What are the research results on the technology of concrete face rockfill dam filled with small particle-size stones?
Apr 15, 2024
The research results of the technology of concrete face rockfill dam filled with small particle size stones mainly include the following aspects:
Acquisition and application of test parameters: Through indoor and on-site rolling compaction tests of the Mayan Reservoir project, the test parameters for dam construction with small particle-size rockfill materials were obtained. These parameters show that although the gradation of small-size stone does not meet the traditional empirical requirements, the remaining parameters meet the specification requirements, thus proposing supporting construction technologies suitable for this project and broadening the application scope of rockfill materials in face rockfill dams.
Seismic response analysis: On-site compaction tests were conducted on small-grained weathered stone materials, and their degeneration modulus, Poisson's ratio, permeability coefficient, and triaxial fast shear mechanical parameters under the maximum density state were obtained through indoor tests. Based on these parameters, the one-dimensional shear layer method was used to conduct a dynamic response analysis of the dam body under a 7-level earthquake intensity, which verified that this kind of stone can be used as filler for face rockfill dams, further broadening the possibilities for filling concrete face rockfill dams. Choice of building materials
Analysis of deformation monitoring results: By analyzing the deformation observation results of the dam body during the dam construction of small-grained semi-weathered basalt in Dashuigou Reservoir, it was verified that determining reasonable rolling parameters and paving thickness can ensure the quality of the project and ensure reliable operation of the project. sex and design rationality provide an important basis
Technical principles and practice: According to the conclusions drawn from the rolling compaction test, only thin layers and multiple rolling passes can achieve a larger dry density and lower void ratio for the uniform dam material, and then the small particle size of the face rockfill dam was proposed. Basic principles for the utilization of track pile rock materials. The success of the technology of filling the face rockfill dam with small particle size stones in Dashuigou Reservoir has not only broadened the scope of use of face rockfill dam materials but also made breakthroughs in the application of dam construction materials, which has promoted the value
Technological innovation and development: In recent years, rockfill concrete technology has made many breakthroughs in dam construction materials, such as low cement consumption and high self-compacting performance concrete, soft rock as rockfill material in red bed areas, special concrete mix ratios in alpine areas, etc. In addition, continuous technological innovation in structural optimization, construction technology, mechanical equipment, etc. in engineering practice has promoted the development of rockfill concrete arch dams. Integrated pouring technology is widely used in anti-seepage layers, corridors, slope section cushions, etc.
Application of BIM technology: Based on BIM technology and the three-dimensional simulation software Navisworks, the construction process of the face rockfill dam was dynamically simulated, and different evaluation indicators were set to evaluate the application of BIM technology using gray system theory. The results show that BIM technology can be well applied in the construction management of face rockfill dams, and the maturity of technology application is high, which can effectively improve the efficiency of project construction.
The research results of the technology of small-size stone-filled concrete face rockfill dam cover the acquisition and application of test parameters, seismic response analysis, deformation monitoring results analysis, technical principles and practices, and technological innovation and development, showing that the Technology has achieved remarkable results in improving project quality, broadening the scope of material applications, and promoting technological innovation.
