兰州新区千塘百湖二号滨湖区工程地质特性研究

 为加快推进兰州新区建设，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。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。本文对该处的地层进行了工程地质调查、地层的抽水、注水实验，为二号滨湖区底部的处理提出了经济合理的施工方案。

Study on Engineering Geological Features of Qiantang Baihu No.2 Binhu Block in New District of Lanzhou

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.