Non-destructive inspection, such as to find
a crack in the steel structure using the inspection work and ultrasound of the
real bridge by workers wear reflective
vest.
Metropolitan (Metropolitan Expressway) is, more of the promotion of
disaster prevention activities of Metropolitan employees and group company
employees, and for the purpose of improving the awareness of safety, June 17
from May 17 (Tue) (gold) has been implementing the "metropolitan safety
month" up to, but was carried out "metropolitan inspection and repair
demo 2016" to the university students of civil engineering such as
Department of the Tokyo metropolitan area for the next generation.
This is such an event that has been implemented since 2008,
"was able to experience the technology that was heard in the
classroom", "the future we want to contribute to the industry",
that of the well-received by participating students. 39 people to match the
current participation are men and women. Such as non-destructive testing, the
manner in which students are to visit and experience the "technology of
the safety and security" press to discover the crack of steel structures
using the inspection work and ultrasound of the real bridge using aerial work
platforms even so was published towards, reports its pattern.
Demonstration in the "Tatsumi repair base," which is
located under the Metropolitan Wangan overpass that was done, was also prepared
demo of "proximity inspection" using the aerial work platforms.
Although it is a vehicle which is a large-sized work platform called the
"super deck", and boom boarded the Aerial gondola (arm-like portion
that supports the gondola that extends to reach the altitude) is going to
stretch, tension we saw also the participants to show the facial expression.
Although there is a height of a few m from the ground, it seems to remember the
embarrassment to the inexperience of the state.
A type of non-destructive inspection method
of the so-called material, and is capable of finding cracks (openings defect)
such as iron and steel materials. The demo magnetized by using the electrode in
steel, but it was how to visually against the ultraviolet light after you spray
the test solution, it was possible to confirm the streaky crack shines clearly
in green.
Similarly, is a kind of non-destructive inspection method of
substance, the demonstration also tour of the "ultrasonic flaw detection
test" to check the internal defects in the welds? As difficult commentary
get search on the Web site, from easy to say when the transmitter to transmit
the ultrasonic pulse, to display the ultrasound that is reflected in the
internal defects on the screen of the receiver, the failure of the location and
size thing of the inspection method to confirm.
As a semi-automatic testing equipment demonstrations and the deck
plate direction in depth more than 6mm of dangerous cracks that are in addition
to, also referred to as "steel floor plate SAUT",
"electromagnetic radar method" to explore the steel material, such as
rebar to be present in the concrete, the concrete Slapping, such as the
description of the "rebound degree method" to estimate the
compressive strength from the rebound degree, was listening with a serious look
is attendees.
After a tour of the capital sales in the inspection and repair
methods, for accuracy check of the axis of the tollgate heavy equipment, it can
test up to 8 to 16 tons by moving back and forth the weight of KaSobu
"axle load test car ", as can be confirmed work even without the
entire surface closed to traffic, the water spray head surrounded by a bucket
or" water spray inspection vehicles ", the exhibition of the
inspection test vehicle, such as" ETC for the electric field strength
measurement car "commentary the received, was able to understand the
respective roles and needs.
Unfortunately, although the actual vehicle was not, yellow vehicle
with reflective
tape called "infrastructure Doctor" that can be inspected the
road while running in the same manner as "Doctor Yellow" What was
interesting is the bullet train. Metropolitan technology, Asahi three companies
of Aero has developed, GIS (geographic information system) and MMS by linking
such as a three-dimensional point cloud data and videos measured by the
(surveying system by a mobile measurement vehicle), road you can check the
status of and structures on the screen, which is capable of and automatically
create the necessary drawings from point cloud data, that of a system that
supports the operation and maintenance of roads and structures.
Technical content, but I want to browse the Web, the capital of
high-speed technology, because the infrastructure Doctor is a data such as
roads and structures while traveling as well as the general cars can be
acquired, even such as the causative road traffic regulation of traffic
congestion unnecessary. The 3D of the road structure is that of the world's
first technology, the detection of the aging of the road structures, it is the
going to utilize, such as maintenance and repair.
At the time of inspection work of day-to-day, there is a exhibition
also explained the actual equipment and clothing, such as the equipment could
also try to pick up. Inspection hammer and percussion bar, scale, feeler gauge,
measuring tools, such as crack scale, has a such as anti spray and dustpan, a
helmet, of course, head lights, protective goggles, dust mask, of reflective
material safety vest, gloves , knee addressed, such as safety shoes,
description has been for each of the need.
Civil protection director of the Metropolitan Expressway Tokyo was
greeted at the time of the demonstration ended, and listen to the story,
"By providing such opportunities, students with an interest in current
technology and work got, I'm glad After me learn a lot more of it.
