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The reason of land subsidence and prevention measures of Beijing segment of Beijing-Tianjin high-speed rail

机译：北京天津高速铁路北京地区土地沉降与预防措施的原因

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Beijing-Tianjin high-speed railway is China's first high-speed passenger rail lines. Its high-speed has strict requirements of rail deformation. The Beijing-Tianjin high-speed rail across the Chaoyang and Tongzhou where affect land subsidence. It mainly affects the track ride and security due to performance of the regional uneven settlement. The research has shown that: the large pumping of groundwater is the main reason of causing land subsidence along Beijing-Tianjin high-speed railway. At the same time, it is also affected by tectonic environment, sedimentary environments and secondary consolidation of the soil etc. Therefore, it need limiting the groundwater pumping near the Beijing-Tianjin high-speed railway. In addition, optimizing the groundwater extraction program and strengthen groundwater monitoring is also necessary. Groundwater recharge is need if there is severely land subsidence.
机译：北京天津高速铁路是中国第一个高速客车线。其高速具有严格的轨道变形要求。北京天津高速铁路，朝阳和通州在哪里影响土地沉降。由于区域不均匀定居点的性能，它主要影响跟踪骑行和安全性。该研究表明：地下水的大型泵送是北京天津高速铁路造成地地沉降的主要原因。与此同时，它也受到构造环境，沉积环境和土壤的二次固结等的影响，因此需要限制京津高速铁路附近的地下水。此外，还需要优化地下水提取程序并加强地下水监测。如果存在严重的土地沉降，则需要地下水充电。

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