Determination of shear strength parameters and stability analysis of waste disposal area using laboratory large-scale shear testing and engineering geologic analogy method
-
摘要:
目前工程实践中弃渣场抗剪强度参数主要采用工程地质类比法进行取值, 参数误差较大, 有必要采用多种方法对弃渣场抗剪强度参数进行综合取值研究。以某公路弃渣场为工程实例, 通过室内颗分试验确定弃渣场弃渣的颗粒级配, 在此基础上采用室内大型剪切试验及工程地质类比法综合确定该弃渣的抗剪强度参数, 并以此参数计算弃渣体的稳定性。计算结果表明, 弃渣体在天然工况条件下稳定性系数为1.369, 在暴雨工况条件下稳定性系数为1.083, 弃渣场在计算工况条件下处于基本稳定-稳定状态, 与现场巡查及监测结果基本一致。说明该弃渣抗剪强度参数取值比较合理准确, 可为公路弃渣场参数取值提供参考。
Abstract:The engineering geological classification method has been widely used for determining the shear strength parameters of waste disposal areas in engineering practice; however the calculation error is large.It is necessary to use various methods to comprehensively estiamte the shear strength parameters of the spoil field. Taking a road waste slag yard as an example, the particle size distribution of the slag in the waste disposal area is determined by laboratory particle grading testing, and on this basis, the shear strength of the waste slag is comprehensively determined by indoor large-scale shear testing and engineering geological analogy method parameters.The shear strength is used to perform the stability analysis of the slag body. The results show that the factor of safety of the slag body is 1.369 under natural working conditions and 1.083 under heavy rain conditions, respectively. Additionally, the monitoring results are consistent with the stability analysis, proving that the determination of the shear strength parameter of the slag is reasonable and accurate, and it can provide a reference for the parameter value of the highway waste disposal engineering.
-
图 1 弃渣场主剖面示意图
Figure 1. Schematic diagram of the principal profile of the waste disposal area
图 10 天然工况下弃渣场稳定性计算结果
Figure 10. Calculation results of the waste disposal area under natural working conditions
图 11 暴雨工况下弃渣场稳定性计算结果
Figure 11. Calculation results of the waste disposal area under heavy rain working conditions
图 13 弃渣场地表监测点累积位移-时间曲线
Figure 13. Cumulative displacement-time curves of surface monitoring points in the waste disposal area
图 14 弃渣场深部位移监测点累积位移-时间曲线
Figure 14. Cumulative displacement-time curves of deep displacement monitoring points in the waste disposal area
表 1 颗分试验结果
Table 1. Test results of the particle grading testing
颗粒组成(筛分法) 孔径/mm 60 40 20 10 5 2 小于该孔径质量分数/% 79.2 70.3 48.8 35 23.5 11.6 
下载: 导出CSV
表 2 类似弃渣体抗剪强度参数值
Table 2. Shear strength parameters of similar waste disposal areas
序号 弃渣场名称 c/kPa φ/(°) 天然 饱和 天然 饱和 1 安家岭露天矿内排土场 6.8 - 23.8 - 2 杭长客专白力坞隧道出口弃渣场 7 - 40 - 3 周家隧道出口弃渣场 8 4 35 32
下载: 导出CSV
表 3 弃渣抗剪强度综合取值
Table 3. Shear strength comprehensive values of the waste disposal
序号 取值 c/kPa φ/(°) 天然 饱和 天然 饱和 1 室内剪切试验 - 3~5 - 28~29 2 工程地质类比 6.8~8 4 23.8~40 32 3 综合取值 7 3 32 28
下载: 导出CSV
稳定状态 不稳定 欠稳定 基本稳定 稳定 稳定系数Fs Fs＜1.0 1.0≤Fs＜1.05 1.05≤Fs＜Ks Fs≥Ks 注：Fs为计算稳定性系数；Ks为安全系数
下载: 导出CSV
表 5 弃渣场稳定性评价结果
Table 5. Stability analyses of the waste disposal area
计算工况 稳定性系数Fs 控制标准 稳定性状态 天然工况 1.369 1.30 稳定 暴雨工况 1.083 1.15 基本稳定
下载: 导出CSV
-
