基于Hoek-Brown极限平衡理论下的边坡稳定敏感性分析

研究Hoek-Brown准则中表征岩体性能的不同参数对边坡稳定性的影响,介绍了Hoek-Brown准则与极限平衡法相结合的边坡安全系数计算方法,结合灰关联度理论,利用Geo-slope软件中的Slope/w模块,结合岩体单轴抗压强度σ_(ci)、岩体性状m_i、地质强度指标GSI,以及岩体扰动因子D四个参数对某岩质边坡进行了单因素敏感性分析。结果表明:岩体的单轴抗压强度和地质强度指标是影响岩质边坡稳定的关键因素。灰关联度法简单方便,可直观准确地获取主要因素和次要因素,能广泛应用于边坡稳定性分析中,为量化边坡稳定敏感性分析提供了一种有效的方法。

库水位骤降边坡渗透稳定敏感性分析

为定量研究不同非饱和参数(进气值a、土水特征曲线斜率δ、残余含水率ε、渗透系数k)对边坡渗流特性及稳定性的影响规律,利用Geo-slope软件,基于Fredlund&Xing非饱和理论,采用灰关联度法对某土质边坡不同非饱和参数对边坡渗透稳定性的影响进行了敏感性分析。结果表明:参数a、k与浸润线高程成负相关,与位移及稳定系数成正相关;参数δ、ε与浸润线高程成正相关,而与位移及稳定系数成负相关;位移与稳定系数在库水位下降前期变化较大,而在库水位下降后期变化较小;边坡上部监测点的位移大于下部监测点的位移;对边坡稳定影响较大的参数为a与k,而参数δ与ε对边坡稳定性影响相对较小;采用灰关联度方法可直观准确地获取主要因素和次要因素,为量化研究非饱和参数对边坡稳定性的影响提供了一种方法。

Fusion Method for Interval Number Multi-sensor Information

The interval numbers are used to types and observation of sensors, a new fusion represent the characteristic values of object method for multi-sensor object recognition is proposed from the viewpoint of decision making theory. The method defines the distance matrix and grey association matrix between all object types and unknown object. After solving the optimization problem of maximizing the standard deviations for all attributes, the weights of the attributes are obtained. Thus, the result of recognition for the unknown object is given by the grey association degree. This method avoids the subjectivity of selecting attributes weights. It is straightforward and can be performed on computer easily. The simulated example demonstrates the feasibility and effectiveness of the proposed method.