On the Thermal Activation of Turin Metro Line 2 Tunnels

The Turin metro Line 2 will extend for nearly 28 km and include 26 stations. It will connect the SW suburbs of the city to the NE ones. The excavation will be performed by means of TBM and Cut & Cover techniques and, once concluded, will host a fully automated driverless light metro. This paper will describe the feasibility study carried out to assess the energy potential of the thermal activation of the line by using an innovative tunnel lining segment (ENERTUN) recently patented and tested in real operating conditions. A novel methodology was adopted, involving thermo-hydraulic 3D FE numerical anal- yses to identify the geothermal potential for the different sections of the line. A study of the possible collectors for the thermal energy produced was also performed considering the planned stations, the existing buildings and the future urban developments

DETERMINAZIONE DELLE CONDIZIONI OTTIMALI DI CONDIZIONAMENTO DEI TERRENI DURANTE LO SCAVO CON EPB TRAMITE SLUMP TEST

La nota descrive i risultati di una campagna di prove di consistenza (slump test), finalizzata alla determinazione speditiva delle condizioni ottimali di condizionamento del terreno nel caso dello scavo di gallerie con TBM-EPB. In particolare il lavoro si concentra sul confronto tra il comportamento di terreni di caratteristiche granulometriche diverse tra loro, indagando un campo più ampio rispetto a quanto attualmente disponibile in letteratur

INTEGRAZIONE TRA MONITORAGGIO E MODELLAZIONE DELLE GRANDI FRANE IN ROCCIA NELL'OTTICA DELL'ALLERTAMENTO RAPIDO

Nella presente nota si intendono illustrare gli sviluppi di un progetto di ricerca che prevede l'integrazione tra tecniche di monitoraggio e modelli numerici avanzati per lo studio delle grandi frane in roccia ai fini di un allertamento rapido delle popolazioni e delle infrastrutture esposte al rischio. In particolare tra le tecniche di monitoraggio si prenderanno in esame l'interferometria radar da terra (GBInSAR), mentre a livello di modellazione numerica l'attenzione verrà rivolta al metodo ibrido elementi finiti/elementi distinti (FDEM). Con riferimento ad alcuni casi reali, i modelli numerici, validati e calibrati sui dati di monitoraggio, verranno utilizzati per la produzione di scenari di evoluzione dei fenomeni franosi oggetto di studio. I risultati della modellazione consentiranno di definire particolari soglie (spostamenti, velocità, altezze piezometriche etc..), in base ai diversi scenari simulati, da cui si potrà ottenere una valutazione rapida del livello di criticità associata al fenomeno in esam

LE GALLERIE METROPOLITANE COME SCAMBIATORI DI CALORE: UNA IDEA DI APPLICAZIONE A TORINO

L'attivazione termica dei rivestimenti delle gallerie urbane può consentire di sfruttare l'inerzia termica del sottosuolo al fine di riscaldare o raffrescare gli edifici in superficie. Nell'ambito di una ricerca in corso al Politecnico di Torino, la nota descrive una possibile applicazione alla metropolitana di Torino descrivendo alcuni risultati di analisi numeriche finalizzate a studiare gli effetti dell'attivazione termica del rivestimento della galleria sulla falda preesistent

Failure and deformation behavior of underground geo-structures: advances in geomechanics.

Underground geo-structures play a crucial role in various aspects of modern society for several reasons [...

Early warning monitoring of natural and engineered slopes with Ground-Based Synthetic Aperture Radar

The first application of ground-based interferometric synthetic-aperture radar (GBInSAR) for slope monitoring dates back 13 years. Today, GBInSAR is used internationally as a leading-edge tool for near-real-time monitoring of surface slope movements in landslides and open pit mines. The success of the technology relies mainly on its ability to measure slope movements rapidly with sub- millimetric accuracy over wide areas and in almost any weather conditions. In recent years, GBInSAR has experienced significant improvements, due to the development of more advanced radar techniques in terms of both data processing and sensor performance. These improvements have led to widespread diffusion of the technology for early warning monitoring of slopes in both civil and mining applications. The main technical features of modern SAR technology for slope monitoring are discussed in this paper. A comparative analysis with other monitoring technologies is also presented along with some recent examples of successful slope monitorin

Pengaruh Tingkat Intensitas Pemberian Latihan Soal Terhadap Prestasi Belajar Siswa Dalam Mata Pelajaran Pkn

Exercise is an activity of repetition in the learning process that aims to motivate students to better understand the learning materials in order to obtain better results. With the provision of the exercises that the students are expected to help improve student learning outcomes especially in subjects Citizenship Education. The purpose of this study was to clarify the effect of the intensity level of giving exercises on student achievement in the subjects of Civics class VII at Junior High School 21 Bandar Lampung academic year 2012/2013. The research method used in this study is a quantitative method of testing the influence. The samples in this study were 30. Data analysis using Chi Square. The results showed that: (1) the influence of the intensity of the exercises provision (X) dominant in the category of influential with percentage 36.6%, (2) achievement (Y) dominant in the high category with the percentage of 40%, (3) the results of research shows there is a positive relationship, significant, and category tinngi closeness between the effect of the intensity level of the provision of the learning exercises, which means that the prominence of the level of intensity of exercises possible giving further improve student achievement in the subjects of Civics

Energy Tunnels for Deicing of a Bridge Deck in Alpine Region

Roads and paved surfaces in cold climate are exposed to the formation of ice and snow deposition. These phenomena are related to high risks for vehicles and road users due to reduced friction. Deicing techniques are up to now mainly based on chemicals, especially salt. These substances induce chemical decay of concrete infrastructure elements and environmental harm. In order to overcome these drawbacks, the use of embedded hydraulic pipes with a hot carrier fluid below the paved surfaces has been proposed in last decades. This circuit can be part of a Ground Source Heat Pump (GSHP) system. Despite a number of examples of this technology have been proposed, very few of them included the application of energy tunnels. This paper focuses on the thermal activation of a tunnel lining in relation to an application for bridge deck deicing. A theoretical case study along an Alpine road has been considered as representative of a common situation of alternated bridges and tunnels. The numerical results show that the thermal activation of the tunnel lining can provide enough heat to keep the paved surface unfrozen even in protracted periods of low external temperatures

DETERMINAZIONE DELLE CONDIZIONI OTTIMALI DI CONDIZIONAMENTO DEI TERRENI DURANTE LO SCAVO CON EPB TRAMITE SLUMP TEST

La nota descrive i risultati di una campagna di prove di consistenza (slump test), finalizzata alla determinazione speditiva delle condizioni ottimali di condizionamento del terreno nel caso dello scavo di gallerie con TBM-EPB. In particolare il lavoro si concentra sul confronto tra il comportamento di terreni di caratteristiche granulometriche diverse tra loro, indagando un campo più ampio rispetto a quanto attualmente disponibile in letteratura