Hiscs - LMK PT System

Bridge Maintenance - Urgent Elastomeric Expansion Joint Replacement

Our team completed the emergency replacement of a critically deteriorated elastomeric expansion joint mat, on a heavily trafficked bridge, serving as the primary access corridor to a major industrial and logistics hub with continuous heavy truck circulation.

The existing joint had reached an advanced state of deterioration, posing significant risks to the structural integrity and operational reliability of the bridge. Immediate intervention was essential to prevent water infiltration, progressive deck deterioration, increased dynamic loading impacts, and potential disruptions to a critical transportation route supporting regional industrial activity.

Despite highly demanding traffic conditions and continuous operational constraints, the project was executed safely, efficiently, and within an accelerated timeframe, ensuring uninterrupted traffic flow and minimizing disruption to commercial transport operations and the traveling public.

We continue to deliver reliable, high-quality bridge maintenance solutions that prioritize safety, durability, and operational continuity.

Soil & Rock Anchors

HiSCS has been awarded the stressing, testing & grouting works of soil anchors in the project named “PROJECT VORIA”.
It concerns the construction of a complex building for a multi-dynamic mixed-use. These 52 acres complex will include a state-of-the-art casino, a 150-room 5-star hotel, a 1400-seat conference amphitheatre, many dining and entertainment facilities and 836-space parking lot.

HiSCS has undertaken part of the preliminary geotechnical works related with the installation, stressing and grouting of soil anchors.

Soil and rock anchors are geotechnical elements, typically formed by strand tendons grouted into drilled holes. These anchors are used to transfer tensile loads to solid ground, thus preventing movements in slopes, retaining walls and foundations by providing resistance against uplift forces, lateral pressures, or landslides. They are essential for stabilizing excavations without internal bracing. They consist of a bonded section (grouted and bonded to soil), a free stressing length, and the basic stressing elements which are the anchor head with barrels and wedges, where tension is applied to the strands using jacks after grout curing to lock them in place.

The design specifies more than 700 temporary anchors with 3 and 4 seven-wire strands, having nominal diameter of 15.2mm. The anchors are distributed every 2-2.4m, at three different elevations along 247 concrete piles of 0.8m diameter. The piles are drilled using a crawler-mounted rig at a total depth of about 25m.
The soil anchors are inserted manually through the hole having 12m bonded section. The bonded section of the anchor consists of bare strands connected at intervals of about 1m using plastic spacers in the intermediates, so as to develop the needed bonding with the grout. The free part of the anchor (strands covered with a plastic tube which ensures the separation of the strands from the grout), allows the anchor’s elongation, thus application of tensile forces during the stressing process. The installation is completed with the placement against the pile of the anchor plate with barrels and wedges.

HiSCS has been appointed to execute the stressing and grouting works including the needed suitability, acceptance, and pullout tests as well as the placement of load cells in specific locations to monitor the behaviour of the anchors (stressing forces over time). Mono-strand hydraulic jacks connected in parallel with a hydraulic pump have been used to develop the required by the design stressing force (330-380KN/anchor).

LMK Post Tensioning System

Have you ever considered how contemporary bridges maintain their strength, elegance, and resilience under substantial loads and environmental pressures? The answer lies in post-tensioning— a sophisticated construction technique wherein steel tendons are tensioned after the concrete has been cast. This method offers several key advantages:
• Enhanced load-bearing capacity
• Minimized cracking and structural deflection
• Facilitation of longer spans with reduced material usage

From elegant cable-stayed designs to massive highway overpasses, post-tensioning helps engineers push the boundaries of what's possible.

LMK Post Tensioning system responds proactively to the trends of Int'l markets having successfully accomplished numerous projects involving all types of construction methods, from simply supported beams to slabs, cantilevers, incremental launching and segmental structures, demonstrating solid experience in the PT technology.

LMK Post Tensioning system has successfully passed many efficiency tests proving the quality and adequacy in line with Int'l specifications & standards such as EN - EAD - ETAG, AASHTO LRFD, F.I.B. (Federation Int'l du Beton) & PTI (Post Tensioning Institute), demonstrating the following advantages:
• Wide selection of compact anchorages with improved load distribution surfaces.
• Easy coupling with standard or enlarged steel or plastic sheaths (flat and round).
• Frontal grouting/connection arrangement.
• Light weight configuration, facilitating the handling and installation.
• Recesses of smaller dimensions.
• Lower losses and smaller tendons deviations contributing to the economy of the design & construction.

HiSCS can provide full engineering services and support, including preliminary and final designs, supply of materials, equipment/machinery, installation, training, supervision, stressing, grouting, planning and management services and customized solutions for all types of structures.

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