کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1704877 1012418 2012 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Formation and accumulation of contact deficiencies in a tunnel segmented lining
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Formation and accumulation of contact deficiencies in a tunnel segmented lining
چکیده انگلیسی

Damages observed in tunnels constructed with tunnel boring machines affect the overall quality of the structure and the efficiency of the construction process. Most of these damages are caused by contact deficiencies between segments that are generated by the sum of several tolerances on the shape and on the placement of the lining. Moreover, the imperfection of one ring affects the placement of the following ones, inducing an accumulation mechanism that magnifies the imperfection expected due to the sum of tolerances in a single isolated ring. The overall consideration of these phenomena yields an intricate analysis that must take into account some important probabilistic aspects. This paper explains how the tolerances may evolve into the contact deficiencies found in practice. Initially the types of tolerances and contact deficiencies more likely to affect the structural behavior of the lining are analyzed. A mathematical model is proposed to explain the relation between tolerances and contact deficiencies. The predictions obtained with the model are then compared with the measurements performed in the tunnel of Line 9 in Barcelona. The results obtained reinforce the importance of the model proposed in this study, which quantifies aspects that so far could only be studied qualitatively or on a trial and error basis.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Mathematical Modelling - Volume 36, Issue 9, September 2012, Pages 4422–4438
نویسندگان
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