Qihui Chai's research while affiliated with North China University of Water Conservancy and Electric Power and other places
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Publications (5)
Cemented sand and gravel (CSG) material is a new type of dam material developed on the basis of roller compacted concrete, hardfill, and ultra-poor cementing materials. Its main feature is a wide range of sources of aggregate (aggregate is not screened but by simply removing the large particles it can be fully graded on the dam filling) and low amo...
With the rapid development of economy and society, the contradiction between supply and demand of water resources is increasing. Efficient utilization and allocation of limited water resources are one of the main means to solve the above contradictions. In this paper, the multidimensional joint distribution of natural streamflow series in reservoir...
The priority principle of storage allocation rules of serial cascade reservoirs within an inter-basin water supply can reduce water loss and reduce water supply times. Reasonable balancing curves for reservoirs in parallel are proposed and the proportional distribution of water is determined to illustrate the optimal allocation rule for different s...
With the rapid development of urban underground space, flood control measures based on sandbags can no longer meet its flood control requirements. This paper studies a new mobile flood control wall based on the entrance and exit of urban underground space. The mobile flood control wall is composed of baffles, bottom plates, and struts of aluminum a...
This paper takes the cemented sand and gravel dam (CSGD) in Shoukoubao reservoir as the prototype to introduce in detail the similarity principle of model test and describe the selection steps of materials for CSG model. It has developed similar materials for CSGD model by mixing coarse sand, barite powder, gypsum powder, cement, and iron powder so...
Citations
... However, an increased proportion of BS (1-7%) led to a reduction in workability and strength with a more porous structure, but which still met the minimum strength requirements of masonry construction. The influence of fly ash content on the compressive strength of cemented sand and gravel (CSG) materials was evaluated by Chai et al. [2]. They found that 90 d or 180 d strength should be used as the design strength in the design of CSG dam material. ...
Reference: Advances in Sustainable Concrete System
... Ni et al. [13] elaborated on the application prospects and structural characteristics of light mobile flood control walls, combined with theoretical calculations and finite element analysis techniques and focused on explaining the structural forces and failure modes of light mobile flood control walls. Zhang et al. [14] studied a new type of mobile flood control wall based on urban underground space entrances and exits. e stability and safety of flood control walls were analyzed through the material mechanics method, which provided a positive reference for urban underground space flood control. ...
... The foundation is made of C30 concrete. Considering the size effect of scale model, the materials of the dam are modulated according to the similar-material proportioning based on the similarity principle of the model test [80,81]. Given that Poisson's ratio has an insignificant influence on the vibration response of the structure [82], only the density and elastic modulus of these two parts are considered as unknown input parameters. ...
