A study on the application of the parallel seismic method in pile testing

Abstract Parallel seismic testing of pile is theoretically studied using the ray path theory and the elastodynamic finite integration technique (EFIT). According to the basic principles and the testing process, the practical pile model is simplified as a space axisymmetric problem, and the definite solution can be obtained with given boundary and initial conditions. The EFIT is a simple numerical tool and employed in this study. A more accurate method for determining the pile length is presented based on ray path theory, the effects of pile-to-borehole distance and other parameters on the testing results are numerically analyzed in detail. In addition, parallel seismic testing is compared with the low-strain pile integrity testing with respect to the pile with a cap. The former has good performance in determining the pile length. Also, neck or expansion part in the pile body is well able to be identified.

[1]  Sheng-Huoo Ni,et al.  Measurement of unknown bridge foundation depth by parallel seismic method , 2009 .

[2]  E J Mercado,et al.  TWO NEW NON-DESTRUCTIVE METHODS TO MEASURE SCOUR DEPTH AND THE DEPTH OF UNKNOWN FOUNDATIONS , 2000 .

[3]  Liu Dong-jia.  Numerical computation of axisymmetric problems in low strain integrity tests on piles , 2006 .

[4]  Michael W. O'Neill,et al.  GEOPHYSICAL SURVEY TECHNIQUES TO DETERMINE LENGTHS OF PILES AND DRILLED SHAFTS , 2000 .

[5]  Alain Holeyman,et al.  Numerical simulation of low strain dynamic pile tests , 2008 .

[6]  Zhi Liang Wang,et al.  Study on low‐strain integrity testing of pipe‐pile using the elastodynamic finite integration technique , 2013 .

[7]  Mark K. Hinders,et al.  Lamb Wave Detection of Delaminations in Large Diameter Pipe Coatings , 2009 .

[8]  F. Schubert,et al.  THREE-DIMENSIONAL TIME DOMAIN MODELING OF ULTRASONIC WAVE PROPAGATION IN CONCRETE IN EXPLICIT CONSIDERATION OF AGGREGATES AND POROSITY , 2001 .

[9]  Jian-Hua Tong,et al.  Numerical simulation and experimental study of Parallel Seismic test for piles , 2006 .

[10]  Cara A. C. Leckey,et al.  Multiple-mode Lamb wave scattering simulations using 3D elastodynamic finite integration technique. , 2012, Ultrasonics.

[11]  Hua-You Chai,et al.  Effects of the Source on Wave Propagation in Pile Integrity Testing , 2010 .

[12]  Sheng-Huoo Ni,et al.  Inclination correction of the parallel seismic test for pile length detection , 2011 .

[13]  Kevin R Leonard,et al.  Simulation of guided waves in complex piping geometries using the elastodynamic finite integration technique. , 2007, The Journal of the Acoustical Society of America.

[14]  Frank Schubert,et al.  Numerical time-domain modeling of linear and nonlinear ultrasonic wave propagation using finite integration techniques--theory and applications. , 2004, Ultrasonics.

[15]  Mark K. Hinders,et al.  3D ELASTODYNAMIC FINITE INTEGRATION TECHNIQUE SIMULATION OF GUIDED WAVES IN EXTENDED BUILT-UP STRUCTURES CONTAINING FLAWS , 2010 .

[16]  Determining The Length Of H And Sheet Piles Using The Parallel Seismic Method , 2008 .

[17]  L. D. Bibee,et al.  Simulation of acoustic scattering from an aluminum cylinder near a rough interface using the elastodynamic finite integration technique , 2010 .

[18]  Sheng-Huoo Ni,et al.  Experimental study for the evaluation of stress wave approaches on a group pile foundation , 2012 .

[19]  N. Null.  Minimum Design Loads for Buildings and Other Structures , 2003 .

[20]  Holger Waubke,et al.  A SIMPLE METHOD FOR COMPUTING THE GREEN FUNCTIONS OF THE HELMHOLTZ EQUATION IN THE TWO-DIMENSIONAL IMPEDANCE HALF SPACE , 2010 .

[21]  Bernd Köhler,et al.  The elastodynamic finite integration technique for waves in cylindrical geometries , 1998 .

[22]  Ming Liu,et al.  Borehole NDT techniques for unknown subsurface bridge foundation testing , 1996, Smart Structures.