Sheet Pile Wall Section Modulus

The strength of sheet piling to resist bending is a combination of the shape of the section and the material out of which it is made.

Sheet pile wall section modulus.

Z sheet pile z sections are considered one of the most efficient piles available today. Based on the prototype retaining wall with a height of 12 meters the model tests with a geometric similarity ratio of 7 are designed and we focus on the model production and analysis on the test results. Some comparative analyses between the measured values and the calculation values by. Moment of inertia about the main neutral axis y y.

The major difference is that i moment of inertia is used for more general calculations. This section subsequently became the all time most popular sheet piling section in history. The plastic section modulus can be up to 25 higher than the elastic section modulus which leads to a significant reduction of the overall cost lighter sheet piles. Mass per single pile.

Cross sectional steel area. Both the allowable bending moment and the section modulus are specified as per lineal foot or meter of wall. Section modulus 650 k ft ft x 12 in ft 31 2 k in 2 therefore the required section modulus is 250 in 3 ft the us army corps of engineers design of sheet pile walls engineer manual from 1994 recommends accounting for a safety factor for the allowable bending stress of 50 50. When calculating the stress in a steel pile for example the formula using i is.

Both the moment of inertia and the section modulus are measurements of the relative stiffness of a cross section of steel piling. Section modulus in3 sheet cm3 sheet moment of inertia in4 sheet cm4 sheet coating area pile lb ft kg m wall lb ft2 kg m2 both sides ft2 ft of single m m wall surface ft2 ft2 of wall m2 m2 ps 27 5 19 69 500 0 4 10 2 20 3500 30 9 14 8 09 171 2 45 1 67 1 27 5 134 3 3 3 54 5 3 221 3 65 1 11 1 11 1 11 ps 31 19 69 500 0 5 12 7 20 3500 30. Mass per m of wall. Stress m y i.

Having the interlocks located at the outer fibers of the wall assures the designer of their published section modulus. The allowable stress of the material is a function of the material itself. A new type of retaining wall the sheet pile wall with a relieving platform is introduced in this paper. Ec 3 5 considers both plastic as well as elastic sections modulus wpl or wel which depend on the classification of the section.

Ec 3 5 considers also several reduction factors. When the pz 27 section was introduced in the 1940 s its section modulus of 30 2 in3 ft was almost three times that published for the arch section with the identical weight per square foot of wall. Hence f a 50 x ksi of the given steel grade.