Acquisition of technical evaluation: A mechanism that is easy to repair without compromising the basic performance, enabling inexpensive and rapid repairs during liquefaction.
What are reliable ground improvement methods for liquefied ground? - The occurrence of earthquakes cannot be predicted. - The magnitude of earthquakes cannot be predicted. - The presence or absence of liquefaction cannot be predicted. - The extent of liquefaction cannot be predicted. - The amount of differential settlement due to liquefaction cannot be predicted. - The cost of repair work cannot be predicted. Therefore, based on the premise that some degree of differential settlement damage to single-family homes during an earthquake is unavoidable, we considered that by incorporating a mechanism during new construction that allows for leveling a tilted foundation using a mode cell anchor bolt with an adjustable length via a movable nut, it would be possible to carry out repairs without compromising the original strength of the foundation. The mode cell method, realized for the first time with the mode cell anchor bolt, is the solution.
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basic information
The housing damage caused by liquefaction, which resulted in significant destruction during the Great East Japan Earthquake, amounted to approximately 27,000 buildings across one metropolitan area and eight prefectures. As a result, since the earthquake, major construction and ground improvement companies have been developing and implementing liquefaction countermeasures. However, the current situation is that these measures are often large-scale and expensive, and since they have not been tested in actual earthquakes, their effectiveness remains unverified, leading to unclear cost-effectiveness.
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Company information
Our company was founded in 1958 and specializes in underground special civil engineering works such as underground continuous walls, underground obstacle removal, ground improvement, and pipeline construction. In recent years, we have expanded our business operations to include slope work and construction. There is a growing social demand for securing the natural environment, seismic reinforcement, liquefaction prevention, restoration of structures, and urban redevelopment, which have become pressing issues in recent years. In response to these social needs, we have developed seismic reinforcement and liquefaction countermeasure methods such as the "Ultra Multi-Point DP Method" and the "High Grip Grout Method." For structural restoration, we utilize our in-house developed restoration method called "Suiheikun," and for urban redevelopment, we are conducting research and development of new methods such as the "Hiro Work Kmigty Method," "Bauer Method," and "Super Top Method," aimed at underground obstacle removal. Additionally, as part of our eco-friendly initiatives, we are researching and developing methods that use bubble drilling fluid to reduce industrial waste, striving to contribute to society through high-quality construction and services. We aim to continue responding to the needs of the times by deploying a variety of specialized techniques and uniquely developed methods.