【摘要】 现浇混凝土防渗渠道普遍采用设置伸缩缝的方法防止混凝土产生裂缝,而伸缩缝的止水易因老化和长草等遭受破坏,导致渠道渗漏。针对上述弊端提出了无伸缩缝混凝土防渗衬砌渠道的隔板跳仓浇筑施工技术。经过在多个大中型灌区节水项目中推广应用,总结出该施工技术的操作步骤和技术要点,包括基面处理措施,浇筑方法,操作要点,浇筑,振捣、抹面等的质量要求及适用范围。多年的运行实践表明,该技术可明显节约投资、缩短工期、延长使用寿命、有效改善防渗效果,且施工简便、工程质量易于保证等。更多还原

【Abstract】 Traditional lining canals poured-in-place concreting normally set up expansion joints and water seal to prevent concrete crack,but the water seal is easily damaged due to structure aging and weeds growing.The failure of water seals causes great seepage loss of canals.In order to overcome these shortcomings,a new concreting technology of lining canal without contraction joint is proposed.Based on practices over the past twenty years,the main construction procedures,operating principles and technical requirement are summarized such as:foundation surface treatment,casting intervals,pouring,vibrating and plastering of concrete.The application scope of this technology is also introduced.The results of practical application indicate that this technology can provide convenient and fast construction,reduce the construction period and expenditure,effectively control project quality,increase service life and enhance the waterproof effect.更多还原