PCCP砂浆保护层耐久性能的试验方法研究进展及改进方案探讨-《混凝土与水泥制品》杂志社

PCCP砂浆保护层耐久性能的试验方法研究进展及改进方案探讨

Research progress and improvement scheme discussion on durability testing methods for the mortar protective layer of PCCP

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关键词：

预应力钢筒混凝土管（PCCP）；砂浆保护层；耐久性能；矿物掺合料；试验方法；改进方案

Key words：

Prestressed concrete cylinder pipe (PCCP); Mortar protective layer; Durability; Mineral admixture; Testing method; Improvement scheme

刊期：

2026年第2期

DOI：

10.19761/j.1000-4637.25030139

文章编号：

基金项目：

水利部重大科技项目（SKS-2022111）；流域水循环模拟与调控国家重点实验室自主研究课题项目（SKL2024YJTS14）。

作者：

窦铁生，牛文龙*，夏世法，李萌

单位：

中国水利水电科学研究院，北京 100038

摘要

摘要：预应力钢筒混凝土管（Prestressed concrete cylinder pipe，PCCP）砂浆保护层的耐久性能直接影响管道的长期安全运行，但现有试验方法大多因忽略生产工艺、内外荷载及多环境耦合作用，难以真实反映实际工程需求。通过分析PCCP砂浆保护层耐久性能的影响因素，总结了4种现有PCCP砂浆保护层的耐久性能试验方法（砂浆标准试件法、砂浆内裹钢筋法、PCCP缩尺试验、PCCP原管检测）。基于此，为解决现有试验方法在成型工艺、内水压力、覆土荷载等方面存在的设计缺陷，提出了适用于PCCP缩尺试验和PCCP原管试验的装置和方法，可为PCCP耐久性能试验设计提供技术参考。

Abstract: The durability of the mortar protective layer of prestressed concrete cylinder pipe (PCCP) directly affects the long-term safe operation of the pipeline. However, most existing testing methods ignore the production process, internal and external loads, and multi-environmental coupling effects, making it difficult to truly reflect the actual engineering needs. By analyzing the influencing factors of the durability of mortar protective layer of PCCP, four existing durability testing methods for mortar protective layer of PCCP were summarized, including mortar standard specimen method, mortar wrapped steel reinforcement method, PCCP scale testing, and PCCP original pipe detection. Based on this, in order to address the design deficiencies of existing testing methods in terms of forming processes, internal water pressure, and soil cover loads, corresponding devices and methods suitable for PCCP scale testing and PCCP original pipe testing are proposed, which can provide technical reference for the design of PCCP durability testing.

结论

（1）适量的矿物掺合料能够提升PCCP砂浆保护层的力学性能，改善孔结构。高温蒸养可使PCCP砂浆保护层的早期密实度快速提升，但长期抗渗性能弱于标准养护。Cl-、SO42-等侵蚀性离子是造成PCCP砂浆保护层性能劣化的主要原因之一。
（2）现有PCCP砂浆保护层的耐久性能试验方法可分为4大类：砂浆标准试件法、砂浆内裹钢筋法、PCCP缩尺试验、PCCP原管检测，其试验方法各有侧重，但均存在一定的测试偏差，难以真实反映PCCP生产工艺、内水压力、外部土荷载等多因素耦合作用的影响。
（3）本文针对PCCP缩尺试验、PCCP原管试验装置提出了相应的改进方案。其中，改进的PCCP缩尺试验装置有效解决了砂浆成型工艺、内水压力问题。改进的可拆卸钢带的PCCP原管试验装置，有效考虑了内、外荷载与环境因素的耦合作用，有效解决了试验数量少、成本高的问题。

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引用本文

窦铁生,牛文龙,夏世法,等.PCCP砂浆保护层耐久性能的试验方法研究进展及改进方案探讨[J].混凝土与水泥制品,2026(2):45-50,56.

DOU T S,NIU W L,XIA S F,et al.Research progress and improvement scheme discussion on durability testing methods for the mortar protective layer of PCCP[J].China Concrete and Cement Products,2026(2):45-50,56.

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