Zonas de Césped para Eventos y Festivales
Terreno que aguanta el montaje, el evento y el desmontaje
Los eventos no destruyen los campos. Lo hace la semana de montaje. Las rejillas IBRAN refuerzan el suelo donde se concentra el trabajo pesado, de modo que el terreno soporta el tráfico y se recupera sin problemas una vez terminado el evento.
Por qué el refuerzo es imprescindible aquí
Pregunta a cualquier responsable de un recinto de eventos qué fue lo que arruinó el terreno y la respuesta casi nunca es el público. Son las dos semanas de alrededor: camiones articulados descargando escenarios, manipuladores telescópicos yendo y viniendo, grupos electrógenos, módulos de servicios, todo ello sobre terreno blando y con la meteorología que toque.
El tráfico peatonal también daña, sobre todo en puntos concentrados: accesos, frente a los escenarios, los pasos naturales entre recintos. Pero la gente se dispersa y el césped se recupera. Los vehículos no se dispersan. Siguen la misma ruta hasta el mismo punto, giran en el mismo sitio, y si el suelo está húmedo abren roderas que ya no cierran.
Reforzar ese terreno cambia la economía de todo el evento. Las rutas y los compuestos se mantienen operativos con mal tiempo, así que el montaje no se detiene. El suelo no queda destrozado, por lo que la restauración es más barata o innecesaria. Y el terreno está listo para el siguiente evento en lugar de necesitar un año de descanso.
Aplicaciones principales
- Rutas de vehículos y caminos de servicio en el recinto
- Compuestos de producción y de artistas
- Huellas de escenarios, carpas y estructuras
- Bases para grupos electrógenos, módulos de servicios y cabinas
- Accesos y puntos de estrangulamiento
- Zonas de bares, restauración y alta afluencia peatonal
- Aparcamiento de desbordamiento y accesos a zonas de acampada
- Rutas de vehículos de emergencia y sanitarios
Resumen técnico
| Subbase | 150-250mm de árido drenante de granulometría abierta para rutas de vehículos. Menor espesor donde la carga es peatonal |
| Material de relleno | Tierra vegetal de base arenosa para césped, o mezcla graduada 6-20mm para compuestos y bases de equipos |
| Cargas típicas | Camiones articulados, manipuladores telescópicos, grúas, cabinas, grupos electrógenos, multitudes |
| Aspecto | El relleno de césped mantiene el aspecto de campo entre eventos |
| Disponibilidad | Utilizable con tiempo lluvioso: el montaje y el desmontaje no dependen de la meteorología |
| Permeabilidad | Totalmente permeable al agua. El agua drena en lugar de acumularse frente al escenario |
| Vida útil de diseño | 25 años, con instalación documentada |
| Material | 100% polipropileno reciclado, fabricado en la UE con polímero reciclado |
¿Refuerzo permanente o plataformas temporales?
La mayoría de los recintos de eventos alquilan plataformas temporales, y para un evento puntual en un campo desconocido esa es la respuesta correcta. Para un recinto que acoge eventos año tras año, los números cambian.
Las plataformas temporales son un coste recurrente con mano de obra recurrente: llegan, se colocan, se levantan, se van, y el año siguiente se vuelve a pagar. Además hay que colocarlas antes de que empeore el tiempo, lo que obliga a comprometerse con antelación aunque no sea necesario.
El refuerzo permanente es una sola instalación que simplemente está ahí. El césped crece a través de él, el campo sigue pareciendo un campo, y cada evento posterior utiliza un terreno ya preparado. En las rutas y compuestos que se usan en cada edición, suele ser la opción más económica en pocas temporadas, y elimina una tarea logística de cada montaje.
El enfoque más sensato en la mayoría de los recintos es combinar ambas soluciones: refuerzo permanente en la infraestructura fija que nunca cambia de lugar, y plataformas temporales para lo que varía con cada distribución del evento.
¿Qué profundidad de rejilla elegir?
El número de una rejilla determina la profundidad de la capa confinada. En un recinto de eventos, esa decisión la marca el tráfico de montaje, no el evento en sí.
- IBRAN®-X50 es nuestra recomendación para rutas de vehículos, compuestos y bases de estructuras. El tráfico de montaje es pesado, gira y llega con cualquier condición de terreno.
