Abstract:

The field poured-in-place concrete structure was screened as the channel lining main way which was the cost economic, the quality of construction easy control, water seepage good effect, higher project benefit, better operation condition, longer service life based on the cost analysis with three kinds of impervious lining structure canal in the farmland channel construction including the grouted rubble, precast concrete channel and the poured-in-place concrete in the tobacco-rice rotation field of the Northwest of Fujian province from 2005 to 2007 and combining with the comparison of the anti-seepage effect, project benefit and the operation condition service life. Owing to the new technology of formwork erection of the double-side formwork erection and fixed steel frame, the aim on the construction objective of integral concreting, once forming was realized. It was proved that the channel compactness and strength were improved with the method. In addition, the channel surface pit was lessened and the silt prevent, anti-erosion and abrasion resistance were enhanced. The results indicated that the channels were not only more fluent lines and beautiful appearances, but also better discharge capacity, more convenient management and prevervation and longer service life.