[1]许兴伍.超高回填明洞荷载模式优化研究[J].高速铁路技术,2023,14(02):19-23.[doi:10.12098/j.issn.1674-8247.2023.02.004]
 XU Xingwu.A Study on Optimization of Load Pattern of Open-cut Tunnel with Ultra-high Backfill[J].HIGH SPEED RAILWAY TECHNOLOGY,2023,14(02):19-23.[doi:10.12098/j.issn.1674-8247.2023.02.004]
点击复制

超高回填明洞荷载模式优化研究()
分享到:

《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
14卷
期数:
2023年02期
页码:
19-23
栏目:
出版日期:
2023-04-30

文章信息/Info

Title:
A Study on Optimization of Load Pattern of Open-cut Tunnel with Ultra-high Backfill
文章编号:
1674-8247(2023)02-0019-05
作者:
许兴伍
中国铁路成都局集团有限公司,? 成都610082
Author(s):
XU Xingwu
China Railway Chengdu Group Co. , Ltd. , Chengdu? 610082 ,China
关键词:
超高回填明洞主动土压力静止土压力计算模式
Keywords:
ultra-high backfillopen-cut tunnelactive earth pressurestatic earth pressurecalculation mode
分类号:
U451.4
DOI:
10.12098/j.issn.1674-8247.2023.02.004
文献标志码:
A
摘要:
超高回填明洞拱顶回填土高度远大于普通明洞,采用传统荷载计算模式时理论与现实存在冲突。本文基于明洞结构施工过程及土压力形成基理,将传统明洞荷载计算模式中侧向压力由主动土压力优化为静止土压力。结果表明:(1)明挖法修建明洞工程,采用传统荷载计算模式时,存在某个极限回填高度;超过该极限回填高度,结构较难满足承载力及正常使用极限状态的要求;(2)明洞结构在回填土荷载作用下,变形量较小,不具备形成主动土压力的变形条件,明洞边墙侧向压力应为自重应力场的静止土压力;(3)案例表明,优化后的荷载计算模式与明洞受力状态更为接近,静止土压力荷载的计算模式合理可行。
Abstract:
The backfill height of the arch crown of the open-cut tunnel with ultra-high backfill is much higher than that of the ordinary open-cut tunnels,and there is a conflict between theory and reality when the traditional load calculation mode is adopted. Based on the construction process of open-cut tunnel structure and the formation of earth pressure,the lateral pressure in the traditional load calculation mode of the open-cut tunnel was replaced from active earth pressure to static earth pressure as an optimization in this paper. The results show that:(1)When the traditional load calculation mode is applied for the an open-cut tunnel,there is a certain limit backfilling height;exceeding the limit backfilling height,the structure is difficult to meet the requirements on bearing capacity and serviceability limit state.(2)Under the action of backfill soil load,the deformation of the open-cut tunnel structure is small and does not have the deformation conditions to form active earth pressure. The lateral pressure of the side wall of the open-cut tunnel shall be the static earth pressure of the dead-weight stress field.(3)The case shows that the optimized load calculation mode is closer to the stress state of the open-cut tunnel,and the calculation mode of static earth pressure load is reasonable and feasible.

参考文献/References:

