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Article

Study on the Effectiveness of Reinforcing Bar Insertion Work with a Circular Pipe

1
Department of Civil Engineering, Tokai University, 4 Chome-1-1 Kitakaname, Hiratsuka 259-1207, Kanagawa, Japan
2
Graduate School, Tokai University, 4 Chome-1-1 Kitakaname, Hiratsuka 259-1207, Kanagawa, Japan
*
Author to whom correspondence should be addressed.
Geotechnics 2025, 5(3), 55; https://doi.org/10.3390/geotechnics5030055 (registering DOI)
Submission received: 20 June 2025 / Revised: 30 July 2025 / Accepted: 7 August 2025 / Published: 9 August 2025

Abstract

It is an urgent issue for preventing slope failure caused by increasingly severe earthquakes and heavy rain. As a conventional construction method, reinforcing bar insertion work uses the tensile force of the core bar to integrate multiple core bars and pressure plates. Meanwhile, landslide deterrence piles are a construction method in which steel or concrete piles are constructed below the slope, and the rigidity of the piles is used to resist slope failure. In this study, these methods are combined to propose a reinforcing bar insertion work that uses pipes as a construction method. The pipes are not embedded in the immovable layer and are not connected to the reinforcing bar insertion work; therefore, the construction is expected to be simple. Two series of model experiments—a lift-up experiment and a water sprinkling experiment—were performed. Through the lift-up experiment, the effectiveness of the proposed method against static load was confirmed, and the evaluation formula of the load applied to the core bar was proposed. Through the water sprinkling experiment, the effectiveness against rainfall was confirmed, that is, the time until slope failure was extended by the proposed method.
Keywords: geotechnical engineering; model test; slope; countermeasure geotechnical engineering; model test; slope; countermeasure

Share and Cite

MDPI and ACS Style

Fujiwara, K.; Wang, L. Study on the Effectiveness of Reinforcing Bar Insertion Work with a Circular Pipe. Geotechnics 2025, 5, 55. https://doi.org/10.3390/geotechnics5030055

AMA Style

Fujiwara K, Wang L. Study on the Effectiveness of Reinforcing Bar Insertion Work with a Circular Pipe. Geotechnics. 2025; 5(3):55. https://doi.org/10.3390/geotechnics5030055

Chicago/Turabian Style

Fujiwara, Kakuta, and Lichao Wang. 2025. "Study on the Effectiveness of Reinforcing Bar Insertion Work with a Circular Pipe" Geotechnics 5, no. 3: 55. https://doi.org/10.3390/geotechnics5030055

APA Style

Fujiwara, K., & Wang, L. (2025). Study on the Effectiveness of Reinforcing Bar Insertion Work with a Circular Pipe. Geotechnics, 5(3), 55. https://doi.org/10.3390/geotechnics5030055

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