{"title":"Dealing with natural hazards along federal and state roads in Bavaria","authors":"Thomas Zumbrunnen, K. Thuro, S. König","doi":"10.1002/geot.201600072","DOIUrl":"https://doi.org/10.1002/geot.201600072","url":null,"abstract":"Roads in the municipal Berchtesgaden are among the traffic infrastructure in Germany most highly endangered by natural hazards. Landslide, avalanche, rockfall and debris flow events led to repeated accidents and road closures. In order to improve the safety of main roads, a three‐stage approach has been introduced by the responsible road authority, especially in the light of finding the most suitable and sustainable solutions quickly. The first stage was a systematic spatial detection and delineation of all risk areas, as well as assessment of the level of risk and the resulting urgency. Based on this assessment, a more detailed investigation was conducted, leading to the development of tailored protection concepts. The main criteria for the entire design phase of any measure have always been the necessary level of protection, reasonable costs and environmental compatibility. Matching all these requirements is critical for rapid construction and therefore a reasonable use of resources. A good example of this approach is the integral protection concept for the B 21 main road with its central structure of a multifunctional protection gallery near Baumgarten. This has been completed recently, and several other projects are currently under construction.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129569682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Comparison of two 3D rockfall codes on behalf of a case study in the Bavarian Alps","authors":"Bettina Sellmeier, K. Thuro","doi":"10.1002/geot.201600071","DOIUrl":"https://doi.org/10.1002/geot.201600071","url":null,"abstract":"Rockfall events along main traffic routes in alpine regions emphasize the necessity of enhancing hazard assessment, especially in terms of rockfalls. In the field of regional rockfall modelling it becomes more and more important to work with 3D rockfall codes to account for morphological structures. Due to the general scale of regional rockfall modelling it is in most cases not possible to collect quantitative field data. Thus the input parameters are determined according to disposition models like in the Bavarian hazard map. The current paper deals with a detailed rockfall study which was accomplished during rockslope scaling works in the Bavarian Alps. The rock slope consisting of the Hauptdolomite‐Formation extends along the federal road B 305 north of the village of Schneitzlreuth in Bavaria. Due to attending rockslope scaling works in cooperation with the State Agency for Construction in Traunstein, a quantification of block dimensions according to real rockfall field tests was possible. After having determined the three main block axes for over 300 rocks, rockfall modelling were accomplished applying the 3D rockfall codes Rockyfor3D and Ramms::Rockfall. One part of the parameter studies covers the main proportion of the detected block sizes using Rockyfor3D. The second part of the study presents a comparison of the Rockyfor3D and Ramms::Rockfall outcomes, taking the same block class for both codes into account. This paper demonstrates the limits and possibilities of using different 3D rockfall codes taking detailed field data into account.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131881460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Preview: Geomechanics and Tunneling 2/2017","authors":"","doi":"10.1002/geot.201770110","DOIUrl":"https://doi.org/10.1002/geot.201770110","url":null,"abstract":"","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123159982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Application of three‐dimensional rockfall modelling to rock face engineering","authors":"C. Wendeler, Y. Bühler, P. Bartelt, J. Glover","doi":"10.1002/geot.201600073","DOIUrl":"https://doi.org/10.1002/geot.201600073","url":null,"abstract":"Many problems in engineered rock faces involve evaluation of the efficiency of rockfall mitigation measures, specifically rockfall dams, embankments and catch nets. Existing rockfall trajectory models are not suited for this purpose because they do not consider the non‐linear dynamics of rock motion, which is highly dependent on rock size, shape and impact configuration. In this paper, we discuss the application of the new 3D rockfall modelling tool Ramms::Rockfall, which computes rock‐ground interactions using hard‐contact impact mechanics. The model is applied to evaluate the effectiveness of a rockfall bank at the Geobrugg/WSL test site in Walenstadt, Switzerland.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125881472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Undrained behaviour of granular soils conditioned for EPB tunnelling – A new experimental procedure","authors":"Daniele Martinelli, Rodrigo Winderholler, Daniele Peila","doi":"10.1002/geot.201600019","DOIUrl":"https://doi.org/10.1002/geot.201600019","url":null,"abstract":"This paper presents a characterisation campaign carried out on granular soils conditioned for EPB tunnelling using a modified direct shear box. The main objective of soil conditioning is the reduction of its shear strength to control the counterpressure inside the bulk chamber. In order to preserve the pseudo‐fluid characteristics of the conditioned soil mass, the main concerning para meters are their undrained properties. To characterise the un drained behaviour an adopted watertight direct shear apparatus was used. The purpose of this research is to define a simplified testing procedure for conditioned soil, analysing its feasibility and reliability with resources that can be found at any laboratory or job site. A comparison between the results obtained under dry and conditioned conditions is presented for three different cohesionless soils. The choice of the materials studied has been made in order to cover a wide range within sands grain size.