TY - GEN

T1 - Numerical simulation of forming a soil plug during the pipe immersion to the massif

AU - Kondratenko, Andrey S.

AU - Konurin, Anton I.

AU - Khmelinin, Alexey P.

AU - Gavrilov, Sergey Y.

AU - Khmelinin, Dmitry P.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The use of the trenchless method of laying underground communications is a profitable alternative to the use of open methods. The method of vibro-impact immersion of steel pipes with an open front end into the ground is widely used. Regular cleaning of the pipe from the formed soil core is one of the most important operations in this technology. The parameters of the soil plug (density, linear dimensions) depend on the physical and mechanical properties of the soil in which the work is performed. The purpose of this article is to establish the parameters for modeling the process of the formation of a soil plug when a pipe is dipped with an open end into a massif, as well as to determine the factors affecting the characteristics of the soil plug. The examples of construction of numerical models of soil massifs when immersing pipes during various technological operations are considered. A computational model of the interaction of the open end of the pipe with the soil mass under loading was constructed for solving by the finite element method in the ANSYS software package. The adopted approach to modeling of formation of a soil plug when the pipe is immersed with an open end into an massif allows to take into account the elastic-plastic properties of the soil, makes it possible to solve the contact problem for the system “surface of the pipe-soil array”. The main limitations and assumptions in modeling the process associated with the amount of computing resources are revealed. The results can be used to build a model of the interaction of the system, as well as in developing a computational model of the process of the combined cleaning of the pipe from the soil core.

AB - The use of the trenchless method of laying underground communications is a profitable alternative to the use of open methods. The method of vibro-impact immersion of steel pipes with an open front end into the ground is widely used. Regular cleaning of the pipe from the formed soil core is one of the most important operations in this technology. The parameters of the soil plug (density, linear dimensions) depend on the physical and mechanical properties of the soil in which the work is performed. The purpose of this article is to establish the parameters for modeling the process of the formation of a soil plug when a pipe is dipped with an open end into a massif, as well as to determine the factors affecting the characteristics of the soil plug. The examples of construction of numerical models of soil massifs when immersing pipes during various technological operations are considered. A computational model of the interaction of the open end of the pipe with the soil mass under loading was constructed for solving by the finite element method in the ANSYS software package. The adopted approach to modeling of formation of a soil plug when the pipe is immersed with an open end into an massif allows to take into account the elastic-plastic properties of the soil, makes it possible to solve the contact problem for the system “surface of the pipe-soil array”. The main limitations and assumptions in modeling the process associated with the amount of computing resources are revealed. The results can be used to build a model of the interaction of the system, as well as in developing a computational model of the process of the combined cleaning of the pipe from the soil core.

KW - Core

KW - Drilling

KW - Finite element method

KW - Numerical simulation

KW - Pipe

KW - Soil massif

KW - Soil plug

KW - Stress state

KW - Underground construction

UR - http://www.scopus.com/inward/record.url?scp=85073391232&partnerID=8YFLogxK

U2 - 10.5593/sgem2019/1.3/S03.057

DO - 10.5593/sgem2019/1.3/S03.057

M3 - Conference contribution

AN - SCOPUS:85073391232

T3 - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM

SP - 447

EP - 453

BT - Education and Accreditation in Geosciences; Environmental Legislation, Multilateral Relations and Funding Opportunities

PB - International Multidisciplinary Scientific Geoconference

T2 - 19th International Multidisciplinary Scientific Geoconference, SGEM 2019

Y2 - 30 June 2019 through 6 July 2019

ER -