کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11024212 | 1701172 | 2019 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of vacuum removal on consolidation settlement under a combined vacuum and surcharge preloading
ترجمه فارسی عنوان
اثر حذف خلاء در محلول سازی تلفیقی با استفاده از خلاء ترکیبی و پیش بارگیری اضافی
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کلمات کلیدی
ژئوسنتتیک، پیش بارگیری خلاء و اضافی، حذف خلاء، تخلیه، جهت تنش اصلی توافق،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
The combined vacuum and surcharge preloading technique is extensively used to accelerate the consolidation process of subsoils. The effect of vacuum pressure is often considered as a loading/unloading cycle of mean effective stress, such that elastic rebound occurs after vacuum removal, which cannot explain the observed postconstruction settlement in the field. In this study, the stress state of subsoils subject to vacuum and surcharge preloading is analyzed and decomposed into two components: (a) geostatic consolidation at a different depth, and (b) loading/unloading in the minor principal stress direction. A series of consolidated drained triaxial tests is conducted to simulate the soil behaviour after vacuum removal. Results show that the contribution of unloading in the minor principal stress direction outweighs the magnitude of elastic rebound after vacuum removal, and hence continued settlement dominates. A field case for highways is provided to further demonstrate the proposed mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geotextiles and Geomembranes - Volume 47, Issue 1, February 2019, Pages 12-22
Journal: Geotextiles and Geomembranes - Volume 47, Issue 1, February 2019, Pages 12-22
نویسندگان
Pengpeng Ni, Kai Xu, Guoxiong Mei, Yanlin Zhao,