Reason Analysis for the Difference between Measured and Calculated Self-weight Collapsibility of the Loess

WU Shuang; GAO Yuguang; ZHAO Quanli; LIANG Xiaodan

Northwestern Geology > 2019 > 52(4): 263-269.

WU Shuang, GAO Yuguang, ZHAO Quanli, et al. Reason Analysis for the Difference between Measured and Calculated Self-weight Collapsibility of the Loess[J]. Northwestern Geology, 2019, 52(4): 263-269.

Citation:

PDF (946 KB)

Reason Analysis for the Difference between Measured and Calculated Self-weight Collapsibility of the Loess

1. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China;
2. Institute of Geotechnical Engineering, Gansu Academy of Building Research, Lanzhou 730000, Gansu, China;
3. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China

More Information

Received Date: December 26, 2018
Revised Date: March 25, 2019
Available Online: July 28, 2022
Published Date: December 04, 2019

Graphical Abstract

Abstract

Abstract

A large-scale field water immersion test has been carried out in Heping Town, Lanzhou, the self-weight collapsibility of the site has been measured in this paper, and the amount of collapsibility has been calculated by using the experimental data. The influence of immersion time and infiltration depth must be considered in the field water immersion test. When the wetting peak does not reach the bottom of collapsible soil, there will be a large part of residual collapsibility, which underestimates the actual amount of collapsibility. In this field immersion test, the depth of collapsible soil layer is 24m, the depth of wetting peak is about 12m, and the depth of wetting peak is about 12m. According to the estimation of average infiltration rate, it will take more than 120 days to reach the bottom of collapsible soil layer. Under the condition of full immersion of collapsible soil layer, the measured value of large thickness collapsible loess in Lanzhou area is much larger than the calculated value, and their ratio is about 2.0, which is greater than the correction coefficient of 1.5 given in the investigation specification. In conclusion, in the field immersion test, in addition to determining the landform unit of the test site and the thickness of the wet soil layer, a reasonable soaking time must be given in order to fully wet the collapsible soil layer. After flooding, the depth of wetting peak should be measured in time to calculate the actual collapsing amount of soil layer in order to obtain a more reasonable correction coefficient.
- soil mechanics,
- sandy loess,
- collapsibility,
- field water immersion,
- water content,
- Heping Town

FullText(HTML)

References (36)

References

中华人民共和国建设部. GB 50025-2004,湿陷性黄土地区建筑规范[S]. 北京:中国建筑工业出版社,2004.

Ministry of Construction of the People's Republic of China. GB 50025-2004 Code for BuildingConstruction in Collapsible Loess Regions[S]. Bingjing:China Architecture and Building Press, 2004.

冯连昌,郑晏武.中国湿陷性黄土[M].中国铁道出版社,1982.

FENG Lianchang, ZHENG Yanwu. Chinese collapsible loess[M]. China Railway Publishing House, 1982.

孙建中,王兰民,门玉明,等.黄土学(中篇)[M].西安:西安地图出版社,2013.

SUN Jianzhong. WANG Lanmin, MEN Yuming,et al. Loess. Middle length. Loess geotechnical engineering[M]. Xi'an Cartographic Publishing House, 2013.

李大展,何颐华,隋国秀. Q2黄土大面积浸水试验研究[J].岩土工程学报,1993,15(2):111.

LI Dazhan, HE Yihua SUI Guoxiu. Experimental study on large area soaking of Q2 Loess[J]. Journal of Geotechnical Engineering,1993,15(2):111.

李萍, 李同录, 王阿丹, 等. 黄土中水分迁移规律现场试验研究[J]. 岩土力学, 2013, 05:1331-1339.

LI Ping, LI Tonglu, WANG Adan, et al. Field experimental study on water movement in Loess[J].Rock-soil Mechanics,2013.05:1331-1339.

罗宇生.宝鸡第二发电厂大面积试坑浸水试验报告[R]. 西安:西北电力设计院, 1994.

LUO Yusheng. Experiment report on large area test pit in Baoji No.2 Power Plant[R]. Xi'an:North West Electric Power Design Institute,1994.

