Study On The Constructional Technology Of Rock-embedded Under-reamed Uplift Piles

With the development of municipal engineering and lots of underground Structures and constructions being built up,resisting the uplift loading has been a usual problem in engineering design and constructian. The under-reamed uplift piles are applied widely.In South China,the rock-embedded under-reamed uplift Piles are applied widely more. it is difficult to find a suitable pile-end depth according to technical code for building pile foundations.Under-reamed uplift piles are constructed by rotary rig in different weathered sandstone and mudstone in South China.Rock-embedded under-reamed uplift piles are instrumented with strain gauges to measure the axial load distribution at all load increments.This paper has given research on the eharaeteristics of bearing capacity and deformation properties of the up lift pile which is based on the existing related research results. The construction technology of Rock-embedded under-reamed uplift piles is analyzed and studied. And through engineering examples practice Rock-embedded under-reamed uplift piles construction technology; resistance Combining with the static load resistance to pull the experimental further verified technical feasibility, in hopes of enlarged end resistance tension piles for design and construction of south china has certain guidance and reference.