富水粉细砂地层内地铁深基坑降水及沉降研究

Study on the pit base precipitation and stratum subsidence of the deep foundation pit in the fine sand layer

采用简化计算、数值分析、现场实测相结合的方法,以宁和城际中和村站深基坑工程降水设计为例,根据其降水时间和坑内水量,计算了基坑降水所需的降水井数量和坑外地面沉降值,通过三维模拟得出了坑外水位的变化和地面沉降值,并结合现场实测数据验证了计算和模拟结果。

Applying simplified computation,numerical analysis and field survey method,taking deep foundation engineering dewatering engineering of Ninghe intercity Zhonghe village station as an example,according to dewatering time and water amount,the paper calculates dewatering well numbers and ground subsidence value. Through tri-dimensional simulation,it obtains water level and ground subsidence value. And combining with field survey data,it finally testifies the computing and simulating results.