防渗抗裂技术在池类结构中的应用

Anti-seepage crack technology in the application of pool class structure

吴中区城南污水处理厂,设计规模日处理污水15万t,构筑物单体体积大,防渗抗裂要求高。本文结合工程特点,在提出了6种防渗抗裂措施:在池类混凝土中添加高性能膨胀抗裂剂提高混凝土的抗渗性能,在大面积池底浇筑中通过设置加强带实现了无缝施工,特大型池体结构采用跳仓浇筑技术来降低水泥水化热和混凝土收缩的影响,圆形池壁采用无粘结预应力技术以提高混凝土构件抗裂性能,以及后浇带、遇水膨胀止水条在结构中的应用,通过几种措施的应用,有效的提高了构件的防渗抗裂性能,预防了裂缝和渗漏的发生,满足了施工和生产的要求。

Wuzhong District city sewage treatment plant, the scale of the design daily processing 150000 tons of sewage, construction monomer of large volume, high anti - cracking and impermeable. In this paper, combined with engineering characteristics, the proposed 6 kinds of impervious and anti - crack measures ： the addition of high performance expansive anti - cracking agent to improve the impermeability of concrete in the pool concrete, reinforced with seamless construction by in large area bottom pouring, body structure large pool using sequence placement techniques to reduce the effect of the hydration heat concrete shrinkage, round tank wall using unbonded prestressed technology to improve crack resistance of concrete components, as well as the pest - pouring belt, water expansion sealing strip in structure, through the application of several measures, effectively improve the anti - cracking and impermeable performance component, prevent crack and leakage occurred, to meet the construction and production requirements.