COMPARATIVE STUDY OF TREATMENT METHOD FOR BUMPING AT BRIDGE-HEAD ON SOFT SOIL ROADBED

The bumping at bridge-head on soft soil roadbed caused the problems of driving safety and degraded normal service of the road. Many treatment methods had been introduced briefly according to the major causes of the bumping at bridge-head. A comparative study had been accomplished between the methods such as vacuum preloading, arc approaching slab, multi-stage approaching slab and the combining method of vacuum preloading and arc approaching slab. All of the treatment effect were drew and the results showed that the combining method of vacuum preloading and the arc approaching slab was most effective to reduce the maximum settlement and the differential settlement.