空腔锚块式预应力闸墩结构受力性能试验研究  

Mechanical Behavior of Prestressed Gate Pier with Hollow Anchor Block

作　　者：李树山[1,2] 高丹盈[1] 解伟[2] 

机构地区：[1]郑州大学水利与环境学院,郑州450002 [2]华北水利水电学院,郑州450011

出　　处：《长江科学院院报》2012年第12期99-102,108,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金(50779018);河南省科技创新杰出人才项目(094200510011);河南省教育厅自然科学研究项目(2009A570001)

摘　　要：由于闸墩结构设计受颈部应力状态制约,预应力技术成为改善大型弧门闸墩结构受力性能的重要措施。锚块结构特征及其对颈部受力的影响是大型弧门闸墩结构设计时需要考虑的主要问题。利用结构仿真模型试验,以蒲石河电站排沙闸预应力闸墩为例,研究了锚块内设置空腔引起的颈部抗裂性能、锚块内应力分布的变化,讨论了空腔锚块对预应力闸墩结构受力性能的影响。试验结果表明,新型空腔式锚块设计方案能够有效地提高预应力闸墩颈部的预压效果,提高闸墩颈部抗裂性能。Since the design of gate pier is usually constrained by the stress condition at the neck,the prestress technique becomes an important measure to improve mechanical behavior of the large-sized arch gate pier.One of the most important problems is the anchor block＇s structure characteristic and its effect on the stress condition at the neck.Through structure simulation model test,we investigated the variations of crack resistance at the neck and stress distribution in the anchor block caused by setting a cavity in the anchor block,and discussed the effect of hollow anchor block on the mechanical behavior of gate pier.The prestressed pier of Pushi River pumped storage power station was taken as a case study.The results showed that the design of the new type hollow anchor block could enhance the prestressed effect at the neck of the pier effectively,and improve the crack resistance of the neck.

关 键 词：预应力闸墩 模型试验 空腔式锚块 受力性能 预应力锚束 

分 类 号：TV662.2[水利工程—水利水电工程] TV32