# 17.7: Appendix G- The Coefficient a1

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 hb/hi=1 φ 32o 37o 42o 47o 52o α δ 15o 15o 0.525 0.520 0.515 0.509 0.503 18o 0.520 0.516 0.510 0.505 0.498 21o 0.516 0.511 0.506 0.500 0.494 24o 0.511 0.507 0.502 0.496 0.490 27o 0.507 0.503 0.498 0.492 0.485 30o 0.503 0.498 0.493 0.487 0.481 30o 15o 0.526 0.522 0.517 0.512 0.506 18o 0.523 0.519 0.514 0.509 0.503 21o 0.520 0.516 0.511 0.506 0.500 24o 0.517 0.512 0.508 0.502 0.497 27o 0.514 0.509 0.504 0.499 0.493 30o 0.510 0.506 0.501 0.496 0.490 45o 15o 0.534 0.530 0.525 0.520 0.514 18o 0.531 0.527 0.522 0.517 0.511 21o 0.528 0.524 0.519 0.514 0.508 24o 0.525 0.521 0.516 0.511 0.505 27o 0.523 0.518 0.513 0.508 0.501 30o 0.520 0.515 0.510 0.504 0.498 60o 15o 0.535 0.528 0.521 0.513 0.505 18o 0.530 0.524 0.517 0.509 0.500 21o 0.526 0.519 0.512 0.504 0.494 24o 0.521 0.515 0.507 0.498 0.489 27o 0.517 0.510 0.502 0.493 0.483 30o 0.512 0.505 0.497 0.487 0.477

The weigh factor a1, for the determination of the weighted average permeability km, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=1.

 hb/hi=2 φ 32o 37o 42o 47o 52o α δ 15o 15o 0.522 0.518 0.513 0.507 0.501 18o 0.518 0.514 0.509 0.503 0.497 21o 0.514 0.510 0.505 0.499 0.493 24o 0.510 0.506 0.501 0.495 0.489 27o 0.506 0.502 0.497 0.491 0.485 30o 0.502 0.498 0.493 0.487 0.481 30o 15o 0.531 0.526 0.521 0.516 0.511 18o 0.527 0.523 0.518 0.513 0.508 21o 0.524 0.520 0.515 0.510 0.505 24o 0.521 0.517 0.512 0.507 0.501 27o 0.518 0.514 0.509 0.504 0.498 30o 0.514 0.510 0.506 0.500 0.495 45o 15o 0.554 0.550 0.546 0.541 0.536 18o 0.552 0.548 0.544 0.539 0.534 21o 0.550 0.546 0.542 0.537 0.532 24o 0.548 0.544 0.539 0.535 0.529 27o 0.546 0.542 0.537 0.532 0.527 30o 0.544 0.540 0.535 0.530 0.524 60o 15o 0.575 0.569 0.563 0.556 0.549 18o 0.571 0.566 0.559 0.552 0.545 21o 0.568 0.562 0.556 0.549 0.541 24o 0.565 0.559 0.552 0.545 0.536 27o 0.561 0.555 0.548 0.541 0.532 30o 0.558 0.552 0.544 0.536 0.527

The weigh factor a1, for the determination of the weighted average permeability km, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=2.

 hb/hi=3 φ 32o 37o 42o 47o 52o α δ 15o 15o 0.522 0.517 0.512 0.507 0.501 18o 0.518 0.513 0.508 0.503 0.497 21o 0.514 0.509 0.504 0.499 0.493 24o 0.510 0.505 0.500 0.495 0.489 27o 0.506 0.501 0.497 0.491 0.485 30o 0.502 0.498 0.493 0.487 0.480 30o 15o 0.534 0.529 0.524 0.519 0.514 18o 0.531 0.526 0.521 0.516 0.511 21o 0.528 0.523 0.519 0.513 0.508 24o 0.525 0.520 0.516 0.511 0.505 27o 0.522 0.517 0.513 0.508 0.502 30o 0.519 0.514 0.510 0.504 0.499 45o 15o 0.552 0.548 0.544 0.540 0.536 18o 0.550 0.547 0.543 0.539 0.534 21o 0.549 0.545 0.541 0.537 0.532 24o 0.547 0.543 0.539 0.535 0.531 27o 0.545 0.542 0.538 0.533 0.529 30o 0.544 0.540 0.536 0.531 0.527 60o 15o 0.580 0.575 0.570 0.565 0.559 18o 0.578 0.573 0.568 0.563 0.557 21o 0.576 0.571 0.566 0.560 0.554 24o 0.573 0.569 0.564 0.558 0.551 27o 0.571 0.566 0.561 0.555 0.548 30o 0.569 0.564 0.558 0.552 0.545

The weigh factor a1, for the determination of the weighted average permeability km, as a function of the blade angle α, the angle of internal friction φ, the soil/interface friction angle δ, for hb/hi=3.

17.7: Appendix G- The Coefficient a1 is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.