改扩建公路新旧路面补强施工技术

Reinforcement Construction Technology of New and Old Pavement of Reconstruction and Expansion Highway

乌鲁木齐绕城高速公路改建段由于旧路宽度窄(原路面宽度只有10米),且交通量很大,施工期间乌鲁木齐市禁止大型车辆在河滩路和外环路通行,没有条件进行车辆分流,也不能封闭、中断交通。路基拼宽时开挖台阶后路面宽度更窄,只能勉强维持双向通行,在路面施工时不能采用半幅通铺的施工方法,导致路面产生纵向施工接缝。因此该段新旧路面结合部相对薄弱,路面质量的可靠性、耐久性无法保证,且在重载交通长期荷载作用下,势必会造成路面早期破坏,增加运营期间的维护费用。

Due to the narrow width of the old road(the original pavement width is only 10 meters)and the heavy traffic during the reconstruction of the Urumqi Ring Expressway,Urumqi prohibits large vehicles from passing on Hetan Road and Outer Ring Road during construction,and has no conditions to divert vehicles,and can not close or interrupt traffic.When the subgrade is widened,the width of the road surface is narrower after excavation of the steps,and it can only barely maintain two-way traffic.The construction method of half-width paving cannot be used during road construction,resulting in longitudinal construction joints on the road surface.Therefore,the junction of new and old pavements in this section is relatively weak,the reliability and durability of pavement quality cannot be guaranteed,and under the long-term load of heavy-duty traffic,it will inevitably cause early pavement damage and increase maintenance costs during operation.