【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3.67×10-4cm/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。更多还原

【Abstract】 The Qiantang Baihu Project 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 3.67×10-4cm/s.The max penetration coefficient of the gravel and sand was 0.0424cm/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 strata.With the ramming test,the penetration of the soil layer after compaction was reduced obviously and the soil layer could be a good lake bottom.更多还原