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为研究过量开采地下卤水对德大铁路DK228+700-DK257+529区间段发生区域性沉降的影响,基于铁路路肩精密水准测量结果,采用有限差分软件FLAC~(3D)进行数值模拟的方法,研究了抽水过程中土体及铁路路基沉降的特性.研究结果表明:卤水井抽水造成地面沉降的范围和沉降量受水井数量和水位变化的影响,且主要受水位变化的影响;受抽水影响,处于-25.2~-2.5 m内的浅层土体发生较大的压缩,是造成土体沉降的主体部分;铁路路基沉降尚未达到稳定,沉降仍会继续.这可为因抽水造成的路基沉降的预测和治理工作提供重要参考.
In order to study the influence of excessive exploitation of underground brine on the regional settlement of DK228 + 700-DK257 + 529 section of Dezhou-Dadu Railway, based on the results of precision leveling measurement of railway shoulder and shoulder, numerical simulation using finite difference software FLAC ~ (3D) The results show that the range and settlement of ground subsidence caused by pumping wells are affected by the number of wells and the variation of water level and are mainly affected by the variation of water level. In the area of -25.2 ~ -2.5 m, the shallow soil body is greatly compressed, which is the main part that causes the settlement of the soil body. The settlement of the railway roadbed has not yet stabilized and the settlement will continue. This is the prediction of subsidence caused by pumping And governance work to provide an important reference.