Long‐Term Settlement of High Concrete‐Face Rockfill Dam by Field Monitoring and Numerical Simulation

Abstract

High concrete-face rockfill dams (CFRDs) with heights of over 100 m have been quickly developed in recent years. The self-weight of rockfill materials causes creep deformation of the dam body. However, the creep analysis method of high CFRDs in finite element software is few, and sometimes, it can also not reflect the long-term performance of high CFRDs well. Therefore, it is necessary to carry out the secondary development in finite element software. This study developed a subroutine that can run in Finite Element Method (FEM) platform ABAQUS to simulate long-term creep deformation behavior of the rockfill materials more accurately. Then, a displacement back-analysis for parameters, based on the Xujixia high CFRD project, is performed by the neural network response surface method (BP-MPGA/MPGA). Remarkable agreements are observed between simulation and field monitoring results. The calibrated FEM model is used to predict stress and deformation behavior of the Xujixia high CFRD after three years of operation period. The result indicates that rockfill creep deformation has a significant impact on stress and deformation of the high CFRD during the operation. This research may predict long-term performance using FEM in the design stage for high CFRDs.

Concrete Construction Engineering Management in the Context of the Internet of Things

“…At the same time, it can be concluded from the above results that there are many defects in technology and organizational management and the focus is on the mistakes of operation and management of two types of construction groups. To improve the level of building safety management, it can be carried out by increasing technical training, strengthening on-site supervision and supervision, and improving safety management regulations [23]. If the personnel management is simply carried out, the problem of insufficient and comprehensive safety management may be caused due to factors such as experience, knowledge, and technology.…”

Creep parameter inversion for high CFRDs based on improved BP neural network response surface method

“…In this table, the combination of factor levels corresponding to each row refers to one type of test plan. Then, FEM calculation was carried out according to the test designed in the orthogonal table, and literature(Zhou et al 2020) shows the specific FEM calculation process.…”