济南西郊基坑工程地下水加压回灌试验分析
|
摘要
济南是举世闻名的"泉城",地下水资源的保护对济南的经济社会发展具有十分重要意义。为了解决城市建设过程中,基坑降水引起的地下水资源的过度流失问题,在济南西郊开展地下水加压回灌试验,得出以下结论:①在济南西郊富水卵石层地质条件下,加压回灌对于回灌井工作效率的提高具有显著效果,从现场试验数据来看,当井口压力增加至0.07MPa时,各井回灌量均表现出相比常压状态下50%左右的增长量;②随着回灌井口压力增加,回灌影响范围相应扩大,井口压力达到0.05MPa时,回灌影响半径相比常压状态下增长达80%以上。虽然加压回灌对于增加回灌井工作效率具有显著效果,但应考虑回灌目的层以上土层的渗透风险和回灌井周密封措施的抗渗强度,须按最不利情况设定回灌井口压力上限值。试验表明,加压回灌适用于济南西郊强透水卵石层,回灌量大且效率高,能有效补偿由于基坑降水引起的地下水资源的流失,对于"护泉"具有重要意义。
Ji'nan is the world famous "Spring City", the protection of groundwater resources is of great significance to its economic and social development. In order to solve the problem of excessive loss of groundwater resources caused by foundation pit dewatering in urban construction process, groundwater pressurized recharge experiment was carried out in the western suburbs of the city. The following conclusions are drawn: 1) Under the geological condition of the water rich oval layer in the western suburb of Ji'nan, pressurized recharge has a significant effect on improving the efficiency of the recharge well. From field test data, when the wellhead pressure increases to 0.07 MPa, the recharge volume of each well shows a growth rate of about 50%compared to normal pressure. 2) With the increase of the pressure of the recharge well, the influence range of recharge is enlarged, and when the wellhead pressure reaches 0.05 MPa, the influence radius of the recharge is increased by more than 80% compared with the normal pressure. Although pressurized recharge has significant effect on increasing the working efficiency of recharge wells, it is necessary to consider the seepage risk of the soil layer above the target level and the impervious strength of the sealing measures around the recharge well.The upper limit of recharge pressure at the wellhead must be set according to the most unfavorable condition. The test shows that the pressure recharge is suitable for the strong water permeable gravel layer in the western suburb of Ji'nan, which has great recharge and high efficiency. It can effectively compensate for the loss of groundwater resources caused by the dewatering of the foundation pit, which is of great significance to the "spring protection".
Ji'nan is the world famous "Spring City", the protection of groundwater resources is of great significance to its economic and social development. In order to solve the problem of excessive loss of groundwater resources caused by foundation pit dewatering in urban construction process, groundwater pressurized recharge experiment was carried out in the western suburbs of the city. The following conclusions are drawn: 1) Under the geological condition of the water rich oval layer in the western suburb of Ji'nan, pressurized recharge has a significant effect on improving the efficiency of the recharge well. From field test data, when the wellhead pressure increases to 0.07 MPa, the recharge volume of each well shows a growth rate of about 50%compared to normal pressure. 2) With the increase of the pressure of the recharge well, the influence range of recharge is enlarged, and when the wellhead pressure reaches 0.05 MPa, the influence radius of the recharge is increased by more than 80% compared with the normal pressure. Although pressurized recharge has significant effect on increasing the working efficiency of recharge wells, it is necessary to consider the seepage risk of the soil layer above the target level and the impervious strength of the sealing measures around the recharge well.The upper limit of recharge pressure at the wellhead must be set according to the most unfavorable condition. The test shows that the pressure recharge is suitable for the strong water permeable gravel layer in the western suburb of Ji'nan, which has great recharge and high efficiency. It can effectively compensate for the loss of groundwater resources caused by the dewatering of the foundation pit, which is of great significance to the "spring protection".
引文
[1]张宗祜,李烈荣.中国地下水资源,山东卷[M].北京:中国地图出版社,2005(Zhang Zonghu,Li Lierong.Groundwater resources in China(Shandong volume)[M].Beijing:China Cartographic Publishing House,2005(in Chinese)).
