钻孔灌注桩施工工艺与质量控制.doc

摘要钻孔灌注桩具有入土深、能入岩、刚度大、承载力高、桩身变形小，可方便地进行水下施工等优点，已被广泛应用到工程建设中。随着钻孔灌注桩应用的日益扩大，如何保证工程质量成为首要问题。虽然钻孔灌注桩施工正日益完善，但往往由于工艺不当、管理不严，断桩、堵管、夹泥、蜂窝、少灌等质量问题时有发生。因此，运用科学的施工工艺，加强过程控制以确保工程质量显得极为重要。本文通过阐述钻孔灌注桩施工工艺，归纳质量控制点，总结常见质量问题，分析质量事故发生的原因，研究相应的处理对策，找出了质量控制的途径，从而保证了钻孔灌注桩施工质量。关键词：钻孔灌注桩；施工工艺；质量控制点；事故预防AbstractTheboredcast-in-placepilehasthefollowingadvantages,suchasaccessingthesoildeeply,accessingtherockstratum,highrigidityandbearingcapacity,smalldefomation,andconvenienttounderwater,hasalreadybeenappliedtoengineeringconstructionextensively.Whiletheapplicationoftheboredcast-in-placepileexpansionwidely,ithasbecomethefirstquestionhowtoguaranteetheprojectquality.Althoughconstructionconsummatesdaybyday,forimpropercraftandtheconstructcontrolnotstrict,thequalityaccidentsuchasbreakingthepile,topingupthetube,clampingtheputty,thehoneycomb,lessfillingandsoonsometimes.Therefore,itisextremelyimportantlythatutilizationofscienceconstructioncrafttostrengthentheprocesscontrol.Inthispapertheconstructioncraftofboredcast-in-placepileareelaborated,thequalitycontrolpointareinduced,thequalityquestionsaresummarized,thereasonqualityaccidenthappenedareanalyzed,thecorrespondingcountermeasureareresearch,thequalitycontrolwayarefound,thequalityofboredcast-in-placepileconstructioncanbeensured.Keywords:boredpile;constructioncraft;qualitycontrolpoint;accidentprevention目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc264487428"引言PAGEREF_Toc264487428\h2HYPERLINK\l"_Toc264487429"一、钻孔灌注桩概述PAGEREF_Toc264487429\h-1-HYPERLINK\l"_Toc264487430"1.钻孔灌注桩的发展历史PAGEREF_Toc264487430\h-1-HYPERLINK\l"_Toc264487431"2.钻孔灌注桩的发展动向PAGEREF_Toc264487431\h-2-HYPERLINK\l"_Toc264487432"3.钻孔灌注桩的特点PAGEREF_Toc264487432\h-3-HYPERLINK\l"_Toc264487433"二、钻孔灌注桩施工PAGEREF_Toc264487433\h-4-HYPERLINK\l"_Toc264487434"2.1钻孔灌注桩施工准备工作PAGEREF_Toc264487434\h-4-HYPERLINK\l"_Toc264487435"2.2钻孔灌注桩施工工艺PAGEREF_Toc264487435\h-6-HYPERLINK\l"_Toc264487436"2.2.1反循环钻孔施工工艺PAGEREF_Toc264487436\h-6-HYPERLINK\l"_Toc264487437"2.2.2正循环钻孔