An evaluation method for submarine landslides based on laboratory tests

Abstract

The invention discloses a seabed landslide evaluation method based on an indoor test. The method comprises preparation of structural soft clay and the indoor test. The preparation of the structural soft clay comprises the following steps: doping silicate 525 cement into marine soft soil, adding water to 2 times the liquid limit of a soil body, and uniformly stirring under a vacuum condition, thereby obtaining the structural soft clay, wherein the addition amount of the silicate 525 cement is 2% of the mass of the soft soil particles; the indoor test is realized based on a novel indoor test device for simulating seabed landslide. The device comprises a model box main body, a false slope, a funnel, a soil cutting plate, a sensor bracket and a portal frame lifting device. According to the method, test simulation of the submarine landslide with multiple slope angles and multiple working conditions can be achieved, the method can be combined with an indoor large section wave gutter channel,and the influence of the coupling effect of waves, slope toe scouring and rapid deposition on the submarine landslide is systematically researched, and the systematic method for evaluating the stability of the submarine landslide is obtained.

Description

technical field [0001] The invention relates to a set of test devices capable of simulating seabed landslides with multiple slope angles and multiple working conditions, in particular to an evaluation method for seabed landslides based on indoor tests, which is applicable to the field of marine engineering research. Background technique [0002] As we all know, the conventional energy reserves such as oil and natural gas in the ocean are very rich. According to incomplete statistics, in the world, the offshore oil reserves are about 145 billion tons, accounting for 34% of the world's total oil reserves, of which the proven reserves are about It is 38 billion tons; only in the continental shelf area, the area of ​​oil and gas basins discovered so far reaches 15 million square kilometers, more than 800 oil and gas basins, more than 1,600 oil and gas fields have been discovered, and the geological reserves of natural gas reach about 140 trillion cubic meters . [0003] my coun...

AI Technical Summary

Problems solved by technology

[0005] However, most of the current studies use theoretical analysis and numerical calculations, and almost no laboratory test evaluation methods can simultaneously consider the influence of the coupling of slope angle change, slope toe erosion, and rapid deposition on submarine landslides.

Images