EP1057939B1 - Device for flowing bodies of water - Google Patents

Description

The invention relates to a device for flowing water with changing salinity or Suspended matter concentrations in tidal conditions Brackish water zones, with a side branch or Extension in the manner of a lock access or a harbor basin, to avoid silt / sand deposits, being in the area of the beginning of the Branch or extension related to a flood current over a distance from the bank boundary Deflection partition forms a channel, the Cross-sectional area a small part of the entrance cross-sectional area the junction or extension and its inlet opening in the river area in the area of the beginning and its outlet opening in the area of the branch or extension lie.

There are side branches or extensions this kind of problem that about the biggest Time span during a tide of salinity or the suspended matter concentration in the watercourse is higher than in the water body of the side branch or Are extension and thus a density compensation current from the river to the junction or extension arises, which mainly acts near the bottom and thereby carries with it large amounts of silt or sand in a known manner to high sediment deposits to lead. Through the sediment deposits formed there are high maintenance costs for dredging and the placement of the dredged material.

The density of a tidal river can both through changes in salinity as well vary due to changes in the suspended matter content. Salinity changes in that at high tide highly saline seawater continues into a tidal river can penetrate and towards the sea at low tide is held back. Levels of suspended matter change at high and low tide due to different distances Penetration of the so-called turbidity zone or through zuund Decrease in turbulent tidal currents. All these Effects are caused by the tide.

Since increases in salinity and also the Suspended matter levels in the river reached much faster are as in side branches or Extensions, it comes about in the longest period of time Course of a tide to those described Differences in density, with the result that Form density equalization flows through the large Amounts of sand or silt in the side Branches are entered.

According to DE 37 07 074 C1, it is already known at flowing water Roll flows through diverting partitions to avoid at port entrances and thus the lenticular otherwise caused by it To reduce sediment deposition. These trainings but are not suitable to the above problems solve, since this arrangement alone is the Reduction of flow-related roll formation.

Experiments have also been carried out, density compensation flows through bubble curtain or on To prevent floating bodies from attached underwater aprons in order to drive in a silt or sand prevent. Both methods have proven unsuitable exposed.

According to the invention, this object is achieved by that the deflection partition covered in the upper area is arranged to the water depth and in the lower Area related to the water depth in the river area there is an additional baffle for distraction a dense stream close to the bottom towards the middle of the river starting from the bank boundary in the area of Deflection partition runs and into the river area protrudes.

This makes a simple deflection and filling flow control system created, the in the lower part of the body of water at the beginning of the fork or extension through the baffle near the bottom Density current to the flowing water is derived. in the upper part of the water area is used as a filling flow control system formed a channel with the bank boundary, above the amount of water to fill the tide Flowing in branch or extension and one Counterflow for penetrating density compensation flow forms and thus the entry from near mud or sand drift carried along the sole prevented in the side branch or extension.

Cheap training, especially for influencing ebb current is created in that in the area of the deflecting partition opposite the end of the junction or expansion based on the bank boundary in the river area towards the middle of the river facing baffle at least in the lower area is arranged to the water depth.

To prevent eddy formation behind the deflection walls, it is suggested that a range between Deflection wall and bank boundary filled with material is.

This is to improve a streamlined Training provided that a boundary edge of the area of the deflection wall filled with material is rounded off is.

it is also proposed that the diverting partition at least in the area outside of the one filled with material Area is arranged on stands.

A favorable training is created in that each baffle for vortex-free deflection S-shaped is trained.

It is also proposed that the areas of the deflection partition and the baffle partially overlap.

It is also provided that the in the area of Deflection partition opposite end of the junction or extension lying bank tip is cut off to prevent flow.

Fig. 1

eine Prinzipdarstellung einer Vorrichtung mit Wirkung bei Flutstrom,

Fig. 2

eine Prinzipdarstellung einer Vorrichtung mit Wirkung bei Ebbstrom mit Ablenkwänden beidseitig einer Abzweigung,

Fig. 3

eine Ausbildung gemäß Fig. 1 als Ausschnitt mit Verfüllung und ausgerundeter Uferkante und abgerundeter Begrenzungskante des Verfüllbereiches,

Fig. 4

eine Schnittdarstellung gemäß Linie IV-IV der Fig. 3 in vergrößerter Darstellung,

Fig. 5

eine Schnittdarstellung gemäß Linie V-V der Fig. 3 in vergrößerter Darstellung mit teilweise aufgeständertem Füllstromleitsystem und abgerunderter Kante am Ende des Füllbereiches hinter dem Ablenksystem und

Fig. 6

eine Ausbildung einer seitlichen Erweiterung mit strömungsgünstiger Form von Uferspitze und verfüllbereich an dem ebbseitigen Ende der Abzweigung.

Exemplary embodiments of the invention are shown schematically in the drawings. Show it:

Fig. 1

a schematic diagram of a device with effect at flood current,

Fig. 2

1 shows a schematic diagram of a device with effect at low tide with deflection walls on both sides of a branch,

Fig. 3

1 as a detail with backfilling and rounded bank edge and rounded boundary edge of the backfill area,

Fig. 4

3 shows an enlarged sectional view along line IV-IV of FIG. 3,

Fig. 5

a sectional view according to line VV of Fig. 3 in an enlarged view with partially raised fill flow control system and rounded edge at the end of the filling area behind the deflection system and

Fig. 6

a formation of a lateral extension with a streamlined shape of the bank tip and filling area at the low-side end of the junction.