[2]杨丽芝,韩晔,佟照辉,等.重大工程建设对济南泉水的影响研究[J].工程勘察,2012,40(5):42-48(Yang Lizhi,Han Ye,Tong Hui,et al.Research of the impact of major construction projects to Jinan spring[J].Geotechnical Investigation&Surveying,2012,40(5):42-48(in Chinese))
[3]陆建生.深基坑工程回灌管井设计若干问题探讨[J].探矿工程:岩土钻掘工程,2013,40(8):42-46(Lu Jiansheng.Study on optimization design of tube well recharge for foundation pit[J].Exploration Engineering:Rock&Soil Drilling and Tunneling,2013,40(8):42-46(in Chinese))
[4]李恒太,石萍,武海霞.地下水人工回灌技术综述[J].中国国土资源经济,2008(3):41-42,45(Li Hengtai,Shi Ping,Wu Haixia.Summary of artificial recharge technology for groundwater[J].Natural Resource Economics of China,2008(3):41-42,45(in Chinese))
[5]俞建霖,龚晓南.基坑工程地下水回灌系统的设计与应用技术研究[J].建筑结构学报,2001,22(5):70-74(Yu Jianlin,Gong Xiaonan.Study on the design and the application of the groundwater recharge system in excavation[J].Journal of Building Stuctures,2001,22(5):70-74(in Chinese))
[6]毛根海,宋建锋,姚懿伦,等.回灌技术在基坑工程中的应用研究[J].浙江大学学报:工学版,2005,39(1):166-169(Mao Genhai,Song Jianfeng,Yao Yilun,et al.Research on application of recharging technique in excavation engineering[J].Journal of Zhejiang University:Engineering Science,2005,39(1):166-169(in Chinese))
[7]陆建生,潘伟强,沈池,等.深基坑承压水抽灌一体化设计及工程应用[J].施工技术,2014,43(1):48-52(Lu Jiansheng,Pan Weiqiang,Shen Chi,et al.Design and application on pumping-recharge integration system of deep foundation excavation[J].Construction Technology,2014,43(1):48-52(in Chinese))
[8]罗华锋,郭栋.深层承压水降水回灌规律研究[J].佳木斯大学学报:自然科学版,2017,35(1):30-35(Luo Huafeng,Guo Dong.Research on the deep confined water precipitation recharge patterns[J].Journal of Jiamusi University:Natural Science Edition,2017,35(1):30-35(in Chinese))
[9]侯景岩,魏连伟.用降水回灌法改善北京地铁“复─八线”工程地质环境和施工条件[J].水文地质工程地质,1997(3):38-41
[10]瞿成松,陈蔚,黄雨.人工回灌控制基坑工程地面沉降的数值模拟[J].中国海洋大学学报,2011,41(6):87-92,108(Qu Chengsong,Chen Wei,Huang Yu.Numerical simulation for subsidence of deep foundation pits controlled by artifical groundwater recharge[J].Periodical of Ocean University of China,2011,41(6):87-92,108(in Chinese))
[11]瞿成松,王金生,朱悦铭,等.基于浅层地下水回灌的基坑工程沉降防治分析与计算[J].水文地质工程地质,2012,39(6):62-66(Qu Chengsong,Wang Jinsheng,Zhu Yueming,et al.Analysis and calculation of subsidence of foundation engineering based on shallow groundwater injection[J].Hydrogeology&Engineering Geology,2012,39(6):62-66(in Chinese))
[12]柏瑞.含水层之间通过井回灌量的计算[J].水文地质工程地质,1983(3):34-37(Bo Rui.Calculation of the recharge amount through well between aquifers[J].Hydrogeology&Engineering Geology,1983(3):34-37(in Chinese))
[13]陈崇希,等.地下水动力学[M].第5版.北京:地质出版社,2011(Chen Chongxi,et al.Groundwater Hydraulics[M].5th edition.Beijing:Geological Publishing House,2011(in Chinese))
[14]殷宗泽,等.土工原理[M].北京:中国水利水电出版社,2007(Yin Zongze,et al.Geotextile principle[M].Beijing:China Water Conservancy and Hydropower Press,2007(in Chinese))
[15]姚天强,石振华.基坑降水手册[M].北京:中国建筑工业出版社,2006(Yao Tianqiang,Shi Zhenhua.Foundation pit precipitation manual[M].Beijing:China Architecture&Building Press,2006(in Chinese))
