PCCP管施工回填土深层压实度检测方法研究
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摘要
预应力钢筒混凝土管(简称PCCP)在国内外地下输水工程中得到广泛的应用,天津市南水北调配套工程亦使用了这种管材。回填土压实质量的好坏直接影响着工程质量,如何快速、准确地获得回填土深层压实度,对于保证工程质量十分重要。本文提出了轻型动力触探和无核密湿度仪相结合的回填土深层压实度检测方法,通过现场试验,获得轻型动力触探的锤击数与压实度并建立相关关系,并采用无核密湿度仪现场检测压实度以进行关系曲线的校准。通过实际工程应用,PCCP回填土深层压实度和轻型动力触探的锤击数具有良好的相关性,且该方法设备简单、操作容易、经济适用,并可随工程检验进行关系曲线的校验以提高精度,值得推广应用。
Prestressed Concrete Cylinder Pipe( PCCP) is widely used of underground conveyance engineering at home and abroad. Engineering quality is directly influenced by compacting quality of backfill soil. So,how to detect compactness of deep backfill soil rapidly and accurately is important. Compactness measurement method for deep backfill soil based on dynamic penetration and non-nuclear densimeter is presented. Through field test,blow count of light dynamic penetration and compactness can be acquired for establishing correlation,which can be calibrated using non-nuclear densimeter when construction. Through application in real project,compactness of deep backfill soil in PCCP construction has good correlation with blow count of light dynamic penetration. This method has the advantages of simple device,easy operation,economical and applicable,convenient calibration,so it is worth popularizing as a compactness measurement method for deep backfill soil of PCCP construction.
Prestressed Concrete Cylinder Pipe( PCCP) is widely used of underground conveyance engineering at home and abroad. Engineering quality is directly influenced by compacting quality of backfill soil. So,how to detect compactness of deep backfill soil rapidly and accurately is important. Compactness measurement method for deep backfill soil based on dynamic penetration and non-nuclear densimeter is presented. Through field test,blow count of light dynamic penetration and compactness can be acquired for establishing correlation,which can be calibrated using non-nuclear densimeter when construction. Through application in real project,compactness of deep backfill soil in PCCP construction has good correlation with blow count of light dynamic penetration. This method has the advantages of simple device,easy operation,economical and applicable,convenient calibration,so it is worth popularizing as a compactness measurement method for deep backfill soil of PCCP construction.
引文
[1]陈涌城,温晓英,李世龙,等.大口径PCCP管应用的关键技术问题解析[J].中国给水排水,2012,28(8):1-5.(Chen Yongcheng,Wen Xiaoying,Li Shilong,et al.Analysis on key technical problems in application of large-diameter prestressed concrete cylinder pipe[J].China Water&Waste Water,2012,28(8):1-5.(in Chinese))
[2]温晓英,程子悦,郭晓光.大口径PCCP管在软土地基中的应用[J].中国给水排水,2012,28(2):1-4.(Wen Xiaoying,Cheng Ziyue,Guo Xiaoguang,Application of large diameter PCCP in soft soil foundation[J].China Water&Waste Water,2012,28(2):1-4.(in Chinese))
[3]尉红彬.低液限粉土路基施工质量检测新技术研究[J].公路交通科技(应用技术版),2010(12):46-48.(Wei Hongbin.Research on the new testing techniques for construction quality in low liquid limit silty soil subgrade[J].Journal of Highway and Transportation Research and Development(Application Technology Edition),2010(12):46-48.(in Chinese))
[4]王福胜.轻型动力触探在粉煤灰路堤压实度检验中的应用[J].公路,1997(11):46-49.(Wang Fusheng.Application of light dynamic penetration in compactness test for fly ash embankment[J].Highway,1997(11):46-49.(in Chinese))
[5]张涛,左德元.动力触探在路基压实度检测中的应用[J].路基工程,2006(6):140-141.(Zhang Tao,Zuo Deyuan.Application of dynamic penetration in compactness test for embankment[J].Subgrade Engineering,2006(6):140-141.(in Chinese))
[6]孙嘉良.既有线铁路路基密实状态检测方法研究[J].铁道建筑技术,2015(1):1-3.(Sun Jialiang.Research on test of the dense state of existing railway subgrade[J].Railway Construction Technology,2015(1):1-3.(in Chinese))
[7]Rej2ek K.Results of dynamic penetration test-an indicator of the compaction of surface soil horizons by forestry machinery[J].Journal of Forest Science,2011(10):439-450.
