应用管涵处治桥路过渡段差异沉降研究

Differential Settlement of Bridge Transition Section with Culvert

目的改善桥头跳车现象,增加行车的舒适性及安全性,延长桥梁使用寿命.方法拟定常规回填土处治方案和2种预埋不同管涵的改善处治方案,应用数值分析的方法,对比分析3种处治方案的桥路过渡段沉降变化,路面坡度,管涵的受力及变形.结果桥路交界处阶形高差由常规方案的8.88 cm经过2种改善方案预埋管涵处治,分别变为0.41 cm,2.99 cm,桥路过渡段工后坡度最大为1.97%,处治效果良好.钢管应力最大值为168 MPa,管涵竖向变形最大,相对变形为0.4%,满足工程承载力及变形要求.结论在桥路过渡段回填区内预埋管涵,方案可行,桥头跳车现象处置效果良好.

Improving bumping phenomenon at bridge head is of great significance to driving comfort and safety and prolonging the service life of bridges.The conventional backfill treatment scheme and two improvement treatment schemes of different pre-buried culverts are drawn up.Their settlement changes of bridge-road transition section,the gradient of road surface,the stress and deformation of culverts and pipes are compared and analyzed by numerical analysis method.After pre-buried pipe culvert treatment,the step height difference at the junction of bridge road changed from 8.88 cm of the conventional scheme to 0.41 cm and 2.99 cm of the two improvement schemes,respectively.The maximum slope of bridge-road transition section after construction was 1.97%.The treatment effect was good.The maximum stress of steel pipe is 168 MPa,and the maximum vertical deformation of culvert is 0.4%,which meets the requirements of engineering bearing capacity and deformation.In the backfill area of bridge-road transition section,the pre-buried pipe culvert is feasible and the treatment effect is good.