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A platform for research: civil engineering, architecture and urbanism
Model Test Investigation of Soil Arching Development Above Reinforced Concrete Culvert Underneath Embankment
https://orcid.org/http://orcid.org/0000-0003-1661-5811
A trapdoor system has frequently been used to study soil arching and its development. The load transfer in the fill of embankments is very similar to a trapdoor system. In order to study the displacement mode of the embankment and the influence of soil arching effect on the earth pressure on culvert crown, a series of model tests on controlled settlement were carried out using three different diameter aluminum rods with analogical embankment backfill. In the process of controlling the settlement of aluminum rods, photographs of aluminum rods with different relative displacements were taken by a digital camera, and the MATLAB software was used to run a program to extract the whole-field displacement values of aluminum rods from the image acquisition of the photographs by particle image velocimetry technique. The evolution law of soil arching on culvert crown was investigated under different differential settlement (Δs) and different filling heights (H). The results show that with the change in Δs, the soil arching has experienced three stages, which are formation, evolution, and stability. The height of soil arching in a critical state is about 1.5 times of the culvert width (D), and the inclination angle of the shear plane (θ) is 15° after the stabilization of the embankment settlement. The calculation of earth pressure on the culvert crown considering the soil arching effect is proposed as (1) earth pressure on culvert crown considering incomplete soil arching; (2) earth pressure on culvert crown considering complete soil arching. Finally, by comparing the calculated results with the measured values, the difference is about 10%, which illustrates the applicability of the proposed calculation method of earth pressure on culvert crown considering the soil arching effect.
Model Test Investigation of Soil Arching Development Above Reinforced Concrete Culvert Underneath Embankment
https://orcid.org/http://orcid.org/0000-0003-1661-5811
A trapdoor system has frequently been used to study soil arching and its development. The load transfer in the fill of embankments is very similar to a trapdoor system. In order to study the displacement mode of the embankment and the influence of soil arching effect on the earth pressure on culvert crown, a series of model tests on controlled settlement were carried out using three different diameter aluminum rods with analogical embankment backfill. In the process of controlling the settlement of aluminum rods, photographs of aluminum rods with different relative displacements were taken by a digital camera, and the MATLAB software was used to run a program to extract the whole-field displacement values of aluminum rods from the image acquisition of the photographs by particle image velocimetry technique. The evolution law of soil arching on culvert crown was investigated under different differential settlement (Δs) and different filling heights (H). The results show that with the change in Δs, the soil arching has experienced three stages, which are formation, evolution, and stability. The height of soil arching in a critical state is about 1.5 times of the culvert width (D), and the inclination angle of the shear plane (θ) is 15° after the stabilization of the embankment settlement. The calculation of earth pressure on the culvert crown considering the soil arching effect is proposed as (1) earth pressure on culvert crown considering incomplete soil arching; (2) earth pressure on culvert crown considering complete soil arching. Finally, by comparing the calculated results with the measured values, the difference is about 10%, which illustrates the applicability of the proposed calculation method of earth pressure on culvert crown considering the soil arching effect.
Model Test Investigation of Soil Arching Development Above Reinforced Concrete Culvert Underneath Embankment
https://orcid.org/http://orcid.org/0000-0003-1661-5811
A trapdoor system has frequently been used to study soil arching and its development. The load transfer in the fill of embankments is very similar to a trapdoor system. In order to study the displacement mode of the embankment and the influence of soil arching effect on the earth pressure on culvert crown, a series of model tests on controlled settlement were carried out using three different diameter aluminum rods with analogical embankment backfill. In the process of controlling the settlement of aluminum rods, photographs of aluminum rods with different relative displacements were taken by a digital camera, and the MATLAB software was used to run a program to extract the whole-field displacement values of aluminum rods from the image acquisition of the photographs by particle image velocimetry technique. The evolution law of soil arching on culvert crown was investigated under different differential settlement (Δs) and different filling heights (H). The results show that with the change in Δs, the soil arching has experienced three stages, which are formation, evolution, and stability. The height of soil arching in a critical state is about 1.5 times of the culvert width (D), and the inclination angle of the shear plane (θ) is 15° after the stabilization of the embankment settlement. The calculation of earth pressure on the culvert crown considering the soil arching effect is proposed as (1) earth pressure on culvert crown considering incomplete soil arching; (2) earth pressure on culvert crown considering complete soil arching. Finally, by comparing the calculated results with the measured values, the difference is about 10%, which illustrates the applicability of the proposed calculation method of earth pressure on culvert crown considering the soil arching effect.
Model Test Investigation of Soil Arching Development Above Reinforced Concrete Culvert Underneath Embankment
Iran J Sci Technol Trans Civ Eng
Ma, Qiang (author) / Hu, Bin (author) / Xiao, Henglin (author) / Chen, Zhi (author) / Ku, Zhun (author)
2022-12-01
13 pages
Article (Journal)
Electronic Resource
English
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