基于波速变化的膨胀土疲劳损伤规律研究

韦秉旭; 黄震; 周海波; 向富荣

doi:10.3969/j.issn.1001-5485.2014.09.010

PDF(1517 KB)

raybet体育在线院报 ›› 2014, Vol. 31 ›› Issue (9) : 54-58. DOI: 10.3969/j.issn.1001-5485.2014.09.010

岩土工程

基于波速变化的膨胀土疲劳损伤规律研究

韦秉旭，黄震，周海波，向富荣

作者信息 +

Regularity of Fatigue Damage of Expansive Soil Based on Wave Velocity Variation

WEI Bing-xu, HUANG Zhen, ZHOU Hai-bo, XIANG Fu-rong

Author information +

文章历史 +

摘要

采用TH204型非金属声波检测仪，测试等幅干湿循环条件下膨胀土试件的纵波波速，提出了用纵波波速定义膨胀土疲劳损伤的损伤变量，探索了干湿循环作用下膨胀土的疲劳损伤变化规律。研究表明随着循环次数的增加，不同控制含水率下膨胀土损伤变量呈非线性增长，且增长幅度趋于平缓;控制含水率越大，损伤变量越小;循环幅度越大，损伤变量越大;控制含水率对第1次干湿循环的损伤变化起重要作用，对2～6次循环的损伤变化不具有规律性。本文建立的损伤演化公式，可用来判断膨胀土的损伤程度大小。

Abstract

The nonmetal acoustic detector type TH204 is used to test P-wave velocity of expansive soil under the condition of constant amplitude dry-wet circulation. The approach of using P-wave velocity to define damage variable of fatigue damage of expansive soils is proposed, and the law of fatigue damage under dry-wet circulation is explored. Results reveal that 1) with the increase of cycles, the damage variable of expansive soil increase nonlinearly under different control moisture contents, and the growth rate tends to be gentle; 2) the greater the control moisture content, the smaller the damage variable. The greater the cycle amplitude, the greater the cumulative damage variable; 3) the control moisture content plays an important role in the damage variation of the first dry-wet circulation, but from the second to the sixth cycles, the damage value variation shows no regularity with the change of control moisture content. Formula of damage evolution proposed in this research could be used to determine the damage extent of expansive soil.

导出引用

韦秉旭，黄震，周海波，向富荣. 基于波速变化的膨胀土疲劳损伤规律研究[J]. raybet体育在线院报. 2014, 31(9): 54-58 https://doi.org/10.3969/j.issn.1001-5485.2014.09.010

WEI Bing-xu, HUANG Zhen, ZHOU Hai-bo, XIANG Fu-rong. Regularity of Fatigue Damage of Expansive Soil Based on Wave Velocity Variation[J]. Journal of Changjiang River Scientific Research Institute. 2014, 31(9): 54-58 https://doi.org/10.3969/j.issn.1001-5485.2014.09.010

