Statistical regularity of physical and mechanical indexes of secondary red clay in Chenggong District, Kunming

Authors

GAO Haiyan, Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, China
ZHANG Jiaming, Faculty of Civil Engineering and Mechanics, Kunming University of Science and Technology, Kunming 650500, ChinaFollow

Abstract

In order to analyze the statistical regularity of physical and mechanical indexes of secondary red clay in Chenggong District, Kunming, the index data of 275 groups of secondary red clay samples from 69 geotechnical investigation boreholes in Wujiaying area of Chenggong are taken as the research object. Based on the statistical analysis principle, the variation range, average value, standard deviation, coefficient of variation of 13 indexes and the correlation between indexes and depth are analyzed by SPSS statistical analysis software, and the physical and mechanical properties of secondary red clay are summarized. Then, the linear empirical formula between indexes is fitted, and the normal distribution regularity of indexes is tested by skewness and peak method. The results show that the secondary red clay has a large specific gravity of soil particle, low plastic limit and liquid limit, mainly in plastic state, high compressibility and low shear strength. The correlation between indexes and depth is not strong, and the discreteness of mechanical indexes is greater than that of physical indexes, while the index dispersion of secondary red clay is larger than that of primary red clay. The overall correlation between the indexes is weak, with the void ratio, compressibility and wet density, the internal friction angle and water content ratio negatively correlated, and the compression modulus, cohesion and wet density, the plasticity index and natural water content positively correlated. Only the wet density, void ratio and internal friction angle follow the normal distribution. The research results provide a reference for the geotechnical engineering design and the selection of geotechnical parameters in Chenggong District of Kunming, and offer a basis for the engineering disaster prevention and mitigation in the secondary red clay area.

Keywords

Chenggong District of Kunming, secondary red clay, physical and mechanical index, statistical analysis, correlation

DOI

10.3969/j.issn.1001-1986.2021.05.019

Recommended Citation

G Z. (2021) "Statistical regularity of physical and mechanical indexes of secondary red clay in Chenggong District, Kunming," Coal Geology & Exploration: Vol. 49: Iss. 5, Article 20.
DOI: 10.3969/j.issn.1001-1986.2021.05.019
Available at: https://cge.researchcommons.org/journal/vol49/iss5/20

Reference

[1] LI Gang, ZHANG Jinli, YANG Qing. Probabilistically statistical analysis on physic-mechanical indices for sediment soils[J]. Rock and Soil Mechanics, 2017, 38(12): 3565-3572. 李刚, 张金利, 杨庆. 不同成因沉积土物理力学指标概率统计分析[J]. 岩土力学, 2017, 38(12): 3565-3572.

[2] XIE Dingyi, CHEN Cunli, HU Zaiqiang. Experimental soil engineering[M]. Beijing: Higher Education Press, 2011. 谢定义, 陈存礼, 胡再强. 试验土工学[M]. 北京: 高等教育出版社, 2011.

[3] WU Linian, XIE Qiaoqin, FANG Yuyou. Correlation analysis of the physical-mechanical indexes of cohesive soil in Hefei area[J]. Hydrogeology and Engineering Geology, 2002, 29(4): 43-45. 吴礼年, 谢巧勤, 方玉友. 合肥地区粘性土物理力学指标的相关性分析[J]. 水文地质工程地质, 2002, 29(4): 43-45.

[4] SUN Ruhua, LI Wenping, LIANG Shuanghua. An exploration on statistical distribution regularity of great overburden clay physics and mechanics data in southwestern Shandong[J]. Coal Geology & Exploration, 2004, 32(3): 30-32. 孙如华, 李文平, 梁双华. 鲁西南地区大埋深粘性土力学指标统计分布规律研究[J]. 煤田地质与勘探, 2004, 32(3): 30-32.

[5] CHAI Shouxi, WANG Pei, WEI Li, et al. Effect of salt content on physical and hydrological properties of saline soil in inshore[J]. Coal Geology & Exploration, 2006, 34(6): 47-50. 柴寿喜, 王沛, 魏丽, 等. 含盐量对滨海盐渍土物理及水理性质的影响[J]. 煤田地质与勘探, 2006, 34(6): 47-50.

[6] LIU Yonghai, ZHU Xiangrong, WANG Wenjun. Engineering characteristics of typical mucky clay in Ningbo area[J]. Coal Geology & Exploration, 2007, 35(6): 30-33. 刘用海, 朱向荣, 王文军. 宁波地区典型淤泥质粘土工程特性[J]. 煤田地质与勘探, 2007, 35(6): 30-33.

[7] GAO Shengxiang, XU Qiang, MA Hongyu, et al. Study on slope stability and the effect of highfill on the mechanical properties of red clay foundation[J]. Coal Geology & Exploration, 2019, 47(4): 131-137. 高盛翔, 徐强, 马洪玉, 等. 高填方对红黏土地基力学性质影响及坡体稳定性[J]. 煤田地质与勘探, 2019, 47(4): 131-137.

[8] QU Rumin, MEI Shilong. Laterite and red clay[J]. Hydrogeology and Engineering Geology, 1987(3): 13-17. 屈儒敏, 梅世龙. 红土与红粘土[J]. 水文地质工程地质, 1987(3): 13-17.

[9] GAO Guorui. The distribution and geotechnical properties of loess soils, lateritic soils and clayey soils in China[J]. Engineering Geology, 1996, 42(1): 95-104.

[10] Ministry of Construction of the People's Republic of China. Code for investigation of geotechnical engineering: GB 50021-2001[S]. Beijing: China Architecture & Building Press, 2009. 中华人民共和国建设部. 岩土工程勘察规范: GB 50021-2001[S]. 北京: 中国建筑工业出版社, 2009.

