Praeter Engineering Limited have just successfully completed another secant pile crack resin injection project in Central London.

Praeter were called by a regular client to urgently attend site to solve the problem of leaking secant wall piles, this was preventing the client from handing over the area. Water leaks through the piles due to the high static head of the adjacent water table that is being retained behind the piles. Any small deficiency in the concrete pile forming process can allow water ingress through the weakest point, continued ingress will open up the crack further.

Praeter begin the process by carrying out a site survey to identify which piles need injection, piles are then clearly marked up and drilled around and through identified cracks in the piles. Injection lances are screwed into the piles and polyurethane resin is injected into the piles under pressure.

The water elastic resin stops active leaks and seals cracks permanently and elastically, when the resin comes into contact with water it reacts to create a highly elastic foam and remains permanently elastic after reacting. The elastic behaviour of the resin means that the resin can adapt to any movements in the pile cracks and ensure the crack remains sealed.

Praeter’s use of highly experienced operatives and quality products ensures that once the injection process has been carried out the area will remain sealed for the foreseeable future.

If you would like further information on how Praeter Engineering can help you confidentially on your next project please get in touch.