砂岩强度的估算研究及应用——以南水北调中线安阳段为例  

Study on and Application of Strength Assessment for Sandstone： In Anyang Section of Middle Line in South-to-North Water Diversion

作　　者：王杰[1,2] 林达明[1] 马凤山[1] 李克蓬[1,2] 

机构地区：[1]中国科学院工程地质力学重点实验室/地质与地球物理研究所,北京100029 [2]中国科学院研究生院,北京100049

出　　处：《吉林大学学报（地球科学版）》2013年第5期1549-1555,共7页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目（41030750,41172271）

摘　　要：为了获得合理的施工设计岩石强度参考值，以南水北调安阳段砂岩为例开展了3种岩石强度估算方法的研究：1）引进标准条件下风钎钻进时间作为指标来估算岩石的单轴抗压强度；2）收集已有成果给出利用波速估算岩石单轴抗压强度的公式；3）根据试验数据拟合出安阳地区点荷载强度与岩石单轴抗压强度间的经验关系式。通过上述方法得到了3种不同的岩石强度估算公式，并以AY33＋600为例，综合利用所得公式进行了砂岩强度估算，发现这3种方法吻合度很高，且与砂岩室内试验强度值间的误差为2％～9％。上述公式在安阳段的应用解决了原设计方案中围岩分级不准的问题。To get the reasonable rock strength for engineering design and construction, sandstone in Anyang Section of South-to-North Water Diversion Project was used to carry out three kinds of rock strength assessment methods study. 1）Air drilling time was taken as an indicator to estimate the rock uniaxial compressive strength; 2）Collected available formulas were used to get the relationship between elastic wave speed and the uniaxial compressive strength; 3）Experimental data were fitted to get the empirical relationship between the point loading index and the uniaxial compressive strength. Through the above methods, three formulas for rock strength assessment were obtained. Taking AY33q-600 as example, the sandstone rock strength was calculated. It was found that the three methods fitted each other well, and the error between assessment strengths and laboratory tests strength was 2 %- 9 %. The application of these methods in Anyang section solved the problem caused by poor rock classification in the original designs.

关 键 词：砂岩强度估算 声波 点荷载强度 风钎钻进时间 

分 类 号：P642.22[天文地球—工程地质学]