CIVILICA We Respect the Science
(ناشر تخصصی کنفرانسهای کشور / شماره مجوز انتشارات از وزارت فرهنگ و ارشاد اسلامی: ۸۹۷۱)

گواهی نمایه سازی مقاله Laboratory Permeability Testing of Flexible Pavement Subgrade Soil

عنوان مقاله: Laboratory Permeability Testing of Flexible Pavement Subgrade Soil
شناسه (COI) مقاله: ICCE06_455_8776028142
منتشر شده در ششمین کنفرانس بین المللی مهندسی عمران در سال ۱۳۸۲
مشخصات نویسندگان مقاله:

Hossam F - Assistant Professor
Salim Al-Oreimi - Assistant Professor
Ali Al-Nuaimi -

خلاصه مقاله:
Permeability is an essential property of pavement materials and the subgrade soil for the estimation and analysis of water flow through the pavement. The essential factors in testing the permeability are the type of permeameter, hydraulic gradient, effective stress, head conditions, and how representative the sample is. Obtaining 100%saturation is always a problem especially with low hydraulic conductivity materials such as clays. This paper presents the determination of the saturated hydraulic conductivity for four different subgrade soils obtained from a construction project. A flexible wall permeameter is used. The soils were classified as CL, ML, SC, and SM according to the USCS. Permeability of the subgrade soil was in the order of 10-7 to 10-8 cm/sec. The permeability results obtained by assuming a constant head condition was close to that estimated assuming falling/rising condition. Therefore, the assumption of a constant head is recommended for ease of computation. The obtained permeability results agree well with data reported in the literature for the same type of soils. The high percentage of fines has a significant effect on reducing the permeability for coarsegrained soils.

کلمات کلیدی:
Permeability, Flexible wall permeameter, Subgrade soil, Flexible pavement

صفحه اختصاصی مقاله و دریافت فایل کامل: