プロテックエンジニアリング List of Products and Services

The "QT Fence" is a temporary protective fence that can be used for emergency measures and temporary measures after a disaster. We conducted a free-fall weight drop test on a real specimen to confirm its rockfall capture performance. The applicable range for accumulated soil is approximately 1 meter. The foundation is constructed using "single pipes" primarily for on-site use, eliminating the need for large-scale foundations, allowing it to be installed not only along roads but also on slopes. ■ Waiting-type temporary protective fence ■ Complies with rockfall countermeasure guidelines *For more details, please download the PDF or feel free to contact us.

• Temporary Construction

The "Slope Guard Fence Type LE" is a vertical type of protective fence designed to catch collapsing soil and is installed near residential areas or along roads that are close to slopes with a risk of landslides. It prevents the outflow of soil using panel-type wire nets and wire mesh installed between the support posts. Compared to traditional gravity retaining walls, it requires less installation space and generally does not need special ground improvement even in poor ground conditions. ■ Compliant with the Disaster Prevention Act ■ Structure considering soil impact force and accumulated soil pressure ■ Vertical protective fence with pile foundation structure ■ Measures against collapsing soil near roads and behind houses ■ Effectively installable in "narrow spaces" and "soft ground" Ministry of Land, Infrastructure, Transport and Tourism New Technology Information Provision System (NETIS) Registration Number: HR-100008-VR *Registration period has ended "Evaluation Promotion Technology (New Technology Utilization System Study Meeting (Ministry of Land, Infrastructure, Transport and Tourism))" *For more details, please download the PDF or feel free to contact us.

• Retaining wall
• Other earthworks, foundation works, and exterior floors
• Civil Engineering Method

The "Rockfall Survey App" is an iPhone application developed with the desire to create a world where rockfall surveys can be conducted safely, and with the aim of improving productivity through the automation and simplification of tasks. By using the app, the number of survey tools is reduced, allowing for safe surveys even on unstable slopes, and it also shortens the time spent on tasks such as data entry and photo organization for document preparation in the office. ■Significantly reduces the time required for rockfall survey operations ■Supports efficient rockfall surveys and contributes to improved safety ■Download and app usage fees are free *For more details, please download the PDF or feel free to contact us.

• Other civil engineering services

The "ARC Fence" is a rockfall protection fence primarily installed on slopes to protect roads and homes from falling rocks. It offers six types corresponding to rockfall energies of 61 kJ, 106 kJ, 223 kJ, 316 kJ, 504 kJ, and 1,002 kJ, and all construction from drilling to fence installation can be done manually, making it economically efficient for rockfall measures on slopes. Additionally, by adjusting the spacing between the posts, it can be arranged in various terrains, and its lightweight and simple structure allows for easy installation. ■ Supports rockfall energy up to 1,002 kJ ■ Applicable to various terrains ■ Simple structure with excellent workability and cost-effectiveness ■ Extensive adoption track record nationwide Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: CB-020004-VE *Publication ended NETIS Evaluation Promotion Technology for Fiscal Year 2017 *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "SPARC Fence" is a slope-installed rockfall protection fence primarily designed to protect roads and houses from falling rocks. It can withstand rockfall energy of up to 318 kJ. Due to its structure, which does not use a damping device, it can also accommodate static loads from snow and collapsed earth. It is effective for rockfall measures in snowy regions and avalanche prevention on slopes with rockfall hazards. Additionally, it can be utilized as a temporary protective fence at construction sites for cut slopes and on weathered slopes. ■ Applicable for rockfall, avalanches, and collapsed earth ■ Supports rockfall energy up to 318 kJ ■ No damping device, resulting in low maintenance frequency ■ Minimal net deformation during rockfall capture Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-130008-A *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

