نوع مقاله : مقاله پژوهشی
نویسنده
گروه مکانیک سنگ و تونلسازی، دانشکده مهندسی معدن، دانشگاه امیرکبیر، تهران، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
The penetration rate is a crucial parameter in the performance of Earth Pressure Balance (EPB) Tunnel Boring Machines (TBMs), which is used to assess the time and cost of completing a project. However, so far, no model has been presented to predict the penetration rate in soft soils, leading engineers to rely on approximate estimations based on similar projects. This results in significant inaccuracies in project completion time. In this article, statistical analysis has been conducted using performance data from EPB TBMs worldwide to examine the correlation between the penetration rate and its influencing factors. The parameters discussed include tunnel diameter, face pressure, undrained shear strength, unconfined compressive strength, head opening ratio, and standard penetration number. Based on the data analysis, three parameters, namely head opening ratio, unconfined compressive strength, and standard penetration number, have been identified as significant influencing factors. This article provides useful relationships for estimating the penetration rate with determination coefficients ranging from 68% to 72%. Considering the absence of an accurate performance prediction model for soft ground TBMs, the results of this study assist tunnel project engineers in the initial stages of the project by enabling better evaluation of performance parameters, time, and cost requirements.
کلیدواژهها [English]
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