Excess Pore Pressure Dissipation Characteristics of Different Soil by CPTU on Pearl River Delta

Abstract:

Through a lot of CPTU excess pore pressure dissipation tests on Pearl River Delta in China, excess pore pressure dissipation characteristics of different soil layer on Guangzhou-Zhuhai section of Beijing-Zhuhai Expressway and Taishan section of Guangdong West Coast Expressway has been analyzed. The dissipation time of 50% dissipation degree t₅₀ of excess pore pressure dissipation curve by CPTU can be used as the auxiliary method to determine the type of soil, and through CPTU excess pore pressure dissipation tests, the t₅₀ value of sand soil, silt, silty clay, clay soil and silt soil has been obtained; through comparison with the t₅₀ value of different soil, the difference of sand soil, silt and clay soil can be roughly distinguished; the obvious boundary value between the t₅₀ value of clay soil, silty clay and silt soil is not existed, so the t₅₀ value can not be direct to determine the type of these clay type of soil. The achieved results can provide a research foundation for CPTU application research on Pearl River Delta in China.

• Periodical: Applied Mechanics and Materials (Volumes 71-78)
• Pages: 4606-4609
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.71-78.4606
• Online since: July 2011
• Authors: Yan Chun Tang, Gao Tou Meng
• Keywords: CPTU, Dissipation Time of 50% Dissipation Degree, Excess Pore Pressure Dissipation, Pearl River Delta

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