振动锤下钢护筒气举反循环清孔旋挖钻孔施工技术
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摘要
以江西省九江地区的德安集贸市场桩基工程为例,介绍了振动锤下钢护筒配套气举反循环清孔旋挖钻孔灌注桩施工技术应用情况及成桩关键技术措施。旋挖钻机在桩基工程施工中的成孔效率高,但在松散地层及容易坍塌地层中施工存在沉渣控制较为困难的问题,因此解决好该工程沉渣满足设计要求,是项目成功的关键所在。实践证明,采用振动锤下钢护筒隔离松散地层和容易坍塌地层以及气举反循环清孔相结合的措施,可彻底解决孔底沉渣过大的问题。
Taking the pile foundation project of the Dean market in Jiujiang area of Jiangxi Province as an example,this paper introduces the application and key technical measures of rotary drilled cast-in-place piles with air-lift reverse circulation hole cleaning and the vibration hammer for setting steel casing.The rotary drilling rig has a high efficiency in the construction of pile foundation,but control of settlements is difficult in the loose and collapsible stratums;therefore,it is the key to the success of the project to solve the problem with the settlements.Practice has proved that the combination of the vibrating hammer for setting casing to protect collapsible formation with the air lifting reverse circulation for cleaning can completely solve the problem of excessive settlements at the bottom of the hole.
Taking the pile foundation project of the Dean market in Jiujiang area of Jiangxi Province as an example,this paper introduces the application and key technical measures of rotary drilled cast-in-place piles with air-lift reverse circulation hole cleaning and the vibration hammer for setting steel casing.The rotary drilling rig has a high efficiency in the construction of pile foundation,but control of settlements is difficult in the loose and collapsible stratums;therefore,it is the key to the success of the project to solve the problem with the settlements.Practice has proved that the combination of the vibrating hammer for setting casing to protect collapsible formation with the air lifting reverse circulation for cleaning can completely solve the problem of excessive settlements at the bottom of the hole.
引文
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[2] JGJ 94-2008,建筑桩基技术规范[S].JGJ 94-200,Technical code for building pile foundations[S].
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[4]陈浩文,殷国乐,王艳丽,等.旋挖钻机用气动潜孔锤反循环硬岩钻进技术[J].探矿工程(岩土钻掘工程),2018,45(2):68-72.CHEN Haowen,YIN Guoyue,WANG Yanli,et al.Reversecirculation hard rock drilling technology with pneumatic DTH hammer for rotary drilling rig[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2018,45(2):68-72.
[5]杨联锋,刘成博.跨江特大桥旋挖钻孔灌注桩入海口水上施工实践[J].探矿工程(岩土钻掘工程),2017,44(9):89-92.YANG Lianfeng, LIU Chengbo.Over-water construction practice of rotary bored grouting pile at the estuary of Oujiang river[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2017,44(9):89-92.
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[7]李旺.旋挖钻孔灌注桩在泥质粉砂岩地区施工实践[J].探矿工程(岩土钻掘工程),2014,41(11):67-69.LI Wang.Construction practice of revolving bore grouting pile in argillaceous siltstone area[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2014,41(11):67-69.
[8]贾韶丽.钻孔灌注桩的施工及质量控制[J].西部探矿工程,2009,(8):14-16.JIA Shaoli.Construction and quality control of bore grouting pile[J].West-China Exploration Engineering,2009,(8):14-16.
[9]曾纪文,胡福洪,陈锋,等.气举反循环清理地下连续墙槽底沉渣数值分析[J].探矿工程(岩土钻掘工程),2017,44(12):71-74.ZENG Jiwen,HU Fuhong,CHEN Feng,et al.Numerical analysis on slag removal of diaphragm wall groove bottom by air-lift reverse circulation[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2017,44(12):71-74.
[10]倪俊,原海霞.气举反循环清渣方法的应用[J].探矿工程,2000,(6):28,30.NI Jun,YUAN Haixia.Application of air-lift reverse circulation slag cleaning method[J].Exploration Engineering(Drilling&Tunneling),2000,(6):28,30
[11]熊亮,张小连,熊菊秋,等.大口径工程井气举反循环钻进效率影响因素初探[J].探矿工程(岩土钻掘工程),2014,41(5):42-45,49.XIONG Liang,ZHANG Xiaolian,XIONG Juqiu,et al.Preliminary analysis on influence factors of air-lift reverse circulation drilling efficiency to large diameter engineering well[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2014,41(5):42-45,49.
[2] JGJ 94-2008,建筑桩基技术规范[S].JGJ 94-200,Technical code for building pile foundations[S].
[3]周红军.旋挖钻进技术适用性的初步研究[J].探矿工程(岩土钻掘工程),2009,36(8):39-45.ZHOU Hongjun.The study on applicability of rotary drilling technique[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2009,36(8):39-45.
[4]陈浩文,殷国乐,王艳丽,等.旋挖钻机用气动潜孔锤反循环硬岩钻进技术[J].探矿工程(岩土钻掘工程),2018,45(2):68-72.CHEN Haowen,YIN Guoyue,WANG Yanli,et al.Reversecirculation hard rock drilling technology with pneumatic DTH hammer for rotary drilling rig[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2018,45(2):68-72.
[5]杨联锋,刘成博.跨江特大桥旋挖钻孔灌注桩入海口水上施工实践[J].探矿工程(岩土钻掘工程),2017,44(9):89-92.YANG Lianfeng, LIU Chengbo.Over-water construction practice of rotary bored grouting pile at the estuary of Oujiang river[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2017,44(9):89-92.
[6]林礼进.优质泥浆在旋挖钻孔灌注桩护壁中的应用[J].探矿工程(岩土钻掘工程),2013,40(11):57-60,80.LIN Lijin.Application of high quality mud in wall protection for rotary bored pile engineering[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2013,40(11):57-60,80.
[7]李旺.旋挖钻孔灌注桩在泥质粉砂岩地区施工实践[J].探矿工程(岩土钻掘工程),2014,41(11):67-69.LI Wang.Construction practice of revolving bore grouting pile in argillaceous siltstone area[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2014,41(11):67-69.
[8]贾韶丽.钻孔灌注桩的施工及质量控制[J].西部探矿工程,2009,(8):14-16.JIA Shaoli.Construction and quality control of bore grouting pile[J].West-China Exploration Engineering,2009,(8):14-16.
[9]曾纪文,胡福洪,陈锋,等.气举反循环清理地下连续墙槽底沉渣数值分析[J].探矿工程(岩土钻掘工程),2017,44(12):71-74.ZENG Jiwen,HU Fuhong,CHEN Feng,et al.Numerical analysis on slag removal of diaphragm wall groove bottom by air-lift reverse circulation[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2017,44(12):71-74.
[10]倪俊,原海霞.气举反循环清渣方法的应用[J].探矿工程,2000,(6):28,30.NI Jun,YUAN Haixia.Application of air-lift reverse circulation slag cleaning method[J].Exploration Engineering(Drilling&Tunneling),2000,(6):28,30
[11]熊亮,张小连,熊菊秋,等.大口径工程井气举反循环钻进效率影响因素初探[J].探矿工程(岩土钻掘工程),2014,41(5):42-45,49.XIONG Liang,ZHANG Xiaolian,XIONG Juqiu,et al.Preliminary analysis on influence factors of air-lift reverse circulation drilling efficiency to large diameter engineering well[J].Exploration Engineering(Rock&Soil Drilling and Tunneling),2014,41(5):42-45,49.