中部城市引松供水工程总干线围岩弹性抗力系数试验及参数选取

The Elastic Resistance Coefficient Test and Parameter Selection of Surrounding Rocks of the Water Supply Project to the Central Cities from Songhuajiang River

结合吉林省中部城市引松供水工程实例,采用现场液压枕径向加压法试验,得出在不同压力下岩体的力学参数,采用不同岩体单位抗力系数公式计算出岩体抗力系数,经过对比得出合理的围岩弹性抗力系数。根据现有室内外岩石力学试验成果资料、经验公式计算结果及相关规范参考值进行分析和整理,选取合理的围岩弹性抗力系数,对衬砌结构进行了优化计算,满足围岩稳定和衬砌结构的安全要求。

According to the water supply project of the central cities of Jilin province ,the mechanical parameters of rock mass at different pressures were obtained through in -situ test using the radial hydraulic pressure pillow method .And then ,the rock resistance coefficient was calculated according to the different rock units resistance coefficient formula . Through comparison ,the resonable elastic resistance coefficient of surrounding rocks was determined .Furthermore ,the lining structure was optimized to meet the security requirements of the surrounding rocks by selecting the appropriate elas-tic resistance coefficient of surrounding rocks based on the analysis and arrangement of the existing indoor and outdoor rock mechanics test data ,the calculation results of empirical formula and the reference value of relevant specifications .