Seismic profile solution under conditions of thawing permafrost with technogenic depression

Vlad Trapeznikov,Dmitry Maleev,S Kudryavtsev,C Yoo,A Zhussupbekov

doi:10.1051/matecconf/201926504011

Vlad Trapeznikov, Dmitry Maleev + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/201926504011

Copy DOI

Abstract

The article given presents the results of geophysical research of the certain types of geodynamical phenomenon, which is generally located on areas with permafrost soil layers. The detailed description to the research methods of refracting interface of the technogenic thawing ground area under the conditions of flooded pressure by refraction and reflection methods is given. Setting of the problem and detection of the nature of the changes in the properties and configuration of the permafrost and thawed soil layers in the grounds of embankment is practically solved by the integrated application of seismic methods that in theory have different kinematics due to propagation of elastic waves and methods of interpretation the seismic profile.

Highlights

The study of the conditions of occurrence, structure and thickness of the overburden is one of the main tasks of seismic exploration
It is necessary to give perform a particular seismic method which will compare the boundary conditions with possible use to geophysical model given and assessing its advantages and disadvantages over alternative methods [1]
The main types of seismic studies used in observing the conditions of such geological type, structure and thickness of frozen soils in the section are refraction and reflection surveys and vertical electrical sounding (VES) can be implemented

Summary

Introduction

The study of the conditions of occurrence, structure and thickness of the overburden is one of the main tasks of seismic exploration. Uneven thawing of soil and the influence of surface water determines the formation of sharp angles of the refracting boundary with its complex configuration and the formation of depressions The presence of these factors makes it impossible to study this geodynamic phenomenon using the method stated above. Based on seismic survey performed for the roof of permafrost in the conditions of exploitation of railway track of one of the stations of the eastern section of the Baikal/Amur railway, an area survey technique was developed that makes it possible to restore the refractive boundary of the permafrost layer by means of a combination of refracted and reflected wave methods. Simplification of the range of equipment and specialized software was used during seismic data processing which surved as the main advantage of the methodology presented

Development of a geophysical model

Seismic data processing

Conclusions