沙河U形渡槽预应力张拉试验研究  

Prestress tension test and research of Shahe U-shape pre-stressed aqueduct

作　　者：张玉明 张明恩 张高伟[2] 冯光伟 马春安[2] 

机构地区：[1]河南省水利勘测设计研究有限公司,河南郑州450016 [2]南水北调中线干线工程建设管理局河南直管建管局,河南郑州450046

出　　处：《人民长江》2013年第16期46-50,共5页Yangtze River

基　　金："十一五"国家科技支撑计划重大项目"南水北调工程若干关键技术研究与应用之大流量预应力渡槽设计和施工技术研究"(2006BAB04A05);南水北调中线干线工程科技项目"大型预应力U形预制槽1:1原型试验和预应力张拉试验研究"(ZXJ/KY/YYL-001)

摘　　要：南水北调中线工程沙河渡槽为预应力渡槽。为了掌握预应力渡槽施加预应力后应力损失情况,于渡槽正式架设前,在施工现场建造了预应力锚索张拉试验台,对渡槽纵横向预应力锚固情况进行了测验与分析。介绍了张拉台的设计方案、测验过程及改进测试精度的措施。通过试验,获得了锚索孔道摩阻系数、锚固回缩损失、锚圈口锚力损失等重要参数,为设计和施工提供了依据。In order to master the prestress loss condition of Shahe aqueduct of Middle Route Project of South - to - North Water Diversion, before formal erection of the aqueduct, an anchor cable tension platform was built in site, and prestressed anchorage condition of the aqueduct in longitudinal and transversal directions was measured and analyzed. This paper introduces the design scheme of the tension platform, measurement process and improvement measures of measurement accuracy. Through measurement, the important parameters of the anchor - cable hole friction, anchoring shrinkage stress loss, anchor ring stress loss are obtained, which provided a basis for design and construction.

关 键 词：U形渡槽 预应力锚固测试 预应力损失计算 沙河渡槽 南水北调中线工程 

分 类 号：TV672.3[水利工程—水利水电工程]