In the arrangements shown is a river 1 as Rivers shown from which a port basin 2 branches. The river 1 has the tidal current 4 at high tide and additionally through the penetrating sea water Density flow 3 in the area near the bottom. At low tide the arrows indicate the backward tide 19 and Density flow 18. Furthermore, the arrows Density equalization flows at high tide according to arrows 17 and shown at low tide according to arrows 22, which then always act when the salinity or suspended matter in the Water in river 1 is larger than in port basin 2.

In the area of the start 20 of the junction 2 is a Filling flow control system with a diverting partition 6 in upper area and a baffle 5 in the lower area shown. With the bank boundary 23 with the deflection partition 6 a channel 24 in the upper region which forms water depth. Through this channel 24 with the Inlet opening 8 in the river area 1 and the outlet opening 9 in the transition area between river 1 and harbor basin 2 at high tide a quantity of water with flow direction 7 guided. This amount of water is divided into the tidal volume 11 for the port basin 2 and a backflow portion 10 which flows back into the river area 1 and one Density compensation flow 17 back into the flowing water 1 pushed away.

In area 20 is in the lower part of the Water depth a baffle 5 arranged behind the up to the bank boundary 23 a space 13 up to an approximately vertical end wall 26 with material, such as. Sand with stone cover, is filled up. The starting at the bank boundary 23 and in the river area 1 curved in the area of the beginning 20 of the junction 2 shaped baffle 5 urges the tide near-dense stream 4 according to the arrows 12 of the Port entrance 2 from.

The density flow 12 thus rejected in connection with the partial outflow 10 cause a density compensation flow 17 at high tide as far from the port entrance 2 is pushed so that it remains in the river area 1. Through this repression, the otherwise of the Density compensation flow in the area of the river bed carried entry of sand and silt and the resulting resulting high sedimentation in the harbor basin 2 prevented.

At the end of junction 2 is beginning at the bank boundary 25 shows a baffle 14, which in arranged lower area of the water depth and in the curved Course led into the river area 1 is. The area 15 between the baffle 14 and the bank boundary 25 is like the area 13 with material up to vertical termination 16 filled.

The baffle 14 should during the ebb phase with the Tide flow 19 and density flow 18 these Deflect density flow 18 according to arrows 27, that in combination with an outflow 28 from the port basin 2 penetration of a density compensation flow 22 is prevented and in this way also at Low tide otherwise entry of silt or sand in the harbor basin 2 is prevented.

As a material for the manufacture of the deflection systems are for example steel, reinforced concrete or wood.

The end wall 26 of the filling area 13 for the Deflection wall 5 is in an aerodynamically rounded shape 29 performed.

In Figure 6, a streamlined variant of a bank tip 21 in connection with the baffle 14 and one aerodynamically arranged end wall 16 a Backfill area 15 and also a streamlined clipped bank tip 21 'shown that together with flood current, the outflow of a partial flow 10 improve.

The deflection partition 6 is in the embodiment 5 outside the backfill 13 of the baffle 5 arranged on stilts as a stand 30.

Claims (8)

1. Device for flowing watercourses with changing salt contents or concentrations of suspended matter in tide-induced brackish water zones, the said device having a lateral branch or enlargement, in the manner of a lock approach or harbour basin, for preventing deposits of silt/sand, wherein there is formed, in the region of the beginning of the branch or enlargement, referred to a flood-tide current, and via a deflecting partition wall disposed at a distance from the bank boundary, a channel whose cross-sectional area amounts to a small portion of the inlet cross-sectional area of the branch or enlargement and whose inlet opening in the river region lies in the region of the beginning of the branch or enlargement and whose outlet opening lies in the region of the said branch or enlargement, characterised in that the deflecting partition wall (6) is disposed in the upper region, referred to the depth of the water, and in the lower region, referred to the depth of the water, there is located in the river region an additional diverting wall (5) which, for the purpose of diverting a density current near the bottom, extends in the direction towards the middle of the river, starting from the bank boundary (23), in the region of the deflecting partition wall (6) and projects into the river region (1).
2. Device according to claim 1, characterised in that a diverting wall (14) pointing in the direction towards the middle of the river is disposed, at least in the lower region, referred to the depth of the water, in the region (21) of that end of the branch or enlargement (2) that lies opposite the deflecting partition wall (6), starting from the bank boundary (25).
3. Device according to claim 1 or 2, characterised in that a region (13, 15) between the diverting wall (5, 14) and the bank boundary (23, 25) is backfilled with material.
4. Device according to claim 3, characterised in that a boundary edge (16, 26) of that region (13, 15) of the diverting wall (5, 14) which is backfilled with material is rounded off at the top.
5. Device according to one of claims 1 to 4, characterised in that the deflecting partition wall (6) is disposed above columns (30), at least in the region outside the region (13) which is backfilled with material.
6. Device according to one of claims 1 to 5, characterised in that each diverting wall (5, 14) is of S-shaped construction in order to effect diversion in an eddy-free manner.
7. Device according to one of claims 1 to 6, characterised in that the regions of the deflecting partition wall (6) partially overlap with the diverting wall (5).
8. Device according to one of claims 1 to 7, characterised in that that bank point (21') which lies in the region (21) of that end of the branch or enlargement (2) which lies opposite the deflecting partition wall (6) is cut off in a flow-repelling manner.

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