水电工程预应力锚固设计规范word版

DL/T5176—20031ICS27.140P59备案号：J225—2003中华人民共和国电力行业标准PDL/T5176—2003水电工程预应力锚固设计规范DesignspecificationofPrestressedanchorageforHydropowerproject2003-01-09发布2003-06-01实施中华人民共和国国家经济贸易委员会发布DL/T5176—20032目次前言··········································································Ⅲ1范围······································································12规范性引用文件·······················································23总则······································································34术语与符号·····························································44.1术语和定义··························································44.2符号··································································75一般规定································································95.1基本资料·····························································95.2预应力锚杆材料·····················································95.3锚固设计的基本内容················································116锚杆体的选型与设计·················································136.1锚杆体的选型························································136.2锚杆体的结构设计···················································146.3锚杆体的防护设计···················································166.4张拉力的控制和张拉程序设计······································177边坡锚固································································198基础锚固································································219地下洞室锚固··························································229.1围岩锚固·····························································229.2岩壁吊车梁锚固·····················································2310预应力闸墩锚固设计···············································2511预应力水工隧洞环形锚固设计···································2612水工建筑物的补强与锚固·········································2713试验与监测···························································2813.1锚杆试验····························································2813.2锚杆体的原位监测·················································28附录A（规范性附录）胶结材料与围岩的黏结强度···········30附录B（规范性附录）预应力锚杆锚固试验····················31条文说明····································································33DL/T5176—20033前言在我国水电水利工程中，应用预应力锚固技术对岩体边坡、地下洞室、建筑物基础、闸墩、水工隧洞等各类结构进行加固或改善应力，取得了良好的效果和一定的经济效益，并积累了丰富经验。为推广应用预应力锚固技术，提高预应力锚固的效能和技术水平，促进水电工程锚固技术的发展，国家经济贸易委员会以电力［2000］22号文《关于确认1999年度电力行业标准制修订计划项目的通知》下达了编制《水电工程预应力锚固设计规范》的任务。水电规划设计标准化技术委员会于2000年12月在北京召开了《水根据大纲审查会纪要的要求，编制组全面总结了我国预应力锚固技术的应用经验，完成了《水电水利工程预应力锚固技术的应用》、《有关国家和地区预应力锚固规范简介》、《水工隧洞环形锚束式预应力混凝土衬砌》和《〈水电工程预应力锚固设计规范〉按可靠度理论转轨和套改专题研究报告》等四份专题报告，在此基础上于2001年8月提出了规范初稿，2002年2月提出了规范送审稿。