WO1996021770A1 - Method and equipment for establishing preferably temporary activity areas in or close to cities - Google Patents

Method and equipment for establishing preferably temporary activity areas in or close to cities Download PDF


Publication number
WO1996021770A1 PCT/DK1996/000019 DK9600019W WO9621770A1 WO 1996021770 A1 WO1996021770 A1 WO 1996021770A1 DK 9600019 W DK9600019 W DK 9600019W WO 9621770 A1 WO9621770 A1 WO 9621770A1
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Patent type
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French (fr)
Frede Andresen Petersen
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Frede Andresen Petersen
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    • E01D2/00Bridges characterised by the cross-section of their bearing spanning structure
    • E01D15/00Movable or portable bridges; Floating bridges
    • E01D15/12Portable or sectional bridges
    • E01D2101/00Material constitution of bridges
    • E01D2101/30Metal


In order to establish temporary activity areas in or near larger cities it is proposed to make use of existing wet areas, on which platforms (2, 10) are established by means of a principally known technique for building light bridges, which are here mounted side by side so as to form a large floor. An associated large number of tubular bridge poles (38) ensure a high carrier capacity, and these poles are easy to mount by a direct flushing down, while, as an important matter, they are equally easy to dismount in being forced up by means of pressurized water or air. The mounting and demounting can be effected using simple auxiliaries, including a one man operated crane having guiding means for the poles (58, 60), and a high degree of stiffness in the construction is achieved by the use of individually tightened chain cross-struttings (44, 46) between the poles (38) of each pair or poles. The mounting can be effected with a low number of standard components and without help from the water side.



The present invention relates to the establishing of pre¬ ferably temporary supports for exhibition pavilions or other space requiring arrangements, in particular in city areas. Normally, most larger cities have a free area suitable for cattle shows, setting up of circus tents and various other activities, but that kind of areas will normally be located at the periphery of the city, whereby they are not optimally applicable in case of more prestiged arrangements. To a cer¬ tain extent, it is possible to erect an exhibition pavilion at the Town Hall Square , but normally not without associated nuisances and of course with marked restrictions with respect to the area of the pavilion system.

The invention is based on the consideration that almost every larger city exhibits a large wet area that will be per- fectly suited for the purpose, if care is taken to establish a floor construction of the required carrier capacity above the water surface.

For an immediate consideration it is possible for this purpose to lay out a number of floating pontoons, which can be joinable into a carrier surface with the required large size and carrier capacity, but calculations show that this will be a very expensive solution.

With a preferred embodiment of the invention there is, instead, made use of a simple bridge building technique, whereby the large carrier surface is established by building out and laterally joining the required number of single bridges. These bridges may in a simple manner be constructed so as to be individually and then also collectively strongly carrying, viz. by their contact with the underlying sea bot- torn, via support plates of noticeable width, whereby the re¬ quired carrier capacity is fully secured. By the use of sim¬ ple pole tubes, as disclosed in WO 92/12295, it is easy to mount the poles by flushing directly through the tubes, and for the present purpose it is an important possibility that the poles can later on be taken up in a correspondingly easy manner, viz. by forcing air or water down through the pole tubes. So far, this possibility has been connected with a possible season conditioned withdrawal of light jetties or bathing bridges, but with the invention it has been realised that the easy demountability may simply be economically deci¬ sive for the planning of the entire, temporary construction.

Almost all parts of the system may be reused after de- mounting, whereby the system could be established on a rental basis.

In the following the invention is described with refe¬ rence to the drawing, in which:

Fig. 1 is a perspective view of a platform system estab- lished at a lake area in accordance with the invention;

Fig. 2 is a similar view of a more differentiated system, shown with added pavilions;

Fig. 3 is a perspective view of a basic bridge construc¬ tion; Fig. 4 is a similar view of parts of a mounting crane, and

Fig. 5 is a top view of a bridge system during mounting.

