CN207193884U - A kind of bottom permeable isolated niche for ship lock entrance area at approach channel - Google Patents

Abstract

The utility model discloses a kind of bottom permeable isolated niche for ship lock entrance area at approach channel.Wherein, including the pier of multiple arrangements and the plate that is set between adjacent pier；Ship lock downstream core wall is provided between the bottom permeable isolated niche end and sluice gate；The pier includes the pier stud set on cushion cap and the cushion cap；The two sides being connected between the pier stud set vertical slot；The plate is plugged in the side vertical slot of adjacent pier stud；Described pier crest level is more than flood period power plant tail water position.The utility model has improvement entrance area at approach channel flow condition, ensures the safety of ship's navigation, is easy to the effect of site operation and installation maintenance.

Description

A bottom permeable dike for the gate area of the approach channel under the ship lock

technical field

The utility model belongs to the field of waterway buildings, in particular to a bottom permeable flow barrier embankment used for the gate area of the approach channel under the ship lock.

Background technique

The gate area of the ship lock is the link between the ship lock and the river channel. It is the transition area between the still water in the approach channel of the ship lock and the moving water outside the approach channel of the pivotal river section. The flow velocity, longitudinal flow velocity and return flow velocity do not meet the navigable water flow standards and the ship's navigation water depth is insufficient. The water flow conditions in the entrance area determine whether the ship can enter and exit the lock smoothly and safely. Therefore, it is an important technical issue in the construction of ship locks to improve the water flow conditions at the entrance of the approach channel.

The improvement of water flow conditions in the entrance area often requires the construction of various auxiliary navigation structures. At present, there are more researches on diversion piers, navigation walls and water barriers. In the dry season, only a few generating units are used to generate power, and all the sluice gates are closed. The water depth of the lower gate sill of the ship lock located in the left branch navigation channel under the design flow rate is much lower than the minimum requirement; the channel at the gate of the approach channel under the ship lock is curved. And with the increase of the flow rate, the water discharged from the power station is divided into two streams, the left and right streams, and the proportion of the diversion into the left branch gradually increases. In addition, the diversion embankment downstream of the ship lock is short, which cannot prevent the main flow from crossing the entrance area obliquely. Influenced by the higher side beach, the flow velocity in the entrance area gradually increases, and it is more difficult for ships to enter and leave the entrance of the approach channel. In order to reduce the cross flow in the approach channel and the gate area, it is necessary to arrange navigation structures on the right side of the channel. The diversion pier forms strong backflow, vortex and other undesirable flow patterns near the inner side of the channel, which is not conducive to the safe navigation of the ship. The navigation wall is easy to form a strong water flow around the column in the hollow section, and the water barrier changes the mainstream direction, which is not conducive to the ship lock. Next sailing request.

Utility model content

In view of the above problems, the purpose of this utility model is to provide a bottom permeable dike that improves the water flow conditions at the entrance of the approach channel, ensures the safety of the ship's navigation, and facilitates on-site construction, installation and maintenance.

In order to achieve the above purpose, the utility model provides a bottom permeable barrier embankment for the gate area of the approach channel under the ship lock. Among them, it includes a plurality of arranged pier abutments and inserting plates arranged between adjacent abutments; the end of the bottom permeable dike and the sluice is provided with a bulkhead downstream of the ship lock;

The abutment includes a cap and a pier column arranged on the abutment; vertical grooves are arranged on both sides connected between the pier columns; the inserting plate is inserted into the side vertical groove of the adjacent pier column;

The elevation of the abutment top is greater than the tailwater level of the hydropower station during the flood period.

Further, at least one inserting plate is arranged between adjacent piers; the top heights of the piers and inserting plates are set to the same value.

As a preference, the length of the cap is 12.5m, the width is 2.5m, the length of the pier column is 11.5m, the width is 2.5m, the length of a single-section insert is 9m, the height is 2.3m, and the thickness is 0.5m. change with change.

The beneficial effect of the utility model is to improve the water flow conditions in the entrance area of the approach channel, ensure the safety of the ship's navigation, and reduce the weight of some components. It provides convenience and engineering efficiency, and also facilitates subsequent maintenance and disassembly. Due to the design of the permeable dike at the bottom, the flow distribution in the left branch channel under the medium flood flow is adjusted, and the lateral flow velocity and the included angle of the water flow in the entrance area are weakened.

The technical problems of excessive cross flow at the gate area of the approach channel under the ship lock and adjusting the distribution of left and right branch water in dry season and flood season are solved. Specifically, through the bottom-permeable dike, the originally relatively concentrated water flow is evenly dispersed during the dry season, part of the water flow passes through the navigation frame and enters the approach channel, and part of the water flow descends through the entrance area and enters the channel. Small, the lateral flow velocity does not exceed the standard of navigable water flow. With the increase of the flow rate, the dike plate plays the function of blocking the flow, reducing the backwater value during the flood period, and the flow entering the entrance area of the approach channel through the dike is greatly reduced compared with that before the project, which weakens the oblique crossing of the main flow. The excessive lateral flow velocity generated in the area can improve the navigable water flow conditions in the entrance area. Compared with the existing technology, the permeable dike at the bottom is more suitable for improving the lack of water depth in the dry season and the large cross flow in the entrance area during the middle flood period. In this way, the influence of the discharge of the sluice on the water flow conditions in the entrance area is weakened.

