宁波轨道交通水文地质参数试验及工程应用
PDF下载 (347)吴天寿 1,叶俊能 2.宁波轨道交通水文地质参数试验及工程应用[J].宁波大学学报(理工版),2013,26(03):127-132.DOI:
WU Tian-shou 1,YE Jun-neng 2.Engineering Applications and Test of Hydrogeological Parameters in Ningbo Rail Transit[J].Journal of Ningbo University(Natural Science & Engineering Edition),2013,26(03):127-132.DOI:
| Title: | Engineering Applications and Test of Hydrogeological Parameters in Ningbo Rail Transit |
| 作者: | 吴天寿 1, 叶俊能 2 |
| Author(s): | WU Tian-shou 1, YE Jun-neng 2 |
| 关键词: | 轨道交通; 水文地质参数; 基坑突涌 |
| Keywords: | urban rail traffic; hydrogeological parameters; foundation pit pouring |
| 分类号: | U452.1 |
| 文献标识码: | A |
| 摘要: | 根据宁波市区地下水含水层介质、水动力特征及其赋存条件, 划分了宁波轨道交通沿线地层的含水层. 采用单孔抽水试验、多孔抽水试验和注水试验, 对承压水含水层的水文地质参数进行试验, 获得各地层的渗透系数. 以某车站基坑工程为例, 利用水文地质参数, 采用考虑土体强度和不考虑土体强度方法, 判定基坑突涌稳定性. 结果表明: 不考虑土体强度的抗力分项系数取值偏保守, 采用考虑土体强度以后, 抗力分项系数增幅显著增大. 据此提出基坑开挖到22.5m时开始启动降水, 并尽可能减少降水时间, 以减小对周边环境的影响. |
| Abstract: | The aquifer layers along the rail are devided according to the groundwater aquifers, hydrodynamic characteristics and occurrence conditions in ground water of Ningbo city. Using the single-well pumping test, water injection test in porous pumping experiments and, the experiment of hydro-geological parameter in confined water are carried out, and the permeability coefficient for all layers is obtained. Then, a station pit is taken for sampling, and by considering soil body strength and not doing so, the bursting Chung stability of found pit is calculated. The results indicate that using the method of not considering soil body strength makes the anti-force points coefficient more conservative, and the coefficient increases largely in case of considering soil body strength. Furthermore, we suggest that when the foundation pit is excavated to 22.5m, precipitation should begin, and precipitation time should be reduced as short as possible to reduce environmental cost. |
| 参考文献 /References: | [1] 林宗元. 岩土工程试验监测手册[M]. 北京: 中国建筑工业出版社, 2005. [2] 张祯武, 李兴成, 徐光祥. 利用定压力非稳定流压水试验求水文地质参数[J]. 岩石力学与工程学报, 2004, 3(15):2543-2546. [3] 黄勇, 周志芳, 王锦国. 基于抽水试验的水文地质参数三维进化反演[J]. 河海大学学报: 自然科学版, 2002, 30(6):26-29. [4] 丁春林. 软土地区承压水基坑突涌稳定计算法研究综述[J]. 地下空间与工程学报, 2007, 3(2):333-337. [5] 谭松林. 考虑土体强度的建筑基坑突涌问题分析[J]. 中国地质大学学报, 2002, 27(2):209-212. [6] 何运晏, 张志林, 夏孟. 辐射井技术在北京地铁五号线降水中的应用[J]. 水文地质工程地质, 2006, 1:80-83. |
| 备注/Memo: | 收稿日期: 2012?12?13. 基金项目: 宁波市重大科技攻关项目（2009C50004）.第一作者: 吴天寿（1962－）, 男, 安徽芜湖人, 高级工程师, 主要研究方向: 道路与桥梁工程. E-mail: wts1962@163.com 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
