DE4025355A1 - Construction of piers for bridge spanning river - by forming concrete foundation inside double walled shuttering - Google Patents

Abstract

The piers supporting a bridge which spans a river are constructed in the following way. Oversize screws, arranged in a row at right angles to the direction of the flow of the river, are screwed into the river bed. These screws extend to a height above the water which is less than the height of the undersurface of the intended bridge. The pier foundation is then formed by means of double walled shuttering which is floated to the required position. The shuttering is then sunk to the river bed by filling the space between inner and outer walls with material excavated from the riverbed. The inner space is then filled with concrete to form the pier foundation. After the concrete has hardened, the pier is erected on the foundation. USE - Bridge building.

Description

The invention relates to a method with a device for building Bridge piers in rivers.

Bridges must be built over rivers, today and in Zu coming. Existing bridges have to be renovated, which leads to the sluggish construction of bridge piers under renovation Can lead to bridges or to the temporary erection of Be helfs bridge pillars for the time of renovation. That requires plenty of time for pre-planning and preparation, as every Flgege water and each bridge together represent an individual problem that cannot be solved schematically to this day.

A schematic quick solution would suddenly be needed agile renovation work very beneficial and could shorten the time of the renovation or the bridge construction.

Unfortunately, there is still no scheme for the construction of bridge pillars Learn in rivers, because the rivers have to be preserved On the other hand, rivers are unpredictable. A cloud break upstream can be a calm stream into a torrent and transform electricity that can hardly be tamed, in a very short time Time. This can press bridge builders and put them in need.

It is therefore an object of the invention, a method with Vorrich to show which bridge pillar schematically for almost every river is planned, prepared and quickly into the Rivers can be built.

The object is achieved by the features of claim 1 solved.

Below the (future) bridge pier and the Bridge, seen downstream, become one or more rows oversized screws like drill pipes in the river bottom drilled or screwed to the bottom, so deep that with certainty despite of all currents they will always be fixed, e.g. B. 20 m deep. they protrude a little from the river bed and excavation is carried out in front of them heaped up on the river and thereby the river a little dammed up. This happens up to such a height that a double formwork in like a ship can be launched into the water from the shore and can be floated on the water to the place  which of the bridge pillars should stand. The double formwork is for floating. Is the double formwork at the location of the future fixed to the bridge pier, so excavation from the river is between the outer wall of the double formwork and its inner wall poured dung. Previously, a was in the river bed at this point Excavated in which the formwork is now by Ge weight of the filled river excavation in the outer cavity ver sinks to the edge of the water level. Now the filling measure material for the foundation of the bridge pier on the water moved up and the inner cavity of the double formwork filled as a future foundation.

But this foundation has cutouts or holes, which for the screwing in of oversized screws that serve be screwed in after the foundation has hardened and that Fix the foundation immovably on the place. From the foundation the reinforcement protrudes for the construction of the bridge pier. This ar The oversized screws can also be used for lubrication be removed by moving them far enough from the foundation protrudes.

The row of oversized screws that block the water is now screwed into the riverbed to such a depth that A level compensation takes place in the area of the bridge in such a way that the below the bridge between the bridge piers Flow speed of the water at least at the bottom of the river is heavily braked.

The floating formwork is made from standardized parts Seals assembled watertight on land and after curing of the foundation over the river bed on the sides of the foundation dismantled again for reuse.

The oversized screws are hollow and become after the one screws filled with concrete. As far as this about the foundation ins If they protrude freely, these protruding parts are unscrewed or otherwise removed.

Bridge piers can now be built in no time.

Claims (5)

1. The method and device for the construction of bridge piers in flowing waters, characterized in that
underneath, with distance from the (future) river bridging, oversized screws are screwed into the river bed in one or more rows transversely to the direction of flow of the river and with excavation in front of and in between they protrude over the river bed and build up the river,
the foundation for the bridge pillar is let into the water as a floating, double-walled formwork from the bank within the deep-water zone that has been created and is floated to the location of the future bridge pillar
and the cavity between the outer and inner walls of the double-walled formwork is filled with excavation from the river bed and filled with the river bed excavation sinks into the prepared river depression,
Then the inner cavity within the inner formwork wall is filled with the material (concrete) of the future foundation and oversized screws are screwed into the left recesses (holes) of the foundation after the foundation has hardened is built with the reinforcements protruding from the foundation,
afterwards the water, together with the excavation, is screwed into the river bed by means of dimensional screws up to the height of the river bed above the bridge piers in the manner of level compensation. 2. The method and device according to claim 1, characterized net that the floating formwork made of standardized parts with seals is composed and above the river bed after curing the foundation is dismantled again. 3. The method and device according to claim 1 and 2, characterized ge indicates that the oversized screws for screwing the Fun dameses in the river bottom are hollow and are poured out with z. B. Concrete.   4. The method and device according to claim 1 to 3, characterized in that
the oversized screws extend through the foundation into the underground of the river bed and protrude above the foundation instead of reinforcements, the bridge piers support from the inside. 5. The method and device according to claim 1-4, characterized records that the one reaching over the foundation outside the bridge pillars Part of the oversize that holds the foundation on the ground len screws can be removed or unscrewed.