摘要
鲁布革坝于1989年建成后已经受了高水位的考验。本文利用该坝在填筑及蓄水期积累的大量观测资料及施工期直接从坝上取样的试验成果进行了计算模型的对比验证和模型参数的反馈分析。分析结果表明,按Duncan模型计算的水平位移明显偏大,按双屈服面弹塑性模型计算的沉降和位移比较理想,但为了更好符合实际变形过程,必须补充流变变形。文中提出了一个流变变形的计算模型,并通过反馈分析确定了模型参数。
Lubuge Dam was completed in l989 and has experienced the full reservior filling.Observationdata during both construction stage and operation stage and results of large dlameter triaxial test ofsampleS trom the filied embankment have been used to verif the conStitutive models of soil and rockmateriajs and tO back analyze some model constants which can hardly be determined in laboratory.Comparison of computed results with the observations showed that the Duncan’s hyperbolic model al-ways overestimates the horizontal movement of dam body,while the double-hardening model proposedby the author gives much better results for both settlements and lateral movements.In order to have abetter agreement between computation and observation,it is necessary to take the time dependentcreep deformation into account.There fore a model of creep deformation is presented and its constantsare determined through back analysls.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
1994年第3期1-13,共13页
Chinese Journal of Geotechnical Engineering
基金
水利水电科学基金
关键词
反馈分析
堆石坝
流变体
back analysis,rockfill dam, creep model.