大体积混凝土止浆垫块及拉杆装置在龙溪口航电枢纽中的应用

在船闸工程大体积混凝土施工过程中,常使用高大模板,为保证模板的稳固,增加其安全性,现场施工中往往采用斜拉杆对模板加固,并使用发泡剂或者缠绕胶带等进行止浆,然而这种传统的方法往往存在工序复杂、止浆效果不佳、拆模后混凝土外观质量差等缺点。为解决该问题,采用一种基于大体积混凝土高大模板施工的弹性材质止浆垫块,并辅以端头带螺纹的拉杆装置,可有效防止混凝土浆液渗漏,还可为拉杆预留保护层以防止锈蚀。该止浆垫块在现场施工的应用取得了较好成效,在提升施工质量及效率的同时,较大程度改善了混凝土表面外观,可为类似工程的大体积混凝土施工止浆提供参考。

Application of bulk concrete grouting control pads and tension rod devices in Longxikou Navigation-power Junction

The construction of bulk concrete in ship lock projects often employs large templates.Inclined rods are often adopted for reinforcement during on-site construction,and foam agents or wrapping tapes are used for grouting control to ensure the stability of the templates and increase their safety.However,this traditional method often has the disadvantages of complicated working procedures,poor grouting control effect,and poor concrete surface appearance after demoulding.To solve these problems,we propose an elastic material grouting control pad based on the bulk concrete construction using large templates,supplemented with threaded rods at the end.The pad can effectively prevent concrete slurry leakage and reserve rod protection layer to avoid corrosion.The grouting control pad has been applied to on-site construction with sound results,which greatly improves the construction quality and efficiency,and the concrete surface appearance.Finally,the results can provide references for grouting control in similar bulk concrete construction projects.