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STUDY ON ANTI-CONSOLIDATION AND REBOUND BEHAVIOR OF SOFT GROUND IMPROVED BY SURCHARGE PRELOADING AFTER UNLOADING
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Abstract Based on a series of basal hypothesis on soft soil，a basic anti-consolidation equation of saturated soft ground is deduced under the condition of unloading，and the corresponding analytical solution under the condition of single-level constant-speed unloading is obtained. Then the mechanism of rebound deformation is analyzed，and the calculation formula of rebound deformation is provided. Based on the case history，the generation and dissipation process of the negative excess pore water pressure in the anti-consolidation zone of the ground improved by surcharge preloading are studied，and the development law of rebound is obtained，which explains the phenomena of the small rebound magnitude and fast stabilization after unloading.
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Received: 11 November 2003
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WANG Zhengzhou1, 2, DENG Huafeng1, 2*, ZHOU Mengxia3, LI Jianlin1, 2, XIAO Yao1, 2, ZHU Wenxi1, 2, ZHOU Shuhuan 1, 2. Degradation mechanism and dynamic property evolution of pre-damaged rock under wetting-drying cycles#br#[J]. , 2026, 45(4): 1148-1161. |
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