EP1805366B1 - Multipurpose route consisting of laminated wood - Google Patents

Abstract

The invention relates to a multipurpose route consisting of vertical supporting pillars and horizontal route sections which are adjacently arranged on the supporting pillars, a plurality of route sections forming at least one superimposed track or bearing surfaces for lines, and comprising a continuous cavity inside over the entire length of the multipurpose route. The supporting pillars and/or the route sections consist of laminated wood, and the longitudinal surfaces of the individual route sections are trapezoidal. The route sections are alternately arranged in relation to each other such that the oblique front sides thereof lie against each other respectively with the essential part of the surface thereof in a non-positive or positive manner.

Description

The invention relates to a multipurpose road consisting of vertically extending pillars and horizontally extending route sections, which are arranged in rows on the pillars, wherein a plurality of train sections form one or more superimposed routes or support surfaces for lines, and inside a continuous over the entire length of the multipurpose road cavity exhibit.

From the prior art ( DE 43 04 434 A19) is a widely used track known, consisting of steel columns steel columns and cross members and Fahrwegelementen. The track elements are hollow cylindrical concrete finished parts with openings in the radial direction for the passage of the cross member. Rail-like elements, embedded in the top and bottom of the track elements, allow the passage of the route by rail vehicles, or by suspension railways. The interior of the hollow cylindrical track elements serves to accommodate water pipes, pipelines or cables. Disadvantageously, steel, unlike wood, is a non-renewable and therefore long-term, very expensive raw material. In addition, the use of steel for supporting structures, such as for a multipurpose road or for the bridges, in particular, the temperature-dependent expansion or shrinkage of steel components is taken into account. This is especially important when such components are used in permafrost areas.

Against this background, the object of the invention in the construction of a multipurpose road, whose components are also in change the temperature fluctuations as small as possible, the stresses associated with the extension of the route in the longitudinal direction, should be largely neutralized by the geometry of the contact points of the horizontally oriented path sections.

The solution to this problem is achieved by the construction of a multipurpose roadway, which is characterized in that the supporting pillars and / or the track sections consist of laminated timber, and the longitudinal surfaces of the individual route sections each have a trapezoidal shape, and the route sections have obliquely extending end faces, wherein the route sections alternating, resp are arranged alternately to the column head, so that their oblique end faces in each case with the substantial part of its surface frictionally or positively abut each other.

The glued wood known from the wood glue construction can consist of solid wood, plywood or hardboard webs and always has a layered structure, wherein the usually consisting of the same type of wood layers are combined to form a wooden support of any shape. As glues for the production of laminated wood, all weather-resistant glues, in particular hard-material resins, are suitable, which harden after the addition of hardeners (for example ammonium chloride) at usually higher temperatures. But glues of acrylate and Pheynolharz- and resorcinol resin base can be used.

The plates to be assembled together with the laminated wood may be provided with teeth or profiles on the surfaces in contact with one another, which increases the stability against shear forces. Laminated wood can be processed in the same way as solid wood, but advantageously has a lower shrinkage or expansion with temperature fluctuations. The coefficient of expansion parallel to the fiber is 0.005% for spruce and fir. When glue-wood is compensated by the opposite direction gluing several pieces of wood, the change in length of the individual wood part. In addition, the individual layers of wood are gently dried before gluing.

The term travel distance in the sense of the invention comprises roadways both for rubber-tired vehicles that can be steered independently, and for rail-guided vehicles. Rail-guided vehicles include both conventional railway trains as well as maglev trains and air-cushioned vehicles.

The core idea of the invention is the use of the renewable raw material wood for a multipurpose road, which consists of strung on pillars, trapezoidal route sections. Glued wood is used for the production of the module-like modular track sections and the buttresses. This multi-glued wood is characterized by various, interesting for the construction of tracks and valuable building physics properties.

The temperature- and moisture-dependent shrinkage and expansion of laminated wood is comparatively low. The changes in length nevertheless occurring within the route sections are compensated according to a further core idea in that the route sections are arranged alternately, wherein the oblique end faces are in contact with each other with the essential part of their surface and can slide in the vertical direction thereon.

