Interlocking locks are the core parts of plastic composite sheet pile retaining systems.
They bear structural loads and block water seepage.
These products are widely used in river regulation, cofferdam projects and old water system renovation.
1. Core Design Principles of Interlocking Locks
The lock is integrally extruded with male and female tenon-and-groove structure. It has three key design highlights:
Mechanical interlocking function
The tenon and groove lock each other tightly. All single sheet piles are connected into a whole wall. It evenly spreads lateral soil and water pressure, and prevents piles from tilting or bulging outwards.
Automatic deviation correction
Built-in guide and limit slopes can correct pile position during driving.
It reduces construction errors on soft soil and backfill ground, and keeps lock gaps uniform and tight.
Labyrinth anti-seepage cavity
The folded labyrinth cavity extends the seepage path and reduces water pressure.
It forms the first physical waterproof barrier to slow down water infiltration.
2. Double-layer Waterproof Sealing System
We match water-swellable sealing strips with the lock structure to build dual protection.
The strips expand quickly when touching water and fill all tiny gaps inside locks.
When the foundation has slight settlement or tiny deformation, flexible sealing strips can adaptively seal the gaps.
This function stops fine soil from washing away, and avoids piping, bank slope collapse and erosion risks.
3. Outstanding Advantages vs Traditional Steel Sheet Piles
Strong corrosion resistance
Polymer integrated locks never rust or deform after long-term underwater use. The size stays stable permanently.
Easy construction
It has high construction tolerance. Workers can finish locking and installation efficiently on site.
Eco-friendly performance
All sealing accessories are non-toxic and pollution-free, which will not contaminate river water.
As long as we control production precision and standard pile driving operation, the plastic composite sheet pile revetment can run stably and completely leak-free for decades.
