CN210862622U - Model test soil body internal strain measuring device - Google Patents
Model test soil body internal strain measuring device Download PDFInfo
- Publication number
- CN210862622U CN210862622U CN201922468542.2U CN201922468542U CN210862622U CN 210862622 U CN210862622 U CN 210862622U CN 201922468542 U CN201922468542 U CN 201922468542U CN 210862622 U CN210862622 U CN 210862622U
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- model test
- soil
- strainometer
- strain
- soil body
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The utility model discloses an inside strain measurement device of model test soil body, including model test case, data acquisition instrument, horizontal strainometer and vertical strainometer, fill experimental soil in the model test case, a plurality of horizontal strainometer sets up in the experimental soil that model test case was filled according to experimental demand level, and the vertical strainometer of a plurality of passes through the data line and is connected with the outer data acquisition instrument of model test case according to the vertical setting of experimental demand in the experimental soil that model test case was filled. The device is through setting up horizontal strainometer and vertical strainometer in the proof box, and the strainometer passes through the data line and is connected with the data acquisition instrument, can accurately obtain the displacement of meeting an emergency of each position of the soil body in the proof box, and automatic acquisition data, data accuracy is high, and the acquisition speed is fast.
Description
Technical Field
The utility model relates to an inside strain measurement technical field of the soil body specifically is an inside strain measurement device of model test soil body.
Background
The soil model test is an important means in geotechnical engineering application and research, has the advantages of accuracy, intuition, good conformity with actual conditions and the like, and is widely used in recent years. An important link of the rock-soil mass model test is data acquisition inside the rock-soil mass. However, it is very difficult to collect the internal information of the rock-soil mass, and especially, accurate collection of the strain displacement data inside the rock-soil mass is still lack of a simple and accurate means.
The existing method suitable for measuring the internal strain of the soil body in the model test can only measure single point or vertical displacement in the soil generally, or adopts a transparent soil + image pickup pattern recognition technology, and no good method exists for measuring the strain of each part of the soil body in the model in each direction. Still some measuring device can only measure the vertical displacement of a certain depth range in the soil, adopt artifical reading moreover, and data acquisition is inefficient.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provide a device for measuring the internal strain of a soil body in a model test, which has a simple structure and can measure the strain displacement in the horizontal direction and the vertical direction and the strain and displacement of different parts in the soil body; the data is automatically acquired, the data precision is high, and the acquisition speed is high.
Realize the utility model discloses the technical scheme of purpose is:
the utility model provides an inside strain measurement device of model test soil body, including model test case, data acquisition instrument, horizontal strainometer and vertical strainometer, fill experimental soil in the model test case, a plurality of horizontal strainometer sets up in the experimental soil that model test case was filled according to experimental demand level, the vertical strainometer of a plurality of is according to the vertical setting of experimental demand in the experimental soil that model test case was filled, every horizontal strainometer and vertical strainometer pass through the data line and are connected with the outer data acquisition instrument of model test case.
The horizontal strain gauges are evenly and horizontally arranged in test soil filled in the model test box at intervals.
The vertical strain gauges are vertically arranged in test soil filled in the model test box at even intervals.
The model test box is a square box, the length is more than 30cm, the width is more than 30cm, and the height is more than 20 cm.
The model test soil is fine-grained soil, so that no gap is formed between a soil body and the strain gauge, and the model test soil comprises clay or sandy soil and the like.
The strain gauge adopts an embedded high-precision strain gauge and can generate cooperative deformation with the soil body.
The acquisition instrument is matched with the strain gauges by adopting a multi-channel acquisition instrument, and can simultaneously read information output by a plurality of strain gauges and automatically record and store the information.
The data line adopts the data line with good waterproofness and screen defect and 100% shielding coverage rate of the outer layer of tin foil.
The utility model provides a pair of inside strain measurement device of model test soil body, the device are through setting up horizontal strainometer and vertical strainometer in the proof box, and the strainometer passes through the data line and is connected with the data acquisition appearance, can accurately obtain the strain displacement of each position of the soil body in the proof box, and automatic data acquisition, data precision is high, and the acquisition rate is fast.
Drawings
FIG. 1 is a schematic structural diagram of a device for measuring internal strain of a model test soil body in an embodiment;
in the figure: 1. the test box comprises a model test box 2, test soil 3 in the model, a horizontal strain gauge 4, a vertical strain gauge 5, a data line 6 and a data acquisition instrument.
Detailed Description
The present invention will be further explained with reference to the drawings and examples, but the present invention is not limited thereto.
