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VSL’s movement joints for structures and roads

Long lasting seals

VSL supplies various types of expansion joints for the construction industry, including bridges, buildings, and engineering structures, to accommodate concrete creep and shrinkage, as well as thermal or seismic movements. Expansion joints absorb horizontal, vertical and oblique movements, always remaining tight giving a comfortable surface continuity for the road traffic.

VSL offer

All structural expansion joints are subject to strict performance testing and quality control. VSL services include design, testing , supply and installation.

Advantages of VSL’s Offer

The structural expansion joints are subject to strict performance testing when requested and 100% quality control. VSL services include design, testing , supply and installation.

Contributing to sustainable solutions

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VSL is constantly developing its products in terms of materials, manufacturing processes and pallications in order to provide effective and sustainable solutions.

ELASTOMERIC EXPANSION JOINTS

Elastomeric expansion joints have been designed to work as a single element, to be absolutely tight and long-lasting. These joints allow horizontal, vertical and oblique movements, remaining tight.

Elastomeric expansion joints

The elastomeric material properties are such that the expansion joints are not affected by low temperatures. Capability of impact absorption is kept during winter. The characteristics of this material also allows resistance to wearing and abrasion and resistance against bad weather conditions, chemical products and fire. Typical movement ranges from 40mm up to 330mm.

TX type joints

The manufacture of these joints, with a highly resistant flexible membrane made of two sheets of reinforcing textile vulcanised with the side blocks, prevents heavy stress to be transmitted to the anchor bolts, abutments or the decks of the bridges, even with skew decks. The membrane keeps its convex shape during the whole expansion cycle, being a self-cleaning joint. Its exclusive lap makes it a tight joint.

T type joints

Joints type T have a central steel framework that allows the straining areas to be distributed so that its upper face resents as few openings as possible, consequently improving traffic conditions and reducing its noise. These joints have been designed so that there appear no strains on the pavement surface, due to joint movement, thus permitting relative displacements between deck and abutment in transversal and longitudinal direction of the joint, the latter being a main characteristic for skew bridges. The joints are fixed to the structure by means of chemical anchorages and nuts tightened with dynamometric wrenches, so that horizontal stresses are transmitted through friction between elastomer and concrete. When large opening and closing movements are required, using double upper framework joints with four areas of controlled straining allows maintaining water-tightness and quality on the rolling surface, thus improving user comfort. The grooves on the upper face of joints type T and TX provides a nonslip surface that makes water drainage easy and acts as a safety element. A steel reinforcement is vulcanised inside the modules, providing them with the appropriate stiffness and prevents them from bending.

TU-TXU type joints

Guided expansion joints have been designed to allow large transverse movements on the bridge in case of earthquake. With this joint, the energy of the earthquake can be dissipated. Guided expansions joints are based in our standard models with one row of anchors fixed to the transverse guides in such a way that it can work as a standard expansion joint in normal conditions and allows large transversal movements under earthquake. PTFE is used to obtain low friction on the transversal movement in order to minimize loads transferred to the deck of the bridge. This solution is more simple and cheaper than those based on metallic expansion joints. Installation and economy takes benefit of this joint in all projects where earthquake loads are involved.

Detail of hole for anchors

KINEMATICS / MAIN COMPONENTS

Elastomeric material

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Elastomeric expansion joints

Elastomeric expansion joints have been designed to work as a single element, to be absolutely tight and long-lasting. These joints allow horizontal, vertical and oblique movements, remaining tight.

The elastomeric material properties are such that the bearings are not affected by low temperatures. Capability of impact absorption is kept during winter. The characteristics of this material also allows resistance to wearing and abrasion and resistance against bad weather conditions, chemical products and fire. Typical movement ranges from 40mm up to 330mm.

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