苕溪古河道区域承压水含水层特性研究

Characteristics of confined water aquifer in Tiaoxi ancient channel area

杭州机场轨道快线是杭州第一条穿越城市中心区域的轨道快线,连接了杭州火车西站、杭州火车东站及萧山国际机场等杭州最主要的对外交通枢纽。本线西起余杭区的苕溪站,途经余杭区、西湖区、拱墅区、上城区、萧山区、钱塘区,东至钱塘区的永盛路站,线路全长约59.1 km,设车站15座,正线设计最高运行速度120 km/h,于2017年开始前期研究工作,2019年9月开工建设,2022年9月22日全线通车试运营。本文结合杭州机场轨道快线工程仓前车辆段至西溪湿地站—西文区间风井3区间的工程勘察经验,论述苕溪古河道承压水的赋存特征、补给排泄方式及动态变化特性,分析该区域承压水的水位变化规律,确定承压含水层的水文地质参数,预测承压水变化趋势,为杭州城西苕溪古河道地区类似工程的设计施工提供借鉴。

The Hangzhou Airport Rail Express is the first rail express in Hangzhou that traverses the central area of Hangzhou,connecting Hangzhou West Railway Station,Hangzhou East Railway Station,and Xiaoshan International Airport,and other prominent transportation hubs in Hangzhou.The line originates from Tiaoxi Station located in the western Yuhang District,passes through Yuhang District,Xihu District,Gongshu District,Shangcheng District,Xiaoshan District,Qiantang District,and terminates at Yongsheng Road Station in the eastern Qiantang District.The total length of the line is about 59.1 km,with 15 stations,and the maximum designed running speed of the main line is 120 km/h.The preliminary research work began in 2017,construction began in September 2019,and the entire line was opened for trial operation on September 22,2022.This work combines the findings of the engineering survey conducted from Cangqian Depot to Xixi Wetland Station and Xiwen Air Shaft 3 of the Hangzhou Airport Rail Express Project.It examines the occurrence characteristics,recharge and discharge methods,and dynamic change characteristics of confined water in the ancient Tiaoxi River.Additionally,it analyzes the water level change pattern within this area,determines the hydrogeological parameters of the confined aquifer,predicts the trend of confined water changes,and offers valuable references for the design and construction of similar projects in the ancient Tiaoxi River area located in the western part of Hangzhou.