循环冻融条件下节理岩体损伤破坏试验研究

›› 2014, Vol. 35 ›› Issue (6): 1547-1554.

循环冻融条件下节理岩体损伤破坏试验研究

刘红岩^{1, 2}，刘冶¹，邢闯锋¹，张力民^{3, 4}，马敏²

1.中国地质大学（北京）工程技术学院，北京 100083；2.西藏大学工学院，拉萨 850000； 3.北京科技大学土木工程与环境学院，北京100083；4.河北承德钢铁公司，河北承德067000

收稿日期:2013-03-05 出版日期:2014-06-10 发布日期:2014-06-20
作者简介:刘红岩，男，1975年生，博士，副教授，主要从事岩土工程方面的教学与科研工作
基金资助:
国家自然科学基金项目（No. 41002113；No. 41162009）；教育部科学技术研究重点项目（No. 211175）；西藏大学国家大学生创新计划项目（No. 1069411048）。

Test study of damage failure of jointed rock mass under freezing-thawing cycles

LIU Hong-yan^1,2，LIU Ye¹，XING Chuang-feng¹，ZHANG Li-min^3,4，MA Min²

1. School of Engineering & Technology, China University of Geoseiences (Beijing), Beijing 100083, China；2. School of Engineering, Tibet University, Lasha 850000, China；3. School of Civil and Environmental Engineering, Beijing University of Science and Technology, Beijing 100083, China； 4. Hebei Chengde Iron and Steel Corporation, Chengde, Hebei 067000, China

Received:2013-03-05 Online:2014-06-10 Published:2014-06-20

摘要/Abstract

摘要： 通过循环冻融和相似材料试验，研究了节理岩体在冻融条件下的损伤破坏机制及其相应的力学特性。通过对经历冻融循环后的试件损伤破坏模式的观察和单轴压缩试验，重点研究了节理倾角、节理贯通度、节理条数、节理充填物厚度、节理充填物类型、试件饱和度、冻融循环次数等对试件冻融损伤破坏模式、单轴抗压强度和弹性模量的影响。研究发现：节理存在及其物理力学性质对岩体的冻融损伤破坏模式及强度均有很大影响。节理倾角通过影响冻融裂纹的起裂位置进而影响其破坏模式和强度；随着贯通度的增加，试件表面裂纹由稀变密；随着节理条数增加，试件受冻融影响明显加剧；随着节理充填物厚度增加，试件冻融损伤程度先增加后减小；节理充填物类型对试件冻融损伤程度也有一定影响；随着试件饱和度的增加，试件冻融损伤程度先减小后增加；随着冻融循环次数的增加，节理试件表面因冻胀引起的裂纹逐渐增多、变宽，且其抗冻融特性较完整试件差。上述研究成果对寒区岩体工程建设及安全运营具有重要的参考价值。

关键词: 循环冻融, 节理岩体, 损伤, 单轴抗压强度, 弹性模量, 破坏模式

Abstract: The damage failure mechanism and mechanical characteristics of jointed rock mass have been studied through freezing- thawing cycles and similar material test method. Through the observation of the damage failure modes and uniaxial compression test of the samples after freezing-thawing cycles, the effects of joint dip angle, joint continuity degree, joint set, joint filling depth, sort of joint filling, sample’s saturation degree and number of cycles on the damage failure mode, uniaixal compression strength and elastic modulus are studied. It is shown that the existence of joint and its physico-mechanical properties have much effect on the damage failure modes and strength. The joint dip angle affects the failure modes and strength by affecting the occurrence position of freezing-thawing cracks. The cracks become more with joint continuity degree. The effect of freezing-thawing on the samples becomes worse with number of joints. The freezing-thawing damage degree first increases then decreases with joint filling depth. The sort of joint filling has certain effect on the freezing-thawing damage degree. The freezing-thawing damage degree first decreases then increases with the sample’s saturation degree. The cracks become more and wider with the number of cycles; and its anti-freezing-thawing property is worse than that of the intact one. The above research conclusions can provide valuable references to the constructions and safety operation of rock mass projects in cold regions.

