王瑞,郭聚坤,尹斌,雷胜友,魏道凯.钙质砂颗粒形状及破碎特性试验研究[J].海洋工程,2022,40(5):158~166
钙质砂颗粒形状及破碎特性试验研究
Experimental study on shape and breakage behavior of calcareous sand particles
投稿时间:2021-10-03  
DOI:10.16483/j.issn.1005-9865.2022.05.017
中文关键词:  钙质砂  颗粒形状  破碎特性  单颗粒强度  分形维数  破碎能量  深海资源  南海
英文关键词:calcareous sand  particle shape  particle breakage  single particle strength  fractal dimension  breakage energy  deep-sea resources  South China Sea
基金项目:山东省自然科学基金青年项目(ZR2020QE257);西藏自治区科技计划项目(XZ202001ZY0013G);西藏自治区自然科学基金项目(XZ202001ZR0058G);山东省交通运输科技项目(2020B23)
作者单位E-mail
王瑞 长安大学 公路学院, 陕西 西安 710064  
郭聚坤 长安大学 公路学院, 陕西 西安 710064
山东交通职业学院 公路与建筑系, 山东 潍坊 261206 
gjk_1986@126.com 
尹斌 山东交通职业学院 公路与建筑系, 山东 潍坊 261206  
雷胜友 长安大学 公路学院, 陕西 西安 710064  
魏道凯 山东交通职业学院 公路与建筑系, 山东 潍坊 261206
日喀则市交通运输局工程项目管理中心, 西藏 日喀则 857021 
 
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中文摘要:
      单颗粒强度及形状是影响钙质砂强度、变形和破碎的重要因素。以0.5~1.0 mm和1.0~2.0 mm粒径范围的钙质砂颗粒为研究对象,开展了颗粒形状及尺寸分类统计和单颗粒破碎试验,研究了力—位移关系、单颗粒强度—平均粒径关系和单颗粒破碎能量。结果表明:块状颗粒是钙质砂的主要形状颗粒,粒径较大颗粒的形状不规则程度较高。块状颗粒的破碎过程根据力—位移关系曲线中第一次颗粒破碎力、颗粒破碎峰值力和颗粒完全破碎力出现位置的不同分成5种情况,以颗粒发生多次破碎为特征的情况Ⅰ和情况Ⅱ出现次数最多,其余情况仅在0.5~1.0 mm粒径范围的颗粒中出现。单颗粒强度随平均粒径的增大而减小,1.0~2.0 mm和0.5~1.0 mm粒径范围的单颗粒强度分形维数分别为2.95和1.53,粒径较大的钙质砂颗粒更容易破碎。提出了钙质砂单颗粒破碎能量的简化计算公式,1.0~2.0 mm粒径范围的单颗粒破碎能量较0.5~1.0 mm的更大。
英文摘要:
      The strength and shape of a single particle are important factors affecting the strength, deformation and breakage of calcareous sand. Taking calcareous sand particles with particle size ranging from 0.5 to 1.0 mm and 1.0 to 2.0 mm as the research object, particle shape and size classification statistics calculation and single particle crushing test were carried out. The relationship between force and displacement, the relationship between single particle strength and average particle size, and the crushing energy of single particle were studied. The results show that the massive is the main shape of calcareous sand particles, and the irregular degree of particle shape with a larger particle size is higher. The breakage process of massive particles is divided into five cases according to the different positions of the first particle breakage force, the peak particle breakage force and the complete particle breakage force in the relationship curve between force and displacement. Cases I and Ⅱ characterized by multiple particle breakage occur the most times, and the rest occur only in particles with particle size ranging from 0.5 to 1.0 mm. The single particle strength decreases with the increase of average particle size. The fractal dimensions of single particle strength ranging from 1.0 to 2.0 mm and 0.5 to 1.0 mm are 2.95 and 1.53 respectively. Calcareous sand particles with a larger particle size are easier to break. A simplified formula for calculating the breakage energy of a single particle of calcareous sand is proposed. The breakage energy of a single particle ranging from 1.0 to 2.0 mm is greater than that ranging from 0.5 to 1.0 mm.
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