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堆石混凝土高拱坝施工期温度指标变化研究
基金项目(Foundation): 国家自然科学基金重点项目(52039005);国家自然科学基金项目(52209161); 中央高校基本科研业务费专项资金资助(2025MS070)
邮箱(Email): demyang@163.com;xxrong@ncepu.edu.cn
DOI:
发布时间: 2026-09-28
出版时间: 2026-09-28
网络发布时间: 2026-09-28
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摘要:

【目的】堆石混凝土(Rock-Filled Concrete, RFC)筑坝技术逐步迈入高坝建设领域。针对RFC高坝尤其是高拱坝展开现场温度监测与分析研究不仅能够深化对RFC高坝温度场演化规律的认识,保障工程质量,还可为其他RFC高坝的设计施工提供重要参考。【方法】基于此,对永丰水库RFC高拱坝(83.0m)施工期的坝体温度进行了全程跟踪监测,重点对106个RFC测点和102个自密实混凝土(Self-Compacting Concrete, SCC)测点的监测数据与关键指标进行了分析。【结果】结果显示,RFC测点的水化热温升与最大温升速率均值分别为12.14℃和0.68℃/h,低于SCC测点的15.26℃和1.05℃/h,显著低于常态混凝土测点的26.30℃和6.21℃/h;RFC与SCC测点入仓温度与峰值温度受环境温度影响,均呈现出季节性变化规律;布设在代表性区域内的RFC与SCC测点的监测结果较为稳定,且温度水平相对较高,具有较好的代表性。【结论】在不采取相关温控措施时,RFC与SCC的入仓温度与峰值温度受浇筑期间的环境温度的显著影响,呈线性相关关系;现场实测温度指标,可结合前述回归公式,采用3σ准则进行异常判别。研究成果可为永丰RFC高拱坝及同类型工程的设计施工提供参考与依据。

Abstract:

[Objective] The dam construction technology using Rock-Filled Concrete (RFC) has gradually entered the field of high dam construction. Conducting on-site temperature monitoring and analysis on RFC high dams, especially high arch dams, can not only deepen the understanding of the temperature field evolution of RFC high dams, ensure engineering quality, but also provide important references for the design and construction of other RFC high dams. [Methods] Accordingly, a full-process tracking monitoring of the dam body temperature was conducted during the construction period of the Yongfeng RFC high arch dam (83.0m in height). The analysis focused on monitoring data and key indices collected from 106 RFC measuring points and 102 Self-Compacting Concrete (SCC) measuring points. [Results] Research results indicate that the mean of hydration temperature rise and maximum temperature rise rate at RFC measuring points are 12.14℃ and 0.68℃/h, respectively. These values are lower than the 15.26℃ and 1.05℃/h observed at SCC measuring points, and significantly lower than the 26.30℃ and 6.21℃/h recorded at conventional vibrated concrete measuring points. Both RFC and SCC measurement points exhibit seasonal variations in placement temperatures and peak temperatures, influenced by ambient temperature. Monitoring results from representative regions demonstrate stable and relatively high temperature levels at both RFC and SCC measurement points, indicating good representativeness. [Conclusion] In the absence of temperature control measures, the placement and peak temperatures of RFC and SCC exhibit linear correlations with ambient temperature during concrete placement. Combined with the regression formula, the previously mentioned on-site measured temperature indicators can be analyzed using the 3σ criterion for anomaly discrimination. The study results provide references and bases for the design and construction of the Yongfeng RFC high arch dam and similar projects.

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基本信息:

中图分类号:TV544

引用信息:

[1]林欣辉,杨家琦,董国聪,等.堆石混凝土高拱坝施工期温度指标变化研究[J].水利水电技术(中英文)().

基金信息:

国家自然科学基金重点项目(52039005);国家自然科学基金项目(52209161); 中央高校基本科研业务费专项资金资助(2025MS070)

发布时间:

2026-09-28

出版时间:

2026-09-28

网络发布时间:

2026-09-28

引用

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