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申强利 ， 田明磊

 

（河南省地质局生态环境地质服务中心 ，郑州 450053)

摘   要 ：针对三维地质模型勘测填土边坡稳定性敏感度差 、稳固性系数计算不准确的问题 ，研究基于土体振动规律的建筑场地填土边坡稳固性勘察技术。根据边坡土体振动加速度时程曲线建立模型 ，分析振动规律下土体与振动波的动力响应关系和边坡破坏模式 ，评价填土边坡稳定性。结果表明：本文方法所获得的振动波感应 、位移勘察检测结果与实际情况一致 ，计算边坡稳固性系数为 3 . 5 ,  与实际误差不超过 0. 5 ；边坡稳定性稳固性平均系数为 2. 1 ,  随着振动波次数增加明显下降 ；边坡稳固性系数为 1 . 6 ,  动波次数达到 2 000 次时降到 0. 8 ,说明该研究方法对边坡位移及稳固性系数分析更准确 ，可行有效。

关键词：土体振动规律 ；填土边坡 ；稳固性勘察 ；PGA 放大系数 ；稳固性系数

中图分类号：TN23          

 文献标志码：A           

文章编号： 1005- 8249   (2025)  04- 0095- 05

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .04.018

 

SHEN Qiangli ,  TIAN Minglei

(  Ecological  Environment Geological Service Center of Henan Provincial Geological Bureau ,  Zhengzhou 450053 , China  )

Abstract :  To address the issues of low sensitivity in stability analysis and inaccurate calculation of stability coefficients for filled soil slopes using three - dimensional geological models , study proposes a site investigation technique for filled soil slope stability based on  soil  vibration dynamics .  By establishing a model  derived from the  acceleration time -  history curve  of  slope soil vibration ,  we analyze the dynamic response relationship between the soil and vibration waves under vibrational loading , as well as the slope failure modes , to evaluate the stability of filled soil slopes . The  results  show that  the vibration wave induction and displacement  detection  results  obtained  using  the  proposed  method  align  with  actual  conditions; The calculated stability coefficient was 3 . 5 , with  an  error not exceeding 0. 5  compared  to  the  actual  value; The  average  stability  coefficient was 2. 1 , showing a significant decrease with increasing vibration wave cycles;  When the stability coefficient reached  1 . 6 , it  dropped  to 0. 8  after  2 000 vibration cycles .  This demonstrates that  the proposed  method  provides  more  accurate  analysis  of  slope displacement and stability coefficients , proving it to be feasible and effective .

Key words :  soil vibration law;  filling slope;  stability survey;  PGA amplification coefficient;  stability coefficient

作者简介： 申强利  (1982—) ,   男 ，本科 ， 工程师 ，研究方向 ：岩土工程 、工程地质 、水文地质 、工程环境影响评价等。

收稿日期：2023 - 07 - 06