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岩体负泊松比试验研究
引用本文:涂忠仁,杨强. 岩体负泊松比试验研究[J]. 岩土力学, 2008, 29(10): 2833-2836
作者姓名:涂忠仁  杨强
作者单位:1. 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084;重庆交通大学,重庆,400074
2. 清华大学,水沙科学与水利水电工程国家重点实验室,北京,100084
摘    要:高分子材料领域已经研制出一些具有负泊松比效应的材料,而岩石材料中负泊松比现象十分罕见.基于国内首条在建海底隧道--厦门东通道海底隧道工程而开展的岩体室内动力测试和静力测试工作中,均观察到了泊松比为负值的现象.利用品粒转动模型,对此特殊试验现象的成因给出了初步解释,并得到了岩体试样泊松比值的合理计算方法.

关 键 词:岩体  负泊松比  晶粒转动模型  试验研究
收稿时间:2007-05-28

Test research on negative Poisson's ratio of rock mass
TU Zhong-ren,YANG Qiang. Test research on negative Poisson's ratio of rock mass[J]. Rock and Soil Mechanics, 2008, 29(10): 2833-2836
Authors:TU Zhong-ren  YANG Qiang
Affiliation:1. State Key Laboratory of Hydrosciences and Hydraulic Engineering, Tsinghua University , Beijing 100084, China; 2. Chongqing Jiaotong University, Chongqing 400074, China
Abstract:Some polymer materials with negative Poisson’s ratio had been developed, but negative Poisson’s ratio effect was seldom observed for rockmass. Based on the first underconstruction undersea tunnel as engineering background, a brief introduction of indoor test on the rockmass specimens was given; and negative Poisson’s ratio effect was observed during test. A new microcosmic deformation mechanism-lattic-rotation model which could interpret the observed test phenomenon was proposed; and a credible data proceeding method to obtain the actual value of Poisson’s ratio was proposed too.
Keywords:rock mass  negative Poisson’s ratio  lattic-rotation model  test research  
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