Sinkholes, Disappearing Lake Threaten South Korea's Lotte World Tower Skyscraper
South Korea’s Lotte World Tower, which was designed to be one of the tallest skyscrapers in the world upon completion, is being threatened by the sudden appearance of sinkholes in the area. The sinkholes, which are destroying streets in the surrounding residential area, come as a nearby lake has also begun to disappear, two problems that could delay construction of the skyscraper indefinitely.
The Lotte World Tower, first unveiled in 1995, is to reach more than 1,800 feet high when it’s finished in 2016 but, as crews get closer to that date, problems complicating the construction are becoming more serious. Multiple sinkholes were reported in the last two months in the Songpa neighborhood, the area in Seoul the Lotte World Tower calls home. One hole, the Associated Press said, is 1,640 feet from the construction site and measured 1.5 feet wide and nearly 8 inches deep.
Images of more serious sinkholes have gained traction on social media with each new discovery.
Sinkholes appear for a variety of reasons, human fault being one of them. The sudden cracks in the earth happen after years of dissolution just beneath the surface. Often, erosion is hastened by a sudden influx of water or outflow of water, depending on the type of rock underlying the soil in an area. A sinkhole made international headlines earlier this year when it swallowed eight corvettes that, just moments before, were sitting safely inside the National Corvette Museum in Bowling Green, Kentucky.
The questions for Korean officials are complicated by word a small lake not far from the Lotte World Tower site has seen its water level drop from 16.5 feet to 14 feet. Park Chang-khun, a civil engineering professor at Kwandong University, told the AP underground water was pooling in the sixth basement level of the Lotte building, with water displaced from the lake being pointed to as the likeliest suspect. The Lotte Group overseeing the tower’s rise has promised there is no danger, though those assurances have done little to sway public opinion.
“It has not guaranteed safety psychologically,” Park said. “Ordinary people would feel even more nervous when Lotte keeps saying it is safe architecture engineering wise.”
An environmental review aims to find out if the sinkholes and other oddities have in fact been caused by construction on the Lotte World Tower but, with more than half of the 123 stories complete, the undertaking is also being examined with the recent Sewol tragedy in mind. Approximately 300 people, most of them students, were killed in April when a South Korean ferry capsized, which prompted government officials to refocus on safety standards and accident preparedness.
Sinkholes have been a problem for South Korea in the past, with Korean news station Arirang TV reporting in the past five years alone, Seoul has seen 133 sinkholes develop.
_http://www.ibtimes.com/sinkholes-disappearing-lake-threaten-south-koreas-lotte-world-tower-skyscraper-video-1647448
April 2015 – CHINA – A blazing sinkhole in northwest China terrified locals, attracting tourists as well as researchers and prompting questions about its origin. The temperature on top of the burning crater was estimated to be 792 degrees Celsius (1,457 degrees Fahrenheit). Due to the deadly heat, scientists have been unable to come close enough to the crater to measure how deep it really is. Located in the Xinjiang Uighur Autonomous Region, near Urumqi, in northwest China, the sinkhole is 0.9 meters (3 feet) wide.
It is hot enough to light up branches and other objects placed next to it. Various tourist videos show people setting things on fire. Locals have dubbed it a “gateway to hell.” Many have told the Chinese media that the ground in the area has been hot for some time now. There is no volcanic activity in the region, which led scientists from the Xinjiang Meitian Geological Bureau to believe that the sinkhole was created out of coal seam spontaneously combusting. The area was reportedly used for mining in the 1970s, China Central TV cited a supervisor from Xinjiang Meitian Fire Engineering Bureau, Chen Long, as saying, the Daily Mail reported.
“Primitive mining and extinguishing techniques caused coal to burn deep under the ground,” Chen said. “Operators didn’t seal the mines properly after business discontinued and this leads the underground fire to burn towards the surface of the earth.” Similar phenomena on a larger scale were spotted in Turkmenistan and America’s Pennsylvania. The former, referred to as the “the door to hell,” is a gas crater that has been burning in a Turkmen desert for more than 40 years. The one in Pennsylvania is a coal mine fire that has been burning since May 1962. –RT News
_http://www.theyucatantimes.com/2015/08/enormous-sinkhole-opens-up-in-the-middle-of-playa-del-carmen-cancun-highway/ said:Enormous Sinkhole Opens up in the Middle of Playa del Carmen-Cancun Highway
A sinkhole appeared suddenly in the middle of the Playa del Carmen-Cancun highway on Wednesday August 26th, around 4 in the morning, causing the total collapse of the road in both directions, however, it seems not to be a common sinking, but literally the “birth” of a ‘cenote’.
This was announced by Martin Estrada, head of the municipal police of Solidaridad, Quintana Roo. He reported that so far there’s only one person (not seriously) injured and one damaged vehicle.
Authorities closed down the Federal Road towards Puerto Morelos, near the Iberostar Hotel. In fact, the initial report of this “trench” was done by staff of the hotel.
The cavity is approximately 10 meters wide and one meter deep, it is estimated that 3.5 tons of asphalt were displaced, however, inhabitants of the area speculate that this could be the “birth” of a cenote, or a cavern that harbor to an underground river, that was probably covered up when the road was built.
The recommendation for all motorists is to use the alternate route Nuevo Xcan – Playa del Carmen.
On Wednesday August 25th, local authorities made a call on all drivers heading to Cancun International Airport from Playa del Carmen and workers going from Cancun to Playa, to slow down and be cautious while driving by the area of the incident.
angelburst29 said:‘It’s A Monster’: Massive Sinkhole Closes Part of Oregon Highway 101 (Photos - Video)
http://www.nbcnews.com/news/us-news/it-s-monster-massive-sinkhole-closes-part-oregon-highway-101-n506766
A huge sinkhole that won’t stop growing has shut down a stretch of Highway 101 in coastal Oregon.
“It’s massive. There’s just no other way to describe it,” Jared Castle, Department of Transportation spokesman for southwest Oregon, told NBC News.
The state closed down part of 101 in Harbor, Oregon, on Thursday night due to the sinkhole, which is the second sinkhole in as many months in the area. The first one opened on Dec. 13 in a restaurant parking lot next to the highway and, like Thursday’s sinkhole, just kept growing.
The two sinkholes “probably have now met,” Castle said, creating one gaping hole in the highway.
“It’s a monster,” he said. Officials did not know how big it was, but said its depth exceeds 60 feet.
There have been no injuries or evacuations, and officials have re-routed traffic to a detour that runs parallel to the highway, which Castle says will only add 5 or 10 minutes to drivers’ commutes.
The sinkholes formed after a series of heavy rains pounded the Oregon coast, causing a landslide north of Harbor and shutting down other highways due to debris flow.
Sinkholes and landslides frequently occur in the region because of the geology of the area, Castle said.