岩溶地区旋挖钻孔后植预应力管桩施工技术
|
摘要
结合中国-东盟信息港南宁核心基地智慧生活民生工程项目,通过前期准备、埋设护筒、旋挖机钻、成孔、浇筑混凝土、控制吊桩和打桩、接长送桩、截桩一系列施工技术,有效解决PHC管桩难以贯入硬质岩层的难题,使预应力管桩成为嵌岩桩,并详细阐述硬质岩层下旋挖成孔后灌注细石混凝土,再将PHC管桩同心植入形成的一种新型劲性复合桩施工技术,取得良好的社会效益和经济效益。
Combined with China-Asean Information Port Nanning core base smart life livelihood project,through a series of construction technologies,such as preliminary preparation,burying protective pipe,rotary excavator drilling,hole forming,concrete pouring,control lifting pile and driving pile,extension and delivery pile,cutting pile,it effectively solves the problem that PHC pipe pile is difficult to penetrate into hard rock,make prestressed pipe pile into rock-socketed pile,in addition,a new construction technology of stiffening composite pile,which is formed by placing PHC pipe pile concentrically,is described in detail,and has achieved good social and economic benefits.
Combined with China-Asean Information Port Nanning core base smart life livelihood project,through a series of construction technologies,such as preliminary preparation,burying protective pipe,rotary excavator drilling,hole forming,concrete pouring,control lifting pile and driving pile,extension and delivery pile,cutting pile,it effectively solves the problem that PHC pipe pile is difficult to penetrate into hard rock,make prestressed pipe pile into rock-socketed pile,in addition,a new construction technology of stiffening composite pile,which is formed by placing PHC pipe pile concentrically,is described in detail,and has achieved good social and economic benefits.
引文
[1]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.
[2]杨森.新型螺旋成孔根植注浆竹节管桩抗压抗拔承载特性研究[D].杭州:浙江大学,2013.
[3] TAKASHI H,MADAN B. KARKEE. Load tests on bored PHC nodular piles in different ground conditions and the bearing capacity based on simple soil parameters[C]//日本建筑学会计算报告集,1995.
[4]安疆锋.预钻孔在PHC管桩施工中的应用[J].山西建筑,2005(14):92-93.
[5]中国建筑科学研究院.建筑桩基础技术规范:JGJ 94—2008[S].北京:中国建筑工业出版社,2008.
[6]贾青山,郭鹏,刘赛,等.复杂地质条件下长螺旋引孔辅助预应力管桩施工技术[J].建筑施工,2018,40(4):453-454.
[7]彭超,徐迎.泥浆护壁钻孔灌注桩桩芯位置偏移质量控制对策分析[J].施工技术,2019,48(4):103-105.
[2]杨森.新型螺旋成孔根植注浆竹节管桩抗压抗拔承载特性研究[D].杭州:浙江大学,2013.
[3] TAKASHI H,MADAN B. KARKEE. Load tests on bored PHC nodular piles in different ground conditions and the bearing capacity based on simple soil parameters[C]//日本建筑学会计算报告集,1995.
[4]安疆锋.预钻孔在PHC管桩施工中的应用[J].山西建筑,2005(14):92-93.
[5]中国建筑科学研究院.建筑桩基础技术规范:JGJ 94—2008[S].北京:中国建筑工业出版社,2008.
[6]贾青山,郭鹏,刘赛,等.复杂地质条件下长螺旋引孔辅助预应力管桩施工技术[J].建筑施工,2018,40(4):453-454.
[7]彭超,徐迎.泥浆护壁钻孔灌注桩桩芯位置偏移质量控制对策分析[J].施工技术,2019,48(4):103-105.