兰州新区千塘百湖二号滨湖区工程地质特性研究 .pdfVIP

学兔兔 煤 炭 工 程 2012年第2期 兰州新区千塘百湖二号滨湖区 工程地质特性研究 买振军，余彦平 (兰州煤矿设计研究院，甘肃兰州 730000) 摘 要：兰州新区千塘百湖项目是城市湿地公园重点建设项目之一，通过现场钻探、探井以 及室内和现场试验发现拟建的二号滨湖区底部地质条件较差，从上至下分布有粉土、砾砂、粉质 粘土及砂岩。粉土和砾砂层渗透性非常高，粉土渗透系数最大为3．67×10～cm／s，砾砂渗透系 数最大为0．0424cm／s。为防止人工湖内水的渗漏，采取全湖防渗措施。为了改善该湖底地层条 件，拟对该地层进行碾压夯实处理，通过击实试验，碾压后地层土的渗透性明显降低，可以作为 良好的湖底。 关键词：人工湖防渗；地质特性；渗透系数 中图分类号：TV543 文献标识码：B 文章编号：1671—0959(2012)02-0038-03 Study on Engineering Geological Features of Qiantang Baihu No．2 Binhu Block in New District of Lanzhou MAI Zhen—jun，YU Yan—ping (Lanzhou Design and Research Institute of Coal Mine，Lanzhou 730000，China) Abstract：The Qiantang Baihu Projeet in New District of Lanzhou is an urban wet land park，one of the key construction projects．The site drilling exploration，exploration well as well as the indoor and site experiments showed that the underground geological conditions of the proposed No．2 Binhu Block were poor．The materials distributed from top to bottom were fine soil，gravel and sand，fine clay and sandstone．The penetration of the fine soil layer and the gravel and sand layer was very high and the max penetration coefficient of the fine soil was 3．67×10～cm／s．The max penetration coefficient of the gravel and sand was 0．0424em／s．In order to prevent the water leakage of the artificial lake，the water leakage prevention measures were conduced for the full lake．In order to improve the underground strata conditions below the lake bottom，a roller compaction and tamping treatment would be proposed on the s