电力行业水电规划设计标准化技术委员会于2002年4本标准是应用预应力锚固技术对岩体或水工建筑物实施加固的设计规范，应与其他相关标准配套使用。本标准的结构安全度是根据GB50199《水利本标准的附录A、附录B本标准由电力行业水电规划设计标准化技术委员会提出、归口并负责解释。本标准参加起草单位：西北勘测设计研究院，武汉大学土木建筑工程学院。本标准主要起草人为：赵长海、苏加林、沈义生、王槟、吕祖珩、黄福德、侯建国、程燕、舒征、苏萍、王文奇、朱振家、李金祥、马军、赵玉江、DL/T5176—200341范围本标准规定了用于加固岩体和水工建筑物的预应力锚杆的设计原则和方123各种水工建筑物的基4567DL/T5176—200352规范性引用文件下列文件中的条款通过本标准引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改（不包括勘误的内容）或修订均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最GB175GB50287DL/T5057水工混凝土结构JGJ/T92SD134DL/T5176—200363总则3.0.1锚固设计应以充分利用围岩和岩体的承载能力为基本原则，在地质调查的基础上，根据工程的稳定性和结构应力分析的有关资料，对锚固措3.0.2预应力锚固工程的地质勘察应根据锚固对象的建筑物等级，按GB502873.0.3预应力锚固工程可采用理论分析和工程类比法设计，重要工程还应根据原位监测结果进行修正，并根据监测结果分析锚固效果，对锚固后的3.0.4DL/T5176—200374术语与符号4.1术语和定义下列术语和定义适用于本标准。4.1.1预应力锚固Prestressedanchorage通过对锚杆（索）施加张拉力，使岩体或混凝土结构物达到稳定状态或改4.1.2预应力锚杆Prestressedanchors施加预应力后的锚杆。本标准将锚杆、锚束统称为锚4.1.3锚束Tensilereinforcingbars数股钢丝、钢绞线或钢筋，按一定规律编排成束的构件。亦称锚索。在预应力闸墩或预应力衬砌中又习惯称为锚束或锚索。4.1.4永久性预应力锚杆Permanentprestressedanchors在永久性工程中布置的使用年限为2年以上的预应力锚杆。4.1.5临时性预应力锚杆Temporaryprestressedanchors在临时性工程中布置的和在永久性工程中布置的使用年限为2年以内的预4.1.6张拉锚杆Tensileanchors4.1.7砂浆锚杆groutedanchorbar以普通螺纹钢材为杆体，在锚杆全孔充填水泥砂浆、快硬水泥砂浆或4.1.8锚杆体Bodyofanchors预应力锚杆的整体。包括内锚固段、张拉段、外锚头及相连接的所有DL/T5176—200384.1.9内锚固段Inneranchoredsection预应力锚杆体的内部持力端。它是用胶结材料或用金属加工的机械装置使锚杆内端与被锚固体深4.1.10张拉段Tensilesection对预应力锚杆施加拉力时可以自由伸长的部分，当锚杆锁定后依靠自4.1.11外锚头Outerfixedend4.1.12有黏结预应力锚杆Prestressedanchorswithbond锚杆锁定后，张拉段与被锚固介质无相对滑动的预应力锚杆。4.1.13无黏结预应力锚杆Prestressedanchorswithoutbond锚杆张拉锁定后，张拉段与被锚固介质之间能相对移动的预应力锚杆。4.1.14预应力钢材强度利用系数Utilizationfactoronthestrengthofprestressedanchors当预应力锚杆的张拉力达到设计值时，锚杆材料的平均应力值与锚杆4.1.15设计张拉力Designtension根据锚固设计需要，并考虑一定安全余度和由于岩体流变、混凝土徐变及钢材松弛可能引起的预应力损失后，确定的每根锚杆应施加的张拉荷4.1.16超张拉力Extradesigntension为消除由于锚杆与孔壁的摩擦、锚具的压缩和锚束的回缩而引起的预应力损失，施工时将设计张拉力提高后的实际张拉荷载。DL/T5176—200394.1.17安装荷载Loadofinstallation4.1.18永存张拉荷载Eternaltensileload4.1.19预张拉Pretension预应力锚杆正式张拉作业之前，为使锚束中各股钢丝或钢绞线受力均4.1.20补偿张拉Compensatorytension4.1.21压力型锚固段Anchoredsectiononthecompressiontype采用无黏结预应力锚杆，并通过改变锚固段结构型式的办法，使内锚固段由受拉状态变为受压状态，用内锚固段的压缩传递张拉力，此时锚固4.1.22压力集中型锚固段Anchoredsectiononthecompression-concentrationtype内锚固段采用一个承载体，对预应力锚杆施加的张拉力全部集中在一4.1.23压力分散型锚固段Anchoredsectiononthecompression-dispersiontype内锚固段采用多个承载体，对预应力锚杆施加的张拉力，分散在每一4.2符L——L1——L2——DL/T5176—200310L3——Pm——P——c——D——n——A——q——P1——P2——P3——P0————————0————d——p——c——Q——k——pk——qk——s——q——SGK——SQK——G——Q——fptk——Ap——DL/T5176—2003115一般规定5.1基本资料5.1.1123455.1.2123围岩质量、主要构造的产状、各种结构面的组合关系及地下水的资料。4锚固工程所涉及部位岩体的抗压强度、抗拉强度、变形模量、岩体重度、声波速度、岩体的