CN205369181U - Ditch water treatment drainage hole structure - Google Patents

Abstract

The utility model relates to a drainage hole structure for ditch water treatment, in particular to a drainage hole structure for ditch water treatment used in the field of water treatment in tributaries, valleys, and valleys in alpine and canyon regions. The utility model provides a ditch water treatment drainage hole structure with high reliability and convenient maintenance for facilities. Including the main drainage hole, the diversion hole and the energy dissipation structure of the swirl shaft, as well as the high water outlet and the low water outlet. It includes a main drainage hole, a diversion hole and a swirl shaft energy dissipation structure, the swirl shaft energy dissipation structure communicates with the main drainage hole, the diversion hole communicates with the main drainage hole, and the connection between the diversion hole and the main drainage hole is located at The upstream side of the energy dissipation structure of the swirl shaft also includes a high water outlet and a low water outlet, and the high water outlet is arranged at the outlet of the diversion hole. The water outlet of the diversion tunnel set up in this application meets the ditch water diversion and drainage during the dry season, avoiding the swirl shaft energy dissipation structure as the only drainage channel for a long time, and reducing the engineering risk.

Description

Ditch Water Treatment Drainage Tunnel Structure

technical field

The utility model relates to a ditch water treatment drainage tunnel structure, in particular to a ditch water treatment drainage tunnel structure applied in the field of tributary ditch water treatment in alpine and canyon areas.

Background technique

When building a hydropower station project in an alpine and valley area, there are very few construction sites near the dam, and a large amount of spoil needs to be stockpiled in the project construction, and temporary construction facilities such as various construction factories need to be arranged. Therefore, dams are often used The tributary valley on the upstream side of the site is used as a spoil ground, and the valley needs to be treated with ditch water. Most of the ditch water treatment methods use retaining dams + drainage tunnels.

At present, when the drainage tunnel has been arranged according to the maximum longitudinal slope that meets the construction requirements, and the elevation difference between the outlet of the drainage tunnel and the downstream river is still large, in order to ensure the safety of the outlet, step energy dissipation facilities are often installed at the outlet. However, the construction of the drainage tunnel adopting the above layout scheme is very difficult, and the protection works of the water outlet are large and need to be repaired many times during the operation. In addition, the operation of the drainage tunnel will cause great safety hazards to the roads and bridges near (or below) the water outlet, temporary construction facilities and production personnel.

The utility model with the patent number "ZL201420531983.7 is equipped with high and low water outlets in the upstream of the dam. The low water outlets meet the ditch water diversion and drainage during the construction period of the project, and solve the problem that the outlet steps of conventional drainage tunnels are often washed away. Potential safety hazards caused by roads and bridges, temporary construction facilities, and production personnel. Setting up high water outlets solves the requirements for ditch water diversion and drainage and water energy utilization in the permanent period of the project after the reservoir is impounded. However, the actual project may encounter drainage The outlet of the hole is downstream of the reservoir, and the drainage hole runs for a long time. At this time, if the utility model structure of the patent number "ZL201420531983.7 is still adopted, the following disadvantages exist:

1. The energy dissipation structure of the swirl shaft is used as a drainage channel, and the operation time will be long and the operation is not flexible. Once damaged, it will cause huge economic losses and impact.

2. Entrained mass in mountainous rivers, the energy dissipation structure of the swirl shaft will be damaged by erosion, aeration, and cavitation erosion at high flow rates; when the flow rate is small, the water will directly fall into the energy dissipation well, so it is not suitable for large The range of flow varies, and long-term drainage will inevitably cause damage to the structure.

3. It is impossible to carry out regular inspection and repair on the energy dissipation structure of the shaft.

Utility model content

The technical problem to be solved by the utility model is to provide a flow rate with high reliability, which can adapt to a wide range of changes, can run for a long time across the flood season and dry season, and can effectively avoid the damage to the structure caused by drainage during the long-term operation, which is convenient for Facility for maintenance of ditch water treatment drainage tunnel structure.

