Heliyon (Feb 2024)
Study on the deformation law of the construction of the cutoff wall of the reservoir
Abstract
Relying on the middle line of south-to-north water diversion project ning storage reservoir has built the construction load impact assessment project, the study through the analysis of field conditions select reasonable monitoring section and monitoring scheme, the late monitoring, the results can reflect the overall deformation of the wall and stress, and use in advance in the wall, monitoring instruments, to the typical section of field deformation, pressure, strain and stress, automatic oblique monitoring results to introduce the stress strain of the whole wall. Research results: The soil pressure showed the larger on the outside and the slightly smaller on the inside; Concrete strain relative to the initial state in the direction of vertical wall and vertical strain increment is larger, The strain increment along the wall direction is small; The data of the reinforcement stress gauge are all negative, And the quantity value of the inner steel bar gauge continues to increase, The monitoring value of the outer steel bar gauge has a tendency to decrease gradually; Small displacement of the plastic concrete walls, Large displacement of reinforced concrete walls, And the value along the wall for the small law; The inclination displacement value of monitoring section 2-2 and 3-3 gradually decreases with the continuous construction, The displacement value of monitoring 1–1 section also becomes smaller in the first and middle stages of construction, But in the late construction, This shows that the horizontal displacement of the monitoring 1–1 section in the later construction period has a recovery trend; The top settlement value is larger at the 1st-3rd wall, About 6 mm–10mm, The 4–6 pin is smaller, About 4 mm–5mm, Article 7–10, the pin is directly crushed by the vehicle, Its value is approximately 6 mm–8mm.
