沈阳地铁抗浮设防水位及影响因素合理性分析研究

Reasonability Analysis and Research on Anti Floating Water Level and Influencing Factors of Shenyang Metro

为提高沈阳地铁4号线地铁车站结构底板的抗浮水平及降低安全隐患,基于研究沈阳地铁4号线沿线地区地质勘察资料以及历史记录的地下水位情况,分析了地铁地下水位影响因素,得到了地下潜水水位与降水量的关系,通过年内动态曲线比拟法、多年动态曲线比拟法、水量均衡法抗,并以在岩土工程勘察期间测量的地下水位以及在此期间的地下水位最高最小值为依据,对抗浮水位埋深的合理性进行了分析,得到浮水位下的埋藏深度,研究结果表明:地下潜水水位增加范围和年降水量表现出较好的正相关联系,并且伴随着年降水量的升高,潜水位升高程度显著加大;富水年份内地下含水层水位埋深相对于枯水年的水位埋深显著偏小;抗浮设防水位埋深1.77—2.49m是合理的,为建筑物结构底板的抗浮问题提供合理有力的理论及数据依据。

In order to improve the anti floating level of the structural bottom plate of the subway station on Shenyang Metro Line 4 and reduce safety hazards,we analyzed the influencing factors of subway groundwater level.Meanwhile,the relationship between groundwater level and precipitation was obtained based on research on geological survey data and historical records of groundwater level in the areas along Shenyang Metro Line 4.The relationship between groundwater level and precipitation was analyzed through annual dynamic curve comparison method,multi-year dynamic curve comparison method,and water balance method.Based on the groundwater level measured during the geotechnical investigation and the maximum and minimum values of groundwater level during this period,the rationality of the buried depth of the anti floating water level was analyzed,and the buried depth under the floating water level was obtained.The water level burial depth of the underground aquifer in the year of abundant water was significantly lower than that in the year of low water.The buried depth of 1.77—2.49m for anti floating design was reasonable,which provided a reasonable and powerful theoretical and data basis for the anti floating problem of building structural bottom plates.