利用温度检测钻孔灌注桩混凝土拌合物面的研究
|
摘要
基于水化放热原理和室内外试验,发现混凝土拌合物层和浮浆层两者有明显的温差,显示可通过温度变化来确定混凝土拌合物灌注高度。据此设计了一种便携式用于判定混凝土拌合物面是否到达设计高度的温控式装置:在设计桩顶高度位置及其下方50 cm处分别埋置一个温度传感器,在设计桩顶高度下方50 cm的温度传感器获得混凝土拌合物的温度峰值,利用设计桩顶高度位置的温度传感器的温度峰值判定混凝土拌合物顶。建议混凝土拌合物超灌在设计桩顶高度位置即第2个温度传感器上方50 cm,比规范要求少超灌0.3 m,能节约混凝土。
Based on the principle of hydration heat release and indoor and outdoor tests,it is found that there is a significant temperature difference between the concrete mixture layer and the floating slurry layer,indicating that the pouring height of the concrete mixture can be determined by the temperature change. A portable temperature control device is designed to determine whether the concrete mixing surface reaches the designed height,that is to say,a temperature sensor is respectively embedded at the height of the designed pile top and at the height of 50 cm below,and the temperature sensor of 50 cm below the height of the designed pile top is used to obtain the temperature peak of the concrete mixture,and then the temperature peak of the temperature sensor at the height of the designed pile top is used to determine the concrete mixture top. It is suggested that the concrete mixture should be overfilled at the height of the designed pile top,namely 50 cm above the second temperature sensor,which is 0.3 m less than the norm and can save concrete.
Based on the principle of hydration heat release and indoor and outdoor tests,it is found that there is a significant temperature difference between the concrete mixture layer and the floating slurry layer,indicating that the pouring height of the concrete mixture can be determined by the temperature change. A portable temperature control device is designed to determine whether the concrete mixing surface reaches the designed height,that is to say,a temperature sensor is respectively embedded at the height of the designed pile top and at the height of 50 cm below,and the temperature sensor of 50 cm below the height of the designed pile top is used to obtain the temperature peak of the concrete mixture,and then the temperature peak of the temperature sensor at the height of the designed pile top is used to determine the concrete mixture top. It is suggested that the concrete mixture should be overfilled at the height of the designed pile top,namely 50 cm above the second temperature sensor,which is 0.3 m less than the norm and can save concrete.
引文
[1]邵春,鄢泰宁,兰凯,等.超声波测钻孔灌注桩混凝土拌合物灌注面高程的研究[J].工程勘察,2009(6):74-78.Shao C,Yan T N,Lan K,et al.Study on altitude measurement of concrete injection surface of bored pile with ultrasonic wave[J].Geotechnical Investigation&Surveying,2009(6):74-78.
[2]付祖良.钻孔灌注桩水下混凝土拌合物灌注技术研究与应用[D].武汉:华中科技大学,2006.Fu Z L. Research and Application on the Technology of Pouring Concrete of Bored Piles Under Water[D]. Wuhan:Huazhong University of Science&Technology,2006.
[3] Du P,Liu X L,Fan J L,et al. Review of Research on Elevation Positioning of Concrete Filling Surface of Bored Piles[C]//2018International Conference on Civil and Hydraulic Engineering,Qingdao,China,Institute of Physics Publishing,2018.
[4]李亮亮,卢士涛,冯玉国,等.低标高桩顶水下钻孔灌注桩混凝土拌合物超灌高度控制装置研制[J].施工技术,2017,46(1):36-38.Li L L,Lu S T,Feng Y G,et al. Development of control device of concreting in excess for bored pile underwater with low elevation pile head[J]. Construction Technology,2017,46(1):36-38.
[5]张磊,崔建军,李建辉.超长细比钻孔灌注桩施工技术研究[J].建筑技术开发,2017,44(20):92-94.Zhang L,Cui J J,Li J H. Study on constrution technique of super slenderness ratio bord pile[J]. Building Technology Development,2017,44(20):92-94.
[6]张海滨,孙杰,等.混凝土拌合物灌注桩灌注高度控制装置及其使用方法[P].中国专利,CN106013160 A,2016-10-12.Zhang H B,Sun J,et al. Filling Height Control Device of Concrete Mixture in Bored Piles and its Application Method[P]. Chinese Patent,CN106013160A,2016-10-12.
