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A platform for research: civil engineering, architecture and urbanism
Installation behavior of an underwater rammed stone column in clay
https://orcid.org/http://orcid.org/0000-0002-2519-6818
A new underwater rammed stone column (U-RSC) is proposed to construct the composite foundation in the seabed. A series of laboratory model tests were conducted to investigate the feasibility and installation behavior of the proposed technology. The test results showed that the U-RSCs installed in clay are influenced by the tamping energy, single filling mass, and soil strength. The profile shapes are wedge shapes tapering toward the base with their maximum expansion position located approximately 1.5 d from the ground surface. The soil heave was observed during the installation of U-RSC into the clay with its maximum influence distances of approximately 4 times hole diameter in the model tests. The tamping-induced excess pore pressure did not fully dissipate to zero but continuously accumulated after the continuous filling and tamping process. It is observed through the lateral earth pressure contour maps that the tamping energy compacted vertically the gravel and laterally the surrounding soil. Based on their influences to the surrounding soil, the soil around the column could be divided into the penetration zone, the high-densified zone, and the low-influenced zone. The proposed U-RSC method provides a new, effective and practical method to construct composite foundation for underwater soil improvement.
Installation behavior of an underwater rammed stone column in clay
https://orcid.org/http://orcid.org/0000-0002-2519-6818
A new underwater rammed stone column (U-RSC) is proposed to construct the composite foundation in the seabed. A series of laboratory model tests were conducted to investigate the feasibility and installation behavior of the proposed technology. The test results showed that the U-RSCs installed in clay are influenced by the tamping energy, single filling mass, and soil strength. The profile shapes are wedge shapes tapering toward the base with their maximum expansion position located approximately 1.5 d from the ground surface. The soil heave was observed during the installation of U-RSC into the clay with its maximum influence distances of approximately 4 times hole diameter in the model tests. The tamping-induced excess pore pressure did not fully dissipate to zero but continuously accumulated after the continuous filling and tamping process. It is observed through the lateral earth pressure contour maps that the tamping energy compacted vertically the gravel and laterally the surrounding soil. Based on their influences to the surrounding soil, the soil around the column could be divided into the penetration zone, the high-densified zone, and the low-influenced zone. The proposed U-RSC method provides a new, effective and practical method to construct composite foundation for underwater soil improvement.
Installation behavior of an underwater rammed stone column in clay
https://orcid.org/http://orcid.org/0000-0002-2519-6818
A new underwater rammed stone column (U-RSC) is proposed to construct the composite foundation in the seabed. A series of laboratory model tests were conducted to investigate the feasibility and installation behavior of the proposed technology. The test results showed that the U-RSCs installed in clay are influenced by the tamping energy, single filling mass, and soil strength. The profile shapes are wedge shapes tapering toward the base with their maximum expansion position located approximately 1.5 d from the ground surface. The soil heave was observed during the installation of U-RSC into the clay with its maximum influence distances of approximately 4 times hole diameter in the model tests. The tamping-induced excess pore pressure did not fully dissipate to zero but continuously accumulated after the continuous filling and tamping process. It is observed through the lateral earth pressure contour maps that the tamping energy compacted vertically the gravel and laterally the surrounding soil. Based on their influences to the surrounding soil, the soil around the column could be divided into the penetration zone, the high-densified zone, and the low-influenced zone. The proposed U-RSC method provides a new, effective and practical method to construct composite foundation for underwater soil improvement.
Installation behavior of an underwater rammed stone column in clay
Acta Geotech.
Wang, Xin (author) / Guo, Wei (author) / Ren, Yu-Xiao (author) / Xu, Hao (author) / Kang, Yi-Fei (author)
Acta Geotechnica ; 19 ; 3213-3228
2024-05-01
16 pages
Article (Journal)
Electronic Resource
English
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