This paper mainly introduces the experience of success in reinforcing deep road graben slope by joint methods such as building protecting slope with pulp and stone pieces, supporting seeping grooves, jetting concrete to anchor, forming protection wall, etc.

Bases on the location of these drains and the design objective,it analyzes the effectiveness of application,and gives evaluation on the role of drains and slope revetment drains in the protection of Laoyemiao-Jining Expressway and the drainage.

This article analyzes the difference of the traditional leaching layer blind drain and the geotextiles blind drain, introduces the geotextiles applyin g on the drainage under highway and the designing principle of the soil sustaini ng, filter, preventing-block of the geotextiles, approves the applying effects of the geotextiles on the blind drain by the measuring data of the drainage faci lity.