FECivil 96 Volume of Borrow скачать в хорошем качестве

FECivil 96 Volume of Borrow

📚 Introduction Think of the embankment like a “final compacted cake” of soil. • The 300,000 yd^3 is the finished compacted volume. • But what matters is the amount of dry soil solids inside that compacted fill. • The embankment’s unit weight includes water, so we convert it to dry unit weight using: γ_d = γ_t / (1 + w) • Once we know the embankment’s dry unit weight, we ask: “How much borrow soil (at 100 pcf dry unit weight) do we need to supply the same dry soil weight?” That’s why the borrow volume comes out slightly larger than 300,000 yd^3. 00:00 - Problem Statement & Given Data 00:46 - Conceptualizing the Problem (Borrow Pit to Embankment) 04:18 - The Key Geotech Principle: Constant Weight of Solids 06:37 - Locating Necessary Formulas in the FE Reference Manual 08:21 - Review of Total Unit Weight, Dry Unit Weight, and Water Content 10:46 - Deriving the Total to Dry Unit Weight Relationship (Gamma_t / Gamma_d) 14:44 - Setting Up and Solving the Governing Equation 17:42 - Solution and Final Answer ⭐ HIGH-YIELD FE NOTES (HIGHLIGHT) • Always conserve DRY SOIL WEIGHT, not total weight • If borrow dry unit weight is given, you typically don’t need borrow moisture content • γ_d = γ_t / (1 + w) is the key conversion 🎯 REQUIRED Find the borrow volume required (yd^3) to produce 300,000 yd^3 of compacted embankment. 📌 GIVEN (IMPORTANT) Embankment: • Embankment volume (compacted): V emb = 300,000 yd^3 • Embankment total unit weight: γ t emb = 120 pcf • Embankment moisture content: W emb = 16.7% = 0.167 Original soil: • Borrow dry unit weight: γ_d borrow = 100 pcf • Borrow moisture content given (not needed if dry unit weight is already given): W borrow = 18.2% ✅ KEY DEFINITIONS Moisture content (w): w = (weight of water) / (weight of dry soil) Total unit weight (γ_t): weight per volume of moist soil (soil + water) Dry unit weight (γ_d): weight per volume of dry soil solids only Core idea: To build the embankment, you must match the amount of dry soil (dry weight) needed. 📐 FORMULAS 1. Convert total unit weight to dry unit weight γ_d = γ_t / (1 + w) (w in decimals) 2. Dry soil balance (dry weight conserved) Ws= γ_d borrow * V borrow = γ_d emb * V emb So, V borrow = (γ_d_emb / γ_d_borrow) * V emb 🪜 SIMPLE 3-STEP FE PROCESS ✅ STEP 1: Convert embankment total unit weight to dry unit weight γ_d emb = γ_t_emb / (1 + W emb) γ_d emb = 120 / (1 + 0.167) γ_d emb = 120 / 1.167 γ_d emb = 102.8 pcf ✅ STEP 2: Use dry soil balance to get borrow volume V borrow = (γ_d _emb / γ_d _borrow) * V emb V borrow = (102.8 / 100) * 300,000 V borrow = 1.028 * 300,000 V borrow = 308,400 yd^3 ✅ STEP 3: Match to closest choice 308,400 yd^3 ≈ 308,500 yd^3 ✅ FINAL ANSWER ✔ B. 308,500 yd^3 🔥 HIGH-TRACTION CORE KEYWORDS (FE Construction) FE civil construction FE construction engineering FE exam construction problems construction section FE civil FE civil exam construction review FE construction easy points construction engineering FE exam FE construction management FE construction methods FE 🎯 EXAM-INTENT KEYWORDS (High Conversion) how to solve FE construction problems FE construction step by step FE construction practice problems FE construction formulas construction FE exam tricks FE construction theory questions FE construction calculations construction questions NCEES 🏗️ TOPIC-SPECIFIC HIGH-SEARCH PHRASES Earthwork & Equipment earthwork quantity calculation FE cut and fill FE exam excavator productivity FE construction equipment productivity FE cycle time calculation FE scraper dozer grader FE haul time FE exam Scheduling & Planning CPM scheduling FE exam critical path method FE float total free float FE activity network diagram FE project scheduling FE civil Gantt chart FE exam Construction Materials concrete batching FE exam slump test FE civil air content concrete FE concrete curing methods FE materials testing FE construction ACI basics FE exam Cost & Estimating construction cost estimation FE unit cost calculation FE labor productivity FE exam equipment ownership cost FE construction bid estimate FE overhead profit FE exam 🧠 EASY-POINTS & CLICK-MAGNET PHRASES FE construction easy questions construction FE exam shortcuts FE construction made easy construction FE exam in 10 minutes FE construction cheat sheet guaranteed FE construction points avoid these FE construction mistakes 📈 LONG-TAIL SEO PHRASES (Low Competition) how to calculate excavator productivity FE how to find critical path FE exam difference between total and free float FE how to compute earthwork volumes FE how to calculate construction cycle time FE how to estimate concrete quantities FE