Expert assistant for updating axial pile capacity from pile driving observations

Pile Dynamic Formulas are the oldest and frequently used method to determine bearing capacity of piles. The more recent method is based on the Wave Equation analysis and different formulations such as Case Mathod, TNO, CAPWAP and TEPWAP which were developed for pre-driving analysis and post-driving measurements applications. The major factors for the common use of the dynamic formulas have been due to their simplicity, cost effectiveness and applicability in various piling situations. However, in some literature the energy approach have been given an unfair reputation as being unreliable and less accurate than the more analytical or dynamic testing methods. One of the issues due to the poor performance of the dynamic formulas is that, historically, the hammer energy and the energy trasferred to pile had to be assumed. Nevertheless, with the advent of computers, new technologies are emerging with the advancement in construction industry. This has produced gradual improvements that have resulted in the dynamic method to be used on many projects with greater reliability. In this paper, a review of the different testing methods as well as pros and cons of the pile driving formulas are discussed. Also, an approach to improving the widely used Hiley dynamic equation is presented. This approach enables evaluation of the pile capacity to be made more accurately.

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Tapertube Pile Capacity Prediction: Pile Driving Analyzer versus Static Load Test

IFCEE 2021 ◽

10.1061/9780784483435.009 ◽

2021 ◽

Author(s):

Aly Mohammad ◽

Gisele R. Passalacqua ◽

Joanna Smith ◽

Subhash C. R. Mahali

Keyword(s):

Static Load ◽

Load Test ◽

Pile Driving ◽

Static Load Test ◽

Pile Capacity ◽

Capacity Prediction

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Change in pile capacity with time: case histories

Canadian Geotechnical Journal ◽

10.1139/t86-027 ◽

1986 ◽

Vol 23 (2) ◽

pp. 174-180 ◽

Cited By ~ 23

Author(s):

Laval Samson ◽

Jean Authier

Keyword(s):

Dynamic Analysis ◽

Key Words ◽

Pore Pressure ◽

Time Factor ◽

The Other ◽

Dynamic Monitoring ◽

Pile Driving ◽

Case Histories ◽

Construction Sites ◽

Pile Capacity

Four case histories where important changes in pile capacity were observed with time are presented. Two show an increase of pile capacity for shaft bearing piles driven into deep sand deposits. The increase occurred over a period longer than needed for pore pressure dissipation. In one case, increases of 33 and 85% in pile capacity were measured 2 and 51 days, respectively, after pile driving. The other two case histories deal with the decrease of pile capacity of close-toe pipe piles driven to shale bedrock. The decrease, determined using dynamic monitoring during initial driving and at restriking a few days later, ranged from 11 to 25%. It is concluded that restriking should be currently practiced on all construction sites to investigate any change in pile capacity after driving. This procedure is particularly recommended for toe bearing piles on shale bedrock. Key words: pile capacity, shaft bearing piles, toe bearing piles, relaxation, soil setup, pile dynamic analysis, shale, time factor, case histories.

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The effects of plugging on pile performance and design

Canadian Geotechnical Journal ◽

10.1139/t90-059 ◽

1990 ◽

Vol 27 (4) ◽

pp. 429-440 ◽

Cited By ~ 61

Author(s):

Samuel G. Paikowsky ◽

Robert V. Whitman

Keyword(s):

Dynamic Analysis ◽

Key Words ◽

Dynamic Behavior ◽

Time Dependent ◽

Limited Attention ◽

Pile Driving ◽

Pile Capacity ◽

Static Capacity ◽

Capacity Gain ◽

Open Pipe

During installation of open-pipe piles, soil enters the pile until the inner-soil cylinder develops sufficient resistance to prevent further soil intrusion and the pile becomes "plugged." In spite of its frequent occurrence, only limited attention has thus far been given to this phenomenon and its consequences. The effects of plugging on pile performance and design are examined in reference to the following aspects: ultimate static capacity, time-dependent pile capacity, and dynamic behavior. Pile plugging is shown to have the following effects: marked contribution to the capacity of piles driven in sand; delay in capacity gain with time for piles driven in clay; and change in behavior of piles during installation, causing it to differ from that described by the models commonly used to predict and analyze pile driving. Key words: pipe piles, pile plugging, open-ended piles, static capacity, time-dependent capacity, dynamic analysis, pile driving, pile performance.

