Sinkholes ‘Bubbling’ As Earthquake Shook Near Christchurch

Workers repair a cell tower on Linwood Ave.

Sink holes opened up in an east Christchurch street as it was smacked by Sunday’s 5.7-magnitude earthquake.

Bower Ave, in Parklands, was due to be resealed on Monday. Residents now face several more months waiting for repairs after the ground opened up.

Authorities fenced and coned off the largest of the sinkholes, which was about three metres long and a metre deep.

Parklands resident Jill Hurley assesses a sink hole that opened up on Bower Ave in Sunday's 5.7 magnitude earthquake.

Liquefaction spewed out of the ground outside Danny Morris’ property on Broadhaven Ave, Parklands, after the earthquake.

Engineers were assessing the scene and taking photos of lateral spreading and liquefaction damage.

Senior geotechnical engineer Pierre Malan said the holes were an “erosion feature”.

“They are a modification of the liquefaction volcanos that people have seen in the past . . . material in the ground has been eroded away by moving fluid which is from liquefaction or a service [pipe].”

Malan said residents should not worry about more holes appearing in the road.

“Because there has been erosion there is unlikely to be voids in the ground which we haven’t seen yet.”

Bower Averesident Tosh Prodanov said he had to drive through sand and water from liquefaction to get to his home.
Geotechnical engineers from Tonkin + Taylor assess new earthquake damage down Bower Ave in Parklands, Christchurch.

Geotechnical engineers from Tonkin + Taylor assess new earthquake damage down Bower Ave in Parklands, Christchurch.

“There was a mixture of sewage and liquefaction, just a whole messy liquid.

“We have been waiting for a long time to get this fixed so I hope it doesn’t delay things too much more.”

Another resident, who only wanted to be known as Melanie, said: “The hole was bubbling when I left for work . . . A digger arrived about 40 minutes after the earthquake to clear the road.

 

Original Article:http://www.stuff.co.nz/national/76878466/Sink-holes-bubbling-as-earthquake-shook-east-Christchurch

 

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