Vpliv matrične sukcije na pomike plazu Slano blato

doktorska disertacija

Matej Maček (Author), Bojan Majes (Mentor), Matjaž Mikoš (Thesis defence commission member), Janko Logar (Thesis defence commission member), Ana Petkovšek (Thesis defence commission member), Breda Mirtič (Thesis defence commission member)

Abstract

V doktorski disertaciji je obravnavan vpliv matrične sukcije na pomike plazu Slano blato. V prvem delu disertacije je predstavljena retencijska krivulja in empirični materialni modeli za opis inženirskih lastnosti nezasičene zemljine v odvisnosti od matrične sukcije. Opisane so tudi metode merjenja sukcije, vzroki za gibanje vode v vadozni coni zemljine, pojav krčitvenih razpok in reološki modeli za oceno lezenja plazov. V praktičnem delu naloge je predstavljen plaz Slano blato, ki je z ocenjenim volumnom nestabilne mase preko 106 m3 eden izmed štirih velikih zemeljskih plazov v Sloveniji. Na podlagi meritev sukcije v laboratoriju in izkazane relevantnosti vpliva sukcije na stabilnost plazu so bili na plazu v jeseni 2007 vgrajeni Watermark merilniki sukcije. Za potrebe ocene lezenja plazu pa so bile v letu 2011 vgrajene tudi geodetske točke. V nadaljevanju so predstavljene obsežne laboratorijske preiskave za kvaliteten opis dogajanja v zemljini med sušenjem in ponovnim vlaženjem ter preiskave lezenja zemljine ob konstantni strižni obremenitvi. Na podlagi laboratorijskih raziskav je bil razvit materialni model, ki opisuje retencijsko krivuljo materiala in strižno lezenje zemljine. S terenskim opazovanjem pridobljene robne pogoje na površini plazu Slano blato (padavine in potencialna evapotranspiracija) smo vstavili v numerični program, ki z že omenjenim materialnim modelom opisuje 1D tok vode. Numerične izračune smo primerjali s terenskimi meritvami sukcije. Podobno, smo na podlagi terenskih meritev in numeričnih izračunov sklepali tudi na pomike plazu Slano blato. V zaključnem poglavju so predstavljene sklepne ugotovitve ter priporočila za nadaljnje raziskovalno delo.

Keywords

gradbeništvo;mehanika zemljin;nezasičene zemljine;laboratorijske preiskave;terenske preiskave;lezenje zemljin;plaz Slano blato;disertacije;

Data

Language:	Slovenian
Year of publishing:	2012
Typology:	2.08 - Doctoral Dissertation
Organization:	UL FGG - Faculty of Civil and Geodetic Engineering
Publisher:	[M. Maček]
UDC:	551.435.6:624.131(043.3)
COBISS:	5985633
Views:	2799
Downloads:	584
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	ǂThe ǂinfluence of matric suction on the movements of Slano blato landslide
Secondary abstract:	This PhD thesis presents the impact of matric suction on the movements of Slano blato landslide. The first part of the thesis presents water retention curve and the empirical material models which describe the engineering properties of unsaturated soil as a function of matric suction. Methods for suction measurements, water movement in the vadose zone, the occurrence of shrinkage cracks and rheological models for landslide creep description are also presented. In the practical part of the thesis Slano blato landslide is presented. Slano blato landslide is with an estimated volume of 106 m3 one of the four major landslides in Slovenia. Due to shown contribution of matric suction on landslide stability, Watermark suction sensors were installed in Slano blato landslide in autumn of 2007. For the landslide creep measurements measuring geodetic point were installed in 2011. In the next part the extensive laboratory tests for description of soil during wetting and drying or shearing with constant shear stress are presentment. Based on laboratory studies material model has been developed, which describes the water retention curve and landslide creep. The obtained boundary conditions on the surface of the Slano blato landslide from the field observations (precipitation and potential evapotranspiration) were inserted into the numerical program. The program describes 1D water flow with the above-mentioned material model. Numerical calculations were compared with field measurements. On the basis of field measurements and numerical calculations the Slano blato landslide were estimated. The final chapter presents conclusions and recommendations for further research.
Secondary keywords:	doctoral thesis;civil engineering;soil-mechanics;unsaturated soil;laboratory test;field observations;creep;
URN:	URN:NBN:SI
File type:	application/pdf
Type (COBISS):	Dissertation
Thesis comment:	Univ. v Ljubljani, Fak. za gradbeništvo in geodezijo
Pages:	XXVIII, 210 str.
ID:	1725351