摘要
软硬互层岩体作为一种特殊层状岩体,各向异性特性显著。为降低研究天然层状岩体试验结果的离散特性,文章提出软、硬岩模拟材料同时浇筑形成互层类岩石材料的方法,基于该方法制备软硬互层类岩石并开展巴西劈裂试验,研究了层理方向对软硬互层类岩石材料的劈裂强度与破坏模式的影响。试验结果表明,软硬互层类岩石试样抗拉强度随层理倾角增大而逐渐减小;随层理倾角增大,劈裂破坏形式从穿层拉裂破坏转变为复合破坏,最终为沿层理拉裂破坏模式;其强度变化和破坏模式与天然层状岩石的巴西劈裂力学特性一致,证明了采用本文提出的制备互层类岩石材料方法研究层状岩体的可行性,对软硬互层类岩石材料及相关试验研究具有参考价值。
Hard and soft interbedded rock bodies are a type of special layered rock body with remarkable anisotropic characteristics.To reduce the discrete characteristics of natural layered rock body test results,this paper proposes a method of simultaneously casting soft and hard rock simulation materials to form interlayered rock materials.Based on this method,soft and hard interlayered rocks are prepared.Brazilian splitting tests are carried out to study the influence of lamina direction on the splitting strength and damage mode of soft and hard interlayered rock materials.Test results show that the tensile strength of soft and hard interlayered rock samples decreases as laminar inclination increases.As inclination increases,splitting damage changes from through-layer pulling damage to composite damage and finally to pulling damage along the laminae.The strength change and damage mode are consistent with the Brazilian splitting mechanical properties of natural layered rock.This proves that the method of preparing interlayered rock materials is feasible for studying layered rock bodies and is also suitable for soft and hard interlayered rock materials.This study demonstrates the feasibility of using the interlayered rock material preparation method to study layered rocks,providing a valuable reference for soft and hard interlayered rock materials and related experimental research.
作者
张力予
卓莉
古青松
郑蔚治
曹佳楸
ZHANG Liyu;ZHUO Li;GU Qingsong;ZHENG Weizhi;CAO Jiaqiu(State Key Laboratory of Hydraulics and Mountain River Development and Protection,College of Water Resources and Hydropower,Sichuan University,Chengdu 610065,China)
出处
《四川建材》
2025年第12期107-111,共5页
Sichuan Building Materials
关键词
巴西劈裂
软硬互层类岩石
人工制备
抗拉强度
破坏模式
Brazilian split
soft and hard interbedded rocks
artificial preparation
tensile strength
damage mode
