华南地震2026，Vol.46Issue(2)：109-114,6.DOI:10.13512/j.hndz.2026.02.14
复杂地质背景下公路路基结构抗震能力影响因素与设计优化
Influencing Factors of the Seismic Resistance and Design Optimization of Highway Subgrade Structures Under Complex Geological Conditions
汤旭 1蒋银杰 1游家乐 1方鑫1
作者信息
- 1. 江苏省地质局第一地质大队(江苏南京地质工程勘察院),南京 210041
- 折叠
摘要
Abstract
To address the issue of weakened seismic performance of highway subgrade in complex geological envi-ronments,this study investigates the multi-factor coupling mechanism and design optimization.Based on the theory of soil dynamics,the dynamic response model of subgrade under typical geological conditions(soft soil/liquefied soil/near-fault/high fill)is established,and the interaction mechanism between geological background and struc-tural parameters on seismic capacity is systematically analyzed.The results show that the change of the dynamic characteristics of the underlying soil significantly affects the amplitude of the seismic subsidence deformation.The spatial distribution characteristics of the liquefied interlayer determine the anti-liquefaction stability.The difference of the fault position causes the asymmetric dynamic response.The geometric shape and material parameters of the subgrade dominate the development mode of permanent deformation.Based on this,a geologically adaptive optimi-zation technology system is proposed:lightweight fill materials and drainage composite technology are used for soft soil foundations,pile-grid collaborative disposal is implemented for liquefaction-prone foundations,and stepped reinforced structures are constructed for high-fill embankments.关键词
复杂地质/公路路基结构/抗震能力Key words
Complex geology/Highway subgrade structure/Seismic resistance capacity分类
建筑与水利引用本文复制引用
汤旭,蒋银杰,游家乐,方鑫..复杂地质背景下公路路基结构抗震能力影响因素与设计优化[J].华南地震,2026,46(2):109-114,6.
