兰州新区千塘百湖二号滨湖区工程地质特性研究
|
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。
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.
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.
引文
[1]SL55-2005,中小型水利水电工程地质勘察规范[S].
[2]SL-2007,水利水电工程注水试验规程[S].
[3]袁道阳,杨斌,周俊喜,等.兰州秦王川盆地形成和演化特征的初步研究[J].西北地震学报,2000,(03).
[4]王文科,孔金玲,王钊,等.关中盆地秦岭山前地下水库调蓄功能模拟研究[J].水文地质工程地质,2002,(4):7～11.
[5]王爱民,牛慧县,张旺锋,等.兰州市引大秦王川灌区综合开发总体规划及系列子规划[M].兰州:兰州大学出版社,1996.
[6]GB 50025-2004,湿陷性黄土地区建筑规范[S].
[7]JGJ79-2002,建筑地基处理技术规范[S].
[2]SL-2007,水利水电工程注水试验规程[S].
[3]袁道阳,杨斌,周俊喜,等.兰州秦王川盆地形成和演化特征的初步研究[J].西北地震学报,2000,(03).
[4]王文科,孔金玲,王钊,等.关中盆地秦岭山前地下水库调蓄功能模拟研究[J].水文地质工程地质,2002,(4):7～11.
[5]王爱民,牛慧县,张旺锋,等.兰州市引大秦王川灌区综合开发总体规划及系列子规划[M].兰州:兰州大学出版社,1996.
[6]GB 50025-2004,湿陷性黄土地区建筑规范[S].
[7]JGJ79-2002,建筑地基处理技术规范[S].
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心