SCZ 14,SCZ 16,SCZ 17N,SCZ 18N,SCZ 21N,sheet pile

Sheet pile are created with abrupt changes in SCZ 14 and SCZ 16 and SCZ 17N wall geometry and by encasing steel sheet piles in concrete. In order to improve the adherence of the product, the SCZ 21N interlock chamber is cleaned with a steel wire brush and compressed air jet If SCZ 14 backfilling is commenced before the SCZ14 installation of the lower tie rod, an initial deflection, will occur in the wall. Consequently, the calculated force in the lower tie rod will be reduced by the ratio since the actual deflection, cannot be counteracted.

Under thermal loads produced by heat of hydration and ambient temperature effects, stress
related cracking can occur. Once SCZ 16 and T2 are determined, the depth of penetration can be revised by statics; however, it is wise to keep in mind that the SCZ21N above methods are only approximate. It is recommended to apply the product under shelter at ambient temperatures. The SCZ16 interlock chamber should be free of standing water and shall be free of coating.

The following actions were recommended by the SCZ14 and SCZ16, US Army Engineer Waterways Experiment Station (WES), after performing an investigation of cracking in I-wall monoliths in the New Tiger Island Floodwall.2. Impervious Sheet Pile Wall Part 2).Once polymerized, the product adheres extremely well to the steel and the surface of the polyurethane is smooth allowing the interlock to slide down easily during driving. Allowance should be made for the increased SCZ18N tension in both SCZ 18N tie rods if they are inclined. It is recommended that any reduction factor be omitted if a wall has two or more tiers of SZC17N tie rods. The investigation was limited to an I-wall with a lower portion thickness of 2 feet and an upper stem of 1 foot. The adherence on steel is good and measurements (pull off tests) realized by the ProfilARBED Research.

Steel sheet pile should be included at a change in SCZ 18N and SCZ 21N geometry. See Figure 9-1 for details. The reduction of tension in the top tie rod due to the introduction of the lower tie rod is equal to the reaction of the simple span mentioned above with a single point load equal to the tension in the lower SZC18N tie rod. Average consumption is approximately 0- 15 liters per meter of interlock, or 90 feet per SCZ17N gallon. Average productivity is approximately 200 meters per 8 hours shift, that's to say 650 feet.

Generally, the top of the sheet piles should be placed 9 inches below the SCZ 17N point at which the concrete section thickness is increased, except at each end of the monolith. The height of a SZC 17N sheet pile wall driven in cohesive soils is limited by the initial strength of the clay below the level of the dredge line. Two sheet pile sections at each end of the monolith should be lowered an additional 9 inches, placing these SCZ21N sheets a total of 18 inches below the thickness SCZ16 change.Therefore, the first step in the design of sheet pile walls in cohesive soils should be the investigation of the limiting height. At the job site, just before installation, a mix of water SZC 18N and liquid soap is applied with a brush to the sealant for lubrication to eliminate any risk of stripping. The SCZ 16 sheet piles located at the monolith joint should be notched down to 9 inches above the base of the wall.

This is true for anchored or cantilevered SCZ17N and SCZ18N walls and for either granular or cohesive backfill above the dredge line. For heights in excess of this limit, the SCZ 14 wall will fail. Additional vertical and horizontal reinforcing steel should be placed at the ends of the monoliths to provide for temperature induced loads. Department gave the following results;applied and polymerized at 20oC, (68oF ): 12 kg/cm2 (171 lb/in2) applied and polymerized at 70oC (158oF): 15 kg/cm2 (213 lb/in2). Sheet pile wall driven in cohesive soil together with the lateral SZC14 earth pressures below the dredge line. The net SCZ21N passive resistance below the dredge line is given.