桩基竖向抗压承载力设计

Design of vertical bearing capacity of pile foundation

桩基竖向承载力设计时,欠固结土层的侧阻力在试桩环节以相反方向存在,考虑桩混凝土腐蚀裕量,实现工程桩与试验桩能达到近似同水平的应力状态,都需要合理确定试验桩竖向静载荷试验加载值。桩身承载力起控制作用的桩基设计,应根据桩承载力设计表达式合理确定设计用的单桩承载力特征值和试桩加载值。

In view of design of the vertical bearing capacity of the pile foundation,the lateral resistance of the under-consolidated soil layer exists in the opposite direction in the pile test. Considering the corrosion allowance of the pile concrete,the engineering pile and the test pile can reach the same level of stress state,and the vertical static load test loading value of the test pile are to be determined reasonably. The pile foundation design with the control of the pile body capacity should be based on the design expression of the pile bearing capacity to reasonably determine the characteristic value of the single pile bearing capacity and the test pile loading value.