Anchorage - Tie-rods

Anchors For Marine Structures M64 – M170 in accordance with EN1993-5

Anker Schroeder anchors for marine structures

 

Anker Schroeder manufacture anchors for retaining structures such as quay walls, abutments, berths and crane runways. Our anchors range in diameter from M64 to M170 and can be supplied in grades 355, 460, 500 & 700. Anker Schroeder anchors are manufactured from round steel bar with forged or threaded ends that allow a variety of connections to be made to sheet piles, tubes, H-piles, combi-walls and diaphragm walls.

Depending on diameter and length required Anker Schroeder tie bars are manufactured using selected fine grained steel, high strength low alloy steel or quench and tempered steel. The choice of steel is dependent upon your specific project requirements but the above minimum properties will be met. All tie bars and components are manufactured to a quality system audited and accredited to ISO 9001 and meet the requirements of EN1090 and are CE marked (a legal requirement for supply into the European market).

Anker Schroeder

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en English ASDO-Anchors-for-Marine-Structures-English_2020-web.pdf us English (USA) ASDO-Large-Dia-tie-bars-for-Marine-Structures-USA_2016-web.pdf de German ASDO_Anker_Handbuch_2013.pdf fr French ASDO_Ancrages-Pour-Structures-Maritimes_FR_2013.pdf es Spanish ASDO_Tirantes-De-barra-Para-Estructuras-Marinas_SP_2013.pdf
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Corrosion resistance – for robustness and simplicity in handling and installation use sacrificial steel. The tie bar is split into zones as per the diagram below. The corrosion rate assumed for each zone depends on local conditions, or the guidance given in EN1993-5 can be considered. The rates given below are for example only.

Each zone is considered in turn and the expected corrosion rate added to the minimum size, as per the table below. Note the corrosion rate assumed for zone one can be reduced considerably by placing the anchor connection head behind the sheet pile pan as shown on page 12 and detail Z page 20.

Connections to sheet piles 

Forces are transferred from the sheet pile to the anchor bar through waling sections that run the length of the wall. At the front wall these are normally placed behind the wall (i.e. earth side) and at the anchor wall the non-bearing side.

Connections to high modulus piles 

Anchor forces are generally high and articulated connections are recommended to minimize bending at the connection. Articulation can be provided that allows movement in the vertical direction or in all directions.

Anker Schroeder can supply complete waling systems to suit a variety of wall configurations. Waling usually comprises of two rolled steel channel sections placed back to back and spaced to allow the tie rods to pass between the channels. This spacing must allow for the diameter of the tie rod and the thickness of any protective material applied to the rod and take into account any additional space required if the tie rods are inclined and need to pass between the walings at an angle.