多级桩锚结构体系在山地城市有限空间的实践

Practice of Multi-level Pile Anchor Structure System in Limited Space of Mountainous Cities

摘要:

为城市核心区用地受限条件下极软岩超限边坡的设计难题提供解决思路，依托实际工程，采用数值模拟和现场监测的方法，对城市核心区用地特征和超限挡墙设计挑战进行分析，对设计阶段材料选择、结构优化和生态设计等关键技术进行探讨。结果表明：对于用地受限的极软岩超限挖方边坡，采用与压力分散型锚索相结合的多级桩锚结构体系，能有效的提高空间利用效率，实现极限保护，降低环境影响；对于城市核心区利用立面空间进行植物嵌入，创造生态空间，形成层层遮挡，能弱化挡墙，给城市带来较好的绿化效果。

Abstract:

Aiming to provide solutions to the design challenges of ultra-soft rock over-limit slopes under land use constraints in urban core areas, based on actual engineering cases, the numerical simulation and field monitoring methods was adopted to analyze land use characteristics and over-limit retaining wall design challenges in urban core areas and meanwhile to explore key technologies in material selection, structural optimization, and ecological design during the design phase. The results demonstrate that for over-limit excavation slopes in ultra-soft rock with land use constraints, the implementation of a multi-level pile-anchor structural system combined with pressure-dispersed anchor cables can effectively enhance spatial utilization efficiency, achieve ultimate protection, and reduce environmental impact. Furthermore, utilizing vertical space for plant integration in urban core areas to create ecological spaces and form layered shielding can mitigate the visual impact of retaining walls and provide significant greening effects for the city.