| 基于可破碎颗粒的高填方碎石土地基强夯颗粒流数值分析 |
| |
| 引用本文： | 陈南,尚晓一,吴彪,余虔,熊勇林.基于可破碎颗粒的高填方碎石土地基强夯颗粒流数值分析[J].宁波大学学报(理工版),2022,0(4):58-64. |
| |
| 作者姓名： | 陈南 尚晓一 吴彪 余虔 熊勇林 |
| |
| 作者单位： | 1.宁波大学 冲击与安全工程教育部重点实验室, 浙江 宁波 315211; 2.宁波大学 土木与环境工程学院, 浙江 宁波 315211; 3.大连国际机场集团有限公司, 辽宁 大连 116033; 4.民航机场规划设计研究总院有限公司, 北京 100101 |
| |
| 基金项目： | 宁波大学冲击与安全工程教育部重点实验室开放基金（CJ-20180110）； |
| |
| 摘 要： | 依托某碎石土地基强夯工程, 通过PFC2D建立模拟碎石土地基在单点多次夯击作用下碎石颗粒破碎的过程. 结果表明: 相比于不考虑颗粒破碎, 考虑颗粒破碎情况下造成的强夯沉降更大, 模拟效果更好. 强夯过程中, 初始阶段主要是夯坑底部碎石颗粒发生破碎, 随着夯击次数增多, 颗粒破碎带逐渐向夯坑两侧发展, 破碎的碎石颗粒的广度和深度一定程度上与夯击能大小成正相关. 夯坑底部主要由破碎的块石颗粒与土颗粒嵌合形成壳状结构起到加固作用.
|
| 关 键 词： | 碎石土 颗粒破碎 离散元 强夯 |
Numerical analysis of dynamic compaction particle flow of high fill gravel foundation based on broken particles |
| |
| CHEN Nan,' target="_blank" rel="external">,SHANG Xiaoyi,WU Biao,YU Qian,XIONG Yonglin,' target="_blank" rel="external">.Numerical analysis of dynamic compaction particle flow of high fill gravel foundation based on broken particles[J].Journal of Ningbo University(Natural Science and Engineering Edition),2022,0(4):58-64. |
| |
| Authors: | CHEN Nan " target="_blank">' target="_blank" rel="external"> SHANG Xiaoyi WU Biao YU Qian XIONG Yonglin " target="_blank">' target="_blank" rel="external"> |
| |
| Institution: | 1.Key Laboratory of Impact and Safety Engineering of Ministry of Education, Ningbo University, Ningbo 315211, China; 2.School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China; 3.Dalian International Airport Group Co., Ltd., Dalian 116033, China; 4.China Airport Planning & Design Institute Co., Ltd., Beijing 100101, China |
| |
| Abstract: | Based on a dynamic compaction project of gravel soil foundation, the crushing process of gravel particles under single point and multiple tamping is simulated by PFC2D. The results show that the dynamic compaction settlement caused by considering particle breakage is larger than that without considering particle breakage, and the simulation effect is better. In the dynamic compaction process, the initial broken gravel particles are mainly concentrated at the bottom of the tamping pit. With the increase of tamping times, the particle crushing zone gradually develops to both sides of the tamping pit. The breadth and depth of broken gravel particles are positively correlated with the tamping energy to some extent. The bottom of the rammed pit is mainly composed of broken stone particles and soil particles to form a shell structure to reinforce. |
| |
| Keywords: | gravel soil particle breakage discrete element dynamic compaction |
|
| 点击此处可从《宁波大学学报(理工版)》浏览原始摘要信息 |
| 点击此处可从《宁波大学学报(理工版)》下载免费的PDF全文 |
|
