杂填土是一种含有建筑垃圾、工业废料、生活垃圾等杂物,填积在凹地、废河道等处形成的人工填土。它与老土相比成份复杂,质地疏松;与人工压实填土相比,难以摸清其分布规律。这种成份复杂又处在特殊状态的土,在古老或大城市的城区、郊区普遍存在,而且有相当的数量,是各种工程经常遇到的土层。 Miscellaneous fill is a kind of construction waste, industrial waste, garbage and other debris, filled in the concave, waste river formed at the artificial fill. Compared with the old soil, it has complicated composition and loose texture. Compared with artificial compaction, it is difficult to find its distribution law. This kind of complex and special soil, which is common in urban and suburban areas in ancient or metropolitan areas, has a considerable amount of soil and is often encountered in various projects.