CAJ | 학술논문

为了更好地保障长输管道的安全稳定运行，针对长输管道当中的跨越结构进行了应力分析与计算。基于管道跨越结构其结构的特殊性，极容易受到断层、土体塌陷等地质灾害的影响。因此建立了跨越段埋地管道与土壤相互作用的有限元力学模型，分析了30°、40°、50°、60°跨越结构和不同范围土体发生沉降时，管道的应力变化情况。结果显示，当跨越结构中斜管段的角度确定后，便可计算出相应的安全沉降长度；当斜管段角度为50°时，沉降长度控制在13.6 m以内，可保证跨越结构不发生塑性变形。通过研究为管道跨越段的安全设计提供了理论依据，该方法可应用在类似的管道跨越结构的应力设计当中。
위료경호지보장장수관도적안전은정운행，침대장수관도당중적과월결구진행료응력분석여계산。기우관도과월결구기결구적특수성，겁용역수도단층、토체탑함등지질재해적영향。인차건립료과월단매지관도여토양상호작용적유한원역학모형，분석료30°、40°、50°、60°과월결구화불동범위토체발생침강시，관도적응력변화정황。결과현시，당과월결구중사관단적각도학정후，편가계산출상응적안전침강장도；당사관단각도위50°시，침강장도공제재13.6 m이내，가보증과월결구불발생소성변형。통과연구위관도과월단적안전설계제공료이론의거，해방법가응용재유사적관도과월결구적응력설계당중。
To better protect the safe and stable operation of long-distance pipeline , the stress on crossover structure of long-distance pipeline was analyzed and calculated .Based on the particularity of its structure , the crossover structure is extremely vulnerable to fault , soil collapse and other geological disasters .Therefore a finite element me-chanical model of interactions between the pipeline and soil in the crossover segments of buried pipelines was estab -lished, and a detailed analysis on the stress changes of pipeline was conducted when the crossover structure adopted 30 , 40 , 50 and 60 degrees respectively and the settlement occurred in different range of soil mass .The results showed that the corresponding safe settlement length can be calculated when the angle of inclined pipeline in cross -over structures is determined .The settlement length can be controlled within 13.6m, and the plastic deformation will not happen in crossover structures when the angle of inclined pipeline is 50 °.It provides a theoretical basis for the safety design of the crossover segment on the buried pipeline , and the method can be applied in the stress de-sign of pipeline with similar crossover structure .