动力排水固结法在大面积深厚淤泥软基加固处理中的应用

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Abstract Based on silt ground treatment project of Taishan petrifaction storage area of Nansha，Guangzhou，the basic principle，design parameters and construction technology of dynamic drainage consolidation method(DDCM) for improving the mud ground with high water content and large void ratio are discussed. By using field test methods，the pore water pressure，the soil pressure and the layered settlement are measured；the standard penetration test，vane shear test，static cone penetration test and the load experiment have been used to monitor and test the construction process and consolidation effect. According to the experimental data，the laws of pore water pressure，soil pressure and settlement of soft soils under dynamic loading are analyzed. The test results show the correlation among the variation in vertical settlement，soil pressure and excess pore water pressure is significant. With the dissipation of pore water pressure，the shear strength of soil improves and the post-construction settlement reduces，and the soils reach over-consolidated state. The research results reveal that it is obvious to treatment the large area of deep and thick silt foundation with the new construction technology of “static-dynamic combination，the tamping is light first and then becomes larger with energy adds gradually，fewer time and more cycles，consolidation by layer”；combining mesh drainage system which is composed of the horizontal drainage body，the plastic vertical drainage board and micro-fracture system of soils，the physico-mechanical properties are improved obviously，and physico-mechanical properties are better than expected. DDCM has extensive perspectives for soft ground improvement engineering.

Key words： soil mechanics dynamic drainage consolidation method(DDCM) soft ground treatment monitoring and testing construction technology pore water pressure

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	LIU Yongjian
	LI Zhangming
	ZHANG Lijuan

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LIU Yongjian,LI Zhangming,ZHANG Lijuan. APPLICATION OF DYNAMIC DRAINAGE CONSOLIDATION METHOD TO REINFORCEMENT AND TREATMENT OF DEEP AND THICK SILT FOUNDATION OF LARGE AREA[J]. , 2010, 29(S2): 4000-4007.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4000

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