An expansion joint should be set in the 4m-10m canal section. New materials, such as tar plastic mortar, elastic polyester coating (ointment), polysulfide sealant, water expansion waterstop, rubber waterstop, etc., should be adopted for the treatment of expansion joints. Second, construction joints refer to temporary horizontal and vertical joints between casting blocks.

One-to-one guidance of imported V-shaped channel slipform machine and channel forming integrated machineIt is also the joint between new and old concrete before pouring. Mechanical equipment such as manual or high-pressure water is used to remove the cement film containing free lime on the surface of old concrete, so that the surface stone is half exposed and the pitted surface is favorable for interlayer bonding. The longitudinal seam surface may not be roughened, but it should be rinsed clean for grouting. After the construction joints are chiseled or chiseled, they shall be washed with pressurized water to make the surface ballastless and dust-free. Cement slurry or small graded concrete shall be laid on the joint surface. When pouring concrete, the construction joints should be well combined, and the original upper construction joints should be appropriately wide.

One-to-one guidance of imported V-shaped channel slipform machine and channel forming integrated machine

Water: use natural clean water, and water with pH value must be tested and qualified before use One-to-one guidance of imported V-shaped channel slipform machine and channel forming integrated machineThe method has the effects of setting formwork input and turnover, occupying site area and accelerating construction speed. The method is simple, practical and effective to operate, and can save cost and production efficiency through popularization and use. In addition to the above objects, features and advantages, the present invention has other objects, features and advantages. One-to-one guidance of imported V-shaped channel slipform machine and channel forming integrated machine

Channel anti-seepage is divided into rectangular channel, trapezoidal channel, U-shaped channel and compound channel according to the section form; According to anti-seepage materials, it can be divided into mortar masonry channels (cement mortar or lime mortar), which include mortar rubble and facing concrete. In recent years, mortar masonry and anti-seepage membrane materials, cast-in-place concrete channels, anti-seepage membrane material channels under cast-in-place concrete or precast concrete slabs, prefabricated concrete slabs with thermal insulation materials (polystyrene or perlite) channels, etc. Trapezoidal section precast concrete slabs or cast-in-place concrete slabs with anti-seepage membrane and U-shaped sections of cast-in-place concrete are widely used in channel anti-seepage. Especially, the application of anti-seepage technology of concrete U-shaped canal and the appearance of cast-in-place technology of trapezoidal cross-section concrete slab have further developed the anti-seepage technology of canal.