DE1658717A1 - Underwater tunnel or bridge in cantilever structure and, if necessary, use of the same as a support foundation using the buoyancy - Google Patents

Description

Underwater tunnel or bridge in cantilever construction and, if necessary Use of the same as a support foundation with utilization of buoyancy

Underwater tunnels that are not deep under the ground as real tunnels the river bed can be mined in individual pieces floated in, sunk and sealed under water be connected to each other. The support usually takes place on the prepared foundation base or, more recently, on pile structures. In all these cases, care must be taken that the dead weight of the actual tunnel construction is heavier than the buoyancy of the water to swim up to prevent.

In contrast to this, the subject of the application is the buoyancy used as a welcome aid for the transport to the installation site and for the assumption of dead weight and traffic loads, Furthermore, the buoyancy in suitable bridge structures under water is used to build such structures, which must be anchored in the ground by ropes or the like, as To use the foundation for bridges or the like located above the water. In these cases the buoyancy of the The Ilohlrauin construction under water is getting bigger and bigger be as the load resting on it, from those above the water Structures. The .. anchoring to the ground prevents one Floating of the hollow structure located under the water, which can consist of pipes. Depending on the length of this Construction and the resulting from the buoyancy Uiegeinomente the anchoring in the ground must be more or less far apart. Incidentally, these distances are also from the load above it from those above the water Dependent on payloads.

The transport of the underwater tunnel to the installation site can also happen using the buoyancy. This can be done in the same way that first on the bank or otherwise a suitable s te lie a more or less long piece of the Tube is produced in an open excavation. Then the construction

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The pit was flooded and the tunnel section was so heavily loaded that .esr .-; dives under barrels and hangs slightly overweight on ropes attached to floating vehicles. In seal the final position is now this part, hanging under water, moved and after completion of this first displacement process expediently anchored between temporary yokes and firmly suspended. Then the excavation is on the larid side The end is tightly sealed again and the next part of the tunnel is made in the same open excavation. Did this happen and a tight seal with the previous tunnel section is completed, the construction pit is flooded again and; he two now firmly connected foundations further moved towards the final location. This is done again in such a way that the tunnel part it is flooded to such an extent that it only swims under water with a slight preponderance and just above that under water dredged river bed floats. Depending on the length of the swimming pool This process is repeated more or less often in tunnels.

A possible cantilever construction of an underwater tunnel is shown in Figures 1 to h. Figure 5 is the possible cross section. In Figure 1, the Turinel part (i) is being built in the open construction pit with a length of 1. The dam (2) is closed. The excavation is then flooded and the dam (2) opened. Then the tunnel part (1) is loaded so much that it hangs slightly overweight on the floating vehicles. In this state, the tunnel part (1) is pushed forward in the tunnel axis and hung between the provisional yokes (4). Before that, the river bed (3) was dredged away under water.

In picture 2 the dam (2) is closed again and let flourished on the upper part of the tunnel (1). Then the tunnel part (5) is made and firmly connected to part (l) at the joint (6). The construction pit is flooded again and parts (1) and (5) are pushed forward again in the direction of the underwater Timneluchse. Both parts of the tunnel are slightly overweight so that they float under water. You will be after

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Fig. 3 between never provisional yokes (?) Retracted, and eiii ^ .long. Remains between the luiterkante tunnel and the river bed the l: aüm (δ) free. Ei * does not need to be filled in later, because an entire tunnel should be subjected to buoyancy. It Fourth is laid on the fact that the water comes everywhere at the tunnel tube Jri er. . ■

The tunnel part (9) can then be finished. The process is repeated until the tunnel is moved from one point to the other according to i; ild h and is placed on the final supports (10) and (ii); There it must be anchored against both negative and positive bearing pressures. The drive has a relieving effect. The dam (1.2) seals off the tunnel part (13) tightly. The tunnel part (14) is covered by the pool material (Ϊ5).

Xrn iiild 5 a possible ^ uex-schhi Lt is shown.

Shall use a submerged cavity as a support system are used, this can be done according to Figure 6.

The Bohlröum-iionstruktioh can consist of one or more biegüngssteiien Lohren (16), which could also be partially inflated with compressed air to increase the rigidity. The same are anchored in the ground by the ropes (-17-) where the concrete blocks (i &) represent the oe ^ ngvicht .. The pipe (16) is ii: - a usable depth below the water level (21). On the I; earrings, sitting, the pillars ^(19), derexi load is less than .auftrieb of eggs, Kohr.es (16). Above the pillar (19) there is a truss, e.g. B. a bridge (20).

By the Ausjiiii.zun ;, of the buoyancy it is possible ^ under water to bridge much larger spans than with a normal bridge is the case. It is known that the conventional Bridge constructions over water the own weight makes up the largest proportion of the burden. The traffic loads are represented low in percentage terms of the scunt load. this applies particularly to large bridge spans.

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Claims (1)

Patent claims 1β) method of manufacture; an underwater tunnel or an Untorwasserbrücke from individual parts, which are made on the bank in an open excavation and then fm the end; Ul ii ge installation site are flooded, characterized in that after flooded excavation, the individual tunnel sections under water with partial use of the buoyancy and using floating vehicles or a fixed track under "water, and after creating a tight seal on the moved tunnel section, additional sections are concreted in an open excavation pit. 2o) Method of making an "underwater tunnel or oiner Underwater bridge after. Claim 1.) characterized in that that the dead weight of the tunnel is only laid out so grumpy, that the buoyancy cancels the same and, if necessary, still takes over part of the traffic load. 3.) Procedure for the marriage of an underwater tunnel or one I'ntervvasserbrücke according to claim 1.) and -2.) Characterized in that that the same as a support for one but the water level horizontal supporting structure or bridge can be used can, whereby the buoyancy takes over the loads. 009845/0526 ORIGINAL