🕑 Reading time: 1 minuteStability evaluation of gravity concrete structures such as dams, retaining walls due to various reasons with methods and procedures of stability evaluation is discussed.
- Stability Evaluation of Gravity Concrete Structures
- Methods and Procedures for Stability Evaluation of Gravity Concrete Structures
Stability Evaluation of Gravity Concrete StructuresStability evaluation of concrete gravity structures such as dams and retaining walls may be required because of project modifications, changes in site conditions, enhanced knowledge of site data, or changes in the stability criteria. Stability refers to resistance against sliding, floatation, limit on the eccentricity of the resultant applied loads, and limit on the bearing capacity of the foundation materials. Since, changes to enhance the stability of an existing gravity concrete structure for example dams, retaining walls, floodwalls, and pumping stations is costly and expensive. Therefore, a systematic and phased assessment process must be employed to specify whether the structure needs stability improvement or not. To prevent modifications, which may not be required, all sorts of resisting actions such as vertical friction, side friction, or three dimensional effects should be considered. If the stability of an existing gravity concrete structure does not meet the specifications of a new construction, it might not be required to improve its stability specifically if the structure does not show any stability issues or its life span is not long. Procedures for stability estimation and improvement of existing gravity concrete structures is discussed in the following sections.
Fig.1: Gravity Concrete Structure – Hoover Dam
Methods and Procedures for Stability Evaluation of Gravity Concrete StructuresFollowing are the procedures for stability evaluation of existing gravity concrete structures:
- Phase I: Preliminary analysis and evaluation
- Phase II: Study, investigation, and comprehensive analysis
- Phase III: Advanced analytical studies and reliability analysis