Bench-Scale Testing of Grouts for Geo-Slice Peels

Bench-Scale Testing of Grouts for Geo-Slice Peels
复制标题

地质切片剥离灌浆的实验室规模测试

DOI:
10.1061/9780784483428.033
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发表时间:
2021
期刊:
Proc. International Foundations Congress and Equipment Exposition (IFCEE 2021
影响因子:
--
通讯作者:
Yost, K.M.
Yost, K.M.
中科院分区:
--
文献类型:
--
作者:
Yost, K.M.

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地质切片是日本开发的一种新的原位取样技术,用于识别不利于挖沟的土壤沉积物中的古地震活动证据。为了保存和增强地质切片样品的地层特征,通过在切片上铺设加固布和灌浆或粘合剂,从土壤剖面的垂直切片产生“剥离”。粘合剂干燥后,将布从切片上取下。薄薄的一层土壤仍然附着在布上,形成果皮。然后,可以检查果皮的古液化特征,如堤坝和砂床,通常没有层理结构。以前的地质切片研究使用了一种剧毒的日本水泥浆。为了符合现代环境法规,有必要确定一种危险性较低的灌浆,但仍能产生令人满意的剥离。进行了用于产生地质切片剥离的多种粘合剂的实验室规模研究。评价粘合剂在产生增强土壤切片的垫层结构的浮雕方面的功效以及其他性能,例如灵活性和危害水平。在本文评估的11种粘合剂中,柔性密封液体被鉴定为最适合于产生地质切片剥离。
Geo-slicing is a novel in situ sampling technique developed in Japan to identify evidence of paleoseismicity in soil deposits not conducive to trenching. To preserve and enhance the stratigraphic features of the geo-slice sample, a “peel” is created from the vertical slice of the soil profile by laying a reinforcing cloth and a grout or adhesive over the slice. After the adhesive dries, the cloth is removed from the slice. A thin layer of soil remains attached to the cloth, creating the peel. The peel can then be examined for paleoliquefaction features such as dikes and sills of sand that are generally devoid of bedding structures. Previous geo-slicing studies used a highly toxic Japanese grout. To conform to modern environmental regulations, it is necessary to identify a less-hazardous grout that still produces a satisfactory peel. A bench-scale study of multiple adhesives for creating geo-slice peels was performed. Adhesives are evaluated for their efficacy in creating a relief that enhances the bedding structures of the soil slice and for other properties such as flexibility and hazard level. Of the eleven adhesives evaluated herein, flex seal liquid was identified as most suitable for creating geo-slice peels.
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