## 1 Introduction
However, in actual engineering, water storage is carried out multiple times to reach the normal water storage level, and the number of water storage times can also have a certain impact on the stress and deformation of the panel, which is worthy of further research. The bank slope gradients of the dams are compiled in Table 1. The topography of each dam's valley varies, consisting of wide and narrow valleys. The former has less constraint on the dam body, while the latter imposes a stricter constraint. However, there may be increased shear slip and deformation gradient between the dam body and the foundation in narrow valleys, which is unfavorable for the deformation control of the panel. Furthermore, the river valley's bank slope comprises both steep and gentle slopes. When the river valley slope is steep, a stress arch effect is likely to occur in the dam body, hindering deformation control. Additionally, there are symmetrical and asymmetrical conditions on the bank slope, and these variations on the valley's bank slope have a notable impact on the stress and deformation of the panel, necessitating further investigation. Given that the panel construction is not filled to the dam crest all at once during actual construction, phased construction of the panel directly influences the stress and deformation of the panel. Therefore, phased construction of the panel is considered as one of the influencing factors. The temperature of the concrete can significantly influence the stress and deformation characteristics of the dam. An elevated internal temperature, coupled with an uneven distribution of hydration products, may result in an increase in internal pores, a reduction in structural strength, and an enhanced likelihood of the development of internal microcracks and thermal cracks. Such phenomena can substantially affect the stress state of the overall structure of the concrete. In light of the foregoing considerations, numerous factors contribute to the stress and deformation characteristics of CFRDs. This study selects dam height, bank slope gradient, water storage  
Previous studies examining factors influencing stress and deformation in medium and high CFRDs primarily conducted qualitative analyses, often lacking in quantitative assessments of each factor's degree of influence or sensitivity analysis. To address this gap, it is imperative to investigate the stress and deformation properties of ultra-high CFRDs and their influencing factors. Reviewing the extant literature through the lens of stress and deformation, this study aims to examine the sensitivity of key factors to the stress and deformation characteristics of ultra-high dam bodies and panels, quantitatively delving into the significance of different influencing factors on the stress and deformation characteristics of the dam and panel. Additionally, this study investigated the overarching impact of the three most influential factors on the stress and deformation of both the dam and panel. This study amalgamates ABAQUS and a projection pursuit regression (PPR) technique to quantitatively delve into and critique the significance of various influencing variables on the stress and deformation attributes of CFRDs. Furthermore, it examines the generalized stress and deformation regulations attendant upon variations in these influencing factors. It offers comprehensive direction for the design, construction, supervision, and preservation of ultra-high dam engineering, thereby enhancing the security and dependability of the project.