In addition, the thermal conductivity of glued timber is low, so that the intended in the interior of the route sections for the installation of pipes cavities isolated from the outside are. Extreme temperature fluctuations, especially in permafrost areas, can be intercepted. This characteristic is particularly important in winter, when the delivery temperatures of oil are above 50 °. Due to the extreme temperature gradient between the outside area and the interior of the pipe, cracks and breakage can occur without insulation in steel pipelines, which therefore have to be isolated in a complex manner. However, track sections made of laminated timber with corresponding cavities for receiving pipelines are load-bearing parts and insulation in one.

In a further development of the invention, it is provided for additional stabilization of the rising laminated timber components that they are pegged at least in the outer regions. The penetration of moisture into the outer areas and the resulting frost damage can be avoided in this way.

It is envisaged that the angle of inclination of the end edges of the trapezoidal path sections with respect to a line aligned perpendicular to the base line is at least 5 °. It goes without saying that the length compensation between the expanding and shrinking path sections with less resistance occurs when the inclination angle is greater. Since with increasing inclination of the end faces, the edges on the base with the longer longitudinal edge is more susceptible to breakage, the upper limit of the inclination angle is given by the stability of the glued timber in this edge region.

In order to overcome the initial resistance of the movement of a line section which expands under the influence of heat, it is provided that those route sections whose shorter longitudinal side forms the lower edge of the route and which with their Resting end portions on the pillars, each resting on a wedge. The wedge is arranged so that it increases in the direction of each of the adjacent route section.

It is conceivable that the supporting pillars for receiving the route sections are arranged in one or more rows. The double row arrangement of buttresses is recommended for correspondingly wide carriageway routes.

It is within the scope of the invention that several routes are arranged one above the other and next to each other. It is also conceivable that several routes are only arranged side by side. The routes can be positioned above or below the hollow body, which span the multipurpose road. If the route is arranged below the cavities leading to the pipelines, there is advantageously a roofing of the route, which makes sense especially in areas with heavy snowfall. A snow pad on an uphill route is easy to remove because it can fall off the side of the road during snow removal.

Of course, the cavities provided for receiving pipe or supply lines can be arranged in various ways. To achieve the best possible insulation is proposed to arrange the cavities parallel next to each other. If the route runs above the cavities, the upper side of the cavities is advantageously isolated as well.

Since moisture can penetrate into the front sides of the glued timber, it is provided that the end faces are sealed. In order to prevent moisture from penetrating between the route sections, it is provided that in the region of the frontal contact points on the outside circumferential seal is attached. Ideally, this seal is made of a stretchable, permanently elastic material such as rubber or silicone. This outside circumferential seal can also be very useful for thermal insulation of the lying in the interior of the route sections cavities and the piping guided therein. In this case, it is conceivable that the individual compartments are also isolated from each other.

Alternatively, the seal between the end faces of the route sections also consist of an acid-resistant round steel or a rounded, U-shaped, acid-resistant spring steel profile, which is applied flat against the beveled end faces of the compartments and thereby protects other, additional sealing media against any acid damage. If the sealing or mutual isolation of the individual compartments in the interior of the route is also required, the walls of the walls, which form individual compartments, are also at the ends. a seal on. This gives the sealing elements a grid-like structure and are inserted in this form between the individual route sections.

The connection of the route sections through additional elements is not absolutely necessary if the coherent structure of the route already creates a stabilization that extends over several route sections. In principle, however, it is conceivable that the end-side contact surfaces of the route sections each have complementary to each other shaped, eg groove-like structures that prevent the lateral slipping.
Alternatively, dovetail-shaped grooves or springs can be embedded in the wood on two adjacent line sections.

Such grooves and springs can also be formed as separate components made of metal or plastic and embedded in the wood on the front sides of the route sections and secured. In particular, in seismic areas, such an embodiment may be advantageous. It is also possible to use steel bolts and / or screw-in sleeves. With these or similar solutions according to the current state of the art, lateral slippage of the track sections which are displaceable relative to one another in the longitudinal direction due to the inclination of their end edges is prevented.

It is within the scope of the invention that abut iron profiles with angular cross-section at the aligned in the horizontal direction edges of the route sections. The thigh thickness of the profiles is approx. 20 mm. The angle profiles serve to protect the track sections and can additionally stabilize or seal the glued-wood parts joined together with the edge region.

