No document
Search & filter
Search for a publication
Search & filter
List of products by author: A. Bezuijen
-
A Design Framework for TBM Face Equilibrium in Permeable Ground
Abstract: support pressure is an abstract representation of the combined effects of partial excavation, ground reinforcement, and the different support elements. The use of closed-face tunnel boring machines (TBM) changed this perspective, as the magnitude of pressures acting on the excavation boundary could be controlled in a more direct way. The pressures stabilize the tunnel face while in front of the...
0,00 € -
Excess pore water pressures in front of a tunnel face when drilling in a semiconfined aquifer
Abstract: When drilling with a TBM (Tunnel Boring Machine) in saturated sand, excess pore water pressures occur in the sand in front of the TBM. The magnitude of these excess pore water pressures depends on the permeability of the sand, the drilling velocity, the layering of the soil. These excess pore water pressures will decrease the stability of the tunnel face and influence the plastering of that...
0,00 € -
Pile Tunnel Interaction: Literature Review and Data Analysis
Abstract: The underground space of densely populated cities contains deep foundations and tunnels. Considering the possibility that a new tunnel can be built close to existing piles it is necessary to assess the possible effects of that interaction. Most case studies have shown limited damage on pile supported structures; however, these constructions deal with great uncertainty as the mechanism of pile...
0,00 € -
Pile tunnel interaction: Pile settlement vs Ground settlements
Abstract: The underground space of densely populated cities contains parts of buildings, utility installations, deep foundations, tunnels, and deep excavations. It is possible, and increasing more probable, that new underground constructions will be built within proximity of existing pile foundations. This paper analyses how a new a framework for pile analysis, a modified version of the load transfer...
0,00 € -
Pressure Distribution in the Mixing Chamber of an EBP Shield
Abstract: The pressure distribution in the mixing chamber of an EPB shield, operating with foam for soil conditioning, quite often has a left-right asymmetry during drilling. The pressures are higher on the side where the cutter wheel is moving upwards. Recently the same phenomenon was found in computational simulations, but only when compressible muck was modelled. For compressible muck, the centre of...
0,00 € -
Soil pressures on both sides of the cutter wheel of an EPB-shield
Abstract: Soil pressures were measured on both sides of the cutter wheel of an EPB-shield during tunnelling in saturated sand, using foam for soil conditioning. The measured pressures are compared with the pressures at the pressure bulk head. The pressures are not purely hydrostatic but the results are also influenced by the yield stress in the foam. At the lowest positions, the sensors sometimes...
0,00 € -
TBM Pressure Models: Calculation Tools
Abstract: Mechanized tunnel construction in soft ground has evolved significantly over the last 20 years, especially on the matter of settlement control. This was achieved by guiding the TBM operation to control the main factors that induce soil displacements, namely the face pressure and the closure of the soil-lining void. Nowadays, TBMs can be operated within strict serviceability requirements....
0,00 €
