Instructions on Sheet Pile Construction

Instructions on Sheet Pile Driving

In construction, to reduce the water impact against steel sheet piles, first should drive piles starting from the upstream and inside of river, then pile the river downstream and outside. In piling, use construction techniques combined with press and drive way.

When need to prolong steel sheet piles by welding, must use same type, same strength. In welding, firstly butt welding or seam-weld interlockings, then weld sheet piles. Joints of the adjacent steel sheet piles must be dislocated more than 6m and shall not exceed 50% in the same plane.

Instructions on Purlin and Support Installation

Cofferdam is the sheet pile walls that form into a circle. For safe and stable sheet pile project , usually it requires steel purlin and inside steel support. Producing and processing of purlin and inside support should be combined by the situation in plant and construction site. And should be uniform and in accordance with universal standard. When items or parts made by factory transported to the construction scene, must be assembled as a whole at the site in order to ensure accurate structure and size.

Processing of steel purlin parts must be finalized to complete on the model pedestal .

Basic methods to install purlin is to use steel casing with concrete piles to support pole beams, use pole beams, jacks and mandrel hanger system to layered lift and decentralize purlin and finally fix it to the casing.

Permeability Proof and Anti-Leakage Treatments

A. In all processes of steel sheet pile driving, must use guide and oriented device, strictly control the vertical degree at both sides to make interlockings connected very closely between piles. Because assurance of sheet pile’s vertical degree and be close around the purlin are the key points to avoid permeability and leakage.

B. In pit’s pumping, for leakage from loose interlockings, use cotton with rich fiber to plug and block.

C. For wide slit between piles, use flax roots mixed with butter to stuff and seal the seam to aovid permeability and leakage, or use fly ash, saw wood foam and expansive cement to scatter along the pile surface in the flow direction outside the cofferdam.