FI90490B - Planting box for street trees - Google Patents

Description

1 90490

Street tree planting box

The invention relates to a planting box, more particularly to a prefabricated planting box for the protection of the root system of old and new street trees and for the support of a land grid. The visual and amenity-enhancing effect of trees on the urban street scene is quite significant and has been known for a long time. In the era of horse-drawn vehicles, 10 street trees flourished and are doing well because they had room to grow, fertilizer was available nearby, and the air was clean. In today's world, when congested car traffic has made streets narrower, green spaces smaller and air pollution a serious problem, more attention needs to be paid to preserving the viability of trees. Quite often, in downtown areas, all traffic areas have to be paved with asphalt, natural stones or, increasingly, concrete stone pavements for maintenance reasons. The intermediate strips reserved for wooden rows are also coated, as they are often used for py-20 bagging. The space left on the tree is usually only about 2-3 m2. When maintenance is performed mechanically, tree trunks and roots are at risk. Frames are most commonly protected by frame protectors made of steel or concrete. Due to water and air supply, the root system must not be covered with an overly dense covering layer. The root system is most commonly protected with a steel-made ground grid, which is installed about 10 cm above the substrate. The ground grid must be supported so that it does not sink, even if the maintenance machine is running on it.

.-: - .30 Various planting boxes have been used to support the farm, the inside of which is filled with soil. Planting boxes are made ... wood, concrete rings, concrete on site casting or as a final development as a steel frame / mesh structure.

: 35 The wooden box could not withstand the traffic load on it, the lateral forces caused by the compaction of the structural layers of the street, and it was not long enough due to decay anyway. Concrete boxes are in place, pouring 2,90490 expensive to build and too dense for root growth. The same problem also exists with concrete rings and, in addition, the circular shape is less used in land gratings, as it complicates rock placement. The steel frame / mesh structure is an improvement on the previous 5 parts. However, it still has the same drawback as the wooden box, as the net does not provide sufficient side support when compacting the street structure, but gives up and the tightness values required by the standards are not achieved. As the strength of the net gradually deteriorates due to corrosion, it 10 breaks and depression occurs in the street structure. The steel frame in moist and possibly road salt-saturated soils is also not very long-lasting when compared to concrete, for example.

The object of the present invention is to provide a planting box which has the good properties listed above and in which the disadvantages have been eliminated.

In the planting box made of concrete or lightened be-20 ton (hereinafter referred to as concrete) which is the subject of the invention, an attempt has been made to eliminate the above-mentioned disadvantages. The planting box according to the invention is mainly characterized in that the elements of the planting box are beam-shaped and are intended to be stacked on top of each other in a box-shaped frame of the desired height. voided.

30

A preferred embodiment of the invention will now be described with reference to the accompanying figures, in which Figure 1 shows an assembled planting box in perspective, Figure 2a shows the top beam-35 layer beam of the box of Figure 1, Figure 2b shows the second side top beam layer beam, Figure 2c shows the opening beam shows a beam of the lowest beam layer having a sloping upper surface of a planting box according to the second embodiment, Fig. 2e shows a beam of the lowest beam layer of a planting box according to another embodiment, and Figs. 3a-3e show cross-sections of Figs. 2a-2e.

The box consists of concrete beams 1, 2 and 3 stacked on top of each other, like a log structure, which are locked together by latches in the corners 10. The weight of the elements and the dovetail shape 4 of the corner latches hold the beams firmly in place. To prevent lateral displacement of the beams, their opposing surfaces have matching tongues and Pont grooves 5. The retention of the elements can still be ensured by steel mirrors or pipes hitting the ground through holes 6 in the corners.

The beams coming to the top floor are closed-structure, while the beams coming to the root part of the trees are apertured 20 7. The apertures are slightly tapered in the direction of the box. In this case, the gravel on the side of the street structure is made to compact by wedging, and it does not flow inside the box. The openings also allow the tips of the root system to spread outside the box, allowing them to get the extra moisture they need from there. Au-25 bags also reduce the weight of the elements, making them easier to install without a crane. The planting box and the street structure can be completely completed, as compaction does not require simultaneous soil filling of the box.

-30 The box can be easily built to a suitable height, taking into account the soil, former lines, etc. structures and local conditions, and it is not necessary to lower it, for example, on site. The heights of the different sides of the box can also vary as needed. The box is usually installed directly and in the coated areas at a level corresponding to the inclination of the surface. If the surface slope is considerable, a higher set of fitting beams 8 and 9 is used as the upper element at one end.

* 90490

The box can also be easily assembled around an old, already planted tree to the depth allowed by the root system. This is not possible with the above steel frame / mesh box. In areas where the ground has to be filled, the trees 5 can be protected by assembling a frame around the tree to the height of the planned lifting even before the filling work.

The most common box shape is a square, the dimensioning of which is based on the dimensions of the grating. If it is desired to build a rectangular box, longer beams are used with the second side pair. The top beam on these sides has a notch for the necessary support at the joints of the land holding, to which beam No. 1 fits.

15 The elements are easy to store, even outdoors, as they do not rust. Because the elements are short and in the shape of straight beams, they do not take up much storage space.

The concrete structure is a very durable structure, and its use 20 does not subsequently cause repair and maintenance work on other street structures. The planting box can also be easily dismantled and, if necessary, reused in another location.

Already in the foundation phase, the precast concrete structure is clearly cheaper than other solutions, and the cost-effectiveness is emphasized over the years in terms of repair and maintenance costs.

i

Claims (7)

1. Planting sled of element structure intended to protect the roots of old and new street trees and as support for the ground grids, characterized in that the planting sled's elements 5 (1, 2, 3, 8 and 9) are beam-like in shape and intended to be pinned together similar to the corner joint in a log structure to a frame of leather shape and the desired height, that the beam elements are of concrete, lighter concrete or corresponding non-rotting, non-rotting material, and that the lower beam bearings (3) which are raised with the roots, are provided with openings. Planting sled according to claim 1, characterized in that the corner joints (4) of the beams are so-called. salmon tail joints or equivalent reading joints. 15 Planting sled according to claim 1 or 2, characterized in that matching sponges and nets (5) are provided in the surfaces of the beams that meet. Planting sled according to any one of claims 1-3, characterized in that through the ends of the beam elements there are through-going heels (6) which will be aligned with each other, for fastening the elements to each other and to the foundation with frame tabs. or tubes. 25 Planting sled according to the preceding claim, characterized in that the top layer (1 and 2) of the planting sled is made of whole beams. 6. Planting sled according to some preceding claim, characterized in that the beam openings (7) which are at the height of the roots become smaller towards the interior of the slate. Planting sled according to any preceding claim, characterized in that the height varies at least part of the beams (8) from one end of the beam to the other with consideration of the slope of the ground surface, 1;