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| Study on Influence of Ground Deformation in Ddqing Region on Harbin -Qiqihaer Passenger Dedicated Line |
| ZHEN Qing-ting |
| The Third Railway Survey and Design Insititute Group Corporation,Tianjin 300251，China |
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Abstract Research purposes: The Harbin-Qiqihaer Passenger Dedicated Line passes through the Daqing oilfield in where the ground rises or settles in the oil extraction area and the underground water dropping area because of the high-pressure waterflooding for oil extraction and the over exploitation of groundwater for production and living. The uneven ground deformation maybe influences the safety of high-speed railway. Thus, it is necessary to flnd out and study the range，speed and deformation volume of the ground deformation and their influence on the passenger dedicated line for providing the reference to the railway design.
Research conclusions: (1) For accurately knowing the regulation of the ground deformation of the Daqing area, the dynamic monitoring system for the ground deformation should be established to monitor the characteristics of the settlement and deformation of the quaternary system and the uplift deformation of the cretaceous system. (2) The mode of displacement of oil by chemistry should be used，the pressure of water-filling should be controlled，the pressure field should be balanced as much as possible，and the oil well and water-filling well near the railway should be removed or modified. (3) Based on the dynamic monitoring system，the coupling model for the groundwater exploitation，oil extraction，water filling and ground deformation should be established to forecast the occurrence and development trend of the ground deformation for providing the forecasting and warning to the railway engineering accurately. From the analysis it is concluded that with the improvement of the oil extraction technology, the reduction of underground water extraction and the establishment of the dynamic monitoring system，the ground deformation will be effectively controlled and relieved and the ground deformation will not produce the large influence on construction of the Harbin-Qiqihaer Passenger Dedicated Line.
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Received: 05 October 2012
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2013, Vol. 30 
