下穿飞机跑道地铁区间隧道附加荷载计算方法

doi:10.3973/j.issn.2096-4498.2020.09.007

中国科学引文数据库（CSCD）来源期刊
中文核心期刊中文科技核心期刊
Scopus RCCSE中国核心学术期刊
美国EBSCO数据库俄罗斯《文摘杂志》
《日本科学技术振兴机构数据库（中国）》

隧道建设（中英文） ›› 2020, Vol. 40 ›› Issue (9): 1292-1299.DOI: 10.3973/j.issn.2096-4498.2020.09.007

下穿飞机跑道地铁区间隧道附加荷载计算方法

童建军^{1， 2}，桂登斌^{1， 2}，王力^{1， 2}，王明年^{1， 2}，王志龙^{1， 2， *}

（1. 西南交通大学土木工程学院，四川成都 610031； 2. 西南交通大学交通隧道工程教育部重点实验室，四川成都 610031）

出版日期:2020-09-20 发布日期:2020-10-10
作者简介:童建军(1977—)，男，四川仁寿人，2014年毕业于西南交通大学，桥梁与隧道工程专业，博士，副教授，从事隧道及地下工程方面的教学与科研工作。E-mail: 414417808@qq.com。*通信作者：王志龙， E-mail: 805294490@qq.com。

Calculation Method of Additional Load of Metro Tunnel Crossing underneath Existing Airstrip

TONG Jianjun^{1, 2}, GUI Dengbin^{1, 2}, WANG Li^{1, 2}, WANG Mingnian^{1, 2}, WANG Zhilong^{1, 2, *}

(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Online:2020-09-20 Published:2020-10-10

摘要/Abstract

摘要： 为更加准确方便地计算飞机滑行过程中对下穿飞机跑道的地铁区间隧道最不利作用位置的附加荷载值，将飞机22个轮子的最不利滑动荷载峰值作为飞机静荷载作用集中力，运用布辛奈斯克理论公式求解22个轮载作用下的地层附加应力值，分析不同埋深条件下最大竖向附加应力的分布规律和量值变化规律。根据荷载-结构法与飞机附加应力的理论解，确定下穿飞机跑道地铁区间隧道附加荷载的最不利分布模式，并通过回归分析得到飞机附加应力q1、q5的简化计算公式。最后通过数值模拟的方法验证了布辛奈斯克理论公式的适用性。研究结果表明： 1）随着隧道埋深的增大，飞机最大竖向附加应力与隧道竖向围岩压力的比值先迅速下降，随后缓慢下降，当隧道埋深大于50 m时，飞机最大竖向附加应力与竖向围岩压力的比值较小； 2）不同隧道埋深下的飞机最大竖向附加应力值点位置基本一致，位于距离飞机最后一排轮子2.1~3.3 m的中轴线上； 3）飞机附加荷载最不利分布模式为近似对称梯形分布模式，此时飞机最大竖向附加应力值点位于隧道拱顶正上方； 4）简化后的附加应力q1与隧道埋深z呈负相关关系，q5与隧道埋深z、隧道洞径D呈负相关关系。

关键词: 地铁区间隧道, 飞机滑行荷载, 附加荷载, 分布模式

Abstract: In order to more accurately and conveniently calculate the additional load value of the most unfavorable action position of the tunnel undercrossing the airstrip during taxiing, the peak value of the most unfavorable sliding load of the 22 wheels of the aircraft is taken as the concentrated force of the static load of the aircraft. The additional stress value of the stratum under wheel load is analyzed, and the distribution and magnitude of the maximum additional stress under different depths are analyzed. According to the loadstructure method and the theoretical solution of the additional stress of the aircraft, the most unfavorable distribution mode of the additional load in the tunnel under the airstrip and metro is determined, and the simplified calculation formula of the additional load of the aircraft q1 and q2 are obtained through regression analysis. Finally, the applicability of the J. Boussinesq theoretical formula is verified by numerical simulation. The research results show that: (1) As the burial depth of the tunnel increase, the proportion of the maximum vertical additional stress of the aircraft to the surrounding rock pressure of the tunnel decreases rapidly first and then slowly; when the burial depth is greater than 50 m, the proportion of the maximum vertical additional stress of the aircraft is relatively small. (2) The positions of the maximum vertical additional stress value of the aircraft under different burial depths are basically the same, which are located on the central axis 2.1~3.3 m from the last row of wheels of the aircraft. (3) The most unfavorable distribution mode of the aircraft additional load is approximately symmetrical trapezoid distribution mode, and the point of the maximum vertical additional stress value of the aircraft is directly above the tunnel crown. (4) The simplified additional stress q1 is negatively related to the burial depth z of the tunnel, and q5 is negatively related to the burial depth z of the tunnel and the tunnel diameter D.

Key words: metro tunnel, aircraft sliding load, additional load, distribution pattern

中图分类号:

U 45

童建军, 桂登斌, 王力, 王明年, 王志龙. 下穿飞机跑道地铁区间隧道附加荷载计算方法[J]. 隧道建设, 2020, 40(9): 1292-1299.

TONG Jianjun, GUI Dengbin, WANG Li, WANG Mingnian, WANG Zhilong. Calculation Method of Additional Load of Metro Tunnel Crossing underneath Existing Airstrip[J]. Tunnel Construction, 2020, 40(9): 1292-1299.

[1]	田峰，王海桥，朱祝龙，陈世强，黄俊歆. 长大地铁区间隧道火灾可用安全疏散时间算法研究及应用[J]. 隧道建设, 2019, 39(1): 54-59.
[2]	甘鹏山，赵国虎，袁勇，付佰勇. 沉管隧道横向地基刚度分布模式初探[J]. 隧道建设, 2018, 38(4): 611-618.
[3]	吴镇，耿传政，王磊. 富水卵石层土压平衡盾构水下接收技术[J]. 隧道建设, 2018, 38(12): 2040-2045.
[4]	李清菲. 新建地铁线路下穿既有车站的仿真模拟分析[J]. 隧道建设, 2015, 35(12): 1275-1280.
[5]	国斌. 北京地铁区间隧道马头门工程综合施工技术[J]. 隧道建设, 2012, 32(2): 201-204.
[6]	何泽刚, 谭文杰. 广州地铁二号线海公区间南段湿喷混凝土施工技术[J]. 隧道建设, 2003, 23(6): 23-26.

下穿飞机跑道地铁区间隧道附加荷载计算方法

Calculation Method of Additional Load of Metro Tunnel Crossing underneath Existing Airstrip

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 6

编辑推荐

Metrics

本文评价