论文部分内容阅读
龙羊峡重力拱坝高178m,是国内目前最高最大的拱坝.坝区附近存在着八条断层,地质条件复杂.根据二维及三维弹塑性有限元分析和地质力学模型试验表明:如断层深部不处理,蓄水后尚不及正常高水位时,拱坝高部及基础可能发生破坏;如遇设计地震或发生可能的水库滑坡时,高部基础和拱坝坝踵可能产生严重破坏.断层深部主要用75000m~3地下混凝土结构处理后,坝肩岩体刚化,承载能力显著提高,拱坝及基础的超载安全度可以提高到3.3-5.8以上,满足设计要求.目前大坝已挡水百余米,未见异常.进一步观测仍在进行中.
Longyangxia gravity arch dam is 178m high, which is the highest arch dam in China at present. There are eight faults near the dam area with complex geological conditions. According to 2D and 3D elasto-plastic finite element analysis and geomechanical model tests, Failure to do so may cause damage to the upper part of the arch dam and the foundations when the reservoir is not yet at a normal high water level. In the event of a design earthquake or possible reservoir landslide, the high foundation and the dam heel of the arch dam may cause serious damage. Mainly with 75000m ~ 3 underground concrete structure, the abutment rock mass is rigidified and its carrying capacity is significantly increased, and the overloading safety of the arch dam and foundation can be increased to 3.3-5.8, which meets the design requirements. I meters without exception, further observation is still underway.