水文地质工程地质2025，Vol.52Issue(3)：125-133,9.DOI:10.16030/j.cnki.issn.1000-3665.202406031
基于3D打印技术的软弱夹层干湿循环作用强度劣化试验研究
Strength degradation of soft interlayer under dry-wet cycles based on 3D printing technology
摘要
Abstract
Soft interlayers are critical geological formations that significantly impact the stability of slopes in water and hydropower engineering projects.This study investigated the shear mechanical characteristics and failure mechanism of the soft interlayer under dry-wet cycle conditions with a focus on the left bank shoulder slope of the Caizi Dam pumped storage power station's lower reservoir.Real rock morphology characteristics were replicated using 3D printing technology to create structural surfaces,and the roughness coefficient JRC of different structural surfaces was then calculated.Subsequently,shear tests were conducted on soft interlayers containing artificial joint surfaces subjected to dry-wet cycles.The results indicate that,after multiple dry-wet cycles,the shear strength decreases exponentially as the number of cycles increases,and eventually approaches a very low stable value,which is approximately 5％of the initial strength.Moreover,the shear strength is positively correlated with the roughness of the structural plane.The shear stress-strain curve of the soft interlayer exhibits a stepwise decrease during the failure stage,with the magnitude of this decrease in the residual curve proportional to structural surface roughness.Samples with higher roughness on the structural surface reach the residual strength stage at a shorter shear displacement,and the residual strength decreases as the number of dry-wet cycles increases.This study provides valuable insights for slope stability assessments in energy dissipation and water storage projects.关键词
软弱夹层/干湿循环/3D打印/强度劣化/粗糙度/残余强度Key words
soft interlayer/dry-wet cycle/3D printing/strength deterioration/roughness/residual strength分类
建筑与水利引用本文复制引用
刘浩,张文,芦磊..基于3D打印技术的软弱夹层干湿循环作用强度劣化试验研究[J].水文地质工程地质,2025,52(3):125-133,9.基金项目
国家自然科学基金项目(42293353) （42293353）
地质灾害防治与地质环境保护国家重点实验室自主课题(SKLGP2020Z008) （SKLGP2020Z008）