In the context of the invention it is provided that the pillars are embedded in foundations of concrete. These foundations can be cast at the site or prefabricated. Sand is introduced into the space left between the buttress and the opening in the foundation. By shaking it is ensured that the sand bed is packed as tightly as possible and thus optimally stabilizes the buttress. The sand bed also allows optimal damping of vibrations in the lateral direction. The sand bed is sealed off at the top by a seal to protect against weathering and plant seeds. This foundation and column construction makes sense for a route that is only used temporarily - eg on a construction site railway - because it allows for easy disassembly and reuse of the columns. Another advantage is the ability to adjust the orientation of the support.

In the standard version of the multi-purpose road, the pillars are distributed so that they are each arranged below the joint between two adjacent road elements. In addition, additional pillars may be provided therebetween. Especially when viewed in the direction of the route, very narrow and / or very wide line sections, the multipurpose road can be more economical overall.

Another advantageous variant is proposed for multipurpose roads with particularly often accelerating and decelerating traffic - such as mass transport systems with numerous stopping stations - and / or for particularly large fluctuations in the ambient temperature and resulting large fluctuations in length. In these cases, the buttresses may be provided with at least one slot aligned in the bearing direction and perpendicular to the longitudinal axis of the route. As a result, the pillars gain elasticity and can be pivoted in the direction of travel of the train or in the direction of length expansion or shortening by a small angle.
Then it is possible to replace the otherwise usual for bridges at one end conventional floating bearing with its wear-prone - roles by a fixed bearing. The changes in length of each route section are compensated by slight pivoting of the pillars.
It may be useful to pass shock absorbers between the adjacent track sections in order to pass on the brake thrust forces from one track section to the next track section. As a result, the occurrence of unwanted vibrations, especially during emergency braking with maximum delay can be avoided. A particularly simple variant is the principle of a friction shock absorber. For this purpose, a friction plate on one of the support pillars across the slot Side of the slot rigidly attached, for example by screwing. On the other side of the slot, the plate is pressed with a defined force against the buttress. For z. B. by screws depressed coil springs suitable. Of course, however, all other types of shock absorbers, eg. B. piston shock absorber used.

When using the multipurpose pipeline as a pipeline, it can be very important that the joint between the route sections be effectively sealed. And also with changes in length, as they can be caused by temperature fluctuations and / or braking. For this purpose, the invention proposes a U-shaped profile of permanently elastic, acid-resistant material. A suitable material is z. B. spring steel. This profile runs along the joint and is fitted in such a way that one leg of the profile bears against an end edge of a route section and on the other side an angled region, which is provided with barbs, presses into a slot. Between the two legs another seal made of hard rubber is inserted. This seal should be supplemented by a thermally insulating strip in the joint between two sections of track, which in turn is covered on the outside with a permanently elastic material.

If the length extension of a route section can be completely compensated by the influence of temperature by such a seal, the trapezoidal side contour of each route section serves as a security element in the case of unusually high changes in length, z. B. by extremely high temperatures and / or earthquakes or otherwise caused disturbances on one or more buttresses. In such an (in) case, the seal would suffer, but the route section could be without Damage be pushed upwards and be reused after repair of the buttresses.

A further advantageous embodiment, in particular for routes that have a very small cross-section or in which several chambers do not overlap one another for superordinate reasons, but must be arranged next to each other, it may be economically useful to introduce metal reinforcements in the glue wood. For this purpose, the invention proposes steel bands, they are mounted between the sections of glued timber or to the outer edge. A simple variant for fastening is the drilling, punching or burnout of holes through which screws or dowels are guided. For higher demands on the strength of the steel strip, the invention prefers to weld steel bolts to the steel strip, which engage in corresponding holes in the laminated wood.

To generate a bias, this steel strip can be heated prior to installation. As a result, it expands. When installed in the heated state, it contracts again by cooling; This creates a bias.

Another possibility for reinforcing the laminated timber profiles is the introduction of steel profiles. As an interesting variant to their attachment, the invention proposes to punch the steel plates over a large area. Through these holes wooden dowels can be performed, which engage in corresponding holes of glue wood panels on both sides of the wood profile. This allows the transfer of forces across the steel profile. The steel profiles can be glued to the wood. If the adhesive is permanently elastic, it can also serve as corrosion protection. The dowels then take over the transmission of forces.

For the use of the multi-purpose route as a pipeline, the possibility to shut off partial areas makes sense. In a further, meaningful embodiment variant, a gate valve is proposed, which can be inserted from a slot in a supporting pillar 2 by means of a threaded spindle and a nut movable thereon into the free cross section of the route (3).

