桥墩承载力及端、侧阻力变化的实验研究

Exprimental study on pier’s bearing capacity,tip resistance and lateral resistance

桥墩的承载能力分两个部分:端部阻力和侧阻力。通过模拟实验,测出桥墩端阻力,并间接求出侧阻力。通过分析二者随纵向载荷变化而变化的规律,得出了桥墩承载力随其埋深变化的规律:桥墩端阻力随纵向荷载的增加而增加,而侧阻力增加到一定值就不再增加。并找出“临界埋深”,结论为桥墩的设计中最大限度地发挥端、侧阻力提供了依据。

The bearing capacity of the pier is divided into two parts: tip resistance and lateral resistance. Through simulated experiment, with tensile-pressing sensor the tip resistance of the pier is measured, and we can get the lateral resistance indirectly. By analysing the varying laws of tip resistance and lateral resistance with the longitudinal load, we get the conclusion :the tip resistance of the pier increases as the longitudinal load does, but the lateral resistance doesn't increase continuously when it runs up to a certain stage. And we also obtain 'critical burying depth', the conclusion gives the grounds on which to make the best of the tip resistance and lateral resistance of the pier in the design of pier.