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122447484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Engineering geological and geotechnical analysis of a rock slide in the quarry Frauenmühle near Metten (Lower Bavaria)","authors":"M. Nickmann, Theresa Schweigl, K. Thuro","doi":"10.1002/geot.201600068","DOIUrl":"https://doi.org/10.1002/geot.201600068","url":null,"abstract":"In spring 2008 a rock slide detached from one of the walls in the quarry ”Frauenmühle“ locally used as climbing park, mobilizing a volume of 50 m3. The binary granite is relative fresh on the bottom of the walls, but the weathering increases significantly to the natural surface. The bedrock shows an orthogonal joint system enabling the so‐called ”Wollsackverwitterung“. Mapping of the joints followed by a kinematic analysis of the quarry wall by DIPS (Rocscience) indicates the slope failure to be of a planar sliding type on a medium‐steep dipping plane. As the contributing factor for the slide, weathering along the plane has to be considered. Thereby the destruction of rock bridges downgrades the overall shear strength. A stability analysis based on the reconstructed block geometry and the determined shear parameters verifies the instability of the block. For today's situation, the kinematic analysis detects some critical intersections of joints being able to generate slide wedges.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122503924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Creep behaviour and remediation concept for a deep‐seated landslide, Navistal, Tyrol, Austria","authors":"R. Hofmann, J. T. Sausgruber","doi":"10.1002/geot.201600066","DOIUrl":"https://doi.org/10.1002/geot.201600066","url":null,"abstract":"In the valley of Navis, the village of Kerschbaum with 84 houses stands on a slowly downhill moving, relatively corase grained, aqua bearing earth‐flow/‐slide about 40 m thick. This secondary movement overlies a deep‐seated rock slide. The rates of movement at the surface of the earth‐flow/‐slide were between 1 und 3 cm/a before the implementation of remedial works. Starting from the geotechnical and geomechanical model of the slope, measures were developed, which were intended to reduce the movement. A monitoring system was installed to provide information about the movement and slope water conditions of the earth‐flow/‐slide and the sliding rock mass. In order to estimate the creep behaviour of the earth‐flow/‐slide, the ductility index ILZR was determined from shear tests. A simple flow law was assumed for the estimation of the change of creep rate. Measurements over a period of about 18 months after the first phase of remedial works show rates between 0.5 and 1.2 cm/a. The reduction of the rate of movement is compared with the creep model applied and the viscosity index ILZR to check the validity.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124373262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"3D images for digital geological mapping","authors":"A. Gaich, G. Pischinger","doi":"10.1002/geot.201500048","DOIUrl":"https://doi.org/10.1002/geot.201500048","url":null,"abstract":"3D images combine visual and geometric information making them an obvious source for capturing and characterising rock surfaces especially when there are constrained time and access conditions. By taking photographs with an off‐the‐shelf camera and using modern algorithms from photogrammetry, 3D imaging has become state of the art on many conventional tunnel construction sites. Data is acquired on a daily basis, processed, geologically assessed, and finally stored in a suitable data base. The contribution provides a brief introduction of the technology and its measurement capabilities, as well as a description of the practical application during the construction of the 8 km long Gleinalmtunnel in Austria.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"60 Suppl 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"119743140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"People: Geomechanics and Tunnelling 4/2015","authors":"","doi":"10.1002/geot.201590031","DOIUrl":"https://doi.org/10.1002/geot.201590031","url":null,"abstract":"Johann Golser – Congratulations on your 75th birthday! / Johann Golser – Gratulation zum 75. Geburtstag! (by Robert Galler)","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130721403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Gratzer, A. Bechtel, R. Sachsenhofer, H. Gawlick
{"title":"Geogenic versus Anthropogenic: Hydrocarbons in the Spoil from the Falkenstein and Spering Tunnels (A9 Pyhrn Autobahn, Austria)","authors":"R. Gratzer, A. Bechtel, R. Sachsenhofer, H. Gawlick","doi":"10.1002/GEOT.201500018","DOIUrl":"https://doi.org/10.1002/GEOT.201500018","url":null,"abstract":"In the Falkenstein und Spering tunnels (A9 Pyhrn Autobahn; Northern Calcareous Alps), hydrocarbon contents (HC Index) in excess of the permitted threshold values were detected in the course of the routine statutory analysis of the excavated material. Comparative detailed geochemical analysis of retained reference samples, operational consumables and core samples from boreholes drilled into the tunnel wall show that threshold values of HC indices in the Reifling Limestone are exceeded due to the presence of locally generated natural hydrocarbons. The hydrocarbons were probably formed in marly zones of the carbonate rocks and migrated into the well‐developed fracture network. These hydrocarbons are characterized by high contents of n‐alkanes, high Ts/(Ts+Tm) ratios, a predominance of C27 and C29 steranes, and the lack of oleanane. Traces of hydrocarbons in the Wetterstein Limestone contain oleanane due to contamination by operating consumables.","PeriodicalId":170042,"journal":{"name":"Geomechanics and Tunnelling","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126100773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}