濟(jì)南地區(qū)粉質(zhì)黏土層豎向滲透系數(shù)反演分析
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【摘 要】:為了研究濟(jì)南地區(qū)粉質(zhì)黏土層豎向滲透系數(shù),以濟(jì)南軌道交通3號線某基坑降水工程為例,通過際降水試驗(yàn)運(yùn)行參數(shù)反演模擬地層滲透性參數(shù),得出開挖范圍內(nèi)的主要土層粉質(zhì)黏土層的滲透性參數(shù),根據(jù)模擬反演計(jì)算得出,該區(qū)域的粉質(zhì)黏土層的滲透性遠(yuǎn)大于勘察報(bào)告提供的參數(shù)。
【關(guān)鍵詞】:粉質(zhì)黏土;滲透系數(shù);降水模擬;反演計(jì)算
【中圖分類號】:U231.3 【文獻(xiàn)標(biāo)志碼】:A 【文章編號】:1008-3197(2024)05-60-04
【DOI編碼】: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
黏性土在常規(guī)水文地質(zhì)分析中,一般作為弱透水層或者隔水層,能夠有效隔斷上下含水層的水力聯(lián)系,該層的透水性較差,富水性貧乏;而從大量基坑的降水施工經(jīng)驗(yàn)看,在濟(jì)南地區(qū)獨(dú)特發(fā)育孔隙的黏性土地層透水性和富水性都有別于常規(guī)黏性土。(剩余3143字)