On account of the extreme difficulty in artificial backfilling ground treatment with the vulnearability to cause quality failures,this paper elaborates on the performances of backfilling materials,such as slag,steel slag and earth,the backfilling methods and controlling key points,and formaulates a series of quality cantrol measures for artifical backfilling ground base.

A technique consisting of aquatic plants,artificial fillers and immobilized nitrogen cycling bacteria(INCB)was adopted in situ purifying contaminated Xinyi River in fall and winter seasons.

Based on the analysis on the loading specialities of a ground during manual cut and replacement, the paper proposes the new suggestions on the calculation formulas of the distribution of the stresses.