以液态水泥粉煤灰混合料填筑桥涵台背来消除桥头跳车病害是一种新工艺、新方法。液态水泥粉煤灰具有轻质性、强度高、流动性好、施工简便、浆体硬化后直立性好等特点。这种混合料用于台背回填时自身的压缩及沉降量都非常小,强度比一般回填材料大得多,因为自身荷载小,减小了对地基的附加应力,降低了地基的竖向变形,可以有效的消除桥头跳车的问题;并且该技术也解决了粉煤灰存放带来的环境污染,社会效益、经济效益非常显著。 It is a new technique and new method to fill bridge and back of platform with liquid cement fly ash mixture to eliminate bridgehead jumping disease. Liquid cement fly ash has the characteristics of light weight, high strength, good fluidity, easy construction and good erection after the slurry is hardened. This kind of mixture used in bench backfill itself is very small compression and settlement, the strength is much larger than the average backfill material, because of its small load, reducing the additional stress on the foundation, reducing the vertical deformation of the foundation , Which can effectively eliminate the problem of jumping at the bridgehead. The technology also solves the environmental pollution caused by the storage of fly ash, and has great social and economic benefits.