[11] GUAN Jianchao. The analysis of a making-paper workshop's wall-cracks in a certain factory in Liuzhou City[J]. Journal of Guilin Institute of Technology, 1995, 15(1): 54-58. 关键超. 柳州某厂造纸车间墙裂原因分析[J]. 桂林工学院学报, 1995, 15(1): 54-58.

[12] WEI Fucai. Engineering geological properties and problems of Guilin laterite[J]. Journal of Jilin University(Earth Science Edition), 2005, 35(6): 775-781. 韦复才. 桂林红土的工程地质性质及其主要工程地质问题[J]. 吉林大学学报(地球科学版), 2005, 35(6): 775-781.

[13] JIN Ziyuan. The variational characteristic of engineering properties index of laterite clay in Kunming[J]. Journal of Yunnan Institute of Technology, 1989(2): 49-54. 金子袁. 昆明地区红粘土工程性质指标的变差特征[J]. 云南工学院学报, 1989(2): 49-54.

[14] SUN Xiwang, XU Yunlong, YANG Guoyue, et al. Shear strength characteristics of a compacted red clay in Kunming area[J]. Soil Engineering and Foundation, 2017, 31(4): 465-467. 孙希望, 徐运龙, 杨果岳, 等. 昆明地区压实红黏土抗剪强度特征研究[J]. 土工基础, 2017, 31(4): 465-467.

[15] ZHANG Huiying, ZHANG Yunshu, PENG Yulin, et al. Study on fundamental characteristics and infection mechanism of red clay in Kunming[J]. Journal of Yunnan Agricultural University, 2007, 22(4): 615-617. 张慧颖, 张云淑, 彭玉林, 等. 昆明红粘土的基本特征及工程效应影响机理的探讨[J]. 云南农业大学学报, 2007, 22(4): 615-617.

[16] HE Xiaomin, SU Hua, YAN Huihe, et al. Study on the engineering characteristics of red clay at Kunming new international airport[J]. Yangtze River, 2008, 39(24): 49-52. 何晓民, 苏华, 颜惠和, 等. 昆明新国际机场红粘土工程特性研究[J]. 人民长江, 2008, 39(24): 49-52.

[17] LI Guoxiang, KANG Jingwen. Analysis and research on engineering properties of Kunming red clay[J]. Journal of Geotechnical Investigation & Surveying, 2008(Sup. 1): 167-170. 李国祥, 康景文. 昆明红粘土工程特性分析与研究[J]. 工程勘察, 2008(增刊1): 167-170.

[18] YANG Yaochi, XU Shiguang, DONG Jiao. The analysis of the correlativity between fixed SPT counts and natural void ratio of the red clay in Chenggong new city, Kunming, Yunnan Province[J]. Science Technology and Engineering, 2012, 12(13): 3256-3258. 杨瑶池, 徐世光, 董佼. 云南省昆明市呈贡新区红黏土标贯击数与孔隙比之间的相关性分析[J]. 科学技术与工程, 2012, 12(13): 3256-3258.

[19] GIDIGASU M D. Laterite soil engineering-Pedogenesis and engineering principles[M]. Amsterdam: Elsevier Scientific Publishing Co., 1976.

[20] ZHANG Kegong, LIU Songyu. Soil Mechanics(3^rd Edition)[M]. Beijing: China Architecture & Building Press, 2010. 张克恭, 刘松玉. 土力学(第3版)[M]. 北京: 中国建筑工业出版社, 2010.

[21] ZHAO Yongchuan. Study on red clay characteristics in water conservancy project[J]. Resources Environment & Engineering, 2017, 31(4): 454-459. 赵永川. 水利枢纽工程中红黏土特性研究[J]. 资源环境与工程, 2017, 31(4): 454-459

[22] LIU Tao. Comparison of physical and mechanical properties of secondary red clay and primary red clay[J]. Technology and Enterprise, 2014(16): 400. 刘弢. 次生红粘土与原生红粘土的物理力学性质对比[J]. 科技与企业, 2014(16): 400.

[23] LIU Chun, BAI Shiwei, ZHAO Hongbo. Statistical regularity research of physical and mechanical indexes of clay[J]. Rock and Soil Mechanics, 2003, 24(Sup. 1): 180-184. 刘春, 白世伟, 赵洪波. 粘性土土性指标的统计规律研究[J]. 岩土力学, 2003, 24(增刊1): 180-184.

[24] YIN Lihua, WANG Xiaomou, ZHANG Liujun. Probabilistical distribution statistical analysis of Tianjin soft soil indices[J]. Rock and Soil Mechanics, 2010, 31(Sup. 2): 462-469. 尹利华, 王晓谋, 张留俊. 天津软土土性指标概率分布统计分析[J]. 岩土力学, 2010, 31(增刊2): 462-469.

[25] QU Ruofeng, XU Guangli, WANG Jinfeng, et al. Correlations of physical and mechanical properties of typical soft soils in Wuhan[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(Sup. 2): 113-119. 屈若枫, 徐光黎, 王金峰, 等. 武汉地区典型软土物理力学指标间的相关性研究[J]. 岩土工程学报, 2014, 36(增刊2): 113-119.

[26] CHEN Lihong, CHEN Zuyu, LIU Jinmei. Probability distribution of soil strength[J]. Rock and Soil Mechanics, 2005, 26(1): 37-40. 陈立宏, 陈祖煜, 刘金梅. 土体抗剪强度指标的概率分布类型研究[J]. 岩土力学, 2005, 26(1): 37-40.

[27] SHENG Zhou, XIE Shiqian, PAN Chengyi. Probability theory and mathematical statistics[M]. Beijing: Higher Education Press, 1979. 盛骤, 谢式千, 潘承毅. 概率论与数理统计[M]. 北京: 高等教育出版社, 1979.