In order to solve the above-mentioned technical problems, the water treatment drainage hole structure adopted by the utility model includes a main drainage hole, a diversion hole and a swirl shaft energy dissipation structure, the swirl shaft energy dissipation structure is connected with the main drainage hole, and the diversion hole communicated with the main drainage hole,

And the connection between the diversion hole and the main drainage hole is located on the upstream side of the energy dissipation structure of the swirl shaft, and also includes a high water outlet and a low water outlet, the high water outlet is arranged at the outlet of the diversion hole, and the low water outlet It is connected with the outlet of the energy dissipation structure of the swirl shaft.

The horizontal distance between the connection between the diversion tunnel and the main drainage tunnel and the connection between the swirl shaft energy dissipation structure and the main drainage tunnel is 20-40m.

Further, the diversion tunnel is a construction branch tunnel.

Further, the slope ratio of the diversion hole is 0.

Further, it also includes a lock chamber structure, and the lock chamber structure is located at the outlet end of the diversion hole.

Further, a middle partition wall is arranged in the middle of the bottom plate of the main drainage hole.

Further, the partition wall starts at the entrance of the main drainage hole, and the end of the partition wall is connected with the side wall of the diversion hole near the main drainage hole.

Further, the width of the intermediate partition wall ranges from 0.8m to 1.5m.

The beneficial effect of the utility model is that: the water outlet of the diversion hole set by the application satisfies ditch water diversion and drainage during the dry season, and avoids the potential safety hazard caused by the swirl shaft energy dissipation structure being used as the only drainage channel for a long time, thereby reducing Engineering risks; high and low water outlets can be flexibly arranged according to geological conditions, and the layout is more flexible; maintenance can be carried out every year in the dry season, which is safer and more reliable; through the control of the sluice chamber, the water outflow can be adjusted according to the incoming flow The position and method of flow can avoid the impact damage to the construction site, facilities, roads, etc. existing in the lower part of the mountain when the flow is large in the dry season, and the use is more flexible; the construction branch hole of the main drainage hole can be used as a diversion hole, saving engineering investment , so as to achieve the purpose of "one hole for multiple purposes", save engineering investment, and facilitate construction.

Description of drawings

Fig. 1 is the plane layout of ditch water treatment drainage tunnel;

Figure 2 is a cross-sectional view of the main drain hole;

Fig. 3 is a longitudinal sectional view of the main drainage tunnel;

Parts, parts and numbers in the figure: main drainage hole 1, diversion hole 2, swirl shaft energy dissipation structure 3, high water outlet 4, low water outlet 5, middle partition wall 6, horizontal distance h, width b, natural Valley channel 7, reservoir dam downstream channel 8, proposed construction road 9.

detailed description

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

As shown in Fig. 1, Fig. 2 and Fig. 3, in order to solve the above-mentioned technical problems, the ditch water treatment drainage hole structure adopted by the utility model includes a main drainage hole 1, a diversion hole 2 and a swirl shaft energy dissipation structure 3, the Swirl shaft energy dissipation structure 3 and main drainage hole

1, the diversion hole 2 communicates with the main drainage hole 1, and the connection between the diversion hole 2 and the main drainage hole 1 is located on the upstream side of the swirl shaft energy dissipation structure 3, and also includes a high water outlet 4 and a low water outlet 5. The high water outlet 4 is arranged at the exit of the diversion hole 2, and the low water outlet 5 communicates with the outlet of the swirl shaft energy dissipation structure 3. On the upstream side of the energy dissipation structure 3 of the swirling flow shaft, a diversion hole 2 communicating with the main drainage hole 1 is added. In this way, the energy-dissipating structure 3 of the swirl shaft is drained in the flood season, and the drain can be drained through the diversion hole 2 in the dry season.

