铁道标准设计2024，Vol.68Issue(8)：108-114,144,8.DOI:10.13238/j.issn.1004-2954.202211110002
隧道洞渣点荷载与饱和抗压强度相关性研究现状分析
Analysis of the Current Situation of the Research on the Correlation Between Tunnel Muck Point Load and Saturated Compressive Strength
摘要
Abstract
Saturated compressive strength is a key indicator to evaluate whether tunnel muck can be used to prepare manufactured aggregates.However,the existing testing methods for saturated compressive strength present problems such as complex sample preparation requirements,strict testing procedures,and long pretreatment time.The characteristics of tunnel muck such as irregular shape,different block sizes,and large changes in water content,make it unable to meet the requirement for rapid evaluation of mechanical property,which hinders the manufactured aggregate application process of tunnel muck.Therefore,it is urgent to carry out research on the rapid evaluation method of saturated compressive strength of tunnel muck.The performance characteristics of tunnel muck and the stipulations of different industries on the saturated compressive strength index of manufactured aggregate parent rock are analyzed.The correlation between saturated compressive strength of tunnel muck and its point load strength index is discussed from the standard level and research level.The feasibility of evaluating saturated compressive strength of tunnel muck based on point load strength index is demonstrated.By summing up the factors of the point load evaluation method,it is found that lithology,moisture content,specimen size and strength have significant impact on the prediction effect of point load.In practical engineering applications,it is necessary to focus on reducing the evaluation error rate.The conditions applicable to point load rapid test are given,that is,the thickness should be controlled at 35～60 mm,the width should be controlled at 40～60 mm,and the longest side should be controlled at 35～60 mm.Thus,the stability of the point load evaluation method is improved,which provides technical support for the green application of tunnel muck used for manufactured aggregate.关键词
隧道洞渣/点荷载/饱和抗压强度/岩性/含水状态/试件尺寸Key words
tunnel muck/point load/saturated compressive strength/lithology/moisture content/specimen size分类
交通工程引用本文复制引用
谢京谕,李化建,王振,黄法礼,易忠来..隧道洞渣点荷载与饱和抗压强度相关性研究现状分析[J].铁道标准设计,2024,68(8):108-114,144,8.基金项目
中国国家铁路集团有限公司科技研究开发计划课题(J2022Z505) （J2022Z505）
中国铁道科学研究院集团有限公司院基金项目(2020YJ049) （2020YJ049）