[1] 姜景山, 刘汉龙, 程展林, 等. 密度和围压对粗粒土力学性质的影响[J]. 长江科学院院报, 2009, 26(8): 46-50. doi: 10.3969/j.issn.1001-5485.2009.08.011Jiang J S, Liu H L, Cheng Z L, et al. Influences of density and confining pressureon mechanical properties for coarse-grained soils[J]. Journal of Yangtze River Scientific Research Institute, 2009, 26(8): 46-50(in Chinese with English abstract). doi: 10.3969/j.issn.1001-5485.2009.08.011 [2] 彭凯, 朱俊高, 伍小玉, 等. 不同泥皮粗粒土与结构接触面力学特性试验[J]. 重庆大学学报, 2011, 34(1): 110-115. https://www.cnki.com.cn/Article/CJFDTOTAL-FIVE201101020.htmPeng K, Zhu J G, Wu X Y, et al. Experiments on influence of slurry kinds on mechanical behavior of interface between gavel and concrete[J]. Journal of Chongqing University, 2011, 34(1): 110-115(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-FIVE201101020.htm [3] 黄阳, 董洪凯, 李洪文. 用改进直剪仪研究粗粒土抗剪强度的尺寸效应[J]. 公路交通科技: 应用技术版, 2019, 15(6): 167-170. https://www.cnki.com.cn/Article/CJFDTOTAL-GLJJ201906053.htmHuang Y, Dong H K, Li H W. Study on the size effect of coarse-grained soil shear strength by improved direct shear apparatus[J]. Highway Traffic Technology: Application Technology Edition, 2019, 15(6): 167-170(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-GLJJ201906053.htm [4] Frossard E, Hu W, Dano C, et al. Rockfill shear strength evaluation: A rational method based on size effects[J]. Geotechnique, 2012, 62 (5): 415-427. doi: 10.1680/geot.10.P.079 [5] Leslie D D. Relationship between shear strength, gradation and indexproperties[C]//Anon. Proceedings of the 7th International Conference on Soil Mechanics and Foundation Engineering. [S.I. ]: Speciality Session, 1969: 212-222. [6] 曹志翔, 宋新伟, 赵素华, 等. 颗粒粒径对粗粒土抗剪强度影响的试验研究[J]. 高原农业, 2019, 3(3): 315-322. https://www.cnki.com.cn/Article/CJFDTOTAL-GYNY201903013.htmCao Z X, Song X W, Zhao S H, et al. Experimental study on influence of particle size on shear strength of coarse-grained soil[J]. Journal of Plateau Agriculture, 2019, 3(3): 315-322(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-GYNY201903013.htm [7] 沙曼, 赵成刚, 康凯. 试样尺寸及制样粒径大小对粗粒土三轴试验抗剪强度的影响[J]. 北京交通大学学报, 2014, 38(4): 133-136. https://www.cnki.com.cn/Article/CJFDTOTAL-BFJT201404024.htmSha M, Zhao C G, Kang K. Study on sample size and grain size influence on shear strength of coarse grained soil in triaxial test[J]. Journal of Beijing Jiaotong University, 2014, 38(4): 133-136(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-BFJT201404024.htm [8] 王家全, 武标, 邹红, 等. 土工格栅与粗粒土界面特性的大型直剪试验研究[J]. 广西科技大学学报, 2015, 26(3): 78-83. https://www.cnki.com.cn/Article/CJFDTOTAL-GXGX201503015.htmWang J Q, Wu B, Zou H, et al. Large direct shear test research of interface interaction characteristics of geo grid and coarse grained soil[J]. Journal of Guangxi University of Science and Technology, 2015, 26(3): 78-83(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-GXGX201503015.htm [9] 王林峰, 程平, 唐宁, 等. 深厚填土区碎石土抗剪性能及桩基力学特性分析[J]. 重庆交通大学学报: 自然科学版, 2022, 41(3): 79-86, 129. https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT202203012.htmWang L F, Cheng P, Tang N, et al. Shear resistance of gravel soil and the mechanical properties of pile foundation in Deep filling Area[J]. Journal of Chongqing Jiaotong University: Natural Science, 2022, 41(3): 79-86, 129(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-CQJT202203012.htm [10] 陈星宇, 苏立君, 张崇磊, 等. 不同干密度粗粒土抗剪强度特征试验研究[J]. 科学技术与工程, 2016, 16(10): 211-216. doi: 10.3969/j.issn.1671-1815.2016.10.042Wang X Y, Su L J, Zhang C L, et al. The stable study of underground tunnel foundation pitunder vehicular dynamic load[J]. Science Technology and Engineering, 2016, 16(10): 211-216(in Chinese with English abstract). doi: 10.3969/j.issn.1671-1815.2016.10.042 [11] 魏玉峰, 符文熹. 原生结构对天然粗粒土抗剪强度的影响研究[J]. 地质灾害与环境保护, 2017, 28(4): 58-60. doi: 10.3969/j.issn.1006-4362.2017.04.012Wei Y F, Fu W X. The effect of in-situ structure on shear strength of natural coarse- grained soil[J]. Journal of Ucological Hazards and Environment Preservation, 2017, 28(4): 58-60(in Chinese with English abstract). doi: 10.3969/j.issn.1006-4362.2017.04.012 [12] 刘平, 刘汉龙, 杨贵. 