Ground reinforcement work | A reliable structure that prevents differential settlement accidents of buildings using the high-support capacity DM method.
Ground reinforcement work
Large cast iron wings and bolt-fixed structures boasting a diameter up to 3.5 times that of steel pipes. The DM method demonstrates tremendous tip support strength, eliminating subsidence accidents in small-scale buildings.
GeoTech Co., Ltd. offers the "DM Method (Double Metal Method)" nationwide, which is a small-diameter steel pipe pile ground reinforcement technology that completely prevents differential settlement accidents in buildings and ensures long-term safety. In ground reinforcement work that firmly supports buildings, this method employs a unique design that attaches large ductile cast iron tip wings with diameters of 3.0 times (290mm) and 3.5 times (350mm) the shaft diameter of 101.6mm steel pipes. By enhancing joint strength with robust bolt fixation, it exhibits tremendous tip support strength in the ground. The construction method, which does not use cement and employs non-displacement rotary penetration, does not disturb the ground and enables low-noise and low-vibration construction in the surrounding environment. It has obtained GBRC performance certification (No. 10-01) and allows for reliable allowable bearing capacity calculations based on SWS testing. Through in-house component management, a nationwide network of construction association members, and real-time data tracking using construction management devices, it strongly protects the asset value of clients over an extended period with high strength and complete quality assurance.
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basic information
The Japan Architectural Comprehensive Testing Institute has obtained GBRC performance certification (No. 10-01). The steel pipe used has a diameter of 101.6mm (STK400), and the tip is structured by bolting a ductile cast iron (FOD450A) enlarged wing (290mm/350mm). The applicable ground consists of sandy and clayey soils with an average equivalent N value of 5 to 15, and the maximum construction depth can reach 130 times the diameter (13.2m). The structure features a high-strength design with a steel pipe of STK400 (outer diameter 101.6mm) and a large tip wing made of ductile cast iron (FOD450A) fixed with bolts. The enlarged wing diameter can be selected as either 290mm (3.0 times) or 350mm (3.5 times). The applicable ground is sandy and clayey soils with an equivalent N value of 5 to 15, and the maximum construction depth can accommodate up to 130 times the diameter (13.2m) from the construction ground surface. It achieves reliable settlement prevention with high tip bearing capacity. Based on WS tests, it is possible to accurately calculate the allowable reinforcement material strength.
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Applications/Examples of results
It is ideal for single-family homes and multi-family residences, small-scale stores, and the foundation reinforcement of retaining walls and structures with a height of 3.5 meters or less, that are three stories or fewer, with a height of 13 meters or less, a eave height of 9 meters or less, and a total floor area of 500 square meters or less. It demonstrates its effectiveness on sites with soft ground where there is a high risk of settlement and a need for high bearing capacity, as well as on structures with significant building loads, such as three-story buildings. It meets the practical needs of contractors who absolutely want to avoid differential settlement accidents and designers who prioritize the long-term safety and security of residents.
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