大亜ソイル List of Products and Services

In abandoned coal mine sites, there are often cases where cavities of various sizes remain underground, posing a risk of concrete leakage during pile construction. The Reseau fond pier method easily covers the outside of the rebar cage with a Reseau fond net, preventing leakage into the cavities and ensuring the designed cross-section is maintained. Due to its lightweight nature, it is easy to handle and can be implemented without compromising construction efficiency. It has a wealth of proven results in both public and private projects and is increasingly adopted as a reliable quality improvement method. This method is useful for projects that aim to ensure reliable pile quality in the special ground conditions of abandoned coal mines. *For more details, please check by clicking the "Download Catalog" button.

• Special Construction Method

In areas where underground cavities exist or in special ground conditions, the concrete being poured is prone to flowing into unknown areas, which constantly poses risks to the construction schedule, quality, and cost. The Reseau fond Pier method achieves stable pile construction while suppressing outflow by covering the rebar cage with a high-durability net. It demonstrates effectiveness even in sites where ground conditions cannot be fully understood in advance, contributing to the prevention of construction troubles and the stabilization of quality. Since it can be applied simply by adding it to existing methods, the barrier to implementation is low, and it has been widely adopted across the country. It can be utilized as a reliable outflow countermeasure in sites with significant uncertainties. *For more details, please check by clicking the "Download Catalog" button.

• Special Construction Method

Volcanic ash soil has a coarse particle structure, making it prone to diffusion of concrete, which poses a challenge of quality degradation due to runoff during pile formation. The Reseau fond Pier method involves a simple construction process where a net is wrapped around the pile reinforcement cage, preventing runoff into the volcanic ash soil. It also minimizes the inclusion of impurities, ensuring the pile quality meets design specifications. Due to its lightweight nature, the net is easy to handle on-site. It can be used in combination with a wide range of construction methods, such as earth drills and all-casing techniques. This method is helpful in addressing construction challenges arising from the ground characteristics of volcanic ash regions. *For more details, please check by clicking the "Download Catalog" button.*

• Special Construction Method

In limestone layers with cracks, there is a possibility that concrete may flow out through the fissures, leading to increased costs and insufficient pile cross-sections. The Reseau fond pier method covers the perimeter of the rebar cage with a highly durable net, effectively preventing outflow into the cracks, which allows for reduced concrete loss and stable quality. It can be used with various pile methods and can be applied without increasing the burden of construction, which is a significant feature. It boasts over 250 adoption cases in both public and private sectors. It is recommended for sites pursuing reliable pile construction in uncertain limestone ground. *For more details, please check by clicking the "Download Catalog" button.*

• Special Construction Method

Ryukyu limestone is prone to forming cavities due to dissolution, making it a region with a high risk of concrete flowing out during pile construction. The Reseau fond pier method covers the perimeter of the rebar cage with a Reseau fond net, ensuring reliable concrete placement while preventing flow into cracks and dissolved voids. The net is made of permeable synthetic fibers, making it lightweight and highly retaining, allowing for efficient construction without reducing work efficiency. Since it is simply an addition to existing methods, it is easy to implement and helps keep costs down. This method significantly contributes to improving the quality and reliability of piles in the Ryukyu limestone region. *For more details, please check by clicking the "Download Catalog" button.*

• Special Construction Method

In soft clay layers, there are many cases where mud mixes in during concrete placement, leading to a decrease in pile strength and variations in quality. The Reseau fond Pier method prevents the inclusion of soil and impurities by covering the outside of the pile rebar cage with a Resonfon net, ensuring that the concrete is securely retained. The chemical fiber net demonstrates high retention power while being permeable, and it also excels in workability. Since it can be applied simply by adding it to conventional methods, it allows for quality improvement while minimizing the burden on the site. This method is recommended for sites that want to ensure reliable pile construction in soft clay layers. *For more details, please check the "Download Catalog" button.