Another variant of the connection of two route sections is a short section with the same cross-section as the long route sections. This short section is beveled on both sides. Each end edge can be made in all forms according to the invention. The short section is placed on a support, but leaves space on both sides for the placement of a long line section (3). The decisive advantage of this variant is that the level of the lanes remains the same even with strong temperature fluctuations and the resulting large changes in length from one route section 3 to the next. It only changes the length of the road. The compensation of these changes in length by comb-like compensating elements in the surface of the road or the rails is one of the prior art in bridges.

The multi-purpose route is predestined for the construction of supply and / or traffic routes in rough terrain. In these cases, it can be economically advantageous to save the establishment of an additional road next to the track for bringing building materials and construction workers. For this purpose, the invention proposes that the multipurpose road is supplemented by trolley and a crane, which are movable on top of the route elements and as an option also within the route elements. The crane should be dimensioned so that it is responsible for the transfer of a complete line section from the trolley over itself or to itself past the end of the line. In a further expansion stage, the boom of the crane can be dimensioned so that it can pick up from the end of a route section from a pre-assembled pillar from the trolley and position and settle at its destination.

For the production of a multi-purpose road, which is equipped with such a crane including a trolley, the following procedure offers cost advantages in the total costing: Crane trolleys and transport trolleys are placed on an already assembled route section. the trolleys take on at least one further route section and / or pillars and / or other material for the further construction of the multipurpose road. The trolleys are coupled to the crane truck. With the crane as the first vehicle such a train is moved to the end of the already assembled part of the multipurpose road. There, the crane empties the trolley. It is designed so that it either pivots the parts laterally or raises over itself until they are spent and positioned at the other end of the route. Depending on the degree of prefabrication of line sections and buttresses, line sections and pillars can only be moved to the final position after being set down by the crane and completed there. However, the fastest progress in the construction of the track is achieved when both buttresses and track sections are already fully preassembled and the reach and positioning accuracy of the crane is sufficient to pivot and position the buttresses as well as the track elements to their final position.

Figur 1:

Vielzwecktrasse aus der Seitenansicht

Figur 2:

Stützpfeiler mit Trassenabschnitt im Querschnitt.

Figur 3:

Dichtung zwischen Trassenabschnitten

Figur 4:

Vielzwecktrasse mit Kurzsektionen zwischen den lan gen Trassenabschnitten

In the following, further details and features of the invention will be explained in more detail by way of examples. However, the examples shown are not intended to limit the invention, but only to explain. In a schematic representation:

FIG. 1 :

Multipurpose road from the side view

FIG. 2 :

Support pillar with route section in cross section.

FIG. 3 :

Seal between line sections

FIG. 4 :

Multi-purpose route with short sections between the long route sections

FIG. 1 shows the multipurpose road 1 from the side view, wherein the box-shaped route sections 3 are shown in section. The bearing on vertical vertical columns 2 route sections 3 form with their interior a multipurpose track 1 in its entire length spanning hollow body 6. In the example shown, the route 4 can be arranged both on the top of the route sections 3 and within the cavity 6. In the side view, the route sections 3 are trapezoidal and are arranged alternately with the long side of the trapezoid once up and then down. The inclination of the end faces with respect to the base of the route sections 3 is in the example shown about 5 °. If, due to an increase in temperature, the expansion of the glued timber sections of the track occurs, in the example shown, in each case, the long side facing upwards the track sections 3 shift in the vertical direction.

In the example shown, the track sections 3 bearing their short longitudinal side on the supporting pillars 2 do not rest directly on the abutment pillars 2 at the top, but rather on a between the This wedge derives on extension of the track body 3 due to a small increase in temperature, the longitudinal movement in the vertical direction, ie upward to the top of the pillars 2 and the bottom of the route sections. As a result of the beveling of the end faces, the upward movement is continued to a greater extent in the event of further temperature increases, that is to say in the case of even greater expansion of the route sections 3. Advantageously, the multipurpose road remains tension-free in this way over its entire length, regardless of the respective temperature.

