Author Topic: Why are Tunnels Round?  (Read 22296 times)

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t_hunter44

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Re: Why are Tunnels Round?
« Reply #60 on: May 14, 2012, 03:31:12 PM »
is it true that blasting the entrance of a tunnel locked in pressure to keep the sides intact, and once closed tunnel is opened, in a few days, it begins to collapse?
     That is FALSE. Earthen Tunnels is what we will encounter in this quest and earth is POROUS, Air and Water will pass through it so there is No way that anyone can Pressurize and hold that pressure on an earthen tunnel and if it does, then it defies logic.

Offline lindsay

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Re: Why are Tunnels Round?
« Reply #61 on: May 16, 2012, 10:19:52 AM »
is it true that blasting the entrance of a tunnel locked in pressure to keep the sides intact, and once closed tunnel is opened, in a few days, it begins to collapse?
No you don't have to blast the entrance. just in our site here, we encounter a closed tunnel, in the entrance we found a diagram stone which is the same form with the tunnel. the openings are in both sides and at the back. But the our operation was stopped due to our diggers having nightmares. they said that there's a tall man wants to kill them. two of my diggers almost the same story about their nightmares.

DINDO BAYAUA

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Re: Why are Tunnels Round?
« Reply #62 on: May 16, 2012, 10:45:35 AM »
Quote
But the our operation was stopped due to our diggers having nightmares. they said that there's a tall man wants to kill them. two of my diggers almost the same story about their nightmares.

What does that tall man wants to convey?

Offline lindsay

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Re: Why are Tunnels Round?
« Reply #63 on: May 16, 2012, 11:56:21 AM »
Quote
But the our operation was stopped due to our diggers having nightmares. they said that there's a tall man wants to kill them. two of my diggers almost the same story about their nightmares.

What does that tall man wants to convey?

we don't know Sir what he wants to convey. My diggers just said that he will choke them until they roused and his face is so angry. according to my lolo and other old neighbors here, the Japanese killed the three brothers who lived near to the place where we noticed the tunnel. I think he's one of the three brothers that was killed.

t_hunter44

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Re: Why are Tunnels Round?
« Reply #64 on: May 16, 2012, 12:34:53 PM »
is it true that blasting the entrance of a tunnel locked in pressure to keep the sides intact, and once closed tunnel is opened, in a few days, it begins to collapse?
No you don't have to blast the entrance. just in our site here, we encounter a closed tunnel, in the entrance we found a diagram stone which is the same form with the tunnel. the openings are in both sides and at the back. But the our operation was stopped due to our diggers having nightmares. they said that there's a tall man wants to kill them. two of my diggers almost the same story about their nightmares.
Atan, read the post of Kaloy again. What he was saying, when the Japanese Sealed off the Tunnel by Blasting the entrance, the pressure resulting from the Blast was sealed inside the tunnel when the tunnel entrance  collapsed and thereby sealing the entrance. When the tunnel was opened, the tunnel, he says, begins to collapse after a few days because he thinks the pressure inside the tunnel was released after the entrance was opened. My answer was NO as the tunnel is normally earthen material and earth is porous, meaning it will not stop or seal in Water nor Air. Hopefully my explanation clarified the matter.

Offline KIZUNA

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Japanese secret tunnels, tunneling marvels revealed!!!
« Reply #65 on: September 16, 2012, 03:10:03 PM »
T hunters view this video and if your keen enough, you can gather some nice ideas that can help you analyze though your conquest....

Cities of the Underworld - Bomb Underground

http://www.youtube.com/watch?v=LGgn8d
Light travels faster than sound. This is why some people appear bright until you hear them speak.

KZN

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Re: Japanese secret tunnels, tunneling marvels revealed!!!
« Reply #66 on: September 17, 2012, 12:55:06 AM »
T hunters view this video and if your keen enough, you can gather some nice ideas that can help you analyze though your conquest....

