Complete Railway Maintenance ｜ Heavy Machines, Rail Cutting, Welding & Track Technology

Have you ever wondered how worn railway tracks disappear overnight, ready for trains again by the following morning? The Colmar Rail Shear RP2000 is presented as a powerful and reliable hydraulic cutting solution, developed specifically for railway maintenance, dismantling, and modernization works. Designed and manufactured by VTN Europe, this heavy-duty attachment is engineered to be mounted on excavators ranging from 21 to 35 tons, making it well-suited for demanding rail demolition environments. The RP2000 stands out for its exceptional durability, as its entire structure is built from hard-ox and heat-treated steel, ensuring high mechanical strength and long service life even under continuous heavy loads. At the heart of the shear is a large hydraulic cylinder capable of delivering up to 139 tons of cutting force, allowing it to effortlessly cut end-of-life railway rails with a mass of 70 kilograms per meter and above. A high-flow speed valve further enhances productivity by reducing cycle times and enabling faster, more efficient operations on site. To increase versatility and reduce maintenance costs, the shear is equipped with four times reversible and interchangeable blades, which extend blade life and minimize downtime. The hydraulic cylinder is fully enclosed and installed in an overturned position, offering excellent protection against impacts and accidental damage during operation. For maximum maneuverability, the RP2000 features an oversized planetary gear-driven 360-degree rotation system, allowing precise positioning and smooth handling in confined or complex working conditions. Specifically designed to cut standard rail profiles such as UIC-60, the Colmar Rail Shear RP2000 is an ideal tool for efficient, safe, and modern railway infrastructure projects. The video records a real working day on a railway vegetation clearance project, where specialized railroad equipment is used to remove dense bushes and maintain a safe railway corridor. The operation begins as a railroad excavator fitted with a professional mulcher attachment replaces its standard digging bucket. A heavy-duty protective curtain surrounding the cutting head prevents debris from being thrown toward the track or nearby workers during operation. The machine then travels slowly and steadily along the railway on its steel rail wheels, allowing precise movement without leaving the tracks. As it advances, the hydraulic boom extends toward the railway embankment and carefully lowers the mulching head onto thick bushes, tall grass, weeds, and small tree branches growing inside the safety center. Once in position, the rotating drum spins at extremely high speed, shredding the vegetation into fine mulch directly on the ground. This process quickly clears the surface while eliminating the need to collect or transport the plant material afterward. Meanwhile, a team of workers wearing reflective safety clothing and protective helmets follows behind the excavator. Using handheld brush cutters, they trim grass and remove small plants from narrow spaces around railway structures and close to the ground where the larger machine cannot reach. Through the efficient combination of mechanized clearing and manual finishing, the entire railway corridor is cleaned thoroughly, ensuring safe train operations and improving long-term track maintenance. The Pendrel SB60 with AutoMaster is a modern and efficient solution for railway track maintenance. The SB60 is a high-performance sleeper changer designed as a carrier-mounted attachment, typically installed on an excavator. It is capable of removing ballast, extracting worn sleepers, and installing new concrete or wooden sleepers using a single attachment. Thanks to its tilt and rotation functions, the SB60 can operate effectively in confined areas such as stations, tunnels, or narrow track sections, allowing sleepers to be replaced from the side or the center of the track. In addition, the AutoMaster is an optional attachment that significantly enhances the machine's functionality. It allows the automatic installation of Pendrel Fast Clips, including FC and FE types, directly onto newly installed sleepers. This process is fully controlled from the operator's cab, reducing the need for on-track workers and improving overall safety. The AutoMaster can install approximately 20 to 30 sleepers per hour and is compatible with both SB40 and SB60 models. The process begins at the rail joint, where a bright silver section marks the exact location to be welded. This area has been previously ground by a worker to remove surface irregularities, oxidation, and contaminants. Grinding ensures that the rail ends are clean and properly aligned, which is essential for achieving a strong and uniform weld. Once preparation is complete, the Fleshbutt welding machine is positioned over the rail joint. The welding fixture clamps firmly onto both rail ends, holding them securely in place. Hydraulic rams mounted on the fixture are aligned with the rails and prepared to control their movement during the heating and welding stages. Electric current is then applied across the small gap between the rail ends. Pulsed alternating current, typically between 600 and 700 amps, flows through the contact surfaces. This electrical resistance generates intense heat at the rail ends. As the current continues, the steel at the ends of the rails rapidly heats up and begins to glow. When the temperature reaches approximately 1,500 to 1,700 degrees Fahrenheit, the steel becomes