黄土地区重载铁路路堤动力响应及长期沉降

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Abstract Research purposes:Field test is a significance way describing the dynamic response of subgrade under moving train loading. In order to obtain the dynamic stress distribution in the embankment at loess region, the field test was carried out with a heavy haul train passing through, and the characteristics of the dynamic stress curve and its evolution rule were discussed. Additionally, the long-term settlement of embankment was predicted.
Research conclusions:(1) The waveform of dynamic stress could be classified into three types, i.e. bimodal type, sine type and deflected sine type. Moreover, the two loading patterns of dynamic triaxial test were also proposed, i.e. "short intermission + sudden transition" pattern and "continuous loading + gentle transition" pattern. (2) The ratio of peak dynamic stress versus axial weight under various working conditions is within a specific envelope range. Boundaries of the envelope range could be defined by exponential function. (3) During the 50 years of operation, the dynamic settlement of embankment could not exceed 45 mm in the present study. (4) The research results can provide reference for the service status study of railway embankment under moving train loading.

Key words： field test train loading dynamic stress long-term settlement waveform feature

Received: 15 December 2020

PACS:

TU211.4

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	Articles by authors
	WANG Rui
	HU Zhiping
	WANG Lei
	BAI Lan
	ZHAO Zhenrong

Cite this article:

WANG Rui,HU Zhiping,WANG Lei, et al. Dynamic Response and Long-term Settlement of Heavy-haul Railway Embankment in Loess Area[J]. Journal of Railway Engineering Society, 2022, 39(1): 7-12.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2022/V39/I1/7

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