The resistance offered by the soil to the cutting edge of a caisson and soil flow around the cutting edge will vary continuously during sinking. In this study, a series of 1g model tests have been carried out to investigate the load–penetration response and the soil flow mechanism in sand around the cutting edge of a circular open caisson. Full- and half-open caisson tests have been conducted considering different tapered angles of the cutting edge. The load–penetration response is investigated using the full-open caisson tests with different (a) tapered angles of the cutting edge, (b) types of penetration and (c) depths of sinking. The soil flow mechanism is investigated using the half-open caisson tests with different (a) tapered angles of the cutting edge, (b) magnitudes of penetration and (c) depths of sinking. The soil flow mechanism is evaluated using image-based deformation measurement techniques. The results of the study presented in the form of load–penetration response and soil flow mechanism are useful in addressing the interaction between the cutting edge of the caisson and soil during the sinking operation.

中文翻译：

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圆形开式沉箱的试验研究

土壤对沉箱刃口的阻力和刃口周围的土流在下沉过程中会不断变化。在这项研究中，已经进行了一系列 1 g模型试验，以研究圆形开式沉箱切割边缘周围沙地中的荷载-渗透响应和土壤流动机制。考虑到切削刃的不同锥角，进行了全开和半开沉箱试验。使用不同的（ a）切削刃锥角、（b）穿透类型和（c）下沉深度的全开沉箱试验来研究载荷-穿透响应。采用半开沉箱试验研究了不同（a ) 切削刃的锥角，( b ) 穿透量和 ( c ) 下沉深度。使用基于图像的变形测量​​技术评估土壤流动机制。以荷载穿透响应和土壤流动机制的形式呈现的研究结果有助于解决沉井操作过程中沉箱切削刃与土壤之间的相互作用。