Research and application of intelligent construction monitoring system in the dam filling process of the Altash Hydro-junction dam

Earth-rock dam is the most common type of dam in water conservancy and hydropower engineering. Earth-rock dams have many advantages in material selection, but the management of earth-rock dams during construction is a difficult problem at present. In the process of filling construction of earth-rock dam, due to the characteristics of the wide construction area, long construction period and harsh operating environment of construction machinery, the traditional dam filling construction process management model is difficult to fully control the construction quality. The Altash Hydro-junction dam is the largest water conservancy project under construction in Xinjiang. The type of dam is sand and gravel rock-fill dam with a concrete face, with a total length of 795.00m, a crest elevation of 1825.80m, a crest width of 12m and a maximum height of 164.8m, the filling capacity is about 25 million m3. In addition, due to dam construction on the deep layer, and its seismic fortification intensity 9 °, dam embankment and settlement request is higher and the quality control in the process of the dam filling put forward the major challenge. In this case, the project uses China's Beidou high-precision positioning equipment, combined with RTK differential system, to achieve real-time intelligent monitoring of the dam rolling construction process dynamically and high-precision. Combined with this technology, the project has realized the strict control of dam filling construction quality and improved the construction management level of water conservancy projects.