摘要
基坑降水方案设计中常用到的两个水文地质参数是渗透系数和影响半径。本文结合稳定流和非稳定流理论,对潜水完整单井抽水有一观测孔情况下渗透系数和影响半径的求解方法进行了分析和探索,指出了常规计算方法的不足之处,并给出了本文的求参方法。最后,利用西安北客站场地抽水试验资料对上述求参方法进行计算,并与两个观测孔的稳定流公式计算结果进行对比验证,从而证明了本文方法的合理性和经济实用性。
Permeability coefficient and radius of influence are both commonly used hydrogeological parameters during foundation pit dewatering design. Combining with the stable and unstable flow theory,indentifying method of these parameters were analyzed in this paper according to the pumping test at fully penetrating well of unconfined aquifer layer with one observation borehole,meanwhile,shortcomings of conventional methods were pointed out. At last,the aforementioned methods are verified based on filed pumping test data in Xi＇an North Railway Station,and the results obtained were compared with that of steady flow theory for two observation wells,which finally proved the rationality and practicability of the method proposed in this paper.
出处
《四川建筑科学研究》
2014年第6期106-109,共4页
Sichuan Building Science
基金
安徽省高校优秀青年人才基金项目(2012SQRL195)
关键词
潜水含水层
完整井
抽水试验
渗透系数
影响半径
unconfined aquifer layer
fully penetrating well
pumping test
permeability coefficient
radius of influence
