Steel Sheet Pile Inspection, Hoisting, And Stacking in The Steel Sheet Pile Construction Specification

1. Inspection of steel sheet piles

For steel sheet piles, there are generally material inspections and appearance inspections in order to correct unqualified steel sheet piles and reduce difficulties in the piling process.

(1) Appearance inspection: including surface defects, length, width, thickness, end rectangle ratio, straightness and lock shape, etc. Note:

a. Welding parts that affect the driving of steel sheet piles should be cut off;

b. Cut holes and section defects should be reinforced;

c. If the steel sheet pile is severely corroded, the actual section thickness should be measured. In principle, all steel sheet piles should be inspected for appearance quality.

(2) Material inspection: conduct a comprehensive test on the chemical composition and mechanical properties of the base material of the steel sheet pile. Including chemical composition analysis of steel, tensile and bending tests of components, lock strength test and elongation test, etc. At least one tensile and bending test shall be carried out for each specification of steel sheet pile: two test pieces shall be carried out for every 20-50t steel sheet pile.

2. Lifting of steel sheet piles

The loading and unloading of steel sheet piles should be carried out by two-point hoisting. When lifting, the number of steel sheet piles should not be too much each time, and care should be taken to protect the lock to avoid damage. Lifting methods include bundled lifting and single lifting. Bundled hoisting is usually tied with steel cables, while single hoisting usually uses a special spreader.

3. Stacking of steel sheet piles

The place where the steel sheet piles are stacked should be selected on a flat and firm site that will not undergo large subsidence deformation due to pressure, and it should be easy to transport to the piling construction site. When stacking, pay attention to:

(1) The order, position, direction, and plane layout of stacking should take into account the future construction;

(2) The steel sheet piles are stacked separately according to the model, specification, and length, and signs are set up at the stacking place to explain;

(3) The steel sheet piles should be stacked in layers, and the number of stacked piles in each layer generally does not exceed 5. Sleepers should be placed between each layer. The distance between the sleepers is generally 3~4m, and the upper and lower layers should be on the same vertical line. The total height of stacking should not exceed 2m.