plastic and suitable for forging. At this moment, the hydraulic rams activate and push the two heated rail ends toward each other. The force applied by the rams causes the softened metal to fuse together, forming a single continuous rail. Excess molten material is squeezed outward from the joint, indicating that proper fusion has occurred. The newly formed weld remains visibly glowing, showing that the steel is still extremely hot. This glowing section confirms that the rails have been successfully fused at the joint. The welded area is allowed to cool gradually, stabilizing the structure of the steel and locking the rails into one solid piece. After the welding operation is complete and the joint has cooled sufficiently, the flash butt welding machine is released from the rail. The clamps are removed and the hydraulic rams retract. The welder is then packed up and moved away from the track, leaving behind a continuous welded rail section ready for further finishing or inspection. The rail cutting process begins with the preparation of the work area to ensure stability and safety. The section of rail to be cut is clearly marked, allowing operators to identify the exact cutting point. The rail is then secured to prevent vibration or movement during the operation, which is critical for achieving a clean and precise cut. The cutting operation is carried out using a H2 series rotary rescue saw equipped with a black diamond cutting blade. Once the saw is activated, the operator gradually brings the rotating blade into contact with the rail surface. Instead of forcing the blade, steady and controlled pressure is applied, allowing the high-speed rotation to do the work efficiently. As the blade penetrates the hardened steel, sparks are generated, indicating effective material removal. The black diamond blade maintains consistent cutting performance even under extreme friction and heat, enabling it to slice through the dense rail profile without losing speed or stability. The operator continues the cut in a smooth, continuous motion, keeping the saw aligned to ensure the blade follows a straight cutting path. During the process, brief pauses may be taken to manage heat buildup and maintain optimal blade performance. This controlled approach helps extend blade life and prevents damage to the cutting equipment. As the blade reaches the base of the rail, cutting speed remains steady to complete the separation cleanly. Once the cut is finished, the two rail sections are fully separated with minimal deformation at the cut edges. The saw is powered down and removed from the work area. The result is a fast, precise, and reliable full rail cut, demonstrating the effectiveness of the H2 series rotary rescue saw combined with the durability of the black diamond blade in heavy-duty railroad applications. On the 22nd of March 2017, a specialist team from Hay Rail arrived to carry out the stressing of the first 1,000 meters of continuously welded rail on the Gloucestershire-Warwickshire steam railway extension to Broadway. This operation is essential to ensure the track can safely withstand temperature changes and long-term loading. Two anchor points are established, each consisting of five fully clipped-up rail panels positioned 500 meters on either side of a central pulling point. The size of the gap to be closed at the center is carefully calculated using several variables, including the total rail length, the rail section size, and the current temperature of the steel. To allow controlled movement during stressing, the rail is placed on small rollers at intervals of every eight sleepers. Hydraulic rams are then used to pull the rails together with precise force, gradually closing the calculated gap. Once the correct stress level is achieved, the rail ends are welded together to form a continuous length. Finally, the entire section of track is fully clipped up, locking the rail securely in place and completing the reinforcement process. The dynamic track stabilizer improves railway track stability by compacting the ballast beneath the sleepers through controlled horizontal and vertical vibrations. Hydraulic cylinders apply vertical pressure while vibrating units generate lateral movement, eliminating voids and increasing ballast density. This creates stronger contact between the sleepers and ballast, ensuring more even load distribution from passing trains. As a result, track settlement is minimized, durability is enhanced, and maintenance intervals are extended. The DGS is typically used after tamping, ballast cleaning, or new track installation, allowing the railway line to reopen safely with minimal delay. The video presents a specialized railway maintenance train, most likely the Plasser & Theurer RU800S, one of the world's most advanced track renewal machines. Designed to perform complete railway rehabilitation in a single continuous operation, this engineering train combines multiple working units into one integrated system. Measuring up to 177 meters in length, it resembles a moving factory rather than a conventional rail vehicle. When fully loaded with replacement sleepers and fresh ballast, its operating weight reaches approximately 650 tons. The machine is primarily used to replace worn rails, deteriorated sleepers, and contaminated ballast quickly and efficiently while minimizing disruption to railway traffic. As it advances along the track, old rails and sleepers are removed, the fouled ballast is excavated, and new ballast is distributed before new sleepers and rails are installed in their exact positions. Conveyor belts, lifting