s(r) = Q/(2πT)·ln(R/r) − Q_r/(2πT)·ln(R/r_r) (steady radial flow, superposition; heads lag the steady state with τ = 1.5 d); Q_r ≤ 0.55·Q[9]শিক্ষণৰ বাবে দৃষ্টান্তমূলক পৰিমাণ, কোনো প্ৰকৃত চাইটৰ মান নহয়।
P = 0.3·γ·H · (half span above + h) · 5 m ≥ preload; shown as % of design load 2400 kN[2]শিক্ষণৰ বাবে দৃষ্টান্তমূলক পৰিমাণ, কোনো প্ৰকৃত চাইটৰ মান নহয়।
যন্ত্ৰৰ পঠনত জোখৰ ভুল থাকে — প্ৰৱণতা পঢ়ক, একক মান নহয়।
reading = true value + N(0, σ); σ = 0.5 mm (settlement points), 1.0 mm (inclinometer)[1]শিক্ষণৰ বাবে দৃষ্টান্তমূলক পৰিমাণ, কোনো প্ৰকৃত চাইটৰ মান নহয়।
মডেলে ব্যৱহাৰ কৰা ধ্ৰুৱকসমূহ
final depth 15 m · struts at 1, 4, 7, 10, 13 m, 5 m apart along the wall, crew starts 0.5 m below a level and needs 2 days · over-excavation allowance 4 m unsupported · wall 0.8 m concrete (EI = 1.28 GN·m²/m per m) · γ = 19 kN/m³ · building 12 m long, near edge 6 m behind the wall · water table 1 m · aquifer T = 300 m²/d, R = 400 m, excavation radius 12 m, recharge line 4 m behind the wall (effective radius 3 m) · clay 5 m above the aquifer, m_v = 0.2 /MPa, c_v = 0.15 m²/d · ground factors lognormal (σ 0.10 wall, 0.15 m_v, 0.20 c_v) · base unworkable below FS 1.05 · recharge capped at 55 % of the water pumped (supply from the discharge, well clogging)শিক্ষণৰ বাবে দৃষ্টান্তমূলক পৰিমাণ, কোনো প্ৰকৃত চাইটৰ মান নহয়।
R. B. Peck — Deep excavations and tunneling in soft ground (apparent earth-pressure diagrams for braced cuts) — Proc. 7th ICSMFE, Mexico City, State-of-the-Art Volume, 225–290, 1969
G. W. Clough, T. D. O'Rourke — Construction induced movements of in-situ walls (system stiffness EI/(γw·h⁴), settlement envelopes) — ASCE Geotechnical Special Publication 25, Design and Performance of Earth Retaining Structures, 439–470, 1990
C.-Y. Ou — Deep Excavation: Theory and Practice (upheaval / uplift check against a confined aquifer, dewatering, strut preload) — Taylor & Francis, 2006