影响疏浚珊瑚礁岩抗剪强度的关键因素
发布时间：2019-06-12 08:06
【摘要】：依据疏浚工程珊瑚礁岩的物理力学试验资料,应用珊瑚礁沉积原理和结构特征理论知识,将疏浚珊瑚礁岩分为3类:管状珊瑚礁岩、蜂窝状珊瑚礁岩和致密状珊瑚礁岩。从珊瑚礁岩的特性角度出发,分析了礁岩类别、颗粒成分和破坏应变率对抗剪强度的影响及规律。结果表明:1)粘聚力c和内摩擦角φ均具有无填充管状珊瑚礁填充珊瑚砂粒蜂窝状珊瑚礁填充钙质胶结方解石致密状珊瑚礁的特点。2)内摩擦角φ值与粒径大于5 mm的含量值相关性最好,回归系数为0.862。3)c和φ值随轴向应变的增加而迅速增加,抗剪强度达到峰值,所需应变率为0.018%~0.082%,都为脆性破坏,呈现剪切、劈裂和沿裂隙破坏3种形式。
[Abstract]:Based on the physical and mechanical test data of coral reef rocks in dredging engineering, the dredged coral reef rocks are divided into three types: tubular coral reef rock, honeycomb coral reef rock and dense coral reef rock by using the principle of coral reef deposition and the theoretical knowledge of structural characteristics. From the point of view of the characteristics of coral reef rocks, the effects and laws of reef types, particle composition and failure strain rate on shear strength are analyzed. The results show that: 1) both cohesion c and internal friction angle 蠁 have the characteristics of unfilled tubular coral reefs filled with coral sand and honeycomb coral reefs filled with calcareous calcite dense coral reefs. 2) the internal friction angle 蠁 has the best correlation with the content of particle size larger than 5 mm. The regression coefficient is 0.862.3) c and 蠁 increase rapidly with the increase of axial strain, and the shear strength reaches the peak. The required strain rate is 0.018% 鈮，
本文编号：2497861
[Abstract]:Based on the physical and mechanical test data of coral reef rocks in dredging engineering, the dredged coral reef rocks are divided into three types: tubular coral reef rock, honeycomb coral reef rock and dense coral reef rock by using the principle of coral reef deposition and the theoretical knowledge of structural characteristics. From the point of view of the characteristics of coral reef rocks, the effects and laws of reef types, particle composition and failure strain rate on shear strength are analyzed. The results show that: 1) both cohesion c and internal friction angle 蠁 have the characteristics of unfilled tubular coral reefs filled with coral sand and honeycomb coral reefs filled with calcareous calcite dense coral reefs. 2) the internal friction angle 蠁 has the best correlation with the content of particle size larger than 5 mm. The regression coefficient is 0.862.3) c and 蠁 increase rapidly with the increase of axial strain, and the shear strength reaches the peak. The required strain rate is 0.018% 鈮，
本文编号：2497861
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