Since it is a pile foundation structure that directly embeds the pillars into the ground, it can be constructed in various locations, including sites with limited installation space and on slopes. The pillars, which have high strength and excellent toughness, have been confirmed through full-scale experiments to be reusable even after capturing falling rocks. Compared to other methods, the need for component replacement after a disaster is minimized, making maintenance easy and reducing costs. ■ Two types available for rockfall energy resistance: 500 kJ and 1200 kJ ■ Vertical protective fence with pile foundation structure ■ Can be combined with measures against collapsing soil and avalanches ■ Easy maintenance after rockfall capture Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-100008-VR *Registration period has ended "Evaluation Promotion Technology (New Technology Utilization System Study Meeting (Ministry of Land, Infrastructure, Transport and Tourism))" *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Macro Fence" is a rockfall protection fence installed on slopes to protect roads and homes from rockfall disasters. It can withstand rockfall energy of up to 5000 kJ, making it effective for large-scale rockfall countermeasures. Due to the small deformation of the net during rockfall capture, it can be placed relatively close to the objects being protected. The deformation amounts of the nets for each type have been confirmed through experiments. By allowing for a configuration that is relatively close to the protected objects, the area required for land acquisition can be minimized, leading to expected cost reductions. ■ Slope-installed protection fence ■ Supports rockfall energy up to 5000 kJ ■ Effective for large-scale rockfall countermeasures ■ Available in five types according to the scale of rockfall Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-090007-A *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Slope Guard Net Type R" is a pocket-type rockfall protection net that covers slopes with a risk of falling rocks using wire ropes and wire mesh, safely guiding the rocks to the toe of the slope. It accommodates rockfall energy ranges of approximately 200 kJ and effectively covers medium-scale rockfall energy, where there have been few optimal methods among conventional techniques and high-energy absorption type pocket rockfall protection nets. ■ Covers the slope and guides falling rocks to the toe ■ Supports rockfall energy up to 200 kJ ■ Demonstrates cost-effectiveness for medium-scale rockfall measures ■ Also accommodates accumulated soil *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Loop Fence" is a vertical rockfall protection fence primarily installed along roads to prevent rockfall damage. It can withstand rockfall energy of up to 1506 kJ, making it effective for relatively large-scale rockfall countermeasures. By wrapping wire ropes in a loop between the posts, it reduces the deformation during rockfall capture. Its minimal protrusion towards the road allows for installation close to the roadside. ■ Catches rockfalls on roadsides and slopes ■ Supports rockfall energy up to 1506 kJ ■ Effective for large-scale rockfall countermeasures Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: SK-020001-V *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Geo-Lock Wall" is a reinforced earth wall designed to absorb falling rocks, landslides, and collapsing soil, primarily along roadsides and behind residential houses. It can withstand rockfall energy of up to 5500 kJ and is utilized for a wide range of rockfall countermeasures from small to large scale. It primarily uses soil and geosynthetics as materials. Due to the unique flexible structure of soil structures, it efficiently absorbs impacts and can handle large-scale impact energy. Because it is a soil structure, it can be installed in various terrains, including sites with limited installation space, sites with vertical gradients, and sites with valley topography. Additionally, it does not transmit impact forces to the supporting ground, so in most cases, ground improvement treatments are not necessary. ■ Rockfall, landslide, and collapsing soil countermeasures using reinforced earth ■ Capable of withstanding rockfall energy up to 5500 kJ ■ Available in three types according to the scale of rockfall ■ Over 540 adoption records nationwide Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-990009-V *Registration period has ended NETIS Fiscal Year 2016 Semi-Recommendation Technology *For more details, please download the PDF or feel free to contact us.

• Retaining wall
• Road construction
• Railway Construction

The "Super Rock Shed" is a construction method that covers roads and railways to prevent falling rocks from directly hitting the surface. A full-scale drop weight experiment, the largest in the world, was conducted, confirming that it can withstand rockfall energy of up to 8000 kJ. Since the main structure and the outer surface of the slab are made of steel, there are no secondary disasters caused by concrete spalling or similar issues. ■ Protects roads and railways from falling rocks ■ Capable of withstanding rockfall energy up to 8000 kJ ■ Effective for large-scale rockfall countermeasures Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-030001-A *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction

The "Reinforced Fence" is a method for strengthening existing rockfall protection fences that lack durability and height. It can increase the height of the protection fence up to a maximum of 6.0 meters and enhance the corresponding rockfall energy up to a maximum of 200 kJ. ■ Reinforcement of existing rockfall protection fences ■ Height increased up to a maximum of 6.0 meters ■ Rockfall energy increased up to a maximum of 200 kJ Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-110028-V *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Reinforced Fence L Type" is a reinforcement method that addresses the improvement of insufficient fence height and countermeasures for aging existing fences. By reusing the existing retaining wall, the construction period can be shortened compared to conventional measures. Previously, improving insufficient fence height required the removal and reinstallation of the fence or raising the height of the retaining wall with concrete. The Reinforced Fence L Type allows for the installation of new post bases on the retaining wall while keeping the existing posts in place, enabling the erection of new posts. This simple process reduces the overall cost of the project. ■ Compatible with falling rock energy below 61 kJ ■ Reuses existing retaining walls of falling rock protection fences ■ Reduces waste materials and lowers environmental impact ■ Shortens construction period and reduces waste disposal costs ■ Reduces road occupancy time during construction ■ Can be installed with a simple process *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

"Macro Net" is a covering net method that addresses everything from rockfall prevention to rockfall protection through a combination of wire mesh, wire rope, and anchors. There are two types based on the combination of components: covering rockfall protection net and specific boulder fixation. Both types use double-twisted wire hexagonal mesh (DT net) as the main component, which excels in tear resistance. The design can take into account debris loads after rockfalls and landslides, preventing tearing of the net from rocks and soil. ■ Covers slopes to prevent the occurrence and damage of rockfalls ■ Capable of addressing everything from rockfall prevention to protection through component combinations *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Dam construction

