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Yamamoto, K.; Miyata, T.; Motooka, N.; Hattori, A.

doi:10.3151/coj.47.8_34

Cited by 3 publications

(3 citation statements)

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“…In addition, the consideration of the environmental effect of construction is also a big issue, especially in population‐concentrated urban areas, due to existing buildings, roads, and residents. To prevent public nuisance, such as noise, vibration, and dust, during construction, a top‐down construction method is widely used in major Asian cities in Korea, China, Japan, Singapore, and Taiwan . Top‐down construction methods have the advantage of being able to protect nearby buildings as well as underground structures and can thus be applied as an alternative construction method to the conventional bottom‐up construction method.…”

Section: Introductionmentioning

confidence: 99%

“…To prevent public nuisance, such as noise, vibration, and dust, during construction, a top-down construction method is widely used in major Asian cities in Korea, China, Japan, Singapore, and Taiwan. [1][2][3][4] Top-down construction methods have the advantage of being able to protect nearby buildings as well as underground structures [5][6][7] and can thus be applied as an alternative construction method to the conventional bottom-up construction method. Using the top-down method also enables the simultaneous construction of both the superstructure and substructure, which reduces the construction period significantly.…”

Section: Introductionmentioning

confidence: 99%

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Load‐sharing ratio of prebored and precast pile in top‐down method construction process

Kim

Jeong

Jung

et al. 2018

Structural Design Tall Build

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Summary The load‐sharing ratio of the prebored and precast pile in top‐down method foundation was investigated by using a numerical analysis and field case study. The emphasis was on quantifying the apparent load‐sharing ratio of the prebored and precast pile during the top‐down method construction process. A series of three‐dimensional finite element analysis were conducted, with special attention given to the pile load‐sharing ratio under various conditions, such as soil condition, pile geometry, pile length, and structure load. In addition, the load‐sharing ratio of a single pile was also investigated based on the location of the pile in the raft (footing). The analysis model was validated by comparing the analysis model with the field data of an actual construction site using the prebored and precast pile and the top‐down method. On the basis of the series of analysis results and the field measurements, when the soil condition is better than weathered rock and for moderate pile length, at least 15% of the total structure load was supported by the pile throughout the construction process. Furthermore, it was shown that the pile near the center of the raft carried more structure load compared with the piles in the side and the corner of the raft.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Load‐sharing ratio of prebored and precast pile in top‐down method construction process

Kim

Jeong

Jung

et al. 2018

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…Meanwhile, top-down construction has the advantage of being able to protect surrounding buildings and underground infrastructures (Tatum et al 1989;Song et al 2009) and can thus be employed as an alternative method to traditional bottomup construction. Top-down construction has actually been used in crowded Asian cities in Taiwan, Singapore, China (especially Hong Kong and Shanghai), Japan, and Korea (Moh, Chin 1994;Zhu et al 2006;Yamamoto et al 2009). The demand for top-down construction has also increased because of the ability to construct both superand sub-structures simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Development of an Optimum Pre-Founded Column System for Top-Down Construction

Rhim

Kim

2012

Journal of Civil Engineering and Management

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In this work, circular concrete-filled steel tubular (CCFT) columns, rather than the more popular H-shaped columns, were suggested as pre-founded columns for top-down construction. In addition, a novel shear connection system with headed stud shear connectors between the CCFT columns and the flat slabs was developed. It was noted that a CCFT column with a design compressive strength similar to that of an H-shaped column without consideration of length effects can be easily installed, even into a smaller borehole. Furthermore, compared to the H-shaped column, less steel is required for the CCFT column. It was shown that the amount of steel needed can be reduced by decreasing the wall thicknesses or diameters of the CCFT column depending on the exposed length of the column during excavation. The fillet-welded joint of the developed shear connector system was also tested before its in-situ application. The test results revealed that the joint possessed sufficient shear and deformation capacities. The CCFT column with the developed shear connection system was ultimately applied to an actual top-down construction process. The good constructability of the CCFT column system and reductions in construction costs and time were confirmed.

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Estimation of the Load Sharing Ratio of Pre-installed Columns in Top-Down Buildings on Korean Rock

Jeong

Kim

2018

KSCE J Civ Eng

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Cited by 3 publications

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Load‐sharing ratio of prebored and precast pile in top‐down method construction process

Load‐sharing ratio of prebored and precast pile in top‐down method construction process

Development of an Optimum Pre-Founded Column System for Top-Down Construction

Estimation of the Load Sharing Ratio of Pre-installed Columns in Top-Down Buildings on Korean Rock

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