基于Hoek-Brown准则的位移反演分析GSI与岩体波速关系

doi:10.11988/ckyyb.20160656

院报 ›› 2017, Vol. 34 ›› Issue (10): 118-123.DOI: 10.11988/ckyyb.20160656

基于Hoek-Brown准则的位移反演分析GSI与岩体波速关系

田茂霖^1a，1b，肖洪天^1a，1b，闫强刚²

1.山东科技大学 a.土木工程与建筑学院；b.山东省土木工程防灾减灾重点实验室，山东青岛 266590；
2.青岛市勘察测绘研究院，山东青岛 266555

收稿日期:2016-06-29 修回日期:2016-07-28 出版日期:2017-10-01 发布日期:2017-10-25
通讯作者: 肖洪天(1964-),男,河北孟村人,教授,博士生导师,主要从事梯度材料断裂力学新型边界元法研究,(电话)13792908171(电子信箱)xiaohongtian@tsinghua.org.cn。
作者简介:田茂霖(1991-),男,山东新泰人,硕士研究生,主要从事岩土工程数值方法方面的研究,(电话)18653816877(电子信箱)maolintml@163.com。
基金资助:
青岛市建设科技计划项目(JK2014-5)

Establishment of the Relationship Between Geological Strength Indexand Ultrasonic Velocity of Rock Mass Through Displacement BackAnalysis Based on Hoek-Brown Criterion

TIAN Mao-lin^1,2, XIAO Hong-tian^1,2, YAN Qiang-gang³

1.College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, China;
2.Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China;
3.Qingdao Institute of Survey and Geomatics, Qingdao 266555, China

Received:2016-06-29 Revised:2016-07-28 Online:2017-10-01 Published:2017-10-25

摘要/Abstract

摘要： 地质强度指标GSI的选取有地域性,GSI的准确性会直接影响Hoek-Brown强度准则的应用效果。基于Hoek-Brown准则对青岛地铁3号线永平路站—青岛火车北站区间内的地质强度指标GSI、扰动系数D和泊松比进行反演研究,并利用均匀设计表对反演参数进行范围划分和试验点选取,有效降低了试验次数,同时保证了较好的试验效果。借助FLAC^3D软件计算出10个断面的GSI值,并研究了GSI与岩体波速V_p的关系,通过线性拟合得到GSI-V_p关系式,并用于预测青岛地铁3号线重永区间的GSI值。结果表明:GSI-V_p关系式所预测的GSI值用于重永区间数值模拟计算,所得位移值与该区间监测值的相对误差较小,具有较好的一致性,进而验证了关系式的合理性。研究成果为工程上准确获得GSI提供了新方法。

关键词: Hoek-Brown准则, 位移反演分析, 均匀设计, 地质强度指标GSI, 岩体波速V_p

Abstract: The values of geological strength index (GSI) are always regional and have an influence on the application of Hoek-Brown criterion. In this article, back analysis was performed for geological strength index (GSI), disturbance factor D and Poisson ratio based on the Hoek-Brown criterion for the tunnel from Yongping Road to the North Station of Qingdao Metro Line 3. Uniform design table was employed to deal with the range of parameters and the selection of experimental points for back analysis to reduce the number of experiments and guarantee better experiment results. Furthermore, the GSI values of 10 different cross-sections were calculated by FLAC^3D software and the relationship between GSI and rock mass ultrasonic velocity (V_p) was obtained using linear fitting method. The formula of GSI-V_p was applied to estimate the GSI values for the tunnel from Middle Chongqing Road to Yongping Road of Qingdao Metro Line 3. The calculated result was in good agreement with monitoring data, which verifies the rationality of the GSI-V_p formula and provides a new approach for accurately obtaining the GSI values.

Key words: Hoek-Brown criterion, displacement back analysis, uniform design, geological strength index(GSI), rock mass ultrasonic velocity (V_p)

中图分类号:

TU45
U231

田茂霖，肖洪天，闫强刚. 基于Hoek-Brown准则的位移反演分析GSI与岩体波速关系[J]. 院报, 2017, 34(10): 118-123.

TIAN Mao-lin, XIAO Hong-tian, YAN Qiang-gang. Establishment of the Relationship Between Geological Strength Indexand Ultrasonic Velocity of Rock Mass Through Displacement BackAnalysis Based on Hoek-Brown Criterion[J]. JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI, 2017, 34(10): 118-123.

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基于Hoek-Brown准则的位移反演分析GSI与岩体波速关系

Establishment of the Relationship Between Geological Strength Indexand Ultrasonic Velocity of Rock Mass Through Displacement BackAnalysis Based on Hoek-Brown Criterion

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