|Table of Contents|

Effect of Assembling Mode on Structural Internal Force of Cross-river Electric Power Shield Tunnel with Large Cross-section(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年06期
Page:
112-118
Research Field:
Publishing date:

Info

Title:
Effect of Assembling Mode on Structural Internal Force of Cross-river Electric Power Shield Tunnel with Large Cross-section
Author(s):
CAO Song-yu1;  YUAN Jun2;  TU Xin-bin2;  FENG Kun1;  ZHANG Xiao-yang2;  SU Ang1
(1. Key Laboratory of Transportation Tunnel Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. State Grid Corporation of China, Beijing 100031, China)
Keywords:
electric power shield tunnel;  assembling mode;  lining deformation;  structural internal force;  beam-spring model
PACS:
TU311
DOI:
-
Abstract:
In view of the significant influence of segment assembly mode on the internal force of tunnel structure when the electric power shield tunnel with large cross-section crossed the Yangtze River, the lining structure of shield tunnel in Sutong GIL comprehensive pipe gallery project was taken as the research object, the beam-spring model was used to simulate the segment structure, and the load-structure model was used to calculate the load of segment structure. The mechanical behavior of the lining structure under different assembling modes was studied, and the effect of assembling modes on the internal force of the transmission shield tunnel structure was explored. The results show that the internal force of segment structure is controlled by staggered joint assembling and the deformation of segment is controlled by through joint assembling. The mechanical performance of the through joint assembly is better than that of the staggered joint assembly, but the deformation of the through joint assembly is larger, so it should be selected according to the use requirements during the construction. The mechanical behavior of segment structure is different under different assembling modes, which is related to the position of capping block, staggered joint angle, circular direction of target ring and position of longitudinal joint. The assembling mode has great influence on the maximum shape variable, the maximum positive bending moment and the maximum negative bending moment of the segment, but has little influence on the maximum axial force of the segment. In staggered joint assembly, try to avoid staggered joint angle of 180° and the most ideal staggered joint angle of 32.7°-81.8°. The conclusion can provide reference for the segment assembly of transmission shield tunnel.

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Last Update: 2019-11-26