Kolon Global Corporation

Kyoung Chul Kim

Se Jin Kim

Jae Seo Choi

Jae Uk Sim

Sung Gon Son

Sang Heon Choi

Provided is a ground reinforcement structure installed on a ground () in which a sandy soil layer () having a weak surface layer is provided and thus large-caliber excavation is difficult to be performed, the ground reinforcement structure including a ground reinforcement material () including: an expansion-type steel pipe () inserted to be installed in a small-caliber drilled portion (A) having a diameter of 51 mm to 61 mm and expanded by hydraulic pressure; and a settlement member () coupled to a rear end of the expansion-type steel pipe (). Here, the expansion-type steel pipe () is inserted into the sandy soil layer (), and the settlement member () is inserted into a rock layer (). In this case, the settlement member () of the ground reinforcement structure according to the present invention is fixed to the rock layer (), fixing force is excellent.

Ground reinforcement structure and construction method thereof

The present invention provides a seawater resistant grout material composition and a method for constructing an offshore wind turbine structure using the same, the seawater resistant grout material composition comprising: 2&#x2dc;10 wt % of high strength admixture; 25&#x2dc;35 wt % of type I Portland cement; 30&#x2dc;45 wt % of silica sand having a particle size of 30&#x2dc;60 mesh; 5&#x2dc;15 wt % of silica sand having a particle size of 60&#x2dc;100 mesh; and 5&#x2dc;10 wt % of silica sand having a particle size of 100&#x2dc;200 mesh, wherein the high strength admixture is obtained by mixing and pulverizing 45&#x2dc;99 wt % of slag and 1&#x2dc;55 wt % of anhydrite, thus the present invention has excellent seawater resistance, excellent strength development characteristics at a low temperature, and increased compressive strength and durability to allow withstanding cyclic loads due to wind and wave pressure.

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Seoul, South Korea

Kyoung Chul Kim