采用波动方法探测土石混合体结构特性的可行性研究
FEASIBILITY STUDY OF WAVE METHOD FOR DETECTING STRUCTURAL PROPERTIES OF SOIL-ROCK MIXTURES
查看参考文献17篇
|
文摘
|
将土石混合体概化为由土体和块石随机分布构成的宏观致密和等效均匀介质, 将深部爆源的爆炸效果用等效冲击载荷代替, 以基于连续介质力学的离散元方法(CDEM)的计算程序为平台, 以模型均匀随机技术为条件, 通过研究土石混合体内部结构特性对应力波传播过程的影响, 建立波动响应与内部结构特性(包括含石率、块石特征尺寸和土石分布规律)之间的对应关系。研究结果表明: 在一定载荷条件及材料性质下, 加速度波的最大振幅和主频受含石率和块石特征尺寸的影响有着规律性的变化: 均匀分布情况下, 不同分布规律对于波动响应的影响很小, 可以忽略: 分别给出随含石率和块石特征尺寸变化的波动响应规律(最大振幅、主频)拟合曲面, 且最大振幅和主频的值满足实际工程的可测性: 以给定波动响应情况为例, 通过已知最大振幅和主频易在拟合影响曲面上查出含石率和块石特征尺寸。从规律性、可测性和易操作性3个方面说明采用波动方法探测土石混合体结构特性的可行性。 |
|
其他语种文摘
|
Soil-rock mixtures are seen as the macro-density and equivalent homogeneous medium constituted by soil and rock under random distribution: and the explosion effect of deep explosion source is replaced by equivalent impact load. The platform of continuum media mechanics of discrete element method(CDEM)is used: and the uniform random technique is adopted. By studying the impact of internal structural properties of soil-rock mixtures on stress wave propagation process, the relationships between internal structural properties(including percentage of rock, feature size of rock block and distribution of soil-rock)and wave responses are established. The study results show that in certain of the same loading and material properties, the maximum amplitude and dominant frequency of acceleration wave have regular changes under the effect of percentage of rock and feature size of rock block. Under the uniform distribution, the impact of different distributions of soil-rock on wave response is very small and can be neglected. The fitting surfaces of wave response(maximum amplitude and dominant frequency)with the variations of percentage of rock and feature size of rock block are given: and the maximum amplitude and dominant frequency both meet the testability of actual project. Taking an assigned wave response for example, percentage of rock and feature size of rock block are given easily on the fitting impact surface by means of the assigned maximum amplitude and dominant frequency. The feasibility of wave method for detecting structural properties of soil-rock mixtures is illustrated from three aspects of regularity, testability and handleability. |
|
来源
|
岩石力学与工程学报
,2011,30(9):1855-1863 【核心库】
|
|
关键词
|
岩石力学
;
土石混合体
;
波动方法
;
含石率
;
块石特征尺寸
;
土石分布
|
|
地址
|
中国科学院力学研究所, 北京, 100190
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-6915 |
|
学科
|
建筑科学 |
|
基金
|
国家973计划
;
国家自然科学基金重点项目
|
|
文献收藏号
|
CSCD:4341865
|
参考文献 共
17
共1页
|
|
1.
徐文杰. 土石混合体细观结构及力学特性数值模拟研究.
岩石力学与工程学报,2007,26(2):300-311
|
被引
57
次
|
|
|
|
|
2.
殷跃平. 三峡库区巫山移民新城址松散堆积体成因机制研究.
工程地质学报,2000,8(3):265-271
|
被引
26
次
|
|
|
|
|
3.
徐文杰. 虎跳峡龙蟠右岸土石混合体野外试验研究.
岩石力学与工程学报,2006,25(6):1270-1277
|
被引
53
次
|
|
|
|
|
4.
赫建明.
三峡库区土石混合体的变形与破坏机制研究[博士学位论文],2004
|
被引
12
次
|
|
|
|
|
5.
国家电力公司中南勘测设计研究院.
金沙江虎跳峡河段梯级开发方式设计报告,1999
|
被引
3
次
|
|
|
|
|
6.
Wang Y. Granular material theories revisited.
Geomorphological Fluid Mechanics,2001:79-107
|
被引
3
次
|
|
|
|
|
7.
Liu S H. Numerical study of soil collapse behavior by discrete element modeling.
Computers and Geotechnics,2003,30(5):399-408
|
被引
17
次
|
|
|
|
|
8.
Xu W J. Study on the mesostructure and mesomechanical characteristics of the soil-rock mixture using digital image processing based finite element method.
International Journal of Rock Mechanics and Mining Sciences,2008,45(5):749-762
|
被引
41
次
|
|
|
|
|
9.
Li S H. A new numerical method for DEM block and particle model.
International Journal of Rock Mechanics and Mining Sciences,2004,41(3):436-440
|
被引
25
次
|
|
|
|
|
10.
油新华.
土石混合体的随机结构模型及其应用研究[博士学位论文],2001
|
被引
8
次
|
|
|
|
|
11.
Yue Z Q. Finite element modeling of geomaterials using digital image processing.
Computers and Geotechnics,2003,30(5):375-397
|
被引
73
次
|
|
|
|
|
12.
Li X. In-situ tests and a stochastic structural model of rock and soil aggregate in the Three Gorges reservoir area.
International Journal of Rock Mechanics and Mining Sciences,2004,41(3):494-499
|
被引
15
次
|
|
|
|
|
13.
Lanaro F. 3D characterization of coarse aggregates.
Engineering Geology,2002,65(1):17-30
|
被引
13
次
|
|
|
|
|
14.
李晓杰. 岩体爆破效应的声波探测.
爆破器材,2005,34(4):1-6
|
被引
3
次
|
|
|
|
|
15.
丁宝国. 瑞利波探测技术用于矿井地质超前探测.
煤田地质与勘探,2009,37(4):61-63
|
被引
2
次
|
|
|
|
|
16.
欧阳振华. 块石对土石混合体力学性能的影响研究.
实验力学,2010,25(1):61-67
|
被引
23
次
|
|
|
|
|
17.
李顺波. 爆炸冲击波在不同介质中传播衰减规律的数值模拟.
振动与冲击,2009,28(7):115-117
|
被引
16
次
|
|
|
|
|
了解气象卫星更多信息，请访问