[2]杨丽芝,韩晔,佟照辉,等.重大工程建设对济南泉水的影响研究[J].工程勘察,2012,40(5):42-48(Yang Lizhi,Han Ye,Tong Hui,et al.Research of the impact of major construction projects to Jinan spring[J].Geotechnical Investigation&Surveying,2012,40(5):42-48(in Chinese))
[3]陆建生.深基坑工程回灌管井设计若干问题探讨[J].探矿工程:岩土钻掘工程,2013,40(8):42-46(Lu Jiansheng.Study on optimization design of tube well recharge for foundation pit[J].Exploration Engineering:Rock&Soil Drilling and Tunneling,2013,40(8):42-46(in Chinese))
[4]李恒太,石萍,武海霞.地下水人工回灌技术综述[J].中国国土资源经济,2008(3):41-42,45(Li Hengtai,Shi Ping,Wu Haixia.Summary of artificial recharge technology for groundwater[J].Natural Resource Economics of China,2008(3):41-42,45(in Chinese))
[5]俞建霖,龚晓南.基坑工程地下水回灌系统的设计与应用技术研究[J].建筑结构学报,2001,22(5):70-74(Yu Jianlin,Gong Xiaonan.Study on the design and the application of the groundwater recharge system in excavation[J].Journal of Building Stuctures,2001,22(5):70-74(in Chinese))
[6]毛根海,宋建锋,姚懿伦,等.回灌技术在基坑工程中的应用研究[J].浙江大学学报:工学版,2005,39(1):166-169(Mao Genhai,Song Jianfeng,Yao Yilun,et al.Research on application of recharging technique in excavation engineering[J].Journal of Zhejiang University:Engineering Science,2005,39(1):166-169(in Chinese))
[7]陆建生,潘伟强,沈池,等.深基坑承压水抽灌一体化设计及工程应用[J].施工技术,2014,43(1):48-52(Lu Jiansheng,Pan Weiqiang,Shen Chi,et al.Design and application on pumping-recharge integration system of deep foundation excavation[J].Construction Technology,2014,43(1):48-52(in Chinese))
[8]罗华锋,郭栋.深层承压水降水回灌规律研究[J].佳木斯大学学报:自然科学版,2017,35(1):30-35(Luo Huafeng,Guo Dong.Research on the deep confined water precipitation recharge patterns[J].Journal of Jiamusi University:Natural Science Edition,2017,35(1):30-35(in Chinese))
[9]侯景岩,魏连伟.用降水回灌法改善北京地铁“复─八线”工程地质环境和施工条件[J].水文地质工程地质,1997(3):38-41
[10]瞿成松,陈蔚,黄雨.人工回灌控制基坑工程地面沉降的数值模拟[J].中国海洋大学学报,2011,41(6):87-92,108(Qu Chengsong,Chen Wei,Huang Yu.Numerical simulation for subsidence of deep foundation pits controlled by artifical groundwater recharge[J].Periodical of Ocean University of China,2011,41(6):87-92,108(in Chinese))
[11]瞿成松,王金生,朱悦铭,等.基于浅层地下水回灌的基坑工程沉降防治分析与计算[J].水文地质工程地质,2012,39(6):62-66(Qu Chengsong,Wang Jinsheng,Zhu Yueming,et al.Analysis and calculation of subsidence of foundation engineering based on shallow groundwater injection[J].Hydrogeology&Engineering Geology,2012,39(6):62-66(in Chinese))
[12]柏瑞.含水层之间通过井回灌量的计算[J].水文地质工程地质,1983(3):34-37(Bo Rui.Calculation of the recharge amount through well between aquifers[J].Hydrogeology&Engineering Geology,1983(3):34-37(in Chinese))
[13]陈崇希,等.地下水动力学[M].第5版.北京:地质出版社,2011(Chen Chongxi,et al.Groundwater Hydraulics[M].5th edition.Beijing:Geological Publishing House,2011(in Chinese))
[14]殷宗泽,等.土工原理[M].北京:中国水利水电出版社,2007(Yin Zongze,et al.Geotextile principle[M].Beijing:China Water Conservancy and Hydropower Press,2007(in Chinese))
[15]姚天强,石振华.基坑降水手册[M].北京:中国建筑工业出版社,2006(Yao Tianqiang,Shi Zhenhua.Foundation pit precipitation manual[M].Beijing:China Architecture&Building Press,2006(in Chinese))
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |