![]() 25–30, Tokyo, Japanīruland A (1998) Hard rock tunnel boring. Proceedings of 8th International Congress of Rock Mechanics, Sep. īruland A, Dahlo T, Nilsen B (1995) Tunneling performance estimation based on drillability testing. Istanbul Technical University, Faculty of Mines, Mining Engineering Department Wilhelm Ernst & Sohn. International Congress ITA, Seul (Korea)īilgin N, Copur H, Balci C (2016) TBM excavation in difficult ground conditions. RETC, Toronto, p 1118īieniawski Z, Tamames B, Fernandez J, Hernandez M (2006) Rock mass excavability (RME) indicator: new way to selecting the optimum tunnel construction method. Tunn Tunn Int 31(9):41–48īieniawski Z, Celada B, Galera J (2007) TBM excavability: prediction and machine-rock interaction. Proceedings of the 3rd international congress IAEG, Madridīarton N (2000) TBM performance estimation in rock using QTBM. This new model can be employed as a new method for predicting the boreability of jointed rock mass.Īeberli U, Wanner W (1978) On the influence of discontinuities at the application of tunneling machines. Finally, a new boreability index is presented for jointed rock mass with a correlation coefficient of 0.78. Accordingly, the total fracturing factor has been used to analyze the effect of joint orientation and spacing on the new index. The results show that the convergence of the new index with actual boreability index is higher in comparison with the other two indexes. To verify the new index, a PPT was performed on a number of other samples from different sections of the tunnel, and the new index was compared with the peak strength index (presented by Yagiz) and the peak load index (presented by Jing). Accordingly, an equation is presented with a correlation coefficient of 0.68. Statistical analysis between force to penetration in PPT with actual boreability index shows that there is a significant relationship between these two parameters. Then, based on the evaluation of the TBM data logging system, the correlation between the results of TBM and PPT has been investigated for the same sections. In this regard, PPT was performed on rock samples from different sections of the Kerman water conveyance tunnel in Iran. In this study, punch penetration test (PPT) has been chosen as a basis for predicting jointed rock mass boreability. Consolidating plans, policies and ordinances that benefit multiple utility services while supporting economic growth and redevelopment.Predicting rock mass boreability for excavation with tunnel boring machines (TBM) is one of the most important issues that should be considered for managing a tunneling project.Recognizing the circularity of local economies and repurposing traditional waste as a valued resource (such as using biosolids to produce energy, using reclaimed water to augment potable water supplies, or integrating stormwater in functional landscapes.).Incorporating Jacobs’ domain-driven innovation and technology, including Digital OneWater- our ecosystem of integrated data-enabled solutions. ![]() Identifying future actions and investments focused on climate adaptation and resilience, including tackling water scarcity and urban flooding with integrated water management practices.Engaging the full range of community stakeholders, including customers, businesses and public officials, to find opportunities for successful partnerships and promote local workforce development and social equity.Maximizing investments by implementing solutions that address multiple interconnected challenges and provide meaningful co-benefits.Our complete technical expertise includes drinking water & reuse, wastewater, water conveyance & storage, water resources and digital solutions. Our OneWater approach is supported by our industry-leading capabilities across the entire water cycle and project lifecycle – from planning and consulting to design-build and operations. Our approach is through a OneWater lens – viewing all water as resource and developing integrated, holistic solutions that provide comprehensive benefits. We recognize that water challenges are complex and interconnected, and that the old ways of managing the water cycle in silos cannot keep pace with the issues we all face. From climate change to emerging contaminants, our clients are facing unprecedented challenges as they work to provide critical water services and protect their communities and the environment.Īt Jacobs, our planners, engineers and scientists work with our clients every day to solve their water challenges with customized, innovative solutions and new ways of thinking. But managing this essential resource has never been more complicated. Water is one natural resource we all share – it shapes our lives, our communities, our ecosystems and the Earth’s climate.
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