[1]牛泽林,刘朝鹏,郑 蕾,等.大断面公路板岩隧道开挖与支护数值模拟研究[J].西安建筑科技大学学报(自然科学版),2020,52(03):376-383，403.[doi:10.15986/j.1006-7930.2020.03.010]
　NIU ZeLin,LIU Chaopeng,ZHENG Lei,et al.Numerical simulation study on excavation and support of slab tunnel in large section highway[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2020,52(03):376-383，403.[doi:10.15986/j.1006-7930.2020.03.010]
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大断面公路板岩隧道开挖与支护数值模拟研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
52
期数:
2020年03期
页码:
376-383，403
栏目:
出版日期:
2020-06-30

文章信息/Info

Title:
Numerical simulation study on excavation and support of slab tunnel in large section highway
文章编号:
1006-7930(2020)03-0376-08
作者:
牛泽林1; 2; 刘朝鹏3; 郑 蕾3; 吴辉辉3; 胡文乐1; 2; 臧鹏飞1; 2; 刘 华1; 2
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055; 3.中铁北京工程局集团第一工程有限公司,陕西 西安 710100)
Author(s):
NIU ZeLin1; 2;  LIU Chaopeng3;  ZHENG Lei3;  WU Huihui3;  HU Wenle1; 2;  ZANG Pengfei1; 2;  LIU Hua1; 2
(1.School of Civil Engineering, Xi’an Univ.of Arch.& Tech., Xi’an 710055, China; 2.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xi’an 710055, China; 3.China Railway Beijing Engineering Bureau Group First Engineering Co., Ltd., Xi’an 710100, China)
关键词:
隧道工程;  板岩;  大断面;  数值模拟
Keywords:
tunnel engineering;  slate;  large section;  numerical simulation
分类号:
TU455.4
DOI:
10.15986/j.1006-7930.2020.03.010
文献标志码:
A
摘要:
为了研究上下台阶法和CD法等不同施工工法及不同开挖步距下对大断面板岩隧道开挖围岩受力及变形的影响规律,基于有限元基本原理对各 隧道的施工工况进行模拟分析,得到了隧道开挖过程中软弱围岩的应力场和位移场,并对隧道围岩稳定性进行了探讨.研究结果表明:采用两台阶法模拟隧道开挖过程中整个施工过程中应力最大值为3.550 MPa,洞室周边的应力影响范围为5～20 m,在隧洞跨径的1.5倍以内; 采用CD法模拟隧道施工时洞周发生的位移较小,拱顶下沉和水平收敛的位移量与两台阶法施工的位移量相比分别减少了27.8%和34.0%; 模拟不同开挖步距下隧道拱顶沉降和水平收敛的位移变形大致表现出二次多项式的函数关系,为隧道施工期的安全稳定及控制技术提供数据支撑及理论依据.
Abstract:
In order to study the influence of different construction methods such as full upper and lower step method and CD method on the stress and deformation of surrounding rock in large fault face rock tunnel excavation under different excavation steps, the construction of each tunnel is analyzed on the basic principle of finite element The simulation analysis shows the stress field and displacement field of the weak surrounding rock during the tunnel excavation process, and discusses the stability of the tunnel surrounding rock was discussed.Results show that the maximum stress during the tunnel excavation process is 3.550 MPa, and the stress around the cavern is 5-20 m, which is within 1.5 times of the span of the tunnel.The CD method is used for simulation,and the displacement of the tunnel is small when the tunnel is constructed.The displacement of the dome sinking and horizontal convergence is reduced by 27.8% and 34.0%, compared with the displacement of the two-step construction.The tunnel vault is simulated under different excavation steps.The displacement deformation of settlement and horizontal convergence generally shows the function relationship of quadratic polynomial, which provides data support and theoretical basis for the safety and stability and control technology of tunnel construction period.

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备注/Memo

备注/Memo:
收稿日期:2019-12-06 修改稿日期:2020-05-13
基金项目:国家自然科学基金项目(51608436); 陕西省自然科学基础研究计划(2018JQ5003); 陕西省教育厅专项科研项目(18JK0478)
第一作者:牛泽林(1978-),男,博士,讲师,主要从事岩土隧道与地下结构工程可靠性分析、设计和安全预警等教学服务工作.E-mail:niuzldq@xauat.edu.cn
更新日期/Last Update: 2020-07-30