Lead hole is used when asteel sheet pile cannot be driven. When a steel sheet pile is driven to thegranite layer, it can hardly be driven using static pressure method orhammering method, and a lead hole is needed.It should be indicated in the geologicalinvestigation report and determined during piletest.

According to geological condition, it may be slow or hard todrive the pile when the value N exceeds 15; if the soil layer is too hard, astatic pressure pile driver should be adopted. Steel sheet pile supporting is used for deep foundation pitwhose depth exceeds 5m and is a type of continuous protection.

The steel sheet pile is similar toU-shaped steel, but it is wider and deeper than U-shaped steel, its section isa trapezoid, panel thickness is about 25mm, width isabout 3m, and length is 6-9m and even exceeds 12m (special-made).

When supporting a steel sheet pile, carryout positioning and layout first. Then, drive the first gaugepile using piledriver or excavator.The subsequent piles should be fastened with the first pile oppositely andcontinuously driven in the ground to effectively support the foundation pitwall.

The piles are fastened one in front and one in reverse, one in reverse and one in front, and continuously driven into the ground along the laying line to form effective support for the foundation pit wall.

Application of steel sheet pile

Function, appearance and application value are criteria forselecting building materials. The steelsheet pile meets the aforesaid three requirements: Its manufacturing componentsoffer simple and useful structures and meet all safety and environmentalprotection requirements, and the buildings with steel sheet piles are quiteattractive.

The steel sheet pile has been applied to the whole constructionindustry, including traditional hydraulic and civil engineering, railways andtram rails and pollution control.

The practical value of steel sheet pileis reflected in the reform of many new products, e.g.: Some special weldedbuildings; metal sheets produced using hydraulic vibratory hammer; sealed watergates and treatmentof production coatings.

Many factors ensure the most useful manufacturing component ofsteel sheet pile, that is, It is conducive to not only excellent quality ofsteel, but also research and development of the steel sheet pile market andoptimal design of product characteristics to better satisfy user needs.

The development of sealing and overprinting process is a goodexample of this aspect. e.g.: TheHOESCH patent system opens up a new field of steel sheet pile in pollutioncontrol.