| 雄安至北京大兴国际机场快线起步区地下段结构抗浮设防水位取值研究 |
| 投稿时间：2023-08-14 修订日期：2023-09-27 点此下载全文 |
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| 中文摘要:抗浮设防水位直接影响到地下结构的安全与建设费用,在地下结构建设中至关重要,因此,科学合理的确定地下结构的抗浮设防水位具有巨大的社会意义和经济价值。本文以“雄安新区至北京国际大兴国际机场快线地下工程段”为研究对象,系统分析了研究区水文地质条件以及地下水位年内年际动态变化规律,利用数值模拟法和类比预测法确定了地下结构抗浮设防水位标高建议值。结果表明,该场地区域浅层地下水水位埋深一般为5.0~20.0 m,地下水水位标高一般为-10.0~1.0 m。近五年场地浅层地下水水位标高一般在-5~-10 m,埋深一般在3.0~15.0 m,地下水位逐年升高,回升速率约1.0 m/a。地下结构抗浮设防水位标高取值建议取使用期抗浮设防水位采用数值模拟法预测结果。该成果服务了“雄安新区至北京大兴国际机场快线(R1线)”项目场地抗浮设计,为雄安新区重大工程建设项目的抗浮安全设计提供了示范。 |
| 中文关键词:雄安新区 水文地质条件 数值模拟 类比预测 抗浮设防水位 |
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| Study on the values of anti-floating fortification water level for the underground structure in Starting Area of Xiongan-Beijing Daxing International Airport Express Line |
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| Abstract:The anti-floating water level directly affects the safety and construction cost of underground structure, which is very important in the construction of underground structures. Therefore, it is of great social significance and economic value to scientifically and reasonably determine the anti-floating water level of underground structures. Taking “the underground structure of Express Railway Line from Xiongan New Area to Beijing Daxing International Airport” as the research object, the hydrogeological conditions and the interannual dynamic variation of groundwater level are systematically analyzed in the study area, and the numerical simulation method and analog forecasting method are used to determine the recommended value of the anti-floating water level elevation of the underground structure in this paper. The results show that the depth of shallow groundwater level in this site is generally 5~20m, and the elevation of groundwater level is generally -10~1 m. In recent five years, the elevation of shallow groundwater level in the site is generally -5~ -10m, and the buried depth is generally 3~15m. The groundwater level is increasing year by year, and the recovery rate is about 1m/a. The numerical simulation method is used to predict the recommended value of the anti-floating water level of the underground structure during its service life. The results serve the anti-floating design of the “Express Line from Xiongan New Area to Beijing Daxing International Airport (Line R1)” project site, and provide a demonstration for the anti-floating safety design of major engineering construction projects in Xiongan New Area. |
| keywords:Xiongan New Area Hydrogeological conditions Numerical simulation Analog prediction Anti-floating fortification water level |
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