نتایج جستجو برای: active grouted rockbolts

تعداد نتایج: 440032  

Journal: :IOP Conference Series: Materials Science and Engineering 2020

Journal: :Dyna 2021

For the failure mechanism of anchor cable lags behind practice demand for theoretical models, Abaqus technique was used to analyze anchoring performances grouted under conditions free and non-free rotating. The tension-torsion coupling characteristics progressive anchorage segment were studied during pull-out test. torsion response internal horizontal vertical strain changes in concrete also an...

Journal: :Applied sciences 2023

Strain burst hazard is one of the main challenges that faces deep underground environments. To manage it, it needed to assess its probability occurrence (or potential). Various methods have been proposed over years phenomenon early on. However, due uncertainties in rock mass properties and physical processes phenomenon, mitigation measures are an additional important line defense ensure workpla...

Journal: :AIJ Journal of Technology and Design 1998

Journal: :MATEC web of conferences 2023

Grouted post-tensioned (PTd) concrete systems are widely used in long-span segmental bridges with a target service life of 100+ years. However, the usage inadequate grout materials and grouting practices have resulted formation unwanted air voids duct, which turn led to premature corrosion (say, within about 20 years) strands failure tendons. Also, re-grouting/repairing void regions localized a...

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