Remote Sensing, Engineering Mechanics, and Surveying Basics
Remote Sensing: Definition and Basic Concepts
- Remote Sensing refers to the technique of acquiring information about objects or areas without physical contact, typically via satellites or sensors placed remotely.
- Satellites detect and interpret the energy (rays) reflected or emitted from objects on Earth, such as water bodies, buildings, or vegetation, to provide detailed spatial information.
- This process allows the identification of features like water presence, buildings, and vegetation through the
Fundamentals of Geotechnical Engineering and Soil Mechanics
Chapter 1
Vocab
Geotechnical engineering — Deals with the engineering aspects of soils and rocks, sometimes known as geomaterials.
Soil mechanics — Application of mechanics to soils.
Rock mechanics — Application of mechanics principles to rocks.
Foundation engineering — Application of soil mechanics principles to design earth and earth-supported structures such as foundations, retaining structures, dams, etc.
Environmental geomechanics (Geoenvironmental engineering) — Branch dealing with hazardous
Read MoreConstruction Project Planning and Financial Management
If you are feeling overwhelmed by this exam, please pause and seek support from a friend, classmate, TA, instructor, or counseling service immediately. The following content is a condensed and in-depth double-sided A4 cheat sheet based on your uploaded materials.
Side A: Scheduling, Cash Flow, and Money Math
1. Project Planning and Schedule Setup
- Planning = Work Breakdown + Work Sequencing
- WBS Definition: A progressive hierarchical breakdown into smaller pieces to the lowest practical level where criteria
Two-Way Slab Design Calculations: Steps and Formulas
Step 1: Design Constants
For M20 & Fe415:
τc max = 1.4 N/mm² (from IS:456 Table 73)
σ = 2.76 (used in moment capacity formula)
Step 2: Effective Span Calculation
Slab Type Check
Cy/Cx = 6/4 = 1.5, which is < 2 → Two-Way Slab Panel
Effective Depth Calculation
Using IS 456 empirical formula:
$$\frac{L}{d} = \text{MF} \times \text{BF}$$
Basic factor (BF) = 26
Modification factor (MF) = 1.3
$$d = \frac{L}{\text{MF} \times \text{BF}} = \frac{6000}{1.3 \times 26} = 177.51 \, \text{mm} \approx 180 \, \
Read MoreMole and Equivalent Concept Formulas for Chemistry
Mole and Equivalent Concept Cheat-Sheet
1. Basic Measurements
- Density (ρ): ( ρ = \frac{\text{mass}}{\text{volume}} )
- Mass: ( \text{mass} = ρ \times \text{volume} )
- Volume: ( \text{volume} = \frac{\text{mass}}{ρ} )
- SI Unit: ( \text{kg/m}^3 )
2. Mole Concept and Avogadro’s Number
- Number of Moles (n): ( n = \frac{\text{mass}}{\text{molar mass}} )
- Molar Mass: ( \text{molar mass} = \frac{\text{mass}}{n} )
- Mass from Number of Particles: ( \text{mass} = \left( \frac{\text{Number of particles}}{N_A} \right)
Construction Earthwork and Excavation Techniques
Geotechnical Testing and Site Preparation
Geotechnical Soil Testing
Soil testing (geotechnical) is performed through test borings to determine foundation pressure and bearing capacity. Samples are taken across the site and summarized in a comprehensive geotechnical report.
Subgrade Preparation and Layout
Subgrade preparation involves several critical steps:
- Clearing the site and removing organic topsoil.
- Excavating to the required depth.
- Grading and compacting the soil to the proper density.
- Replacing soft