The Duncan-Zhang model is not able to reflect the influence of the mid-major stress on the strength and deformation of the rockfill body in the finite element calculations of the panel rockfill dam. The Duncan-Zhang E-B model and its optimization model for the panel rockfill dam has been developed by the secondary development of ANSYS based APDL language. The Duncan-Zhang E-B model and its optimization model were used to calculate the three-dimensional finite element static force of a panel rockfill dam in Yunnan Province. The results show that the settlement of the dam body was reduced, the horizontal displacement was reduced, and the stress change was small. The strain results obtained from the optimization model are closer to the actual data. The optimizaion Duncan-Zhang E-B model considering the medium principal stress can better reflect the stress-deformation characteristics of the panel rockfill dam.

With the development of urbanization in China, secondary water supply has become a key part of urban water supply, but the utilization efficiency of water resources is low. This paper proposes the Demand Side Management (DSM) model based on the user's perspective. Starting from the user's Demand Side Management, the low water tank in the secondary water supply system at the end of the pipe network is taken as the research object. Using adaptive FCM clustering analysis and grey relational analysis, the paper analyzes the characteristics of user water use in different types of small areas, excavates the potential of regulation and storage and studies the peak-shifting scheme, and determines the appropriate peak-shifting scheme, so as to achieve good peak-shifting by demand-side management.

With the acceleration of urbanization in China, the demand for water resources is increasing, and the leakage of the water supply pipe network has caused waste of water resources. Therefore, leakage control is imminent. The first is to accurately calculate the leakage of the pipe network, but the current methods have certain deficiencies. Based on the Kalman filter, this paper establishes an analysis model of pipeline network leakage, and uses the empirical formula of node leakage, standard Kalman filter (SKF) and innovation adaptive Kalman filter (IAKF) to calculate the leakage of the pipeline network, respectively. Taking the actual pipe network project as an example, the EPANET simulation was carried out, and the calculation results were compared. The results show that using both filtering algorithms is more accurate than the nodal leakage formula, and the result of the IAKF algorithm is better than that of the SKF algorithm. This provides a theoretical basis for accelerating the research on leakage control technology and implementing scientific and effective leakage control methods, which has certain significance for urban water saving and sustainable development.

The effect of luring fish is one of the key factors affecting fish passing efficiency in the entrance area of fish-passing facilities. Proposed a new optimization idea of side-channel drop-flow to lure fish. The upstream water was replenished to the area outside the fishway entrance as drop-flow. With the help of auxiliary facilities such as cantilever plate, the attractive flow was formed in the horizontal orientation. Take the fishway project of Shaping I Hydropower Station as example, a large scale physical model was established to demonstrate and optimize the scheme, and the flow pattern near the entrance of the fish-passing facility were analyzed, and the possibility of attracting fish was discussed. The experimental results show that the one-dop scheme is favorable for attracting the migratory fish in the horizontal orientation, with the flow velocity of 0.3-0.5 m/s, and the information of flow pattern is rich in the entrance area, which is suitable for fish aggregation.

In order to improve the aerated concentration of the stepped energy dissipator, mitigate the damage of cavitation and cavitation erosion, and improve the energy dissipation rate, the stepped energy dissipator with segmented piers was proposed. The influence of the arrangement of the front pier and the reverse pier of the energy dissipator on the hydraulic characteristics of the stepped energy dissipator with segmented piers was studied by numerical simulation. The results show that the stepped energy dissipators with segmented piers generate hydraulic jump near the energy dissipators in the flat and straight section of the terrace. The arrangement of the main pier has better effect of hydraulic jump aeration, higher concentration of aeration along the way, and better effect of cavitation erosion mitigation; The flow velocity along each stage increases gradually, and the arrangement of the main pier has lower flow velocity and better energy dissipation effect; A large range of positive pressure is formed on the upstream area and the upstream area of the energy dissipation pier, and negative pressure is generated on the top and back surface of the energy dissipation pier. The arrangement of the positive pier has a high blocking effect on the water flow, and the arrangement of the reverse pier has a large negative pressure; Under each flow condition, the energy dissipation rate of the two arrangement forms is higher, and the energy dissipation rate of the positive pier arrangement form is higher when the flow is larger, which has better energy dissipation effect. The arrangement of the main pier has better effect in reducing the cavitation damage of the step and improving the energy dissipation rate, which can provide a reference for the structural design of the stepped energy dissipator with segmented piers.

