Abstract
This paper presents a case history of observed performance of highway embankment over soft marine clay in Wenzhou, China. During the embankment construction, the changes of ground settlement, ground displacement, and lateral displacement of subsoil with the construction time were monitored and analyzed. The monitoring results indicate that the ground settlement and lateral displacement of subsoil account for about 75% in the process of embankment construction. The measured maximum values of ground settlement, ground displacement, and lateral displacement of subsoil are 37.88 mm, 21.50 mm, and 23.56 mm, respectively. After the completion of the embankment construction, the settlement gradually tended to be stable. It is suggested that the monitoring data of settlement and displacement of embankment are smaller than the design requirements, and the embankment stability is also ensured.
Highlights
Wenzhou is located in the southeastern coastal area of China, and the Feiyun River flows through Wenzhou
Most of the areas near the Feiyun River are alluvial deposits formed in Quaternary [1,2,3,4]. e Quaternary alluvial deposits have a high water content, high compressibility, and lower carrying capacity [5,6,7,8,9] and maybe induce many incidents during engineering construction [10]
A case study for highway construction over soft marine clay in China is presented in this paper. e obtained results from this study are summarized as follows: (1) e settlement on the left side of the embankment was larger than that on the right side. e final cumulative settlement of each section near the river side was the largest, which was 34.33 mm, 37.88 mm, 24.77 mm, 23.20 mm, and 22.66 mm, respectively
Summary
Wenzhou is located in the southeastern coastal area of China, and the Feiyun River flows through Wenzhou. E Quaternary alluvial deposits have a high water content, high compressibility, and lower carrying capacity [5,6,7,8,9] and maybe induce many incidents during engineering construction [10]. This clay alluvial deposit consists of predominated clay mineral such as illite, smectite, and kaolinite [11, 12], resulting in poor engineering characteristics [13]. When highway embankments are constructed on alluvial deposits, the soft soils often bear intolerably large settlements or fail due to insufficient bearing capacity. It is suggested that the monitoring data of settlement and displacement of embankment are smaller than the design requirements
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