[8]张道政.轻型动力触探检测砂土相对密实度的试验研究[J].价值工程,2014(32):119-120.(Zhang Daozheng.Experimental study on sand relative compactness detection with light dynamic sounding[J].Value Engineering,2014(32):119-120.(in Chinese))
[9]刘仰韶,田卿燕,吕建兵.轻便触探检测公路桥涵台背回填中粗砂的试验方法研究[J],公路交通科技,2005,22(12):67-70.(Liu Yangshao,Tian Qingyan,LüJianbing.Study on the light dynamic penetration to test coarse sand in bridge back-sand filling[J].Journal of Highway and Transportation Research and Development,2005,22(12):67-70.(in Chinese))
[10]杨海鸣,杨龙才,王炳龙.N10检验低路堤地基土承载力的研究[J].地下空间与工程学报,2008,4(2):99-104.(Yang Haiming,Yang Longcai,Wang Binglong.Study on the loading capacity detection by N10for the foundation of low subgrade[J].Chinese Journal of Underground Space and Engineering,2008,4(2):99-104.(in Chinese))
[2]温晓英,程子悦,郭晓光.大口径PCCP管在软土地基中的应用[J].中国给水排水,2012,28(2):1-4.(Wen Xiaoying,Cheng Ziyue,Guo Xiaoguang,Application of large diameter PCCP in soft soil foundation[J].China Water&Waste Water,2012,28(2):1-4.(in Chinese))
[3]尉红彬.低液限粉土路基施工质量检测新技术研究[J].公路交通科技(应用技术版),2010(12):46-48.(Wei Hongbin.Research on the new testing techniques for construction quality in low liquid limit silty soil subgrade[J].Journal of Highway and Transportation Research and Development(Application Technology Edition),2010(12):46-48.(in Chinese))
[4]王福胜.轻型动力触探在粉煤灰路堤压实度检验中的应用[J].公路,1997(11):46-49.(Wang Fusheng.Application of light dynamic penetration in compactness test for fly ash embankment[J].Highway,1997(11):46-49.(in Chinese))
[5]张涛,左德元.动力触探在路基压实度检测中的应用[J].路基工程,2006(6):140-141.(Zhang Tao,Zuo Deyuan.Application of dynamic penetration in compactness test for embankment[J].Subgrade Engineering,2006(6):140-141.(in Chinese))
[6]孙嘉良.既有线铁路路基密实状态检测方法研究[J].铁道建筑技术,2015(1):1-3.(Sun Jialiang.Research on test of the dense state of existing railway subgrade[J].Railway Construction Technology,2015(1):1-3.(in Chinese))
[7]Rej2ek K.Results of dynamic penetration test-an indicator of the compaction of surface soil horizons by forestry machinery[J].Journal of Forest Science,2011(10):439-450.
[8]张道政.轻型动力触探检测砂土相对密实度的试验研究[J].价值工程,2014(32):119-120.(Zhang Daozheng.Experimental study on sand relative compactness detection with light dynamic sounding[J].Value Engineering,2014(32):119-120.(in Chinese))
[9]刘仰韶,田卿燕,吕建兵.轻便触探检测公路桥涵台背回填中粗砂的试验方法研究[J],公路交通科技,2005,22(12):67-70.(Liu Yangshao,Tian Qingyan,LüJianbing.Study on the light dynamic penetration to test coarse sand in bridge back-sand filling[J].Journal of Highway and Transportation Research and Development,2005,22(12):67-70.(in Chinese))
[10]杨海鸣,杨龙才,王炳龙.N10检验低路堤地基土承载力的研究[J].地下空间与工程学报,2008,4(2):99-104.(Yang Haiming,Yang Longcai,Wang Binglong.Study on the loading capacity detection by N10for the foundation of low subgrade[J].Chinese Journal of Underground Space and Engineering,2008,4(2):99-104.(in Chinese))