碎石类土由硬块石、软块石、漂石、卵石土、砾石土和砂砾七种组织(表1),碎石土按填料工程性质可划分为A、B、C、D四个组别。在碎石类土填料中,做岩土试验都比较麻烦。由于填料通常都是就地取材,很少考虑其工程性质情况,如附近隧道出碴,山坡上挖出的石方。从一些运营铁路的填石路基状况来看,有些地段路基发生翻浆冒泥,路基大量下 Gravel soil is composed of seven kinds of organizations (Table 1), such as hard rock, soft rock, boulder, pebble soil, gravel soil and gravel. The gravel soil can be divided into four groups A, B, C and D do not. In the gravel soil packing, geotechnical tests are more troublesome. As the packing material is usually drawn locally, seldom consider the nature of its project, such as the ballast near the tunnel, dug stone on the hillside. From some operating railway rock filling roadbed conditions, some sections of the roadbed mud, muddy roadbed