桥头搭板的室外试验研究

Experimental study outdoor of bridge-head approach slabs

为真实得到搭板+无砂小桩综合处治方法下搭板的受力性能及对桥头病害的治愈效果,进行搭板室外原型静载试验研究。试验结果表明:搭板下满布无砂小桩的处理方案消除桥头跳车病害的效果更好,台后填土越高,这种削减作用越明显,对于软土地基效果更好。

Combining the actual projects, approach slabs are set in two different support ways. To get the difference of two treatments,prototype test outdoor was carried out. Test results prove that under the test load, vertical displacement of approach slabs beneath which the whole roadbed treated with non-sand mlni-piles is smaller than that of approach slabs beneath which only roadbed below sleep-beam is treated with non-sand mini-piles, which suggests that the effect of the former is better for eliminating the bump at bridge-head.