Application of Double-load Box Self-balancing Method in Bearing Capacity Test of Super-long Pile Foundation
In the middle reaches of the Yellow River,the main stream of Shanxi Province,the underground is mainly composed of sand,silty clay and silty clay layers with low physical and mechanical indexes.In this complex geological condition,in order to ensure the bearing capacity of bridge pile foundation and the safety of superstructure meet the requirements,large-diameter and super-long piles are mainly used in design,which is difficult to construct and expensive.Double-load box self-balancing method refers to embedding two load boxes in a specific position of the pile in turn according to the test scheme,and then loading the load boxes step by step according to the loading test scheme to obtain the bearing capacity of the three sections of the pile respectively.The method can solve many problems in the test of super-long pile foundation,provide data support for the optimal design of pile length,and has a wide application prospect.
double load boxself-balancing methodextra-long pile foundation
NETL
NSTL
万方数据
