西南丘陵地区输水工程管材选用及系统水锤防护
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摘要
为了解决我国西南丘陵地区日益突出的供水矛盾,一批大型的输水工程陆续在该地区开工建设并投入使用。然而在西南丘陵地区类似这种大规模、长距离的输水工程尚无实例工程项目可供参考。本课题正是在此背景下,依托重庆西部供水规划四大骨干工程之一的铜罐驿长江输水工程进行课题展开和研究,重点对西南丘陵地区大规模、长距离输水工程项目的管材应用以及供水系统水锤防护方法进行了理论分析及应用研究。
铜罐驿长江输水工程输水管线总长105.44Km,输水管径最大为DN1600,最小输水管径为DN250;工程设计日供水量为26.5万m3,近期(2015年)年调长江水规模达4999万m3,远期(2025年)达7025万m3。该工程设有长江一级输水泵站、马家沟水库二级输水泵站、三座隧洞,一座沉沙池,一座高位水池、一座集泥干化池、五个加压泵站及12个供水点。该工程建设充分考虑了云贵川丘陵地区低山、丘陵地貌、地形呈狭长山脉与宽丘陵相间的平行岭谷景观的地形特点,对管线管材按口径大小进行了分类选择和优化组合。其大口径(DN800～DN1600)采用钢管和PCCP管(预应力钢筋混凝土管)混用的方案,是PCCP大口径管材在云贵川丘陵地区的首次大规模应用。
本论文的主要工作和结论如下:
①结合国内外大型输水工程管材的选用情况,重点对钢管、球墨铸铁管和PCCP管三种管材进行了比较研究,得出西南丘陵地区大型输水工程中的管材应用以PCCP管与钢管混用的方案为佳。
②针对PCCP管与钢管混用这一管材选用方案,结合铜罐驿工程实际设计施工情况,对PCCP管与钢管混用这一管材组合方式在西南丘陵地区应用中,在管道的基础设计施工、管道的安装及管道试压等方面进行了深入的分析研究,最后得出西南丘陵地区大流量长距离输水工程在管材选择应用方面的实施要点。
③对比当前通常应用的水锤防护方法,对铜罐驿长江输水工程的系统水锤效应及采取防护措施后的供水系统进行了计算机模拟分析研究,得出西南丘陵地区类似工程的系统水锤防护方面,采取管道沿线及泵站安装常规的水锤消除设备和适当的加大某些管段承压能力两种防护方法相结合的方案较为合适。此方案在工程项目的实际应用过程中取得了不错的效果。
本课题研究结果的意义如下:
本课题依托铜罐驿长江输水工程,对西南丘陵地区大型输水工程管材的选择应用及供水系统水锤防护方法的研究是切实可行的,其研究成果对今后类似工程建设也有着重要的参考价值和指导意义。
In order to address the growing prominence of water supply conflicts in the southwest hilly areas in China, a group of large-scale water diversion projects are constructed continuously in the region and put into use. However, there is no similar large-scale, long-distance water diversion project for reference in southwest hilly region at all. The topic in this context is relying on the Tongguanyi Yangtze River water diversion projec, one of the four key projects of the water supply planning in western Chongqing, with emphasis on the theoretical analysis and applied research of large-scale, long-distance water pipe project applications, and water supply system water hammer protection method in the southwest hilly area.
The total pipe length of Tongguanyi Yangtze River water diversion project is 105.44Km, with the maximum diameter of the water supplying pipe pipe DN1600, and the minimum DN250. The designed daily water supply capacity of the project is 265,000m3. The size of water adjusted from the Yangtze River Annually is up to 49.99 million m3 in the near future(in 2015) and 70.25 million m3 in the far future(in 2025) . The project consists of a primary water pumping station in Yangtze River, a secondary water pumping station in Majiagou, 3 tunnels, a sedimentation settling pool, a highly-positioned pool, a set of soil drying pools, five booster pump stations and 12 water supplying points.