mechanisms, ballast handling equipment, and tamping systems operate in perfect coordination throughout the process. By completing several maintenance operations simultaneously, the train greatly reduces manual labor, shortens track possession times, and improves construction quality. Its advanced automation ensures precise alignment and consistent results, making it an indispensable solution for modern railway infrastructure renewal projects where speed, efficiency, and safety are essential. The construction progress of the Saneri base tunnel entered an important new phase in 2017 as large sections of the previous infrastructure began to be dismantled. Demolition and removal work started on the massive conveyor belt systems in the former gravel processing plant. These enormous installations, once essential for excavation, were carefully taken apart piece by piece. The landscape around the tunnel portals has already begun to recover, and the material storage mound, which once reached over 150 meters in height, has been completely reshaped and replanted. Gradually, the area is returning to its natural surroundings, demonstrating how construction sites can be successfully reintegrated into the environment. At the Camerino installation site, work focused on preparing the Logistical Center for Railway Technology. This location became the operational heart of the project, where all technical components for the tunnel systems would be assembled and organized. Large installation halls required solid foundations, which were carefully constructed to support the heavy equipment and materials. On a newly prepared ballast bed, track workers began laying the first temporary rails leading toward the valley, marking the beginning of railway infrastructure installation inside the tunnel. The project attracted significant public interest. In May, more than two 500 visitors attended an open construction day. The main attraction was a special trip through the unfinished tunnel, which, at that time, still had no tracks installed. The guided tours and explanations impressed many guests, giving them a unique insight into the complexity of such a large infrastructure project. Children were even allowed to sit inside real construction machines, turning the visit into an unforgettable experience. After exploring the site, visitors enjoyed refreshments provided by the organizers. By summer, major surface construction activities at the installation site were completed, and the tunnel was officially ready for the installation of the permanent track system. In railway technology, nothing is left to chance. Contractors were required to demonstrate their methods on a 50-meter test section to prove that all standards and requirements could be fully met. A new and innovative installation technique was introduced, and engineers closely monitored every detail. Measurements were taken, reports were prepared, and the results were positive. With the test successfully completed, the official start of railway technology installation took place on July 27. Media representatives were invited to view the first completed sections and to learn about upcoming stages of the project. The beginning of this final major phase generated great enthusiasm among all participants. A new workers' canteen was also opened, providing up to 200 meals per day and ensuring that the construction teams remained well-fed and motivated for the demanding tasks ahead. Inside the tunnel, the actual track installation advanced steadily. Railway wagons transported 120-meter-long rail sections directly to the work zones. The process was highly efficient. Rail elements were unloaded in pairs and carefully placed along the concrete base. According to the schedule, two 360-meters of track were planned for installation during this phase. In total, 98,000 sleeper blocks needed to be positioned with absolute precision. A portal crane carried the sleepers to a special laying machine, which set them on the tunnel floor at exact intervals of 60 centimeters. Specialized technicians then lifted the rails and positioned them on the sleepers using hydraulic equipment. The alignment had to be perfect, accurate to the millimeter. Once everything was correctly adjusted, the system was ready for concreting. High-quality concrete was produced at the installation site, carefully mixed, tested, and transported into the tunnel by shuttle vehicles. The sleepers were embedded in a 30-centimeter-thick concrete layer, which was compacted and finished by hand. Each day, around 700 tons of concrete were used to create approximately 240 meters of permanent track, bringing the Saniri Base Tunnel steadily closer to completion. The LD4-1P is a portable rail drilling machine developed by Sember and specifically designed for professional railway applications. This internal combustion drilling unit is engineered to deliver consistent and precise holes directly on installed rails, even under harsh outdoor and weather conditions. Thanks to its compact design and reliable performance, the LD4-1P is widely used in track maintenance, signaling installation, and railway electrification projects. The machine is powered by a four-stroke gasoline engine with a displacement of 35.8 cc, typically supplied by Honda. It produces approximately 1 kilowatt of power, or 1.3 horsepower, at 7,000 revolutions per minute. This output ensures stable drilling performance while maintaining efficient fuel consumption. The LD4-1P supports a wide drilling range using broach cutters from 13 to 40 millimeters in diameter on rails up to 50 millimeters