Based on the Drilling and High-density Resistivity Method to Research Landslide in the Permafrost Regions
In recent years, permafrost in north-eastern part of China is being severely degraded. Bei’an to Heihe expressway passed through the north-western part of the Lesser Khingan Range region. Stability of embankment in this region is being seriously affected landslide occurrence and the degradation of permafrosts. The expressway utilizes the original second-class highway to widen and expand, being restricted by the original location of the old road, some sections of new sub-grade are located at the toe of the landslides. The formation and development of the landslide at K178+530 section of the expressway is mainly affected by the topography, engineering geology, hydrology and climatic influences. Topography, loose stratum, active groundwater, intense freeze–thaw erosion and human engineering activities are inherent conditions and contributing factors affecting the stability of the slope. In order to study and analyze the landslide, geological drilling exploration and high-density resistivity method were employed to understand the failure mechanism of the landslide along the expressway. The results show that high-density resistivity technology and drilling exploration gave similar result near the landslide sliding surface; there is a significant difference between inside and outside the landslide soil resistivity values. When the landslide had not yet formed, the landslide resistivity value had no obvious stratification, and had no saltation phenomenon of the resistivity. After the landslide began to move, the resistivity value at the sliding surface location showed significant stratification, and the resistivity values of its upper and lower location were obviously different.
KeywordsLandslide Formation mechanism Drilling exploration High-density resistivity method
This work was financially supported by Heilongjiang Communications Department project and subtopic of the western communication science and technology project “Study on Sub-grade Stability Controlling Technology of Expressway Expansion Project Permafrost Melt and Landslides Sections”.
- Duan YH (1999) Basic characters of geo-hazards and its development trend in China. Quat Sci 19(3):208–216Google Scholar
- Gu TF, Wang JD, Lu X, Meng YL (2009) Characteristics and stability analysis of accumulations landslide No.3 in Tuoba of Southeast Tibet. J Nat DisGoogle Scholar
- He YX (1991) Application of D.C. Electric Sounding for the Permafrost Exploration along Xinjiang-Xizang Highway. J Glaciology GeocryologyGoogle Scholar
- Hu ZG, Shan W (2011) Application of geological drilling combined with high-density resistance in Island structure permafrost survey. The International Conference on Electronics, Communications and Control (ICECC2011)Google Scholar
- Hu RL, Wang SS (2010) Main feature and identification method of sliding-surfaces in soil and rock slopes. J Eng Geol 18(1):35–40Google Scholar
- Hu XW, Tang HM, Liu YR (2005) Verificatio verification of transfer coefficient method applied to landslide stability analysis by physical model test. Rock Soil Mech 26(1):63–66Google Scholar
- Li YH, Zhang XY, Cui ZJ et al (2002) Periodic coupling of debris flow active periods and climate periods during Quaternary. Quat Sci 22(4):340–347Google Scholar
- Li TL, Zhao JL, Li P (2003) Analysis on the characteristics and stability of the No. 2 Landslide of 102 Landslide Group on Sichuan-Tibet Highway. J CatastropholGoogle Scholar
- Liu LH, Zhu DY, Liu DF (2007) Discussion on multiple solutions of safety factor of a slope. Rock Soil Mech 28(8):1661–1664Google Scholar
- Yang T, Zhou DP, Ma HM et al (2010) Point safety factor method for stability analysis of landslide. Rock Soil Mech 31(3):971–975Google Scholar
- Zhu YS, Li HL, Cao NE et al (2007) Finite element method research on road slide stability analysis. J Highway Trans Res Develop 24(4):39–42Google Scholar