Modeling excavation chamber of EPB tunnel boring machine by discrete element method

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

Sheykhi Arjmand; Refahi Arash; Samimi Namin Farhad

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: AUT Journal of Civil Engineering Year:2025 | Volume:9 | Issue:1 Page(s): 65-76

Download Full-Text

View:

Download:

Cites:

Information Journal Paper

Title

Modeling excavation chamber of EPB tunnel boring machine by discrete element method

Author(s)

Sheykhi Arjmand | Refahi Arash | Samimi Namin Farhad | Issue Writer Certificate

Keywords

EPB tunnel boring machine

discrete element method

Particle flow code

Settlement

Abstract

Earth Pressure Balance (EPB) tunnel boring machines are widely utilized for the excavation of subway tunnels. These machines leverage the pressure generated by the excavated materials within the excavation chamber to stabilize the tunnel face. The pressure in the excavation chamber is modulated by varying the speed of the screw conveyor, making the precise control of this rotation speed critically important. Such adjustments facilitate the management of the tunnel face and influence the overall Settlement of the tunnel structure. This study models the tunnel excavation of Tabriz Metro Line 2, employing an EPB shield that operates under earth pressure conditions. The excavated material is accumulated in a chamber located behind the cutter-head, which generates the requisite pressure at the work face. This pressure is regulated through the screw conveyor mechanism. The simulation was conducted using a three-dimensional Particle flow code based on the discrete element method. The findings indicate that when the pressure at the face is decreased to 50% of the maximum pressure exerted by the horizontal jacks of the shield drive, significant and hazardous ground surface Settlements occur. Conversely, at elevated pressures, a consistent Settlement of 1.9 cm was recorded. Additionally, a reduction in the cutter-head rotation speed from 2 rpm resulted in a decline of the work face, while an increase in speed corresponded with the same 1.9 cm Settlement. The discrete element method effectively models the drilling process. The validity of the modeling outcomes was corroborated by data acquired from instrumentation.

Multimedia

No record.

Cites

No record.

References

No record.

Cite

Related Journal Papers

No record.

Related Seminar Papers

No record.

Related Plans