水利水电工程岩体力学参数综合取值方法探讨

Discussion on comprehensive determination methods for rock mass mechanical parameters in hydropower projects

在研究岩土工程有关规程规范和各种力学参数取值方法特点的基础上,提出了水利水电工程岩体力学参数综合取值方法。综合考虑工程规模和地质条件的复杂程度,将取值方法分为3个层次:对于地质条件简单的小型工程以及在项目规划、可研阶段,可采用野外地质调查和少量室内试验进行岩体分级、查表,经工程类比取得地质建议值;对于地质条件复杂的中型以上工程,初步设计阶段应开展原位试验,并采用工程经验类比法结合现场地质条件确定地质建议值;对于重要的大型工程应做专题研究。除了上述方法外,还可应用计算机模拟试验、人工神经网络法、模糊数学预测法等,慎重确定地质建议值。在施工阶段可利用监测资料开展反演分析,对岩体稳定性进行复核。结合工程经验指出了参数选取应用时应注意的问题。

The conprehensive value deternination nethod for hydropower engineering can be divided into three layers on the basis of the project size as well as geology conplexity. For the projects characterized as snall scale and sinple geological condi-tion or for the planning and feasibility research stage,the rock nass paraneters can be deternined by engineering geological anal-ogy nethod and supplenented by rock nass classification through field geological survey and a few laboratory tests. For the pro-ject with nediun scale and conplex geological conditions,the in - situ testing should be carried out during the prelininary design phase,and the rock nass paraneters should be deternined by engineering geological analogy. For large - sized project,the non-ographic study is necessary besides the above nentioned nethod.