By predicting degradation based on the inspection result, preventive maintenance is ensured at an appropriate time to achieve long service life and minimize life cycle cost, and repair damages and deal with defects at an early stage based on inspection results.
- Examples of preventative maintenance works
Countermeasure against carbonation of bridge side concrete walls
Waterproofing of concrete deck
- Examples of corrective maintenance works
Replacement of expansion joint
Concrete crack repairing work
On the pavement of the main road, it is necessary to accurately grasp the required repair spots based on the results of the road surface property survey conducted approximately every three years and the pavement deterioration prediction, to formulate an efficient repair plan, We are carrying out repair work to secure 95% or more.
Maintained pavement ratio
- Calculation method
Dividing the length of maintained traffic lanes by the total length of traffic lanes.
Maintained traffic lane : Fine pavement conditions that road users perceive as comfortable (rutting<25mm, cracking ratio <20%, surface smoothness (IRI) <3.5mm/200m)
- Calculation formula
Maintained pavement ratio (%) = (LP ? Lpa) / LP × 100
LP: Total length of traffic lanes (1st/2nd lanes, passing lane, slow traffic lane)
Lpa: The lane length judged as needing repair based on road surface condition survey results and deterioration prediction.
Pavement repair work
