Ground reinforcement work | SMD method to optimize pile layout for mid-rise buildings and steel structures.
Ground reinforcement work
The SMD method optimizes pile layout with its enormous tip support strength due to a special inner and outer wing structure, significantly reducing foundation costs for mid-rise buildings and steel structures.
Ground reinforcement work is an essential process to eliminate the risk of settlement that buildings face and to ensure long-term safety from a structural foundation perspective. In particular, insufficient ground measures in mid-rise steel and reinforced concrete structures, as well as large constructions that require high ground bearing capacity, can lead to distortion of the structure and serious defects. The SMD pile method provided by Geotech Co., Ltd. is a small-diameter rotary penetration steel pipe pile method certified by the Minister of Land, Infrastructure, Transport and Tourism, featuring special outer and inner wings attached to the open-type steel pipe tip. During rotary penetration, the inner wings appropriately capture soil to suppress core deviation during excavation, and when the target depth is reached, the soil inside the pipe completely blocks it, demonstrating tremendous end bearing capacity. This excellent support performance allows for a reduction in the number of piles and a decrease in the shaft diameter compared to conventional precast concrete piles and large-diameter piles, significantly optimizing the overall layout plan of foundation work. Our company has established a consistent system from prior foundation design support to on-site construction and torque data management, proposing ground reinforcement that ensures structural safety and achieves substantial cost reductions.
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basic information
The SMD pile driving method is a rotary-driven steel pipe pile method that has received certification from the Minister of Land, Infrastructure, Transport and Tourism (TACP-0112/0113, etc.). It uses STK400 and STK490 steel pipes with a main axis diameter ranging from φ89.1 mm to φ267.4 mm, and is equipped with cast iron wings at the tip that are 2 to 3 times the diameter of the axis. The maximum construction depth can be applied up to 130 times the axis diameter (up to a maximum of 34.8 m), and it is suitable for sandy and clayey ground. It is equipped with a public bearing capacity calculation formula based on the N value from standard penetration tests, providing high safety margins and enabling rational structural calculations with high-quality specifications.
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Applications/Examples of results
The SMD method is ideal for reinforcing the foundations of mid-rise steel and RC buildings that require high design ground bearing capacity, as well as for 3 to 4-story buildings, apartment complexes, and large retail stores. It is particularly effective for structures where conventional surface improvement or columnar improvement lacks sufficient bearing capacity, and where large precast concrete piles would be over-spec and costly. By leveraging high tip bearing capacity, it aims to reduce the number of piles and expand foundation spans, making it widely used in construction projects that seek to simultaneously compress construction costs and shorten construction periods.
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