复合地层双线矩形隧道近接下穿高铁三维影响分区及应用研究

doi:10.13722/j.cnki.jrme.2023.0759

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Abstract This study aims to propose a safe and reasonable reinforcement plan for the underpass construction of a high-speed rail by an adjacent dual-track rectangular tunnel，theoretical analysis，numerical simulation，and on-site monitoring methods were employed. Leveraging the underpassing of the Hangzhou—Shenzhen high-speed rail project by a specific dual-track rectangular tunnel，this study conducted research on the three-dimensional impact zoning and its application. The results demonstrate that：(1) Based on derived discriminative expressions for lateral and longitudinal impacts，a three-dimensional impact zoning model for the underpass construction of the dual-track rectangular tunnel adjacent to the high-speed rail can be established. (2) In areas of significant impact，employing reinforced measures such as manual bored piles and D-shaped steel beam bracings effectively controls roadbed and track settlements，ensuring the safe underpass of the dual-track rectangular tunnel beneath the existing high-speed rail. (3) After adopting the optimal reinforcement plan，on-site monitoring data closely aligned with simulated results，with errors in all monitoring indicators meeting specified control standards，thereby validating the rationality of the impact zoning model and the safety of the reinforcement measures. The research findings provide a reference for similar dual-track tunnel underpass construction projects.

Key words： tunnelling engineering double-line rectangular tunnel close construction 3D impact zoning reinforcement measure

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	Articles by authors
	CUI Guangyao1
	DAI Aimeng1
	KE Xu1
	NING Maoquan2
	3
	TIAN Yuhang1

Cite this article:

CUI Guangyao1,DAI Aimeng1,KE Xu1, et al. Study on 3D impact zoning and application of double-line rectangular tunnel in composite formation close construction underpassing the high-speed railway[J]. , 2024, 43(S2): 3609-3620.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0759 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS2/3609

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