ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Two aspects of liquefaction of carefully prepared partly loosely packed sand are tested: the intensity of a liquefaction trigger and the extent of induced excess pore water pressures when partly liquefaction occurs. The results of several 1D and 3D tests are shown. It appears that hardly any liquefaction happens when the trigger intensity is small. When yet partly liquefaction occurs, significant excess pore pressures arise also in the non-liquefied surroundings. These excess pore pressures slowly diminish during the sedimentation of the liquefied mass. The related densification itself, the porosity decrease, is however so small that the sand remains loose and the likelihood of a new liquefaction to occur due to subsequent new triggers remains. So, if the intensity of a trigger is small and the corresponding liquefied zone is limited, rigorous measures at great expenses are not required to guarantee e.g. stability of buildings and dikes. However, in case a trigger is intense and liquefaction zone is large, its destructive impact can be far reaching particularly due to the related excess pore pressures in a much wider area.