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Sandy underwater sediment dynamic response testing system

A dynamic response and test system technology, applied in soil material testing, material inspection products, instruments, etc., can solve problems such as inability to achieve simulation, and achieve the effect of strong scalability

Active Publication Date: 2020-09-11
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the pores in the sandy bottom sediment are connected with the overlying free water, while the focus of prior art analysis is still to separate the sandy bottom sediment from the overlying free water, and Indoor flume tests and shaking table tests cannot simulate the deep water mode, which leads to the inability of the test conclusions to fully explain the dynamic response of the foundation sand of hydraulic structures (structures), and the formed constitutive model is complex and has many parameters, which is difficult to popularize

Method used

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  • Sandy underwater sediment dynamic response testing system
  • Sandy underwater sediment dynamic response testing system
  • Sandy underwater sediment dynamic response testing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like figure 1 and figure 2 As shown, a dynamic response test system for sandy bottom sediments is used to test the effective stress and excess static pore water pressure growth and dissipation rules and influencing factors of sandy bottom sediments under vibration excitation, including the overall excitation system I , local vibration system II, sample room and pressure measurement system III, and pressurization system IV; among them, the overall vibration excitation system I, local vibration system II, sample room and pressure measurement system III are the main parts; Under the pressure test mode and high pressure test mode, there are three overall vibration excitation test modes of vertical vibration, lateral vibration and mixed vibration, and three local vibration excitation test modes of wave excitation, blasting excitation and mechanical vibration excitation.

[0045] like image 3 As shown, the overall vibration excitation system I includes an annular reaction...

Embodiment 2

[0049] like Figure 4 As shown, the annular reaction frame 101 includes an annular crown beam 10101 at the top, a chassis 10103 at the bottom, and a vertical rail 10102 fixedly connected between the two, and the three constitute a stainless steel cylindrical grid structure; Figure 5 As shown, the U-shaped sliding plate 103 includes a U-shaped plate body 10301 with a concave bottom. The outer surface of the side wall of the U-shaped plate body 10301 is provided with several groups of axially arranged peripheral beads 10302, and the inner surface of the bottom is provided with several tops. Surface embedded beads 10303, through the sliding between the peripheral embedded beads 10302 and the vertical rail 10102, the U-shaped sliding plate can slide up and down; Image 6 As shown, the sample chamber base 104 includes a disc body 10401 as a chassis, the bottom of the disc body 10401 is in contact with the top surface bead 10303 of the U-shaped sliding disc 103, and can slide freel...

Embodiment 3

[0052] There are 6 vertical rails, which are arranged on the cross-section to form a ring. The inner surface of the ring is smooth and used as a track; the inner arc length is not less than 0.314 meters.

[0053] All the other are identical with any one of embodiment 1-2.

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Abstract

The invention belongs to the technical field of civil engineering indoor tests, and particularly relates to a sandy underwater sediment dynamic response testing system. The sandy underwater sediment dynamic response testing system comprises an integral excitation system, a local excitation system, a sample chamber, a pressure measuring system and a pressurization system. Environmental free water and sandy water bottom sediments are used as research samples together; three overall vibration excitation test modes of vertical vibration, transverse vibration and mixed vibration and three local vibration excitation test modes of wave excitation, blasting excitation and mechanical vibration excitation under a normal-pressure test mode and a high-pressure test mode are utilized, the vibration liquefaction mechanism of the sandy underwater sediments is disclosed, and the change mechanism of the effective stress and the pore water pressure of the sandy underwater sediments under the dynamic load excitation is obtained.

Description

Technical field: [0001] The invention belongs to the technical field of civil engineering indoor tests, and in particular relates to a dynamic response test system for sandy bottom sediments. Background technique: [0002] Soil mechanics in geotechnical engineering is a highly experimental subject. The development of soil mechanics is essentially a process of continuous close integration and continuous advancement of classical mechanics theory and soil engineering tests. Geotechnical test is an important means to reveal the mechanical properties of sandy soil materials, determine engineering design parameters, and verify the correctness and practicability of theoretical and numerical calculations. At present, experimental soil mechanics has become an important branch of soil mechanics. After consulting the papers, it can be seen that the research on the dynamic characteristics of soil and its constitutive model, especially the research on vibration liquefaction and anti-liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/00G01N33/24
CPCG01N19/00G01N33/24
Inventor 解立波苏雷凌贤长杨忠年洪勇江焕芝周林禄张安琪
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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