The system shown in Fig. 1 is a large carrier platform 2 established in a river or lake area or for that sake in a sea or swamp area at or near a central city area for the purpose of forming a preferably temporary support for some special arrangement such as a special exhibition or a series of sum¬ mer concerts, optionally with added, associated light pavil¬ ions. The platform is connected with the seaside through an admission bridge 4, which, as indicated, is provided as an ordinary bathing or boat bridge of double width, or rather as a parallel system of two such bridges, which may each have outer support poles, though with the middle poles in common, as explained in more detail below. The platform 2 is built in a widely corresponding manner, viz. as a very broad row of joined, parallel bridges 6 with bridge units 8 that can be built out from the central bridge and, as desired, mounted rowwise in the length or width di¬ rection of the bridge 4.

It would of course be possible to construct the platform in any other manner, but according to the invention it is ad¬ vantageous, from a dimensioning point of view, to consequent- ly consider and design the platform as a multi bridge, as the stability and the carrier capacity will then automatically be ensured for the construction as a whole, and it is possible to make use of a relatively simple mounting technique by the one by one mounting of the bridge units 8. This is dealt with in more detail below.

Fig. 2 shows a construction built as a system of mutually bridge connected platforms each carrying a domed conference or exhibition pavilion 12, which has been developed as a spe- cial aspect of the invention.

Hereafter, the relevant bridge building technique will be described in more detail. As mentioned, there is departed from the basic technique disclosed in WO 92/12295, according to which the bridge poles are metal pipes which are mounted by auto flushing , i.e. with the use of the pipes themselves as lasting flushing spears, until it is desired to demount them by a correspondingly simple technique, viz. by forcing air or water down through the pipes. Each new bridge unit is mounted by means of a lightweight crane, which is anchored to the former outermost bridge unit and via a jig carries the new bridge element temporarily in such a manner that this element can be used as a working platform for the flushing down of the next pair of poles, to which the new element is to be secured, while it is also secured to the outer end of the previous outer bridge unit.

According to the invention it has been realised that this mounting technique may be used for bridge building not only longitudinally, but also in the cross direction, as this will just be a question of turning the crane and keep it secured to the relevant bridge unit, whether this is an outer unit or an arbitrary unit of an already established bridge structure, whereby broad bridges - or whole platforms - may be con¬ structed as desired, by a combined length and/or width expan¬ sion of an already established unit 4. Thus, according to the invention it will be important that the crane and/or the bridge are designed such that the crane can be anchored for paying out new bridge elements in both the length and cross direction of an already mounted bridge unit. It is natural that the bridge units have a length bigger than their width, so the mounting crane should primarily be designed to cooperate with the narrow front dimension of the bridge. However, according to the invention this will in no way prevent the crane from also being usable for cross mount¬ ing, if the base unit is permanently or only temporarily pro¬ vided with means for holding the crane, preferably for re¬ ceiving base pins of the crane both in the outer pole pipes of the carrier unit and in socket pieces permanently or tem- porarily secured to the sides of this unit.

The crane, of course, is a relatively heavy unit, but ac¬ cording to the invention it may well be divided into two in¬ dividual halves for mounting at the respective sides, just as each of these halves may be divided into a chassis portion and a jig projecting therefrom. It is then achievable that the crane in its entirety can be moved, mounted and demounted as well as used by a single operator only.

According to the invention it has been found important for the stability of the bridges with the relatively thin pole pipes, 1) that the poles are flushed down into the sea bottom by a considerable length, preferably some one through two and a half meters, 2) that the poles are provided with a bottom engaging plate of a substantial size, preferably of the magnitude 50 x 50 cm, and 3) that, as a main rule, each pair of opposed poles is stabilised by means of a wire or chain cross strutting with a wire or chain tightened between the bottom plate area of the single poles and the upper bridge element area of the respective opposite poles. With the use of conventional chain tightening devices it is possi- ble for a single operator to secure a high degree of tighten¬ ing in these cross connections, whether or not the two bottom plates are located in exactly the same level. The tightness can be secured just because the poles are not only supported on or by the sea bottom by means of the said bottom plates, but additionally by virtue of the fact that the flushed down parts of the poles are prevented from being laterally dis¬ placed by the cross oriented tightening forces. Should the poles exceptionally be drawn together by the strong tighten- ing forces it will be possible to stabilise them by the mounting in of a pressure resistant beam at the bottom.

