1. Sheet pile retaining wall systems:

1.1. Explain what the process is for installing and removing a sheet pile retaining wall system.

1.2. What are some of the benefits and limitations of this system? Justify your answer in a complete sentence.

2. Soldier pile and lagging retaining wall systems:

2.1. Describe what a soldier pile and lagging retaining wall system is. How does each part (soldier pile vs. lagging) function?

3. Soil Nail vs. Soil tieback:

3.1. What is the primary difference between a soil nail and a soil tieback?

4. OSHA Timber Trench Shoring Tables: Using the attached OSHA Timber Trench Shoring Table C-2.2 (attached) design three alternate options for a wood shoring system in

Type B soil for a trench that is

17 ft deep and

7 ft wide.

4.1. Describe each completely. Name them Alternate #1, #2 and #3.

5. Secant pile wall: (Use complete sentences.)

5.1. Explain what a secant pile wall system is.

5.2. Describe the process for installation of a secant pile wall.

OSHA Shoring Tables Exercise using Table C-2.2 Timber Trench Shoring - Minimum Timber Requirements * Soil Type B P = 45 X H + 72 psf (2 ft. Surcharge) DEPTH SIZE (ACTUAL) AND SPACING OF MEMBERS CROSS BRACES WALES TRENCH (FEET) UPRIGHTS WIDTH OF TRENCH (FEET) HORIZ SPACING (FEET) VERT SPACING (FEET) SIZE (IN.) VERT SPACING (FEET) MAXIMUM ALLOWABLE HORIZONTAL SPACING (FEET) UP TO 4 UP TO 6 UP TO 9 UP TO 12 UP TO 13 CLOSE 2 4 6 5 UP TO 6 486 4x6 686 636 5 6x5 5 3.12 4x12 TO UP TOS 4x6 426 6x6 6x6 5 SxS 5 10 UP TO 10 4x6 436 6x6 6x6 6x$ 5 8x10 5 5 4x8 See Note 1 1 10 UP TO 6 6 6x6 636 6x6 6x5 5 SxS 5 4x10 TO UP TOS 6x6 6x6 5 10x10 4 x 10 15 UP TO 10 6x6 6x6 8x5 S:$ 5 10x12 5 4 x 10 Soo Note 1 15 UP TO 6 6x6 6x6 Sxs 5 8x10 5 TO UP TO 8 6x6 6x5 6x6 3x3 $$ 5 10x12 3 4X6 20 UP TO 10 Sxs 3x3 8x$ 3x3 Sxs 5 12x12 5 Soo Noto 1 OVER 20 SEE NOTE 1 *Douglas fir or equivalent with a bending strength not less than 1500 psi. ** Manufactured members of equivalent strength may be substituted for wood