MECHANICAL MECHANISM ANALYSIS AND INFLUENCING FACTORS OF SUBWAY CROSS PASSAGE CONSTRUCTION

KE WU; SHUAISHUAI CUI; QIANJIN ZHANG; ZHENG ZHANG; JIAHUI ZHAO; YALIN YU

doi:10.1590/1679-78255512

MECHANICAL MECHANISM ANALYSIS AND INFLUENCING FACTORS OF SUBWAY CROSS PASSAGE CONSTRUCTION

Authors

KE WU SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-8091-1124
SHUAISHUAI CUI SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-8774-5472
QIANJIN ZHANG SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-0223-3954
ZHENG ZHANG SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-1730-4372
JIAHUI ZHAO SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-6165-8661
YALIN YU SCHOOL OF CIVIL ENGINEERING, SHANDONG UNIVERSITY, JINAN, CHINA HTTPS://ORCID.ORG/0000-0002-3283-7548

DOI:

https://doi.org/10.1590/1679-78255512

Abstract

THE CONSTRUCTION OF THE CROSS PASSAGE CHANGES THE MAIN TUNNELS SEGMENT FROM A COMPLETE CYLINDRICAL STRUCTURE TO A NOTCHED UNSTABLE STRESSED STRUCTURE. THUS, THE OVERALL FORCE (BENDING AND SHEARING) PERFORMANCE OF THE MAIN TUNNELS IS CONSIDERABLY DECREASED. THE EXCAVATION OF THE CROSS PASSAGE ALSO DESTROYS THE STABILITY OF THE ORIGINAL SOIL LAYER AND MAIN TUNNELS AND CAUSES DIFFICULTY IN AVOIDING THE SETTLEMENT OF THE SURFACE AND MAIN TUNNELS. NUMERICAL SIMULATION ANALYSIS OF THE MECHANICAL CHARACTERISTICS AND INFLUENCING FACTORS ANALYSIS WERE CARRIED OUT USING FLAC3D. RESULTS SHOW THAT (1) THE CONSTRUCTION OF THE CROSS PASSAGE LARGELY DISTURBS THE MAIN TUNNELS. THE SETTLEMENT OF THE INTERSECTION PART OF THE MAIN TUNNELS AND CROSS PASSAGE IS MAINLY CONCENTRATED FROM −7 M TO 7 M. (2) DURING THE CONSTRUCTION OF THE CROSS PASSAGE, THE ORIGINAL MAIN TUNNELS ARE SUBJECTED TO STRESS REDISTRIBUTION, WHICH CAUSES STRESS CONCENTRATION IN THE INTERSECTING SEGMENTS, ESPECIALLY IN THE OPENING SIDE SEGMENT HAS AN UNFAVORABLE FORCE FORM IN WHICH THE UPPER AND LOWER SECTIONS ARE INTEGRALLY PULLED. (3) THE CONSTRUCTION OF THE CROSS PASSAGE CAUSES A LARGE TENSILE STRESS AREA IN THE STRUCTURE AS WELL. AS A RESULT, THE OVERALL TENSION OF THE UPPER AND LOWER SECTIONS OF THE STRUCTURE AND THE COMPRESSION OF THE HANCE ARE UNFAVORABLE. (4) THE INFLUENCE OF THE EXCAVATION OF THE CROSS PASSAGE ON THE SURFACE AND MAIN TUNNELS IS RELATED TO THE BURIED DEPTH, INTERSECTION ANGLE, EXCAVATION METHOD, AND GROUTING RANGE. THEREFORE, THE INFLUENCE OF DIFFERENT PARAMETERS CAN BE ANALYZED BY CHANGING THE MODEL PARAMETERS.

Downloads

Published

2019-05-20

Issue

Vol. 16 No. 6 (2019)

Section

Articles

License

Authors who publish with this journal agree to the following terms:

Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License [CC BY] that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).