Research on Force Characteristics of Pile Foundation Bearing Platforms Based on Tension and Compression Rod Model Theory
To study the analysis mode of the tension and compression rod model of multi-pile foundation caps under direct load,the traditional tension and compression rod model takes into account the influence of flash ratio on resistance.This paper first intro-duces the theoretical methods and calculation formulas of two kinds of tensile and compression bar models(MBT-1/MBT-2)and then designs the punching test based on the punching analysis of concrete blocks.The punching test of four groups of 24 specimens is carried out,and the recorded value of the punching test load is compared with the theoretical formula value proposed by Gutierrez R and the improved formula.The results show that there is a certain error range between the original model formula of tension and com-pression bar proposed by Gutierrez R and the test value,and the improved model formula of tension and compression bar has a good match with the test value.The punching formula of a rock-socketed end cap pile is proposed based on the model of tension and com-pression rod,and the parameters characterizing the failure of a rock-socketed end cap pile are adjusted.The aim is to present a simple design scheme of rock-socketed end piles,which can be extended to more complex rock-socketed end piles.
tension and compression rod modelcuttingpile foundationtheoretical formula
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