کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6783288 | 534121 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Critical embedment length and bond strength of fully encapsulated rebar rockbolts
ترجمه فارسی عنوان
طول جابجایی بحرانی و استحکام باند کامیون های سنگین به عقب
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
A series of rock bolt pull tests were carried out in the laboratory to determine the critical embedment length of a specific type of fully cement-grouted rebar bolt. The rebar bolt is 20Â mm in diameter, and it is widely used in underground excavations in Norway. Three water-cement (w/c) ratios were used in the tests. It was discovered that the critical embedment length of the rock bolts was approximately 25Â cm for the water-cement ratio 0.40 (the corresponding uniaxial compressive strength (UCS) of the grout is 37Â MPa), 32Â cm for the ratio 0.46 (UCS 32Â MPa), and 36Â cm for the ratio 0.50 (UCS 28Â MPa), for the specific type of cement, Rescon zinc rock bolt cement. It was found that the bond strength of the rock bolt is not a constant but is related to the embedment length. The bond strength was linearly proportional to the UCS of the grout.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tunnelling and Underground Space Technology - Volume 59, October 2016, Pages 16-23
Journal: Tunnelling and Underground Space Technology - Volume 59, October 2016, Pages 16-23
نویسندگان
Charlie C. Li, Gunnar Kristjansson, Are Håvard Høien,