地下工程围岩粘弹塑性参数反分析

Back analysis of viscoelastic-plastic parameters of surrounding rock in underground engineering

本文提出了根据现场短期量测位移,估算岩体粘弹塑性参数的反分析法.该法将增量反分析法同复合形优化法相结合,可反演出地应力.弹模及粘弹塑性参数.对一般大型洞室的围岩进行正反分析,可用本文程序迅速在微机上实现,并及时反馈到工程实际中去.

According to the displacement measured in situ in a short term, a back analysis method estimating the viscoelasto-plastic parameters of rock mass is presented in this paper.In this method, the increment back analysis method combined with the complex optimization method is used in the back analysis of the initial stress, the elastic modulus and the parameters of rock mass surrounding the large cavarn. The program can be carried out by a microcomputer and the results obtained feed back to the engineering practice timely.