您好,欢迎来到中国测试科技资讯平台!

首页> 《中国测试》期刊 >本期导读>磷石膏动模量及阻尼比试验研究

磷石膏动模量及阻尼比试验研究

250    2024-05-24

免费

全文售价

作者:蔡国军1,2, 卫俊仁1,2, 杨森林1,2, 蒲洪1,2, 李林1,2

作者单位:1. 地质灾害防治与地质环境保护国家重点实验室(成都理工大学),四川 成都 610059;
2. 成都理工大学地质工程国家级实验教学示范中心,四川 成都 610059


关键词:动三轴试验;磷石膏;偏压固结;动模量;阻尼比


摘要:

近年来,磷石膏废渣的生产和堆积迅速增长,给库区安全以及环境带来不小的隐患。该文利用英国GDS公司的GDS-DYNTTS型微机控制振动三轴试验系统,对杨家箐磷石膏堆场库区不同取土深度下的磷石膏废渣进行动力特性试验,主要针对其在围压较大、偏压固结条件下的动弹性模量Ed、阻尼比λ进行较详细的研究。试验结果表明:密度相同条件下,动弹性模量随着固结比和围压的增加而变大,且在动应变εd增长初期曲线变化率不大,εd超过0.01%后动弹性模量会迅速减小,再逐渐趋于平缓;利用Kondner模型发现最大动弹性模量倒数和动应变的曲线呈较好的线性关系;对动模量比(Ed/Ed0)曲线进行归一化分析,可以得出动模量与动应变的变化趋势,并且根据Darendeli模型对磷石膏动模量比的衰变阶段进行划分;利用最小二乘法对阻尼比与动弹性模量比λ- Ed/Ed0分布进行拟合,得到归一性较好的经验模型曲线。


