Load compensation research on twicetension for loop anchor cable of inner lining in Yellow River-crossing tunnel  

作　　者：Yin Juan Cao Shengrong Qin Gan Yang Fan 

机构地区：[1]State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University

出　　处：《Engineering Sciences》2014年第1期77-86,共10页中国工程科学（英文版）

基　　金：National Natural Science Foundation of China(No.51079107);Fundamental Research Funds for the Central Universities(No.5082022)

摘　　要：The load compensation equipment for anchor cable named low retraction prestressed anchorage system with twice-tension(referred to as twice-tension anchorage system) is proposed in the paper. Calculation results of loop anchorage prestressing loss(PL) values of inner lining(IL)in Yellow River-crossing tunnel under two anchorage systems,including twice- tension anchorage system and HM(Chinese transliteration is huanmao)anchorage system,are introduced. The software ANSYS is selected to realize the three-dimensional(3D) finite element modeling to accomplish simulation and calculation works under the two anchorage systems,respectively. Stress processes of IL under the two working conditions,of which one is completed cable tensioning(CCT) and the other is water in the tunnel with the designed water pressure(DWP),are contrasted and analyzed. Impacts of prestressing forces of anchor cables on structural safety under the two anchorage systems are contrasted. The calculation results show that the twice-tension anchorage system can reduce PL effectively and then increase prestresses of wall concrete(WC). Meanwhile,the anchorage system has the advantages of improving security and stability of tunnel structure,reducing project costs and saving steel consumption. The research work is available to related design and construction of anchor cable,and is worthy of promotion and application.

关 键 词：loop anchorage prestressing loss twice-tension load compensation nonlinear finite element Yellow River-crossing tunnel 

分 类 号：TU452[建筑科学—岩土工程] P642.22[建筑科学—土工工程]