I N V E S T I G A T I O N O F E M P I R I C A L M E T H O D S F O R D E T E R M I N I N G B E A R I N G C A P A C I T Y O F R O C K-S O C K E T E D P I L E S
Author(s):
Abstract:
Rock-socketed piles can be realized as a suitable solution for the foundation systems of very heavy structures. Due to low settlement and high bearing capacities, these types of substructure are very efficient. The studies conducted by some researchers on the determination of the bearing capacity of shafts for rock-socketed piles, have been focused on parameters such as the compressive strength of rock ($q_{u} or sigma_{c}$), roughness of pile-rock interface and discontinuity in the rock mass. In this study, the compressive strength parameter was applied in order to examine the bearing capacity of rock-socketed piles, since this is much easier to be specified in comparison with others.A database has been compiled consisting of 63 full scale loading tests applied to rock-socketed piles with unconfined compressive strengths of the surrounding rock. The load bearing rocks include: limestone, mudstone, siltstone, shale and granite, with compressive strengths ranging from 1.1 to 54 (MPa). The embedment length and diameters of the RSP (rock-socketed piles) vary from 0.5 to 6 and 0.5 to 1.6 meters, respectively.The empirical equations suggested by various researchers were investigated and then compared with the results of the loading tests. For each bearing rock, an exponential equation from the loading test results has been fitted using a statistical approach. Then, the equations have been proposed for each individual type of rock. Also, a general equation was suggested for the determination of the bearing capacity of the shaft for rock-socketed piles, wherein the rock type is unknown or not among those discussed in this research. Finally, in order to consider the effects of the rock mass properties, a correction factor was proposed for the compressive strength, based on RMR (Rock Mass Rating), in which, the accuracy of such a factor was discussed using five case studies.
Keywords:
Language:
Persian
Published:
Sharif Journal Civil Engineering, Volume:30 Issue: 3, 2014
Pages:
51 to 63
magiran.com/p1403616
دانلود و مطالعه متن این مقاله با یکی از روشهای زیر امکان پذیر است:
اشتراک شخصی
با عضویت و پرداخت آنلاین حق اشتراک یکساله به مبلغ 1,390,000ريال میتوانید 70 عنوان مطلب دانلود کنید!
اشتراک سازمانی
به کتابخانه دانشگاه یا محل کار خود پیشنهاد کنید تا اشتراک سازمانی این پایگاه را برای دسترسی نامحدود همه کاربران به متن مطالب تهیه نمایند!
توجه!
- حق عضویت دریافتی صرف حمایت از نشریات عضو و نگهداری، تکمیل و توسعه مگیران میشود.
- پرداخت حق اشتراک و دانلود مقالات اجازه بازنشر آن در سایر رسانههای چاپی و دیجیتال را به کاربر نمیدهد.
In order to view content subscription is required
Personal subscription
Subscribe magiran.com for 70 € euros via PayPal and download 70 articles during a year.
Organization subscription
Please contact us to subscribe your university or library for unlimited access!