We are pleased to present to you the current edition of the English Journal GeoResources.
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Hydraulic earth dams, e. g. dikes, often possess inadequate or even no waterproofing so that seepage can occur possibly affecting the stability during impounding. Within the scope of a R+D project, a Low Pressure Injection (LPI) method for soft grounds was developed, capable of achieving a higher sealing level through the application of acrylate gels. The focus is directed at eliminating leaks in seals, the connecting areas between the earth and massive structure as well as crossings. Mixing the granular structure with the injection grout substantially improves the shear and uniaxial compressive strength and significantly reduces the hydraulic conductivity in the grouted soil matrix.
Building with Geosynthetics in the Stuttgart-Ulm Major Project of the Deutsche Bahn AG – Part 1
Waterproofing the Track to protect the Groundwater
Geosynthetics are being used in different areas and for different purposes in the Deutsche Bahn AG’s Stuttgart-Ulm major project. Part 1 of a series of articles examines waterproofing the Track on the Alb Plateau section with geomembranes.
Increasing urbanization places high demands on urban infrastructure. New infrastructure is required and existing facilities have to be extended. Intraurban interventions causing the least possible disturbance are frequently carried out in densely populated and built-up areas within a tight timeframe. Micropiling can contribute towards satisfying the challenges. This article presents infrastructure projects using self-drilling micropiles in four areas: public services, transportation, telecommunications and heritage conservation. The special requirements are briefly described, and the geotechnical solutions presented. Finally, a summary of micropiling in urban areas is given.
Geobrugg developed together with international experts an attenuator protection solution which can be efficiently dimensioned. This low maintenance rockfall protection was presented in Canada.
Company News and Conference
Geoconsult Asia Singapore celebrated with more than 200 guests and employees 20 years of successful and reliable operation not only in Singapore, but in the whole Asia-Pacific region. On occasion of this anniversary, Geoconsult organized a technical symposium in September 2018 presenting some of the most interesting topics of the world wide operating company.
The Deilmann-Haniel GmbH is executing freezing operations to produce the cross-passages in the road tunnel beneath the Suez Canal in Egypt. This article deals with the technical and construction operational challenges.
A 10 Tauern Motorway near Zederhaus in Austria – Infiltration-proof geosynthetic System for Noise Reduction Tunnel
The Asfinag (Austrian Motorway and Highway Financing Corporation) invested in a complex noise protection measure on the A 10 motorway near Zederhaus. The Huesker Synthetic GmbH devised an innovative, infiltration-proof sealing system made of geosynthetics for the noise reduction tunnel produced by cut-and-cover.
Tunnelling and Interview
Roland Herr interviewed Professor Jenny Yan. She is currently the Vice President of the ITA; Vice President of the Chinese Tunnelling and Underground Works Society of CCES and Deputy General Manager of China Railway Academy Co., Ltd.
With more than 1,600 chinese and about 130 international tunnel experts, the Chinese Tunnelling and Underground Works Society of CCES (China Civil Engineering Society) very successfully organized the 20th Chinese Tunnel and Underground Works Conference (CTUC) in 2018.
Mining and Geotechnics
The classic German book about hydrogeology by Hölting and Coldewey is now available in English as well.
Blast Performance Improvement using Stemming Plugs at Limestone Quarries in the Salt Range of Pakistan
Stemming inside a blast hole plays a vital role for optimizing blast results. Blasting may result in issues like flyrock and an unnecessary number of boulders. At some sites, blasted material does not move laterally to generate good throw with blasting. As a solution to the existing problems, newly developed stemming plugs have been tested on-site to check their performance. This paper presents blasting tests using stemming plugs on limestone quarries in the Salt Range of Pakistan. The results demonstrate better fragmentation with a reduced number of boulders and better throw of blasted material. The productivity of loading operations increases and the overall operational costs at quarries can be reduced.
Mining and Tunnelling
The CFT GmbH Compact Filter Technic recently accomplished international cooling projects with innovative solutions to ventilate tunnel drives and mines as well as shaft sinking schemes in conjunction with the WAT Wärme-Austausch-Technik GmbH.
Mining, Tunnelling and Geotechnics
Many accidents occur every day in working environments – avoidable and unavoidable by unforeseeable events. HCL’s Worker Safety solution aims to make risk-oriented occupations safer and to create a near-zero hazard working environment.
GeoResources Zeitschrift and Journal - Time and Subject Schedule 2019