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HISTORICAL OCCURENCE OF LIQUEFACTION IN ZAGREB AREA AND ESTIMATION OF REOCCURENCE IN CASE OF ANOTHER STRONG EARTHQUAKE

Želimir Veinović
Dubravko Domitrović
Tihomir Lovrić


Puni tekst: hrvatski pdf 5.754 Kb

str. 111-120

preuzimanja: 5.698

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Sažetak

During the Great Zagreb's earthquake in 1880 consequences of the liquefaction have been detected at six sites in the vicinity of Zagreb as the occurrence of sand boils. Liquefaction takes place when loosely packed, water-logged sediments near the ground surface lose their strength in response to strong ground shaking. During the liquefaction, due to pore pressure buildup, water may be forced to the surface carrying sand particles through volcano-like sand boils. Important factor for liquefaction occurrence is the state of soil densification which relates to geological age of deposits. Results of the absolute dating of fossilized trees found in Sava's alluvium in the vicinity of Zagreb and the results of the penetration tests show that another earthquake with magnitude ≥ 6.3 can provoke liquefaction once again.

Ključne riječi

liquefaction; Holocene; absolute dating; 14C; mathematical procedures

Hrčak ID:

19299

URI

https://hrcak.srce.hr/19299

Datum izdavanja:

4.12.2007.

Podaci na drugim jezicima: hrvatski

Posjeta: 7.408 *