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2025 Vol.26, Issue 11 Preview Page
A Numerical Study on Stress Variation in the Surrounding Ground of a District Heating Pipe due to Ground Degradation

수치해석을 이용한 열수송관 주변지반 열화로 인한 응력변화에 관한 연구

Jaemo Kang1
,
Sangyun Kim2
,
Heesu Kim3
,
Hoki Ban4*
강 재모1
,
김 상윤2
,
김 희수3
,
반 호기4*
1Research Fellow, Dept. of Geotechnical Engineering Research Intelligent Geofusion Group, Korea Institute of Civil Engineering and Building
2Ph.D. Student, Dept. of Civil Engineering, Kangwon National University
3Postdoctoral Researcher, Dept. of Civil Engineering, Kangwon National University
4Professor, Dept. of Civil Engineering, Kangwon National University
*Corresponding Author
1 November 2025. pp. 43-50
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Abstract

To elucidate the behavior of district-heating pipes buried beneath road pavements—key elements of urban infrastructure—we performed numerical analyses with PLAXIS 2D, varying the burial-depth ratio (H/D), pipe diameter (D), and degree of backfill degradation. Pipe-soil contact pressure and hoop stress were evaluated. Results show that increasing burial depth reduces both stresses overall; the contact pressure reaches a maximum at the crown and decreases along the shoulders to a minimum near the springline. Larger pipe diameter and higher backfill degradation further lower the stress levels. Thus, the pipe response is strongly governed by the relative stiffness and confinement of the surrounding soil, highlighting the need for appropriate burial depth and sustained backfill properties.

Keywords
District-heating pipe
Hoop stress
Ground degradation
Numerical analysis

도시 기반 시설의 핵심 구성 요소인 매설관 중 도로포장 하부에 매설된 열수송관의 거동을 규명하기 위해 매설깊이비(H/D), 매설관 직경(D), 되메움층의 열화율을 변수로 설정하여 매설관과 주변 토체 간의 상호 응력, 후프응력을 상용지반해석프로그램인 Plaxis 2D를 통해 분석하였다. 분석결과 매설깊이가 증가할수록 두 응력은 전반적으로 감소하였고 매설관과 토체 간의 응력은 크라운에서 최대값을 보인 뒤 어깨면을 따라 스프링라인에서 최소화됨을 확인하였다. 또한 매설관의 직경과 되메움층의 열화율에 따라 응력이 저하됨을 확인하였다. 따라서 매설관의 거동은 주변 토체의 상대강성과 구속특성에 영향을 크게 받으며, 적정 매설 깊이의 선정과 되메움층의 물성 관리가 필수적이다.

키워드
열수송관
후프응력
지반열화
수치해석
References
1

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2

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6

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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 26
  • No :11
  • Pages :43-50
  • Received Date : 2025-10-17
  • Revised Date : 2025-10-20
  • Accepted Date : 2025-10-26
  • DOI :https://doi.org/10.14481/jkges.2025.26.11.43
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