Top Contents Map Japanese

Establishment and progress of the airport
History of the Kansai International Airport
Environment chronology
Outline diagram for the efforts in regard to the environment

Environment considerations with the second phase
Creation of an abundant environment
Monitoring of the influence onto the environment
Environment preservation measures during the construction work
Together with the people in the surrounding area
Environment influence evaluation




Environment considerations with the second phase


Environment preservation measures during the construction work



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Efforts are made to minimize negative environmental impact of the work.Efforts are made for efficient use of resources,prevention of waste, energy savings, raised consciousness in regard to environment considerations by the concerned persons, etc.

Concrete measure

Installation and efficient use of silt protection sheets
In order to prevent spreading of turbidity of the sea water from the introduction of soil to the surrounding areas with the start of work for construction of the second airport island, two types of silt protection sheets, a suspended type and a selfstanding type,had been installed over nearly the entire circumference.
In November 2001, the seawall surrounding the airport island, except for the opening for ships to enter and leave, was almost completed.Together with this, the no longer required contamination prevention membranes were redeployed to sheets for prevention of outflow of earth and sand from the inside of the seawall with the changing tides, and the concrete blocks (anchor blocks) used to fix the contamination prevention membranes were redeployed as blocks for the upper part of the seawall.A total of 716 blocks were redeployed, accounting for 22% of the approximately 3300 upper blocks to be installed.






Installation condition for (self-standing) sheets for prevention of outflow of earth and sand


Plan view of silt protection sheets installation





Redeployment of sheets for prevention of outflow of earth and sand


Sectional view of silt protection sheets installation (image)




Self standing type : 8.1 km out of 11.4 km removed
Suspended type : 7.0 km out of 10.2 km removed
Anchor blocks : 716 out of 1,052 removed




Redeployment of anchor blocks as blocks for the upper part

Quality control for mountain soil
The quality of the mountain soil used for the work was decided as having a content of less than 20% of silt (grain size:0.075 mm or less), which floats up easily when the soil is poured into the sea,and not to use sand not meeting this standard.
The quality of the mountain soil is managed by installing sand grain size testers (JIS A1204) at each soil collection site and checking the content of silt and smaller grains.At the work site,the contractors take samples once a day from each ship separate by collection site on board before entry into the work area and confirm the content of silt and finer particles with measuring cylinders (washing test).
The mountain soil presently used has a silt content of around 10%, and no mountain soil not meeting the standard has been found.


Measures against air pollution,noise, and vibrations

Use of construction machines with exhaust gas countermeasures
The contractors have the duty to use construction machines with exhaust gas countermeasures (*1), or when use of such machines is not possible, to use construction machines equipped with suitable exhaust gas purification devices (*2).

(*1)
Machines specified according to the 'Outline specifications for construction machines with exhaust gas countermeasures (issue No.249 by the Construction Ministry on October 8, 1991, final revision No.126 by the Construction Ministry on October 3,1997).
(*2)
Purification device evaluated by the civil engineering technology inspection and certification agency according to the "Development of exhaust purification devices for construction machines"as published by the Ministry of Land, Infrastructure and Transport or similar development targets in 1995.

Use of fuel of good quality
As an exhaust gas countermeasure for the ships and construction machines used for the work,efforts are made for reduced fuel consumption by efficient use.
Instructions are given to the contractors to use fuel of good quality (grade A heavy fuel oil, light fuel oil, etc.) for the ships,machines,etc.used for the work.


Operation management for the work-related vehicles
For the transport of materials for manufacture of caissons and wave-eliminating blocks on the opposite shore, efforts are made to reduce the influence of air pollution, noise, vibrations, etc.in the coastal region.

Reuse of soil generated by the construction

Maintenance work for the first phase airport island still continues, and the earth resulting from this work is reused for the second airport island.




Work machines and vehicles
The work vehicles sufficiently satisfy the exhaust gas regulations.




Mark for standard exhaust gas emissions



Loading gravel onto a gravel barge
Exhaust gas measuring for a work ship

In order to grasp the exhaust condition for air pollutants by the ships engaged in the work, exhaust gas measuring was performed.

Workers training

Training in regard to the items required for implementation of work activities under consideration of the environment is being performed periodically for all workers engaged in the construction work for the second airport island and for the representatives of the subcontractors.

Investigation of planting for filled-up land Blowing the seeds

An investigation of planting was performed for the filled-up land of the second airport island as a step towards imple-mentation of the plating in the vicinity of the runway and the taxiways of the second airport island.Seeds for grass etc. (Italian grass,alfalfa,etc.) were blown onto different kinds of soil,and the growth characteristics, the implementation characteristics, the economy, etc.were being investigated.



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