Economic comparison of trenchless repair technology for aging gas pipeline network in cities
城市老旧燃气管网非开挖修复技术的经济性对比分析

摘要

城市老旧燃气管网因长期运行而存在泄漏、腐蚀和破损等问题，直接影响公共安全与能源利用效率。传统开挖修复方式虽能彻底更换管道，但施工周期长、成本高、交通干扰严重。非开挖修复技术凭借工期短、占地小和对市政环境影响低的优势，逐渐成为管网更新的重要选择。本文通过对比分析两种方式在直接成本、间接损失及长期效益上的差异，论证非开挖修复在经济性上具备显著优势，为城市燃气管网更新决策提供参考。

Abstract

Aging urban gas pipelines suffer from leakage, corrosion, and structural damage due to prolonged operation, directly impacting public safety and energy efficiency. While traditional trench excavation methods can completely replace pipelines, they are characterized by lengthy construction periods, high costs, and significant traffic disruption. Non-trench repair technology has emerged as a preferred solution for pipeline renewal due to its advantages of short construction duration, minimal land occupation, and low environmental impact on municipal infrastructure. This paper compares direct costs, indirect losses, and long-term benefits between the two approaches, demonstrating that non-trench repair offers notable economic advantages. The findings provide valuable insights for decision-making in urban gas pipeline renewal.