济南富水孔隙黏性土地层渗透性试验研究
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Experimental study on permeability of porous soil with rich water in Ji’nan
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    摘要:

    以济南市轨道交通R1线大杨庄站主体基坑降水工程为例,研究表明发育于济南区域孔隙黏性土地层黏性土内具有独特的空间网状孔隙、孔洞结构。通过4种渗透性试验成果对比分析,室内试验、声纳渗流试验测定的渗透系数均较小,与实际地层渗透能力相差很大;抽水试验与回灌试验测定的渗透系数相近,远远大于一般黏性土的渗透性,渗透系数随着回灌压力的增加而呈线性提高,回灌引起周边地下水位上升较小,影响范围有限,符合济南孔隙黏性土地层的富水性强和渗透性好特性,具有独特性和鲜明的区域特点。相关试验成果可以为相关区域基坑降水与回灌设计、施工和泉水环境保护提供参考。

    Abstract:

    Taking the main foundation pit dewatering project of Dayangzhuang Station on Line R1 of Jinan Urban Rail Transit as an example, the research shows that the clay of porous clay stratum developed in Jinan region has unique spatial reticulated pore and pore structure. Comparing and analyzing the results of four permeability tests, the permeability coefficients measured by laboratory test and sonar seepage test are small, which differ greatly from the actual formation permeability; the permeability coefficients measured by pumping test and recharge test are close, far greater than that of common clay, and the permeability coefficients are presented with the increase of recharge pressure. Linearity improvement, recharge caused a small rise in the surrounding groundwater level, limited scope of influence, in line with Jinan pore viscous soil layer rich in water and good permeability characteristics, with unique and distinct regional characteristics. Relevant experimental results can provide reference for design, construction and spring water environmental protection of foundation pit dewatering and recharge in relevant areas.

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黄薛,曾纯品,雷炳霄,丁庆忠.2019.济南富水孔隙黏性土地层渗透性试验研究[J].地质学报,93(s1):87-92.
HUANG Xue, ZENG Chunpin, LEI Bingxiao, DING Qingzhong.2019. Experimental study on permeability of porous soil with rich water in Ji’nan[J]. Acta Geologica Sinica,93(s1):87-92.

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  • 在线发布日期: 2019-10-09