- IBRAN®-X40 para rutas de menor carga, aparcamiento de desbordamiento y zonas mixtas de peatones y vehículos ligeros.
- IBRAN®-X30 para zonas peatonales, pasarelas y terreno de acampada donde el paquete de firme debe mantenerse poco profundo.
Especifica en función del vehículo más pesado del programa de montaje, no del vehículo medio. En la mayoría de los recintos ese vehículo es un articulado cargado o un manipulador telescópico, y ambos giran.
Elección del material de relleno
Para las zonas que deben mantenerse verdes entre eventos, utiliza una tierra vegetal de base arenosa enrasada con la parte superior de las celdas, con una mezcla de semillas de uso intensivo. El campo tiene aspecto de pradera o parque durante cincuenta semanas al año y soporta el evento durante las otras dos.
Para compuestos, bases de equipos y rutas de servicio permanentes, utiliza una mezcla graduada 6-20mm, gravilla angular y limpia. Una mezcla graduada compacta mejor que un tamaño único porque el árido fino rellena los huecos entre el grueso, y una celda completamente rellena transmite la carga a través de la piedra y no a través del plástico. Proporciona una superficie firme y predecible para cabinas, grupos electrógenos y equipos apilados.
Donde una superficie de piedra no encaje estéticamente, recuerda que puede cubrirse: una ruta con relleno de piedra bajo una fina capa de césped o malla durante el evento te da la capacidad portante estructural y el aspecto que necesitas el día del evento.
How it goes in
- Map the fixed infrastructure first. Every site has routes, gates and compounds that are in the same place every year. Those are what to reinforce; the rest changes with each layout.
- Set out and establish falls. Event fields are often the flattest land available, which means water has nowhere obvious to go. Decide where it goes before you build.
- Strip turf and topsoil to a firm formation, removing soft spots rather than building over them.
- Lay a woven geotextile across the formation, lapping joins by at least 300mm. On agricultural ground this is structural, stopping the sub-base punching down into soft subsoil.
- Lay and compact an open-graded sub-base in 50mm layers, to a depth set by the heaviest vehicle in the build schedule.
- Blind with a thin levelling layer and screed flat.
- Push-fit the grids together, staggering the joints, and cut around gateposts, services and existing drainage.
- Restrain the edges, particularly along routes, where vehicles will otherwise clip the edge and drag the outer grids sideways.
- Fill the cells level with the cell tops and brush in. Seed or turf grass areas and allow a full growing season before the first event where you can.
Full step-by-step detail is in our grass grid installation guide.
Planning the build, not the event
The single most useful exercise is to walk the site with the build schedule rather than the event plan.
Where does the first artic go, and what does it drive over to get there? Where does the telehandler spend the week? Where do the cabins land, and what route did they come in on? Which gate takes every delivery, and where does a lorry turn round when it has unloaded?
Those answers give you a map of the ground that takes real punishment, and it is usually a surprisingly small proportion of the site. Reinforcing it costs a fraction of surfacing broadly and fixes most of the damage, because the damage is concentrated exactly where the heavy plant repeats the same movements.
Add the emergency and medical routes to that map. Those have to work regardless of weather, and unlike the rest of the schedule you do not get to reschedule them.
Crowd areas and pinch points
Foot traffic does not rut ground the way vehicles do, but it destroys grass where it concentrates: entrance gates, the front of a stage, bar frontages, the route between two arenas, and the toilets.
Those areas turn to mud through sheer repetition, and once they do they become both a welfare problem and a reputational one, since mud is what ends up in the photographs.
Reinforcement keeps the ground firm and free-draining under crowd loading, so a wet weekend produces a damp field rather than a quagmire. For sites that market themselves on comfort, that is worth more than the construction cost.
Handing the land back
Many event fields are rented, borrowed or dual-purpose: grazing, sports pitch, parkland, farmland. The obligation to return them in good condition is often the binding constraint on whether an event can happen at all.
A grass-filled grid is invisible once established, so the land continues in its normal use between events. It stays fully permeable, so it does not change drainage on the holding. And because the ground is not churned, reinstatement after each event is minor rather than a major earthworks job.
If you are negotiating a multi-year agreement with a landowner, the ability to say the ground will not be damaged is a considerably stronger position than promising to repair it afterwards.