[7]兰凯.钻孔桩砼灌面超声波测量的关键技术及其实现[D].北京:中国地质大学,2008.Lan K. Key technologies on using ultrasonic method for concrete casting level measurement in borded pile foundation and its realization[D]. Beijing:China University of Geosciences,2008.
[8]连绍平.采用探测杆测定桩顶砼面[J].探矿工程,1999(3):38.Lian S P. The concrete surface at the top of pile is measured by detecting rod[J]. Exploration Engineering,1999(3):38.
[9]朱景萍,刘留春,贺学庆,等.灵江特大桥大直径水下钻孔灌注桩施工技术[J].建筑施工,2007,29(3):211-213.Zhu J P,Liu L C,He X Q,et al. Construction technology of underw ater big diam eter bored pile for Linjiang super large bridge[J]. Building Construction,2007,29(3):211-213.
[10]张国强,曹惠宾.水下混凝土拌合物超灌标高定位研究[J].地质装备,2006(4):33-35.Zhang G Q,Cao H B. Study on the pouring elevation of underwater concrete[J]. Equipment for Geotechnical Engineering,2006(4):33-35.
[11]陈德强.采用水下混凝土拌合物灌注标高定位仪进行标高定位的研究[J].价值工程,2018:126-128.Chen D Q. Research on elevation positioning using underwater concrete pouring elevation locator[J]. Value Engineering,2018:126-128.
[2]付祖良.钻孔灌注桩水下混凝土拌合物灌注技术研究与应用[D].武汉:华中科技大学,2006.Fu Z L. Research and Application on the Technology of Pouring Concrete of Bored Piles Under Water[D]. Wuhan:Huazhong University of Science&Technology,2006.
[3] Du P,Liu X L,Fan J L,et al. Review of Research on Elevation Positioning of Concrete Filling Surface of Bored Piles[C]//2018International Conference on Civil and Hydraulic Engineering,Qingdao,China,Institute of Physics Publishing,2018.
[4]李亮亮,卢士涛,冯玉国,等.低标高桩顶水下钻孔灌注桩混凝土拌合物超灌高度控制装置研制[J].施工技术,2017,46(1):36-38.Li L L,Lu S T,Feng Y G,et al. Development of control device of concreting in excess for bored pile underwater with low elevation pile head[J]. Construction Technology,2017,46(1):36-38.
[5]张磊,崔建军,李建辉.超长细比钻孔灌注桩施工技术研究[J].建筑技术开发,2017,44(20):92-94.Zhang L,Cui J J,Li J H. Study on constrution technique of super slenderness ratio bord pile[J]. Building Technology Development,2017,44(20):92-94.
[6]张海滨,孙杰,等.混凝土拌合物灌注桩灌注高度控制装置及其使用方法[P].中国专利,CN106013160 A,2016-10-12.Zhang H B,Sun J,et al. Filling Height Control Device of Concrete Mixture in Bored Piles and its Application Method[P]. Chinese Patent,CN106013160A,2016-10-12.
[7]兰凯.钻孔桩砼灌面超声波测量的关键技术及其实现[D].北京:中国地质大学,2008.Lan K. Key technologies on using ultrasonic method for concrete casting level measurement in borded pile foundation and its realization[D]. Beijing:China University of Geosciences,2008.
[8]连绍平.采用探测杆测定桩顶砼面[J].探矿工程,1999(3):38.Lian S P. The concrete surface at the top of pile is measured by detecting rod[J]. Exploration Engineering,1999(3):38.
[9]朱景萍,刘留春,贺学庆,等.灵江特大桥大直径水下钻孔灌注桩施工技术[J].建筑施工,2007,29(3):211-213.Zhu J P,Liu L C,He X Q,et al. Construction technology of underw ater big diam eter bored pile for Linjiang super large bridge[J]. Building Construction,2007,29(3):211-213.
[10]张国强,曹惠宾.水下混凝土拌合物超灌标高定位研究[J].地质装备,2006(4):33-35.Zhang G Q,Cao H B. Study on the pouring elevation of underwater concrete[J]. Equipment for Geotechnical Engineering,2006(4):33-35.
[11]陈德强.采用水下混凝土拌合物灌注标高定位仪进行标高定位的研究[J].价值工程,2018:126-128.Chen D Q. Research on elevation positioning using underwater concrete pouring elevation locator[J]. Value Engineering,2018:126-128.
© 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 |