In the following, a preferred detailed embodiment of the system will be described: Fig. 3 shows one end of a bridge unit according to the invention. The unit or element comprises profiled side mem¬ bers 20 of aluminium, prepared with bolt holes at the rele¬ vant places. The side members are held together by means of a few traverses 22. At the top the side members have interior grooves 24 forming support for the ends of cross oriented boards 26. These boards are mounted on joists 28 resting on the traverses 22. The flooring may be made as pallets, such that the bridge element can be finished e.g. by a laying out of three such pallets. At places adapted for holding poles the side members are internally reinforced by bolted plates 30 adapted to receive tightening bolts for outer pipe mounting brackets 32, and these plates are rigidly provided with a strong hook 34. At their free ends the side members are provided with inwardly projecting bolting fittings 36, by means of which they are joinable with similar elements.

In their mounted condition the single elements are car¬ ried by an end joint with the preceding bridge unit and by two exterior poles in some distance from the opposite end of the element. The poles are pipe pieces 38, which are each provided with a bottom support plate 40 effectively secured by means of a pipe clamp 42 at the relevant place. The poles are flushed down until the bottom plates engage the bottom (even if the latter is not fully rigid) , and when then the poles have been secured to the side members, a chain 44 pre- connected to the pipe clamp 42 is tightened crosswise up to the hook 34 at the opposite pole. At their top ends, these chains are fitted with tightening devices 46 that will enable a very strong tightening of the chains.

The bridge elements are brought out as shown in Fig. 4 by means of a light auxiliary crane 50 at either side. These crane sections can be mounted by lowering of a holding pin 52 into the last mounted pole 38 and, preferably, another hold¬ ing pin 54 into a purpose related holder 56 temporarily se¬ cured at the outer end of the side member 20. With the use of the indicated hoisting and running system the open element frame can then be brought to the position shown in dotted lines and from there be lowered into its regular position. From the formerly outermost end of the bridge it is now easy to work out the required bolt joining of the end plates 36, and thereafter the said flooring pallets may be successively laid out on the new section.

Thereafter, this new bridge element can be used as a working platform for the flushing down of its own carrier poles 38. Each pole is placed in an approximately correct po¬ sition and is then anchored in a hoist strap or claw 58, the hoist wire of which is arrested such that the pole pipe can now be handled in weight relieved condition. It is then placed more accurately, i.e. vertically at the mounting place next to the side member 20. As an important detail the crane is provided with an openable, upper guiding ring 60, which, when the crane is correctly mounted, is located vertically above the prepared joining area, whereby the pole pipe can be caught in this ring, which is then closed. Thereafter the mounting bracket 32 is mounted loosely about the pipe, and then the flushing down is effected, now with the pipe suit- ably guided. After the flushing down, the bracket 32 is se¬ cured rigidly. When also the other side is ready, the floor¬ ing pallet in the working area is taken up and the said mounting and tightening of the cross chains 44 is effected. Thereafter the work can proceed with the next section, the auxiliary holder 56 and the crane being moved out on the just mounted section.

It is possible to construct a bridge of double width by a corresponding erection of a neighbouring bridge, whereby the two bridges may share a row of middle poles, as indicated to the left in Fig. 3. In that case it is sufficient to make use of brackets or clamps 32 prepared with a welded on top plate 60, which can be used for direct fastening of the parallel bridge at the relevant side. Finally, cover profiles 62 may be mounted over the pole slot between two or more such parallel bridges, whereby a planar large floor can be provided.

