Tunnels and tunnelling
Behaviour of long structures in response to tunnelling
... This paper presents observations of the response of long structures when exposed to tunnelling activities in London Clay. The type of structures varied from a 100 years old masonry arch tunnel to a more modern ...
9
Twin-tunnelling-induced changes to clay stiffnesses
... where tunnels are constructed sequentially and within a close proximity are referred to as ‘Twin- ...of tunnelling volume ...the tunnels and the support pressure within the ...
25
Evaluation of innovative sprayed concrete lined tunnelling
... SCL tunnels in London Clay. The performance of the tunnelling method in controlling ground movements, with a volume loss of ...SCL tunnelling in London ...general, tunnels with higher volume ...
13
Twin-tunnelling-induced ground movements in clay
... The data presented in the previous sections for all the tests have been re-plotted to provide further insight into overall settlement patterns. The apparent volume loss solely due to the second tunnel construction has ...
11
Models for the analysis of tunnelling construction processses
... The belt conveyor system is used generally in combination with the tunnel boring machine (TBM) excavation method, and one of the main reasons it is used is because it can transport a great amount of muck relatively fast. ...
185
Behaviour of long structures in response to tunnelling
... This paper presents observations of the response of long structures when exposed to tunnelling activities in London Clay. The type of structures varied from a 100 years old masonry arch tunnel to a more modern ...
11
General risks for tunnelling projects: an overview
... Abstract. Tunnels are indispensable when installing new infrastructure as well as when enhancing the quality of existing urban living due to their unique characteristics and potential ...of tunnels, ...
9
Twin-tunnelling-induced changes to clay stiffness
... where tunnels are constructed sequentially and within a close proximity are referred to as ‘Twin- ...of tunnelling volume ...the tunnels and the support pressure within the ...
25
Stability of underground tunnelling using relaxation techniques
... shield tunnelling process. There are many ways that the construction of tunnels in soft soils can be completed ranging from hand excavation all the way to the tunnel boring machines (TBM) which utilise ...
106
A centrifuge modelling study of the response of piled structures to tunnelling
... The experimental package developed by Zhou et al. (2014) to model the tunneling process under greenfield and plane-strain con- ditions was used. This centrifuge package includes the centrifuge strong box, soil, model ...
16
A concept for a superconducting tunnelling junction based spectrograph
... reduce the polarization effects between dispersing elements suf- fered in cross-dispersed spectrographs. Alternatively, a non-echelle spectrograph could be feasible, with dichroics splitting the optical into two beams ...
12
Analysis of pre vault tunnelling interaction with buildings
... of tunnelling effects on buildings is important to confirm the viability of new tunnelling projects and reassure building owners of the possible level of damage, whilst avoiding excessive ...
49
Risk Analysis Methodology for Road Tunnels and Alternative Routes
... Widespread development and application of road tunnel risk assessment methodologies has begun after the EU issued a Directive on minimum safety requirements for road tunnels 2004/54/EC [2], also known as the “Road ...
11
Evaluating Market Benefits of Transportation Tunnels—The Carmel Tunnels as a Case Study
... and tunnels are specifi- cally important with regards to climate ...of tunnels in Israel as a solution for deal- ing with the general warming and dryness ...
14
The Types of Tunnels Maintenance in Umbrella Arch Method
... falling, tunnel faces’ breaking and landslides. In this strategy at first some holes will be drilled in a semi-circular pattern at a high point of the tunnel and around the tunnel crown. Putting some steel tubes into ...
7
Resonant tunnelling and negative differential conductance in graphene transistors
... exploit the multi-valued form of the current-voltage character- istics. The additional functionality provided by resonant tunnel- ling is not available in graphene ‘barristors’ 23 in which the current flow arises from ...
5
Moving Load Analysis of Submerged Floating Tunnels
... To have a closer look at the variation of the modes vibration frequencies in Figure 9, the change in the frequency of first mode is depicted for the case of k=0 and k=50 KN/m/m as function of the tunnel length. The ...
8
The effect of pretensioning in the rockbolts on the displacement around tunnels
... In this research the rockbolts which are located around the tunnel with the mentioned specifications are changed to prestressed rockbolts and their results are evaluated. So at first the tunnel is analysed without ...
6
Les tunnels ont ils des bouches ?
... Do tunnels have bouches (in French) ? Mainly, this article aims at depicting “the semantic identity” of the French noun bouche ...do tunnels have bouches ...
18
Enhancing the piston effect in underground railway tunnels
... undesirable pressure effects. Cross et al. (2015) considered the air flows and drag generated in high blockage ratio underground railways, finding that increasing the blockage ratio by 30% will double the air flow but ...
11