Purpose: The purpose of this article is to understand the current research status and future development trends in the field of numerical simulation on rock mass grouting.Design/methodology/approach: This article first searched the literature database (EI, Web of Science, CNKI, etc.) for keywords related to the numerical simulation of rock mass grouting to obtain the initial literature database. Then, from the initial database, several documents with strong relevance to the numerical simulation theme of rock mass grouting and high citation rate were selected; some documents from the references were selected as supplements, forming the sample database of this review study (a total of 90 articles). Finally, through sorting out the relationship among the literature, this literature review was carried out.Findings: The numerical simulation of rock mass grouting is mainly based on the porous media model and the fractured media model. It has experienced the development process from Newtonian fluid to non-Newtonian fluid, from time-invariant viscosity to time-varying viscosity, and from generalized theoretical model to engineering application model. Based on this, this article summarizes four scientific problems that need to be solved in the future in this research field: the law of grout distribution at the cross fissures, the grout diffusion mechanism under multi-field coupling, more accurate grouting theoretical model and simulation technology with strong engineering applicability.Originality/value: This research systematically analyzes the current research status and shortcomings of numerical simulation on rock mass grouting, summarizes four key issues in the future development of this research field and provides new ideas for the future research on numerical simulation on rock mass grouting.

A dam is a super‐structure widely used in water conservancy engineering fields, and its long‐term safety is a focus of social concern. Deformation is a crucial evaluation index and comprehensive reflection of the structural state of dams, and thus there are many research papers on dam deformation data analysis. However, the accuracy of deformation data is the premise of dam safety monitoring analysis, and original deformation data may have some outliers caused by manual errors or instruments aging after long‐time running. These abnormal data have a negative impact on the evaluation of dam structural safety. In this study, an analytical method for detecting outliers of dam deformation data was established based on multivariable panel data and K‐means clustering theory. First, we arranged the original spatiotemporal monitoring data into the multivariable panel data format. Second, the correlation coefficients between the deformation signals of different measuring points were studied based on K‐means clustering theory. Third, the outlier detection rules were established through the changes of the correlation coefficients. Finally, the proposed model was applied to the Jinping‐I Arch Dam in China which is the highest dam in the world, and results indicate that the detection method has high accuracy detection ability, which is valuable in dam safety monitoring applications.

To investigate the time‐varying dynamic characteristics of concrete dams under the excitation of large earthquakes for online structural health monitoring and damage evaluation, an online modal identification procedure based on strong‐motion records is proposed. The online modal identification of concrete dams is expressed as a subspace tracking problem, and a newly developed recursive stochastic subspace identification (RSSI) method based on the generalized yet another subspace tracker (GYAST) algorithm, which exploits both the accuracy of the subspace identification and fast computational capability, is used to extract the time‐varying modal parameters of concrete dams during earthquakes. With the simulated vibration response records, a numerical example is used to verify the accuracy, robustness, and efficiency of the proposed GYAST‐based, time‐varying modal identification method. Then, the realistic strong‐motion records of the Pacoima arch dam are analysed using the proposed modal identification procedure, and the time‐varying characteristics of the concrete arch dam during three different earthquakes are analysed.

In the context of peaking carbon dioxide emissions and carbon neutrality, the construction of hydropower projects has strict regulations on the demand for construction materials, which also puts forward new requirements for design organizations. Several power stations have successfully applied spillway and floodway double-discharge building shared stilling pools as the new requirements of the design program. By the stilling pool, we mean it is an energy dissipation facility that generates a bottom-flow water jump downstream of the discharge structure. However, this type of program will be due to the uneven distribution of the flow of the double building problems, leading to its flow pattern being too complex and stilling pool dissipation characteristics being unclear. For this reason, based on the hydraulic model test method, this paper studies and analyzes the hydraulic characteristics of the new type of stilling pool in the shared stilling pool scheme of the double-drainage structure when the flood relief hole is needed to dominate the flow in particular circumstances. For the problems exposed during the test, three auxiliary dissipation schemes were added to the stilling pool, and their influence on the hydraulic characteristics of the stilling pool was studied. The results show that the baffle block can effectively reduce the stilling pool's bottom flow velocity and improve the stilling pool's water flow pattern compared with other programs. The dissipation effect is better than other schemes. The related research can provide technical support for further engineering applications of the double-drainage structure shared stilling pool program.