Description of drawings

Fig. 1 is the structural top view of the utility model;

Fig. 2 is a structural side view of the utility model;

Figure 3 is a schematic diagram of the implementation.

The specific embodiment includes a plurality of arranged abutments and inserting plates arranged between adjacent abutments; the end of the bottom permeable dike and the sluice is provided with a water barrier downstream of the ship lock;

The elevation of the abutment top is greater than the tailwater level of the hydropower station during the flood period.

Below in conjunction with accompanying drawing, utility model is described in further detail.

As shown in Figure 1-3, a bottom permeable barrier dike used in the gate area of the approach channel under the ship lock. Wherein, it includes a plurality of arranged piers 01 and inserting plates 02 arranged between adjacent piers 01 and having the same top height as the piers 01 . The abutment 01 includes a cap 011 and a pier column 012 provided on the abutment 011, vertical grooves 013 are arranged on both sides connected between the pier columns 012, and at least one inserting plate 02 is vertically superimposed and inserted into the adjacent pier In the side vertical groove 013 of the column 012, the top elevation of the abutment 01 is higher than the tailwater level of the power station during the flood period, so as to prevent the cross flow that is not conducive to the navigation of ships due to the overcurrent at the top of the embankment. The abutment 01 includes the cap 011 and the pier column 012 provided on the abutment 011, the vertical grooves 013 are arranged on the two sides connected between the pier columns 012, and the inserting plate 02 is inserted into the side vertical groove 013 of the adjacent pier column 012 , Cap 011 has a length of 12.5m and a width of 2.5m, a pier column 012 has a length of 11.5m and a width of 2.5m, and a single-section insert plate 02 has a length of 9m, a height of 2.3m and a thickness of 0.5m. It is easy to install and greatly improves the efficiency of construction projects.

At least one board 02 is arranged between adjacent piers 012, and the size and quantity of boards 02 can be determined according to actual conditions. Setting the top height of the pier column 012 and the inserting plate 02 to the same value is also to prevent cross flow caused by overcurrent at the top of the embankment. This application solves the technical problems of excessive cross flow at the gate area of the approach channel under the ship lock 11 and adjusting the distribution of left and right branch water flow in dry season and flood season. During the dry season, the water discharged from the power station flows out of the tailrace channel and travels to the left side of the river. The right bank has a slight overflow. Under the action of adjustment, it is evenly dispersed, part of the water flow passes through the navigation frame and enters the approach channel, and part of the water flow goes down through the entrance area and enters the channel. With the increase of the flow rate, the plugboard 02 plays the role of blocking the flow, and the flow rate entering the entrance area of the approach channel through the permeable flow separation dike is greatly reduced compared with that before the project, the flow velocity in the entrance area is reduced, and the water flow conditions in the entrance area are improved. Significant improvement, water flow conditions basically meet the specification requirements.

During implementation, the main buildings of the shipping hub include ship locks 11, power plant buildings 12, switching stations, sluice gates 13 and barrages. The maximum discharge of designed flood is 20300m3/s, and the maximum discharge of checked flood is 26300m3/s. The ship lock adopts a first-class ship lock, and the effective size of the ship lock chamber is 130m x 12m x 2.5m (lock chamber length x width x water depth above the sill). Ship lock 11 has a design flow rate of 265m3/s and a water level at the head of the lower lock of 62.99m; a maximum navigable flow of 3000m3/s and a water level of the head of the lower lock 66.26m; the maximum water head of the power station is 24m, the minimum water head is 7m, and the design water head is 7.5m. The sluice gate is arranged on the main riverbed, with 15 holes in total, and the net width of the sluice holes is 9m.

What have been described above are only some embodiments of the present utility model. For those skilled in the art, on the premise of not departing from the inventive concept of the utility model, some improvements can be made, which all belong to the protection scope of the utility model.

Claims (3)

1. A bottom permeable type barrier embankment for the gate area of the approach channel under the ship lock, characterized in that it comprises a plurality of arranged abutments and inserting plates arranged between adjacent abutments; the bottom permeable type barrier embankment Between the end of the embankment and the sluice, there is a water barrier downstream of the ship lock; the pier platform includes a cap and a pier column set on the cap; vertical grooves are arranged on the two sides connected between the pier columns; the inserting plate Inserted into the side vertical groove of the adjacent pier column; The elevation of the abutment top is greater than the tailwater level of the hydropower station during the flood period. 2. A bottom permeable barrier embankment for the gate area of the approach channel under the ship lock according to claim 1, wherein at least one inserting plate is arranged between adjacent abutments; The top heights of the pier abutments and inserting boards are set to the same value. 3. A bottom permeable flow separation embankment for the gate area of the approach channel under the ship lock according to claim 1 or 2, characterized in that, the length of the cap is 12.5m and the width is 2.5m; the pier The length of the column is 11.5m, the width is 2.5m, and the length of the insert plate is 9m, the height is 2.3m, and the thickness is 0.5m.