TAILIEUCHUNG - Experimental application of optimal depth of PVDs determination under vacuum loading condition
In this paper, a method how to determine the optimal depth of PVDs under vacuum loading condition for soft ground improvement is presented and applied to specific case in 861 provincial street, Ward Cai Be, Tien Giang District. The soft soil includes two layers with total 12m thick and is allowed to drain on the top and bottom faces (double drainage). The result shows that the optimal depth of PVDs is about 10,5m with the small error of 0,7%. | SCIENCE & TECHNOLOGY DEVELOPMENT, Vol 19, 2016 Experimental application of optimal depth of PVDs determination under vacuum loading condition Vo Dai Nhat Lam Hoang Quoc Viet Pham Minh Tuan Faculty of Geology and Petroleum Engineering, Ho Chi Minh city University of Technology, VNU-HCMC (Manuscript Received on August 10th, 2015; Manuscript Revised on October 15th, 2015) ABSTRACT Viet Nam is one of the country that has a very soft and complicated geological feature. Therefore, how to economize cost but satisfy the standard and technical requirements in designing by selecting an appropriate method in building especially projects constructed on soft ground is always needed to consider and research continuouslly. In this paper, a method how to determine the optimal depth of PVDs under vacuum loading condition for soft ground improvement is presented and applied to specific case in 861 provincial street, Ward Cai Be, Tien Giang District. The soft soil includes two layers with total 12m thick and is allowed to drain on the top and bottom faces (double drainage). The result shows that the optimal depth of PVDs is about 10,5m with the small error of 0,7% Keywords: optimal depth, PVDs, vacuum loading 1. INTRODUCTION In the 30 recent years, method used PVDs has been developing due to its prominent advantages [3-9]. In case of big and important projects such as highway, plant, port or airport, PVDs are combined with vacuum loading in soft ground improvement. Many researches have been implemented to study on soft ground improvement by using vacuum loading [3,4,6,9]. In Viet Nam, many highway projects have been invested and constructed to solve traffic problem as well as for the development of the Trang 116 country such as Ho Chi Minh – Trung Luong, East – West, Long Thanh – Dau Giay, Ben Luc – Long Thanh, Cao Lanh – Vam Cong and so on. These projects spend a lot of money especially in improving soft soil problem. Therefore, the problem needed to consider .
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