Abstract
To study the deformation behavior of the high rockfill (HRF) embankment during construction and operation, based on more than a 50-m high rockfill embankment of the second-class road reconstruction project from Xunyang to Ankang of the national road 316 in Shaanxi, China, the centrifuge model test was performed to study the deformation laws of HRF embankment. The test results showed the following: (i) the HRF embankment was stable during construction and operation; (ii) during construction, the settlement occurred at the embankment top, and uplift occurred at the slope foot. Moreover, the deformation at the top was greater than that at the slope foot, and the deformations at both the top and the slope toe reached the maximum value at the end of construction; (iii) during operation, the settlement at the embankment top continued, and it changed rapidly at the start of operation. And then, the rate of the settlement slowed down and reached a steady state finally. The deformation of the slope foot was very small. This study can provide basis and reference for the design and construction of a similar project in mountain areas.
Highlights
When building a road in mountainous areas, due to lack of adequate soil fillers, rock ballast generated by excavation of road cutting and tunnels becomes the main roadbed fillings [1]
In order to analyze the stability of the High rockfill (HRF) embankment during the construction and the longterm operation, and broaden the knowledge range of the HRF embankment, this study based on the section from K21 + 350 to K21 + 541.751 of the HRF embankment of the second-class road reconstruction project from Xunyang to Ankang of the national road 316 in Shaanxi, China, the centrifugal model test was carried out to explore the deformation behavior of the HRF embankment during the construction and operation
To analyze the stability of the HRF embankment during the construction and the long-term operation, and broaden the knowledge range of the HRF embankment, the centrifuge model test was carried out based on the actual project to explore the deformation behavior of the HRF embankment during the construction and operation
Summary
When building a road in mountainous areas, due to lack of adequate soil fillers, rock ballast generated by excavation of road cutting and tunnels becomes the main roadbed fillings [1]. Settlement of High Rockfill Embankment through centrifuge tests with an airport in Southwest China as the engineering background [2]. The settlement deformation characteristics of the high fill embankment were developed under different designed dry densities and water contents through centrifuge tests [6,7]. In order to analyze the stability of the HRF embankment during the construction and the longterm operation, and broaden the knowledge range of the HRF embankment, this study based on the section from K21 + 350 to K21 + 541.751 of the HRF embankment of the second-class road reconstruction project from Xunyang to Ankang of the national road 316 in Shaanxi, China, the centrifugal model test was carried out to explore the deformation behavior of the HRF embankment during the construction and operation. Sadeghi and Esmaeili et al [28,29,30] gave a detailed introduction to the specifications of more test measuring instruments
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