Experimental study on dynamic modulus and damping ratio of phosphogypsum
CAI Guojun1,2, WEI Junren1,2, YANG Senlin1,2, PU Hong1,2, LI Lin1,2
1. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection(Chengdu University of Technology), Chengdu 610059, China;
2. National Geological Engineering Experimental Teaching Demonstration Center of Chengdu University of Technology, Chengdu 610059, China
Abstract: Recent years, the production and accumulation of phosphogypsum waste residue have multiplied, which has brought great hidden trouble to the safety of reservoir area and environment.In this paper, the dynamic characteristics of the phosphogypsum waste residue from Yangjiaqing phosphogypsum storage yard at different depths are tested by GDS-DYNTTS microcomputer controlled vibration triaxial test system. The dynamic elastic modulus, Ed and damping ratio λ of the waste residue are studied in detail under the condition of large confining pressure and bias pressure consolidation. The experimental results show that under the same density, the dynamic elastic modulus increases with the increase of consolidation ratio and confining pressure, and the change rate of dynamic strain εd curve is little at the beginning of the increase, and the dynamic elastic modulus decreases rapidly after εd exceeds 0.01%, and then gradually becomes flat. Using Kondner's model, it is found that the inverse of the maximum dynamic elastic modulus has a good linear relationship with the dynamic strain curve. The dynamic modulus ratio (Ed/Ed0) curve was normalized to obtain the variation trend of the dynamic modulus and dynamic strain, and the decay stages of phosphogypsum dynamic modulus ratio were divided according to Darendeli's model. The least square method is used to fit the damping ratio and the λ-Ed/Ed0 distribution of dynamic elastic modulus ratio, and the empirical model curve with good normality is obtained.
Keywords: dynamic triaxial test;phosphogypsum;bias consolidation;dynamic modulus;damping ratio
2024, 50(5):11-18  收稿日期: 2022-02-20;收到修改稿日期: 2022-05-06
基金项目: 国家自然科学基金(41202209,41977255);国家重点实验室自主课题(SKLGP2019Z017);四川省科技计划(2019YJ0403)
作者简介: 蔡国军(1982-),男,江西抚州市人,高级实验师,博士,主要从事地质工程和岩土工程方面教学与科研工作。
参考文献
[1] 陈秋松, 张琦, 齐冲冲, 等. 磷石膏充填体强度和浸出毒性的温变规律[J]. 中国有色金属学报, 2021, 31(4): 1084-1095
CHEN Q S, ZHANG Q, QI C C, et al. Temperature-depending characteristics of strength and leaching toxicity of phosphogympsum-based cemented paste backfill[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(4): 1084-1095
[2] 张利珍, 吕子虎, 张永兴, 等. 磷石膏提质降杂实验研究[J]. 无机盐工业, 2021, 53(6): 171-173
ZHANG L Z, LÜ Z H, ZHANG Y X, et al. Experimental study on improving quality and reducing impurity of phosphogypsum[J]. Inorganic Chemicals Industry, 2021, 53(6): 171-173
[3] 索崇娴, 曹洪雨, 曹家玮, 等. 赤泥-电石渣-磷石膏固化铜污染土性能[J]. 环境科学学报, 2021, 41 (11): 4686-4693.
SUO C X, CAO H Y, CAO J W, et al. Performance of red mud-calcium carbide residue-phosphogypsum solidified copper contaminated soil[J]. Acta Scientiae Circumstantiae, 2021, 41 (11): 4686-4693.
[4] 褚学伟, 许模, 王中美. 某磷石膏尾矿库堆积坝渗透稳定性分析[J]. 工程地质学报, 2016, 24(4): 661-667
CHU X W, XU M, WANG Z M. Stability analysis of seepage on the accumulation dam of a phosphogypsum tailings[J]. Journal of Engineering Geology, 2016, 24(4): 661-667
[5] 张婷, 谭凡, 杨哲. 尾矿粉土动力变形特性试验研究[J]. 长江科学院院报, 2020, 37(12): 146-151
[6] 杨安银, 王光进, 杨春和, 等. 坝体动力抗震及尾矿动力特性分析[J]. 中国安全生产科学技术, 2019, 15(4): 122-127
YANG A Y, WANG G J, YANG C H, et al. Dynamic seismic analysis of dam body and analysis of dynamic characteristics of tailings[J]. Journal of Safety Science and Technology, 2019, 15(4): 122-127
[7] 米占宽, 饶徐生, 储学群, 等. 沉积磷石膏的物理力学特性试验研究[J]. 岩土工程学报, 2015, 37(3): 470-478
MI Z K, RAO X S, CHU X Q, et al. Physico-mechanical properties of deposition phosphogypsum[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(3): 470-478
[8] 魏作安, 路停, 李世龙, 等. 磷石膏物理力学性质的试验研究[J]. 非金属矿, 2020, 43(2): 34-37
WEI Z A, LU T, LI S L, et al. Experimental study on physical and mechanical properties of phosphogypsum[J]. Non-Metallic Mines, 2020, 43(2): 34-37
[9] 路停, 魏作安, 王文松, 等. 磷石膏的动力学特性试验研究[J]. 振动与冲击, 2020, 39(14): 264-271
LU T, WEI Z A, WANG W S, et al. Experimental study on the dynamic characteristics of phosphogypsum[J]. Journal of Vibration and Shock, 2020, 39(14): 264-271
[10] 李宝平, 杨倩, 张玉, 等. 初始固结应力对平面应变黄土剪切破坏特性影响[J]. 水文地质工程地质, 2020, 47(5): 92-99
LI B P, YANG Q, ZHANG Y, et al. Effect of initial solidification stress on shear failure characteristics of loess under the plane strain condition[J]. Hydrogeology and Engineering Geology, 2020, 47(5): 92-99
[11] 黄兴建, 付小敏, 沈忠, 等. 三轴循环荷载下岩石动态特性参数研究[J]. 中国测试, 2016, 42(7): 117-122
HUANG X J, FU X M, SHEN Z, et al. Study on dynamic characteristic parameters of rock under triaxial cyclic loading[J]. China Measurement & Test, 2016, 42(7): 117-122
[12] 张珂, 姚小平. 土工格栅-粗粒土界面考虑尺寸效应直剪试验研究[J]. 中国测试, 2021, 47(6): 51-56
ZHANG K, YAO X P. Research on direct shear test of geogrid coarse grained soil interface considering effect of aperture ratio[J]. China Measurement & Test, 2021, 47(6): 51-56
[13] 荣笛, 孟陆波. 三轴循环荷载下饱和板岩的滞后特性研究[J]. 中国测试, 2021, 47(6): 57-62
RONG D, MENG L B. Study on hysteresis characteristics of saturated slate under triaxial cyclic load[J]. China Measurement & Test, 2021, 47(6): 57-62
[14] JAVDANIAN H, JAFARIAN Y. Dynamic shear stiffness and damping ratio of marine calcareous and siliceous sands[J]. Geo-Mar Lett, 2018, 38: 315-322
[15] 徐雪源, 徐玉中, 陈桂松, 等. 工业废料磷石膏的工程特性试验研究[J]. 岩石力学与工程学报, 2004(12): 2096-2099
XU X Y, XU Y Z, CHEN G S, et al. Testing study on engineering characteristics of phosphogypsum[J]. Chinese Journal of Rock Mechanics and Engineering, 2004(12): 2096-2099
[16] HARDIN B O, DRNEVICH V P. Shear modulus and damping in soils: Design equations and curves[J]. ASCE Journal of the Soil Mechanics and Foundations Division, 1972, 98(SM7): 667-692
[17] 庄心善, 赵汉文, 王俊翔, 等. 合肥膨胀土动弹性模量与阻尼比试验研究[J]. 浙江大学学报(工学版), 2020, 54(4): 759-766
ZHUANG X S, ZHAO H W, WANG J X, et al. Experimental study of dynamic elastic modulus and damping ratio of expansive soil in Hefei[J]. Journal of Zhejiang University(Engineering Science), 2020, 54(4): 759-766
[18] DARENDELI M B. Development of a new family of normalized moduli reduction and material damping curves [D]. Austin: University of Texas at Austin, 2001.
[19] 谢定义. 土动力学[M]. 北京: 高等教育出版社, 2011: 141-149.
[20] 郜晋伟, 孟立新, 李小明, 等. 基于最小二乘圆拟合法的三轴转台垂直度误差测试[J]. 中国测试, 2020, 46;(4): 123-129
GAO J W, MENG L X, LI X M, et al. The verticality error test of three-axis turntable based on least square circle fitting method[J]. China Measurement & Test, 2020, 46;(4): 123-129
[21] 余湘娟, 吴克雄, 高磊. 某尾矿库坝基粉砂动力特性试验[J]. 水利水运工程学报, 2016(2): 11-16
XU X J, WU K X, GAO L. Experimental studies on dynamic characteristics of silty sand for tailing dam foundation[J]. Hydro-Science and Engineering, 2016(2): 11-16
[22] 尹光志, 王文松, 魏作安, 等. 小打鹅尾矿库筑坝尾矿的动力学特性试验研究[J]. 岩石力学与工程学报, 2017, 36(S1): 3121-3130
YIN Z G, WANG W S, WEI Z A, et al. Experimental study on the dynamic characteristics of embankment tailings from Xiaodae tailings pond[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(S1): 3121-3130