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Volume 7 Issue 2
Jul.  2019
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LI Ke, KANG Xiao-bing. 2019: Optimizing dewatering design for a metro station on the Chengdu Metro Line 7. Journal of Groundwater Science and Engineering, 7(2): 155-164.
Citation: LI Ke, KANG Xiao-bing. 2019: Optimizing dewatering design for a metro station on the Chengdu Metro Line 7. Journal of Groundwater Science and Engineering, 7(2): 155-164.

Optimizing dewatering design for a metro station on the Chengdu Metro Line 7

  • At present, most calculation results regarding foundation pit dewatering are ideal values, making construction resources prone to being wasted. In order to optimize the traditional pipe well design of large wells, the linear programming solution module in Excel is used, with the total water inflow taken as the objective function, the water level drawdown used as the constraint and test condition, and a station project on the Chengdu Metro Line 7 serving as the subject of this study. The total water inflow of the traditional pipe well design is optimized by the simplex method, producing a total water inflow of 4 040.65 m3/d, which, compared with 4 829.79 m3/d, the total water inflow calculated by means of the traditional design optimization method, engenders a reduction of roughly 16% per day. The feasibility of the optimization methodology is verified by the drawdown constraint, which reveals the decrease of construction costs and the diminution of the influence that the lowered groundwater level has on the surroundings of the metro station. Finally, references are provided as to optimizing the dewatering designs for other metro stations in similar engineering and hydrogeological conditions.
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  • [1] LI Wen-yon, FU Li, ZHU Zheng-feng, 2019: Numerical simulation and land subsidence control for deep foundation pit dewatering of Longyang Road Station on Shanghai Metro Line 18, Journal of Groundwater Science and Engineering, 7, 133-144.
    [2] ZHOU Chang-song, ZOU Sheng-zhang, ZHU Dan-ni, XIE Hao, CHEN Hong-feng, WANG Jia, 2018: Pollution pattern of underground river in karst area of the Southwest China, Journal of Groundwater Science and Engineering, 6, 71-83.
    [3] GUO Si-jia, GUO Gui-ping, 2018: Enhancement of gaseous mercury (Hg0) adsorption for the modified activated carbons by surface acid oxygen function groups, Journal of Groundwater Science and Engineering, 6, 104-114.
    [4] HUANG Shan-shan, JIANG Si-min, ZHANG Rui-cheng, ZHANG Shi-rong, ZHANG Wen, 2018: Foundation pit dewatering optimization design based on GMW-2005 and LGR technique, Journal of Groundwater Science and Engineering, 6, 234-242.  doi: 10.19637/j.cnki.2305-7068.2018.03.008
    [5] YUE Gao-fan, LV Wen-bin, ZHANG Wei, SU Ran, LIN Wen-jing, 2016: Optimization of geothermal water exploitation in Xinji, Hebei Province, P. R. China, Journal of Groundwater Science and Engineering, 4, 197-203.
    [6] WEI Jia-hua, CHU Hai-bo, WANG Rong, JIANG Yuan, 2015: Numerical simulation of karst groundwater system for discharge prediction and protection design of spring in Fangshan District, Beijing, Journal of Groundwater Science and Engineering, 3, 316-330.
    [7] HAN Kang-qin, LIU Jian, HAN Lei-lei, HAN Wen-ling, ZHANG Yun-xiao, 2014: Prediction of Impacts Caused by South-to-North Water Diversion on Underground Water Level in Shijiazhuang, Journal of Groundwater Science and Engineering, 2, 27-33.
    [8] Le SONG, Yan-pei CHENG, 2014: Optimization Research of Water-Soil Resources in Huanghua, Journal of Groundwater Science and Engineering, 2, 86-94.
    [9] Kang-qin HAN, Ri-sheng DUAN, Liang-liang JIA, Yuan-yuan DUAN, Min-ying FENG, 2014: Analysis on Present Status of Underground Water Pollution in Shijiazhuang and Its Prevention Measures, Journal of Groundwater Science and Engineering, 2, 44-48.
    [10] Peter MALIK, Dagmar HAVIAROVA, Anton AUXT, Zuzana GROLMUSOVA, Juraj MICHALKO, 2013: Isotopic Composition of Waters in the Dem?novská dolina Valley and Its Underground Hydrologic System During Winter and Spring of 2010/2011, Journal of Groundwater Science and Engineering, 1, 14-23.
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