Numerical Analysis of Three-Layer Deep Tunnel Composite Structure

作     者：Weiwei Sun Hongping Min Jianzhong Chen Chao Ruan Yanjun Zhang Lei Wang 

作者机构：Hubei Key Laboratory of Theory and Application of Advanced Materials MechanicsSchool of ScienceWuhan University of TechnologyWuhan430070China China Construction Third Bureau Green Industry Investment Co.Ltd.Wuhan430035China Fujian Lutong Pipe Technology Co.Ltd.Quanzhou362000China 

出 版 物：《Computer Modeling in Engineering & Sciences》 (工程与科学中的计算机建模（英文）)

年 卷 期：2021年第127卷第4期

页      面：223-239页

核心收录：

学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0835[工学-软件工程] 0813[工学-建筑学] 0814[工学-土木工程] 0811[工学-控制科学与工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：This project was supported by the Fundamental Research Funds for the Central Universities(WUT:2018IB001) the Fundamental Research Funds for the Central Universities(WUT:2019III130CG) 

主　　题：GFRP pipe deep tunnel structure finite element analysis internal pressure external pressure stability pipe-soil interaction 

摘      要：To date,with the increasing attention of countries to urban drainage system,more and more regions around the world have begun to build water conveyance tunnels,sewage pressure deep tunnels and so ***,the sufficient bearing capacity and corrosion resistance of the structure,which can ensure the actual service life and safety of the tunnel,remain to be further *** Fiber Reinforced Plastics(GFRP)pipe,with light weight,high strength and corrosion resistance,has the potential to be applied to the deep tunnel *** paper proposed a new composite structure of deep tunnel lined with GFRP pipe,which consisted of three layers of concrete segment,cement paste and GFRP pipe.A new pipe-soil spring element model was proposed for the pipesoil interaction with *** on the C3D8R solid model and the Combin39 spring model,the finite element numerical analysis of the internal pressure status and external pressure stability of the structure was carried *** with the checking calculation of the theoretical formula,the reliability of the two finite element models was confirmed.A set of numerical analysis methods for the design and optimization of the three-layer structure was *** results showed that from the internal GFRP pipe to the outer concrete pipe,the pressure decreased from 0.5 to 0.32 MPa,due to the internal pressure was mainly undertaken by the inner GFRP *** allowable buckling pressure of GFRP pipe under the cover of 5 GPa high modulus cement paste was 2.66 *** application of GFRP pipe not only improves the overall performance of the deep tunnel structure but also improves the construction quality and *** three-layer structure built in this work is safe and economical.