کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
311894 534152 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental study on the damage mechanism of tunnel structure suffering from sulfate attack
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
پیش نمایش صفحه اول مقاله
Experimental study on the damage mechanism of tunnel structure suffering from sulfate attack
چکیده انگلیسی

The function of tunnels is degraded due to sulfate ambient, which has spread widely in Western China. The characteristics of tunnel concrete damage, development of cracks, structure deformation, and the safety factor of tunnel liner suffering from sulfate attack are studied in this work using field investigation and laboratory tests. The main damage styles of tunnel lining structure included structure cracking, spalling, leakage filtration, degradation, and corrosion. These indicate that either physical damage by crystal erosion or chemical dissolution damage – or both – may have occurred. They appeared in the liners with weak waterproof ability, poor compaction, and high hydraulic gradient. The crack of the tunnel liner first developed at the vault, and there were more cracks at the vault than in other places when the load was high. Crack width and structure deformation increased with load and erosion time as exponential functions, whereas the safety factor was reduced as a negative exponential function.


► The published work on tunnel structure suffering sulfate ambient is scarce.
► The main damage styles of tunnel lining structure due to sulfate ambient were discussed.
► Damage mechanism of tunnel structure suffering sulfate ambient was studied.
► The variations of crack width and structure deformation against load and erosion time was presented.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tunnelling and Underground Space Technology - Volume 36, June 2013, Pages 5–13
نویسندگان
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