山区高速公路路基拓宽差异沉降控制  

Differential Settlement Control of Mountain Highway Roadbed Widening

作　　者：谢波 张永奇 赵海斌 程玉峰 张万茂 XIE Bo;ZHANG Yongqi;ZHAO Haibin;CHENG Yufeng;ZHANG Wanmao(CCCC Bridge South China Engineering Co.,Ltd.,Zhongshan 528403,Guangdong,China;School of Resources and Safety Engineering,Central South University,Changsha 410006,China)

机构地区：[1]中交路桥华南工程有限公司,广东中山528403 [2]中南大学资源与安全工程学院,长沙410006

出　　处：《路基工程》2024年第3期213-221,共9页Subgrade Engineering

摘　　要：依托某山区高速公路改扩建工程,建立路基拓宽差异沉降计算模型,模拟分析常规路基填料和泡沫轻质土填料对路基差异沉降的控制效果。结果表明:采用常规路基填料填筑时,铺设土工格室在一定程度上可以控制路基差异沉降,铺设数量越多对路基的水平位移控制效果越好;采用泡沫轻质土填筑可以有效改善新旧路基的差异沉降和水平位移,泡沫轻质土填筑高度宜控制在6~8 m,并进行泡沫轻质土填筑结构形式的优化,提出泡沫轻质土和包边土混合路基填筑方案,以控制路基填筑成本。Relying on the modification and expansion project of a mountainous highway,a calculation model of differential settlement of roadbed widening is established to simulate and analyze the control effect of conventional roadbed fill and foam lightweight soil fill on differential settlement of roadbed.The results show that:when using conventional roadbed filler,laying geocells can control the differential settlement of roadbed to a certain extent,and the more the number of laying,the better the effect of controlling the horizontal displacement of roadbed;the use of foam lightweight soil fill can effectively improve the differential settlement of new and old roadbeds and horizontal displacement,and it is appropriate to control the height of the foam lightweight soil fill at 6−8 m.The optimization of the structural form of the foam lightweight soil fill is also carried out,and the optimization of the structural form of the foam lightweight soil fill is proposed.The optimization of foam lightweight soil filling structure form is also carried out,and the hybrid roadbed filling scheme of foam lightweight soil and bundside soil is proposed to control the roadbed filling cost.

关 键 词：公路路基 改扩建 沉降监测 位移控制 方案优化 成本控制 

分 类 号：U416.1[交通运输工程—道路与铁道工程]