Consolidation behavior of soft deposits considering the variation of prefabricated vertical drain discharge capacity |
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| Institution: | 1. Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China;2. School of Mechanics and Civil Engineering, China University of Mining & Technology, Xuzhou 221008, China;3. Research Center of Coast and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;1. Department of Civil Engineering, Tianjin University, Tianjin 300354, China;2. Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration, Tianjin University, Tianjin 300350, China;3. Key Laboratory of Coast Civil Structure Safety of the Ministry of Education, Tianjin University, Tianjin 300354, China;1. Institute of Lowland and Marine Research, Saga University, Honjo machi 1, Saga 840-8502, Japan;2. Asian Institute of Technology, Pathumthani 12120, Thailand;3. Can Tho University, Can Tho, Viet Nam;1. Emeritus Professor and Project Consultant, Asian Institute of Technology, Bangkok, Thailand;2. Soil Engineering Research Center Director, Department of Civil Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, Thailand;3. Construction Innovations and Future Infrastructures Research Center, Department of Civil Engineering, Faculty of Engineering, King Mongkut''s University of Technology Thonburi, Bangkok 10140, Thailand;4. Centre of Excellence in Geotechnical and Geoenvironmental Engineering, Department of Civil Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;5. Thai Obayashi Co. Ltd., Bangkok, Thailand;6. Ceteau (Thailand) Co. Ltd., Bangkok, Thailand;7. Ground Improvement Designer, Ceteau BV, Makkum, the Netherlands;1. Department of Civil Engineering, Industrial University of Ho Chi Minh City, Ho Chi Minh City 700000, Viet Nam;2. Department of Civil Engineering, Ho Chi Minh City University of Technology, Vietnam National University, HCM City, Ho Chi Minh City 700000, Viet Nam;3. Department of Ocean Engineering, Pukyong National University, Busan 608-737, Republic of Korea |
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| Abstract: | This paper is primarily focused on why and how to consider the varied discharge capacity during simulations of consolidation via prefabricated vertical drains (PVDs) for soft soil deposits. First, the existing studies regarding discharge capacity are summarized and discussed. These studies conclude that the discharge capacity of PVDs at sites vary with the confining pressure and consolidation time. Next, a series of analytical solutions that consider the variation of discharge capacity with ground depth, consolidation time or both simultaneously are presented and compared. Applications of these solutions and of the newly introduced parameters are described. Then, a well-documented case history on ground treatment with PVDs is analyzed, in which the parameters related to the time-dependent discharge capacity were obtained from laboratory tests. A comparison between a classical solution and the newly presented method indicates that consideration of the varied discharge capacity in the consolidation theory can better predict the consolidation process of PVD-improved ground. |
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| Keywords: | Soft soil Consolidation Prefabricated vertical drain Discharge capacity |
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