- 林立文1，王晨光1，康 健1，张 坚2,3，徐 文2,3，王育江2,3，贺 飞4，郑 彬5
2022年第2期
摘要
引用本文
摘 要：为了抑制金鸡湖隧道主体结构厚度为1.4 m侧墙的早期收缩裂缝，在优选原材料与配合比设计的基础上，提出了采用抗裂剂与冷却水管控温协同控制的方法来降低混凝土开裂风险，并通过理论评估与工程应用分析了该方法的可行性。结果表明：夏季高温施工时，通过使用抗裂剂与合理预埋、操作冷却水管来调控结构温升和变形，可将收缩开裂风险系数基本控制在0.7以下，实体结构监测结果也表明该方法切实有效。研究成果可为不具备严格控温条件的类似现浇隧道混凝土结构的开裂预防设计提供参考。
Abstract: In order to inhibit early-age shrinkage cracks of the sidewall with a thickness of 1.4 m in main structure of Jinji Lake Tunnel, based on the optimization of raw materials and mix proportion design, a cooperative control method of anti-cracking agent and cooling water pipe was proposed to reduce the concrete cracking risk, and the feasibility of this method was analyzed through theoretical evaluation and engineering application. The results show that the shrinkage cracking risk coefficient can be basically controlled below 0.7 by using anti-cracking agent and reasonably embedding and operating cooling water pipe to control the temperature rise and deformation of the structure during high temperature construction in summer. The monitoring results of actual structure also show that this method is effective. The research results can provide a reference for the crack prevention design of similar cast-in-place tunnel concrete structures without strict temperature control conditions.
林立文,王晨光,康健,等.抗裂剂与冷却水管协同控制金鸡湖隧道侧墙结构开裂应用研究[J].混凝土与水泥制品,2022(2):82-86.
LIN L W,WANG C G,KANG J,et al.Study on the Effect of Anti-cracking Agent and Cooling Water Pipe on the Cracking of Sidewall Structure of Jinji Lake Tunnel[J].China Concrete and Cement Products,2022(2):82-86.
