CN214503245U - Density lantern ring for geotechnical irrigation method test - Google Patents
Density lantern ring for geotechnical irrigation method test Download PDFInfo
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- CN214503245U CN214503245U CN202120425240.1U CN202120425240U CN214503245U CN 214503245 U CN214503245 U CN 214503245U CN 202120425240 U CN202120425240 U CN 202120425240U CN 214503245 U CN214503245 U CN 214503245U
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- Prior art keywords
- density
- lantern ring
- test
- water injection
- geotechnical
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002262 irrigation Effects 0.000 title claims abstract description 16
- 238000003973 irrigation Methods 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000002347 injection Methods 0.000 claims abstract description 39
- 239000007924 injection Substances 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 238000005056 compaction Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 22
- 230000008569 process Effects 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036314 physical performance Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model discloses a density lantern ring for geotechnical irrigation method test, which comprises a density lantern ring in a ring structure, wherein the density lantern ring is horizontally placed on the top side of a test pit, a film is laid on the inner side of the density lantern ring, a pressure detection device is arranged between the film and the top side of the test pit, one side of the density lantern ring is provided with a water injection pipe, and a flowmeter is arranged on the water injection pipe; the utility model discloses can save time and cost of labor, the density of the survey compaction fill out that can be faster has improved work efficiency, has reduced human error, has improved the detection data precision.
Description
Technical Field
The utility model relates to a geotechnique's irrigation method test technical field specifically indicates a geotechnique's irrigation method test density lantern ring.
Background
The earth-rock dam is a dam type widely adopted at home and abroad and developed faster. The earth-rock dam has the characteristics that the dam building materials can be adopted on the spot, the earth-rock dam can adapt to the deformation of the foundation, the structure is simple, the construction technology is simple, the tissue mechanization rapid construction is convenient, and the like. The earth and rockfill dam filling material sources are various in variety and different in physical performance, the main control index of the dam filling quality is dry density, and the most accurate detection method for controlling the large-scale earth and rockfill dam quality is a pit digging and water filling method.
The test for measuring the soil density by the earth-rock dam irrigation method is to position a detection part by using a density collar and level a filled irregular surface by using a water injection plane, and is characterized in that a water bag is used for measuring the difference value of twice water injection quantities of the same liquid level before and after pit digging of a point to be measured to calculate the volume of a test pit, and the ratio of the mass of the soil dug out in the test pit to the volume of the test pit is the density of the soil.
The existing test detection method adopts a mass method during water injection quantity measurement, water is manually injected into a test pit after successive weighing, water splashing or film damage can be caused in the weighing and water injection processes, and large artificial errors or test failure can be easily caused. When the water level and the liquid level are observed, a water level probe method or a full water method is often adopted, when the water level is measured by adopting the water level probe, the contact point between the probe and the water level is small, the reading is not easy to obtain, and after the water injection is finished, the liquid level area is large, and the data precision is low due to the fact that the fluctuation is easily caused by the influence of external environment vibration, wind power and the like; when a full water method is adopted, water in the density lantern ring needs to be filled to a critical point at which the upper edge of the lantern ring is about to overflow, when a detected object is large-particle-size rockfill filler, the maximum diameter of a test pit can reach 1.5-2.0 m, the primary water injection amount is too large, the water injection end point is not easy to control, and the influence of environmental vibration, wind power and the like can cause water injection overflow or film damage to generate leakage, so that the error is too large and even the test fails.
Disclosure of Invention
An object of the utility model is to overcome above-mentioned not enough, provide a geotechnique's irrigation method test density lantern ring to reduce human error, improve and detect the data precision.
The utility model discloses a solve above-mentioned technical problem, the technical scheme who adopts is: the density lantern ring for the geotechnical irrigation method test comprises a density lantern ring in a ring structure, wherein the density lantern ring is horizontally placed on the top side of a test pit, a film is laid on the inner side of the density lantern ring, a pressure detection device is arranged between the film and the top side of the test pit, a water injection pipe is arranged on one side of the density lantern ring, and a flowmeter is arranged on the water injection pipe.
Preferably, the top surface of the density lantern ring is also provided with a level gauge.
Preferably, the top side of the test pit corresponding to the bottom surface of the density lantern ring is provided with a positioning pin, and the bottom surface of the density lantern ring is provided with a positioning hole matched with the positioning pin.
Preferably, the density lantern ring is formed by connecting two semicircular iron rings, and the surface of the film is provided with a magnet pressing strip.
