نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 گروه مهندسی عمران، دانشگاه بناب، بناب، آذربایجان شرقی، ایران.
2 گروه مهندسی عمران، دانشگاه بناب، بناب، آذربایجان شرقی، ایران
3 مهندسی ژئوتکنیک، دانشگاه آزاد اسلامی واحد قزوین
4 گروه مهندسی عمران، دانشگاه بناب، بناب، اذربایجان شرقی، ایران
5 گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه بناب، بناب، آذربایجان شرقی، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This study intends to investigate the specifications of the dynamic properties of sand with 60% non-plastic silt, improved by cement and different percentages of Montmorillonite nanoclay (nanoclay will replace some parts of the cement contents) using a cyclic triaxial strain control test subjected to confining pressure and different strain ranges. Shear modulus, damping ration and liquification of the normal (without treatment) and stabilized soil with cement and nanoclay. In this study, initially the dynamic parameters (shear modulus and damping ratio) of the fine-grained silty soil were investigated by cyclic triaxial experiments. Based on the results, with increasing shear strain, the stiffness created at the inter granular contact surfaces diminished and caused loosening and rupture of the cement paste joints. This event, also freed the confinement caused by the stiffness and ultimately by increasing the strain levels, it reduced the shear modulus. And shear modulus values decrease and damping increases for all specimens, including silty sand, cemented silty sand and nano-clay cemented silty sand specimens, with increasing shear strain. For all specimens, including silty sand, cemented silty sand, and nano-clay cemented silty sand specimens, the shear modulus values increased and damping diminished with elevating the confining pressure.
کلیدواژهها [English]
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