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《Industrial Construction》 2003-04
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UPLIFT TESTS AND CALCULATIONS OF UNDER-REAMED PILES

Liu Wenbai Zhou Jian(Department of Geotechnical Engineering,Tongji University Shanghai\ 200092) Mengke Temuer(Inner Monolia Electric Power Investigation Designing Institute\ Hohhote\ 010062)  
The field prototype tests have been carried out for under\|reamed piles bearing uplift loading in the loess of drought area.In these tests,uplift displacement and horizontal displacement of under\|reamed piles bearing uplift loading and horizontal loading,displacement of surface layer soil,relationship of loading and displacement were measured.The ultimate uplift bearing capacity,failure mechanism of piles were studied.It is very effective on improving ultimate uplift bearing capacity of pile to raise height of belled\|out section of under\|reamed piles.The failure mechanism of the pile is a gradual failure due to damage softening and reduction pressure softening of the soil.A theoretical model is proposed to calculate the ultimate uplift bearing capacity in the loess,and comparing the calculation results with the test data,both are basically similar,which shows to have chosen correct calculation pattern.
【Fund】: 国家自然科学基金资助项目 (批准号:5 99680 0 1);; 上海市重点学科项目资助
【CateGory Index】: TU473.1
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