Get it right first time
The one thing worth knowing: build for the wettest version of your build week.
Every event site is specified against a reasonable weather assumption, and then one year it rains for the entire build. That is the week that decides whether the ground survives, because a heavy vehicle on saturated ground does more damage in one pass than a hundred passes in the dry.
Specify the routes and compounds for the bad year rather than the average one. It costs a little more once, and it removes the scenario where the build stalls, the ground is destroyed, and the reinstatement bill arrives on top of an event that already went badly.
Ask our engineer
Questions about depths, which areas to reinforce, or how this compares to trackway hire? Ask below, or get in touch directly.
Design your surface
Set out the area, choose a grid and an infill, and see the finished surface. The schedule and the specification follow.
Permeable surface specification
Schedule
Assumptions
Specification
Common Questions
What actually damages an event field?
Rarely the crowd. It is the fortnight either side: artics delivering staging, telehandlers running back and forth, generator trucks and welfare units, all on soft ground in whatever weather turns up.
People spread out and grass recovers, but vehicles follow the same route to the same compound and turn at the same point, and on wet ground that is what does the lasting damage.
Is permanent reinforcement better than hiring trackway?
For a one-off in an unfamiliar field, trackway is the right answer. For a site hosting events year after year, permanent reinforcement on the routes and compounds that never move is usually cheaper within a few seasons and removes a logistics job from every build.
Most sites end up doing both: permanent reinforcement on fixed infrastructure, trackway for whatever changes with each layout.
Which areas of a site should be reinforced?
Walk the site with the build schedule rather than the event plan. Where does the first artic go and what does it drive over? Where does the telehandler spend the week? Which gate takes every delivery and where does a lorry turn round?
That map is usually a surprisingly small proportion of the site, and it is where the damage concentrates. Add the emergency and medical routes, because those have to work regardless of weather.
Which grid depth does an event site need?
The 50mm grid for vehicle routes, compounds and structure standings, because build traffic is heavy, it turns, and it arrives whatever the ground conditions. The 40mm for lighter routes, overflow parking and mixed pedestrian and light vehicle areas. The 30mm for pedestrian areas and camping ground where the build-up needs to stay shallow.
Specify against the heaviest vehicle in the build schedule, not the average one.
Will the field still look like a field between events?
With a grass fill, yes. Grass grows up over the cell tops and the reinforcement is invisible once established, so the land continues in its normal use as grazing, sports pitch or parkland.
Mowers pass straight over because the cell tops sit below the growing crown.
Does reinforcement help with crowd areas and mud?
Yes. Foot traffic destroys grass where it concentrates: entrance gates, the front of a stage, bar frontages, routes between arenas and the toilets.
Reinforcement keeps those areas firm and free-draining under crowd loading, so a wet weekend produces a damp field rather than a quagmire. For sites that market themselves on comfort, that is often worth more than the construction cost.
What should event site grids be filled with?
A sand-dominant rootzone with a hard-wearing amenity seed mix for areas that must stay green between events. A 6-20mm angular graded blend for compounds, standings and permanent haul routes, where a firm predictable surface matters more than appearance.
Where a stone route needs to look right on the day, it can be topped with turf or matting for the event.
How long before a new installation can host an event?
For grass areas, allow a full growing season before the first event where the programme permits, because the surface is only as strong as the root structure holding the rootzone together.
Stone-filled compounds and routes are usable as soon as they are laid and filled. Where time is short, use turf rather than seed and phase the areas that establish first.
Does it help when the land is rented or dual-purpose?
Considerably. Many event fields are grazing, sports pitch or farmland, and the obligation to return them in good condition often decides whether an event can happen at all.
Because the ground is not churned, reinstatement after each event is minor rather than a major earthworks job, and being able to tell a landowner the ground will not be damaged is a stronger position than promising to repair it.
Will it work if the build week is wet?
That is the case to specify for. A heavy vehicle on saturated ground does more damage in one pass than a hundred passes in the dry, so build the routes and compounds for the bad year rather than the average one.
A reinforced, fully permeable surface stays usable when the surrounding ground does not, which keeps the build on schedule rather than stalling it.
Ask our engineer
Questions about depths, sub-base, edging or which system fits your project? Ask below.
