fig. 3 is that soil pressure in-situ testing device is pressed into the schematic diagram during soil layer in the utility model；
Fig. 4 is that soil pressure in-situ testing device is pressed into the schematic diagram during soil layer in the utility model；
Fig. 5 is the front view that the utility model implements soil pressure in-situ testing device in 2；
Fig. 6 is the side view that the utility model implements soil pressure in-situ testing device in 2；
Fig. 7 is the front view that the utility model implements soil pressure in-situ testing device in 3；
Fig. 8 is the side view that the utility model implements soil pressure in-situ testing device in 3.
Specific implementation mode
The feature of the utility model and other correlated characteristics are made further specifically by embodiment below in conjunction with attached drawing
It is bright, in order to the understanding of technical staff of the same trade：
Such as Fig. 1-8, label 1-8 is respectively in figure：Elastic Contact panel 1, backplate 2, hydraulic chamber 3, pressure transmission pipe
4, hydraulic ga(u)ge 5, connecting pin 6, signal wire 7, rigid rod 8
Embodiment 1：As shown in Figure 1, 2, the present embodiment is specifically related to a kind of soil pressure in-situ testing device, and the soil pressure is former
Bit test device includes backplate 2；Backplate 2 is slab made of metal, and overleaf the front setting of plate 2 is fluted；The back of the body
The front of panel 2 is additionally provided with Elastic Contact panel 1, and Elastic Contact panel 1 is enclosed the hydraulic chamber 3 of sealing with groove；
Backplate 2 is internally provided with hydraulic ga(u)ge 5, and hydraulic ga(u)ge 5 is connected to by pressure transmission pipe 4 with hydraulic chamber 3；Hydraulic chamber 3 and
4 inside of pressure transmission pipe is filled with liquid；Hydraulic ga(u)ge 5 is used to measure the fluid pressure inside hydraulic chamber 3.
As shown in Figure 1, 2, Elastic Contact panel 1 is the metallic plate of thinner thickness；Elastic Contact panel 1 can be in the work of soil pressure
Small deformation is generated with lower, leads to the pressure rise inside hydraulic chamber 3；The pressure of hydraulic chamber 3 is detected by hydraulic ga(u)ge 5
It can detect the soil pressure acted on Elastic Contact panel 1；In the present embodiment, Elastic Contact panel 1 can be by rubbing
The mode for wiping contact is connect with backplate 2, and the thickness of backplate 2 is far longer than Elastic Contact panel 1；Under the action of soil pressure
The deformation of generation is far smaller than the deformation of Elastic Contact panel 1.
As shown in Figure 1, 2, the bottom of backplate 2 is triangular in shape, and the top of backplate 2 is provided with to be connected for rigid rod 8
Connecting pin 6；Top end surface in connecting pin 6 is provided with through-hole, and hydraulic ga(u)ge 5 is installed by the through-hole to the inside of backplate 2；Liquid
Pressure meter 5 is connected with signal wire 7；Signal wire 7 extends to 2 outside of backplate from the through-hole of 6 top end surface of connecting pin；Use process
In, signal wire 7 extends upwardly to ground with rigid rod 8, and hydraulic ga(u)ge 5 can be connect by signal wire 7 with data acquisition instrument.
As shown in Figures 1 to 4, it is in situ to further relate to a kind of soil pressure using above-mentioned soil pressure in-situ testing device for the present embodiment
The soil pressure home position testing method of test method, the present embodiment specifically includes following steps：
1）Soil pressure in-situ testing device is demarcated, initial pressure value is measured by hydraulic ga(u)ge in calibration process
P0；The test result of soil pressure in-situ testing device can be made more accurate by calibration；
2）Soil pressure in-situ testing device is buried into the soil body；During embedded, can according to the difference of the depth of burying, from
Method for embedding appropriate is chosen in the following two kinds method for embedding：
2a) when the soil pressure in-situ testing device depth of burying is smaller, directly soil pressure in-situ testing device can be pressed into
Inside soil layer；Specifically, as shown in figures 1 and 3, rigid rod 8 to be connected to the connecting pin at 2 top of backplate first, then really
Fixed embedded point position, the pre- of soil layer is pressed into finally by static pressure equipment together by rigid rod 8 and soil pressure in-situ testing device
If depth；
2b) when the soil pressure in-situ testing device depth of burying is larger, need to carry out Completion of Drilling Hole to soil layer；Specifically,
As shown in Figure 1 and Figure 4, rigid rod 8 is connected to the connecting pin at 2 top of backplate first, while being bored in face of soil layer on ground
The depth of hole pore-forming, drilling is smaller 0.2m or more than the depth of burying of soil pressure in-situ testing device, by rigid rod 8 together with soil pressure
In-situ testing device is transferred to the bottom of drilling, then soil pressure in-situ testing device is pressed to predetermined bury by rigid rod 8
Depth backfills drilling after the completion of pushing.
3）Read test data；In reading process, the reading of hydraulic ga(u)ge 5 is read by the signal wire 7 being connect with hydraulic ga(u)ge 5
P, according to step 1）With step 3）Measurement result calculate the soil pressure F of soil pressure in-situ testing device position；Soil pressure F
Calculation formula it is as follows：
F = {(P-P0)A2+Fs}/A1
Wherein, A1For the area that Elastic Contact panel 1 is contacted with the soil body, A2Fluid pressure for hydraulic chamber 3 acts on bullet
The area of property touch panel 1；FsFor four side friction resultant force of the Elastic Contact panel.
