大滩口水库坝前淤泥面加坝技术初探.doc.doc

大滩口水库坝前淤泥面加坝技术初探
马志坚
(宁夏固原市水利勘测设计院,宁夏固原 756000)
摘要:以大滩口水库坝前淤泥面上利用加坝自重形成堆载,对水库淤积层进行预压固结为例,针对库区淤积物这类饱和软土具有高压缩性、高灵敏度、高流变性和低强度、低渗透系数的工程特性,借助堆载预压地基处理计算理论,进行坝前淤泥面上加固设计,探求加固机理,制定加荷计划,为类似工程设计及安全施工起到了重要的指导作用。
关键词:坝前淤泥;加坝;预压设计;加荷计划
中图分类号: 文献标识码:A 文章编号:1672—1144(2009)01—0071—03
Research on Technology of Increasing Dam Height on
Sludge before Dam of Datankou Reservoir
MA Zhi-jian
(Ningxia Guyuan City Investigation and Design Institute of Water Conservancy,Guyuan,Ningxia 756000,China)
Abstract:Taking the preloading consolidate on the sludge before the dam Datankou Reservoir by using the self-weight of increasing the dam height to form piled load for example,and aiming at the engineering characteristics of the saturated soft soil in reservoir area such as the pression,high sensitivity,high-rheologic behavior and low strength,low permeability,etc. the reinforcement design on the surface of sludge before dam is made by using the theoretical caculations for the piled-load preloading and subgrade treatment,so as to research on the reinforcing mechanism and loading plan,which may provide important guidance for the design and construction of other similar project.
Keywords:sludge before dam;increasing dam height;preloading design;loading plan
引言
建国以来,宁夏回族自治区共修建200多座中小型水库,宁夏南部山区占86%,水库的建设,对有效利用当地水资源,兴利除害,解决人畜饮水,改善群众的生产生活条件和生态环境,促进当地农业生产和经济发展,维护民族团结和地区的社会稳定,发挥了巨大的作用,其作用是无可替代的。但由于