英语翻译One of the most critical steps in any limit equilibrium analysis is the determination or the estimation of the shear strength parameters (c and φ) for the surface along which it is anticipated that sliding will take place.In the case of

英语翻译One of the most critical steps in any limit equilibrium analysis is the determination or the estimation of the shear strength parameters (c and φ) for the surface along which it is anticipated that sliding will take place.In the case of
英语翻译
One of the most critical steps in any limit equilibrium analysis is the determination or the estimation of the shear strength parameters (c and φ) for the surface along which it is anticipated that sliding will take place.In the case of this slope on Sau Mau Ping Road,no information on shear strength was available at the time of the initial studies and so estimates had to be made on the basis of published information for similar rocks.
Hoek and Bray (1974) published a plot,reproduced in Figure 7.8,of cohesive strengths and friction angles for rocks and soils,based upon the results of published Estimates of shear strength back analysis of slope failures.Superimposed on this plot is an elliptical zone which
encompasses the estimated range of shear strength for sheet joints in unweathered granite.In choosing this range it was considered that the friction angle φ probably ranges from 30° for very smooth planar surfaces to 45° for rough or partly cemented surfaces.The cohesive strength c is more difficult to estimate and the range of 0.05 to
0.2 MPa was chosen on the basis of the results of back-analyses of slope failures,plotted in Figure 7.8.
Figure 7.8:Relationship between friction angles and cohesive strengths mobilised at failure of slopes in various materials.The plotted points were obtained from published information from the back analysis of slope failures.(After Hoek and Bray 1974).
Some readers may be surprised that a cohesive strength has been assumed for joint surfaces which obviously have no tensile strength or ‘stickiness’ as would be found in a clayey soil.In fact,this assumed cohesive strength is defined by the intercept,on the shear strength axis,of a tangent to a curvilinear Mohr envelope.This curvature is the result of the interlocking of asperities on the matching surfaces of the joints and
the increase in shear strength given by this interlocking plays a crucial role in the 100 Chapter 7:A slope stability problem in Hong Kong stability of slopes such as that under consideration in this chapter.A full discussion on the shear strength of discontinuities in rock masses is given in Chapter 4.

英语翻译One of the most critical steps in any limit equilibrium analysis is the determination or the estimation of the shear strength parameters (c and φ) for the surface along which it is anticipated that sliding will take place.In the case of
其中最关键的步骤以任何极限平衡分析测定或估算抗剪强度参数(c、φ)的表面及预期滑动.在这个斜坡上寿茅坪道路,没有抗剪强度是可用的信息的时候,所以估计,初步研究了由出版信息的基础上对类似的岩石.
该书收获(1974年)出版,情节、复制图7.8,粘性的优点和摩擦角的岩石和土壤,基于估计结果的公布的抗剪强度反演斜坡破坏.这个故事是在一个椭圆区
涵盖范围估计为单节理的剪切强度unweathered花岗石.在选择这一范围认为摩擦角φ大概的范围很广,从30°平面表面非常光滑,45度粗糙或半硬质合金表面.
更多的粘结强度是很难估计,0.05
被选中的0.2兆帕的结果为依据,对边坡back-analyses绘制如图7.8级
图7.8:摩擦角之间的关系、粘聚力斜坡破坏动员各种材料.在绘制分被出版信息的反馈分析边坡的失败.1974年,跟收获后).
有些读者可能会很惊讶这一粘结强度已假定为关节表面,明显地没有拉伸强度或' ',就会发现粘性土中.事实上,这种假设粘结强度是被截获、剪切力轴,一个切线方向的曲线莫尔信封.这是由于曲率的匹配的齿形相连的关节面
增加的剪切强度由该联锁起着至关重要的作用,在100米第七章:一个边坡稳定问题在香港的稳定边坡的.例如,在考虑在这一章.一个充分的讨论的剪切强度的岩层面在第4章.