ESTIMATING LIQUEFACTION RESISTANCE IMPROVEMENT DUE TO STONE COLUMNS FROM QUALITY CONTROL TESTS

Liquefaction of saturated sands remains an important topic in Geotechnical earthquake engineering. Amongst various review measures available,the use of CFG Column and stone columns Composite foundation to prevent liquefaction can achieves good results. In this paper, a detailed review on effectiveness of densification, drainage and reinforcement of CFG column and stone columns Composite foundation for the resistance of soil liquefaction during earthquakes is presented.

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Experience in the design and operation of retaining walls of overpasses of the Central Ring Road on the base with soil improvement by vibro stone columns

E3S Web of Conferences ◽

10.1051/e3sconf/202126302004 ◽

2021 ◽

Vol 263 ◽

pp. 02004

Author(s):

Sergey Rytov ◽

Ilya Iovlev ◽

Tatyana Rytova

Keyword(s):

Quality Control ◽

Soil Properties ◽

Retaining Walls ◽

Soil Improvement ◽

Stone Columns ◽

Optimal Result ◽

Central Ring ◽

Ring Road

Reinforced retaining walls were used on the overpasses of the Central Ring Road. To reduce the sedimentation of the base of these walls, to reduce the time of consolidation of the base, the transformation of soil properties by reinforcing vibro stone columns was used. In order to obtain an optimal result for the transformation of the properties of the base soils, increasing the reliability of the reinforced structures, comparative calculations were carried out with the variation of the parameters of the reinforcing elements. The method of quality control of the device vibro stone columns is improved.

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Vibro-Replacement Stone Column Treating Silty Sand Soil Subgrade

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.256-259.1060 ◽

2012 ◽

Vol 256-259 ◽

pp. 1060-1063 ◽

Cited By ~ 1

Author(s):

Yu Qing Yuan ◽

Wei Li ◽

Xue Chan Li ◽

Tao Guo

Keyword(s):

Quality Control ◽

Numerical Analysis ◽

Horizontal Displacement ◽

The Other ◽

Silty Sand ◽

Stone Columns ◽

Stone Column ◽

Analysis Software ◽

Sand Soil ◽

Soft Foundation

To improve the wet soft silty sand bearing capacity, vibro-replacement stone column was used. Compared with the practical construction, this paper introduces the vibro-replacement stone column strengthening soft foundation. The principle of the construction, quality control, and inspection technology were discussed. Based on Drucker - Prager elastic-plastic model, different high wet soft foundation was simulated with the numerical analysis software. Results show that vibro-replacement stone column can significantly reduce the roadbed horizontal displacement. The displacement of the subgrade reinforced by stone columns decreases respectively 0.1, 0.2, 0.6, 2.3 cm than the other. If the subgrade is 4 m in height, the displacement reaches 0.2, 0.5, 0.7 cm when the length of stone column is 5, 10, 15m, respectively. To sum up, five - metre long pile is more economic and reasonable.

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