Pulverized coal ash is hydraulically filled on ground of Zishan. Its grains were fine as silty sand.

紫山灰场粉煤灰作为一种冲填土，粒度细，似粉砂。

Because of the high dry density the dynamical strength of silty sand is higher than those of ordinary sands.

试验得到粉砂的动强度高于一般砂性土，主要是因为制样控制干密度比较大。

This technology is significant to improve oil production from unconsolidated silty sand stone reservoir and to the field applications.

粉细砂岩油藏防砂工艺技术对于提高疏松砂岩粉细砂油藏产能及现场应用有重要的指导意义。

The finer layers generally consist of carbonaceous clay, mild clay and silty sand, showing characteristics of lacustrine sedimentation.

细粒层均为含炭的粘土、亚粘土和粉砂，具湖塘相沉积的特点。

In this paper, the case studies of two tall buildings built on silty sand improved by vibro - replacement stone column in Hangzhou are reported.

本文介绍杭州两座高层建筑物采用振冲碎石桩加固粉砂土地基的工程实例。