Channel shotcrete anti-seepage technology has been successful

In November 2003, the channel-jet concrete impervious technology in Jingxing County of Hebei Province was successfully achieved, and was evaluated by two levels of experts from Hebei Province and Shijiazhuang City respectively.
The People's Canal Management Office in Jinghe Mianhe Irrigation District in Hebei Province began in May 1998. Under the guidance of experts from the Department of Water Resources and Water Resources of the Ministry of Water Resources, the Chinese Academy of Water Sciences, and the provincial and municipal water conservancy departments, sprayed concrete technology was used in channel seepage control projects. During the construction of shotcrete impervious tests, they inquired about the latest domestic channel seepage prevention technology according to the characteristics of the channels, conducted comparisons, demonstrations and feasibility studies of different materials, methods, and conducted tests. Finally, they were selected and compared. It is believed that the results of the impervious test technology for the shotcrete shotcrete in the main canal are suitable for the use and promotion of the anti-seepage project for the water-saving renovation of the hill and canal channels.
The project's success, from a technical point of view, leakage per kilometer of water is less than 0.5%, roughness is 0.014-0.017, impermeability is up to S4, frost resistance is up to D50. Moreover, shotcrete technology is to mix concrete. The material is directly sprayed onto the surface of the channel under the action of high-pressure gas, and it is coagulated with the pre-paved stone. The concrete strength can be increased by 10% to 30%. Analysis of the test section from the economic point of view, shotcrete impervious 219 yuan per meter, masonry impervious 382 yuan per meter, reduce costs 163 yuan, project benefits are obvious, considerable economic benefits, not only reduced leakage, improved water Utilization, but also reduced the channel dredge workers. According to calculations, if all 218 kilometers of main canal are impervious, the annual water saving can reach 20 million cubic meters, the main canal water utilization coefficient can be increased from 0.55 to 0.95, the water fee income can be increased by 2 million yuan, and the dredging cost can be saved by 750,000 yuan.
The anti-seepage of channel sprayed concrete is an impervious measure that saves labor, material, operation, speed, low roughness, high water-saving performance and low cost.