The definitive method for preventing manhole floatation! Includes examples of the inner weight method construction!
This document introduces the "Inner Weight Method" to prevent the phenomenon of manhole uplift caused by liquefaction. It includes information on damages caused by manhole uplift, as well as the evaluation and characteristics of method selection and weight-increasing methods. 【Contents (partial)】 ■ Damages caused by manhole uplift ■ Mechanism of manhole uplift ■ Diagnosis of manhole uplift ■ Method selection (Part 1 to Part 3) ■ Evaluation of weight-increasing methods *For more details, please refer to the PDF document or feel free to contact us.
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**Method Selection** ■ Pore Water Pressure Dissipation Method - Dissipate excessive pore water pressure around the manhole using drains, and suppress buoyancy with shear resistance from the sidewall. ■ Anchor Method - Install anchors into the fixed layer to resist buoyant forces during liquefaction, physically restraining buoyancy. ■ Weighting Method - Place weights on the manhole to equalize its apparent specific gravity with that of the surrounding ground, resisting buoyancy. *For more details, please refer to the PDF document or feel free to contact us.*
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For more details, please refer to the PDF document or feel free to contact us.
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Fukuhara Casting Co., Ltd. handles FCD cast iron, ordinary cast iron, sewer manhole covers, fire protection water tank covers, and methods for preventing manhole floatation, among other products. We are committed to developing products and technologies that are ahead of their time. Please feel free to contact us if you have any inquiries.