Preferably, a pressure sensor in the pressure detection device is connected with a controller, and the controller is connected with an electromagnetic valve on a water injection pipe.
Preferably, the bottom of the water injection pipe extends into the bottom of the density collar.
The utility model has the advantages that:
(1) the utility model discloses with experimental control key point liquid level height information datamation to can reduce artificial reading precision influence, but greatly reduced detection data error through controller visual display.
(2) The utility model discloses become the water injection volume measurement mode and directly read through the controller to but the direct control water injection volume reduces the loss error that artificial water injection process caused.
(3) The utility model discloses and change the method water injection point of will watering to density lantern ring bottom, arouse the surface of water undulant when having reduced the water injection, make control point reading ability rapid stabilization, reduce the impact to the film simultaneously, reduced the film and destroyed the probability, improved experimental success rate.
(4) The utility model discloses can save time and cost of labor, the density of the survey compaction fill out that can be faster has improved work efficiency, has reduced human error, has improved the detection data precision.
Drawings
FIG. 1 is a schematic structural diagram of a density lantern ring for geotechnical irrigation test during primary water injection;
FIG. 2 is a schematic structural diagram of a density lantern ring for geotechnical irrigation test during secondary water injection.
Detailed Description
The invention is described in further detail below with reference to the figures and the embodiments.
As shown in fig. 1 and 2, the density lantern ring for the geotechnical irrigation test comprises a density lantern ring 1 in a ring structure, wherein the density lantern ring 1 is horizontally placed on the top side of a test pit 3, a thin film 2 is laid on the inner side of the density lantern ring 1, a pressure detection device 4 is arranged between the thin film 2 and the top side of the test pit 3, a water injection pipe 5 is arranged on one side of the density lantern ring 1, and a flowmeter 6 is arranged on the water injection pipe 5.
Preferably, the top surface of the density lantern ring 1 is also provided with a level 7. The density lantern ring 1 can be adjusted and ensured to be in a horizontal state by the level gauge 7.
Preferably, the top side of the test pit 3 corresponding to the bottom surface of the density lantern ring 1 is provided with a positioning pin 8, and the bottom surface of the density lantern ring 1 is provided with a positioning hole matched with the positioning pin 8. Therefore, the density lantern ring 1 can not shift in the excavation process of the test pit, and the accuracy of measured data is ensured. After the first water injection, the film 2 needs to be temporarily withdrawn, then a sample is dug along the inner side of the density lantern ring 1 to form a test pit 3, and the pit digging process should be diffused from the center of the density lantern ring 1 to the outer edge until the size of the test pit meets the requirement.
Preferably, the density lantern ring 1 is formed by connecting two semicircular iron rings, and the surface of the film 2 is provided with a magnet pressing strip 9. Magnet layering 9 itself is the magnet material, and it can attract mutually with density lantern ring 1 to can compress tightly film 2 in density lantern ring 1 inside wall, need not set up the fastener in addition and carry out the fixed process to film 2.
Preferably, the pressure sensor in the pressure detection device 4 is connected to a controller 10, and the controller 10 is connected to an electromagnetic valve 11 on the water injection pipe 5. Pressure sensor in the pressure measurement device 4 can respond to the water pressure situation of 3 topside in the test pit in real time, and according to Archimedes' principle, density lantern ring 1 internal ring area is certain, so fixed water pressure corresponds 1 internal fixation water level of density lantern ring, and pressure sensor can give controller 10 with pressure data transmission, and when pressure data reached the setting value, controller 10 control solenoid valve 11 closed, can effectively reduce the error of artifical water injection like this. In this embodiment, the controller 10 may be a Siemens S7-300 PLC controller.
Preferably, the bottom of the water injection pipe 5 extends into the bottom of the density lantern ring 1. The utility model discloses and change the method water injection point of will watering to density lantern ring 1 bottom, arouse the surface of water undulant when having reduced the water injection, make control point reading ability rapid stabilization, reduce the impact to the film simultaneously, reduced the film and destroyed the probability, improved experimental success rate.
