Interpretation Method of Distributed Fibre Optic Strain Sensor in Instrumented Static Pile Load Test

2021 ◽  
pp. 772-778
Author(s):  
Nur Hidayah Mahadi ◽  
Hisham Mohamad
Keyword(s):  
Strain Sensor ◽  
Load Test ◽  
Fibre Optic ◽  
Pile Load Test ◽  
Interpretation Method

INSTRUMENTED PILE LOAD TESTING WITH DISTRIBUTED OPTICAL FIBRE STRAIN SENSOR

2015 ◽  
Vol 77 (11) ◽  
Author(s):  
Hisham Mohamad ◽  
Bun Pin Tee
Keyword(s):  
Load Transfer ◽  
Strain Sensor ◽  
Time Domain Analysis ◽  
Load Test ◽  
Load Testing ◽  
Fibre Optic ◽  
Strain Sensing ◽  
Residual Soils ◽  
Bored Pile ◽  
Test Pile

An instrumented pile load test was conducted for a 1.2m diameter bored pile at Putrajaya to verify pile performance towards geotechnical design. This test pile was instrumented with new monitoring technique using distributed strain sensing known as Brillouin Optical Time Domain Analysis (BOTDA) and compared with conventional sensors, i.e. vibrating wire strain gauge, LVDT (linear variable differential transformer) and dial gauge. This manuscript includes the description of subsurface conditions consisting of weathered granitic residual soils, test pile installation and instrumentation setup of Maintain Load Test (MLT). Field measurement results such as the load transfer response and average unit shaft resistance using the distributed fibre optic strain sensor were well matched with the results using the conventional sensors. However, the distributed fibre optic strain sensor has the added advantage of detecting the localized defect such as pile necking, bending, and overall behaviour of bored pile effectively. 

Active wavelength demodulation of Bragg fibre-optic strain sensor using acousto-optic tunable filter

1995 ◽  
Vol 31 (18) ◽  
pp. 1602-1603 ◽  
Author(s):  
T. Coroy ◽  
R.M. Measures ◽  
J.H. Belk ◽  
P.J. Ellerbrock
Keyword(s):  
Strain Sensor ◽  
Tunable Filter ◽  
Fibre Optic

scholarly journals Modelling the pile load test

2017 ◽  
Vol 107 ◽  
pp. 00033
Author(s):  
Ľubomír Prekop
Keyword(s):  
Load Test ◽  
Pile Load Test

Geotechnical Investigation, Field Load Test and Analysis of Full-Scale Bored Pile

2015 ◽  
Vol 813-814 ◽  
pp. 1126-1130
Author(s):  
G. Kesavan ◽  
S.S. Chandrasekaran
Keyword(s):  
Tamil Nadu ◽  
Ground Level ◽  
Maximum Load ◽  
Field Investigation ◽  
Complex Problem ◽  
Load Test ◽  
Bored Pile ◽  
Economical Design ◽  
Pile Load Test ◽  
A Site

The maximum load carrying capacity of bored piles is a complex problem because it is a function of a number of factors, these factors include methods of soil exploration, ground water condition, types of grading of concrete, quantity and quality of concrete. The knowledge of Geotechnical test is important for the most economical design of the piles. This paper describes some important aspects of field investigation, design and construction of in-situ bored pile foundation, field pile load test of experience gained from the construction of the pile at a site in Aathoor in Tamil Nadu, India. The site was fully sandy soil from existing ground level. The design of bored pile under axial compression was done using Empirical formula, pile load test and by using PLAXIS 2D software. Results were compared with vertical load and settlement in this site.

Predicting the Ultimate Bearing Capacity of Single Piles Based on CPTU

2011 ◽  
Vol 243-249 ◽  
pp. 4402-4407
Author(s):  
Yong Hong Miao ◽  
Guo Jun Cai ◽  
Song Yu Liu
Keyword(s):  
Load Test ◽  
Load Testing ◽  
Pile Capacity ◽  
Piezocone Penetration Test ◽  
Load Carrying ◽  
Load Tests ◽  
Pile Load Test ◽  
Single Piles ◽  
Pile Load Tests ◽  
Best Fit

Six methods to determine axial pile capacity directly based on piezocone penetration test (CPTU) data are presented and evaluated. Analyses and evaluation were conducted on three types piles that were failed during pile load testing. The CPT methods, as well as the CPTU methods, were used to estimate the load carrying capacities of the investigated piles (Qp ). Pile load test were used to determine the measured load carrying capacities (Qm). The pile capacities determined using the different methods were compared with the measured pile capacities obtained from the pile load tests. Two criteria were selected as bases of evaluation: the best fit line for Qp versus Qm and the arithmetic mean and standard deviation for the ratio Qp /Qm. Results of the analyses showed that the best methods for determining pile capacity are the CPTU methods.

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