城市地铁工程建设对地下水环境的影响分析——以西安地铁Ⅱ号线为例

Influence of Urban Subway Construction on the Groundwater Environment——A Case Study on LineⅡof Xi'an Subway

地下工程在拓宽城市空间和缓解地面压力方面无疑具有积极作用,但对城市地下水环境产生的负效应同样不可忽视。本文在分析地下工程的影响后,以西安地铁Ⅱ号线为实例,利用经验公式与数值模拟的方法定量计算了地下工程施工期的降水量以.及对地下水流场的影响作用,结果表明:施工期间的降水以及营运期对地下水流场会产生一定的影响,即无论是抬升区还是下降区潜水位变幅在0～1.7m。并提出了针对性的防护措施。

Underground engineering plays undoubtedly a positive role in developing city space and releasing the pressure on the surface, however, the negative effects on the groundwater environment could not be neglected. After the analysis on the impact of underground engineering, taking the line II of Xian subway as an example, the water discharge of underground engineering and the effect on the groundwater flow are analyzed by using empirical formulas and numerical simulation method. The results indicate that the groundwater flow field would be influenced by the water discharge in construction and operation periods, and the groundwater level would change between 0～1.7 m in ascending zone or descending zone. The specific protective measures are presented for the project.