郑东新区龙湖工程湖区周边渗漏水回补调控措施

发布时间：2018-06-03 09:05

本文选题：龙湖 + 渗漏量　；参考：《天津大学》2014年硕士论文

【摘要】：龙湖工程位于河南省郑州市郑东新区，通过人工开挖成湖，龙湖周边湖岸规划标高87.50m，正常蓄水位85.50m，龙湖水域面积5.6km2，平均水深4.5m，最大水深7.0m，相应的水体体积为2680×104m3。龙湖工程采用垂直防渗与水平防渗相结合的方案，即湖周设一道塑性混凝土防渗墙，防渗墙厚度为30cm、防渗墙渗透系数为1106cm/s，防渗墙深入第5层重粉质壤土层1m；湖湾区采用壤土铺盖防渗，防渗铺盖透水性为110-6cm/s、铺盖厚度为50cm。湖区周边布置25个截渗井，井半径0.5m，井深至细沙层1~5m，即75m高程。鉴于龙湖工程仍有一定的水渗入周边地区，本文依据郑东新区龙湖周边水文地质资料，建立龙湖工程三维渗流模型，对截渗井回注水方案进行研究。（1）数值模拟了建湖前龙湖所在区域的地下水状况，，并与勘测地下水数据进行了比较，率定了所建立的龙湖地下水数学模型，数值模拟结果与实测地下水结果吻合较好。（2）模拟了龙湖成湖后无防渗措施情况下龙湖湖区水位85.5m的地下水渗流场及渗漏量。研究结果表明，龙湖无防渗措施情况年渗漏量3102.5×104m3/a。（3）模拟了龙湖成湖后采取防渗措施情况下龙湖湖区水位85.5m的地下水渗流场及渗漏量。研究结果表明，龙湖有防渗措施情况年渗漏量739.9×104m3/a。（4）模拟了有防渗措施情况龙湖湖区水位85.5m的湖周边截渗井初始方案的抽水量及水位变化。研究结果表明，截渗井单井年抽水量22.56×104m3/a，截渗井年抽水总量564×104m3/a。（5）根据初始方案的模拟结果进行优化，提出了五个截渗井优化方案，进行了抽水量及水位的模拟，通过分析比较，提出了截渗井抽水最终方案。截渗井抽水最终方案，即湖区周边设置29个截渗井，截渗井单井抽水量为60m3/h，研究结果表明，截渗井单井年抽水量20.82×104m3/a截渗井年抽水总量604×104m3/a。
[Abstract]:The Longhu Lake Project is located in the Zheng Dong New area of Zhengzhou City, Henan Province. The lake is constructed into a lake by artificial excavation. The normal water level is 85.50 m, the water area is 5.6 km ~ 2, the average water depth is 4.5 m, the maximum water depth is 7.0 m, and the corresponding water volume is 2680 脳 10 4 m ~ 3. The project of Longhu Lake adopts the combination of vertical and horizontal seepage control, that is, a plastic concrete cutoff wall is set up around the lake. The thickness of impermeable wall is 30 cm, the permeability coefficient of impervious wall is 1106 cm / s, the impervious wall is 1 m deep into the fifth layer of heavy silty loam, and the impermeability of impermeable cover is 110-6 cm / s and the thickness of pavement is 50 cm 路s. Around the lake area, 25 percolation wells with a radius of 0.5 m are arranged, and the depth of the well is 1 ~ 5 m, that is, 75 m elevation. According to the hydrogeological data of Longhu Lake in the new area of Zheng Dong, the three-dimensional seepage model of Longhu Lake project is established, and the water injection scheme of the intercepting seepage well is studied in this paper. 1) the groundwater condition of Longhu Lake in front of the lake is simulated numerically, and compared with the groundwater survey data, the mathematical model of groundwater in Longhu Lake is established. The numerical simulation results are in good agreement with the measured groundwater data. 2) the groundwater seepage field and seepage amount of 85.5 m water level in Longhu Lake were simulated without anti-seepage measures after the formation of Longhu Lake. The results show that the annual leakage of Longhu Lake is 3102.5 脳 104 m3 / a without seepage control measures. (3) the seepage field and seepage amount of the groundwater level of 85.5 m are simulated under the condition of taking anti-seepage measures after the formation of Longhu Lake. The results show that the annual leakage of Longhu Lake is 739.9 脳 104 m3 / a. (4) the water pumping capacity and water level change of the initial scheme of the percolation well around the lake with 85.5 m water level in the Longhu Lake region are simulated. The results show that the annual pumping capacity of a single well is 22.56 脳 10 ~ 4 m ~ (3 / a), and the total annual pumping amount is 564 脳 10 ~ (4) m ~ (-3 / a) a. 5) according to the simulation results of the initial scheme, the paper puts forward five optimized schemes for the seepage intercepting wells, and simulates the pumping capacity and water level. Through analysis and comparison, the final scheme of pumping in the percolation well is put forward. The final water pumping scheme of the percolation well is that 29 percolation wells are set up around the lake area, and the pumping capacity of the single well is 60m3 / h. The results show that the annual pumping capacity of the single well is 20.82 脳 104m3/a. The total annual pumping amount of the single well is 604 脳 10 ~ 4 m ~ 3 / a.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TV213.4

【参考文献】