thick. When equipped with special spiral drill bits, it can drill diameters from 7 to 27.5 millimeters on rails up to 45 millimeters thick. One of the key features of the LD4-1P is its DBGF2 clamping system. This moving arm device securely fixes the machine to the rail web or flange, guaranteeing accurate alignment and safe operation. The built-in coolant system, consisting of a reservoir and pump connected by a quick coupler, provides continuous lubrication and cooling during drilling. Designed for one-man operation, the LD4-1P uses a manual pull rope start and an automatic centrifugal clutch. With a total weight of around 19.5 kilograms, the machine remains easy to transport while being compatible with rail profiles ranging from 43 to 75 kilograms per meter. The ballast tamper is designed to restore track stability by compacting crushed stone beneath each sleeper through a First, hydraulic arms lower the tamping unit into the ballast between two adjacent sleepers. The tamping tines penetrate deeply into the stone layer and position themselves beneath the sleeper. Next, the machine activates a high-frequency vibration system, causing the ballast particles to shift and settle into empty spaces under the sleeper. At the same time, the tamping tines move toward each other in a squeezing motion, tightly compressing the ballast to create a dense and stable foundation. Once the compaction process is complete, the tamping head is lifted clear of the track. The excavator then moves backward by one sleeper spacing, allowing the machine to repeat the same sequence until the entire section of railway has been uniformly compacted and stabilized. Railway infrastructure often requires ground improvement before higher traffic loads can be introduced. In Bad Bentheim, Keller Grunbow carried out vibro-compaction along more than three kilometers of railway line to prepare it for both freight and regional passenger services under the Regiopa project. Because the work took place beside an existing railway, the available construction space was extremely limited. Using its patented deep vibro-compaction technology, Keller completed the project quickly and efficiently. Within only 40 working days, nearly two 500 compaction points were installed using about 1,900 tons of backfill material. The upgraded foundation significantly increased track stability and load-bearing capacity, enabling safe passenger operations. Since December 2018, the modernized railway has been capable of transporting approximately 1, 700 passengers every day, improving regional mobility and transportation efficiency. The aluminothermic rail welding procedure begins with careful preparation of the work area. Before any welding operation is started, the damaged or separated rail ends are inspected to ensure that they are suitable for repair. Any loose ballast, dirt, grease, rust, paint, or other contaminants surrounding the welding location are removed to provide a clean and stable working environment. The rail fastenings near the joint are loosened or removed if necessary, allowing the rails to be adjusted without unnecessary restraint. The operators verify that all required tools, molds, crucibles, welding materials, and safety equipment are available before proceeding. The next step is to prepare the rail ends. The damaged sections of the rails are cut away using an appropriate rail cutting machine to produce clean and square surfaces. The rail ends are then ground to eliminate any irregularities that may interfere with proper alignment. The freshly prepared surfaces are carefully inspected to ensure that no cracks, burrs, or Accurate preparation at this stage is essential because the quality of the final weld depends heavily on the condition of the rail ends. After the rail ends have been prepared, the rails are aligned precisely. Hydraulic or mechanical rail alignment devices are installed to adjust the horizontal and vertical positions of the rails. The operators carefully check the rail head, web, and foot to confirm that both rails form a continuous profile. Small adjustments are made until the rails are perfectly aligned. A controlled gap is then established between the two rail ends using spacing gauges. Maintaining the correct gap ensures that there is sufficient space for the molten steel to flow completely around the joint during the welding process. Once the alignment has been completed, the refractory mold is assembled around the joint. The mold consists of two matching halves that are specifically designed for the rail profile being welded. The mold halves are carefully positioned around the rail and secured tightly using clamps or a mold frame. The operators check that the mold fits firmly without any movement. Any openings between the mold and the rail are sealed with refractory sealing paste or molding sand. This sealing process prevents molten metal from leaking during the pouring stage and helps maintain the correct shape of the finished weld. With the mold securely installed, the pouring system is assembled. A crucible is positioned directly above the mold. The crucible is designed to contain the aluminothermic mixture and direct the molten steel into the mold once the chemical reaction has been completed. Disposable tapping components, slag retainers, and other accessories are installed according to the welding system being used. The operators verify that every component is securely positioned before heating begins. The rail ends and the interior of the mold are then preheated. A gas burner is placed beneath the mold to raise the temperature of the rail ends