坝区岩体的剪切蠕变经验方程及参数数值反演

山东大学学报(工学版) ›› 2012, Vol. 42 ›› Issue (6): 93-99.

坝区岩体的剪切蠕变经验方程及参数数值反演

陈芳1,张强勇1,杨文东1, 2,张绪涛1，李文纲3,王建洪3,贺如平3

1. 山东大学岩土与结构工程研究中心, 山东济南 250061; 2.中国石油大学(华东)储运与建筑工程学院, 山东青岛 266555; 3.中国水电顾问集团成都勘测设计研究院, 四川成都 610072

收稿日期:2012-03-28 出版日期:2012-12-20 发布日期:2012-03-28
作者简介:陈芳(1982- ),女,山东兖州人,博士研究生,主要研究方向为岩石力学理论. Email: chenfang1216@yahoo.com.cn
基金资助:
国家重点基础研究发展计划资助项目(2009CB724607);国家自然科学基金资助项目(41172268,51279093)

Shear creep empirical equations and creep parameter numerical inversion for dam zone rock mass

CHEN Fang1, ZHANG Qiang-yong1, YANG Wen-dong1, 2, ZHANG Xu-tao1, LI Wen-gang3, WANG Jian-hong3, HE Ru-ping3

1.Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 2. College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266555, China; 3.Chengdu Hydroelectric Investigation ＆ Design Institute, China Hydropower Engineering Consulting Group Corporation, Chengdu 610072, China

Received:2012-03-28 Online:2012-12-20 Published:2012-03-28

摘要/Abstract

摘要：

岩体的剪切蠕变特性是影响坝区边坡岩体变形与长期稳定性的重要因素之一。利用现场剪切蠕变试验数据回归拟合得到了坝区“硬、脆、碎”辉绿岩脉的剪切蠕变经验方程,并由最小二乘法得到了剪切蠕变经验方程的拟合参数;提出了可以真实模拟现场剪切蠕变试验过程以及岩体实际地层分布情况的蠕变参数数值反演分析方法。通过对比分析可知,回归拟合变形值及数值反演计算变形值均与试验变形值比较接近,最大误差均未超过8％,表明剪切蠕变经验方程能有效反映坝区岩体的剪切蠕变变形特性,且建立的剪切蠕变数值模型也是合理可靠的,这为深入认识和了解坝区辉绿岩脉在不同应力水平下的剪切蠕变力学特性提供了重要的试验和理论依据,也为坝基边坡工程稳定性分析和设计提供了技术参数保证。

关键词: 现场剪切蠕变试验, 蠕变经验方程, 蠕变参数数值反演, &ldquo, 硬、脆、碎&rdquo, 辉绿岩脉, 回归拟合

Abstract:

Shear creep characteristics is one of the important factors of deformation and longterm stability of slope rock mass. By regression fitting insitu shear creep test data, a shear creep empirical equation of “hard brittle tatter” diabase dikes was obtained. Using the least square method, the fitting parameters of empirical equation was gained. A creep parameter numerical inversion method was presented, which could simulate in-situ shear creep test process and the distribution of rock stratum. Comparative analysis indicated that the fitting curve and numerical curve could both reflect the test curve well and the maximum error was only 8％. So, the shear creep empirical equations could effectively reveal the shear creep characteristics of dam zone rock mass, and the shear creep numerical model was also reasonable and reliable. The inversion analysis method could help to understand shear creep characteristics under different stress levels of diabasic dike at dam site of Dagangshan Hydropower Station. This method could also provide important technical parameters guarantee for stability analysis and design of slope in dam zone.

Key words: in-situ shear creep test, creep empirical equations, creep parameter numerical inversion, hard, brittle and tatter diabase dikes, regression fit

中图分类号:

TU452

陈芳1,张强勇1,杨文东1, 2,张绪涛1，李文纲3,王建洪3,贺如平3. 坝区岩体的剪切蠕变经验方程及参数数值反演[J]. 山东大学学报(工学版), 2012, 42(6): 93-99.

CHEN Fang1, ZHANG Qiang-yong1, YANG Wen-dong1, 2, ZHANG Xu-tao1, LI Wen-gang3, WANG Jian-hong3, HE Ru-ping3. Shear creep empirical equations and creep parameter numerical inversion for dam zone rock mass[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2012, 42(6): 93-99.

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