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Wave-induced liquefied soil particle motion test device and test method

A particle movement and test device technology, applied in measurement devices, climate sustainability, instruments, etc., can solve the problems of single measurement dimension, inability to accurately track changes in soil particle movement position, and large error in measurement results, and achieve accurate detection results. Effect

Pending Publication Date: 2022-08-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a wave-induced liquefaction soil particle movement test device and test method, aiming at solving the problem that the traditional direct measurement method in the prior art will greatly interfere with the movement of soil particles, resulting in measurement results The error is large, it is impossible to accurately track the movement position changes of soil particles, and the measurement dimension is single; it is impossible to imitate the actual wave movement mode to the greatest extent, resulting in the problem of low reference value of the measurement results

Method used

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  • Wave-induced liquefied soil particle motion test device and test method
  • Wave-induced liquefied soil particle motion test device and test method
  • Wave-induced liquefied soil particle motion test device and test method

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no. 1 example

[0045] The present invention provides such as Figure 1-8 Shown is a wave-induced liquefied soil particle motion device, including a test mechanism for simulating the environment in which ocean waves hit the soil; a wave-making mechanism, located on one side of the mechanism, used to create a motion pattern for simulating ocean waves, a detection mechanism, and part of the Set in the second test tank, it is used to detect the liquefaction depth of the test soil and calculate the velocity field of the test soil.

[0046] like Figure 1-2 As shown, the test mechanism includes a first test tank and a second test tank, the second test tank is arranged at the bottom end of the first test tank, the first test tank and the second test tank are connected, and the first test tank is filled with test water, The second test groove is filled with test soil, and the height of the test soil is flush with the bottom end of the first test groove to avoid the reflection effect of terrain on w...

no. 2 example

[0056] like Figure 9 As shown, the present invention discloses a motion test method for wave-induced liquefied soil particles, which is characterized by comprising the following steps:

[0057] S1: Adjust the vertical interval position and horizontal position of the pressure sensor;

[0058] Specifically, in the process of adjusting the pressure sensors, it is necessary to ensure that the distances between the plurality of pressure sensors are equal.

[0059] S2: Fill the test soil into the second test tank, so that the height of the test soil is flush with the bottom of the first test tank;

[0060] Specifically: the height of the test soil is kept flush with the bottom of the first test tank, to avoid the reflection effect of the terrain on the waves, and to simulate the real environment to the greatest extent, and the test soil is made of a mixture of soil particles and tracer particles. The mixing ratio of soil particles and tracer particles is 50:1, the mechanical prop...

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Abstract

The invention discloses a wave-induced liquefied soil particle motion test device, which comprises a test mechanism, and the test mechanism comprises a first test tank filled with test water and a second test tank filled with test soil; the wave making mechanism is arranged on one side of the testing mechanism and used for making simulated waves; and the detection mechanism is partially arranged in the second test tank and is used for detecting the liquefaction depth of the test soil and calculating the movement speed of the test soil. The wave making mechanism designed by the test device can realize three wave making modes of horizontal pushing or rotary swinging and synchronous realization of horizontal pushing and rotary swinging, so that irregular movement of sea waves is simulated to the greatest extent, and the test environment is closer to the real environment. According to the test method, the test soil formed by mixing the soil particles and the tracer particles is adopted, the position change image of the tracer particles is tracked in real time, meanwhile, the collected position change image is provided with scale marks, size measurement and analysis do not need to be conducted in the later period, and the movement velocity field of the tracer particles can be analyzed more accurately.

Description

technical field [0001] The invention belongs to the technical field of seabed soil motion detection, and in particular relates to a wave-induced liquefied soil particle motion test device and a test method. Background technique [0002] Waves are periodic and are one of the main hydrodynamic loads in nearshore areas. Under the action of wave loads, seabed soil may liquefy. [0003] The nonlinear coupling mechanism between the motion of soil particles and wave motion after liquefaction of seabed soil is complex. At present, the understanding of the motion characteristics of liquefied soil particles under the action of waves is not comprehensive, and there is a lack of reliable experimental research devices and experimental observation data. . [0004] After the liquefaction of seabed soil, soil particles form a high-concentration solid-liquid two-phase flow at the bottom of the water. The movement of soil particles has an important impact on the evolution of scour and deposi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00Y02A90/30
Inventor 童林龙陈宁沈中祥张继生
Owner HOHAI UNIV
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