海堤公路拓宽工程中新建路堤对老海堤沉降的影响

通过在海域中海堤公路拓宽工程的典型断面埋设沉降监测仪器,研究新建路堤在建设过程中对老海堤公路的影响。实测结果表明:老海堤公路左、右两侧路肩在新建路堤建设过程中会产生较大的沉降,且左、右路肩的沉降差异较大,易产生裂缝。用Plaxis有限元软件模拟分析表明,模拟结果与实测值有较高的一致性,新、老海堤公路下均产生了水平位移,老海堤公路最大位移量0.5 m,新建路堤最大位移量达0.8 m,两者位移方向相反。拓宽海域海堤公路设计时应对这些位置的差异沉降采取适当修正措施。

Impact of new embankment on settlement of old seawall in road widening project

By embedding settlement monitoring instruments in a typical section of a seawall road widening project in a sea area, the impact of the new embankment during its construction on the settlement of the old seawall was studied. Measured results indicate that the construction of the new embankment has caused significant settlement of the old seawall, with a large difference between the amounts of settlement at its left and right road shoulders, which leads to cracking. Simulation analysis using Plaxis finite element software shows that the horizontal displacements in opposite directions, with maximum values of 0. 5 m and 0. 8 m, occur under the old seawall and new embankment, respectively, and that the simulated results agree with the measured data. Thus, appropriate corrective measures should be taken in response to differential settlements during the design of the seawall road widening project.