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Title:A three-dimensional static numerical model of a complex underground structure in high squeezing ground
Authors:ID Marolt Čebašek, Tina (Author)
ID Likar, Jakob (Author)
ID Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru (Copyright holder)
Files:.pdf Acta_geotechnica_Slovenica_2015_Marolt_Cebasek,_Likar_A_three-dimensional_static_numerical_model_of_a_complex_underground_structure_in_h.pdf (606,20 KB)
MD5: B7E7180AFE8E3971AC2696771DD03529
PID: 20.500.12556/dkum/3b3a6fe3-45be-4ca4-812d-1b601cd75aaa
 
URL http://fgserver3.fg.um.si/journal-ags/2015-1/article-1.asp
 
Language:English
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
Abstract:The present study assesses high squeezing ground confirmed by empirical and semi-empirical theories. High squeezing ground is often present in underground constructions at great depths, but it is hardly ever researched separately from light and fair squeezing ground. A three-dimensional, static numerical model is developed for a complex underground structure consisting of a shaft, a silo, and a mine roadway at great depth, which is certainly in high squeezing ground. Furthermore, a solution for the entire structure based on shotcrete with incorporated yielding elements is provided. The yielding elements, in general, absorb the strain energy by compressing at a relatively constant stress, but without rebounding. A three-dimensional, static numerical model of a support system with incorporated yielding elements is established in order to demonstrate that the presented forces are under control. Therefore, a failure of the lining is avoided because the stresses in the shotcrete lining are below its load-bearing capacity. It can be concluded that yielding elements incorporated in the shotcrete lining play an important role in the support solution in high squeezing ground.
Keywords:high squeezing ground, numerical model, underground structures, deformations, yielding support element
Publication status:Published
Publication version:Version of Record
Year of publishing:2015
Number of pages:str. 4-15
Numbering:Letn. 12, št. 1
PID:20.500.12556/DKUM-70827 New window
ISSN:1854-0171
UDC:624.131
ISSN on article:1854-0171
COBISS.SI-ID:1543519 New window
NUK URN:URN:SI:UM:DK:5XUGQPYA
Copyright:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
Publication date in DKUM:14.06.2018
Views:1246
Downloads:216
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Categories:Misc.
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Record is a part of a journal

Title:Acta geotechnica Slovenica
Shortened title:Acta geotech. Slov.
Publisher:Fakulteta za gradbeništvo, prometno inženirstvo in arhitekturo Univerze v Mariboru
ISSN:1854-0171
COBISS.SI-ID:215987712 New window

Secondary language

Language:Slovenian
Title:Tridimenzionalni statični numerični model kompleksnega podzemnega objekta v zelo iztisljivi hribini
Abstract:V predstavljeni raziskavi je ocena zelo iztisljive hribine potrjena tako z empiričnimi kot polempiričnimi teorijami. Zelo iztisljive hribine so pogosto prisotne v geološki zgradbi skupaj z malo do srednje iztisljivimi plastmi, v katerih poteka gradnja podzemnih prostorov v večjih globinah, zato izvedene raziskave geomehanskih lastnosti niso ločene za vsako hribinsko kategorijo posebej. Da bi bili ugotovljeni temeljni geomehanski vplivi med vertikalnim jaškom, silosom in dovozno jamsko progo, je bil izdelan tridimenzionalni statični numerični model za kompleksen sistem navedenih podzemnih prostorov, ki se nahaja v večji globini v zelo iztisljivih hribinskih plasteh. Za zagotovitev stabilnih razmer gradnje kompleksnega sistema podzemnih prostorov je bil v 3D-modelu upoštevan podporni sistem iz obloge iz brizganega betona z vključenimi popustljivimi elementi. Ti so v splošnem dovolj popustljivi, da absorbirajo deformacijsko energijo s stiskanjem pri relativno konstantni napetosti in nepovratni deformaciji. S 3D-simulacijo izkopa in vgradnje podpornih elementov, ki je upoštevala popustljiv podporni sistem, je bilo dokazano, da reaktivne sile v popustljivem podpornem sistemu ustrezajo še dovoljenim pomikom ostenja analiziranih podzemnih prostorov. Rezultati poglobljenih geomehanskih simulacij obnašanja kompleksa podzemnih objektov v zelo iztisljivi hribini so osnova za pravočasno ukrepanje pri povečanih deformacijah za preprečitev porušitve obloge iz brizganega betona. Analize, ki so bile narejene s poudarkom na medsebojnem učinkovanju med popustljivimi elementi in oblogo iz brizganega betona v zelo iztisljivem hribinskem mediju, so osnova za izvedbo kakovostnega načrtovanja kompleksnih podzemnih prostorov v zelo zahtevnih geotehničnih razmerah.
Keywords:zelo iztisljiva hribina, numerični model, podzemni objekti, deformacije, popustljiv podporni element, iztisljiva hribina


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  1. Acta geotechnica Slovenica

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