大直径浅埋隧道下穿运营高铁防护措施研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1499 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

Abstract Research purposes: In order to ensure the safety of operation of high-speed railway during large-diameter shallow-buried tunnel shield construction, reliable reinforcement measures must be taken for the undercrossing section of high-speed railway due to the high displacement requirements of the technical regulations caused by the impact of underpass engineering. In this paper, based on the first large-diameter shield project of high-speed railway in China,Suzhou city main road undercrossing Shanghai-Nanjing intercity railway engineering, for soft soil area and the high deformation characteristics of high-speed rail piers, the influence of the loss rate of formation, the isolation pile diameter and pile length, and the pouring material in steel casing on high-speed railway bridge pier is studied, and a safe and reliable reinforcement scheme is put forward.
Research conclusions: (1)When the tunnel shield passes through the saturated silt and fine sand soil layer,it is suggested that the soil in the isolation pile should be strengthened to improve the stability of soil.(2)As the diameter of the isolation pile increases, its stiffness also increases, and its influence on the high-speed railway bridge pier decreases.(3)According to the horizontal deformation of the isolation pile of different pile lengths and its influence on the high-speed railway bridge pier, and combined with the type and depth of embedded soil layer, the reasonable length of the isolation pile is determined.(4)The combined stiffness of the isolation pile filled with different materials in the steel casing is mainly determined by the diameter and wall thickness of the steel casing, and the influence of soil grouting inthe steel casing on the high-speed railway is less than that of concrete.(5)The reinforcement schemes and safety assessment ideas for underpass operation of high-speed railway in soft soil areas are put forward to ensure the operation safety of high-speed railway during and after the implementation of the project, which can provide reference for similar projects in the future.

Key words： high-speed railway bridge shallow large diameter tunnel shield construction strata loss foundation deformation

Received: 10 May 2022

PACS:	U455.91
	U238

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHAO Daliang
	CHEN Qifa
	WANG Bing

Cite this article:

ZHAO Daliang,CHEN Qifa,WANG Bing. Research on Protection Measures of Large Diameter Shallow Tunnel Passing through Operating High-speed Railway[J]. Journal of Railway Engineering Society, 2023, 40(11): 64-69.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2023/V40/I11/64

[1]	TB 10182—2017,公路与市政工程下穿高速铁路技术规程[S].TB 10182—2017,Technical Specification for Highway and Municipal Engineering under Crossing High Speed Railway[S].
[2]	冯国辉,周逊泉,何庆亮,等.隔离桩对盾构掘进引起邻近高铁桩基水平位移的影响分析[J].土木与环境工程学报(中英文),2020(4):28-35.Feng Guohui,Zhou Xunquan,He Qingliang,etc. Analysis on the Influence of Isolation Pile on Horizontal Displacement of Adjacent Pile under High-speed Railway Caused by Shield Driving[J].Journal of Civil and Environmental Engineering,2020(4):28-35.
[3]	杨广武,关龙,刘军,等.盾构法隧道下穿既有结构三维数值模拟分析[J].中国铁道科学,2009(6):54-59.Yang Guangwu,Guan Long,Liu Jun,etc.Three-Dimensional Numerical Simulation Analysis of the Shield Driven Tunnel Crossing under the Existing Structure[J].China Railway Science,2009(6):54-59.
[4]	冯印.新开河道并行沪宁城际高铁安全影响分析[J].铁道工程学报,2014(8):37-43.Feng Yin.Analysis of Safety Impact on Newly-built Channel Paralleled with Shanghai-Nanjing Intercity High-speed Railway[J].Journal of Railway Engineering Society,2014(8):37-43.
[5]	宋玉芹,林永亮.大直径盾构隧道近距离穿越桩基的方案比选[J].中外公路,2020(6):231-236.Song Yuqin,Lin Yongliang.Comparison and Selection of Large Diameter Shield Tunnel Penetrating Pile Foundation in Short Distance[J].Journal of China & Foreign Highway,2020(6):231-236.
[6]	陈涛,吕勇刚.盾构法隧道近距离侧穿对桥梁桩基的影响[J].中国港湾建设,2016(8):20-24.Chen Tao,Lv Yonggang.Influence of Construction of Side-crossing Shield Tunnel on Adjacent Bridge Pile Foundation[J].China Harbour Engineering, 2016(8):20-24.
[7]	王建秀,邹宝平,付慧仙,等.盾构地层损失与对应地面沉降计算的对比分析[J].铁道工程学报,2013(9):72-77.Wang Jianxiu, Zou Baoping, Fu Huixian,etc.Comparative Study of Strata Loss and Its CorrespondingGround Settlement Induced by Shield Construction[J].Journal of Railway Engineering Society,2013(9):72-77.
[8]	张庆闯,戴志仁,时亚昕,等.新建隧道近接穿越既有运营地铁隧道关键技术[J]. 铁道工程学报,2020(6):58-63.Zhang Qingchuang, Dai Zhiren, Shi Yaxin,etc. Key Technologies for Newly-built Tunnel Tunnelling through Operated Tunnel[J]. Journal of Railway Engineering Society,2020(6):58-63.