济南地区粉质黏土层竖向渗透系数反演分析

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【摘    要】:为了研究济南地区粉质黏土层竖向渗透系数,以济南轨道交通3号线某基坑降水工程为例,通过际降水试验运行参数反演模拟地层渗透性参数,得出开挖范围内的主要土层粉质黏土层的渗透性参数,根据模拟反演计算得出,该区域的粉质黏土层的渗透性远大于勘察报告提供的参数。

【关键词】:粉质黏土;渗透系数;降水模拟;反演计算

【中图分类号】:U231.3 【文献标志码】:A 【文章编号】:1008-3197(2024)05-60-04

【DOI编码】:10.3969/j.issn.1008-3197.2024.05.016

Inversion Analysis of Vertical Permeability Coefficient of Silty Clay Layer

in Jinan Area

WANG Jing,NIU Lei,PAN Hu,LIU Yudong

(Shanghai ChangKai Geotechnical Engineering Co., Ltd, Shanghai 200093, China)

【Abstract】: In order to study the vertical permeability coefficient of the powdery clay layer in Jinan area, this paper relies on a foundation pit dewatering project of Jinan Rail Transit Line 3,uses precipitation test operation parameters to invert and simulate the permeability parameters of the geological strata, and obtains the permeability parameters of the main soil layer, the silty clay layer, within the excavation range. According to the simulation inversion calculation, the permeability of the silty clay layer in this area is much higher than the parameters provided in the survey report.

【Key words】: powdery clay;permeability coefficient;precipitation simulation;inversion calculation

黏性土在常规水文地质分析中,一般作为弱透水层或者隔水层,能够有效隔断上下含水层的水力联系,该层的透水性较差,富水性贫乏;而从大量基坑的降水施工经验看,在济南地区独特发育孔隙的黏性土地层透水性和富水性都有别于常规黏性土。(剩余3143字)

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