The low water outlet 5 set in the ditch water treatment drainage tunnel in the prior art satisfies the ditch water diversion and drainage in the flood season, and the low outlet 5 solves the problem of the steep slope at the outlet of the conventional drainage tunnel, but the step protection project in the prior art is difficult to construct , and is often washed away, causing safety hazards to roads, bridges, temporary construction facilities and production personnel near or below the water outlet; and the diversion hole 2 added by this application can meet the drainage of ditch water during the dry season, avoiding swirl The safety hazards brought by the vertical shaft energy dissipation structure 3 as the only drainage channel for a long time, thereby reducing the engineering risk; the high water outlet 4 and the low water outlet 5 can be flexibly arranged according to the geological conditions, and the layout is more flexible; at the same time It avoids that when the flow rate is small, the water flow directly falls into the energy dissipation well, causing damage to it; When the flow rate is high, damages such as scour, aeration, and cavitation erosion occur; therefore, the drainage hole structure of the application can adapt to a wide range of flow changes, and the structure will not be damaged even if it is drained for a long time.

The horizontal distance h between the connection of the diversion tunnel 2 and the main drainage tunnel 1 and the connection of the swirl shaft energy dissipation structure 3 and the main drainage tunnel 1 is 20-40m. By adopting the aforementioned distance range, the arrangement of drainage holes may be more reasonable.

The diversion tunnel 2 is a construction branch tunnel. The construction branch hole of the main drainage hole 1 can be used for the diversion hole 2, which saves engineering investment, thereby achieving the purpose of "one hole with multiple uses", saving engineering investment, and convenient construction. The slope ratio of the split hole 2 is 0.

It also includes a lock chamber structure, which is located at the outlet end of the diversion hole 2 . When the flow is large in the dry season, the gate of the sluice structure can be closed to allow the water to flow from the main drainage hole 1 through the swirl shaft energy dissipation structure 3, and then be discharged from the outlet of the low drainage hole to avoid possible adverse effects such as impact damage. Through the control of the sluice chamber, the position and mode of water flow can be adjusted according to the size of the incoming flow, which can avoid the impact damage to the construction site, facilities, roads, etc. existing in the lower part of the mountain when the incoming flow is large in the dry season, and the use is more flexible.

A middle partition wall 6 is arranged at the middle position of the bottom plate of the main drainage hole 1 . During the dry season, when the water flow rate is small, the maintenance personnel can carry out maintenance of the main drainage tunnel 1 and the energy dissipation structure 3 of the swirl shaft along the side channel of the septum by stacking and repairing the water retaining cofferdam at the inlet end of the main drainage tunnel 1. Overhaul: In the same way, the other side channel of the middle partition wall 6 can be overhauled.

The middle partition wall 6 starts at the entrance of the main drainage hole 1, and the end of the middle partition wall 6 is connected with the side wall of the diversion hole 2 near the side of the main drainage hole 1.

The width b of the middle partition wall 6 ranges from 0.8m to 1.5m. The aforementioned range of width b can be used during specific implementation, so that the middle partition wall 6 is convenient for construction and plays an effective barrier role during maintenance.

Project example: There are natural valleys in the dam site of a large-scale hydropower station, and the ditch water needs to be treated. The combined structure of retaining dam + drainage tunnel is designed, and the drainage tunnel needs to be in operation for at least 8 years. The layout structure of the drainage tunnel includes the main drainage tunnel 1, the swirl shaft energy dissipation structure 3 and the diversion tunnel 2. The outlet of the main drainage tunnel 1 includes the outlet of the diversion tunnel 2 and the outlet of the low drainage tunnel, and its inlet end is connected with the natural valley channel 7 The energy dissipation structure 3 of the swirl shaft is arranged at the end of the main drainage tunnel 1, and the rock condition is better and relatively complete; the inlet end of the diversion hole 2 is arranged on the upstream side of the water inlet section of the energy dissipation structure 3 of the swirl shaft, It is connected with the main drainage hole 1, and the distance from the energy dissipation structure 3 of the swirl shaft is 20-40m. The outlet section is the outlet of the diversion hole 2, which is located in the relatively complete rock section. In the dry season, when the water flow is small, the water flows from the main drainage hole 1 through the diversion hole 2, and is discharged from the outlet of the diversion hole 2 to the hillside, and then slowly flows into the downstream channel 8 of the reservoir dam along the natural channel of the hillside; , the water flows from the main drainage hole 1 through the energy dissipation structure 3 of the swirl shaft, and is discharged from the water outlet of the low drainage hole, and the 5th section of the low water outlet is connected with the downstream channel 8 of the reservoir dam. Drainage hole 1 is a city gate type. There is a partition wall 6 in the middle of the bottom plate. The starting end of the partition wall 6 starts from the entrance of the main drainage hole 1. The walls are connected, the height of the middle partition wall 6 should be higher than the water depth in the cave during the dry season, and the top width of the middle partition wall 6 should be 0.8-1.5m. In the dry season, when the water flow rate is small, at the entrance of the main drainage hole 1, weaving bag cofferdams or earth-rock cofferdams are piled up and repaired, and the water flows from the middle partition wall 6 of the main drainage hole 1 to the diversion hole 2- The side channel passes through the diversion hole 2, and is discharged from the outlet of the diversion hole 2 to the downstream channel 8 of the reservoir dam. Due to the small water flow, the water flow will flow along the mountain to the downstream channel 8 of the reservoir dam. The main drainage hole 1 and the energy dissipating structure 3 of the swirl shaft are overhauled on the channel on one side of the wall 6 facing away from the diversion hole 2;