Example (b):
as shown in figure 1, the internal strain measurement device for the soil body in the model test comprises a model test box 1, a data acquisition instrument 6, 6 horizontal strain gauges 3 and 3 vertical strain gauges 4, wherein the model test box is a square box, the length of the square box is greater than 30cm, the width of the square box is greater than 30cm, and the height of the square box is greater than 20 cm. The model test box 1 is filled with test soil 2, the model test soil is fine-grained soil such as clay or sandy soil and the like, no gap is reserved between a soil body and the strain gauges, 6 horizontal strain gauges 3 are horizontally arranged in the test soil 2 filled in the model test box at uniform intervals according to test requirements, 3 vertical strain gauges 4 are vertically arranged in the test soil 2 filled in the model test box at uniform intervals according to the test requirements, and the horizontal strain gauges 3 and the vertical strain gauges 4 are embedded high-precision strain gauges and can generate cooperative deformation with the soil body; each horizontal strain gauge 3 and each vertical strain gauge 4 are connected with a data acquisition instrument 6 outside the model test box 1 through a data line 5 with good waterproofness and screen cheating performance and 100% shielding coverage rate of an outer layer of tin foil, and the multichannel acquisition instrument is matched with the strain gauges and can simultaneously read information output by the plurality of strain gauges and automatically record and store the information.
The use method of the device comprises the following steps:
1) laying a layer of test soil at the bottom of the model test box, leveling and compacting the soil, and uniformly arranging 6 horizontal strain gauges on the test soil at intervals, wherein the distance between each strain gauge and the bottom or the side wall of the model test box is more than 5 cm; then laying test soil on the horizontal strain gauge and rolling and compacting to ensure that no gap exists between the strain gauge and the soil body; meanwhile, each horizontal strain gauge is led out of the model test box body by using a data line independently and is connected with a data acquisition instrument;
2) before the model test box is not filled with soil, a vertical round pipe is placed at the position where the vertical strain gauge is pre-embedded, the strain gauge is placed in the round pipe, and the inner diameter of the round pipe is 2-5 mm larger than the outer diameter of the strain gauge; after filling soil to a certain height, slowly lifting out the circular tube in sections, exposing the strain gauge in the circular tube to directly contact with a soil body, and then compacting the filled soil; the subsequent filling is carried out according to the method until all the vertical strain gauges are buried in the soil body, and each strain gauge is led out by a data wire and is connected with a data acquisition instrument;
3) after the soil body in the model test box is completely filled, external load, illumination or rainfall is applied to the surface of the soil body, external factors cause certain strain and displacement in the soil body, the strain gauge and the surrounding soil body synchronously deform, and strain and displacement information is transmitted to an external acquisition instrument to be displayed or stored.
Claims (8)
1. The utility model provides an inside strain measurement device of model test soil body, a serial communication port, including the model test case, the data acquisition appearance, horizontal strainometer and vertical strainometer, fill experimental soil in the model test case, a plurality of horizontal strainometer sets up in the experimental soil that the model test case was filled according to experimental demand level, the vertical strainometer of a plurality of is in the experimental soil that the model test case was filled according to the vertical setting of experimental demand, every horizontal strainometer and vertical strainometer pass through the data line and are connected with the outer data acquisition appearance of model test case.
2. The device for measuring internal strain of model test soil according to claim 1, wherein the plurality of horizontal strain gauges are horizontally arranged in the test soil filled in the model test box at even intervals.
3. The device for measuring the internal strain of the model test soil body according to claim 1, wherein the plurality of vertical strain gauges are vertically arranged in the test soil filled in the model test box at even intervals.
4. The device for measuring the internal strain of a model test soil body according to claim 1, wherein the model test box is a square box, the length of the square box is more than 30cm, the width of the square box is more than 30cm, and the height of the square box is more than 20 cm.
5. The device for measuring the internal strain of the model test soil body according to claim 1, wherein the model test soil is fine-grained soil, so that no gap is formed between the soil body and the strain gauge.
6. The device for measuring the internal strain of the model test soil body as claimed in claim 1, wherein the strain gauge is an embedded type high-precision strain gauge.
7. The device for measuring the internal strain of the model test soil body according to claim 1, wherein the acquisition instrument is matched with the strain gauges by adopting a multi-channel acquisition instrument, and simultaneously reads the information output by the plurality of strain gauges, and automatically records and stores the information.
8. The device for measuring the internal strain of the model test soil body according to claim 1, wherein the data wire has waterproofness and shielding property, and the shielding coverage rate of an outer layer of tin foil is 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468542.2U CN210862622U (en) | 2019-12-31 | 2019-12-31 | Model test soil body internal strain measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922468542.2U CN210862622U (en) | 2019-12-31 | 2019-12-31 | Model test soil body internal strain measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210862622U true CN210862622U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922468542.2U Expired - Fee Related CN210862622U (en) | 2019-12-31 | 2019-12-31 | Model test soil body internal strain measuring device |
Country Status (1)
| Country | Link |
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| CN (1) | CN210862622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279862A (en) * | 2021-11-17 | 2022-04-05 | 莆田学院 | Stress-strain three-dimensional test platform and test method |
-
2019
- 2019-12-31 CN CN201922468542.2U patent/CN210862622U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279862A (en) * | 2021-11-17 | 2022-04-05 | 莆田学院 | Stress-strain three-dimensional test platform and test method |
| CN114279862B (en) * | 2021-11-17 | 2023-12-26 | 莆田学院 | Stress-strain three-dimensional test platform and test method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 Termination date: 20201231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |