孔道成孔工艺对锚固力损失的分析与控制

山东大学学报(工学版) ›› 2009, Vol. 39 ›› Issue (4): 145-148.

孔道成孔工艺对锚固力损失的分析与控制

王清标

山东大学岩土与结构工程研究中心，山东济南 250061；山东科技大学资源与土木工程系，山东泰安 271019

收稿日期:2009-05-04 出版日期:2009-08-24 发布日期:2009-08-24
作者简介:王清标(1973-),男,山东新泰人,讲师,博士后,研究方向为预应力锚固工程. E-mail:wangqingbiao@tom.com

Analysis and control of pre-stressing loss in construction techniques of anchor-eye

1.Geotechnical and Structural Engineering Research Center, ShandongUniversity, Jinan 250061， China;
2. Departmentof resource and civil engineering of Shandong University of Science and Technology, Taian 271019, China

Received:2009-05-04 Online:2009-08-24 Published:2009-08-24

摘要/Abstract

摘要：

预应力锚索锚固作用机理复杂,影响预应力锚固效果的因素众多,锚固力损失与材料性质、被锚固介质力学特性、锚夹具质量、施工工艺等因素有关.研究了锚索施工工艺中孔道成孔工艺对锚索锚固力损失的影响及控制措施,通过数学手段分析了孔道弯曲和孔道偏差影响,推导出了孔道摩擦损失理论计算公式.研究表明:孔道摩擦损失理论计算公式更加符合工程实际,具有较大的实用价值;钻孔的孔斜率与锚固力沿程损失具有相关性,孔斜率越大,锚索锚固力损失也越大,在相同的孔斜率n条件下,锚索张拉荷载P越大锚固力损失也越大;通过相应的工程措施可以减少孔道成孔引起的锚固力损失.

关键词: 成孔工艺, 锚固力损失, 分析, 控制

Abstract:

The mechanism of the anchoring effect of the anchorage cable is very complicated because there are many factors including the materials, the anchor clamping, the quality of anchorage cable and the construction techniques. The effects and control method of the construction techniques on the prestressing loss were studied. Based on the analysis of anchor eye bending and its deviation, a theoretical formula of prestressing loss of friction was deduced, which accords with the practice of engineering and has more practical meaning. The results showed that the pore theory formula for calculating friction loss works more in line with engineering practice. The hole slope of the drilling anchor holes had relativity with the loss of power, that was, when the hole slope became larger, the power loss of the anchoring cable gets larger. With the same slope n, anchor pullloading (P) became greater as the loss of anchoring force became larger.The anchor force loss caused by channel pore forming could be reduced by the adoption of appropriate measures.

Key words: construction technics of anchor eye, prestressing loss, , analysis, control

王清标. 孔道成孔工艺对锚固力损失的分析与控制[J]. 山东大学学报(工学版), 2009, 39(4): 145-148.

WANG Qing-Biao. Analysis and control of pre-stressing loss in construction techniques of anchor-eye[J]. JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE), 2009, 39(4): 145-148.

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