On the influence of face pressure, grouting pressure and TBM design in soft ground tunnelling

Kasper, Thomas; Meschke, Günther

doi:10.1016/j.tust.2005.06.006

Cited by 167 publications

(54 citation statements)

References 7 publications

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“…However, the effect of tail void grouting pressure is not taken seriously in these methods predicting surface settlement. Some studies on tail void grouting show that the grouting pressure induced a negative settlement (i.e., soil heave) at the end of the shield mainly based on numerical simulations [25][26][27][28], laboratory tests [29][30][31], and field investigation [32][33][34]. In addition, some scholars [35][36][37] have made an attempt using analytical methods to analyze the surface settlement induced by tail void grouting.…”

Section: Introductionmentioning

confidence: 99%

Analytical Method for Evaluating the Ground Surface Settlement Caused by Tail Void Grouting Pressure in Shield Tunnel Construction

Zhu

2018

Advances in Civil Engineering

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e tail void grouting is a key step in shield tunnel construction and has an important influence on the loading on the surrounding soil and on the resulting settlement. In order to estimate the ground surface settlement caused by tail void grouting pressure in tunnel construction, the loading on the surrounding soil is simplified as an expansion problem of the cylindrical cavity in semi-infinite elastic space. A simple analytical formula is deduced by using the virtual image technique and Fourier transform solutions. e effectiveness of the proposed method is verified by case studies. e effects of elastic modulus, tail void grouting pressure, tunnel radius, and tunnel depth on the ground surface heave are conducted. e results indicate that the computed results are in accordance with Ye's solution and it is more rational to consider the ground surface heave induced by tail void grouting pressure in the prediction of ground settlement due to shield excavation. Moreover, the ground surface heave owing to tail void grouting pressure resembled a Gaussian distributed curve. us, no matter the ground surface subsidence or ground surface heave can be predicted by means of adding the presented empirical formula to the Peck formula which cannot predict the ground surface heave. e ground surface heave decreases with an increase in elastic modulus. On the contrary, as the tail void grouting pressure and tunnel radius increase, the ground surface heave increases, respectively. e ground surface heave first steadily increases and then declines gradually with the tunnel depth increase.

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Section: Introductionmentioning

confidence: 99%

Analytical Method for Evaluating the Ground Surface Settlement Caused by Tail Void Grouting Pressure in Shield Tunnel Construction

Zhu

2018

Advances in Civil Engineering

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“…In the sectional direction, the ground movement induced by grouting pressure is assumed to be a cavity expansion process in an elastic half-plane. Verruijt [66] has given equations for calculating the deformation with uniform stress applied at the cavity boundary. The solution uses the complex variables to calculate the ground movement.…”

Section: Grouting Pressurementioning

confidence: 99%

Prediction of Ground Deformation during Pipe-Jacking Considering Multiple Factors

Ren

Shen

et al. 2018

Applied Sciences

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Pipe-jacking is a construction method widely used in pipeline constructions. Prediction of ground deformation induced by pipe-jacking, is important for safety and scheduling purposes. This paper presents an approach to predict ground deformation during pipe-jacking considering following factors: (i) bulkhead additive thrust; (ii) friction on jacking machine; (iii) grouting pressure; and (iv) ground loss. Mindlin's solution was used to calculate the ground deformation induced by bulkhead additive thrust and friction on the jacking machine. The shearing disturbance coefficient was adopted to evaluate the mitigation effect of shearing behavior on ground deformation. Verruijt's solution was used to simulate the effect of grouting pressure. Sagaseta's method was adopted to consider the ground loss induced by over-excavation. Subsequently, a three-dimensional analytical solution for ground deformation induced by pipe-jacking was obtained. A case study based on a pipe-jacking project undertaken in Jiangsu, China was analyzed to validate the proposed approach. The results indicated that the proposed approach was robust and could be implemented for future pipe-jacking projects.

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“…The annular gap between the segmented lining tube and the excavation boundary is assumed to be refilled with cement-based grouting material, modelled as a fully saturated two-phase material with a hydrating matrix phase, considering the evolution of stiffness and permeability of the cementitious grout [37] (see part (4) of Fig. 6).…”

Section: Modelling Of Support Measuresmentioning

confidence: 99%

A hybrid finite element and surrogate modelling approach for simulation and monitoring supported TBM steering

Ninić

Freitag

Meschke

2017

Tunnelling and Underground Space Technology

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription. AbstractThe paper proposes a novel computational method for real-time simulation and monitoring-based predictions during the construction of machine-driven tunnels to support decisions concerning the steering of tunnel boring machines (TBMs). The proposed technique combines the capacity of a process-oriented 3D simulation model for mechanized tunnelling to accurately describe the complex geological and mechanical interactions of the tunnelling process with the computational efficiency of surrogate (or meta) models based on artificial neural networks. The process-oriented 3D simulation model with updated model parameters based on acquired monitoring data during the advancement process is used in combination with surrogate models to determine optimal tunnel machine-related parameters such that tunnelling-induced settlements are kept below a tolerated level within the forthcoming process steps. The performance of the proposed strategy is applied to the Wehrhahn-line metro project in Düsseldorf, Germany and compared with a recently developed approach for real-time steering of TBMs, in which only surrogate models are used.

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On the influence of face pressure, grouting pressure and TBM design in soft ground tunnelling

Cited by 167 publications

References 7 publications

Analytical Method for Evaluating the Ground Surface Settlement Caused by Tail Void Grouting Pressure in Shield Tunnel Construction

Analytical Method for Evaluating the Ground Surface Settlement Caused by Tail Void Grouting Pressure in Shield Tunnel Construction

Prediction of Ground Deformation during Pipe-Jacking Considering Multiple Factors

A hybrid finite element and surrogate modelling approach for simulation and monitoring supported TBM steering

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