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Method and device for evaluating liquefaction damage of sandy seabed soil body under action of transient waves

A transient wave and seabed soil technology, which is applied in measuring devices, water resources assessment, climate change adaptation, etc., can solve problems such as slow assessment speed, achieve fast prediction speed and save computing resources

Active Publication Date: 2022-08-02
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a method and an evaluation device for evaluating sandy seabed soil liquefaction damage under the action of transient waves, It aims to solve the problem that the numerical evaluation method in the prior art requires a large number of numerical calculations, and the evaluation speed is relatively slow; on the other hand, the analytical solutions derived by the predecessors based on linear wave loads cannot be applied to transient wave effects such as solitary waves and tidal surges. Problems in assessing liquefaction damage of lower sandy seabed soils

Method used

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  • Method and device for evaluating liquefaction damage of sandy seabed soil body under action of transient waves
  • Method and device for evaluating liquefaction damage of sandy seabed soil body under action of transient waves
  • Method and device for evaluating liquefaction damage of sandy seabed soil body under action of transient waves

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no. 1 approach

[0048] The present invention provides such as Figure 1-3 A method for evaluating the liquefaction failure of sandy seabed soil under the action of transient waves is shown, including the following steps:

[0049] Step S1: Collect wave characteristics of transient waves, the wave characteristics include water depth h, characteristic wave amplitude A, characteristic period T, characteristic wavelength L, characteristic value P of seabed dynamic water pressure, and seabed surface dynamic water pressure p′ b .

[0050] Specifically: a series of waves generated in the sea, the wave surface of which changes with time, is a transient wave; the wave characteristics of the transient wave in the specific embodiment of the present invention are collected by a wave observation station. The observed transient waves include solitary waves, tidal surges, etc.

[0051] Step S2: Collect soil characteristics of the sandy seabed, where the soil characteristics include seabed thickness d, soil...

no. 2 approach

[0100] like Figure 4 As shown, the second embodiment of the present invention provides a device for evaluating the liquefaction damage of sandy seabed soil under the action of transient waves, including:

[0101] The first acquisition module is used to acquire the wave characteristics of the transient wave and send it to the storage module;

[0102] The second collection module is used to collect the soil characteristics of the seabed and send it to the storage module;

[0103] The calculation module is used to construct dimensionless variables related to the evaluation of seabed soil liquefaction damage according to the wave characteristics of transient waves and the soil characteristics of the seabed;

[0104] The processing module is used to analyze and calculate the excess static pore water pressure value and the vertical gradient value of the excess static pore water pressure of the sandy seabed soil under the action of transient waves;

[0105] The judgment module jud...

no. 3 approach

[0109] like Figure 5 As shown, the third embodiment of the present invention provides a network-side server, including: at least one processor 301; and a memory 302 communicatively connected to the at least one processor; wherein the memory 302 stores a Instructions executed by the at least one processor 301, the instructions are executed by the at least one processor 301, so that the at least one processor 301 can execute the above-mentioned one kind of transient wave action of sandy seabed soil Liquefaction damage assessment method.

[0110] The memory 301 and the processor 301 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 301 and various circuits of the memory 301 together. The bus may also connect together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further her...

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Abstract

The invention discloses a sandy seabed soil liquefaction damage assessment method under the action of transient waves. The method comprises the steps that wave characteristics of the transient waves are collected; collecting soil body characteristics of the sandy seabed; constructing an assessment-related dimensionless variable; calculating a hyperstatic pore water pressure value of the sandy seabed soil body under the action of the transient waves; calculating a vertical gradient value of the hyperstatic pore water pressure in the sandy seabed soil body under the action of the transient waves; according to the vertical gradient calculation value of the hyperstatic pore water pressure, a vertical gradient distribution diagram of the hyperstatic pore water pressure value is established, the vertical gradient distribution diagram and the sandy seabed soil liquefaction critical value are compared and analyzed, whether the seabed soil is liquefied or not is evaluated, and the seabed soil liquefaction area is analyzed. According to the method, the soil liquefaction damage risk is evaluated through the brand-new sandy seabed soil pore water pressure and the vertical gradient analytic solution thereof under the action of the transient waves, the technical defect that a traditional analytic solution evaluation method is not suitable for the transient waves is overcome, the prediction speed is high, and computing resources are saved.

Description

technical field [0001] The invention belongs to the technical field of seabed soil failure detection, and in particular relates to a method and an evaluation device for evaluating the liquefaction failure of sandy seabed soil mass under the action of transient waves. Background technique [0002] The interaction between waves and seabed is one of the key scientific issues in the field of port, coastal and offshore engineering research. The interaction between waves and seabed may lead to dynamic changes of seabed soil, and sandy seabed soil may change under extreme wave conditions. Liquefaction and loss of bearing capacity, thereby changing the characteristics of coastal terrain and threatening the safety of engineering structures. [0003] Compared with the silty or silty seabed, the permeability of the sandy seabed is better, and the wave load is often in the state of drainage consolidation, which can be described by the porous media model. The field survey results at hom...

Claims

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Application Information

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IPC IPC(8): G01M10/00G06F17/10
CPCG01M10/00G06F17/10Y02A90/30
Inventor 童林龙张继生沈中祥蒋来陈浩
Owner HOHAI UNIV
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