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 component 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 that correspond to the sectional forces, the thickness of the components is minimized. *For more details, please download the materials or contact us through our website.
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basic information
【Design Conditions】 Soil Cover: 0.2m to 2.0m Dead Load Unit Volume Mass of Reinforced Concrete: 24.5 kN/m³ Unit Volume Mass of Soil: 18.0 kN/m³ Unit Volume Mass 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 considerations can be made outside the above design conditions. *If the inside of the box contains a roadway, sidewalk, and high external water level, water stop measures need to be considered.
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Applications/Examples of results
Examples of Use - Small-scale bridges - Underpasses - Protection of lifelines, etc. (compatible with portal shapes) - Underground passages - 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 the top plate
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Installation 1 on the framework of each component of the top plate.
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Installation 2 on the framework 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.
Company information
Our company, under the belief of contributing to society through the development of social infrastructure, constantly strives for quality improvement and technical advancement. With the conviction that business is about people, we respect humanity, engage in talent development and fair personnel practices, and cultivate a free and open corporate culture. We aim to deepen mutual understanding and trust, working together towards the development of the company and the enhancement of welfare, while concentrating all our efforts on stabilizing and expanding our management foundation.
