I went to a construction site tour of the Shitara Dam's diversion works, and I am ashamed to say that I learned of the tour through a blog post by a friend of mine, which was shared on Facebook by a person from my company.
The Shitara Dam construction site, which I had been planning to visit someday but had not been able to do so for a long time. Seeing this as an opportunity, I made a reservation.
Former Toyohashi Railway Taguchi Line Hirano Bridge
Since we had some time before the meeting time, we decided to see the remains of the Taguchi Line while on location, so we headed for the meeting place from the road at the Taguchi Line site instead of the national highway.
A certain tunnel on the former Toyohashi Railway Taguchi Line
It is quite a tasteful tunnel. Just to be sure, I stopped to take pictures while making sure no one was coming. It would be a shame to lose these remains of the Taguchi Line, but I am sure that this area will be preserved since it is downstream except upstream from the levee area.
Parking lot behind Shitara Town Hall, the meeting place
After enjoying the Taguchi Line and completing location scouting, we arrived at the parking lot behind the Shitara Town Hall where we were to meet. The office of Tobishima Corporation, which is now in charge of the construction of the turnaround construction, was also set up. Shitara Town Hall had been newly renovated. My car navigation system showed the old location.
Shitara Dam card commemorating the 30th anniversary of the Emperor's accession to the throne, stones and pamphlets of the diversion works
In addition to the pamphlet, the 30th Anniversary of His Majesty the Emperor's Enthronement Commemorative Shitara, which has been distributed for a limited time starting todaydam cardIn addition, stones mined in the diversion works were given to us as souvenirs.
Waste rock aggregate transportation route
The photo was taken during location scouting, and the road is used to transport excavated material to bedrock at the dam site to a disposal site. It is bony and cool.
Imagine a levee
This is another photo from the location tour, and this is where the explanation was given. If you proceed along the road on the left side of the photo, you will find a tunnel, and the photo is looking downstream. A little further downstream isdam axis(like the center line of a levee). In other words, the levee on the downstream side will appear right in front of you. And this is exactly the area that will be submerged.
Around the mouth of the diversion works
He said that the drinking mouth of the diversion works will come to the right of the bus, further to the right of the waffle-shaped concrete. (It is a secret that I realized at this point that I had mistakenly assumed that the diversion works were already open.)
Explained at the outlet of the diversion engineer.
From the drinking mouth to the spitting mouth, you can go on foot. It is a good way to explore the Taguchi line. By the way, there are 20 participants and most of them are locals. For the time being, locals will have priority, and non-locals can join if there are enough seats available.
Discharge outlet of the diversion works
This is the outlet of the diversion works. Now it is time to go inside. The thick duct-like thing on top is a duct for airflow, and the blue thing on the upper left is a blower.
Inside of converter
The length of the tunnel is 422 m. It looks like entering from the outlet and returning from the inside to the mouth. The tunnel is roughly sprayed now, but once the tunnel is penetrated, waterproofing and concrete lining will be constructed.
of the diversion works.face (of a wall of coal or ore, etc.)
We have come to the cutting edge. They are going to cut just a little more to penetrate. The concrete is neatly constructed with shotcrete, but since there is a town road (the old Taguchi line) on the other side, they are trying to keep it from collapsing for safety reasons. Also, if there was no town road, they would not have sprayed this much concrete.
I got the impression that Tobishima Construction was confident in their attention to safety. This is the work of a professional.
Visitors looking at the face of the diversion works
Here, everyone asked questions, took commemorative photos, and enjoyed themselves.
summary
Most of the visitors to this tour were local residents, but I was impressed by the many questions flying around. I also asked questions about the specific location of the dam axis and how it is transported from the aggregate plant.
They are thinking of trucking the aggregate instead of conveyor belts for now. I had thought that conveyor belts were the mainstream, but this was a surprise. Well, I guess it is the result of estimating which would be less expensive.
Also, they are giving priority to local residents for this tour, but in the future they are thinking of offering tours to the general public as well. I appealed to them, saying, "Please do! I appealed to him.
Also, I heard that the Taguchi Line will be completely closed to traffic when the main construction work begins (as a matter of course), but it seems that they are thinking of some way to allow the general public to casually visit the embankment under construction.
I guess they are aware of the Yamba Dam because it is so impressive. However, unlike the Yamba Dam located along the national highway, the Shitara Dam is built in a valley on the opposite side of a peak from the national highway, so I felt that it would be quite difficult. But even here, I appealed to them, "Please do it! I appealed to them.
and although I visited Shitara Dam for the first time just as construction began in earnest (I visited several times during the survey period), I wanted to continue to visit the dam and watch it grow, if possible.
Comment