The area of Yunnan-Guizhou is hilly terrain with low mountains and hilly land, the slender mountains and wide terrains appear as two parallel parts. The construction of the project has taken these characteristics into serious consideration. And the tube type on the pipeline has been classified and optimized carefully,according to its diameter size. The larger ones (DN800 ~ DN1600) use metal and PCCP pipe,which is large-scale application of PCCP pipe in the hilly terrain areas of Yunnan-Guizhou for the first time.
The main contents and conclusions of the text are as follows:
①According to the pipe selection in large-scale water transfer projects at home and abroad, we have put emphasis on the comparative study of three kinds of pipes: the steel pipe, ductile iron pipe PCCP pipe , Which comes to the conclution that: steel pipe mixed with PCCP pipe is the best scheme in the water transfer project of southwest hilly areas.
②Conbine pipe selecting scheme with the actual designing and construction situation in the Tongguanyi project , Taking the basic design and construction of the pipeline , its installation and piping pressure test ,and other aspects into deep account, we finally concluded the key points of the selection and application of pipe in the large-flow and long-distance water transfer project of southwest hilly areas.
③Compaired with the current method of water hammer protection, both systematic water hammer effect and the water diversion system after taking protective measures in Tongguanyi Yangtze River water project have been put into computer simulation study and analasis. As to the water hammer protection in similar projects of the southwest hilly region, it is suitable to combine regular installation of water-hammer eliminates devices along the pipeline and in the pumping stations and proper increasing of the pressure ability of certain pipes. combining the two programs more appropriate.
This scheme brings good results in the practical application of the project .
The significance of the results of this research project are as follows: Relying on the Tongguanyi Yangtze River water projects, large-scale water diversion project hilly area southwest of the choice of application of pipe and water systems in the study of water hammer protection method is feasible, the results of their research for the future construction of similar projects also have an important reference value and significance.
铜罐驿长江输水工程输水管线总长105.44Km,输水管径最大为DN1600,最小输水管径为DN250;工程设计日供水量为26.5万m3,近期(2015年)年调长江水规模达4999万m3,远期(2025年)达7025万m3。该工程设有长江一级输水泵站、马家沟水库二级输水泵站、三座隧洞,一座沉沙池,一座高位水池、一座集泥干化池、五个加压泵站及12个供水点。该工程建设充分考虑了云贵川丘陵地区低山、丘陵地貌、地形呈狭长山脉与宽丘陵相间的平行岭谷景观的地形特点,对管线管材按口径大小进行了分类选择和优化组合。其大口径(DN800～DN1600)采用钢管和PCCP管(预应力钢筋混凝土管)混用的方案,是PCCP大口径管材在云贵川丘陵地区的首次大规模应用。
本论文的主要工作和结论如下:
①结合国内外大型输水工程管材的选用情况,重点对钢管、球墨铸铁管和PCCP管三种管材进行了比较研究,得出西南丘陵地区大型输水工程中的管材应用以PCCP管与钢管混用的方案为佳。
②针对PCCP管与钢管混用这一管材选用方案,结合铜罐驿工程实际设计施工情况,对PCCP管与钢管混用这一管材组合方式在西南丘陵地区应用中,在管道的基础设计施工、管道的安装及管道试压等方面进行了深入的分析研究,最后得出西南丘陵地区大流量长距离输水工程在管材选择应用方面的实施要点。
③对比当前通常应用的水锤防护方法,对铜罐驿长江输水工程的系统水锤效应及采取防护措施后的供水系统进行了计算机模拟分析研究,得出西南丘陵地区类似工程的系统水锤防护方面,采取管道沿线及泵站安装常规的水锤消除设备和适当的加大某些管段承压能力两种防护方法相结合的方案较为合适。此方案在工程项目的实际应用过程中取得了不错的效果。
本课题研究结果的意义如下:
本课题依托铜罐驿长江输水工程,对西南丘陵地区大型输水工程管材的选择应用及供水系统水锤防护方法的研究是切实可行的,其研究成果对今后类似工程建设也有着重要的参考价值和指导意义。
In order to address the growing prominence of water supply conflicts in the southwest hilly areas in China, a group of large-scale water diversion projects are constructed continuously in the region and put into use. However, there is no similar large-scale, long-distance water diversion project for reference in southwest hilly region at all. The topic in this context is relying on the Tongguanyi Yangtze River water diversion projec, one of the four key projects of the water supply planning in western Chongqing, with emphasis on the theoretical analysis and applied research of large-scale, long-distance water pipe project applications, and water supply system water hammer protection method in the southwest hilly area.
