Sökning: "överborrning"

Hittade 2 uppsatser innehållade ordet överborrning.

1. 1. Study of a new method to measure the stresses in rock by image technology : Use of sawn slots and DIgital Image Correlation

   Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Geoteknologi

   Författare :Patrik Emanuelsson; [2018]
   Nyckelord :Digital Image Correlation; Numerical modelling; Stress measurement; Sawn slots;

   Sammanfattning : In rock constructions and mining it is important to know the current stress situation in the rock due to safety and construction reasons. Two of the widely used stress measurement methods are overcoring and hydraulic fracturing. Both methods are expensive, need new boreholes, and are complex and time consuming. LÄS MER

3. 2. Pore pressures and settlements generated from two different pile drilling methods

   Master-uppsats, KTH/Jord- och bergmekanik

   Författare :Rasmus Ahlund; Oscar Ögren; [2016]
   Nyckelord :DTH; bored piles; pore pressure; settlements; over-drilling; sänkhammarborrning; borrade pålar; portryck; sättningar; överborrning;

   Sammanfattning : For piling works in sensitive soil, especially in inner city projects, it is essential to be aware of the available methods and to choose the most suitable method to minimize the risk of damaging existing buildings or endanger the workers at the construction site. Down-the-hole drilling of piles is a relatively safe method and can be separated into drilling with air powered hammers and water powered hammers. LÄS MER