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Multifunctional test device for soil mechanics plane strain problem and test method thereof

A plane strain and test device technology, which is applied to educational appliances, teaching models, instruments, etc., can solve the problems of unreasonable setting of vertical and lateral loading devices, waste of time, energy and money, and influence on simulation effects, etc., and achieves simple structure, Improve the applicability and improve the effect of the simulation effect

Pending Publication Date: 2019-09-13
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to study different soil mechanics problems, the majority of engineering personnel or college teachers often need to design and manufacture different model boxes for demonstration, resulting in a huge waste of time, energy and money; the existing multifunctional test devices are mostly suitable for two types of simulation experiments. Three types, which have relatively large limitations in practical applications; the vertical and lateral loading devices are unreasonably set up, making it difficult to achieve stable and accurate loading, which affects the simulation effect

Method used

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  • Multifunctional test device for soil mechanics plane strain problem and test method thereof
  • Multifunctional test device for soil mechanics plane strain problem and test method thereof
  • Multifunctional test device for soil mechanics plane strain problem and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Experimental demonstration of roadbed subsidence or uneven settlement using the above-mentioned device, such as Figure 10 As shown, follow the steps below:

[0078] S1, select or prepare the soil required for the test, determine the filling height of the foundation model 13, the filling width, height and slope gradient of the subgrade model 11.

[0079] S2, when simulating the subgrade collapse, fill the foundation model 13 required for the test in the model box 1, and embed the water bag 8 in the foundation model 13 near the side wall of the model box 1, and the top of the water bag 8 is level with the bottom surface of the roadbed model 11 Qi, the water bag 8 is connected to the pool 10 outside the model box 1 through a water pipe, and the water pipe is provided with a valve 9 . When simulating the uneven settlement of the roadbed, the water bag 8 is buried inside the foundation model 13, the size of the water bag 8 for simulating the uneven settlement of the roadbe...

Embodiment 2

[0082] Using the above-mentioned device to carry out the demonstration of the pull-out test of the bar, such as Figure 11 As shown, follow the steps below:

[0083] S1, select or prepare the soil required for the test, select the type, specification and quantity of the reinforcement 17, and determine the vertical spacing of the reinforcement 17;

[0084] S2, fill the foundation model 13 required for the test in the model box 1, and bury the reinforcement material 17 in layers according to the requirements in the foundation model 13. One end of the reinforcement material 17 reserves a certain free end on the outside of the model box 1, and the free end wears The slit of the stacked side plate 31 is connected to the horizontal drawing device; the vertical loading device is evenly loaded on the top of the foundation model 13 through the rigid foundation 18, and the bottom of the rigid foundation 18 is uniformly equipped with a plurality of thin-film pressure sensors 19, and the ...

Embodiment 3

[0087] Use the above device to demonstrate the working principle of foundation pit support, such as Figure 12 As shown, follow the steps below:

[0088] S1, select or prepare the soil required for the test, and determine the parameters such as the height of the model and the depth of the foundation pit;

[0089] S2, fill the foundation model 13 required for the test in the model box 1, and use the winged slotted baffle 25 to simulate the support structure in the foundation pit. After the foundation model 13 is completed, the winged slotted baffle plate 25 is vertically buried in the soil to a certain depth, which is slightly greater than the design depth of the foundation pit, and then the foundation pit is excavated layer by layer from top to bottom and supported in time, and screwed The push rod 23 presses the winged slotted baffle 25 to prevent deformation of the foundation pit; a loading device is installed outside the top of the foundation pit, and the size of the rigid...

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Abstract

The invention discloses a multifunctional test device for a soil mechanics plane strain problem and a test method thereof. The device comprises a model box, a vertical loading device and a horizontalloading device, pressure sensors are installed at the positions, making contact with the surface of the foundation model, of the vertical loading device and the horizontal loading device respectively,strain sensors used for measuring strain capacity are arranged on the surface, stretching into the foundation model, of the test structure, and the pressure sensors and the strain sensors are connected with data acquisition equipment. An image acquisition device is installed outside the model box and is connected with a computer through a wireless network for real-time monitoring, or a memory card in the image acquisition device is inserted into the computer for reading. Loading is accurate and stable, and the simulation effect is improved, so that the reliability of a test result is improved; the structure is simple, the installation is convenient, the cost is low, the application is wide, resources are saved, and the problems in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of soil mechanics test devices, and relates to a multifunctional test device and a test method for soil mechanics plane strain problems. Background technique [0002] The simulation method is an experimental method to indirectly study the regularity of the prototype by creating a similar model in the laboratory according to the main characteristics of the prototype. According to the similar relationship between the model and the prototype, the simulation method can be divided into physical simulation and mathematical simulation. In the field of geotechnical engineering, indoor model testing is an effective means to reveal or predict the mechanical behavior and shape of geotechnical building prototypes, and plays an important role in structural design and analysis. A large part of problems in soil mechanics are considered as plane strain problems, such as slope stability, earth pressure on retaining walls, e...

Claims

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Application Information

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IPC IPC(8): G09B25/04
CPCG09B25/04
Inventor 方薇魏建国黄梅芳
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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