Tunnelling experiences of the largest EPB Shield to date for the Galleria Sparvo highway tunnel

Herrenknecht, Martin; Bäppler, Karin

doi:10.1201/b14769-168

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, the excavated material's behaviour should improve to the desired form through mixing with additives in a process called conditioning [5][6][7]. Conventional conditioning agents include a wide range of different chemicals that are used in the form of foam and polymers [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. The selection of the most suitable commercial products and the evaluation of the optimum conditioning design are based on the results of laboratory tests performed before the execution of the project, plus experiments on the environmental effects of these suggested designs [23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of foam application in providing required conditioning for EPB hard rock TBMs

Firouzei

Hassanpour

Peila

et al. 2023

Geomechanics and Tunnelling

View full text Add to dashboard Cite

Utilizing the earth pressure balancing technique on hard rock tunnel boring machines (TBMs) is an efficient way to overcome engineering geological hazards that disrupt the application of these machines. Considering that geomechanical and engineering geological conditions of soil and rock are dramatically different, proposing a suitable conditioning design for earth pressure balance (EPB) hard rock TBMs requires particular attention to the characteristics of the excavated material and ground conditions. In this paper, foam application providing a favourable support medium for EPB hard rock TBMs is evaluated based on the experience of the Tehran metro line 6 southern expansion sector project, using laboratory and actual data. TBM muck, with different water contents, was used as the test specimen after granulometry correction. The trend of changes in the workability of foam conditioned mix was obtained by performing 350 slump tests. The pressurized permeability cell test (PPCT), a testing device capable of applying high water pressures to the conditioned material, was used to evaluate the impermeability of workable mixes. Results indicate that although foam can efficiently increase the workability of dry and moistened specimens, the presence of a separated liquid phase in the test specimen disrupts its application; moreover, foam conditioned mix is permeable even against low water pressures.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Fig 9. The trend of changes in the slump value after adding foam to the specimens with 15 % water content…”

mentioning

confidence: 97%

Evaluation of foam application in providing required conditioning for EPB hard rock TBMs

Firouzei

Hassanpour

Peila

et al. 2023

Geomechanics and Tunnelling

View full text Add to dashboard Cite

show abstract

“…1. Fig.1 Schematic section of a Herrenknecht TBM-EPB machine (http://www.herrenknecht.com) [1] Analyses on ground movement due to tunneling by TBM or induced structural forces in the lining are necessary during the design stage. Among various analysis methods, Finite Element Method (FEM) is one of the most widely used tool for tunneling works.…”

Section: Introductionmentioning

confidence: 99%

Tunneling Simulation in Soft Ground Using Shell Elements and Grouting Layer

Lueprasert¹

2017

GEOMATE

View full text Add to dashboard Cite

ABSTRACT:With the advancement of computer sciences and researches on tunneling simulation in the past, the 3D finite element analysis of tunnel excavation by Tunnel Boring Machines (TBMs) has been extensively used over the last decade. Due to that the complicated construction sequences and relevant loads can be taken into account, complex interaction problems can then be performed. Many simulation techniques have been proposed depending on the assumptions used in the modeling. For modeling the tunnel lining, solid elements are commonly used due to the ratio between the width and thickness of the lining is not large. In addition, most studies focused on the ground deformation, not the lining forces. In the circumstance that the lining forces are essentially observed, the structural elements that directly provide the values are preferred. Therefore, this research attempts to propose the shell elements as tunnel lining together with the grouting layer in the analysis. The analysis results from the proposed method and the conventional one are compared and discussed in terms of ground deformation and lining forces together with the field measurement data. The results reveal that the simulation by the proposed method is sufficient and can reasonably reproduce the soil and lining responses.

show abstract

Tunnelling experiences of the largest EPB Shield to date for the Galleria Sparvo highway tunnel

Cited by 2 publications

References 0 publications

Evaluation of foam application in providing required conditioning for EPB hard rock TBMs

Evaluation of foam application in providing required conditioning for EPB hard rock TBMs

Tunneling Simulation in Soft Ground Using Shell Elements and Grouting Layer

Contact Info

Product

Resources

About