Cities of the Underworld - Bomb Underground

http://www.youtube.com/watch?v=LGgn8d

It says; THIS VIDEO DOES NOT EXIST.
TW

Offline KIZUNA

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Re: Japanese secret tunnels, tunneling marvels revealed!!!
« Reply #67 on: September 17, 2012, 07:26:47 AM »
ah uhmm let me correct that admin,
how about this....


http://www.youtube.com/watch?v=LGgn8d58dRc
Light travels faster than sound. This is why some people appear bright until you hear them speak.

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Offline Ben Valmores

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Re: Why are Tunnels Round?//sample video, world war two IJA spider holes
« Reply #68 on: December 19, 2012, 04:19:43 PM »
sample video, world war two IJA spider holes

http://www.youtube.com/watch?v=kjLtlV61cuY

This is a short video depicting IJA spider holes.

Longer version of the video can be accessed on my facebook account but only for friends.

There's some unfriendly forces here, always monitoring my moves.
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
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Offline Ben Valmores

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Re: Why are Tunnels Round?/video depicting IJA spider holes
« Reply #69 on: December 23, 2012, 09:56:24 AM »
video depicting IJA spider holes

http://www.youtube.com/watch?v=pEFTfJfSCO8
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
---William Jennings Bryan

Offline Ben Valmores

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Re: Why are Tunnels Round?
« Reply #70 on: December 23, 2012, 11:47:45 AM »
The video shows authentic Imperial Japanese Army Spider Holes during ww2.
A Spider Hole is a type of Foxhole that can be used for observation or ambush. To make a Spider Hole one must dig out a large hole and covers it with foliage and materials found nearby, leaving only a small observation slit.

Some Spider Holes were connected to tunnel systems.

The name Spider Hole comes from the Trapdoor Spider which waits in a small hole covered with leaves and springs into action to catch prey when it crawls nearby.
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
---William Jennings Bryan

Offline Ben Valmores

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Re: Why are Tunnels Round?///
« Reply #71 on: March 27, 2013, 11:55:20 AM »

Matsushiro Underground Imperial Headquarters

The Matsushiro Underground Imperial Headquarters (松代大本営跡 Matsushiro Daihon'ei Ato?, lit.

Matsushiro Imperial Headquarters Site) was a large underground bunker complex built during the Second World War in the Matsushiro suburb of Nagano, Japan. The facility was constructed so that the central organs of government of Imperial Japan could be transferred there. In its construction, three mountains, symbolic of Matsushiro Municipality were damaged.

Parts of the caves are open to the public today, and are operated as a tourist attraction by Nagano.

Construction

Construction began on November 11, 1942 and continued until Japan's surrender on August 15, 1945. Construction was 75% completed at the end of the war, with 5,856.6 square meters (63,040 sq ft) of floor-space (59,635 cubic meters (2,106,000 cu ft) of volume) excavated.

Between 7,000 and 10,000 Korean slave laborers were used to build the complex, and it is estimated that 1,500 of them died.[3] Forty-six Koreans disappeared on August 15, 1945, when Japan surrendered. The project cost ¥200,000,000.

Composition
 
A diagram of the complex
The complex was an interlinked series of tunnels underneath several mountains. Facilities for theImperial General Headquarters and palace functions were constructed under Mount Maizuru; military communications under Mount Saijo; government agencies, NHK and central telephone facilities under Mount Zōzan; the residences of the imperial family under Mount Minakami, and the Imperial Sanctuary under Mount Kobo.

Purpose

The original purpose of the complex was to serve as an alternative headquarters for the Imperial General headquarters. However, in March 1945, secret orders were issued to add a palace to the complex. Yoshijirō Umezu informed Emperor Hirohito about construction of the complex in May, but did not tell him that it contained a palace.

The plan was to relocate the Emperor to the complex in an armored train. When informed about the existence of the palace in July, Hirohito twice refused to relocate. It has been suggested that he refused because going to Matsushiro would have effectively isolated the Emperor and allowed the army to rule in his name, effectively guaranteeing they would pursue the war to "suicidal extremes".