The advantageous effects of the present embodiment are：
（1）It is pressed into soil after soil pressure in-situ testing device is pressed directly into soil layer or part drills, due to backplate bottom
Portion is provided with the triangular construction convenient for burying, therefore smaller to the disturbance of the soil body, and due to being in indentation soil, backplate can be direct
It is contacted with original-pack soil where test position, ideal test effect can be obtained.
（2）Hydrostatic sensor is positioned over inside connecting pin；Hydrostatic sensor directly converts fluid pressure to electricity in underground
Signal transmission is to ground；Since underground environment is essentially constant temperature, therefore fluid pressure is not influenced by ambient temperature；
（3）Hydraulic chamber is that rigid material fixes support, only horizontal direction elasticity other than Elastic Contact panel
Touch panel can be moved forward and backward with soil pressure, therefore the mechanical concept of testing level to soil pressure is clear, the liquid pressure value measured
There are specific theory relations for conversion with horizontal direction soil pressure force value.
Embodiment 2：As shown in Figure 5,6, the main distinction of the present embodiment and embodiment 1 is the bottom shape of backplate 2
And the mounting means of hydraulic ga(u)ge 5；In the present embodiment, the bottom of backplate 2 is wedge shape；In the present embodiment, the top of hydraulic chamber 3
Portion offers pressure transmission pipe 4；Hydraulic ga(u)ge is mounted on the top of backplate 2, and is connected by pressure transmission pipe 4 and hydraulic chamber
It connects；The signal wire of hydraulic ga(u)ge 5 is arranged in the outside of rigid rod 8；In addition, top of the rigid rod 8 directly with backplate 2 in the present embodiment
Portion connects, and the top of backplate 2 does not have connecting pin.
Embodiment 3：As shown in Figure 7,8, the present embodiment is the mounting means of hydraulic ga(u)ge 5 with the main distinction for implementing 1；This
In embodiment, hydraulic ga(u)ge 5 is embedded the inner surface in hydraulic chamber 3, and hydraulic ga(u)ge 5 is directly connected to hydraulic chamber 3；In addition, this reality
It applies in example, the bottom of backplate 2 is arcuate structure.
Claims (5)
1. a kind of soil pressure in-situ testing device, it is characterised in that the soil pressure in-situ testing device includes backplate, described
The front of backplate is provided with a groove, is encapsulated in the open face of the groove and is provided with an Elastic Contact panel, the elasticity
Touch panel is enclosed closed hydraulic chamber with the groove；The hydraulic chamber is connected to hydraulic ga(u)ge, the hydraulic cavities
It is filled with liquid in vivo.
2. a kind of soil pressure in-situ testing device according to claim 1, it is characterised in that the backplate and rigid rod
Connection, the two are directly connected to or are connected by connecting pin.
3. a kind of soil pressure in-situ testing device according to claim 1, it is characterised in that the bottom of the backplate is
Triangle, wedge shape or arc.
4. a kind of soil pressure in-situ testing device according to claim 1, it is characterised in that the hydraulic ga(u)ge is connected with letter
Number line；The signal wire extends upwardly to ground.
5. a kind of soil pressure in-situ testing device according to claim 1, it is characterised in that the Elastic Contact panel is logical
The mode and the front of the backplate for crossing CONTACT WITH FRICTION are attached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721815868.2U CN207675554U (en) | 2017-12-22 | 2017-12-22 | A kind of soil pressure in-situ testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721815868.2U CN207675554U (en) | 2017-12-22 | 2017-12-22 | A kind of soil pressure in-situ testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207675554U true CN207675554U (en) | 2018-07-31 |
Family
ID=62969849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721815868.2U Active CN207675554U (en) | 2017-12-22 | 2017-12-22 | A kind of soil pressure in-situ testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207675554U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120645A (en) * | 2017-12-22 | 2018-06-05 | 上海岩土工程勘察设计研究院有限公司 | A kind of soil pressure in-situ testing device and its test method |
| CN109596258A (en) * | 2018-11-21 | 2019-04-09 | 河海大学 | A kind of reversible formula earth pressure gauge |
-
2017
- 2017-12-22 CN CN201721815868.2U patent/CN207675554U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108120645A (en) * | 2017-12-22 | 2018-06-05 | 上海岩土工程勘察设计研究院有限公司 | A kind of soil pressure in-situ testing device and its test method |
| CN108120645B (en) * | 2017-12-22 | 2024-01-05 | 上海勘察设计研究院(集团)股份有限公司 | Soil pressure in-situ testing device and testing method thereof |
| CN109596258A (en) * | 2018-11-21 | 2019-04-09 | 河海大学 | A kind of reversible formula earth pressure gauge |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 200093 No. 38 Shui Feng Road, Yangpu District, Shanghai. Patentee after: Shanghai Survey, Design and Research Institute (Group) Co.,Ltd. Address before: 200093 No. 38 Shui Feng Road, Yangpu District, Shanghai. Patentee before: SGIDI ENGINEERING CONSULTING (Group) Co.,Ltd. |