施工技术 2016年7月上 22 CONSTRUCTION TECHNOLOGY 第45卷第13期 D01:10.7672/sjs2016130022 基坑工程预应力锚索施工问题现场试验研究* 帅海乐，詹黔花，龙举，张克利 (贵州中建建筑科研设计院有限公司（贵州省建筑科学研究检测中心），贵州贵阳550006) [摘要]针对基坑工程预应力错索施工过程中存在的3个问题进行研究：采用单根钢绞线张拉工艺，拉力和值作为 整束错索的拉力设计值；按照油压表反映荷载值张拉到1.05~1.1倍拉力设计值，进行锁定，不做锁定力检测或监 测；错索轴线与承压面不垂直，造成钢绞线在张拉端变角，形成折线错索.通过现场预应力测试及专项试验，分析 了上述问题对错索错固效果的影响，并提出了相应的改进措施. [关键词]基坑：预应力锚索：张拉；折线错索；试验 [中图分类号]TU476 [文献标识码]A [文章编号]1002-8498(2016)13-0022-06 Field Test Research on Outstanding Problems of Prestressed Anchor Cables in Foundation Excavation Construction Shuai Haile Zhan Qianhua Long Ju Zhang Keli China Construction of Guizhou Scientific Research and Design Institute Co.Lad. Inspection Center of Construction Science Research of Guizhou Prorince) Guiyang Guizhou 550006 China) Abstract:This paper discussed three problems in the construction process of prestressed anchor cables for foundation excavation:Using one-by-one tendon stretch technology then to summation each tension value as integral prestressed anchor cable design tension value;Lock the prestressed anchor cables when the oil pressure gauge display value to 1.05 ~1.I times of the design tension value not detecting or monitoring the prestress value.Prestressed anchor cable axis and the bearing plate surface is not vertical which led to broken line anchor at the end.Through the field test and special test the influence of the above problems on the anchoring effect is analyzed and the corresponding improvement measures are put forward. Key words:found...
基坑工程预应力锚索施工问题现场试验研究.pdf
