防止隧道衬砌开裂的相关措施研究

在道路施工过程中,隧道衬砌开裂现象在施工中是常见问题。由于隧道衬砌施工主要为混凝土结构,导致混凝土开裂的因素较多,如温度的变化、应力变化、不均匀凹陷等。基于此,以实际工程为例,主要阐述了该工程隧道衬砌施工中产生裂缝的主要类型,分析了产生裂缝的原因,并提出了防止隧道衬砌开裂的有效措施,望能为同类工程提供借鉴。

二郎山隧道衬砌严重开裂段的结构加固措施及其安全性分析

文章介绍了G318二郎山隧道衬砌严重开裂段的病害情况,结合隧道地质与施工情况分析了病害成因,确定了以套拱加固为主的加固措施,并使用有限元软件对加固措施的安全性进行了计算分析。

河腰村隧道衬砌裂缝原因分析及注浆处理

隧道衬砌裂缝不仅影响隧道工程的表观质量,而且严重时将影响结构安全。从地质因素、工程设计和施工工序等方面分析了衬砌裂缝产生的原因,并提出整治衬砌开裂病害的原则、措施和施工方法。旨在对类似条件铁路隧道衬砌开裂病害整治提供借鉴与指导作用。

隧道裂缝缺陷处治技术在施工中的应用

隧道工程中常见的质量缺陷是衬砌混凝土裂缝。文章针对某高速公路K隧道施工中存在的衬砌裂缝现象,通过对裂缝的调查与检测,分析了产生裂缝的原因,制定了裂缝处治+钢带加固的综合处理措施,有效保证了隧道工程的安全和质量。

Test and Numerical Analysis on Performance of Reinforced Concrete Segment in Subway Tunnel

To investigate the mechanical behavior of segmental lining, a three-dimensional numerical analysis and test using three actual segments were used to analyze the effects of axial force and reinforcement ratio on the failure mechanism and ultimate bearing capacity of segmental lining. Both numerical and test results confirmed that the cracking load, yield and ultimate load were strongly influenced by axial force, and it was also proved that the yield and ultimate load would increase with the increase of reinforcement ratio, but the cracking load was almost not affected. The cracking load, yield and ultimate load are about 28.7%, 500% and 460% larger due to the effect of axial force respectively. The comparison between numerical calculation and test results showed that the finite element analysis resuits were in good agreement with the test results.