Urban Guard: Pile-type (Pile Foundation) Debris Flow and Driftwood Countermeasure Works for Non-Flowing Streams
"Urban Guard" for non-flowing streams (small-scale streams) with pile-type (pile foundation) measures against debris flows and driftwood.
Obtained "Construction Technology Review Certification." A pile structure that achieves a small installation area and shortened construction period. Initial installation costs are reduced, making it an economically advantageous countermeasure.
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.
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basic information
The urban guard is mainly composed of support pillars, wire rope nets, and wire nets. It catches the flowing debris flow with the support pillars and wire rope nets arranged in the permeable section. Wire nets for preventing outflow are also placed in the gaps, and they are anchored on both banks. For the support members, a hollow structure steel pipe (LST steel pipe) is adopted, which bundles small-diameter steel pipes inside an external steel pipe and fills the gaps between the steel pipes with mortar. It has high strength and excellent "ductility function." *For inquiries or questions regarding products and technologies, please feel free to contact us.*
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Detailed information
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"Obtained Construction Technology Examination Certification" Urban Guard has obtained the "Construction Technology Examination Certification" from the Public Interest Incorporated Foundation, Sediment Disaster Prevention and Landslide Technology Center. It has been proven that Urban Guard is effective as a countermeasure against debris flows and driftwood in non-flowing streams (small-scale streams).
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【Piling Foundation Structure Pillar】 Since the pillar foundation is a piling foundation structure, there is minimal alteration to the riverbed's ground, which can shorten the construction period. In sites requiring urgent safety measures, installation within a short timeframe is expected. Additionally, since no anchors are used in the upstream area, installation is possible regardless of the foundation conditions or land acquisition in the upstream area.
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"Adopting high-strength support columns with excellent 'ductility function (toughness)'" For the support members, a hollow structure steel pipe (LST pipe) with a lotus root shape is used, which bundles small-diameter steel pipes arranged within an external steel pipe and fills the gaps between the steel pipes with mortar. It is high-strength and excels in 'ductility function (toughness).'
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"Wire rope net with grid width tailored to the site" The wire rope net designed to capture debris flows and driftwood is processed into a grid shape by connecting multiple wire ropes both vertically and horizontally. The grid width can be set according to the site conditions. Connection components are used to prevent the grid width from expanding. Additionally, wear-resistant materials are installed at the top and bottom of the wire rope net.
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Protech Engineering is a manufacturer of natural disaster prevention products, developing protective fences and walls against falling rocks, avalanches, and landslides, with over 3,000 sales achievements across Japan. As a new business area, we are also working on the development of products for debris flows and driftwood countermeasures. With the motto of contributing to society through innovation in natural disaster prevention technology, we have established a consistent production system that encompasses everything from development and proposals to design, manufacturing, and construction, and we are committed to tackling disaster prevention challenges.