Wave processes when driving metal pipes into the ground using shock-pulse generators

Isakov, A. L.; Shmelev, V. V.

doi:10.1007/bf02803446

Cited by 11 publications

(5 citation statements)

References 2 publications

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“…It is evident that the analytical solution describes the numerical solution with high precision except for a close-toimpact area. These curves qualitatively and quantitatively coincide with calculations obtained for the other model in [24]. In Fig.…”

Section: Comparison Of Numerical Calculation Data With Analytical Estsupporting

confidence: 89%

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Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part I: Nondeformable external medium

Aleksandrova

2012

J Min Sci

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The study focuses on propagation of longitudinal waves in an elastic pipe partly embedded in a medium with dry friction. Mathematical formulation of the problem on the impact pipe driving into the soil is based on the model of longitudinal vibration of an elastic rod with taking into account lateral resistance. The lateral resistance of soil is described by the law of the contact dry friction. Numerical and analytical solutions to problems on longitudinal impulse loading of a pipe are compared.

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Section: Comparison Of Numerical Calculation Data With Analytical Estsupporting

confidence: 89%

“…at time moment 100 = t ms at a semi-sinusoidal pulse action.Dependences of the maximums of velocity on a distance obtained numerically at the parameters: are identical to those in[24] for the other model, are plotted inFig. 10: curve 1 Curves 1-3 and[24] …”

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confidence: 81%

Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part I: Nondeformable external medium

Aleksandrova

2012

J Min Sci

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“…In nonlinear problems of seismodynamics of the underground structures, the model of the dry friction in the pipeline-soil interaction is used [12]. In [13], a finite-difference approximation of the equation of the motion of the rod with external dry friction was built, and an algorithm of the solution was constructed; later, this algorithm was used in [14][15][16]. In [17], vertical vibrations of the buildings with distributed and concentrated parameters are considered.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Vertical Earthquake Component on the Shear Vibration of Buildings on Sliding Foundations

et al. 2021

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The paper studied the vibrations of the buildings on the sliding foundation with dry friction under the action of real earthquakes at the intensity of 8 and 9 on the MSK-64 scale. It was developed a unique algorithm for calculating the displacements, velocities, accelerations, and shear forces resulting from the simultaneous action of the horizontal and vertical components of the seismogram record. It was studied four-story and nine-story buildings under the set of the three earthquake records. It was shown that the use of a sliding foundation does not always lead to a significant reduction in the shear force on the building floors and that the vertical component of the seismic effect has a significant influence on the shear vibration of the building.

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“…The finite element analysis in [35] uses the Coulomb law of the soil and pile contact friction, and the estimates are compared with the experiment data. Many experimental approaches to pipe driving in soil are reviewed in [36][37][38][39][40]. However, the researchers [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] left the nonstationary problems on the pile and soil interaction aside of their attention.…”

mentioning

confidence: 99%

“…Many experimental approaches to pipe driving in soil are reviewed in [36][37][38][39][40]. However, the researchers [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] left the nonstationary problems on the pile and soil interaction aside of their attention.…”

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confidence: 99%

Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part II: Deformable external medium

Aleksandrova

2013

J Min Sci

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Abstract-Under analysis is travel of P-waves in an elastic pipe partly embedded in soil with dry friction. The mathematical formulation of the problem on impact pipe driving in soil is based on the model of axial vibration of an elastic bar, considering lateral resistance described using the law of solid dry friction. The author solves problems on axial load on pipe in interaction with external elastic medium, and compares the analytical and numerical results obtained with and without accounting for the external medium deformability.Keywords: Axial waves, elastic bar, dry friction, pulsed loading, numerical modelingThe problems on the behavior of pipes in soil appear in many engineering procedures such as driving and pulling of piles, trenchless laying of underground utilities, underground pipework laying. Motion of various rods in mechanical systems always goes with friction. It is important to understand the influence exerted on wave process by friction of external environment and side surface of a pipe or a rod. Research of the interaction of bodies with friction is extensive .The wave processes in rods embedded in a medium were first considered by Gersevanov [11] in 1930, based on Saint-Venant's theory. Later on, propagation of P-waves in a rod with constantamplitude and different-oriented dry friction was an object of study [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. These studies assumed the rod was driven in undeformable medium. A general approach to solving such problems is reducing the nonlinear problem to a set of successively solved linear problems. It is required to define boundaries in time and axial coordinate for domains where friction has constant value and orientation. The axis of friction depends on the sign of the wave velocity. Solution in each of the domains is constructed considering the preliminary determined sign of the velocity. This approach allowed solving a lot of problems with sufficiently simple laws of loading exerted on the rod.Nonstationary and stationary one-dimensional problems on pipe and soil interaction by the law of external dry friction in the framework of the model of sonic and ultrasonic flow of a finite and infinite rod can be found in [8,13,15], and two-dimensional problem of pipe driving in soil is discussed in [19].Many researches focused on problems on piling [26][27][28][29][30][31][32][33][34][35]. In [26] experimental data on hammer accelerations are used to calculate distribution of soil resistance along a pile. In [27] a simple dynamic model is offered to find soil resistance coefficient in the course of piling; the calculated results are compared with the dynamic testing database, and it is discussed how to use the soil resistance model in the wave equation of the pile motion. Dynamic analysis of side surface of pile uses boundary element approach in [28], and the finite element method is chosen to solve axially symmetric twodimensional problem on piling, with algorithm of slip friction contact on the pile and soil interface in [...

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Wave processes when driving metal pipes into the ground using shock-pulse generators

Cited by 11 publications

References 2 publications

Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part I: Nondeformable external medium

Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part I: Nondeformable external medium

Influence of the Vertical Earthquake Component on the Shear Vibration of Buildings on Sliding Foundations

Numerical-analytical investigation into impact pipe driving in soil with dry friction. Part II: Deformable external medium

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