The lower end of the pillars 2 is embedded in a foundation 8. Between the lateral surface of the pillar 2 and the inside of the foundation 8 is a sand bed 10. A seal 9 prevents the deterioration of the sand bed 10 due to weather or the ingress of living beings or plant seeds. The expandable seal 9 and the sand bed 10 allow the absorption and attenuation of lateral vibrations of the pillars. 2

FIG. 2 shows a pillar and a route section in cross section. The bearing on the pillar 2 route section 3 is divided into several cavities 6 inside. The cavities 6 are accessible and serve to receive pipes 5. In the example shown, the route 4 is provided on the upper side of the route sections 3. On the front side of the route section 3 is a seal 11 made of round steel, which also seals the running between the compartments in the vertical direction walls. The seal 11 has a grid-like structure in this embodiment due to the additional, parallel rods.

At the running in the horizontal direction edges of the route sections 3 are angle profiles 12 made of metal with L-shaped cross-section. The angle profiles 12 are used for protection, stabilization and additional sealing of the route sections 3 in this area.

The lower end of the pillars 2 is embedded in a foundation 8, wherein a sand bed 10 receives the lateral vibrations of the support pillar 2. The sand bed 10 is closed at the top by a seal 9.

FIG. 3 shows each a portion of two path sections 3 with a joint between the end edges. On these edges presses a U-shaped sealing profile 13: On one edge it is flat, on the other edge it engages with a barbed, angled strips in a slot. Within its two legs is a rubber seal 15, which additionally presses on one of the two edges. In the joint between the route sections 3 also a thermal insulating strip 15 is also introduced, which is protected to the outside by a further rubber seal.

FIG. 4 shows the side view of a multipurpose road in a variant with the short sections 14 on the pillars 2. In this variant, all the route sections 3 with the long side upwards. In FIG. 4 It is understandable that in this variant, the level of the lanes remains the same even with strong temperature fluctuations and resulting changes in length of a route section 3 to the next.

LIST OF REFERENCE NUMBERS

1.

Multipurpose route

Second

vertical supporting pillars

3

Trace sections, in trapezoidal shape

4th

driving route

5th

Lines for electricity, gas, water etc.

6th

cavities

7th

Wedge-shaped support

8th.

foundations

9th

foundation seal

10th

sand bed

11th

Seal on round steel

12th

Angle profile, horizontal on track sections 3

13th

U-shaped sealing profile, between the front edges of the route sections. 3

14th

Short section, with the same cross-section as the route section 3, but only of very short length, beveled on both sides, arranged on supporting pillars 2

15

Rubber seal, between the thighs of 13

16

thermal insulating strip, in the joint between the route sections 3

Claims (25)

1. Multipurpose route (1) consisting of

   - vertical supporting pillars (2) and

   - horizontal route sections (3), which are adjacently arranged on the supporting pillars (2), a plurality of route sections (3)

   - forming one or more roadways (4) lying one above the other or support surfaces for lines (5), and

   - having in the interior a hollow chamber (6) that passes through the entire length of the multipurpose route (1),

   characterised in that

   - the supporting pillars (2) and/or the route sections (3) consist of laminated wood, and

   - the longitudinal side surfaces of the individual route sections (3) are trapezoidal in each case and the route sections have oblique end faces,

   - the route sections (3) being arranged alternately with respect to one another such that their oblique end faces in each case lie in non-positive or positive engagement with one another over a substantial portion of their surface.
2. Multipurpose route (1) according to claim 1, characterised in that the laminated wood is additionally dowelled at least in the outer regions.
3. Multipurpose route (1) according to one of claims 1 and 2, characterised in that the trapezoidal angle of inclination of the end-face contact surfaces of the route sections (3) is at least 5° with respect to the base surface.
4. Multipurpose route (1) according to one of the preceding claims, characterised in that the end sections of those route sections (3), whose shorter longitudinal sides are arranged downwards, lie on a wedge (7), which rises towards the adjacent route section (3).
5. Multipurpose route (1) according to one of the preceding claims, characterised in that a plurality of roadways (4) are arranged one above the other and/or side by side.
6. Multipurpose route (1) according to one of the preceding claims, characterised in that the route sections (3), in the region lying below or above the road sections (4), have a plurality of hollow chambers (6), which pass through the length of the multipurpose route (1) and lie one above the other and parallel to one another.
7. Multipurpose route (1) according to one of the preceding claims, characterised in that the supporting pillars (2) are arranged in one or more rows.
8. Multipurpose route (1) according to one of the preceding claims, characterised in that oblique end contact points between the route sections (3) are sealed with permanently elastic sealant.
9. Multipurpose route (1) according to one of the preceding claims, characterised in that at the end contact points between the route sections (3)

