浅谈菲律宾某工程坝基岩体承载力取值方法

Value Method for Rock Mass Bearing Capacity in Dam Foundation of a Project in the Philippines

笔者主要介绍菲律宾某工程坝基岩体承载力取值的方法,同时和国内坝基岩体承载力取值方法进行对比,分析两者之间的差异。该取值方法运用Hoek-Brown强度准则求取坝基岩体的抗剪强度参数,再参考EM 1110-1-2908《Rock Foundations》计算坝基岩体承载力,得到了业主咨询工程师的认可。通过对比国内外的岩体承载力取值方法,发现各方法的计算结果有一定的可比性,主要差别是美国标准的取值方法基于太沙基土力学理论外延应用于岩体中,而国内标准的取值方法是基于工程经验。以期该取值方法为国外同类型工程提供参考。

The authors mainly introduce the method of determining the bearing capacity of dam foundation rock mass in a project in the Philippines,and compare it with the method of determining the bearing capacity of dam foundation rock mass in China,and analyze the difference between the two.This method uses Hoek-Brown strength criterion to obtain the shear strength parameters of dam foundation rock mass,and then calculates the bearing capacity of dam foundation rock mass with reference to EM 1110-1-2908 Rock Foundations,which is recognized by the owner's consulting engineer.By comparing the value methods of rock mass bearing capacity at home and abroad,it is found that the calculation results of each method are comparable.The main difference is that the value method of American standard is applied to rock mass based on the theory of Terzaghi soil mechanics,while the value method of domestic standard is based on engineering experience.It is expected that this method can provide reference for similar projects abroad.