提高地铁隧道钢筋混凝土耐久性措施研究

如何有效提高混凝土的耐久性，控制大型钢筋混凝土构筑物的裂缝，是土建工程的一个重点和难点。本文阐述了混凝土裂缝的种类，从收缩裂缝、温度裂缝、不均匀沉降裂缝等方面论述了裂缝的产生原因，并从工程设计、材料、施工、养护等方面提出了裂缝控制的措施与方法。对既有的混凝土裂缝，根据不同情况，采取有针对性的治理方案进行治理，保障了结构的安全运营。

Study on Measures to Improve Durability of Reinforced Concrete of Tunnel Works

It is an important and difficult issue of civil engineering works to effectively improve the durability of the concrete and control the cracks of large-scale reinforced concrete structures. The article describes the types of the concrete cracks and summarizes the reasons for the concrete cracks in respect of shrinkage cracks, temperature cracks and differential settlement cracks. The article also recommends some measures and methods to control the concrete cracks from the viewpoint of design, materials, construction and maintenance. For the existing concrete cracks, effective treatment measures are taken in accordance with the actual situations, so as to ensure the operation safety of the concrete structures.