黄雪峰.大厚度自重湿陷性黄土的湿陷变形特征、地基处理方法和桩基承载性状研究[D]. 重庆:后勤工程学院, 2007.

HUANG Xuefeng. Study on collapsibility deformation characteristics, foundation treatment methods and bearing behavior of pile foundation of large-thickness Self-Gravity Collapsible Loess[D]. Chongqing:School of Logistics Engineering,2007.

马侃彦,张继文,刘争宏,等.自重湿陷性黄土场地的试坑浸水试验[J].勘察科学技术,2009,(5):33-36.

MA Kanyan, ZHANG Jiwen, LIU Zhenghong, el at. Pit immersion test of collapsible loess site with gravity[J]. Reconnaissance Science and Technology,2009,(5):33-36.

杨庆义.湿陷性黄土现场浸水试验研究[J].水电能源科学,2011,29(6):58-60.

YANG Qingyi. Experimental study on in-situ soaking of collapsible loess[J]. Hydropower and Energy Science,2011,29(6):58-60.

王小军,米维军,熊治文,等.郑西客运专线黄土地基湿陷性现场浸水试验研究[J].铁道学报,2012,34(1):83-90.

WANG Xiaojun, MI Weijun, XIONG Zhiwen, et al. Experimental study on collapsibility of loess foundation of Zhengxi passenger dedicated line in situ[J]. Journal of Railway,2012,34(1):83-90.

王延辉, 张希宏,袁勤刚.大厚度黄土自重湿陷性试验分析研究[J].勘察科学技术,2013,(3):5-8.

WANG Yanhui, ZHANG Xihong, YUAN Qingang. Experimental analysis and study on collapsibility of loess with large thickness[J]. Reconnaissance Science and Technology,2013,(3):5-8.

武小鹏.基于试坑浸水试验的大厚度黄土湿陷及渗透特性研究[D]. 兰州:兰州大学, 2016.

WU Xiaopeng. Study on collapsibility and permeability of loess with large thickness based on pit soaking test[D]. Lanzhou:Lanzhou University,2016.

杨生彬.兰州某工程黄土湿陷性室内与现场试验对比分析[A].第十五届全国工程物探与岩土工程测试学术大会论文集[C].2017:305-310.

YANG Shengbin. Comparative analysis of loess collapsibility between laboratory and field test in Lanzhou project[A]. Proceedings of The 15th National Conference on Engineering Geophysical Exploration and Geotechnical Engineering Testing[C]. 2017:305-310.

邵生俊,李骏,李国良,等.大厚度湿陷性黄土隧道现场浸水试验研究[J]. 岩土工程学报,2018,40(8):1395-1404.

SHAO Shengjun, LI Jun, LI Guoliang, et al. In-situ immersion test of collapsible loess tunnel with large thickness[J]. Journal of Geotechnical Engineering,2018,40(8):1395-1404.2017:305-310.

黄雪峰, 张广平, 姚志华, 等. 大厚度自重湿陷性黄土湿陷变形特性水分入渗规律及地基处理方法研究[J]. 岩土力学, 2011, 32(增刊2):100-108.

HUANG Xuefeng, ZHANG Guangping, YAO Zhihua, et al. Research on deformation, permeability regularity and foundation treatment method of dead-weight collapse loess with heavy section[J]. Rock and Soil Mechanics, 2011, 32(Supp. 2):100-108.

姚志华,黄雪峰,陈正汉,等.兰州地区大厚度自重湿陷性黄土场地浸水试验综合观测研究[J]. 岩土工程学报,2012,34(1):65-74.

YAO Zhihua, HUANG Xuefeng, CHEN Zhenghan, et al. Comprehensive observation and study on soaking test of heavy thickness collapsible loess site in Lanzhou area[J]. Journal of Geotechnical Engineering, 2012,34(1):65-74.

姚志华,黄雪峰,陈正汉,等.关于黄土湿陷性评价和剩余湿陷量的新认识[J]. 岩土力学,2014, 35(4):998-1006.