The mechanical effect of plant roots on soil is an important factor in improving the erosion resistance of slopes, and the relevant research on the impact resistance of plant roots under water flow at home and abroad is in a blank spot. In this paper, the common soil and water conservation plants tall fescue and dogtooth roots were selected as the research objects, and the jet erosion test was carried out on the slope of the plant model, and the erosion failure mechanism of the root slope of different species of plants was compared. The main conclusions are as follows: the variation law of the average erosion depth ΔD_AE of high fescue slope, dogtooth root slope and plain soil slope under different working conditions is similar and consistent, and it increases exponentially as a function with the increase of erosion flow velocity and linear function with the increase of erosion angle. The average erosion depth under various working conditions was generally as follows: high fescue< dog tooth root< plain soil; The average erosion depth of high fescue at each flow rate decreased slightly ΔD_AE slightly greater than that of dog tooth root. When the scouring angle was fixed, the ΔD_AE of each angle was the largest when the flow rate was 1.6 m/s, and the flow rate was higher than 1.6 m/s, and gradually decreased. When the erosion flow rate is constant, there is a decreasing tendency ΔD_AE increase with the increase of the scouring angle.

In order to explore the energy evolution law of rock failure process in the excavation process of diversion tunnel, this paper selects magnetite ore and carries out conventional triaxial and triaxial pre-peak constant axial pressure unloading confining pressure tests. The results show that in the conventional triaxial test, the rock is dominated by elastic strain energy storage and dissipative strain energy consumption before the peak stress, and the elastic strain energy release and dissipative strain energy consumption after the peak stress. With the increase of confining pressure, pre-peak shear fracture energy is higher than post-peak shear fracture energy. In the unloading confining pressure test, the dissipated strain energy increases exponentially. The faster the unloading rate, the shorter the unloading period is, and the higher the rate of energy increment per unit time between the unloading point and the drop point. Based on the M-C criterion of rockburst dynamics, the loss of rock cohesion and the dissipated strain energy of rock under unloading path, the damage variable in the process of rock unloading is defined, and the damage degree of rock deformation and failure is revealed from the perspective of energy.

The diversion tunnel plug is a key project for the safety of water conservancy and hydropower projects. Wedge-shaped plugs are widely used in engineering. There are many calculation methods for columnar plug, but not so much for the wedge-shaped plug. Based on the design scheme of the diversion tunnel plug in Karot power station, this paper carried out the theoretical and numerical simulation analysis. Through the force analysis of the wedge, the calculation method of the hydraulic pressure bearing capacity of the wedge-shaped plug was proposed. The comparative analysis of wedge and columnar plug safety was carried out by three-dimensional elastoplastic numerical simulation. The result shows that the maximum deformation under the calibration water level of the wedge-shaped plug was 0.8 mm, and its overload safety factor was 1.08 times that of the columnar plug. By comparing the numerical simulation with the formula calculation results, the rationality and accuracy of the calculation method for the bearing capacity of the wedge-shaped plug were verified. The research results have important guiding value for the design of wedge-shaped block.

The Xiongan storage reservoir is a pumped storage reservoir, an important water source project supporting the construction and development of the Xiongan new area, and a key supporting project to ensure the safety of water supply in the new area, with high requirements for project seepage prevention. The F₁₇₃ fault, which is the largest fault in the reservoir basin, runs through the NE-SW direction, and forms low passes on the NE side and the SW side of the reservoir basin, and there is local dissolution along the fault. The lithology and structural sealing conditions of the reservoir are poor. In order to control the seepage of the reservoir, curtain grouting was used to prevent seepage around the reservoir. In order to explore a suitable implementation method for curtain grouting of Xiongan storage reservoir, it is necessary to determine the anti-seepage treatment measures, grouting construction method and construction technology of the F₁₇₃ fault through grouting test research. The results indicate that the permeability meets the anti-seepage standards and the fatigue resistance is improved.

Research and exploration on intelligent grouting technology has been conducted in some hydro-power stations in recent years. Intelligent grouting equipment has been invented and intelligent control strategies for conventional geological conditions have been developed. However, the existing technology lacks the intelligent control strategies for pressure sensitive and weak stratum, and is not suitable for grouting construction under complex geological conditions. Relying on the Xiong'an regulation and storage reservoir project and based on the empirical research method, this paper has carried out researches on new intelligent strategies for weak strata such as lift sensitive and split sensitive. The field test results show that the intelligent grouting technology meets the needs of field construction, in which the water pressure and grouting construction process can be intelligently completed, and the lifting and splitting situation can be handled. The research is conducive to ensuring the quality of grouting projects and improving the level of intelligent construction.