浙江龙游牛场古地下洞室群1号洞顶板长期抗拉强度估算  

Estimation of Long-Term Tensile Strength of Roof in No.1 Cave of Niuchang Ancient Underground Caverns,Longyou,Zhejiang Province

作　　者：郭改梅[1] 杨志法[1] 陶波[2] 高丙丽[3] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中国石油大学资源与信息学院,北京102249 [3]西安科技大学建筑与土木工程学院,西安710054

出　　处：《吉林大学学报（地球科学版）》2007年第4期783-788,共6页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40272112)

摘　　要：根据牛场古地下洞室群1号洞顶板的拉裂现象,利用Ansys建立与牛场古地下洞室群初始及边界条件相符的模型,通过FLAC-3D计算获得拉裂缝所在单元垂直裂缝方向的拉应力范围,即0.037～0.469 MPa。由于顶板拉裂缝是经过长期变形而产生的,结合材料力学第一强度理论,该范围可以作为牛场古地下洞室群1号洞顶板围岩的长期抗拉强度。The authors present a new method to estimate long-term tensile strength according to tensile cracks on roof of No. 1 cave in Niuchang ancient underground caverns. Firstly, a model based on true initial and boundary conditions of Niuchang ancient underground caverns is established by Ansys, and then the range of tensile stress in cracked elements and perpendicular to cracks is obtained by FLAC -3D calculation, as 0. 037-0. 469 MPa. Because cracks in the roof occur after long time stress, and according to theory of strength I of material mechanics, such range can he regarded as roof long-term tensile strength in No. 1 cave of Niuchang ancient underground caverns.

关 键 词：牛场古地下洞室群 长期抗拉强度 数值模拟 

分 类 号：P642.2[天文地球—工程地质学]