The complex was designed specifically to withstand B-29 bombings.
Before the war, the Imperial Army's prevalent thinking was that Tokyo, close to the shore and on the rim of the Kanto Plains was indefensible. Therefore, in the scenario of a fight on Japanese soil, they planned to have the vital organs of government shifted inland. When Saipan fell in July 1944, the bombing of Japan and the final battle in Japan became a real problem. In the same month, by a decision made at Tojo's last cabinet meeting, approval was given to transfer the palace, the army headquarters and other important governmental organs to Matsushiro.

Construction
In the initial plan, the government, NHK and the telephone bureau was planned for the Zouzan tunnel. The Minakamiyama tunnel was intended to house the Imperial Palace and the general staff. However, the soil beneath Minakamiyama could not support such a scheme and the plan was changed to shift the palace and the general staff to Mount Maizuru tunnel. On Mount Maizuru, a concrete building was constructed externally and the Minakamiyama tunnel was made into a storage facility. The combined length of the three shelters exceed 10 km.
The army bought the land through government agencies. Silkworm keeping was prized then; the acquisition of mulberry fields was therefore made at three different prices according to the productivity of the lands. The land deemed useless after the war, saw its land value drop to half of the price with which it was acquired. 130 of 500 so families were evacuated for the construction; it was directed by the Eastern Command of the Imperial Army. Agriculture itself was allowed, so farmers and their dependents stayed at relatives' houses nearby. To conceal the extent of the evacuation, the houses of evacuated families were left as they were and the families were allowed to leave with only three tatami mats. After the war, on the 9 November, some returned to their houses and started repairs.

The first explosion was made on 11 November 1944 and work commenced thereafter. Dynamite was used and the debris was removed primarily via human labour. In total, 7000 Koreans and 3000 Japanese worked three eight-hour shifts, later two twelve-hour shifts on the site. Asides from the above, another estimated 120,000 workers from Nishimatsu Company, 79,600 labour volunteers, 157,000 subcontractors from Nishimatsu and Kajima company, 254,000 Korean labourers were involved in the project. However, at 75% completion, work was halted on 15 August due to the surrender.

Imperial Shrine

There was in place a plan to move the Imperial Regalia of Japan of the Imperial Sanctuary from Tokyo to Matsushiro. Initially, the replacement shrine was planned in the Maizuru tunnels. However the Imperial Household Agency strongly insisted[citation needed]: "Even some unfortunate mishap should befall his Majesty, the three artefacts (of the regalia) are inviolable. We will not allow it to be stored in the same place as the residence. His majesty's residence should be built to face south, forming a straight axis as the Shrine of Ise, and that should be performed by Japanese of pure blood."

However, the unit in charge of the shrine had no idea how to build one. Tokyo University engineering professor Private First Class Sekino Katsukazu was put in charge. The headquarters asked for the advice of several other professors. At the instruction of one, the tunnels split into lightning forms, reducing the impact from the bombs. The "Japanese of pure blood" came from youths at the Atamibranch of the Railroad Ministry training institutes. Work started in July 1944, but was halted shortly after.

Naval Tunnel]

The Japanese Navy headquarters which was against a standoff on Japanese soil were nonetheless allotted a tunnel plan in June 1945. The 300th Division in Yokosuka building aircraft hangers sent half of its strength to build the naval tunnel. It was intended to be 3.5 km long and was 16 km away from the rest of the complex in Matsushiro. The capacity of the tunnel was approximately 1000 people. The group managed 100m into the ground before the surrender.

Comfort Women
Around the shelters, there were three comfort houses with 4 to 5 Korean comfort women servicing these. These were however not intended for soldiers, but primarily for supervisors of higher standing within the ranks of the Korean labourers. However, it is rumoured that children were chided for having stole a glance at soldiers in trucks and women in what appeared to be Chinese clothes.