The "Slope Guard Fence Type LE" is a vertical type of collapse debris protection fence designed to catch collapsing soil near roads or behind houses. It prevents the outflow of soil using panel-type wire nets and wire mesh installed between the support posts. Due to its pile foundation structure, where the posts are directly embedded into the ground, it can be installed in various locations, including sites with limited space or on slopes. By adjusting the height of the fence, it is possible to secure pocket capacity for soil accumulation, minimizing alterations to the slope. It can withstand rockfall energy up to 318 kJ, making it suitable for a wide range of applications. ■ Measures against collapsing soil near roads and behind houses ■ Vertical protection fence with pile foundation structure ■ Structure considering soil impact force and accumulated soil pressure Ministry of Land, Infrastructure, Transport and Tourism New Technology Information Provision System (NETIS) Registration Number: HR-100008-VR *Registration period has ended "Evaluation Promotion Technology (New Technology Utilization System Study Meeting (Ministry of Land, Infrastructure, Transport and Tourism))" *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Pile and foundation work

The "QK Wall" is a reinforced earth wall installed on steep slopes behind residential houses to catch collapsing soil and debris. It absorbs and disperses impact forces by receiving soil at the top edge. Since it is a soil structure that does not require significant support, it can be installed in various site conditions with minimal ground improvement or treatment. Additionally, compared to gravity retaining walls, it allows for shorter construction periods and cost reductions. ■ Measures against collapses on steep slopes behind residential houses ■ Reinforced earth wall with excellent shock absorption ■ Structure considering soil impact forces and accumulated earth pressure Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: CB-090036-A *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Retaining wall
• Road construction
• Railway Construction

"MacroNet HR" is a slope stabilization system that combines a high-strength net made of double-twisted hexagonal wire mesh coated with weather-resistant PVC (polyvinyl chloride) and reinforced materials with pressure plates. By securing the high-strength net covering the target slope with reinforced materials and pressure plates, it achieves a tightening effect of over 100 kN. This prevents slope failures and the detachment of small unstable rock masses up to approximately 3.0 meters in depth. ■ Ideal for slope failure measures up to approximately 3.0 meters in depth ■ Achieves a tightening effect of over 100 kN ■ Cost reduction and shortened construction period due to a simple component structure Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: KT-190072-A *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Earth retaining wall/foundation reinforcement

The "SPARC Fence Type S" is an avalanche prevention fence designed to be installed on slopes. It can accommodate snow depths of up to 3.5 meters. Due to its continuous structure with wire mesh and wire netting stretched between the posts, there is no snow slipping through gaps between the bars, as seen in traditional avalanche prevention fences, nor is there any snow falling through the spaces between the fences. It effectively withstands the snow pressure within its designated area and reliably prevents avalanches. - Installed on slopes to suppress avalanche occurrence - Accommodates snow depths of up to 3.5 meters - No snow slipping through or falling out - Can be installed according to the terrain and surrounding environment Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-200001-A *For more details, please download the PDF or feel free to contact us.

• Road construction

The "Triangle Fence" is an avalanche prevention fence installed on slopes. It can accommodate snow depths of up to 5.0 meters. Additionally, it can also handle rockfall energy of up to 500 kJ as a rockfall protection fence. Conventional avalanche prevention fences use large concrete foundations, which can lead to larger foundations in soft ground, posing challenges in terms of construction and safety. The Triangle Fence is anchored to the ground, allowing it to be installed on relatively soft ground without the need for ground improvement. ■ Slope-installed avalanche prevention fence ■ Accommodates snow depths of up to 5.0 meters ■ Handles rockfall energy of up to 500 kJ ■ Over 290 successful installations nationwide Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) registration number: HR-020009-VE *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

"Tri-Pile" is an avalanche prevention stake installed on slopes to suppress snow glide. It is effective in preventing the occurrence of full-depth avalanches. The components are lightweight and have a very simple structure, making them easy to install. The heaviest component weighs about 15 to 20 kg, allowing for manual transportation and installation. Since a small-scale self-drilling anchor is used for the foundation, there is no need for large heavy machinery. This is expected to shorten construction time and reduce costs. ■ Slope-mounted avalanche prevention stake ■ Suppression of snow glide ■ Effective against full-depth avalanches Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: CG-120027-A *Registration period has ended *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Slope Guard Fence Type LS" is a vertical cantilever prevention, avalanche prevention, and avalanche protection fence primarily installed along roadsides or behind houses to prevent avalanche damage. It is designed considering slope snow pressure, load during snow, and avalanche impact force, making it suitable for both avalanche prevention works (cantilever prevention fences, avalanche prevention fences) and avalanche protection works (avalanche protection fences). ■ Avalanche measures for roadsides and behind houses ■ Vertical protective fence with a pile foundation structure ■ Effective for both avalanche prevention and avalanche protection Ministry of Land, Infrastructure, Transport and Tourism New Technology Information Provision System (NETIS) Registration Number: HR-100008-VR *Publication period has ended "Evaluation Promotion Technology (New Technology Utilization System Study Meeting (Ministry of Land, Infrastructure, Transport and Tourism))" *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