As mentioned, according to the invention the method is not limited to such a forwardly progressing mounting, as it is possible to cross turn the crane equipment as schemati¬ cally shown in Fig. 5. The supporting crane chassis may have a length of 60 cm, whereby, if bridge elements of 2 m are used, there will be sufficient space to place a bridge ele- ment 64 lengthwise and cross displaced in front of the cross mounted crane without the bridge element overbalancing. Thereafter, the new element can be hoisted out and mounted fully analogous to the above description. The guiding ring 60 on the crane can be displaced along the jig and is thus mov- able to a standard position suited for such a cross mounting. As it is thus possible to freely build out in both the longitudinal and the transverse direction, it will be equally simple to establish constructions as shown in Figs. 1 and 2. It will be appreciated that the described details with respect to bridge building are also well usable by the erec¬ tion of single bridges, not least as far as the tight chain crosses are concerned.


C L A I M S :
1. A method of establishing permanent or preferably tem¬ porary activity areas in or near cities, e.g. for erection of exhibition pavilions, characterized in that the area is con- structed as an extensive bridge system in wet surroundings with the use of the type of mounting technique based on bridge poles with integral flushing channel means, preferably simple pipes, which are flushed down into the area bottom and mounted with bridge elements, whereby a desired number of bridges are erected side by side, preferably with intermedi¬ ate common poles and with slots between the bridges covered by cover plates.
2. A method according to claim l, characterized in that the bridges are built with profiled side members secured to the inner sides of the associated poles and used for carrying separately mounted bridge elements.
3. A method according to claim l, characterized in that a wire or chain cross-strutting is tightened between respective top and bottom portions of opposed poles.
4. A method according to claim 1, where an auxiliary crane is used for the bridge building, the crane being mount- able on the outer end of each newly established bridge sec¬ tion, operable as a temporary carrier for the next bridge element so as to make the latter usable as a working platform for the flushing down of the proper poles of this element, characterized in that the crane at selected places is mounted across an established bridge section for building out the same with a parallel neighbouring bridge section.
5. Equipment for use with the method of claim 1, compris- ing a jig crane to be mounted at the outer end of an estab¬ lished bridge section for the bringing out of a following bridge element, characterized in that the crane jig at its outer end is provided with an openable guiding ring for the upper end of a pole to be mounted, and that the crane and it mounting fittings are so adapted that this ring will be lo¬ cated just above a pole holder on the side of the brought out bridge element.
6. Equipment for use with the method according to claim 1, characterized in that it is made substantially as shown in Figs. 3 and .
PCT/DK1996/000019 1995-01-11 1996-01-11 Method and equipment for establishing preferably temporary activity areas in or close to cities WO1996021770A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DK3195 1995-01-11
DK0031/95 1995-01-11
DK0904/95 1995-08-11
DK90495 1995-08-11

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU4329796A AU4329796A (en) 1995-01-11 1996-01-11 Method and equipment for establishing preferably temporary activity areas in or close to cities

Publications (1)

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WO1996021770A1 true true WO1996021770A1 (en) 1996-07-18



Family Applications (1)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222874A (en) * 1962-02-12 1965-12-14 Frank J Zink Structural framework for boat piers
US3345825A (en) * 1965-01-18 1967-10-10 Louis F Parker Portable dock
US4761096A (en) * 1987-02-24 1988-08-02 Lin Sheng S Universal footing with jetting system
WO1992012295A1 (en) * 1991-01-14 1992-07-23 Frede Andresen Petersen Method and equipment for working down and taking up light poles and for building light bridges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3222874A (en) * 1962-02-12 1965-12-14 Frank J Zink Structural framework for boat piers
US3345825A (en) * 1965-01-18 1967-10-10 Louis F Parker Portable dock
US4761096A (en) * 1987-02-24 1988-08-02 Lin Sheng S Universal footing with jetting system
WO1992012295A1 (en) * 1991-01-14 1992-07-23 Frede Andresen Petersen Method and equipment for working down and taking up light poles and for building light bridges

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