river gravel

Destructive tests on piping failure of sandy gravel layer of river dikes

江河大堤堤基砂砾石层管涌破坏危害性试验研究

The sediment size changes sharply in two reaches of the middle and lower Yangtze River. Sediment type changes from gravel into sand in one zone, and another from sand into mud.

长江中下游河床沉积物在两个河段出现了粒径的急剧变化和沉积物类型的转换，一个是从砾石转变为砂，另一个是从砂转变为泥。

The Jiangbei conglomerate is a kind of supergene cemented rock in the river gravel.

江北砾岩是河流砾石层在地表经胶结形成的沉积岩,长期以来地学界对其成因未有定论.

By the control of the cement, sand-gravel aggregate, reinforcing steel, loamy soil and the means of experiment in the use of the repairing project of the culvert passing Zhang River spoiled by devastating flood, it has been completed auspiciously.

通过对穿漳涵洞水毁修复工程所用水泥、砂砾石骨料、钢筋、壤土等材料以及试验手段的控制，保证了该项工程的顺利完成。

The sand and gravel in the Yangtze river is good building and filling materials.

摘要长江中下游干流河道内的砂石是较好的建筑和填筑材料.