Simulation method for pore pressure response of sediment under wave action

Abstract

Disclosed is a simulation method for the pore pressure response of the sediment under the wave action. Included is a simulation device. The process of the simulation test comprises a preparation stepand a test step. The preparation step is to firstly, determine hydrodynamic parameters and a sediment type according to the requirements of working conditions of the simulation test and then completethe preparation and laying of a sediment sample, equipment installation and connection, the hydrodynamic parameters including the simulated water depth, wave type and wave parameters; and secondly, pre-load a water body in a chamber, turn on a stirring mechanism, pour the sediment sample for the simulation test into the chamber while stirring, add water into the chamber, seal the chamber, and thenstatically consolidate the sediment. The test step includes simulation of the working conditions and data acquisition. The simulation method of the invention improves the accuracy of the water tank test and reduces the error caused by scaling down; and simplifies the complicated wave motion process into the change in the volume of water to control the change in the wave pressure on the surface ofthe seabed, thereby greatly reducing the volume and cost of the traditional water tank.

Description

technical field [0001] The invention relates to a sediment pore pressure measurement method, which belongs to the field of marine geological engineering, in particular to a full-scale simulation method of sediment pore pressure response under the action of waves. Background technique [0002] Marine sediment refers to the general term for seabed sediments formed by various marine depositions. The substances deposited on the seabed with seawater as the medium. The causes of deposition include various physical, chemical and biological factors. The formation of these sediments The process is often not carried out in isolation, and most of them are geological bodies produced by comprehensive effects. [0003] Submarine sediments may liquefy under the condition of repeated wave motion. The liquefaction of sediments will lead to a significant reduction in the bearing capacity of the soil, instability of offshore engineering facilities, endangering the safety of personnel and prope...

AI Technical Summary

Problems solved by technology

The system uses the principle of vibration liquefaction to measure the pore water pressure. It belongs to the in-situ measurement system. Due to the site conditions and environmental constraints, it cannot realize the simulated measurement of the pore pressure response under the action of various waves.

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