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1.4.5 Maintenances

KIOSK collects and organizes basic technologies from all fields that contribute to Maintenance.

For maintaining roads, it is important to monitor the changes quantitatively that have occurred not only in the road itself, but also in the surrounding ground and slopes.

Monitoring data will be essential for establishing the proper maintenance planning.

In addition, it is necessary to have a warning system such as for traffic restriction in case of emergency.

For this purpose, monitoring technology is important, and many monitoring methods are described in the content here.

Figure 1.4.5 Example of road surface monitor

Figure 1.4.5 Example of road surface monitor

1.4.5.1 Road Surface and Roadbed

Since, the total length of the road is long, road maintenance is generally expensive and time-consuming matters. Because of the limited budget for maintenance, it is essential to identify severely damaged areas of the road to determine the priority zone for the maintenance when making the maintenance plan.

For evaluating the road surface and roadbed condition various inspection and diagnosing techniques have been developed.

As the inspections and diagnoses are carried out regularly, acquired data should be accumulated in a database or cloud-based data storage system. This is important for maintenance for the long term.

KIOSK technologies

  • 1.4.5.1.1 The cloud service that uses smartphones to support daily and disaster management and inspection of roads
  • 1.4.5.1.2 Non-destructive detection technology for underground cavities and buried objects (Under-road inspection for infrastructure maintenance by using ground-penetrating radar)

1.4.5.2 Bridge

The bridge consists mainly of iron and concrete. In the case of bridges where those are constructed along coastal areas, it is necessary to take into account chemical erosion of the materials due to chloride damage.

By observing the presence of cracks on the bridge structure, chemical analysis of the material, stresses which apply on the structure, etc. the bridge can be quantitatively assessed.

Recently BIM is utilized for construction works, these data are expected to be reflected in BIM. Then the maintenance planning and works would be performed effectively.

KIOSK technologies

  • 1.4.5.2.1 RC bridge salt damage evaluation system using the fluorescence X-rays analyzing technique
  • 1.4.5.2.2 High Capacity Micro Pile: Embedded piles and embedded piles with a pile diameter of 300 mm or less that can be used for reinforcing the foundations of various structures
  • 1.4.5.2.3 Three dimensional model construction method for the bridge maintenance
  • 1.4.5.2.4 Shear strengthening method capable of constructing from inside of underground structures
  • 1.4.5.2.5 Seismic retrofit method for high-speed construction in narrow space
  • 1.4.5.2.6 Technology for image analysis of concrete cracks caused by earthquakes
  • 1.4.5.2.7 Technology for constructing infrastructure facilities utilizing the merits of ultra-high strength fiber-reinforced concrete, Robust bridge resistant to disasters

1.4.5.3 Road Tunnel

Tunnel is mainly constructed in mountainous area and underground in urbanized areas. Since, the surrounding geology varies from hard rock to soft soil, the design of the tunnel is varied.

But in any case, a tunnel should have enough strength against underground pressure or dynamic forces caused by earthquakes.

In addition, in case of fire caused by a traffic accident, fireproof measures should also be considered.

KIOSK technologies

  • 1.4.5.3.1 Fireproof segment effective for disaster prevention in shield tunnel
  • 1.4.5.3.2 High performance sprayed concrete resilient for disasters

1.4.5.4 Slope Measures

Slope measures aim to stabilize the slope itself to prevent the failure of the slope. To achieve this, monitoring is quite essential to grasp the condition of the slope.

Many monitoring technologies could be applied for slope. Since the observed area is wide, a huge volume of the observed data should be interpreted in real time. The interpretation using AI technologies would be next generation techniques for the future.

KIOSK technologies

  • 1.4.5.4.1 Earthwork structure inspection system using the PS-In-SAR technique
  • 1.4.5.4.2 Landslide terrain interpretation technology by AI
  • 1.4.5.4.3 Slope monitoring service using remote sensing technology
  • 1.4.5.4.4 Cloud-based slope and road structure measurement and monitoring service using WEB-GIS
  • 1.4.5.4.5 Early warning monitoring technology of slope failure using tilt sensors array and volumetric water contents
  • 1.4.5.4.6 Microseism and vibration sensor array monitoring technology

1.4.5.5 Road Structure

Since, the total length of the road is long, road maintenance is generally expensive and time-consuming matters. Because of the limited budget for maintenance, it is important to identify the location and condition of the road structure where it is severely damaged.

For evaluating the road structure, inspection and diagnosing techniques have been developed.

These techniques are effective for maintenance work for the long term.

KIOSK technologies

  • 1.4.5.5.1 Early warning monitoring technology of slope failure using tilt sensors array and volumetric water contents
  • 1.4.5.5.2 Microseism and vibration sensor array monitoring technology

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