钻孔灌注桩长螺旋钻机成孔先灌混凝土后插筋施工技术

作者:褚聚敏
单位:中铁十四局集团第五工程有限公司
摘要:某工程钻孔灌注桩项目采用长螺旋钻机预先成孔,随后通过中空螺旋钻杆将超流态混凝土压至钻头底部,边提钻边浇筑混凝土,浇筑完成后插入预制钢筋笼,插入时可使用振动锤。在此基础上,制定相应的施工工艺流程,对长螺旋钻机成孔、超流态混凝土灌注、钢筋笼制作及下插等关键施工技术进行分析。该技术有效促进成孔与混凝土浇筑一体化施工,避免泥浆污染,保证钢筋正确安装,提高钻孔灌注桩的成孔效率,降低施工成本。
关键词:桩基础钻孔灌注桩长螺旋钻机后插筋施工技术
作者简介:褚聚敏,工程师,E-mail:334688063@qq.com。
基金:中国铁建股份有限公司科技研究开发计划项目(14-C1)。 -页码-:110-112
尊敬的用户,本篇文章需要20元,点击支付交费后阅读
参考文献[1] 孙志斌.长螺旋成孔压灌混凝土成桩后插钢筋笼施工工艺在北京地铁施工中的应用[J].探矿工程(岩土钻掘工程),2006,33(2):36-38,41.
[2] 张琨,许立山,刘创,等.中国尊大厦超深基坑后注浆钻孔灌注桩施工技术[J].施工技术,2019,48(4):1-4.
[3] 梁成华,王之军,陈辉,等.超流态混凝土施工工艺在基坑超长支护桩工程中的应用[C]//第十八届全国探矿工程(岩土钻掘工程)技术学术交流年会,2015.
[4] 中国建筑科学研究院.建筑桩基技术规范:JGJ 94—2008[S].北京:中国建筑工业出版社,2008.
[5] OUCHI M. Mix-design and testing methods for self-compacting concrete[J]. Automation of concrete construction,1998,10(2):33-34.
[6] 冯忠绪.混凝土搅拌理论与设备[M].北京:人民交通出版社,2001.
[7] 张安民.基于定向钻机及随钻测量系统的定向长钻孔成孔工艺[J].煤矿安全,2016,47(3):90-93.
[8] 姜山.旋挖钻机成孔灌注桩在东非工程中的应用[J].江苏建材,2016(1):40-43.
[9] 项海燕,冉启东.旋挖钻机成孔灌注桩施工技术[J].交通世界(运输.车辆),2015(7):144-145.
[10] 罗伟,武岗松,宋承禹,等.灌注桩长螺旋钻机全护筒成孔施工技术[J].中国港湾建设,2013(1):76-79.
Construction Technology of Long Spiral Drilling Machine Hole-forming for Bored Pile by Prepouring Concrete and Post-inserted Reinforcement
CHU Jumin
(China Railway 14th Bureau Group No.5 Engineering Co.,Ltd.)
Abstract: According to a bored-pile project,long-spiral drilling machine was used in hole-forming in advance,and then super-fluid concrete was pressed to the bottom of the drill through hollow screw drill pipe,and the concrete was poured while lifting the drill. After pouring,prefabricated steel reinforcement cages were inserted, being assisted with vibrating hammers while inserting. Based on the above mentioned, corresponding construction technology process was formulated, and key construction technologies such as long-spiral hole-drilling,super-fluid concrete pouring,steel reinforcement cage production and insertion were analyzed. The technology proposed can effectively promote the integrative construction of hole-forming and concrete-pouring,avoid mud pollution,ensure the correct installation of steel reinforcement,improve the hole-forming efficiency of bored piles,and reduce construction cost.
Keywords: piles; bored pile; long spiral drilling; post-inserted reinforcement; construction
1000 0 0
文字:     A-     A+     默认 取消