[1]车东坡.超大断面异型隧道台阶法施工工法优选研究[J].高速铁路技术,2024,15(02):113-118.[doi:10.12098/j.issn.1674-8247.2024.02.021]
　CHE Dongpo.Optimal Selection Study of Construction Methodology for Super-large Cross-section Irregular-shaped Tunnel Using Bench Method[J].HIGH SPEED RAILWAY TECHNOLOGY,2024,15(02):113-118.[doi:10.12098/j.issn.1674-8247.2024.02.021]
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超大断面异型隧道台阶法施工工法优选研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
15卷
期数:
2024年02期
页码:
113-118
栏目:
施工技术
出版日期:
2024-04-30

文章信息/Info

Title:
Optimal Selection Study of Construction Methodology for Super-large Cross-section Irregular-shaped Tunnel Using Bench Method
文章编号:
1674-8247(2024)02-0113-06
作者:
车东坡
中铁十四局集团第五工程有限公司， 山东?济宁 272117
Author(s):
CHE Dongpo
The Fifth Engineering Co. ，Ltd. of China Railway Fourteenth Bureau Group Co. ，Ltd. ，Jining 272117 ，China
关键词:
超大断面; 异型隧道; 工法优选; 台阶法; 数值模拟
Keywords:
super-large cross-section; irregular-shaped tunnel; methodology optimization; bench method; numerical simulation
分类号:
U455
DOI:
10.12098/j.issn.1674-8247.2024.02.021
文献标志码:
A
摘要:
为保证超大断面异型隧道的施工安全，依托某超大断面异型隧道建设工程，利用FLAC3D软件对超大断面异型隧道采用四台阶九步法、三台阶七步法、三台阶五步法的位移、应力、安全系数进行了研究。研究结果表明：(1)四台阶九步法所引起的拱顶沉降与收敛值均最小，分别为3.563mm、0.765mm、1.715mm、2.785mm、2.060mm，位移控制效果最佳且满足工程规定值；三台阶七步法次之，而三台阶五步法各项收敛值均最大；(2)四台阶九步法最大主应力和最小主应力均小于其他两种工况应力值，且应力分布较为均匀；(3)四台阶九步法最小安全系数最大，为3.98，满足规范要求；推荐该工程使用四台阶九步法进行施工。研究成果可为类似异型隧道施工工法选取提供参考。
Abstract:
To ensure the construction safety of super-large cross-section irregular-shaped tunnels，this study，anchored in a specific engineering project involving such a tunnel，employed the FLAC3D software to investigate the displacements，stresses，and safety factors associated with the application of Four-bench Nine-step Method，Three-bench Seven-step Method，and Three-bench Five-step Method. The findings demonstrate that：(1)Among the methods，the Four-bench Nine-step Method yields the smallest crown settlement and convergence values，respectively，being 3. 563 mm， 0. 765 mm，1. 715 mm，2. 785 mm，and 2. 060 mm，providing the best displacement control and complying with the project’s specified limits. The Three-bench Seven-step Method follows suit，while the Three-bench Five-step Method exhibits the largest convergence values for each parameter. (2)The maximum and minimum principal stresses for the Four-bench Nine-step Method are less than those for the other two construction scenarios，with a more uniform stress distribution. (3)The Four-bench Nine-step Method also provides the highest minimum safety factor，reaching 3. 98， satisfying the regulatory requirements. Therefore，this study recommends the use of the Four-bench Nine-step Method for this particular project. The conclusions can serve as a reference for the selection of construction methodologies in similar irregular-shaped tunnel projects.

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备注/Memo

备注/Memo:
收稿日期：2024-01-08
作者简介：车东坡(1987-)，男，工程师。
更新日期/Last Update: 2024-04-30