中图分类号： U416.167

参考文献

[1] 张家俊,龚壁卫,胡波,等. 干湿循环作用下膨胀土裂隙演化规律试验研究[J].岩土力学,2011,32(9):2729-2734. (ZHANG Jia-jun, GONG Bi-wei, HU Bo, et al. Study of Evolution Law of Fissures of Expansive Clay under Wetting and Drying Cycles[J]. Rock and Soil Mechanics, 2011,32(9) :2729-2734. (in Chinese))
[2] 杨和平,刘艳强,李晗峰.干湿循环条件下碾压膨胀土的裂隙发展规律[J]. 交通科学与工程,2012,28(1):1-5. (YANG He-ping, LIU Yan-qiang, LI Han-feng. The Development of Cracks　of　Compacted Expansive Soil under Dry-wet Cycling[J]. Journal of Transport Science and Engineering, 2012, 28(1): 1-5. (in Chinese))
[3] 卢再华,陈正汉,蒲毅彬.膨胀土干湿循环胀缩裂隙演化的CT试验研究[J]. 岩土力学,2002,23(4):417-422. (LU Zai-hua, CHEN Zheng-han, PU Yi-bin. A CT Study on the Crack Evolution of Expansive Soil during Drying and Wetting Cycles[J]. Rock and Soil Mechanics, 2002,23(4):417-422. (in Chinese))
[4] 包惠明,魏雪丰. 干湿循环条件下膨胀土裂隙特征分形研究[J]. 工程地质学报,2011,19(4):478-482. (BAO Hui-ming, WEI Xue-feng. Fractal Research on the Crack Characteristic Expansive Soil under Wetting-drying Cycle[J]. Journal of Engineering Geology, 2011, 19(4):478-482. (in Chinese))
[5] 易顺明,黎志恒,张延中. 膨胀土裂隙结构的分形特征及其意义[J].岩土工程学报,1999,21(3):294-298. (YI Shun-min, LI Zhi-heng, ZHANG Yan-zhong. The Fractal Characteristics of Fractures in Expansion Soil and Its Significance[J]. Chinese Journal of Geotechnical Engineering, 1999,21(3): 294-298. (in Chinese))
[6] 徐彬,殷宗泽,刘述丽. 裂隙对膨胀土强度影响的试验研究[J].水利水电技术,2010,41(9):100-104. (XU Bin, YIN Zong-ze, LIU Shu-li. Experimental Study on Strength of Expansive Soil under Influence of Cracks [J]. Water Resources and Hydropower Engineering, 2010, 41(9):100-104. (in Chinese))
[7] 吕海波,曾召田,赵艳林. 干湿交替环境下膨胀土的累积损伤初探[J]. 自然灾害学报,2012,21(6):119-123. (LV Hai-bo,ZENG Zhao-tian,ZHAO Yan-lin. Preliminary Study on Accumulative Damage of Expansive Soil in Alternation of Wetting-drying Environment[J]. Journal of Natural Disaster, 2012,21(6): 119-123. (in Chinese))
[8] 于连顺. 干湿交替环境下膨胀土的累积损伤研究[D].南宁:广西大学,2008. (YU Lian-shun. Research on the Cumulative Damage to Expansive Soil in Wetting-drying cycle Condition[D]. Nanning: Guangxi University,2008. (in Chinese))
[9] 雷胜友,许瑛. 膨胀土损伤增量规律试验研究[J]. 铁道科学与工程学报,2005,2(4):6-10. (LEI Sheng-you, XU Ying. Experimental Investigation on the Damage Variance Change of Expansive Soil[J]. Journal of Railway Science and Engineering, 2005, 2(4): 6-10. (in Chinese))
[10]卢再华,陈正汉,蒲毅彬.原状膨胀土损伤演化的三轴CT试验研究[J]. 水利学报,2002,(6):106-112. (LU Zai-hua, CHEN Zheng-han, PU Yi-bin. Study on Damage Evolution of Natural Expansive Soil with Computerized Tomography during Triaxial Shear Test[J]. Journal of Hydraulic Engineering, 2002, (6): 106-112. (in Chinese))
[11]尤明庆,苏承东,李小双. 损伤岩石试样的力学特性与纵波速度关系研究[J].岩石力学与工程学报,2008,27(3):458-467. (YOU Ming-qing,SU Cheng-dong,LI Xiao-shuang. Study on Relation between Mechanical Properties and Longitudinal Wave Velocities for Damaged Rock Samples [J]. Chinese Journal of Rock Mechanics and Engineering,2008,27(3):458-467. (in Chinese))
[12]樊秀峰,简文彬. 砂岩疲劳特性的超声波速法试验研究[J]. 岩石力学与工程学报,2008,27(3):557-563. (FAN Xiu-feng,JIAN Wen-bin. Experimental Research on Fatigue Characteristics of Sandstone Using Ultrasonic Wave Velocity Method [J]. Chinese Journal of Rock Mechanics and Engineering,2008,27(3):557-563. (in Chinese))
[13]赵奎,金解放,王晓军,等. 岩石声速与其损伤及声发射关系研究[J]. 岩土力学,2007,28(10):2105-2109. (ZHAO Kui, JIN Jie-fang, WANG Xiao-jun, et al. Study on Rock Damage and Acoustic Emission Based on Ultrasonic Velocity Test of Rock Specimen under Uniaxial Compression[J]. Rock and Soil Mechanics,2007,28(10):2105-2109. (in Chinese))
[14]赵明阶,徐蓉.岩石损伤特性与强度的超声波速研究[J]. 岩土工程学报, 2000, 22(6): 720－722. (ZHAO Ming-jie, XU Rong. The Rock Damage and Strength Study Based on Ultrasonic Velocity[J]. Chinese Journal of Geotechnical Engineering,2000,22(6):720-722. (in Chinese))
[15]王峥辉. 下蜀黄土超声波波速与物理力学性质实验研究[D]. 南京:河海大学,2007. (WANG Zheng-hui. Experimental Study on Ultrasonic Wave Velocity and Physico-mechanical Test on Xiashu Loess[J]. Nanjing: Hohai University, 2007. (in Chinese))
[16]樊秀峰,吴振祥,简文彬. 循环荷载下砂岩疲劳损伤过程的声学特性分析[J]. 岩土力学,2009,30(增):58-62. (FAN Xiu-feng, WU Zhen-xiang, JIAN Wen-bin. Analysis of Acoustic Property of Sandstone Fatigue Damage under Cyclic Loading[J]. Rock and Soil Mechanics, 2009,30(Sup.): 58-62. (in Chinese))
[17]刘小文,常立君,胡小荣. 非饱和红土基质吸力与含水率及密度关系试验研究[J]. 岩土力学,2009,30(11):3302-3306. (LIU Xiao-wen,CHANG Li-jun,HU Xiao-rong. Experimental Research of Matric Suction with Water Content and Dry Density of Unsaturated Laterite[J]. Rock and Soil Mechanics, 2009,30(11):3302-3306. (in Chinese))