基于一种重塑性制样方法的节理黄土力学特性试验研究∗

王丽丽

您当前的位置：

首页 >

文章列表页 >

基于一种重塑性制样方法的节理黄土力学特性试验研究∗

更新时间：2025-09-25

- 基于一种重塑性制样方法的节理黄土力学特性试验研究∗
- Experimental Study on Mechanical Properties of Jointed Loess based on a Remouldling Sample Method
- 防灾减灾工程学报 2020年第1期页码：35-42
- 作者机构：
  
  西安理工大学岩土工程研究所,陕西,西安,710048
- 作者简介：
- 基金信息：
  
  中国地震局地震预测所基本科研业务费专项资金（2019IESLZ05）、中国地震局地震预测所基本科研业务费专项（2016IESLZ04）、国家自然科学基金项目（11572246, 51779207）资助
- DOI：
  中图分类号： TU411.5
- 纸质出版：2020
- 稿件说明：
移动端阅览
王丽丽,李宁,何敏,刘青霞.基于一种重塑性制样方法的节理黄土力学特性试验研究∗[J].防灾减灾工程学报,2020,(1):35-42

WANG Lili. Experimental Study on Mechanical Properties of Jointed Loess based on a Remouldling Sample Method[J]. 2020, (1): 35-42.
王丽丽,李宁,何敏,刘青霞.基于一种重塑性制样方法的节理黄土力学特性试验研究∗[J].防灾减灾工程学报,2020,(1):35-42 DOI：

WANG Lili. Experimental Study on Mechanical Properties of Jointed Loess based on a Remouldling Sample Method[J]. 2020, (1): 35-42. DOI：

摘要

黄土节理是控制黄土地基、边坡和地下工程破坏与稳定性的重要因素，探讨节理性黄土的破坏特性对于了解边坡后缘拉裂演化过程、滑动面的生成具有重要意义。针对原状节理性黄土室内试验试样制备困难的问题，考虑节理面低强度、弱胶结的特点，以一种接触面模拟材料为载体，结合重塑制样的方法，提出一种节理性黄土室内三轴试样的制样方法，通过重塑试样与原状试样的节理面抗拉强度对比分析，验证该方法的合理性和有效性。在此基础上，开展节理性黄土的无侧限抗压强度试验和三轴压缩试验，讨论节理性黄土试样的强度与破坏规律。研究结果表明：节理的存在对试样强度和破坏的影响与节理倾角和围压大小有关，表现为低围压和45°倾角时的低强度效应； “沿节理面滑动破坏”与“破裂面与节理面呈X型共轭剪切破坏”是无侧限和三轴条件下的含单条贯通型节理性试样的两种典型破坏模式；非贯通型节理性试样的抗压破坏主要为“破裂面与节理面贯通型破坏”与“破裂面与节理面非贯通型破坏”两种类型。

Abstract

Loess joint is an important factor to affect the failure mechanism and stability of loess foundation and slope. Discussing the failure characteristics of jointed loess is of great significance for understanding the evolution process of tensile crack at the back edge of slope and the generation of sliding surface. In view of the difficulty in preparation of undisturbed jointed loess samples

considering the characteristics of low strength and weak cementation of jointed surface

a method of remodling jointed triaxial samples is proposed by using a kind of interface simulation material as a carrier and combining with remolding method. The rationality and validity of the method are verified by comparing the tensile strength of the joint surface between the remolded samples and the original samples. On this basis

the unconfined compressive strength test and triaxial compressive test of jointed loess are carried out

and the strength and failure law of jointed loess samples are discussed. The results show that the influence of joints on the strength and failure of specimens is related to the dip angle and confining pressure

which shows the effect of low strength at low confining pressure and large dip angle. sliding failure along the joint plane and X-shaped conjugate shear failure between the fracture surface and the joint plane are two typical failure modes of samples with one single through joint under unconfined and triaxial conditions. The compressive failure of non-penetrating jointed samples is mainly divided into "through-type failure of fracture surface and joint surface" and "non-penetrating -type failure of fracture surface and joint surface".

