高速公路特殊路基处理与生态防护协同设计

Collaborative Design of Special Subgrade Treatment and Ecological Protection for Expressways

摘要

修平高速公路穿越江南丘陵过湿区，面临软土广布、岩溶复杂的特殊地质难题，传统处理方式难以兼顾工程与生态需求。研究团队深入探究软土、岩溶路基处理技术与生态防护的协同机制，创新提出“工程措施固基+植物群落护坡”复合模式。工程上，采用深层挤密桩、强夯置换等加固软土，运用注浆填充、梁板跨越应对岩溶；生态防护则筛选适生植物构建多层植被群落。实践表明，该协同设计使软土路基工后沉降减少40%，边坡植被覆盖率超90%，既保障路基稳定，又重建生态系统，为山区公路绿色建造提供理论与技术支撑。

Abstract

The Xiuping Expressway passes through the humid hilly area of southern Jiangnan, facing special geological challenges such as widespread soft soil and complex karst, where traditional treatment methods struggle to balance engineering and ecological needs. The research team deeply explores the collaborative mechanism between soft soil/karst subgrade treatment technologies and ecological protection, innovatively proposing a composite model of “engineering measures for foundation stabilization + plant community slope protection.” Engineering-wise, deep mixing piles and dynamic compaction replacement are used to reinforce soft soil, while grouting filling and beam-slab spanning address karst issues. For ecological protection, adaptive plant species are selected to build multi-layer vegetation communities. Practices show that this collaborative design reduces post-construction settlement of soft soil subgrades by 40% and increases slope vegetation coverage to over 90%, ensuring subgrade stability while reconstructing ecosystems. It provides theoretical and technical support for green construction of mountainous highways.

关键词

山区公路 / 软土路基 / 岩溶处治 / 生态防护 / 协同设计

Key words

mountainous highway / soft soil subgrade / karst treatment / ecological protection / collaborative design

参考文献

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