水泥预制U型槽渠道施工工艺
Construction technology of cement prefabricated U channel channel
U型槽灌溉渠，主要包括UD20、1/2UD120等九种规格的灌溉渠道，渠道结构为预制砼U型槽，槽底铺设砂夹石垫层，槽顶为C15压顶砼。1、其材料控制要求： U型槽现场预制应有砼标号及拌和配合比并按标准取样试压，在预制过程中应符合规范有关规定;内外侧表面应平直圆滑，不得出现蜂窝、麻面现象;端面应平整并与其轴线垂直;强度和尺寸应满足设计要求。2、U型槽灌溉渠工程施工流程：施工准备→土方开挖→验槽→断面欠方回填土→渠道U形槽底砂垫层铺设→订购砼U型槽、进场检验→砂垫层铺筑高程复核→安放U型槽调整纵坡、高程→U型槽接缝处理→压顶砼浇筑→渠道U型槽外观检测、放水检验→交工验收
The U channel irrigation canal mainly includes nine kinds of irrigation channels, such as UD20 and 1/2UD120. The channel structure is precast concrete U groove, the bottom of the trough is laid with sand sandwiched layer, and the top of the trough is C15 top concrete. 1, its material control requirements: U groove site prefabrication should have concrete marking and mixing ratio and test pressure by standard sampling. In the process of prefabrication, it should conform to the relevant regulations; the inner and outer surfaces should be smooth and smooth, no honeycomb and flex; the end face should be flat and perpendicular to its axis; the strength and size should meet the design requirements. The construction process of 2 and U channel irrigation canal project: construction preparation, earthwork excavation, cross section underfill soil, channel U trough bottom sand cushion, order concrete U trough, entrance examination, sand cushion layer building elevation recheck, adjustment longitudinal slope of U type trough, height to U slot joints, pressure top concrete pouring and channel U groove appearance Inspection, water release inspection, inspection and acceptance