关键词

Keywords

references

梁庆国,李洁,李德武,等.黄土隧道围岩分级研究的若干问题[J].岩土工程学报,2011,33(增1):177-183. Liang Q G,Li J,Li D W,et al.Some problems on surrounding rock classification of Loess tunnel[J].Chinese Journal of Geotechnical Engineering,2011,33(Sup 1):177-183.(in Chinese)

孙广忠,孙毅.地质工程学原理[M].北京:地质出版社,2004:158-161. Sun G Zh,Sun Y.Principle of geotechnical engineering[M].Beijing:Geological Publishing House,2004:158-161.(in Chinese)

骆进,项伟,吴云刚,等.陕北黄土垂直节理形成机理的试验研究[J].长江科学院院报,2010,27(3):38-41,45. Luo J,Xiang W,Wu Y G,et al.Experimental study on formation of Loess vertical joints in north Shanxi province[J].Journal of Yangtze River Scientific Research Institute,2010,27(3):38-41,45.(in Chinese)

王正贵,康国瑾,马崇武,等.关于黄土垂直节理形成机制的探讨[J].中国科学(B辑),1993,23(7):765-770. Wang Zh G,Kang G J,Ma Ch W,et al.Discussion on formation mechanism of vertical joints in Loess [J].Science in China(B series),1993,23(7):765-770.(in Chinese)

李同录,王红,付昱凯,等.黄土垂直节理形成机理的试验模拟[J].地球科学与环境学报,2014,36(2):127-134. Li T L,Wang H,Fu Y K,et al.Test simulation on the forming mechanism of Loess Vertical Joints[J].Journal of Earth Sciences and Environment,2014,36(2):127-134.(in Chinese)

冯连昌,郑晏武.中国湿陷性黄土[M].北京:中国铁道出版社,1982. Feng L Ch,Zheng Y W.Collapsible loess in China[M].BeiJing:China Railway Publishing House,1982.(in Chinese)

胡卸文, 李群丰, 赵泽三, 等. 裂隙性粘土的力学特性[J]. 岩土工程学报,1994,16(4):81?88. Hu X W,Li Q F,Zhao Z S,et al.Mechanical properties of fissured clay[J]. Journal of Geotechnical Engineering,1994,16(4):81?88.(in Chinese)

赵中秀, 王小军. 超固结状态下裂隙粘土的强度特性[J]. 中国铁道科学,1995,16(4):56-62. Zhao Zh X,Wang X J.The Shearing strength behaviours of over consolidated fissure clays[J]. Chinese Railway Science,1995,16(4):56?62.(in Chinese)

孙萍,彭建兵,吴树仁,等.裂隙性黄土力学特性试验研究[J].中南大学学报(自然科学版),2015,46(6):2 188-2 195. Sun P,Peng J B,Wu Sh R,et al.An experimental study on mechanical properties of fractured Loess[J].Journal of Central South University(Science and Technology),2015,46(6):2 188-2 195.(in Chinese)

卢全中,彭建兵.黄土体结构面的发育特征及其灾害效应[J].西安科技大学学报,2006,26(4):446-450. Lu Q Zh,Peng J B.Characteristics of structure plan of loess mass in loess plateau of China and its hazard effect[J].Journal of Xi’an University of Science and Technology,2006,26(4):446-450.(in Chinese)

卢全中,陈树峰,彭建兵,等.三轴压缩条件下裂隙性黄土应力-应变特性及变形破坏机制[J].中国公路学报,2015,28(1):8-16. Lu Q Zh,Chen Sh F,Peng J B,et al.Stress-strain features and deformation failure mechanisms of fissures Loess under triaxial compression[J].China Journal of Highway and Transport,2015,28(1):8-16.(in Chinese)

徐善常,梁庆国,李帅帅,等.甘肃定西原状Q_3黄土各向异性试验研究[J].地质力学学报,2015,21(3):378-385. Xu Sh Ch,Liang Q G,Li Sh Sh,et al.Experimental study on anisotropic characteristics of undisturbed Q3 Loess from Dingxi,Gansu [J].Journal of Geomechanics,2015,21(3):378-385.(in Chinese)

罗传庆,张吾渝,李辉,等.西宁地区原状黄土强度各向异性试验研究[J].工程地质学报,2016,24(6):1327-1 332. Luo Ch Q,Zhang W Y,Li H,et al.Experimental study on the anisotropic strength of intact Loess in Xining[J].Journal of Engineering Geology,2016,24(6):1 327-1 332.(in Chinese)

王铁行,王娟娟,方江峰.垂直节理影响的黄土隧道洞口段稳定性分析[J].地下空间与工程学报,2012,8(1):65-70. Wang T X,Wang J J,Fang J F.Stability analysis of loess tunnel entrance section considering the impact of vertical joints[J].Chinese Journal of Underground Space and Engineering，2012,8(1):65-70.(in Chinese)

夏才初,宋应龙,唐志成,等.反复直剪试验节理强度与粗糙度变化的研究[J].中南大学学报(自然科学版),2012,43(9):3 589-3 594. Xia C Ch,Song Y L,Tang Zh Ch,et al.Shear strength and morphology characteristic evolution of joint surface under cyclic loads[J].Journal of Central South University(Science and Technology),2012,43(9):3589-3 594.(in Chinese)

浏览量

570

下载量

CSCD

文章被引用时，请邮件提醒。

提交

工具集

关联资源

暂无数据