Consider the following statements concerning engineering geology:1. D...
Engineering Geology
Engineering geology is a branch of geology that deals with the study of the behavior of rocks and soils present in the earth's crust in relation to civil engineering projects. It involves the investigation, analysis, and interpretation of geological data to provide a sound foundation for engineering design and construction.
Correct Statements
1. Construction of a major dam must be preceded by thorough geotechnical investigations.
2. In general, igneous rocks are hard and are suitable for construction of large hydraulic structures.
Explanation
1. Construction of a major dam must be preceded by thorough geotechnical investigations: Geotechnical investigations are essential to assess the suitability of the site for construction of a dam. The investigations involve the study of geological, hydrological, and geophysical aspects of the site, which helps in determining the stability, seepage, and foundation conditions of the site. Thus, this statement is correct.
2. In general, igneous rocks are hard and are suitable for construction of large hydraulic structures: Igneous rocks are formed from the solidification of molten magma and are generally hard and durable, making them suitable for construction of large hydraulic structures like dams. Thus, this statement is correct.
Incorrect Statements
1. Dams on sedimentary impervious strata dipping upstream will be unsafe: This statement is incorrect. Sedimentary rocks can be impervious and can be used as a foundation for dams. However, the stability of the dam depends on the orientation of the layers. If the layers are dipping upstream, it can lead to instability and seepage issues, which can compromise the safety of the dam.
4. Construction of dams is never indicated in any active zone of seismicity: This statement is incorrect. Dams can be constructed in seismic zones with proper design and construction techniques. However, the seismic hazard assessment and design of the dam should be carried out with caution to ensure the safety of the dam and the surrounding area.
Conclusion
In conclusion, statement 1 and 2 are correct, while statements 3 and 4 are incorrect. Engineering geology plays a vital role in providing a safe and stable foundation for civil engineering projects like dams. Thorough geotechnical investigations and proper design and construction techniques are necessary to ensure the safety and long-term stability of such structures.
Consider the following statements concerning engineering geology:1. D...
Engineering Geology is the science of Earth (Ego-Earth, logos-study of science). This deals with the application of geological knowledge in the field of civil engineering for execution of safe, stable and economics construction like dams, bridges and tunnels.
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