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Analysis of the Carrying Capacity of the Pile Foundation Compared to Jacking System and Pile Driving Analyzer (PDA) Test

IJTI (International Journal Of Transportation And Infrastructure) ◽

10.29138/ijti.v3i2.1060 ◽

2020 ◽

Vol 3 (2) ◽

pp. 79-98

Author(s):

Choirus Soleh Rozeli

Keyword(s):

Carrying Capacity ◽

Pile Foundation ◽

Quantitative Data ◽

Soil Layer ◽

System Capacity ◽

Pile Driving ◽

Pile Capacity ◽

Survey Techniques ◽

Survey Technique ◽

Hydraulic Jacking

The foundation is a structure under the building that serves as a distributor of the load on it to the supporting ground layer. The pile capacity is obtained from the soil investigation results which is a sondir test. Sondir test is a technique of soil layer estimator to determine the type of foundation that will be used such as pile foundation. Hydraulic Jacking System is a equipment to pressure the pile. Pile Driving Analyzer Test is a system used for test the pile dynamically after erection. The purpose of this research is to know the method of bearing capacity of pile foundation calculation based on sondir data which approach Hydraulic Jacking System capacity and Pile Driving Analyzer Test capacity. This research method is quantitative. Data were collected using survey techniques. The survey technique is used to obtain generat data from the field. The data is processed using Schmertmann’s method, Philipponant’s method, and Andina’s method, and the results is compared with the Hydraulic Jacking System capacity and Pile Driving Analyzer Test capacity.

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Back Analysis of Mooring Pile Capacity Based on Pile Driving Data

10.4043/30842-ms ◽

2020 ◽

Author(s):

Fraser Gibson ◽

Howard Curtis

Keyword(s):

Back Analysis ◽

Pile Driving ◽

Pile Capacity

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ANALISIS DAYA DUKUNG TIANG AKSIAL TUNGGAL DENGAN METODE STATIS DAN DINAMIS TERHADAP HASIL UJI PILE DRIVING ANALYZE (PDA) PADA PEKERJAAN PONDASI PROYEK JAKARTA BOX TOWER

Menara: Jurnal Teknik Sipil ◽

10.21009/jmenara.v14i2.18119 ◽

2019 ◽

Vol 14 (2) ◽

Author(s):

Evi Puspita Sari ◽

Prihantono Prihantono ◽

Sittati Musalamah

Keyword(s):

Bearing Capacity ◽

Calculation Method ◽

Dynamic Test ◽

Pile Driving ◽

Test Results ◽

Dynamic Calculation ◽

Pile Capacity ◽

Test Result

The purpose of this research is to know the ratio of bearing pile capacity with some static and dynamic calculation method to Pile Driving Analyze (PDA) dynamic test result. The analysis uses static calculations using several methods namely, Meyerhoff, Vesic, α Thomlinson, and α Terzaghi, Peck and Mesri methods.Consultant calculation using Reese & Wright method. Dynamic bearing capacity uses jacking pile record from Hydrolic System Pile Driving (HSPD) and Pile Driving Analyze test results. The results showed that Reese & Wright method with SPT is the most closely approximated PDA test result with percentage 74,72%; 76.79% and 82.83% for number of pile 310, 368 and 763. While the result of comparison of jacking pile record that most approached PDA is on pile number 638 with a percentage of 82.83%. The largest settlement results are at pile number 310 and 763 with a decrease of 26.3 mm and 25.9 mm with α Vesic+Terzaghi, Peck and Mesri method

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Analytical model for an innovative pile test

Canadian Geotechnical Journal ◽

10.1139/t92-064 ◽

1992 ◽

Vol 29 (4) ◽

pp. 569-579 ◽

Cited By ~ 13

Author(s):

M. H. El Naggar ◽

M. Novak

Keyword(s):

Mathematical Model ◽

Bearing Capacity ◽

Model Parameters ◽

Pile Driving ◽

Driving Dynamic ◽

Pile Capacity ◽

Pile Test ◽

Response Dynamic ◽

Proposed Model ◽

New Type

In recent years a new type of pile test employing a short-duration load was developed that became known as pile statnamic test. The paper describes a method of dynamic analysis specifically formulated for this test. The aim of the analysis is twofold: to calculate the pile load displacements in such a way that a satisfactory match with the data measured during the test is obtained; and using the model parameters established from this comparison to predict the bearing capacity of the pile. The mathematical model is one-dimensional and accounts for slip as well as energy dissipation in the far field. Unlike the empirical parameters of the Smith model for pile driving analysis, the parameters of the proposed model are, for the most part, directly related to standard geotechnical parameters. The case studies conducted thus far and described in the paper indicate that the proposed mathematical model works very well and that the statnamic test may become a useful tool for pile capacity prediction. Key words : piles, pile driving, dynamic response, dynamic tests, bearing capacity.

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