• norsk
    • English
  • English 
    • norsk
    • English
  • Login
View Item 
  •   Home
  • Fakultet for ingeniørvitenskap (IV)
  • Institutt for bygg- og miljøteknikk
  • View Item
  •   Home
  • Fakultet for ingeniørvitenskap (IV)
  • Institutt for bygg- og miljøteknikk
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

TBM Operation and Performance at the Silver Lake Project

Sletta, Ivar
Master thesis
View/Open
769284_FULLTEXT01.pdf (Locked)
769284_COVER01.pdf (Locked)
URI
http://hdl.handle.net/11250/233305
Date
2014
Metadata
Show full item record
Collections
  • Institutt for bygg- og miljøteknikk [4484]
Abstract
This thesis is written in cooperation with Herrenknecht. The main objectives of this thesis were to: Compare recorded TBM performance in soft ground with results from laboratory tests designed to estimate performance. Evaluate the influence and usefulness of soil conditioning additives, which are designed to reduce wear and torque and thus improve performance.The research was conducted by first doing a field study, which included recording essential TBM performance data, collecting soil samples and obtaining valuable knowledge from experienced people working on site. The samples have later been tested in the laboratory, and the recorded data has been processed. Literature studies have been used to discuss and better understand the results. It must be emphasized that this research is based on performance data from less than 90 meters of TBM tunneling. On the other hand, the documentation from this segment is very high, and all performances are based on a big amount of data.The two main laboratory tests are the Soil Abrasion Test (SATTM) and the Soft Ground Abrasion Test (SGAT). Other tests performed are grain size distribution analysis and XRD mineralogy analysis.Tests have shown that moisture content of soil samples collected for this thesis, and thus its compactibility can influence the soil abrasivity by as much as 500 %. A result of this high moisture influence is that the SGAT seems to have a better ability to predict TBM performance than SATTM.There is a clear correlation between recorded weight loss, torque and thrust from the SGAT tests, which increases the reliability of the test. Results from this work do indicate that results from the SGAT can be used to predict in-situ TBM performance. Adding foam to the sample reduces weight loss, torque and thrust. A reduction in abrasion of 60 % has been achieved, but this influence is very dependent on the soil and its moisture content and compactibility.
Publisher
Institutt for bygg, anlegg og transport

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit
 

 

Browse

ArchiveCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsDocument TypesJournalsThis CollectionBy Issue DateAuthorsTitlesSubjectsDocument TypesJournals

My Account

Login

Statistics

View Usage Statistics

Contact Us | Send Feedback

Privacy policy
DSpace software copyright © 2002-2019  DuraSpace

Service from  Unit