拓宽道路工后差异沉降控制标准

Controlling criterion of differential settlements after widening expressway

为了防止道路拓宽工程中过大的差异沉降引起路面纵向裂缝和路基失稳,以河南安新(安阳—新乡)拓宽道路工程为实体依托工程,采用有限元方法,从路面结构对差异沉降的力学响应、平整度对差异沉降指标的要求、行车荷载对差异沉降指标的要求等方面,研究拓宽道路工后差异沉降控制标准,并对差异沉降进行了分级。结果表明:以路面结构的力学响应考虑差异沉降控制指标较好,并以4 cm作为差异沉降控制标准的低限,以9 cm作为差异沉降控制标准的高限。

In order to prevent the longitudinal crack and stability failure caused by differential settlements after widening roads, based on the project of widening expressway from Anyang to Xinxiang in Henan, this paper studies the differential settlements from those aspects such as mechanical influence, the request of evenness and traveling load. The result shows that the mechanical influence of pavement structure on differential settlements should be the controlling criterion, and 4 cm and 9 cm are the low limit and high limit of it. 1 tab, 5 figs, 9 refs.