   - a surrounding gasket is mounted externally and/or

   - a gasket is mounted surrounding externally and between the compartments.
10. Multipurpose route (1) according to one of the preceding claims,
    characterised in that the route sections (3), have, vertically, structures have forms that are complementary to one another or one or more dovetail profiles.
11. Multipurpose route (1) according to one of the preceding claims,
    characterised in that angle profiles (12) of L-section metal bear against the vertical edges of the route sections (3).
12. Multipurpose route (1) according to one of the preceding claims,
    characterised in that the groove-like structures with complementary forms or the dovetail profiles are embodied as metal or plastic components and can be fixed on the end faces of the route sections (3).
13. Multipurpose route (1) according to one of the preceding claims,
    characterised in that the supporting pillars (2) are embedded in foundations (8) of concrete.
14. Multipurpose route (1) according to claim 13, characterised in that a sand bed is provided between the foundation (8) and the supporting pillar (2) which is closed off at the top by a gasket (9).
15. Multipurpose route (1) according to one of the preceding claims,
    characterised in that at least one route section (3) rests on at least three supporting pillars (2).
16. Multipurpose route (1) according to one of the preceding claims,
    characterised in that the supporting pillars (2)

    - are provided with at least one slit, which is oriented in the vertical, supporting direction of the supporting pillar (2) and transversely to the longitudinal axis of the route sections (3),

    - and the route sections (3) can be fixed free of play on the supporting pillars (2)

    - and two route sections (3) can be connected via a shock absorber.
17. Multipurpose route (1) according to one of the preceding claims,
    characterised in that the joint between two route sections (3) is closed by means of a permanently elastic, U-shaped gasket profile (13)

    - one flank in each case of the U profile lying against, or being embedded in, a face edge of a route section (3),

    - and can be complemented with a rubber gasket (15) between the flanks

    - and/or a thermal insulation strip (16)

    - and/or a further rubber gasket.
18. Multipurpose route (1) according to one of the preceding claims, characterised in that the route sections (3) contain steel straps, which are preferably connected to the laminated wood via welded-on bolts.
19. Multipurpose route (1) according to one of the preceding claims, characterised in that the route sections (3) contain perforated steel profiles, which are connected by means of dowels in holes with laminated wood bearing against the steel profile at both sides, the steel profiles bearing directly on the laminated wood.
20. Multipurpose route (1) according to one of the preceding claims, characterised in that a route section in the form of a short section (14), which lies between two long route sections (3) and is adapted thereto, with the same cross-section, is mounted on a supporting pillar (2) and leaves space at both sides for laying on one long route section (3) in each case.
21. Multipurpose route (1) according to one of the preceding claims, characterised in that a shut-off slide comprising a slit in a supporting pillar (2) can be inserted into the free cross-section of a route section (3) or into a short section (14) by means of a threaded spindle and a nut traversable thereon.
22. Multipurpose route (1) according to one of the preceding claims,
    characterised in that at least one transport vehicle and a crane are movable on the top and/or in the hollow chamber of the route sections (3),

    - the transport vehicles being dimensioned for loading with at least one route section (3), and

    - the crane being dimensioned such that it is designed for supplying a route section (3) from the transport vehicle beyond or past the crane to the end of the route.
23. Method for producing a multipurpose route (1) according to one of the preceding claims,
    characterised in that, on an already partly mounted multipurpose route (1), transport vehicles

    - which are loaded with at least one route section (3) and/or supporting pillars (2) and/or other material for continued construction of the multipurpose route (1)

    - are run behind a crane as far as the end of the multipurpose route (1), and

    - are there unloaded from the crane,

    - the crane conveying the material as far as the final position.
24. Method for producing a multipurpose route (1) according to claim 18, characterised in that the steel strips are heated before installation in the route sections (3).
25. Method for producing a multipurpose route (1) according to the preceding claim 22, characterised in that
    at the end of an already partly assembled multipurpose route (1), the crane transfers the just unloaded transport vehicle to a different roadway within the same route section (3) or to a different route section (3), from where the transport vehicle can drive back to the loading place.

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