Key words: freezing-thawing cycle, jointed rock mass, damage, uniaxial compression strength, elastic modulus, failure mode

中图分类号:

TU 111.2+5

刘红岩，刘冶，邢闯锋，张力民，马敏，. 循环冻融条件下节理岩体损伤破坏试验研究[J]. , 2014, 35(6): 1547-1554.

LIU Hong-yan ，LIU Ye ，XING Chuang-feng ，ZHANG Li-min ，MA Min，. Test study of damage failure of jointed rock mass under freezing-thawing cycles[J]. , 2014, 35(6): 1547-1554.

参考文献

相关文章 15

[1]	孙锐, 杨峰, 阳军生, 赵乙丁, 郑响凑, 罗静静, 姚捷, . 基于二阶锥规划与高阶单元的自适应上限有限元研究[J]. 岩土力学, 2020, 41(2): 687-694.
[2]	陈卫忠, 李翻翻, 雷江, 于洪丹, 马永尚, . 热−水−力耦合条件下黏土岩蠕变特性研究[J]. 岩土力学, 2020, 41(2): 379-388.
[3]	张峰瑞, 姜谙男, 杨秀荣, 申发义. 冻融循环下花岗岩剪切蠕变试验与模型研究[J]. 岩土力学, 2020, 41(2): 509-519.
[4]	梁珂, 陈国兴, 刘抗, 王彦臻, . 饱和珊瑚砂最大动剪切模量的循环加载衰退特性及预测模型[J]. 岩土力学, 2020, 41(2): 601-611.
[5]	王培涛, 黄正均, 任奋华, 章亮, 蔡美峰, . 基于3D打印的含复杂节理岩石直剪特性及破坏机制研究[J]. 岩土力学, 2020, 41(1): 46-56.
[6]	李翻翻, 陈卫忠, 雷江, 于洪丹, 马永尚, . 基于塑性损伤的黏土岩力学特性研究[J]. 岩土力学, 2020, 41(1): 132-140.
[7]	戴国亮, 朱文波, 郭晶, 龚维明, 赵学亮, . 软黏土中吸力式沉箱基础竖向抗拔承载特性试验研究[J]. 岩土力学, 2019, 40(S1): 119-126.
[8]	宋勇军, 杨慧敏, 张磊涛, 任建喜. 冻结红砂岩单轴损伤破坏CT实时试验研究[J]. 岩土力学, 2019, 40(S1): 152-160.
[9]	范运辉, 朱其志, 倪涛, 张坤, 张振南, . 基于弹性张量离散化的脆延转变本构模型研究[J]. 岩土力学, 2019, 40(S1): 181-188.
[10]	王钦科, 马建林, 陈文龙, 杨彦鑫, 胡中波, . 上覆土嵌岩扩底桩抗拔承载特性离心模型试验及计算方法研究[J]. 岩土力学, 2019, 40(9): 3405-3415.
[11]	李杰林, 朱龙胤, 周科平, 刘汉文, 曹善鹏, . 冻融作用下砂岩孔隙结构损伤特征研究[J]. 岩土力学, 2019, 40(9): 3524-3532.
[12]	张超, 杨期君, 曹文贵. 考虑峰值后区应力跌落速率的脆岩损伤本构模型研究[J]. 岩土力学, 2019, 40(8): 3099-3106.
[13]	孙峰, 薛世峰, 逄铭玉, 唐梅荣, 张翔, 李川, . 基于连续损伤的水平井射孔-近井筒三维破裂模拟[J]. 岩土力学, 2019, 40(8): 3255-3261.
[14]	刘新荣, 邓志云, 刘永权, 刘树林, 路雨明, . 地震作用下水平层状岩质边坡累积损伤与破坏模式研究[J]. 岩土力学, 2019, 40(7): 2507-2516.
[15]	马德鹏, 周岩, 刘传孝, 商岩冬, . 不同卸围压速率下煤样卸荷破坏能量演化特征[J]. 岩土力学, 2019, 40(7): 2645-2652.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed