Field Test Study of the Artificial Ground-Freezing Method Subsurface Excavation Construction of Watered Sandy Stratum in Collapsible Loess Area

Joint Authors

Yang, Tong
Wang, Xueyan
Mei, Yuan
Zhao, Liangjie
Zhou, Dongbo
Liu, Yuanying
Gong, Hang

Source

Advances in Civil Engineering

Issue

Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-14, 14 p.

Publisher

Hindawi Publishing Corporation

Publication Date

2020-12-29

Country of Publication

Egypt

No. of Pages

14

Main Subjects

Civil Engineering

Abstract EN

Saturated sandy stratum often makes tunnel excavation exceedingly difficult owing to its high water content.

The artificial ground-freezing (AGF) method is an effective way to reduce the construction risks in such stratum; however, the AGF mechanism in the saturated sandy stratum of a collapsible loess area still lacks sufficient research.

Based on field tests and numerical simulations, this study investigates the regularity of the temperature development, frost heave, and thaw subsidence distribution during the cross passage construction of a saturated sandy stratum in a collapsible loess area, using the AGF method.

The results showed that the inward development rate of the frozen soil wall in the saturated sandy stratum was faster than its outward development rate.

The gradient of the soil cooling curve was positively related to the longitudinal depth of the cross passage.

The thickness of the frozen soil wall calculated by the slowest development rate of the frozen soil was conservative.

The application of the pressure relief hole was beneficial to the release of the frost-heaving force and the control of the frost-heaving displacement.

The pressure gauge pressure increase could be used as an identifier for the closure of a frozen soil wall.

After excavation, the inner wall of the cross passage moved toward the inner space of the passage.

American Psychological Association (APA)

Mei, Yuan& Zhao, Liangjie& Wang, Xueyan& Zhou, Dongbo& Yang, Tong& Liu, Yuanying…[et al.]. 2020. Field Test Study of the Artificial Ground-Freezing Method Subsurface Excavation Construction of Watered Sandy Stratum in Collapsible Loess Area. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1122468

Modern Language Association (MLA)

Mei, Yuan…[et al.]. Field Test Study of the Artificial Ground-Freezing Method Subsurface Excavation Construction of Watered Sandy Stratum in Collapsible Loess Area. Advances in Civil Engineering No. 2020 (2020), pp.1-14.
https://search.emarefa.net/detail/BIM-1122468

American Medical Association (AMA)

Mei, Yuan& Zhao, Liangjie& Wang, Xueyan& Zhou, Dongbo& Yang, Tong& Liu, Yuanying…[et al.]. Field Test Study of the Artificial Ground-Freezing Method Subsurface Excavation Construction of Watered Sandy Stratum in Collapsible Loess Area. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-14.
https://search.emarefa.net/detail/BIM-1122468

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references

Record ID

BIM-1122468