Instability mechanism and reinforcement effects of expansive soil channel slopes of Yangtze River to Huaihe River Diversion Project

WANG Lina; SUN Hui; LIU Jun; QIU Jinwei; LI Congan

doi:10.11779/CJGE2023S10019

Volume 45 Issue S1

Turn off MathJax

Article Contents

Abstract

References

Chinese Journal of Geotechnical Engineering > 2023 > 45(S1): 136-139, 175. > DOI: 10.11779/CJGE2023S10019

WANG Lina, SUN Hui, LIU Jun, QIU Jinwei, LI Congan. Instability mechanism and reinforcement effects of expansive soil channel slopes of Yangtze River to Huaihe River Diversion Project[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S1): 136-139, 175. DOI: 10.11779/CJGE2023S10019

Citation:

PDF (1989 KB)

Instability mechanism and reinforcement effects of expansive soil channel slopes of Yangtze River to Huaihe River Diversion Project

1.
Anhui Provincial Group Limited for Yangtze-to-Huaihe Water Diversion, Hefei 230000, China
2.
Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources, Yangtze River Scientific Research Institute, Wuhan 430010, China

More Information

Received Date: July 05, 2023
Available Online: November 23, 2023

Graphical Abstract

Abstract

Abstract

The expansive soil is a kind of special soil that absorbs water, expands and softens, and shrinks and cracks after losing water. It is often called disastrous soil in engineering circles. Treatment of the expansive soil channel slopes is one of the main technical problems of the Yangtze River to Huaihe River Diversion Project. The instability mechanism and causes of the expansive soil channel slopes in typical section of the Yangtze River to Huaihe River Diversion Project are analyzed. The observation windows are set up to observe the fissures of the channel slopes. The technology of cement-modified soil replacement, reinforced anchor rod and GFRP-reinforced anchor rod to reinforce the channel slopes is used. The design scheme and special construction technology of cement-soil replacement and reinforcement of the channel slopes with anchor rod are introduced. The stress changes of the two anchor bolts during the water injection period and the water level stability period are monitored by using a stress meter, and an automatic monitoring system is used to monitor the deformation of the channel slopes after reinforcement. The monitoring results show that the maximum displacement of the slope strengthened by reinforced anchor rod is 1.03 mm, and the displacement of GFRP anchor rod is 1.96 mm. The stress of anchor rod increases gradually during the water injection period and tends to be stable during the water level stability period, and it decreases gradually during the precipitation period. The displacement of rock and soil in the deep layer of the channel bottom and slope is very small, which indicates that the reinforcement effects of the channel slopes are good and there is no obvious sliding surface.
- Divert the Yangtze River to the Huaihe River,
- expansive soil channel slope,
- reinforcement,
- anchor rod,
- on-site monitoring

FullText(HTML)

References (8)

References

[1]	龚壁卫, 吴宏伟, 包承纲, 等. 膨胀土渠坡降雨入渗现场试验研究[J]. 长江科学院院报, 2002, 19(增刊1): 94-97. https://www.cnki.com.cn/Article/CJFDTOTAL-CJKB2002S1025.htm GONG Biwei, NG C W W, BAO Chenggang, et al. Field study of the effects of rainfall infiltration on channel slope of expansive soil[J]. Journal of Yangtze River Scientific Research Institute, 2002, 19(S1): 94-97. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-CJKB2002S1025.htm
[2]	程展林, 龚壁卫. 膨胀土边坡[M]. 北京: 科学出版社, 2015. CHENG Zhanlin, GONG Biwei. Expansive Soil Slope[M]. Beijing: Science Press, 2015. (in Chinese)
[3]	胡波, 龚壁卫, 程展林. 南阳膨胀土裂隙面强度试验研究[J]. 岩土力学, 2012, 33(10): 2942-2946. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201210011.htm HU Bo, GONG Biwei, CHENG Zhanlin. Test study of shear strength of fissure-plane in Nanyang expansive soil[J]. Rock and Soil Mechanics, 2012, 33(10): 2942-2946. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201210011.htm
[4]	孙慧, 徐晗, 胡波, 等. 裂隙产状对膨胀土边坡稳定性的影响研究[J]. 人民长江, 2012, 43(21): 49-51. https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE201221015.htm SUN Hui, XU Han, HU Bo, et al. Study on influence of fissure occurrence on stability of expansive soil slope[J]. Yangtze River, 2012, 43(21): 49-51. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-RIVE201221015.htm
[5]	龚壁卫, 程展林, 胡波, 等. 膨胀土裂隙的工程特性研究[J]. 岩土力学, 2014, 35(7): 1825-1830, 1836. https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201407002.htm GONG Biwei, CHENG Zhanlin, HU Bo, et al. Research on engineering properties of fissures in expansive soil[J]. Rock and Soil Mechanics, 2014, 35(7): 1825-1830, 1836. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YTLX201407002.htm
[6]	陈善雄, 戴张俊, 陆定杰, 等. 考虑裂隙分布及强度的膨胀土边坡稳定性分析[J]. 水利学报, 2014, 45(12): 1442-1449. https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201412007.htm CHEN Shanxiong, DAI Zhangjun, LU Dingjie, et al. Stability analysis considering fracture distribution and strength for expansive soil slope[J]. Journal of Hydraulic Engineering, 2014, 45(12): 1442-1449. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-SLXB201412007.htm
[7]	程展林, 李青云, 郭熙灵, 等. 膨胀土边坡稳定性研究[J]. 长江科学院院报, 2011, 28(10): 102-111. https://www.cnki.com.cn/Article/CJFDTOTAL-CJKB201110019.htm CHENG Zhanlin, LI Qingyun, GUO Xiling, et al. Study on the stability of expansive soil slope[J]. Journal of Yangtze River Scientific Research Institute, 2011, 28(10): 102-111. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-CJKB201110019.htm
[8]	姚海林, 郑少河, 葛修润, 等. 裂隙膨胀土边坡稳定性评价[J]. 岩石力学与工程学报, 2002, 21(增刊2): 2331-2335. https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2002S2009.htm YAO Hailin, ZHENG Shaohe, GE Xiurun, et al. Assessment on slope stability in cracking expansive soils[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(S2): 2331-2335. (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YSLX2002S2009.htm