[1]刘朝钦.软弱地层超大矩形顶管盾构隧道开挖面稳定性研究[J].高速铁路技术,2022,13(06):36-40.[doi:10.12098/j.issn.1674-8247.2022.06.007 ]
　LIU Chaoqin.Study on Stability of Excavation Face of Super-large Rectangular Pipe-jacking Shield Tunnel in Soft Ground[J].HIGH SPEED RAILWAY TECHNOLOGY,2022,13(06):36-40.[doi:10.12098/j.issn.1674-8247.2022.06.007 ]
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软弱地层超大矩形顶管盾构隧道开挖面稳定性研究()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
13卷
期数:
2022年06期
页码:
36-40
栏目:
理论探索
出版日期:
2022-12-20

文章信息/Info

Title:
Study on Stability of Excavation Face of Super-large Rectangular Pipe-jacking Shield Tunnel in Soft Ground
文章编号:
1674—8247 （2022） 06—0036—05
作者:
刘朝钦
海峡（福建）交通工程设计有限公司，福州350004
Author(s):
LIU Chaoqin
Haixia Traffic Engineering Design Co. ，Ltd ，Fuzhou? 350004 ，China
关键词:
隧道工程;  矩形顶管盾构;  软弱地层;  开挖面稳定
Keywords:
tunnel engineering;  rectangular pipe jacking shield;  soft ground;  stability of excavation face
分类号:
U455.43
DOI:
10.12098/j.issn.1674-8247.2022.06.007
文献标志码:
A
摘要:
为保证超大矩形顶管盾构隧道开挖面稳定，本文以某超大矩形顶管盾构隧道工程为背景，建立了软弱地层超大矩形顶管盾构隧道模型，研究了不同内摩擦角因子、黏聚力因子、埋深因子时开挖面位移和支护应力差率曲线，结果表明：（1）埋深因子越大，相同支护应力差率m下矩形顶管盾构隧道开挖面位移越大，开挖面主动破坏时m越小，被动破坏时m越大；（2）黏聚力因子越大，相同m下矩形顶管盾构开挖面位移越小，开挖面主动破坏时m越小，被动破坏时m越大；（3）内摩擦因子越大，相同m下矩形顶管盾构开挖面位移越小，开挖面主动破坏时差率m越小，被动破坏时m越大。研究结论可为类似工程提供参考。
Abstract:
In order to ensure the stability of the excavation face of the super-large rectangular pipe-jacking shield tunnel，a super-large rectangular pipe-jacking shield tunnel model in soft ground is established in this paper based on a case study of a super-large rectangular pipe-jacking shield tunnel project to study the displacement and support stress difference curves of the excavation face at different internal friction angle factors，cohesion factors，and buried depth factors. The results show that：（1）The greater the burial depth factor，the greater the displacement of the excavation face of the rectangular pipe-jacking shield tunnel under the same support stress difference rate m，and the smaller the m in case of active failure of the excavation face，the greater the m in case of passive failure.（2）The greater the cohesion factor，the smaller the displacement of the shield excavation face of rectangular pipe jacking at the same m，and the smaller the m in case of active failure of the excavation face，the greater the m in case of passive failure.（3）The larger the internal friction factor，the smaller the displacement of the excavation face of the rectangular pipe jacking shield at the same m，the smaller the difference rate of active failure m of the excavation face，and the larger the difference rate of passive failure m. The research results may be used for reference by similar projects.

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备注/Memo

备注/Memo:
收稿日期：2022-10-14
作者简介：刘朝钦（1990-），男，工程师。基金项目：国家自然科学基金项目（52178378）；中铁第四勘察设计院集团有限公司科技研究开发项目（2020K143）
更新日期/Last Update: 2022-12-20