顶桩 meaning in English

pile jacking

This paper introduces the limit - destruction theory to study and analyze the function - mechanism of sand cushion in the collective function of the piles and the earth , and then brings forward the regulating - equation of the stress ratio between the up - pile - soil and the top of pile concerning the sand cushion . its final calculating result basically tallies with the practical function conditions . this provides an alternative approach to the study of sand cushion
4在复合地基桩、土共同作用中，垫层的作用和机理，本文引入极限破坏理论对砂垫层作用机理进行分析研究，提出砂垫层的桩顶桩土应力比协调方程，其计算结果与实际作用情况较吻合，为砂垫层研究提供了一种思路。