6.7 Materials of cofferdam body

6.7.1 The filling materials for earth-rockfill cofferdam shallconform to the following provisions.(1) The permeability coefficient of impervious earth material shouldnot be larger than 1×10-4 cm/s. The local weathered material orgravel soil utilized in co ......（本文共 956 字 ）     [閱讀本文] >>