Floating prevention method - List of Manufacturers, Suppliers, Companies and Products

Floating prevention method Product List

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Hat Ring Method for Suppressing Manhole Uplift during Earthquakes

Always non-weighted construction method! Since no special construction is performed, it can be completed easily and in a short time. [Looking for sales partners]

The "Hattling Method" involves installing buoyancy suppression blocks at a standard depth of 1.0m, utilizing the weight of the blocks and the weight of the backfill soil (crushed stone) on top of the blocks to suppress the uplift of manholes only when liquefaction occurs. This method can be applied not only to existing manholes in urban areas, which are significantly affected by uplift, but also to newly installed manholes. It can be constructed easily and at a low cost without affecting the manhole itself. 【Features】 ■ Can be installed on both existing and new manholes ■ Does not affect the manhole ■ No increase in inertial forces due to seismic motion ■ Can be constructed easily and in a short time *For more details, please refer to the PDF materials or feel free to contact us. 【Looking for Sales Partners】 We will sell your products! Can we support you in expanding your sales channels?

  • Renovation and repair methods

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Hat Ring Method for Suppressing Manhole Uplift during Earthquakes

Can be installed in both existing and new setups! A floating suppression method that does not affect the manhole during normal conditions.

The "Hattrling Method" is a technique that utilizes the weight of the blocks and the backfill soil on top of the blocks to suppress the uplift of manholes. This method can be applied not only to existing manholes in urban areas, which are significantly affected by uplift, but also to newly installed manholes. It does not create holes in the manhole or obstruct the internal cross-section, and it is designed to suppress uplift only when it is about to occur, so there is no constant load applied. 【Features】 ■ Can be installed on both existing and new manholes ■ Does not affect the manhole ■ No increase in inertial forces due to seismic motion ■ Easy installation and low cost ■ Obtained technical evaluation under the Japan Society of Civil Engineers' technical evaluation system *For more details, please refer to the PDF materials or feel free to contact us.

  • Manhole body
  • Ground foundation construction method
  • Earthquake-resistant construction method

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Safe Manhole VD Method for Suppressing Manhole Uplift Due to Liquefaction Phenomenon

Install the drain and secure the vibrator inside the manhole. By vibrating the manhole structure and compacting the surrounding ground, enhance the uplift resistance.

The Anshin Manhole VD Method is a technique that suppresses the floating of manholes caused by liquefaction phenomena through drainage and vibration functions. After installing a drain equipped with a filter and excess pore water pressure dissipation device at the low base of the manhole, a vibration machine is fixed inside the manhole to vibrate the manhole structure, thereby enhancing the resistance to floating by compacting the surrounding ground. 【Applications】 ● Seismic reinforcement of existing manholes 【Features】 ● Non-excavation: It is possible to drill from inside the manhole to the bottom without drawing in groundwater or soil, allowing for the installation of filters. ● Maintenance-free: By drawing water from the bottom of the manhole against the buoyancy generated by liquefaction, it efficiently suppresses excess pore water pressure. ● It is safe as it is maintenance-free even if excess pore water pressure occurs due to aftershocks. ● Ground improvement through vibration: By vibrating the manhole body and compacting the surrounding ground, ground improvement is achieved.

  • Sewerage facilities

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