单井与群井结合抽水试验在地面沉降实测中的应用研究

以天津市某工程项目抽水试验数据为实测基本资料,目的是确定地基土的渗透性和富水性,计算含水层的水文地质参数,并实时监测试验期间地面沉降监测结果。结果表明,单井和群井抽水试验在抽水过程中,地面高程呈现出下降的趋势,累计达到最大沉降量,达到23. 57 mm,随着抽水时间较短和抽水时间较长等原因,在地面具有附加荷载时,沉降变大。因此,试验实时监测可以有效预防存在问题,为工程的设计与施工提供安全的风险控制。

Application of single well and group well combined pumping test in ground settlement measurement

Taking the pumping test data of a project in Tianjin as the basic data,the purpose is to determine the permeability and water-richness of the foundation soil,calculate the hydrogeological parameters of the aquifer,and monitor the ground subsidence monitoring results during the test.The results show that in the pumping process of single well and group wells,the ground elevation shows a downward trend,reaching the maximum settlement amount,reaching 23.57 mm.With the short pumping time and long pumping time,it has When the load is added,the settlement becomes larger.Therefore,real-time monitoring of tests can effectively prevent problems and provide safe risk control for engineering design and construction.