Abstract：Research purposes: With the development of geophysical prospecting technology, it is more and more widely used in railway engineering geological prospecting, especially in difficult and complex mountainous areas and dense forest areas. Some railway projects have adopted a comprehensive prospecting mode based on geophysical exploration. However, geotechnical bearing capacity and other parameters are needed in engineering design, so it is necessary to study and solve the problems of refinement and quantification of geophysical exploration and providing geotechnical parameters. Taking clay as an example, this paper intends to establish a new method for determining foundation bearing capacity based on shear wave velocity. By studying the relationship between wave velocity and standard penetration of clay soil, the relational expression between wave velocity and standard penetration blow count is established, and the standard penetration blow count is obtained by calculating the measured shear wave velocity, and then the bearing capacity of foundation is determined. Research conclusions: (1) The model for determining foundation bearing capacity based on shear wave velocity established in this study is accurate and reliable, and it is an effective method to obtain the bearing capacity of foundation in the area without drilling holes. (2) When this method is applied in other areas, it should be analyzed in combination with the field data, instead of directly applying the formula in this study. (3) This method is not applicable to the area with frequent geological mutation where the stratum changes greatly, and conventional investigation is recommended. (4) The research results could be used in mountainous area with simple stratum structure, and the accuracy can meet the demand of preliminary railway design.
陈则连, 马元, 李志华. 波速确定地基承载力方法研究[J]. 铁道工程学报, 2022, 39(4): 17-19.
CHEN Zelian, MA Yuan, LI Zhihua. Research on the Method of Determining Foundation Bearing Capacity by Wave Velocity. Journal of Railway Engineering Society, 2022, 39(4): 17-19.
李瑞峰. 快速获得既有路基填筑土承载力方法研究[J]. 铁道工程学报, 2019(4): 4-7. Li Ruifeng. Research on the Method to Quickly Obtain the Bearing Capacity of the Filling Soil of Existing Roadbed [J]. Journal of Railway Engineering Society, 2019(4): 4-7.
[2]
Kovach R L, Anderson D L. Higher Mode Surface Waves and Their Bearing on the Structure of the Earth's Mantle[J]. Bulletin of the Seismological Society of America, 1964(1):161-182.
[3]
Beaty K S, Schmitt D R, Sacchi M. Simulated Annealing Inversion of Multimode Rayleigh Wave Dispersion Curves for Geological Structure[J]. Geophysical Journal International,2002(2):622-631.
[4]
赵硕九, 金钢燮, 汪利民. 瑞雷面波在多尺度勘探上的研究现状与展望[J]. 勘探地球物理进展, 2010(1):1-10. Zhao Shuojiu, Jin Gangxie, Wang Limin. Review of Rayleigh Wave Techniques in Survey of Different Scales and Its Future Prospects[J]. Progress in Exploration Geophysics, 2010(1):1-10.
[5]
李庆春, 邵广周, 刘金兰,等.瑞雷面波勘探的过去、现在和未来[J]. 地球科学与环境学报,2006(3):74-77.Li Qingchun, Shao Guangzhou, Liu Jinlan, etc. Past, Present and Future of Rayleigh Surface Wave Exploration[J]. Journal of Earth Sciences and Environment, 2006(3):74-77.
[6]
TB 10018—2018,铁路工程地质原位测试规程[S].TB 10018—2018,Code for In-situ Testing of Railway Engineering Geology [S].
2022, Vol. 39 
版权所有 © 2014 《铁道工程学报》编辑部