EXPERIMENTAL STUDY ON THE VERTICAL SELF-WEIGHT STRESS DISTRIBUTION LAW OF SLOPE WITH GRANULAR MATERIALS UNDER DIFFERENT CONDITIONS
Keywords:Granular material, Self-weight stress, Slope topography, Slope height, Slope ratio, Distribution law
Topography is one of the important factors affecting the distribution of the self-weight stress field. However, granular materials are different from general continuum materials (such as fluids and solids). Only adopting the continuum theory research still has certain limitations, while the use of experimental methods can better reflect the actual stress state of the granular materials. Therefore, in order to further obtain the vertical self-weight stress distribution of single slope with granular materials, the indoor experimental study of quartz sand based on the point source method is carried out in this paper. The research results indicate that: The measured value of the vertical stress on the bottom surface of the quartz sand slope is generally smaller than the γh (Gravity × Buried depth) value of the corresponding point, and the closer the measuring point is to the slope top, the greater the difference between the test value and γh. Besides, the influence of slope heights and slope ratios on the vertical self-weight stress about slope with granular material is also analyzed. Stress depressions appear in some test conditions, that is, the measured stress peak on the bottom of the slope does not appear at the measuring point closest to the slope top. Whether there is a stress depression and the scope of the depression is mainly related to the slope height, while the slope ratio has little effect on it.
Guan, B. S., 2003. Key Points of tunnel engineering design. China Communication Publishing, Beijing.
Zhang, N., 2002. Study on the current crustal stress field in the rockmass. Master’s thesis, Zhejiang University, Hangzhou.
Xie, K. H, Hu, A. F., Liu, Y. M., 2004. On computation of overburden pressure and settlement for layered soil considering sedimentation. Chinese Journal of Rock Mechanics and Engineering, Vol. 23, 1585-1589.
Liu, Y. and Li, W., 2001. Gravitational stresses in parallel stratified rock mass. Rock and Soil Mechanics, Vol. 22: 63-66. https://doi.org/10.16285/j.rsm.2001.01.017
Liang, Y., 2008. The study of in situ stress and rock slope stability analysis in deep-incised valley. Ph.D thesis, Southwest Jiaotong University, Chengdu.
Savage, W. Z., 1993. Gravity-induced stresses near a vertical cliff. International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts, Vol. 30: 325-330. https://doi.org/10.1016/0148-9062(93)91716-V
Savage, W. Z., 1994. Gravity-induced stresses in finite slopes. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 31: 471- 483. https://doi.org/10.1016/0148-9062(94)90150-3
Yu, D. J., Zhu, W. S., Yong, M., et al., 2011. Initial geostress field characters in mountain with different slopes and its influence on underground projects. Rock and Soil Mechanics, Vol. 32: 609-613. https://doi.org/10.16285/j.rsm.2011.s1.060
Qi, S. W. and Wu, F. Q., 2011. Stresses field characteristics of a valley slope in high geo-stress area. Rock and Soil Mechanics, Vol. 32: 1460-1464. https://doi.org/10.16285/j.rsm.2011.05.019
Zhao, D. A., Chen, Z. M., Cai, X. L., et al., 2007. Analysis of distribution rule of geostress in China. Chinese Journal of rock mechanics and Engineering, 1265-1271.
Savage, W. Z, Swolfs, H. S, Powers, P. S., 1985. Gravitational stresses in long symmetric ridges and valleys. International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, Vol. 22: 291- 302. https://doi.org/10.1016/0148-9062(85)92061-3
Mctigue, D. F. and Mei, C. C., 1981. Gravity-induced stresses near topography of small slope. Journal of Geophysical Research Solid Earth, Vol. 86: 9268-9278. https://doi.org/10.1029/JB086iB10p09268
Mctigue, D. F and Mei, C. C., 1987. Gravity-induced stresses near axisymmetric topography of small slope. International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 11: 257-268.
Mandal, P. and Singh, R. N., 1991. Gravity induced near-surface stresses in long-symmetric ridge-valley systems. Journal of Earth System Science, Vol. 100: 267-280.
Wang, H. Y., Chen, S. M., Yan, Z. X., 2008. Principles of dynamic design of underground engineering. Chemical Industry Press, Beijing.
Vernay, M., Morvan, M., Breul, P., 2020. Experimental study on the influence of saturation degree on unstable behavior within granular material. European Journal of Environmental and Civil Engineering, Vol. 24: 1821-1839. https://doi.org/10.1080/19648189.2018.1488623
Wu, Q. X., Yan, L. Y., Yang, Z. X., 2021 Discrete element simulations of drained granular material response under multidirectional rotational shear. Computers and Geotechnics, Vol. 139: 104375(1-13) https://doi.org/10.1016/j.compgeo.2021.104375
Chen, W. B., Feng, W. Q., Yin, J. H., 2020. Effects of water content on resilient modulus of a granular material with high fines content. Construction and Building Materials, Vol. 236: 117542(1-14). https://doi.org/10.1016/j.conbuildmat.2019.117542
Sun, Q. C. and Wang, G. Q., 2009. Introduction to particle mechanics. Science Press, Beijing.
Luo, W. Z., 2020. Experimental study and analysis on stress arch effect in sand. Master’s thesis, South China University of Technology, Guangzhou.
Yao, Y. X, Li, S., He, C., et al, 2019. Analysis on pressure characteristic at bottom of sand heap with laboratory experiment and PFC2D numerical simulation. Journal of Engineering Geology, Vol. 27: 1281-1289. https://doi.org/10.13544/j.cnki.jeg.2018-294
How to Cite
Copyright (c) 2022 Stavební obzor - Civil Engineering Journal
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).