飞机荷载对下穿TBM隧道管片结构与地层附加应力影响研究
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摘要
随着地铁隧道下穿机场跑道案例的增多,研究飞机荷载对TBM隧道掘进影响具有重大的意义。依托重庆轨道交通10号线T3航站楼-T2航站楼区间,运用FLAC3D软件研究分析飞机在不同位置下对TBM隧道管片位移与内力的影响,飞机荷载作用下围岩附加应力的变化情况。结果表明:飞机荷载虽然对管片内力与结构都有一定的影响,但其影响较小,管片安全;附加应力在同一深度下中间位置最大向周围逐渐减小,附加应力纵向上呈中间大两边小的趋势。
With the increase of the subway tunnel passing through the airport runway, it is significant to study the influence of aircraft load on TBM tunneling. This paper is based on the T3 terminal to T2 terminal section of Chongqing rail transit line ten, using FLAC3D software, analyzed the influence of the displacement and internal force of segment TBM tunnel in different plane position, the change of the additional stress in the surrounding rock under the load of the airplane. The results show that although the aircraft loads have certain influence on the internal force and structure, but its influence is small, the segment is safety; At the same depth, the additional stress is the largest in the center position, decrease gradually around.in the longitudinal direction. The additional stress is large in the middle and small on both sides.
With the increase of the subway tunnel passing through the airport runway, it is significant to study the influence of aircraft load on TBM tunneling. This paper is based on the T3 terminal to T2 terminal section of Chongqing rail transit line ten, using FLAC3D software, analyzed the influence of the displacement and internal force of segment TBM tunnel in different plane position, the change of the additional stress in the surrounding rock under the load of the airplane. The results show that although the aircraft loads have certain influence on the internal force and structure, but its influence is small, the segment is safety; At the same depth, the additional stress is the largest in the center position, decrease gradually around.in the longitudinal direction. The additional stress is large in the middle and small on both sides.
引文
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[2] Wittke W.WT TECHNICAL REVIEW-Tunnelling under Stuttgart Airport runway-Stability analyses and monitoring have been instrumental in avoiding subsidence problems in the construction of a new subway tunnel[J].World Tunnelling,2003,16( 8):317-321.
[3] Darby,Arthur W.The Airside Road Tunnel,Heathrow Airport[C]//Proceedings of the 2003 Rapid Excavation and Tunneling Conference.England:Society for Mining,Metallurgy and Exploration Inc:236-242.
[4] 孙璕,廖少明,米思兴,等.下穿上海虹桥机场飞行区的三项隧道工程简介[J].地下工程与隧道,2010(3):10-14.
[5] 吴国安,黄盛裕,林耀辉.台北捷运系统内湖线CB420标潜盾工程穿越松山机场施工全纪录与检讨[C]//第五届海峡两岸隧道与地下工程学术讨论会论文集.2006:789-793.
[6] 吴光坤,李玮.广东珠海机场停机坪地道工程施工[J].水利水电施工,2005(2):48-49.
[7] 杨斐,杨宇亮,孙立军.飞机起降荷载作用下的场道地基沉降[J].同济大学学报(自然科学版),2008,36(6):744-749.
[8] 肖明,来颖.盾构隧道下穿机场跑道沉陷控制三维数值模拟[J].隧道建设,2011,31(S):32-37.
[9] 赵爽.运营机场与下穿隧道动静力响应分析[D].重庆:重庆交通大学,2014.
[10] 晁凯.下穿机场跑道大断面隧道施工力学特性及沉降控制[D].北京:北京交通大学,2013.
[11] 高宇澄,高谦.某高速公路路堑边坡FLAC数值模拟分析[J].系统仿真技术,2006,2(3):171-175.
[12] 刘波,韩延辉.FLAC原理、实例与应用指南[M].北京:人民交通出版社,2005.
[13] 周思震.飞机荷载作用下暗挖隧道结构及机场跑道动力响应分析 [D].北京:北京交通大学,2012∶28-34.
[14] 高峰,付钢,胡文亮.移动飞机荷载对机场下部隧道的影响[J].重庆交通大学学报(自然科学版),2012,31(2):219-220.
[15] 丁秀美,黄润秋,臧亚君.预应力锚索作用下附加应力的FLAC3D模拟[J].成都理工大学学报(自然科学版),2003,30(4):339-345.
[16] 谭瑞山,李剑,王星运,等.斜坡地基附加应力扩散规律的研究[J].科学技术与工程,2012,12(35):9733-9739.
[17] 王谋晓,蔚学勇,魏进,等.硬壳层软土地基竖向附加应力扩散的数值分析[J].长安大学学报(自然科学版),2007,27(3):37-41.