A Study on the Ring Deflection According to Compaction of Buried Polyethylene Pipes

Seungcheol Baek; Seungwook Kim; Byounghan Choi; Sunhee Kim

doi:10.14481/jkges.2024.25.10.5

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2024 Vol.25, Issue 10 Next Page

A Study on the Ring Deflection According to Compaction of Buried Polyethylene Pipes 지중매설 폴리에틸렌관의 다짐도에 따른 관변형 연구

1 October 2024. pp. 5-10

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Abstract

Flexible pipes have the property of resisting external loads by utilizing the rigidity of the pipe and the surrounding ground, and have recently been in the spotlight because they are lighter in weight and have excellent durability compared to concrete pipes. In this study, the behavior characteristics of buried polyethylene pipe, a representative flexible pipe, were examined. Double-walled and multi-walled polyethylene pipes were used, and the structural behavior of the polyethylene pipe was evaluated based on a 5% deflection of the pipe diameter suggested in the design standards for flexible pipes. For the polyethylene pipe, the material properties of the pipe were identified through a ring stiffness test, and the behavior characteristics in the ground were reviewed through the simulation experiment of the buried polyethylene pipes. In addition, a finite element analysis model was developed based on the results of underground burial simulation experiments, and the behavior characteristics of polyethylene pipes according to backfill conditions were evaluated using the developed finite element analysis model and design equation. As a result of the study, it was confirmed that the capacity of the pipes and the compaction of the backfill are the main factors that determine the structural performance of the buried polyethylene pipe.

Keywords

Polyethylene pipe

Flexible pipe

Simulation test

Structural analysis

Backfill

연성관은 관의 강성과 주변 지반의 강성을 이용하여 외부하중에 저항하는 특성을 가지고 있으며, 기존의 콘크리트 관에 비해 중량이 가볍고, 내구성이 우수하기 때문에 최근 각광받고 있다. 이 연구에서는 대표적인 연성관인 폴리에틸렌 관을 대상으로 지중에서의 거동 특성을 검토하였다. 폴리에틸렌 관은 이중벽관과 다중벽관을 사용하였으며, 폴리에틸렌 관의 구조적 거동은 연성관의 설계기준에서 제시하고 있는 관 직경의 5% 변형을 기준으로 평가하였다. 폴리에틸렌 관은 원강성시험을 통해 관의 재료적 특성을 파악하고, 지중매설 모사실험을 통해 지중에서의 거동 특성을 검토하였다. 또한 지중매설 모사실험 결과를 토대로 유한요소해석모델을 개발하였으며, 개발한 유한요소해석모델과 설계식을 사용하여 지반조건에 따른 폴리에틸렌 관의 거동 특성을 평가하였다. 연구 결과 지중매설 폴리에틸렌 관은 관 자체의 성능과 주변 지반의 다짐 정도가 구조적 성능을 결정하는 주요 인자임을 확인하였다.

키워드

폴리에틸렌 관

연성관

모사실험

구조해석

되메움토

References

ASTM D 2412 (2021), Standard Test Method for Determination of External Loading Characteristics of Plastic Pipe by Parallel-Plate Loading, American Society for Testing and Materials.

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KDS 61 00 00, Sewer design standard, Ministry of Environment.

KS M ISO 9969 (2021), Thermoplastics pipes-Determination of ring stiffness, Korean standards association.

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10.11004/kosacs.2020.11.6.009

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10.11001/jksww.2012.26.6.907

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Seo, J. H., Lee, J. H., Yoo, J. H. and Kim, E. H. (2017), Structural behavior and design of polyethylene pipe buried underground, Journal of Korean Society for Advanced Composite Structure, Vol. 8, No. 3, pp. 37~45 (In Korean).

10.11004/kosacs.2017.8.3.037

Information

Publisher :Korean Geo-Environmental Society
Publisher(Ko) :한국지반환경공학회
Journal Title :Journal of the Korean Geo-Environmental Society
Journal Title(Ko) :한국지반환경공학회 논문집
Volume : 25
No :10
Pages :5-10
Received Date : 2024-08-13
Revised Date : 2024-08-21
Accepted Date : 2024-09-09
DOI :https://doi.org/10.14481/jkges.2024.25.10.5

Journal of the Korean Geo-Environmental Society ISSN:1598-0820(Print) 2714-1233(Online) 한국지반환경공학회 논문집

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