Construction of waste ramps. Surface sealing. Construction of gas collection stations. Construction of wells
The construction and renewal of waste ramps is a double challenge - both the surface and the inside of the ramp body must be considered. Especially when it comes to extreme depths, the RTi Rohrtechnik international group has over 30 years of experience back. Our range of services includes the installation of stacks and reservoirs for leaching, surface sealing and the installation of gas collection stations in waste dumps.
The best way to prevent leaching and gas emissions is to effectively seal the ramp body. RTi offers this important service in all standard technology variants, in multilayer and top quality configurations. Both mineral sealing systems and plastic membrane sealing are used.
Construction of gas collection stations
With the help of a complex system composed of the gas collection well and the gas collecting pipes that reach the gas collecting stations, almost all the gas emitted from the waste ramp can be captured and transported to the cogeneration stations of the thermal and electric energy. Here, the collected gas can be used energetically in an ecological way. The construction and renewal of the infrastructure components of the waste ramps to the combustion technology interface for many years has been one of the nationally recognized RTi bases. Our offer includes the construction of gas collecting wells, the installation of gas collecting and transport pipelines, the complete construction and equipment of the gas collection stations as well as the gas measuring and regulation technology.
Construction of wells
One of our special competences is the creation of vertical foundation holes in waste landfills; these having a depth of up to 40 m and a diameter of up to 10 m. These massive structures are built step by step concrete-shrunk concrete with steel reinforcement, becoming the key technology in the leaching infrastructure rehabilitation works. They represent the basis for the renewal without open digging of damaged or leaked pipelines in which the pipe breakage method is used, or in the case of installation of polyethylene leachate or reinforced concrete coated with a protective layer.
Due to corrosion, clogging or simply aging, the pipes degrade. Necks and cracks are a danger to the environment, which can mean the loss of important raw materials such as drinking water, gas or oil. Replacement of pipelines through open digging is a costly and long process, produces a lot of noise and often causes significant traffic disturbance. Rohrtechnik RTi Romania rehabilitation technologies without digging offers a contemporary and modern solution! Over the years - both in public and private rehabilitation projects - we have applied these technologies successfully, quickly, efficiently and ecologically.
THE BENEFITS OF REHABILITATION WITHOUT OPEN SAFETY ("NO-DIG"):
Conservation of sub- and over-ground infrastructure
Minimize traffic disturbance
Reduce noise and particle pollution for occupants
Active protection of the environment by reducing CO2 emissions
Short execution times
High economic efficiency
Reinstalling a pipeline that will be operational for the next decades
The RTi Rohrtechnik Group offers a very comprehensive service portfolio that includes "no-dig" methods for repair, renovation and renewal.
Shading of gravity pipelines
Shaving rehabilitation is a method successfully applied by Rohrtechnik International for more than 20 years. The materials and equipment required for this process have experienced a permanent development to meet market demands. This rehabilitation method is based on resin-impregnated flexible walling materials that are inserted into the pipes to be rehabilitated and are subsequently polymerized. Flexible hose allows work to be done on installation lengths of 200 m and more in one step. Even rehabilitation of pipe elbows is possible through this method by shaving.
Epoxy resin casting material
The PE / PP layer
Impregnation with epoxy resin on site
DN 50-1400 mm
Glass-lined construction with foil applied to the exterior and interior
Polyester resin (ISO-NPG) or vinyl ester resin
Impregnation on site
DN 150-1600 mm
PE / PP layer or with external or internal integrated linen
Polyester resin (ISO-NPG) / vinyl ester resin
Impregnation on site
Inversion by steam or water polymerisation
Pull-In and inversion methods can be combined
DN 150-1600 mm
The r.tec® Close Fit process was one of the first renovation processes applied by the Rohrtechnik International Group, using this process for over 25 years.
In close collaboration with major plastic pipe makers, RTi has continuously improved this system to provide the highest quality technology for rehabilitation of drinking water, gas, industrial and sewer pipes. This pipeline rehabilitation technology is based on the use of a high-density polyethylene (HDPE) tube, deformed from the factory.
The deformation process reduces the diameter of the tube by approximately 25-30%. Thus, the tube can be introduced into the host pipe by means of a winch and with minimal effort. By acting with pressure and temperature (hot steam) on the deformed tube, the process of returning to the initial form is initiated. The polyethylene tube is thus molded into the inner wall of the host pipe, making this "close-fit".
This method allows the installation of several hundred meters long sections in a single working day. The scope of this technology is for pipes with diameters between DN150 and 400 mm.