粗粒土与掺砾黏土接触面动单剪特性试验研究[J]. 土木工程学报, 2013, 46(9): 98-103. https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201309016.htmLiu P, Liu H L, Yang G. Cyclic simple-shear tests on mechanical behavior of interface between granular material and gravel-clay[J]. China Civil Engineering Journal, 2013, 46(9): 98-103(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-TMGC201309016.htm [13] 李远征, 魏玉峰, 雷壮, 等. 基于离散元法研究颗粒球度对粗粒土抗剪强度的影响[J]. 水资源与水工程学报, 2019, 30(4): 225-232. https://www.cnki.com.cn/Article/CJFDTOTAL-XBSZ201904035.htmLi Y Z, Wei Y F, Lei Z, et al. Research on the influence of particle sphericity on shear strength of coarse grained soil based on discrete element[J]. Journal of Water Resources & Water Engineering, 2019, 30(4): 225-232(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-XBSZ201904035.htm [14] 林成远, 唐辉明, 汪丁建, 等. 块石定向性特征对土-石混合体强度影响的数值模拟[J]. 地质科技通报, 2020, 39(5): 38-46. doi: 10.19509/j.cnki.dzkq.2020.0519Lin C Y, Tang H M, Wang D J, et al. Influence on the strength of soil-rock mixture made by the rock block orientation features based on numerical experiment[J]. Bulletin of Geological Science and Technology, 2020, 39(5): 38-46(in Chinese with English abstract). doi: 10.19509/j.cnki.dzkq.2020.0519 [15] 张晋梅, 张震, 李家春. 降雨条件下弃渣场边坡暂态饱和区分布及稳定性[J]. 人民长江, 2021, 52(6): 154-159. https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE202106026.htmZhang J M, Zhang Z, Li J C. Study on distribution and stability of transient saturated zone of slope in abandoned slag yard under rainfall condition[J]. Yangtze River, 2021, 52(6): 154-159(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE202106026.htm [16] 赵之举, 赵一桐. 边坡反算法确定粗粒土抗剪强度参数的应用[J]. 资源环境与工程, 2018, 32(3): 443-446. https://www.cnki.com.cn/Article/CJFDTOTAL-HBDK201803025.htmZhao Z J, Zhao Y T. Application of slope inverse algorithm to determine shear strength parameters of coarse-grained soil[J]. Resources Environment & Engineering, 2018, 32(3): 443-446(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-HBDK201803025.htm [17] 中华人民共和国住房与城乡建设部. 土工试验方法标准: GBT50123-2019[S]. 北京: 中国标准出版社, 2019.Ministry of Transport of the People's Republic of China. Standard for geotechnical testing method: GBT50123-2019[S]. Beijing: China Standards Press, 2019(in Chinese). [18] 许昌, 邓有燃, 刘如成, 等. 安家岭露天矿内排土场南帮边坡稳定性控制措施研究[J]. 露天采矿技术, 2012, 127(增刊1): 13-17. https://www.cnki.com.cn/Article/CJFDTOTAL-LTCM2012S1006.htmXu C, Deng Y R, Liu R C, et al. Study on stability control measures of south slope of inner Dump in Anjialing Open-pit Mine[J]. Open Pit Mining Technique, 2012, 127(S1): 13-17(in Chinese with English abstract). https://www.cnki.com.cn/Article/CJFDTOTAL-LTCM2012S1006.htm [19] 中华人民共和国住房与城乡建设部. 水土保持工程设计规范: GB51018-2014[S]. 北京: 中国标准出版社, 2014.Ministry of Transport of the People's Republic of China. Code for design of soil and water conservation engineering: GB51018-2014[S]. Beijing: China Standards Press, 2014(in Chinese). [20] 中华人民共和国住房与城乡建设部. 公路滑坡防治设计规范: JTG/T3334-2018[S]. 北京: 中国标准出版社, 2018.Ministry of Transport of the People's Republic of China. Specifications for design of highway landslide stabilization: JTG/T3334-2018[S]. Beijing: China Standards Press, 2018(in Chinese). [21] 中华人民共和国住房与城乡建设部. 建筑边坡工程技术规范: GB50330-2013[S]. 北京: 中国标准出版社, 2013.Ministry of Transport of the People's Republic of China. Technical code for construction slope engineering: GB50330-2013[S]. Beijing: China Standards Press, 2013(in Chinese). -
下载:
点击查看大图
计量
- 文章访问数: 399
- PDF下载量: 43
- 被引次数: 0
