论文部分内容阅读
地下工程开挖后,受开挖卸荷、爆破振动及其它施工影响,在围岩中形成一定范围的扰动区。在对其围岩力学参数进行反演时,有必要考虑不同区域的差异。依据损伤程度不同可以将围岩划分为若干力学参数不同的区域,提出了地下洞室围岩分区反演方法。并结合工程实际,利用功果桥水电站地下厂房某断面位移监测数据,对其围岩力学参数进行了分区反演,对反演所得参数进行有限元正算,所得监测点的位移与实测值误差在7%以内,证明了围岩分区方法的可行性与工程适用性。
After excavation of underground project, influenced by excavation and unloading, blasting vibration and other construction, a certain range of disturbance zone is formed in surrounding rock. In the inversion of the mechanical parameters of the surrounding rock, it is necessary to consider the differences of different regions. Based on the different degree of damage, the surrounding rock can be divided into several areas with different mechanical parameters, and the method of inversion of the surrounding rock partition of underground caverns is proposed. Combined with engineering practice, using the displacement data of a section of the underground powerhouse of the Gongguoqiao Hydropower Station, the mechanical parameters of the surrounding rock are inversely partitioned and the parameters of the inversion are calculated with the finite element method. The displacement of the obtained monitoring points and the measured error Within 7%, it proves the feasibility and engineering applicability of the surrounding rock partitioning method.