Using a gravel-sand mixture from channel bottoms as a building material for check dams allows use of readily available material and may also facilitate use of flood water.

Analysis of factors influenced the compaction effect of roadbed gravel pebble mixture;

12 kinds of lime-flyash-gravel mixture with 3 gradations and 4 margins were designed.

With the extensive use of the artificial sand and shotcrete in engineering,the application of the artificial mixed gravel sand in shotcrete have been emphasized by constructor.