Layered filling method for light combined roadbed of abrupt slope section

The invention discloses a layered filling method for a light combined roadbed of an abrupt slope section. The layered filling method comprises the steps that construction of a protection wall concretefoundation is completed on a foundation pit; an anti-sliding anchoring part is inserted into the abrupt slope section; a first protection wall single layer is constructed on the protection wall concrete foundation, a first foam light soil single layer is poured between the abrupt slope section and the first protection wall single layer to form a first filling roadbed, a middle geogrid is paved onthe surface of the first filling roadbed, and the steps are repeated until a top filling roadbed is formed; a top layer geogrid is laid on the surface of the top layer filling roadbed to form the light combined roadbed; and an HDPE impermeable geomembrane is laid on the top geogrid. In the embodiment of the invention, the layered filling method has the advantages of simple structure, conveniencein construction and high ov