YAO Zhihua, HUANG Xuefeng, CHEN Zhenghan, et al. A new understanding of the evaluation of loess collapsibility and the amount of residual collapsibility[J]. Rock-soil Mechanics,2014,35(4):998-1006.

XIE, W. L., LI, P., VANAPALLI, S. K., & Wang, J. D. (2018). Prediction of The Wetting-induced Collapse Behavior Using the Soil-water Characteristic Curve. Journal of Asian Earth Sciences, 151, 259-268. (in Portuguese)

PEREIRA, J. H., & FREDLUND, D. G. (2000). Volume change behavior of collapsible compacted gneiss soil. Journal of Geotechnical and Geo-environmental engineering, 126(10), 907-916.

Cited By

Get Citation

PDF

XML

Article views (1757) PDF downloads (1678)

Turn off MathJax

Article Contents

Abstract

References

	CHEN Yangyang, DUAN Jun, XU Gang, QIAN Zhuangzhi, YANG Tao, LIU Juntai. 2024: Geochemical Characteristics and Tectonic Significance of Late Triassic Lamprophyre in the Beishan Region, Gansu Province. Northwestern Geology, 57(6): 78-94. DOI: 10.12401/j.nwg.2024043
	WANG Lei, YANG Jianguo, WANG Xiaohong, QI Qi, XIE Xie. 2017: SHRIMP Zircon U-Pb Age of the Dashantounan Granodioritein from Beishan Mountains in Gansu Province and its Signification. Northwestern Geology, 50(4): 41-50.
	LIANG Guobing, DING Saping, LI Zuochen, LI Ruibao, WANG Meng, CHEN Youxin, PEI Xianzhi. 2017: Geochronology and Geochemistry of Early Devonian-Late Silurian Mylonitized Quartz Diorites from the Southern Xiaoxigong in the Beishan Aere of Gansu Province and Their Geologic Implications. Northwestern Geology, 50(1): 249-260.
	WANG Weiwei, JIANG Xiudao, YANG Zhenxi, CAO Baidi. 2015: Geological and Geochemical Characteristics and Genesis of Langwashan Iron Deposit in Beishan, Gansu Province. Northwestern Geology, 48(1): 179-190.
	GUO Xiaobao, YU Jiyuan, XIAO Peixi. 2015: Study on Ore-forming Fluid Inclusions and Geological Characteristics of the Gongpoquan Porphyry Copper Deposit in Beishan, Gansu Province. Northwestern Geology, 48(1): 91-100.
	LIU Dui-fu, WANG Hai-feng, CHEN Yu-feng, HE Zhi-zu, LI Lin. 2011: Characteristics of Tungsten & Molybdenum Geochemical Anomalies and Their Ore-Forming Regularity in Gansu Beishan and Its Adjacent Area. Northwestern Geology, 44(4): 58-66.
	LIU Ming-qiang, GONG Quan-sheng. 2003: On metamorphic core complex of Lebaquan in Beishan area, Gansu. Northwestern Geology, 36(2): 30-34.
	GONG Quan-sheng, LIU Ming-qiang, LI Hai-ling, LIANG Ming-hong, DAI Wen-jun. 2002: The type and basic characteristics of Beishan orogenic belt, Gansu. Northwestern Geology, 35(3): 28-34.
	LIU Ming-qiang, DANG Yin-ye, GONG Quan-sheng. 2002: The feature of Pingtoushan thrust-nappe structure in Beishan, Gansu. Northwestern Geology, 35(1): 22-27.
	REN Bing-chen, HE Shi-ping, YAO Wen-guang, FU Li-pu. 2001: Rb-Sr isotope age of Niuquanzi ophiolite and its tectonic significance in Beishan district, Gansu. Northwestern Geology, 34(2): 21-27.

Reason Analysis for the Difference between Measured and Calculated Self-weight Collapsibility of the Loess

Abstract

References

Related Articles

Catalog

Reason Analysis for the Difference between Measured and Calculated Self-weight Collapsibility of the Loess

Abstract

References

Related Articles

Catalog

Export File

Citation

Format

Content