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Determination of Young Elasticity Modulus in Bored Piles Through the Global Strain Extensometer Sensors and Real-Time Monitoring Data
oleh: Hossein Moayedi, Bahareh Kalantar, Mu’azu Mohammed Abdullahi, Ahmad Safuan A. Rashid, Ramli Nazir, Hoang Nguyen
Format: | Article |
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Diterbitkan: | MDPI AG 2019-07-01 |
Deskripsi
For friction piles depending on the friction resistance, accurate prediction of unit skin friction around the pile shaft is the dominant resistance to measure the final bearing capacity of a bored-pile. The present study measures the stress−strain transferring in two instrumented bored-piles (BP #1 & BP# 2) embedded within the soil layer in Kuala Lumpur by real-time monitoring global strain extensometer (GSE) sensors. Two bored-piles (i.e., having 1.80 m and 1.0 m diameters, as well as 36 m and 32 m lengths) have been loaded with two times to their design working loads. Extensive data are analyzed to measure the changes in stress−strain in the bored-pile. The effect of loading and unloading stages on the pile’s head and base settlement has been monitored, indicating that Young modulus of elasticity in concrete bored-pile (<inline-formula> <math display="inline"> <semantics> <mrow> <msub> <mi>E</mi> <mi>c</mi> </msub> </mrow> </semantics> </math> </inline-formula>), average strain, and unit skin friction changed along the bored-pile based on the ground site conditions and stress registered. One example of two case studies with great real-time monitoring data has been provided to further design.