Among these, there was an entertainment room for female staff of a local company. After its liquidation in 1938, it became in September 1944 an accommodation facility for labourers. To prevent troubles with local women, it was used as a comfort house. In November, a Korean family of five and three comfort women who could not speak Japanese, allegedly brought in by Korean authorities to comfort Korean labourers, started a gambling facility in the premises. It is unclear if concurrently, sexual services were provided. After the war, the family and others left for home.

Location

Major Ida Masataka of the Ministry of War of Japan and later of Kyujo Incident fame, proposed the location. After the general staff approved of it, the Railway Ministry conducted a survey of the area, finalising the plans to build such a complex.

Five points were raised in Ida's proposition;

1) the widest flat area in Honshu, with an airstrip nearby;
2) solid substrate suitable for excavation and ability to withstand 10 ton bombs;
3) completely surrounded by mountains, yet having sufficient flat surface area for underground constructions;
4) abundance of labour (later proven untrue);
5) Nagano prefecture's residents are simple, making the concealment of the facility easier; the old name for Nagano, Shinshu rhymed with God's Land, and is auspicious.

This proposition primarily involved setting up bunkers for the army throughout the Japanese homeland. It was afterwards, that Prime Minister Tojo Hideki expanded the project to accommodate the transfer of the government.

While the project was an operational secret in the guise of a warehouse, from the statement of a local Japanese labourer, rumours were rife in the surrounding villages and towns that the emperor was coming to town. The cause of the rumours was due to the massive amounts of cargo that came on trains.

After the war
1946, a local Buddhist association received permission to convert what was meant to be the imperial palace into a orphanage.
1947, plans to convert the whole complex into an orphanage complex for war orphans were debated but not materialised.

1947, the weather agency sets up a seismographic office in the concrete building at Mount Maizuru. Below, an assortment of seismographs and equipment were placed, making it the largest office of its kind in Japan.

1967, Matsushiro earthquake centre is built on part of the Maizuru ruins following a local earthquake.
1990, parts of the Zouzan bunker are opened by the Nagano Municipality, Shinshu University sets up an astronomical observatory within. Subsequently, more of the complex is opened by the sightseeing department of the same office.

After the surrender of Japan, most of the documentation relating to the Matsushiro complex was destroyed. As a result, very little is known about the day-to-day construction of the facility.

The complex today is administered by Nagano city's sightseeing bureau. The caves are mostly closed to the public - only the first 500 meters of the Mount Zōzan facilities are open.

The city of Nagano spent many years trying to attract the Olympic Games, culminating in their successful bid to host the 1998 Winter Olympics. During the bidding period and again during the games itself, peace activists accused the city of Nagano and the Nagano Organizing Committee (NAOC) of burying the past. Yamane Masako noted that "just the other day, the authorities blocked the entrances to the underground shelters with fences, despite requests that the last Imperial General Headquarters should be preserved and left be open to the public. They're afraid it will hurt their chances to get an Olympic Games to come to Nagano. They're trying to draw down a curtain around the Showa era. It's inexcusable."

During the games, the complex was omitted from all maps and tourist information passed out to visitors. Peace activists asked the NAOC to include the caves on the list of interesting places to visit in Nagano, but their requests went unanswered.
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Offline Ben Valmores

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Re: Why are Tunnels Round?
« Reply #72 on: March 27, 2013, 11:57:26 AM »
more...
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
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Offline Ben Valmores

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Re: Why are Tunnels Round?
« Reply #73 on: March 27, 2013, 11:59:16 AM »
and more..
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
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Offline Ben Valmores

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Re: Why are Tunnels Round?
« Reply #74 on: March 27, 2013, 12:01:39 PM »
another..
“Destiny is not a matter of chance. It is a matter of choice: It is not a thing to be waited for, it is a thing to be achieved.”
---William Jennings Bryan