山区公路高架桥基穿越采空区处治控制效果研究

Study on the control effect of the viaduct base passing through the goaf in mountainous highway

依托四川省某高速公路为工程背景,采用数值模拟和现场测试相结合方法,对高架桥18~#桥墩桩基下部采空区采用布袋注浆处治控制效果进行研究。研究结果表明:采用布袋注浆能够有效发挥浆液固化作用,在确保桥基满足设计承载力同时变形得到有效控制,数值模拟与现场测试结果均验证该方法处治采矿区控制效果较好。

Relying on a highway in Sichuan Province as the engineering background, the numerical simulation and field test method are used to study the effect of bagging and grouting treatment on the goaf of the 18# piers of viaduct. The results show that the grouting can effectively play the role of slurry curing, and ensure that the bridge foundation meets the design bearing capacity and the deformation is effectively controlled. The numerical simulation and the field test result all verify that the mining area has better control effect.