gradually. The flame is carefully adjusted to produce uniform heating over the entire joint area. During this stage, moisture is completely removed from the mold while the rail ends are heated to the required temperature. Uniform preheating reduces thermal shock, improves the flow of molten steel, and promotes proper fusion between the weld metal and the parent rails. The preheating process continues for the specified period until the required temperature has been reached. After preheating has been completed, the burner is removed carefully. The operators inspect the mold cavity to ensure that it remains clean and dry. Any loose particles or debris are removed before pouring begins. The crucible is then charged with a measured quantity of aluminothermic welding material. The thermite mixture has been prepared in advance and contains the components required to generate molten steel through an exothermic chemical reaction. An ignition source is placed at the top of the mixture to initiate the reaction. The thermite reaction is started by igniting the powder at the top of the crucible. Within a short period, the chemical reaction develops rapidly and generates an extremely high temperature. As the reaction progresses, molten steel forms at the bottom of the crucible while lighter slag accumulates above it. The crucible is specifically designed so that the molten steel remains separated from the slag until the appropriate moment. The operators observe the reaction from a safe distance while allowing it to proceed without interruption. When the reaction has been completed, the tapping mechanism opens automatically or is released according to the design of the crucible. The molten steel flows downward through the pouring system and enters the mold cavity surrounding the rail gap. The liquid steel fills the entire space between the rail ends while also occupying the cavities that reproduce the original rail profile. The slag remains inside the crucible or is retained by the slag control system, preventing contamination of the weld metal. The mold remains completely filled until solidification begins. After pouring has been completed, the molten steel is allowed to cool naturally inside the mold. During this period, the weld metal solidifies while bonding metallurgically with both rail ends. The operators avoid disturbing the joint while the cooling process is taking place because movement could affect the integrity of the weld. The cooling time depends on the rail size, ambient conditions, and the specifications of the welding system. Sufficient cooling is necessary before any further operations are performed. When the weld has cooled adequately, the mold clamps are released and the refractory mold is carefully removed from the rail. The solidified excess metal, commonly referred to as the riser, remains attached to the top of the weld. This excess material is removed using a hydraulic shear or another suitable cutting device while the weld is still relatively hot. Removing the excess metal at the appropriate temperature reduces the effort required during subsequent grinding operations. Following the removal of the riser, the weld is ground to restore the original rail profile. Specialized rail grinding equipment is used to shape the rail head until it matches the surrounding rail surfaces. Grinding is carried out gradually, removing only the excess material while preserving the required dimensions of the rail. Particular attention is given to the running surface because any irregularity may affect wheel contact and riding quality. The grinding process continues until a smooth transition is achieved across the welded joint. Once grinding has been completed, the weld undergoes a thorough visual inspection. The operators examine the rail head, web, and foot for any visible defects such as cracks, incomplete filling, porosity, or surface irregularities. The overall profile of the rail is checked using straight edges, gauges, or measuring devices to verify that alignment has been maintained throughout the welding operation. Any remaining sharp edges or surface imperfections are removed before further testing is performed. If required by the maintenance specification, non-destructive testing is carried out after the visual inspection. Ultrasonic testing or other approved inspection methods are used to detect internal discontinuities that cannot be observed externally. The inspection confirms that the weld has achieved complete fusion and that no internal defects are present which could reduce the structural integrity of the rail. Any weld that fails to satisfy the acceptance criteria is removed and replaced following the same welding procedure. After the weld has successfully passed all inspections, the rail fastenings are reinstalled and tightened according to the specified requirements. The rail is secured firmly to the sleepers, ensuring that the track geometry remains correct. The surrounding ballast is restored if it was disturbed during the preparation stage. The work area is then cleaned thoroughly and all equipment, molds, crucibles, and unused materials are removed from the site. Finally, a last verification is performed to confirm that the welded joint is fully completed and ready for service. The finished rail profile is checked once more to ensure a smooth wheel passage across the joint. The operators verify that all tools have been removed from the track and that the working area is safe. Once every inspection and finishing operation has been completed successfully, the welded rail is released for normal railway operation.