STUDY ON THE STABILITY OF HIGH SLOPE OF THE MINJIANG RIVER DOUBLE-TRACK BRIDGE

CHEN Hang; QIU Min; PENG Ya-ting; LONG Xue-mei; ZOU Zu-yin

Volume 21 Issue 1

Mar. 2015

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Article Navigation > Journal of Geomechanics > 2015 > (1): 108-116

LI Fang-quan, 2011. REMOTE SENSING STRUCTURE ANALYSIS ON THE STRUCTURAL PROCESSES OF WENCHUAN AND YUSHU EARTHQUAKES: ANALYSIS OF AREA DANGEROUS OF EARTHQUAKE. Journal of Geomechanics, 17 (1): 41-54, 78.

Citation:

CHEN Hang, QIU Min, PENG Ya-ting, et al., 2015. STUDY ON THE STABILITY OF HIGH SLOPE OF THE MINJIANG RIVER DOUBLE-TRACK BRIDGE. Journal of Geomechanics, (1): 108-116.

Citation:

CHEN Hang, QIU Min, PENG Ya-ting, et al., 2015. STUDY ON THE STABILITY OF HIGH SLOPE OF THE MINJIANG RIVER DOUBLE-TRACK BRIDGE. Journal of Geomechanics, (1): 108-116.

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STUDY ON THE STABILITY OF HIGH SLOPE OF THE MINJIANG RIVER DOUBLE-TRACK BRIDGE

1.
College of Civil Engineering, Sichuan Agricultural University, Dujiangyan 611830, China
2.
College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

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Abstract

Abstract

The high slope of Double-track Bridge on Minjiang River of Chenglan Railway is located in Minjiang River seismic belt, which is a high and frequent seismic region, with substantial concentrated rainfall and widespread unfavorable geology. Under the impact of the complicated environmental factor, it may give rise to the slope slide easily. In this paper, 3D slope mode is established with FLAC3D finite difference software based on the study on the geology of field engineering, and stability analysis in such working conditions as the natural rainfall, earthquake and coupling of rainfall and earthquake. According to the results, the safety coefficient in natural working condition is 1.318, and the slope is in stable status. In rainfall working condition, with the increase of rainfall, the rainwater infiltration and loading function is enhanced, and the displacement high-value area expands gradually and extends to the slope toe. In 25 mm/d, 35 mm/d and 45 mm/d rainfall condition, the safety coefficient is 1.001, 0.932 and 0.912 respectively. The slope is quite unstable in earthquake working condition, and the upside displacement and accelerated speed of the mid-slope is the greatest, and it is easy-sliding area. In the coupling working condition of rainfall and earthquake, the upside of mid-slope is extremely unstable, and with the increase of rainfall, the displacement and accelerated speed would increase.
- slopes,
- earthquake,
- rainfall,
- coupling,
- stability,
- numerical simulation

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References

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STUDY ON THE STABILITY OF HIGH SLOPE OF THE MINJIANG RIVER DOUBLE-TRACK BRIDGE

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