The article introduces in more detail the CBR index of roadbed stuffing for expressway and its experimental application, studies the CBR index experiment and puts forward the several problems for attention in the experiment.

Discuss on moisture control of roadbed filler;

The application of roadbed filler in double line engineering of Wuxiang;

The following paper illustrates the importance of rational selecting roadbed fillings,introduces the meaning and functions of earth base compaction,analyzes the main factors influenced roadbed compaction,and discusses the method to control fill pavement and compaction,in order to make the compaction degree of filled roadbed achieve the code requirement and ensure the stability of roadbed.

This paper compares and analyzes on the engineering properties of three kinds of roadbed fillings in the Eastern Test Section of Qinshen Line,and through filling test,expounds the applicability of several fillings.

In this paper,the study results for sampling tests of subgrade filling and foundation soil in permafrost region along Qinghai-Tibet railway are introduced,the variety of subgrade filling and foundation soil is revealed.