Since the bearing capacity of piles has increased with the development of high bearing capacity piling method, hyper-concrete strength piles with specified design strengths of Fc=105 N/㎟ and 123 N/㎟ have become widely used in addition to conventional high-strength piles with a specified design strength of Fc=85 N/㎟. Furthermore, we provide mechanical joints in addition to welding joints.
Precast concrete piles are constructed by driving, pre-boring, and inner boring. For the SC piles that are often installed as the upper pile, we recommend RSC or RSCP piles, which make it easier to chip the rebar inside the pile. Welding or mechanical joints can be used.
For joining precast piles, mechanical joining methods that can be used in windy and raining construction environment, and that greatly reduce construction times becoming more widespread than conventional welded joints. Furthermore, the fixed main reinforcement method and semi-fixed cap method are becoming more common for pile head treatment than the conventional packed reinforcement method.
We offer proposals for installing geothermal heat exchangers into piles and reducing the load on the environment. In our geothermal power systems, heat exchangers consisting of U-shaped resin pipes are inserted during the construction of various foundation piles, providing stable heat exchange with geothermal heat throughout the year. This allows cost reductions compared to dedicated geothermal heat exchange holes (bore holes).
This is the general name for methods certified by the Japanese Ministry of Land, Infrastructure, Transport and Tourism for a pile tip bearing capacity coefficient α of over 250. We provide pre-boring based high bearing capacity piling methods including the Hyper-straight method and Hyper-MEGA method, and inner boring methods including the Hyper-NAKS method. The choice depends on site conditions.
In general, methods where the pile tip bearing capacity coefficient α is 250 or less refer to the cement milk pile construction method described in Japanese Ministry of Land, Infrastructure, Transport and Tourism guidelines and the former ministry certified construction method. Our company offers the NAKS and RODEX methods, which meet the Japanese Specifications for Highway Bridges.
Construction methods using steel pipe piles in civil engineering and building construction fields include the inner boring method, pre-boring construction method, and driving method, as in the case of concrete piles. Our company offers the “Gantetsu Pile Method” which meets the Japanese Specifications for Highway Bridges.
This is a method for creating cement improved pile foundations with a strength or around 300 kN/m2 by mixing the original ground with slurry cement. It can also be used as a measure for preventing soil liquefaction. We provide the NC column construction method, which has been granted a construction technology evaluation certificate.
During building replacement construction, if existing piles are an obstacle to the new design, they need to be removed, and this is done by using a casing slightly larger than the pile diameter.