[1]韩国强,周鹏,李盛,等. 考虑多因素耦合的高填明洞垂直土压力计算方法研究[J]. 现代隧道技术,2021,58(3):94 - 99. HAN Guoqiang,ZHOU Peng,LI Sheng,et al. Research on the Calculation Method of Vertical Soil Pressure on High-filled Open Cut Tunnels Based on Multi-factor Coupling[J]. Modern Tunnelling Technology,2021,58(3):94 - 99.
[2]黎康. 渝利铁路高填方深基础明洞结构力学特性研究[J]. 高速铁路技术,2020,11(3):79 - 84. LI Kang. Study on Mechanical Characteristics of Open Cut Tunnel Structure with High Fill and Deep Foundation in Chongqing-Lichuan Railway[J]. High Speed Railway Technology,2020,11(3):79 - 84.
[3]车宏亚. 上埋式管道垂直土压力的研究[M]. 北京:水利电力出版社. 1958. CHE Hongya. Research on Vertical Earth Pressure of Upper Buried Pipeline[M]. Beijing:Water Conservancy and Electric Power Press,1958.
[4]周鹏. 高填方明洞土压力设计荷载研究[D]. 兰州:兰州交通大学,2019. ZHOU Peng. Study on Design Load of Earth Pressure in High-filled Cut-and-cover Tunnel[D]. Lanzhou:Lanzhou Jiatong University, 2019.
[5]TB10003 - 2016铁路隧道设计规范[S]. TB10003 - 2016 Code for Design of Railway Tunnel[S].
[6]JTG 3370. 1 - 2018公路隧道设计规范第一册土建工程[S]. JTG 3370. 1 - 2018 Code for Design of Highway Tunnel Volume One Civil Engineering[S].
[7]罗禄森,张璞. 高填方明洞荷载初探[J]. 高速铁路技术,2014, 5(3):90 - 93. LUO Lusen,ZHANG Pu. Preliminary Study on Load of High Fill Open Cut Tunnel[J]. High Speed Railway Technology,2014,5(3):90 - 93.
[8]李盛. 高填黄土明洞卸载结构的垂直土压力特性和计算方法研究[D]. 兰州:兰州交通大学,2015. LI Sheng. Study on Vertical Earth Pressure Characteristic and Calculation Method of Unloading Structure for High Fill Loess Open Cut Tunnel[D]. Lanzhou:Lanzhou Jiatong University,2015.
[9]匡亮,陈赤坤,谭永杰,等. 沟谷山区城市超厚填土铁路明洞设计[J]. 铁道工程学报,2013,30(12):51 - 56. KUANG Liang,CHEN Chikun,TAN Yongjie,et al. Design of Extra-high Filling Urban Railway Open Cut Tunnel in Valley Mountain Area [J]. Journal of Railway Engineering Society,2013,30(12):51 -56.
[10]杨锡武,张永兴. 山区公路高填方涵洞的成拱效应及土压力计算理论研究[J]. 岩石力学与工程学报,2005,24(21):3887-3893. YANG Xiwu,ZHANG Yongxing. Study on Arch Action and Earth Pressure Theory for Culverts under High Embankment[J]. Chinese Journal of Rock Mechanics and Engineering,2005,24(21):3887-3893.
[11]杨锡武. 山区公路高填方涵洞土压力计算理论研究综述[J]. 重庆交通学院学报,2005,24(4):55-61,66. YANG Xiwu. Comprehension Introduction about the Earth Pressure Calculation Theories for High Embankment Culverts in Mountainous Place[J]. Journal of Chongqing Jiaotong University,2005,24(4):55-61,66.
[12]折学森,顾安全. 沟谷地形中埋设管道的土压力研究[J]. 长安大学学报(自然科学版),1989,9(4):33-39. ZHE Xuesen,GU Anquan. Study on the Earth Pressure on Conduit Lying Hidden in the Trench Terrain[J]. Journal of Chang’an University (Natural Science Edition),1989,9(4):33-39.
[13]顾安全. 上埋式管道及洞室垂直土压力的研究[J]. 岩土工程学报,1981,3(1):3-15. GU Anquan. Investigation of the Vertical Earth Pressure on Projecting Conduit and Underground Chamber under a High Embankment[J]. Chinese Journal of Geotechnical Engineering,1981,3(1):3-15.
[14]旷文涛. 超高回填明洞设计探讨[J]. 铁道标准设计,2014, 58(7):112-115. KUANG Wentao. Design Research on Open Cut Tunnel Having Ultra-high Backfill[J]. Railway Standard Design,2014,58(7):112-115.

备注/Memo

备注/Memo:
收稿日期:2022-04-23
作者简介:许兴伍(1971-),男,高级工程师。
更新日期/Last Update: 2023-04-30