山区公路微型桩-加筋土挡墙系统技术开发

发布时间：2018-05-31 18:01

本文选题：加筋土挡墙 + 微型桩　；参考：《中南大学学报(自然科学版)》2017年07期

【摘要】：针对修筑于斜坡地带的公路加筋土挡墙系统的设计、施工难点和破坏模式,开发一种适合于我国西部山区特点的微型桩-加筋土挡墙系统:竖直和倾斜的一对微型桩从路面穿过加筋土挡墙的回填土区域,并锚固进地基,同时,在桩顶处浇筑承台和地基梁,使微型桩布置成为纵向框架组合形式,并通过连接构件将护栏与地基梁及微型桩相连,形成"护栏—连接构件—地基梁—微型桩—加筋土—地基"这一自上而下的整体加固体系。介绍该加固系统的结构形式、技术特点、施工方法和质量控制等,对采取不同加固措施的斜坡加筋土挡墙的变形特性进行数值模拟分析,初步验证所提出的加固方法的优越性。研究结果表明:该系统施工方便,不需要大量挖填方,收坡效果好,仅增加适当的材料用量,即可实现加强挡土墙局部稳定性、整体稳定性和护栏抗冲击性能的多重加固目的。
[Abstract]:Aiming at the design, construction difficulty and failure mode of reinforced earth retaining wall system of highway built in the slope zone, A miniature pile-reinforced earth retaining wall system suitable for the mountain area of western China is developed: vertical and inclined miniature piles pass through the backfill area of the reinforced earth retaining wall from the road surface and are anchored into the foundation, at the same time, The pile cap and foundation beam are cast at the top of the pile, so that the micro-pile is arranged in the form of longitudinal frame combination, and the guardrail is connected to the foundation beam and micro-pile by connecting members. The whole reinforcement system of "guardrail-connecting member-foundation beam-micro pile-reinforced soil-foundation" is formed. The structural form, technical characteristics, construction method and quality control of the reinforcement system are introduced. The deformation characteristics of reinforced earth retaining wall with different reinforcement measures are numerically simulated and the superiority of the proposed reinforcement method is preliminarily verified. The research results show that the system is easy to construct, does not need a large number of excavation and fill, and has good slope closing effect. The purpose of strengthening the local stability of retaining wall, the overall stability and the impact resistance of barrier can be achieved by increasing the appropriate amount of materials.
【作者单位】：河海大学土木与交通学院;国土资源部丘陵山地地质灾害防治重点实验室(福建省地质灾害重点实验室);重庆大学山地城镇建设与新技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(51609040) 福建省自然科学基金资助项目(2016J05112) 福建省科技创新平台建设项目(2014Y2007)~~
【分类号】：U417.11

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