VISION CONE PENETROMETER FOR DIRECT SUBSURFACE SOIL OBSERVATION. TECHNICAL NOTE
VISION CONE PENETROMETER FOR DIRECT SUBSURFACE SOIL OBSERVATION. TECHNICAL NOTE
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用于直接观测地下土壤的 VISION 锥入度计。
DOI：
10.1061/(asce)1090-0241(1997)123:11(1074
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发表时间：
1997
影响因子：
3.9
通讯作者：
R. D. Hryciw
中科院分区：
文献类型：
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作者：
Scott A. Raschke;R. D. Hryciw
静力锥贯入试验（CPT）已被广泛接受的岩土工程场地表征和测量力学土壤性质的原位。然而，与标准贯入试验不同，CPT中不获取土样。因此，土壤类型只能通过与CPT测深数据的经验相关性或通过检索测试位置附近的现场样本来估计。本技术说明介绍了一种新型视锥位移计（VisCPT），当VisCPT以CPT标准推进速率20 mm/s推入地面时，可真实的观察和记录地下图像。VisCPT内的高放大率和低放大率微型电荷耦合器件相机系统提供的图像视野分别为2.3和18 mm（对角测量）。现场视频记录系统允许每个摄像机的视频序列以真实的时间记录在两个超级VHS格式视频记录器上。现场采集的图像的例子。
The cone penetration test (CPT) has gained wide acceptance for geotechnical site characterization and measurement of mechanical soil properties in situ. However, unlike the standard penetration test, soil specimens are not obtained in the CPT. Therefore, the soil type can only be estimated through empirical correlations with CPT sounding data or by retrieving field specimens adjacent to the test location. This technical note describes a new vision cone penetrometer (VisCPT), which permits observation and recording of subsurface images in real time as the VisCPT is pushed into the ground at the CPT standard advance rate of 20 mm/s. A high- and low-magnification miniature charge-coupled device camera system housed within the VisCPT provides images with fields of view of 2.3 and 18 mm, respectively (measured diagonally). A field video recording system allows the video sequence from each camera to be recorded in real time on two super VHS format video recorders. Examples of images acquired in situ are presented.