The total pipe length of Tongguanyi Yangtze River water diversion project is 105.44Km, with the maximum diameter of the water supplying pipe pipe DN1600, and the minimum DN250. The designed daily water supply capacity of the project is 265,000m3. The size of water adjusted from the Yangtze River Annually is up to 49.99 million m3 in the near future(in 2015) and 70.25 million m3 in the far future(in 2025) . The project consists of a primary water pumping station in Yangtze River, a secondary water pumping station in Majiagou, 3 tunnels, a sedimentation settling pool, a highly-positioned pool, a set of soil drying pools, five booster pump stations and 12 water supplying points.
The area of Yunnan-Guizhou is hilly terrain with low mountains and hilly land, the slender mountains and wide terrains appear as two parallel parts. The construction of the project has taken these characteristics into serious consideration. And the tube type on the pipeline has been classified and optimized carefully,according to its diameter size. The larger ones (DN800 ~ DN1600) use metal and PCCP pipe,which is large-scale application of PCCP pipe in the hilly terrain areas of Yunnan-Guizhou for the first time.
The main contents and conclusions of the text are as follows:
①According to the pipe selection in large-scale water transfer projects at home and abroad, we have put emphasis on the comparative study of three kinds of pipes: the steel pipe, ductile iron pipe PCCP pipe , Which comes to the conclution that: steel pipe mixed with PCCP pipe is the best scheme in the water transfer project of southwest hilly areas.
②Conbine pipe selecting scheme with the actual designing and construction situation in the Tongguanyi project , Taking the basic design and construction of the pipeline , its installation and piping pressure test ,and other aspects into deep account, we finally concluded the key points of the selection and application of pipe in the large-flow and long-distance water transfer project of southwest hilly areas.
③Compaired with the current method of water hammer protection, both systematic water hammer effect and the water diversion system after taking protective measures in Tongguanyi Yangtze River water project have been put into computer simulation study and analasis. As to the water hammer protection in similar projects of the southwest hilly region, it is suitable to combine regular installation of water-hammer eliminates devices along the pipeline and in the pumping stations and proper increasing of the pressure ability of certain pipes. combining the two programs more appropriate.
This scheme brings good results in the practical application of the project .
The significance of the results of this research project are as follows: Relying on the Tongguanyi Yangtze River water projects, large-scale water diversion project hilly area southwest of the choice of application of pipe and water systems in the study of water hammer protection method is feasible, the results of their research for the future construction of similar projects also have an important reference value and significance.
引文
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[3]吴恒卿.长距离输水管材性能比较及选用[J].广西城镇建设.2007.6.P83~85.
[4]陈文斌.预应力钢管在市政工程中的应用[J].中国市政工程.2006.4.P72~73
[5]张树凯.预应力钢筒混凝土管发展回顾与前景展望[J].混凝土与水泥品.2007.2. P25~28
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[7]秦允斌.大直径PCCP管道在大型引水工程中的应用[J].特种结构.2003.20.3. P53~54
[8]工程连接段管材的设计选择[J].科技情报开发与济.2003.13.12. P266~267
[9]汪兴华,关兴旺.停泵水锤及其防护[M].中国建筑工业出版社.2004.P1~2
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