دانلود Importance of Controlling the Degree of Saturation in Soil Compaction

دانلود مقاله Importance of Controlling the Degree of Saturation in Soil Compaction
قیمت : 315,000 ریال
شناسه محصول : 2009028
نویسنده/ناشر/نام مجله : Procedia Engineering
سال انتشار: 2016
تعداد صفحات انگليسي : 10
نوع فایل های ضمیمه : pdf+word
حجم فایل : 687 Kb
کلمه عبور همه فایلها : www.daneshgahi.com
عنوان انگليسي : Importance of Controlling the Degree of Saturation in Soil Compaction

چکیده

Abstract

In the typical conventional fill compaction, the dry density ρd and the water content w are controlled in relation to (ρd)max and wopt determined by laboratory compaction tests using a representative sample at a certain compaction energy level CEL. Although CEL and actual soil type affect significantly the values of (ρd)max and wopt, they change inevitably in a given earthwork project while CEL in the field may not match the value used in the laboratory compaction tests. Compaction control based on the stiffness of compacted soil in the field has such a drawback that the stiffness drops upon wetting more largely as the  degree  of  saturation,  Sr,  of  compacted  soil  becomes  lower  than  the  optimum  degree  of  saturation (Sr)opt defined as Sr when (ρd)max is obtained for a given CEL. In comparison, the value of (Sr)opt and the ρd/(ρd)max  vs.  Sr  -  (Sr)opt  relation of compacted soil  are rather insensitive  to variations in  CEL and soil type, while the strength and stiffness of unsoaked and soaked compacted soil is controlled by ρd and “Sr at the end of compaction”. It is proposed to control not only w and ρd but also Sr so that Sr becomes (Sr)opt and ρd becomes large enough to ensue soil properties required in design.

Keywords: Degree of compaction Degree of saturation Dry density

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