• Special Construction Method

The peat layer is extremely soft, and traditional pile construction carries a high risk of concrete leakage, making quality assurance a challenge. The Reseau fond pier Method effectively suppresses concrete leakage by covering the pile reinforcement cage with a Reseau fond net. It enables stable pile construction even in sites with low ground strength. It uses a lightweight and easy-to-handle polyethylene permeable lattice fabric, which can be introduced without increasing construction effort. It accommodates various methods, including earth drill methods and all-casing methods. There are over 250 successful projects in both public and private construction. This method is helpful for ensuring quality and controlling costs in pile construction on peat ground. *For more details, please check by clicking the "Download Catalog" button.

• Special Construction Method

The "NS Eco Pile" is a revolutionary rotary-driven steel pipe pile developed by Nippon Steel Corporation (formerly known as Nippon Steel & Sumitomo Metal Corporation). It is a steel pipe pile with spiral wings welded to the tip, allowing for construction with no soil displacement, low noise, and low vibration by rotating and driving the steel pipe using a full rotary machine. <Features> ■ No soil displacement… No mud or residual soil is generated. ■ Low noise and low vibration… Achieves low noise and low vibration construction through the rotary driving method. ■ Usable with general machinery… Construction can be performed using general machinery such as three-point support pile drivers and full rotary machines. ■ Retrievable… The pile can be extracted and removed by rotating it in reverse. This is effective for temporary construction. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

During concrete placement, protect the hole walls from horizontal holes, drainage ditches, and other underground water. This prevents collapse and the inclusion of soil and impurities, enabling the construction of high-quality piles. By covering the pile shell with a Reseau fond net, it is possible to prevent concrete runoff even in soft ground such as peat layers and landfill sites, as well as in ground with flowing water. The pile shell is covered with a Reseau fond net, which helps prevent hole wall collapse. <Features> ■ Versatile use… Applicable to various methods such as earth drilling, all casing methods, and underground continuous wall methods. ■ Over 200 successful projects… Extensive experience in public works such as those by the Ministry of Land, Infrastructure, Transport and Tourism, as well as in private construction. ■ Simple construction method… Uses a permeable synthetic fiber (made of polyethylene) mesh fabric. In addition to being economical, it is lightweight and easy to handle. *For more details, please download the PDF or feel free to contact us.

• Special Construction Method

Bored concrete piles using steel pipes with protrusions (welded molded protrusions) that excel in integration with concrete on the inner surface of the steel pipe. The protrusions can be selected from two types: one located at the lower part of the steel pipe and the other at the upper and lower parts. They can be chosen according to design conditions, achieving low cost and high quality. Acquired evaluation from the Japan Building Center, a general incorporated foundation: - BCJ F-560 (July 31, 1990) - BCJ Evaluation-FD0416-03 (January 29, 2016) <Features> ■ Earthquake resistance… High bending resistance and holding capacity. Excellent safety during earthquakes. ■ Economic efficiency… High design flexibility allows for the selection of structural types according to design conditions. ■ Environmental consideration… The pile diameter can be slimmed down, reducing the amount of excavated soil. *For more details, please download the PDF or feel free to contact us.

• Earthquake-resistant construction method

The "HND method" is a construction technique that involves using an earth drill excavator's drilling bucket to excavate the shaft of a pile to a specified depth in the bearing layer, and then using a bell-shaped bucket to expand the excavation in a conical shape, creating a cast-in-place concrete pile with a larger tip area. As a result, it achieves bearing capacity equivalent to that of a straight pile, and compared to straight piles with the same load-bearing capacity, it significantly reduces the amount of excavated soil and concrete, allowing for not only a shortened construction period but also cost savings. 【Features】 ■ By using a belled pile, equivalent bearing capacity can be achieved even with a smaller shaft diameter. ■ Reduction in concrete volume and excavated soil volume. ■ Reduced environmental impact. *For more details, please download the PDF or feel free to contact us.

• Ground foundation construction method
• Pile and foundation work