POLISTEEL

POLISTEEL

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Polisteel modular expansion joints

Polisteel lamelne dilatacijeMore lamella divides time stezaja and stretching superstructure relative to the bridge abutment, forming individual gaps through which you can drive safely and comfortably. Gaps are closed watertight seal profiles. Polisteel expansion joints are silent and rigid construction of a long life. The result is a highly developed POLISTEEL design..
  • Shifts and swing are possible in all three directions, or axes
  • All components POLISTEEL modular expansion joints are made of high quality materials, manufactured under modern quality assurance system according to ISO 9001:2008 and HTD13/001, and have been successfully tested for mechanical strength, wear and fatigue in Croatian and European testing laboratories.
  • Thanks avoiding welds in support profile devices, POLISTEEL modular expansion joints achieve high strength and durability. All steel profiles are made by extrusion in the hot state of the material S355J2 + N
  • All wear parts are replaceable
  • POLISTEEL modular expansion joints have disconnected or movable steel parts, which are susceptible to frequent load changes. Shifts and turns take place only between PTFE and stainless steel or flexible elastomeric parts and synthetic materials
  • Thanks to the elastic bearings to dampen shock and vibration, and enable greater progress in the transverse direction of the bridge and vertical displacements and Swing
  • management gap width POLISTEEL modular expansion joints with the elastic rubber distance holders. On one hand, this control extends the lifespan of the entire structure, it helps muffle impulsive impact traffic. On the other hand through the elastic management can effectively prevent damage to the construction of "blocking" specific gaps (eg entrapped foreign bodies)
  • To install POLISTEEL modular expansion joints in bridges and abutments, are required only relatively small openings. Can be largely adapted to local circumstances, thanks to the asymmetric distribution box girders

 

Main features

Model series is arranged according to the number of elastomeric waterproof sealing profile. It is modularly structured and begins to type PS 80 with an elastomeric waterproof sealing profile. On the previous page shows a sketch Joints PS 560 with seven elastomeric sealing waterproof profile. Roads stretching the scope of the planned elastomeric waterproof sealing profile. If for example the planned scope of elastomeric waterproof sealing profile 80 mm, then it is time for expansion Joints PS 560-7 × 80 = 560 mm.
Joint width f is changing movement joints. At a minimum joint width fmin the steel sections touching. For maximum joint width fmax opens the gap between the steel profiles at 65, 70 or 80 mm according to the planned default data. As the examples given in Table 1 lists the joint width depending on the width of a single joint (f0, f5, f65, f80).
Modular joints allow movements in all three directions (ux, uy, uz) and rotation around all three axes. Thanks to the elastic bearings and elastic damping possible shifts slats and beams in the transverse direction (ey)and in the vertical direction (uz) of the bridge.

The assumption that a longer life is modular expansion joints avoiding dynamic loads, which can significantly reduce the system of springs and shock absorbers. This protects that expansion, as well as parts of the surrounding buildings, and greatly extends their lifespan.

If the direction of movement of the bridge at the site of dilation is at an angle of 90o, then Joints prepared for such a move. If necessary, you can create and schedule hair lamellar expansionrelative to the axis of the bridge..

Caution: The direction of movement is not necessarily identical to the axis of the bridge.

 

Materials and Corrosion

The main components of lamellar dilation and materials:

  • Structural profiles and cross members made of steel (S355J2 + N)
  • Sealing Profiles EPDM or CR
  • Bearings and dampers from natural rubber NR
  • Plain bearings made of special synthetic material (PTFE)
  • Steel sliding sheets - austenitic steel 1.4041

For all steel parts exposed to atmospheric conditions used anticorrosive levels C5-M (marine environment) in accordance with EN ISO 12994-5:

Depending on customer request, it is possible to perform the protection of high or medium duration.

  • Blasting SA 2.5 or better
  • 2k Zn enriched epoxy paint, 1x60 um
  • 2k solvent epoxy primer, 2x60 um ili 3x60um
  • 2k polyurethane topcoat 1x60um
  • At the customer's request is possible and different corrosion protection

 

Testing

Independent testing body (Institut IGH, Zagreb and Tzus, Prague) were examined intrinsic properties and the quality of the overall system, as well as expansion joints components (springs and bearings), tests under conditions that correspond to the actual action. The figure below shows the layout of the experiment in which a transitional device checks the ability of movement in all three axes. All the components used to make the transition to modular been verified as to their applicability in testing the mechanical resistance and fatigue.
Polisteel pokusi

 

Details

Openings

The size of the hole determines savings designer already in the planning stage. Measures savings openings in the building must be inspected before installation of the construction site and corrected if necessary.


Cover front side
Front side of the cover sheets. The cover can run normal or double sheets.

Edge surfaces and sidewalk
Contour boundary surface adjusts the cross-section of the bridge and is implemented through the welded pins or through the appropriate cover sheet.

Management

Elastomeric out springs coordinate together with sealing profiles shifts of individual lamellae. This time stretching divided into individual gaps and also be elastically damped transmit braking force and movement.

Loads are thereby transmitted via the control box into the surrounding structure can have the following limits:

  • in the horizontal direction of maximum 10KN per control box
  • in the vertical direction of maximum 18KN per control box
Flexible management system to another that prevents damage to the joints and the blocking of certain gaps, for example, caused by trapping foreign objects (stones, etc.) between the individual lamellae.

 

Schedule fixing

Joining fixtures should be run according to the rules of construction of reinforced concrete. Nodes anchorages on the edge profile is generally distributed at right angles to the modular expansion joints. Accordingly, the mounting structure running parallel to the anchor nodes. Concrete below the box to traverse to incorporate further reinforce the local concentration of the load. In order for the lifetime of devices ensure flawless transfer load for the surrounding construction, POLIROL recommends the following minimum fixings:
  • Longitudinal gantry fixture:
    at least Ø16 mm (a ≤ 250 mm)
  • Vertical gantry fixture:
    at least Ø16 mm (3 or 5 bars aside, the schedule before assembling transitions)
  • Additionally fixture:
    at least Ø12 mm (2 pieces per box below to traverse)

 

Assembly and installations

Modular expansion joints shall be entered in the workshop. It can be in a single building element of up to 20 meters transported to the installation site. Crane is placed in the holes in the building.

You should first check the width of the expansion and setting. Then transitional device height accurately furnished, both edge profiles and structural welds attached so that it can "work" even before the placement of concrete. Sklapanje i ugradnja Polisteel prijelazne naprave

In general, only qualified personnel should install modular expansion joints. Whenever possible, recommended installation of modular expansion joints after applying a superficial layer of pavement. Therefore, the gap or slot filled dilatation first lean concrete, asphalt to be able to be installed without interference. Asphalt and concrete are skinny then removes the width required opening and installed a transitional device. The advantage of retrofitting is primarily in the fact that the joint can accurately adjust the amount of pavement.
This leads to an increase in ride conformity, reducing shock and thus prolongs the life of that expansion joints, and pavement.

On the edge profiles are set custom plates that support the edges of the gap. The opening, which keeps moist, carefully entered high strength concrete (C30/37 or higher). Concrete must not penetrate the box girders!

Use and maintenance

Modular expansion joints in the circumstances of the planned transactions should not maintain the self-cleaning effect. For this reason, the control may be limited to examinations, which take place within the framework of regular routine inspection of bridges.

That damage to timely identify and eliminate, it is recommended to spend two of the transitional devices annually.

All wear parts can be replaced quickly, using simple aids.

Uporaba i održavanje Polisteel prijelaznih naprava

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