Rehabilitation using continuous pipelines
This system is based on the use of flexible tubes that are delivered in the package or individually. The individual tubes are merged to the spot welding head to head. After cleaning, calibrating and inspecting the host pipe, the new joint tube is drawn into the host pipe by means of a winch.
HDPE tubes are usually used. The scope of this technology is for pipes with diameters between DN 100 and 1,400 mm. For larger diameters, discrete pipe rehabilitation is more cost-effective. Can be used at elbows and angles up to 15 °. The length of the insert depends on its diameter and can be 500 m or more.
Rehabilitation using discrete tubes.
In the case of shrinkage using discrete piping, factory-made tube modules are used, which can be incorporated, pushed or pulled in line into the pipe to be rehabilitated. Depending on the pipe material, this technology can be used for both pressurized and gravity pipelines for drinking water, waste water and industrial pipelines. Typically, GRP tubes, polymerized concrete, polyethylene or similar materials are used. The process can be applied both to circular profiles and to special or profile profiles with diameters between DN 150 and DN 3,000 mm. The resulting annular gap between the host pipe and the new pipe is usually filled with cement based mortar.
Rehabilitation through assembly
Rehabilitation through assembly finds its applicability in the rehabilitation of the accessible pipelines and constructions. in this case, panel segments made in the material factory such as polymerized concrete, GRP, stone or polyethylene are used and are mounted on the inner wall of the building element requiring rehabilitation. Here we have to consider the distinction between partial and full camouflage.
Rehabilitation using spiral pipelines.
This method utilizes tape profiles made in the PVC or HDPE plant that are spiraled by means of a special machine into a continuous pipe. There are 4 types of technology available and, depending on the process, spiral machines can be stationarily installed in the home or can be moved inside the duct.
Spiral rehabilitation can be used for circular or special round type profiles with diameters up to 5,500 mm and is the only rehabilitation method that is 100% free of open cut for any type of diameter. The new spiral pipe is conceived as an independent structure and installed either as a "close-fit" system or by ringing the annular space.
SPR ™ is the spiral rehabilitation process used for circular and special profiles with diameters between DN 800 - 5,500 mm. SPR ™ uses reinforced PVC profiles with reinforced steel. After installation, the annular space is filled with self-supporting cement mortar.
SPR ™ PE
SPR ™ PE spiral system allows the rehabilitation of all circular pipes with diameters between 900 and 3000 mm. The fully integrated steel reinforcement gives the spiral pipe a high rigidity, optimal for exposure to special structural stresses. The annular space is filled with insulating material to stabilize the position.
SPR ™ EX UND SPR ™ RO
SPR ™ EX and SPR ™ RO are "close fit" spiral piping systems, characterized by the transfer of static properties to the PVC profile bars. After rehabilitation, the spiral pipe is closely connected to the inner wall of the host pipe. The SPR EX method is applied to pipes with DN 150-750 mm and SPR RO for pipes with diameters between DN 800 and 1,800 mm.
Cleaning of pipes
Piping cleaning and calibration is an important step for successful rehabilitation. During the cleaning process the deposits, inlays and corrosion inside the pipes are removed.
Depending on the rehabilitation requirements, several procedures are available, including Pipe Inspection Gauge (PIG), washing and high pressure cleaning. For waste water pipeline systems, we offer cleaning of leachate pipelines and drainage system.
Methods used for pipe cleaning:
PIG PIG TEST CLEANING (PIGGING METHOD)
This method allows cleaning of pressure pipes with a diameter of more than 50 mm. The PIGs are inserted into the pipeline by means of a launching device, cleaning the pipeline for several kilometers, without the need for open cuts or disconnecting the pipeline.
LIGHT PRESSURE BREATHING
High pressure washes are used to clean the channels and remove unconsolidated deposits. With a high-pressure pump, the water is introduced into the pipe through a hose with adjustable nozzles, reaching a flow rate of up to 300 l / min and a maximum pressure of 240 bar.
CLEANING WITH VERY LIGHT PRESSURE
The high-pressure cleaning machine provides glossy, degreased and corrosion-free metal surfaces, thus preparing the rehabilitation pipe with shirting material. This is possible thanks to the use of a modern cleaning machine that generates a pressure of up to 1550 bar.
CLEANING CLEAN PRESSURE TO WASTE RAMPAGES
Drainage pipelines in the waste ramps are subjected to very high pressures and loads. In addition, they are prone to incrustation, resulting in even drainage by draining the drains. An inevitable build-up of water endangers the safety of the stability of any landfill.