1 Introduction
2 Background
2.1 Stress State in the Pile Foundation
2.2 Thermodynamic Cycles in CAES
2.2.1 Compression Process
2.2.2 Cooling Process
2.2.3 Heating Process
2.2.4 Expansion Process
3 Determination of the Air Pressure
3.1 Energy Supply and Demand
3.2 Design of the Pile Foundation
N | NEd (kN) | np | Np (kN) | do (m) | Lp (m) | Qb (kN) | Qs (kN) | Qall (kN) | Np/Qall | Maximum di (m) |
---|---|---|---|---|---|---|---|---|---|---|
5 m × 5 m column spacing (Atr = 25 m2) | ||||||||||
2 | 650 | 1 | 650 | 1 | 6.5 | 1286 | 364 | 671 | 0.97 | 0.93 |
4 | 1300 | 2 | 650 | 1 | 6.5 | 1286 | 364 | 671 | 0.97 | 0.93 |
6 | 1950 | 3 | 650 | 1 | 6.5 | 1286 | 364 | 671 | 0.97 | 0.93 |
8 | 2600 | 3 | 867 | 1 | 9 | 1286 | 653 | 864 | 1.00 | 0.91 |
10 | 3250 | 3 | 1083 | 1 | 11.5 | 1286 | 1023 | 1111 | 0.98 | 0.88 |
6 m × 6 m column spacing (Atr = 36 m2) | ||||||||||
2 | 936 | 1 | 936 | 1 | 10 | 1286 | 791 | 956 | 0.98 | 0.90 |
4 | 1872 | 2 | 936 | 1 | 10 | 1286 | 791 | 956 | 0.98 | 0.90 |
6 | 2808 | 3 | 936 | 1 | 10 | 1286 | 791 | 956 | 0.98 | 0.90 |
8 | 3744 | 3 | 1248 | 1 | 13 | 1286 | 1285 | 1286 | 0.97 | 0.86 |
10 | 4680 | 4 | 1170 | 1 | 12.5 | 1286 | 1195 | 1225 | 0.96 | 0.87 |
7 m × 7 m column spacing (Atr = 49 m2) | ||||||||||
2 | 1274 | 2 | 637 | 1 | 6 | 1286 | 316 | 639 | 1.00 | 0.93 |
4 | 2548 | 3 | 849 | 1 | 9 | 1286 | 653 | 864 | 0.98 | 0.91 |
6 | 3822 | 4 | 956 | 1 | 10 | 1286 | 791 | 956 | 1.00 | 0.90 |
8 | 5096 | 4 | 1274 | 1 | 13 | 1286 | 1285 | 1286 | 0.99 | 0.86 |
10 | 6370 | 4 | 1593 | 1 | 16.5 | 1286 | 1971 | 1628 | 0.98 | 0.82 |
3.3 Calculation of Storage Pressure
4 Analytical Models
5 Analtical Results
5.1 General Response from Elastic Analyses
5.2 Stress Distribution along Radial Direction
5.3 Stress Distribution along Longitudinal Direction
5.4 Soil-Structural Interaction
5.5 Parametric Results
ri (mm) | ft,out (Mpa) | ρh,min | ft,in (Mpa) | ρh,max | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
N = 2 | N = 6 | N = 10 | N = 2 (%) | N = 6 (%) | N = 10 (%) | N = 2 | N = 6 | N = 10 | N = 2 (%) | N = 6 (%) | N = 10 (%) | |
100 | 8.57 | 8.10 | 7.05 | 2.9 | 2.7 | 2.3 | 0.64 | 0.60 | 0.52 | 3.8 | 3.6 | 3.1 |
150 | 5.58 | 5.28 | 4.64 | 1.9 | 1.8 | 1.5 | 0.90 | 0.85 | 0.74 | 5.4 | 5.1 | 4.4 |
200 | 4.42 | 4.19 | 3.69 | 1.5 | 1.4 | 1.2 | 1.20 | 1.14 | 1.00 | 7.2 | 6.8 | 6.0 |