The working principle of the embodiment is as follows:
a primary water injection process: as shown in figure 1, in the density test by the water filling method, after the density lantern ring 1 is assembled, the density lantern ring 1 is placed on a point to be tested, the density lantern ring 1 is leveled by a level gauge 7, a water filling pipe 5 is connected with an external water source, the water source is opened, the air is exhausted, the reading of a flowmeter 6 is reset (the water for exhausting is discharged to the outside of a test area), a pressure detection device 4, a controller 10 and an electromagnetic valve 11 are connected, a film 2 is laid on the ground in the density lantern ring 1 to be tightly attached to the ground and the density lantern ring 1, after the upper ring in the density lantern ring 1 is fixed by a magnet pressing strip 9 in the annular direction, the electromagnetic valve 11 is opened to start water filling, when the water level in the ring reaches a certain height h, the electromagnetic valve 11 is closed to stop water filling, the pressure data of the flowmeter 6 and a display screen of the controller 10 are observed, and the water filling quantity V at the moment is recorded1And a pressure value P.
Digging a sample to form a test pit 3: the film 2 is temporarily withdrawn, then a sample is dug along the inner side of the density lantern ring 1 to form a test pit 3, the pit is dug vertically downwards from the center of the density lantern ring 1 to the outer edge in the pit digging process, the bottom of the pit is dug into a hemisphere shape after the diameter depth of the test pit is reached, and disturbance to the soil body of the pit wall is avoided during digging; when the pit wall is deeply sunken, filling soil in the pit; the pit wall should not have large protrusions and sharp edges, and the quality of the sample is called M.
And (3) secondary water injection process: and (3) as shown in fig. 2, the film 2 is laid upwards from the bottom of the test pit 3 again, the film 2 is tightly attached to the bottom of the test pit 3, and the upper part of the density lantern ring 1 fixes the film 2 by adopting a magnet pressing strip 9. After the reading of the flowmeter 6 is reset, the electromagnetic valve 11 is opened to start water injection to the film 2 in the test pit 3, the film 2 is lightly pressed by hands during water injection to ensure that the film 2 is tightly attached to the pit wall and the inner wall of the density lantern ring 1, pulling or tearing of the film 2 at the underwater part is avoided, when the pressure value reaches the pressure value P when water injection is stopped once, the controller 10 controls the electromagnetic valve 11 to be closed, and the water injection quantity V at the moment is recorded through the flowmeter 62。
And (4) calculating a result: the density of the sample soil can be calculated according to the following formula:
the above embodiments are merely preferred technical solutions of the present invention, and should not be considered as limitations of the present invention, and the features in the embodiments and the examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be defined by the claims and the technical solutions described in the claims, including the technical features of the equivalent alternatives as the protection scope. Namely, equivalent alterations and modifications within the scope of the invention are also within the scope of the invention.
Claims (6)
1. The utility model provides a geotechnique's method of watering test density lantern ring, includes density lantern ring (1) that is the ring structure, density lantern ring (1) are kept flat in examination hole (3) top side, its characterized in that: film (2) are laid to density lantern ring (1) inboard, be equipped with pressure measurement (4) between film (2) and test pit (3) top side, density lantern ring (1) one side is equipped with water injection pipe (5), be equipped with flowmeter (6) on water injection pipe (5).
2. The geotechnical irrigation test density collar of claim 1, wherein: the top surface of the density lantern ring (1) is also provided with a level gauge (7).
3. The geotechnical irrigation test density collar of claim 1, wherein: the top side of the test pit (3) corresponding to the bottom surface of the density lantern ring (1) is provided with a positioning pin (8), and the bottom surface of the density lantern ring (1) is provided with a positioning hole matched with the positioning pin (8).
4. The geotechnical irrigation test density collar of claim 1, wherein: the density lantern ring (1) is formed by connecting two semicircular iron rings, and the surface of the film (2) is provided with a magnet pressing strip (9).
5. The geotechnical irrigation test density collar of claim 1, wherein: and a pressure sensor in the pressure detection device (4) is connected with a controller (10), and the controller (10) is connected with an electromagnetic valve (11) on the water injection pipe (5).
6. The geotechnical irrigation test density collar of claim 1, wherein: the bottom of the water injection pipe (5) extends into the bottom of the density lantern ring (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425240.1U CN214503245U (en) | 2021-02-26 | 2021-02-26 | Density lantern ring for geotechnical irrigation method test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120425240.1U CN214503245U (en) | 2021-02-26 | 2021-02-26 | Density lantern ring for geotechnical irrigation method test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214503245U true CN214503245U (en) | 2021-10-26 |
Family
ID=78226463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120425240.1U Expired - Fee Related CN214503245U (en) | 2021-02-26 | 2021-02-26 | Density lantern ring for geotechnical irrigation method test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214503245U (en) |
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2021
- 2021-02-26 CN CN202120425240.1U patent/CN214503245U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211026 |