摘要
海上圆筒施工并回填完成后,其筒壁结构隔离了内外水力联系,而内部排水桩体使得圆筒内外存在绕流及不同土层间的越流。复杂的渗流路径已超出了传统理论公式的边界条件假定。为了准确确定复杂绕流边界下的海上圆筒内含水层参数,在已完成回填的海上格形钢板桩圆筒内布置一组抽水试验井。采用岩土有限元分析软件Plaxis渗流模块,根据抽水试验场地实际边界条件建立二维模型,对含水层参数进行了拟合分析。通过拟合抽水试验抽水段与水位恢复段全过程的水位观测数据,提高了含水层参数计算的准确性。
After marine cylinder＇s construction and backfilling, the internal and external hydraulic connection is isolated by cylinder wall. While the flow around cylinder wall and cross flow among different soil layers are caused by drainage pile bodies inside the cylinder. The seepage path complex has exceeded the assumed boundary conditions of traditional theoretical formula. In order to calculate aquifer parameters accurately under the complex flow around marine cylinder, a group of pumping test wells was designed inside a constructed marine sheet pile cylinder. A simulation model was established according to the actual boundary condition of the pumping test by Plaxis flow model. The matching analysis on aquifer parameter was carried by estab- lishing 2D model according to the actual boundary condition of the pumping test. The model simulated the whole process in- eluding dewatering and water-level recovery, which was fit by field pumping test data, and improved the accuracy of acquiring aquifer parameters.
出处
《中国港湾建设》
2015年第6期26-28,共3页
China Harbour Engineering
