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Broere, W. (author), Zhang, X. (author)Daily and seasonal deformation behavior of immersed tunnels potentially impacts the structural integrity. In this study, distributed optical fiber sensors (DOFS) are used to instrument both dilation and immersion joints of the Heinenoordtunnel, an immersed tunnel in the Netherlands. This DOFS system proves capable of measuring joint opening and...conference paper 2023
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- Gaspari, Giuseppe (author), Broere, W. (author) conference paper 2022
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Glab, K.B. (author), Wehrmeyer, G. (author), Thewes, M (author), Broere, W. (author)A significant part of the energy consumed during the tunnelling process of Earth Pressure Balanced (EPB) Tunnel Boring Machines (TBMs) is related to the main drive, consisting of a set of motors driving the rotation of the cutting wheel. An energy efficient EPB design requires the optimization of the main drive to avoid over- or under powering...conference paper 2022
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de Haas, K. (author), Berkhout, B (author), Dekker, H.R.E. (author), Broere, W. (author)Determining the scope of (structural) renovation of aging tunnels is a complicated task and modular renovation is becoming increasingly necessary. The COB Tunnel Programme aims at developing the knowledge necessary to renovate these tunnels in a modular fashion, to reduce hindrance as much as possible. Part of this program is the development of...conference paper 2022
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Zhang, X. (author), Broere, W. (author)This paper focuses on the settlement analysis of immersed tunnel on soft ground. Even under careful design, immersed tunnel may have problems of excessive settlement and the resulting concrete cracking or structure leakage during operation period. Yongjiang Tunnel, the first immersed tunnel on soft ground in mainland China, is taken as a case...conference paper 2019
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de Haas, K. (author), Broere, W. (author), Dekker, H. (author), van Gelder, L. (author)The COB is The Netherlands Knowledge Centre for Underground Construction and Underground Space. Over sixty organisations, from government, industry and knowledge institutes, work together to learn and develop smart solutions regarding tunnels. This network has developed a long-term vision on tunnels in The Netherlands. As a result, nineteen...conference paper 2019
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Gavin, Kenneth (author), Broere, W. (author), Kovacevic, M. S. (author), de Haas, K. (author)In this paper we present issues related to the performance of immersed tube tunnels in the Netherlands. A range of issues are experienced for the ageing structures including long-term settlement at tunnel joints and consequent leakage. Because of the age of these structures some important aspects are often unknown thus creating uncertainty...conference paper 2019
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Lundberg, AB (author), Broere, W. (author), Dijkstra, J. (author)An instrumented model pile has been realized to study the displacement pile installation effects in sand in physical model tests. The system includes a model pile, instrumented with axial and horizontal contact stress sensors, and a corresponding calibration apparatus. The development of the instrumented model pile, including numerical analysis...conference paper 2018
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Rheza Rahadian, Rheza (author), van der Woude, Sallo (author), Wilschut, D. (author), Blom, C.B.M. (author), Broere, W. (author)During inspections of several immersed tunnels in the Netherlands, damage of immersion joints has been observed. In some cases the Gina seal has moved inwards from its original location, and in other cases a permanent elongation of the entire tunnel structure has been measured. For both cases it has been hypothesised that a seasonal expansion...conference paper 2018
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Broere, W. (author), Dijkstra, J. (author), Ottolini, M (author)A cost effective method to measure pore water pressures in mixed granular media is described using 40 miniature MEMS pore pressure transducers. High accuracy in a single point is exchanged for lower accuracy full field measurements adjacent to the strongbox wall. The system is easily de-aired and calibrated due to the fact that the transducers...conference paper 2018
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Vu, M.N. (author), Broere, W. (author), Bosch, J.W. (author)In estimating the effect of tunnelling on existing buildings, the value of volume loss, which is often determined by experience, is an important input parameter. This paper proposes a method to predict the volume loss for various cover-to-diameter C/D ratios in case of shallow tunnelling. By applying a number of (empirical) relation, such as the...conference paper 2017
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Vu, M.N. (author), Broere, W. (author), Bosch, J.W. (author)The extent of the influence zone affected by shallow tunnelling depends on the value of volume loss which normally represents the amount of over-excavation and stress changes induced in the soil. This paper combines upper and lower estimates of volume loss for different soft soils and cover-to-diameter ratios in order to identify the extent of...conference paper 2017
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- Vu, M.N. (author), Broere, W. (author), Bosch, J.W. (author) conference paper 2016
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Vu, M.N. (author), Broere, W. (author), Bosch, J.W. (author)The extent of the influence zone affected by tunnelling depends on the amount of over-excavation and stress changes induced in the soil, normally represented as a value of volume loss. This paper combines upper and lower estimates of volume loss for different soil conditions and cover-to-diameter ratios in order to identify the zones around the...conference paper 2016
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Vu, M.N. (author), Broere, W. (author), Bosch, J.W. (author)Assessing the impact of underground construction on existing<br/>structures in urban areas is an important topic during design. In this paper, the extent of the effect area due to tunnelling is estimated, where existing foundations are influenced based on the investigation of surface and subsurface settlements. The extent of the areas where...conference paper 2016
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Salauddin, M. (author), Broere, A. (author), Van der Meer, J.W. (author), Verhagen, H.J. (author), Bijl, E. (author)A new and symmetrical single layer armour unit, the crablock, has been designed in the UAE. One breakwater was reconstructed with crablock, but very limited testing had been performed. Just to become more acquainted with this new unit, pre-competitive research at a university has been performed, which is the subject of this paper. Being a new...conference paper 2015
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Spruit, R. (author), Van Tol, F. (author), Broere, W. (author)If a calamity with a retaining wall occurs, the impact on surrounding buildings and infrastructure is at least an order of magnitude more severe than without the calamity. In 2005 and 2006 major leaks in the retaining walls of underground stations in Amsterdam and Rotterdam occurred. After these cases had been thoroughly studied it was concluded...conference paper 2015
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Van Dalen, J.H. (author), Bosch, J.W. (author), Broere, W. (author)Flow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process...conference paper 2015
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Spruit, R. (author), Van Tol, F. (author), Broere, W. (author)If a calamity with a retaining wall occurs, the impact on surrounding buildings and infrastructure is at least an order of magnitude more severe than without the calamity. In 2005 and 2006 major leaks in the retaining walls of underground stations in Amsterdam and Rotterdam occurred. After these cases had been thoroughly studied it was concluded...conference paper 2015
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Flow processes, taking place during the concreting of diaphragm wall panels (D-wall panels), are of great importance for the quality of the wall. During this phase, the bentonite, present in the excavated trench, should be completely replaced by concrete in a controlled way. In literature several cases are described in which this process...conference paper 2015