The "Snow Thru Guard" is a method that involves installing wire ropes between existing avalanche prevention fences to prevent snow from falling through the gaps between the fences. Traditionally, when snow fell through, a new avalanche prevention fence was installed above. Compared to conventional methods, the Snow Thru Guard can be installed at a lower cost, in a shorter time frame, and more easily. ■ Prevents snow from falling through the gaps between existing avalanche prevention fences ■ Easily reinforces existing fences by installing ropes *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

"Geo Snow Wall" is a reinforced soil wall designed to absorb avalanches by installing reinforced soil along roadsides. It can also be applied as a guiding retaining wall to direct avalanches along their path. Since the embankment is made of fill material, it has a flexible structure that can adapt to unexpected ground subsidence. Even when subjected to the impact force of an avalanche, there is no eccentric force acting on the installation ground, which means that large-scale foundation work or ground improvement is mostly unnecessary even in sites with poor ground conditions. ■ Reinforced soil wall efficiently absorbs avalanche impact ■ Soil structure with minimal impact on the supporting ground ■ Blends well with the landscape, creating no sense of pressure Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-990009-V *Registration period has ended As the 10-year registration period has elapsed, the listing on NETIS has ended. However, the registration number continues to exist. It is also a highly reliable construction method selected as a quasi-recommended technology in the fiscal year 2016 NETIS. *For more details, please download the PDF or feel free to contact us.

• Retaining wall
• Road construction
• Railway Construction

The "Slope Guard Net Type S" is a snow avalanche protection net that accumulates snow cornices that fall from collapsing snow or avalanche prevention fences on steep slopes into its pocket area, protecting roads and houses from snowfalls. In conventional snow collapse measures, when using concrete structures, it was necessary to excavate a large amount of the slope. The Slope Guard Net Type S has an anchor foundation structure, which requires less excavation of the slope, making it superior in terms of cost-effectiveness, constructability, and environmental impact. ■ Measures against collapsing snow and snow cornices near roads ■ Accumulating snow that spills from steep slopes into the pocket area Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: HR-190002-A *For more details, please download the PDF or feel free to contact us.

• Road construction
• Railway Construction
• Other civil engineering works

Urban Guard is suitable for debris flow and driftwood measures in non-flowing streams (small-scale streams). It is a construction method that excels in workability and contributes to shortening construction periods. The installation cost is low, and by performing stone removal and other maintenance after installation, it allows for repeated capture of debris flows and driftwood, thus keeping both initial and running costs down. It features a pile-type (pile foundation) structure, which minimizes changes to the riverbed ground and shortens the construction period. It is expected to be installed in sites requiring urgent safety measures with a short construction period. Additionally, it can be installed regardless of the foundation conditions or land acquisition in the upstream area since it does not use anchors in the upstream section. - Suitable for debris flow and driftwood measures in non-flowing streams (small-scale streams) - Pile-type (pile foundation) structure that achieves a small installation area and shortened construction period - Reduced initial installation costs, making it an economically advantageous measure - Capable of capturing repeated debris flows and driftwood - Adopts high-strength supports with excellent "ductility" function Ministry of Land, Infrastructure, Transport and Tourism New Technology Information System (NETIS) Registration Number: KT-210079-A Construction Technology Review Certificate: No. 1901 (General Incorporated Foundation, Sediment Disaster Prevention and Landslide Technology Center) *For more details, please download the PDF or feel free to contact us.

• Erosion control works

The "Korekkiri Screen" is a product that captures small stones, gravel, and driftwood that slip through the gaps between the steel pipes of a sluice gate by securing wire ropes in a screen-like configuration on the concrete sections of both banks of a transparent steel slit dam. The installation spacing of the wire ropes can be adjusted according to the designed gravel diameter. By fine-tuning the spacing to the optimal distance for the site, it reliably captures flowing gravel. ■ Measures against small to medium-sized stones and driftwood ■ Enhances the capturing function of steel slit sluice gates ■ Simple structure with wire ropes installed in a screen-like manner *For more details, please download the PDF or feel free to contact us.

• Erosion control works