The height of the outlet of the low drainage tunnel of the main drainage tunnel 1 is set between the high water level and the normal water level of the main river during the flood season, and cannot be higher than the elevation of the proposed construction road 9; the construction branch tunnel of the main drainage tunnel 1 can also be used as the diversion tunnel 2, and The design ratio is 0, and there is a lock chamber structure near the exit. The lock chamber structure can choose a bank tower lock chamber or a vertical shaft lock chamber, mainly according to the topographic and geological conditions, and adopt a lock chamber structure with less engineering investment. Since the inflow of the valley generally changes within a certain range, the actual inflow is not necessarily the design standard flow. When the inflow in the dry season is large, if the flow is discharged from the diversion hole 2, the water flow will produce a certain hydraulic jump, and the diversion hole The mountain where the exit 2 is located is at a high elevation, which will cause certain impact damage to the exit of the diversion tunnel 2 and the facilities or roads below the mountain. At this time, the gate of the lock chamber structure can be closed to let the water flow from the main drainage tunnel 1 through the swirl The shaft energy dissipating structure 3 is discharged from the outlet of the low drainage hole, thus avoiding possible adverse effects such as impact damage.

Claims (8)

1. ditch-water processes scupper structure, it is characterized in that: include main scupper (1), shunting hole (2) and rotational flow silo energy-dissipating structure (3), described rotational flow silo energy-dissipating structure (3) connects with main scupper (1), described shunting hole (2) connects with main scupper (1), and the connector tapping hole (2) and main scupper (1) is positioned at the upstream side of rotational flow silo energy-dissipating structure (3), also include high outlet (4) and low outlet (5), described high outlet (4) is arranged on the exit of shunting hole (2), the outlet of described low outlet (5) and rotational flow silo energy-dissipating structure (3).

2. ditch-water as claimed in claim 1 processes scupper structure, it is characterised in that: the connector of described shunting hole (2) and main scupper (1) horizontal range (h) from rotational flow silo energy-dissipating structure (3) Yu main scupper (1) connector place ranges for 20～40m.

3. ditch-water as claimed in claim 1 processes scupper structure, it is characterised in that: described shunting hole (2) is working tunnel.

4. ditch-water as claimed in claim 1 processes scupper structure, it is characterised in that: the slope ratio of described shunting hole (2) is 0.

5. ditch-water as claimed in claim 1 processes scupper structure, it is characterised in that: also including lock chamber structure, described lock chamber structure is positioned at the exit end stating shunting hole (2).

6. ditch-water as claimed in claim 1 processes scupper structure, it is characterised in that: the base plate centre position of described main scupper (1) is provided with mid-board (6).

7. ditch-water as claimed in claim 6 processes scupper structure, it is characterized in that: septum wall (6) arises from main scupper (1) porch, and septum wall (6) end is connected near the abutment wall of main scupper (1) side with shunting hole (2).

8. ditch-water as claimed in claim 6 processes scupper structure, it is characterised in that: the width (b) of septum wall (6) ranges for 0.8～1.5m.