Experimental Research on Cone Penetration Resistance
Experimental Research on Cone Penetration Resistance
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DOI：
10.1061/9780784413289.007
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
R. Salgado
中科院分区：
文献类型：
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作者：
R. Salgado
土壤中的静力触探是一个复杂的过程。复杂性部分来自边界值问题本身，其中具有圆锥形尖端的比重计以恒定速率向下推动通过在水平方向上无限延伸但具有自由水平表面的（可能是异质的）土体，部分来自土壤的性质，具有强烈非线性机械响应的颗粒材料。由于使用静力触探作为表征土壤场地的一种手段的价值，将静力触探阻力与土壤的基本性质联系起来的问题在研究中受到相当大的关注。本文探讨了从实验力学对理解这个问题的贡献。试验研究主要包括现场试验、室内试验和土工离心机试验。实验工作使用半室和离心机与半锥穿透土壤样品旁边的有机玻璃墙与同时收集的图像在渗透期间允许使用数字图像相关（DIC）的方法来了解周围的位移场穿透锥。总的来说，这些技术已经产生了一个知识体系，通常可以有效地解释桑迪和粘性土中的圆锥贯入试验。
Cone penetration in soil is a complex process. The complexity arises partly from the boundary-value problem itself, in which a penetrometer with a conical tip is pushed down at constant rate through a (likely heterogeneous) soil mass of infinite extent in the horizontal direction but with a free horizontal surface, partly from the nature of the soil, a particulate material with strongly non- linear mechanical response. Because of the value of using cone penetration as a means of characterizing a soil site, the problem of linking the cone penetration re- sistance to fundamental properties of the soil has received considerable attention in research. This paper examines contributions towards understanding of this problem from experimental mechanics. Experimental research has included most- ly field tests and tests in test chambers and geotechnical centrifuges. Experimental work using half chambers and centrifuges with half cones penetrating a soil sam- ple next to a Plexiglass wall with simultaneous collection of images during pene- tration has allowed use of digital image correlation (DIC) methods to understand the displacement field around a penetrating cone. Collectively, these techniques have generated a body of knowledge that generally allows effective interpretation of cone penetration tests both in sandy and clayey soils.