Super wide box with a top plate divided, inner width 15m.
By splitting and transporting the top materials and assembling them on-site, an interior width exceeding super wide has been achieved.
The "Top Slab Split Super Wide Box" features a structure that divides the top slab components into three parts, allowing for a box culvert with an internal width of 15 meters. To integrate the divided top slab components, PC steel materials are arranged using technology adapted from segmental girder bridges. By effectively introducing prestress with the arrangement of PC steel materials corresponding to the sectional forces, the thickness of the components is minimized. *For more details, please download the materials or contact us through our website.
basic information
【Design Conditions】 Soil Cover: 0.2m to 2.0m Dead Load Unit Weight of Reinforced Concrete: 24.5 kN/m³ Unit Weight of Soil: 18.0 kN/m³ Unit Weight of Asphalt: 22.5 kN/m³ Live Load (Road Crossing): T-25t Horizontal Earth Pressure Coefficient: 0.50 Groundwater Level: Not considered Applicable Ground: Generally, good ground of ordinary ground or better. Allowable Tensile Stress of Reinforcement: 180 N/mm² Side Wall Joint Method: Joint using PC steel bars Concrete Design Standard Strength: Top Slab Member: 50 N/mm² Side Wall Member: 40 N/mm² Bottom Slab Member: 30 N/mm² (cast in two locations) *Separate consideration is possible even outside the above design conditions. *If the inside of the box includes a roadway, sidewalk, and the external water level is high, water stop measures need to be considered.
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Applications/Examples of results
Examples of Use 〇 Small-scale bridges 〇 Underpasses 〇 Protection of lifelines, etc. (compatible with portal shapes) 〇 Underground passages 〇 Underground storage tanks, etc. For examples of achievements, we will respond to specific inquiries.
Detailed information
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Assembly procedure for the top plate Assembly of the frame for top plate assembly
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Installation 1 on the framework of each component of the top plate.
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Installation 2 on the frame of each component of the top plate.
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PC steel insertion
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PC steel tension
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After tightening, install the grout cap.
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Installation of the top plate
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