《工程地质手册》P270~P271 式(3-6-15)、式(3-6-16)和式(3-6-17)
试验 | δ(KPa) | τ(KPa) |
---|
1 | (50 + 300sin(20))/0.25 = 610.42 | 300cos(20)/0.25 = 1127.63 |
2 | (100 + 342sin(20))/0.25 = 867.88 | 342cos(20)/0.25 = 1285.50 |
3 | (150 + 375sin(20))/0.25 = 1113.03 | 375cos(20)/0.25 = 1409.54 |
4 | (200 + 423sin(20))/0.25 = 1378.70 | 423cos(20)/0.25 = 1589.96 |
5 | (250 + 468sin(20))/0.25 = 1640.26 | 468cos(20)/0.25 = 1759.10 |
| δ(KPa) | τ(KPa) |
---|
xˉ | 1122.058 | 1434.346 |
δ | 363.55 | 222.05 |
mδ | 162.58 | 99.30 |
xˉ−3δ−3mδ | -456 | 471 |
xˉ+3δ+3mδ | 2700 | 2397 |
无需舍弃数据
i=1∑nδi=610+868+1113+1378+1640=5610 i=1∑nδi2=6102+8682+11132+13782+16402=6955930 i=1∑nτi=1128+1286+1410+1590+1759=7171 i=1∑nδiτi=610×1128+868×1286+1113×1410+1378×1590+1640×1759=8450307 tanϕ=5×6955930−561025×8450307−5610×7171=0.611 ϕ=31.42° c=5×6955930−561026955930×7171−5610×8450307=748.21