摘要
运用黏着摩擦理论,分析结构面直剪过程中实际剪切面积的变化规律及其对剪切应力的影响,认为实际接触面积的最大点对应于结构面的剪切破坏状态,由此通过对试验过程的分析给出了剪切破坏的简易判别式,在此基础上提出抗剪强度选取的新方法。运用此方法对沪蓉西高速公路24标段岩体结构面的抗剪强度进行了选取,其选取结果与峰值强度折减后的结果比较接近,且该方法比峰值强度的折减系数选取更合理可靠。
The adhesion friction theory was applied to study the variation of shear area of structural plane and its influence on shear stress. The shearing failure of structural plane was considered to correspond to the maximum of real contact area. A criterion was given to distinguish the shearing failure of structural plane and a new selecting method of shear strength was brought forward subsequently. This method was applied in the direct shear tests on structural plane from the 24th section of Hurongxi Highway in Hubei Province to select the shear strength. The selected result was approximately the peak strength after multiplying a reduction factor, but the proposed method was more reasonable and more convenient than selecting a reduction factor for the peak strength.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2008年第9期1367-1371,共5页
Chinese Journal of Geotechnical Engineering
关键词
结构面
直剪试验
抗剪强度
黏着摩擦
structural plane
direct shear test
shear strength
adhesion friction
