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A Surface Unloading Device for Slope Geotechnical Centrifugal Model Test

A technology of centrifugal model test and unloading device, which is applied in the test of basic structure, basic structure engineering, construction, etc., can solve the problems of affecting simulation results and stress loss, and achieve comprehensive simulation results, avoid stress loss, and simple structure. Effect

Active Publication Date: 2022-03-22
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of geotechnical slope engineering, there are many factors that induce slope failure. At the same time, with the failure of the surface soil of the slope, landslides, unloading on the slope, and accidents that cause secondary disasters on the entire slope also occur from time to time. , therefore, it is necessary to carry out effective simulation of slope unloading to reveal the impact of slope unloading on the entire slope. Excavation of the slope after shutdown of the existing test will cause stress loss, thus affecting the simulation results

Method used

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  • A Surface Unloading Device for Slope Geotechnical Centrifugal Model Test
  • A Surface Unloading Device for Slope Geotechnical Centrifugal Model Test
  • A Surface Unloading Device for Slope Geotechnical Centrifugal Model Test

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Please refer to Figure 1-3 , a slope geotechnical centrifugal model test surface unloading device, comprising a slope model 1, a loading frame 2 sleeved on the slope model 1 and at least covering the front slope of the slope model 1, a loading frame 2 and a side slope The loading cavity 3 between the front slopes of the slope model 1 and the granular loading material 5 filled in the loading cavity 3, the bottom of the loading frame 2 is provided with an openable discharge port communicating with the loading cavity 3 4. The loading frame 2 includes a frame 21 , a transparent side panel 22 and a front panel 23 arranged on the frame 21 . The panels used for shaping and positioning the loading chamber 3 on the loading frame 2 are all transparent plates, which is beneficial for real-time monitoring by the monitoring device in the centrifuge.

[0031] In the centrifuge model test, the slope model 1 is selected according to the slope to be measured, and the loading frame 2 ...

Embodiment 2

[0039] Please refer to Figure 4 , a slope geotechnical centrifugal model test surface unloading device, the difference from the first embodiment is that the test device also includes a hanging basket 9, and the hanging basket 9 has a bottom plate 91 and at least one side plate 92, the edge The slope model 1 is fixed on the bottom plate 91 of the hanging basket 9 and leans against the side plate 92 , and the slope model 1 includes a plurality of obliquely stacked model plates 11 .

[0040]The slope model 1 is formed by stacking modularized model plates 11, which facilitates the assembly of various slope models, facilitates the processing of the slope models, and is low in cost. The bottom and back of the slope model 1 are positioned and supported by the bottom plate 91 and the side plate 92 of the hanging basket 9, and the side and front slope are positioned by the loading frame 2 and the loaded granular loading material 5.

[0041] The frame 21 of the loading frame 2 include...

Embodiment 3

[0044] Please refer to Figure 5 , a slope geotechnical centrifugal model test surface unloading device, which is different from the above-mentioned embodiment 2 in that the top of the hanging basket 9 is provided with limiting pressure plates respectively pressed against the front and rear of the frame 21 94 and limit baffle 95. The top of the hanging basket 9 is provided with a basket rod 96, and the two ends of the position-limiting plate 94 are mounted on the basket rod 96 through the fastening sleeve 97 sleeved on the basket rod 96. The fixed sleeve 97 includes an outer half sleeve 971 and an inner half sleeve 972 which are respectively screwed up and down by bolts. The opening at the top of the inner half sleeve 972 is formed for passing through the limiting pressing plate 94 and inserting the end of the limiting pressing plate 94 into the fixed sleeve. Referring to the plate inlet 973 in the outer half sleeve 972 , at least one side of the tightening sleeve is provided...

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Abstract

The invention belongs to the field of slope tests, and in particular relates to a surface unloading device for a geotechnical centrifugal model test of a slope, comprising a slope model, a loading frame set on the slope model and at least covering the front slope surface of the slope model, The loading cavity between the loading frame and the front slope of the slope model and the granular loading material filled in the loading cavity, the bottom of the loading frame is provided with an openable discharge port communicating with the loading cavity, The loading frame includes a frame, a transparent side panel and a front panel arranged on the frame. The setting of the loading frame with the discharge port of the present invention can realize the excavation and unloading of the slope surface without stopping the machine during the centrifugal test, thereby simulating the dynamic unloading process of the actual slope prototype and avoiding the shutdown of the traditional test The stress loss caused by re-excavating the slope improves the accuracy of the simulation test.

Description

technical field [0001] The invention relates to the field of slope tests, in particular to a surface unloading device for slope geotechnical centrifugal model tests. Background technique [0002] Complex engineering problems are often encountered in geotechnical engineering. When the existing problems exceed the scope of the specification, special research must be carried out on complex problems. Centrifugal test technology is an important means to solve complex geotechnical engineering problems. The final model applies a gravitational field to reproduce the stress-strain of the prototype. Due to the diversity of construction conditions, the model of the model condition is quite important. [0003] The centrifugal model test is to apply a gravity field to the model through a centrifuge, and use the model to reflect the deformation and stress characteristics of the prototype. For example, the equipment disclosed in the application publication number CN 101906788 A for simul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00
CPCE02D33/00
Inventor 李波李从安龚壁卫刘军章广成胡勇向勇
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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