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临近既有路基工程的降水工程引起的地基固结沉降问题对其既有公路、铁路等交通工程的安全运营具有重要的现实意义。论文选取金普线DK28+345~+515段隧道下穿含沈大高速主干道和与主干道连接的跨越隧道的三条匝道为工程背景,针对金普线的地质构造,结合渗透理论利用FLAC3D,就高速公路路基隧道的降水引起的路基变形进行深入研究,分析了降水渗流对路基沉降的影响,得到渗流对路基影响的一般情况,为工程沉降控制提供了科学依据,为今后同类工程的设计计算提供参考。
The consolidation and settlement of foundation caused by the precipitation project near the existing roadbed engineering is of important practical significance for the safe operation of the existing road and railways. In this paper, we choose three ramps of Jinpu line DK28 + 345 ~ + 515 under the tunnel with Shen-Da highway and three tunnels crossing the main road as the engineering background. According to the geologic structure of Jinpu line and FLAC3D, The subgrade deformation caused by the precipitation of expressway subgrade tunnel is studied in depth. The influence of seepage flow on subgrade settlement is analyzed, and the general situation of seepage caused by subgrade is analyzed. It provides a scientific basis for the settlement control of the project. for reference.