岩土工程学报2025，Vol.47Issue(10)：2076-2085,10.DOI:10.11779/CJGE20240742
滑坡堰塞体材料空间变异性研究的试验方法
Test method for studying spatial variability of landslide dam materials
摘要
Abstract
Landslide dams exhibit typical spatial variation characteristics,with disordered composition,significant particle sorting,and complex spatial structures,making them prone to dam-break flood disasters under the scouring action of water flow.How to quantitatively investigate the spatial distribution characteristics of parameters such as void ratio and gradation of landslide dams is a fundamental problem that urgently needs to be addressed.In physical model tests,Structure-from-Motion(SfM),a three-dimensional reverse reconstruction technology,is introduced,and the discrete block sampling method is simultaneously integrated.A comprehensive methodology is proposed for landslide dams,encompassing orderly discrete block design,image acquisition,and quantitative analysis of the material spatial variation characteristic field.Subsequently,experimental validation and application are conducted based on this methodology.The test results reveal that both particle size distribution and void ratio exhibit significant variability in three-dimensional space for landslide dam materials.The proposed methodology obtains data on the distribution of void ratio and gradation compositions,endowing landslide materials with spatial distribution information properties.This lays a data foundation and provides a methodological approach for quantifying the accumulation form and spatial variability of wide-graded landslide dams.关键词
滑坡堰塞体/堆积结构特征/图像重构/空间变异/离散分块取样Key words
landslide dam/depositional characteristics/image reconstruction/spatial variability/discrete block sampling分类
建筑与水利引用本文复制引用
郭万里,蔡正银,简富献..滑坡堰塞体材料空间变异性研究的试验方法[J].岩土工程学报,2025,47(10):2076-2085,10.基金项目
国家自然科学基金-长江水科学研究联合基金项目(U2040221) （U2040221）
南京水利科学研究院中央级公益性科研院所基本科研业务费专项资金项目(Y324001)This work was supported by the National Natural Science Foundation of China(Grant No.U2040221)and the Fund on Basic Scientific Research Project of Nonprofit Central Research Institutions(Grant No.Y321001). （Y324001）
