Sheet Pile Support Construction Points

For construction projects that need sheet pile as support, here are nine main construction points to smooth the whole construction:

1. Inspect and correct sheet piles, including test its length, width and thickness, in addition to visual inspection, other deficiencies must be corrected too.

2. In sheet pile insertion and play,  put line by measurement and try to pile vertically. The pile position deviation should be less than 50mm, the vertical degree of deviation less than 1%. Should start by the river, and finally be closed far from the river, so as to prevent the small toe mouth of sheet pile leaks by the river side.

3. At the lockings of two sheet piles, put on some butter to facilitate the play and pull, while prevent water seepage.

4. In sheet pile cofferdam, excavation needs a long time, there is large soil lateral pressure. In order to ensure sheet pile stability, according to the design , excavation depth should be 50cm lower than that in each purlin support. Timely add purlin bracing for support. Until the reinforcement completed at this layer, start excavation for stability.

5. Make sure level status for inside support to prevent accident from local deformation by the force discontinuity.

6. Inside the cofferdam, components within the support must be welded solid. Non-dense places between sheet piling and purlin need to work closely with the steel packing to avoid local buckling.

7. When excavate to the end of pile cushion, should immediately pour concrete manor to prevent boiling occurs in substrate by the constant term of water soaking, which would affect the overall pit stability.

8. At the four sides of base should set drains, water wells to ensure the water can flow out of the pit timely.

9. Do not remove sheet pile untill main structure construction  and soil’s backfilling completed. But also consider the impact of pile-removing at the surrounding environment, timely adjust the removal rate. Cavity after pile removal should be timely compacted by yellow sands to prevent the surrounding soil subsidence.

Note : the article is excerpted from Sheet Pile Support Construction Points