3D打印技术在高铁隧道仰拱隆起病害模拟试验中的应用与研究

doi:10.13722/j.cnki.jrme.2019.0947

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Abstract Invert heaving diseases occur frequently in high-speed railway (HSR) tunnels，seriously affecting the normal operation of railway lines. A new method for simulating deformation-induced diseases in HSR tunnels was proposed. A refined HSR tunnel model with tunnel structure and accessory facilities was constructed by using 3D printing technology，and the working state of accessory facilities was considered in an all-round way. Those things related to the HSR tunnel model building were described in detail，including the classification of model components，3D printing materials and their selection method，printing process，etc. Based on typical disease cases，disease simulation experiment was carried out to reproduce the disease characteristics of the site，and the characteristics of drainage，external water pressure and structural displacement were also discussed. The results show that，with increasing the groundwater level，the tunnel drainage increases logarithmically.While the groundwater level is more than 20 m，the increment of the drainage decreases obviously，the external water pressure of the structure increases significantly(especially at the bottom and the vault)，and the uplift of bottom structure increases continuously with a feature of tunnel bottom＞inner rail＞outer rail. When the groundwater level is 50 m，the test results are in good agreement with the field disease characteristics，which verifies the feasibility and validity of the method. The research results are expected to provide reference for fine simulation of tunnel diseases and similar tunnel model tests.

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	LI Linyi1
	YANG Junsheng1
	WANG Lichuan1
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	GAO Chao1
	JIANG Maiyong3
	WANG Zijiang1

Cite this article:

LI Linyi1,YANG Junsheng1,WANG Lichuan1, et al. tunnelling engineering；3D printing technology；high-speed railway tunnel；invert heaving；disease simulation；model test#br#[J]. , 2020, 39(7): 1369-1384.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2019.0947 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/I7/1369

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