Ten years of bored tunnels in The Netherlands

Bakker, K.J.; Bezuijen, Adam

doi:10.1201/9780203879986.ch27

Cited by 8 publications

(4 citation statements)

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“…Soft soils with low stiffness and a high groundwater table are the dominant ground conditions in the Netherlands, and, particularly, saturated medium‐fine sandy soils are the usual ground conditions encountered when tunneling. ( 60,61 ) Tunnel boring is typically carried out in the Netherlands using closed shields such as slurry and earth pressure balance shields. These closed shields provide continuous support to the face during excavation.…”

Section: Example: Tunnel Face Instability Risk Modelmentioning

confidence: 99%

Capturing and Integrating Knowledge for Managing Risks in Tunnel Works

et al. 2012

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Risk-related knowledge gained from past construction projects is regarded as potentially extremely useful in risk management. This article describes a proposed approach to capture and integrate risk-related knowledge to support decision making in construction projects. To ameliorate the problem related to the scarcity of risks information often encountered in construction projects, Bayesian Belief Networks are used and expert judgment is elicited to augment available information. Particularly, the article provides an overview of judgment-based biases that can appear in the elicitation of judgments for constructing Bayesian Networks and the provisos that can be made in this respect to minimize these types of bias. The proposed approach is successfully applied to develop six models for top risks in tunnel works. More than 30 tunneling experts in the Netherlands and Germany were involved in the investigation to provide information on identifying relevant scenarios than can lead to failure events associated with tunneling risks. The article has provided an illustration of the applicability of the developed approach for the case of "face instability in soft soils using slurry shields."

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Section: Example: Tunnel Face Instability Risk Modelmentioning

confidence: 99%

Capturing and Integrating Knowledge for Managing Risks in Tunnel Works

et al. 2012

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“…The construction phase of a segmented tunnel is known to be critical, Bakker , Blom , Heijboer et al . and Bakker and Bezuijen . Mechanical forces are at a maximum during this phase, and it happens that lining segments are damaged (cracks, spalling and leakage) in this phase.…”

Section: Introductionmentioning

confidence: 99%

Analytical model for the beam action of a tunnel lining during construction

Talmon

Bezuijen

2011

Num Anal Meth Geomechanics

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SUMMARYMeasurements on a 14.5-m diameter bored tunnel have shown that the mechanised assembly of a segmented tunnel lining results in a permanent longitudinal bending moment in the tunnel lining. An analytical model for the beam action of the tunnel lining during the construction phase of bored tunnels is presented. The model incorporates many of the essentials in staged beam construction. It takes into account the influence of forces from the TBM, the loading of the tunnel lining by the grout in the liquid phase, and linear elastic properties of the tunnel lining and soil. Calculations are compared with measurements at the Groene Hart Tunnel (GHT), 20 km south of Amsterdam: the bending moment curve and vertical inclination of tunnel lining segments were compared. The measured bending moment curve is well reproduced. The measured vertical inclination of the lining segments is found to be governed by the beam action of the tunnel lining plus the influence of shear force in the lining.

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“…Soft soils with low stiffness and a high groundwater table are the dominant ground conditions in the Netherlands, and, particularly, saturated mediumfine sandy soils are the usual ground conditions encountered when tunneling. (Bakker and Bezuijen, 2009;Bezuijen and Talmon, 2009). Tunnel boring is typically carried out in the Netherlands using closed shields such as slurry and earth pressure balance shields.…”

Section: Example: Tunnel Face Instability Risk Modelmentioning

confidence: 99%

“…This grout injection is made at the rear section of the tunnel boring machine. With the current technologies employed in mechanized tunneling in urban areas, excessive volume loss is only likely to be only a problem where buildings are located directly above (Bakker and Bezuijen, 2009). Other relevant factors leading to excessive volume loss might appear during the construction stage as a consequence of uncertainties in the ground conditions, extraordinary events, shortcomings in the boring operations, as well as design flaws as shown in Fig.…”

Section: Excessive Volume Loss Leading To Settlement In Tunnels Bored...mentioning

confidence: 99%

Integrating knowledge for managing risk in infrastructure projects: the case of tunnel works

Cárdenas¹

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The model's added value was further assessed. According to the results of a questionnaire using a 5-point scale, the experts involved in the Sluiskil tunnel project fully agreed in that the developed risk models provide valuable information to assess risks in tunneling projects (score 4.0). Unanimously, the added value of the use of models was also highly scored as mean to set priorities of risk management measures (score 4.0). One expert indicated that in terms of risk identification, the use of models will be more helpful to less experienced professionals.x xi Table of ContentThanks .

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Ten years of bored tunnels in The Netherlands

Cited by 8 publications

References 1 publication

Capturing and Integrating Knowledge for Managing Risks in Tunnel Works

Capturing and Integrating Knowledge for Managing Risks in Tunnel Works

Analytical model for the beam action of a tunnel lining during construction

Integrating knowledge for managing risk in infrastructure projects: the case of tunnel works

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