针对土地资源日益紧张的现状,为使疏浚泥堆场临时征地尽快复垦利用,结合南水北调东线工程3个疏浚泥堆场进行现场踏勘调查、原位测试及室内试验。结果表明:河道疏浚方式、疏浚泥的土性及疏浚完成时间是影响堆场工程性状的主要因素;绞吸式疏浚施工的水力分选作用十分显著,堆场高程和强度随着与吹泥口距离的增大而逐渐降低;疏浚土的黏粒质量分数越高,透水性越差,在自然条件下越难固结;加强堆场表面水的排除可尽快形成表层硬壳层,有利于堆场的复垦利用。
In order to reclaim the dredged soil stockyards as soon as possible, in-site tests as well as field and experimental investigations on three reclaimed yards on the Eastern Route of the South-to-North Water Diversion Project are reported in this paper, due to the deficiency of land resources. The results show that: the methods of river dredging, soil features of dredged soil, and completion time are three important factors that influence the engineering properties of the stockyards; the hydraulic sorting effect of cutter suction construction is significant, and the elevation and strength of the stockyards decrease gradually with the distance to the location of filling-mouth; dredged soil with higher clay particle content has lower permeability and has more difficulties in consolidating under natural conditions; and surface drainage leads to the rapid fornlation of a stiff shell layer, and is also beneficial to the reclamation use of the stockyards.