CN206205109U - A kind of underground workshop seepage drainage manifold arrangement - Google Patents

Abstract

The utility model relates to an arrangement structure of a leakage and drainage main pipe of an underground powerhouse of a hydropower station. The purpose of this utility model is to discharge the seepage water from the underground powerhouse to the reservoir based on the built buildings of the water transmission and power generation system through the method of water pumping and self-flowing drainage, so as to achieve the purpose of reducing construction projects and saving investment. The technical scheme of the utility model is: the layout structure of the leakage and drainage main pipe of the underground powerhouse of the hydropower station, which has a main powerhouse, a water collection well and an auxiliary factory building in the water transmission and power generation system, and a drainage pump is installed in the water collection well and an outlet of the drainage pump is provided. It is characterized in that, The leakage drainage main pipe starts from the outlet of the drainage pump and is embedded in the main powerhouse, and then lays the tailwater branch pipe in the original system from the main powerhouse and passes through the other end of the tailwater branch pipe. The leakage drainage main pipe is then laid sequentially Into the tail water tunnel, the tail water surge chamber and the tail adjustment ventilation tunnel, the end of the seepage drainage main pipe and the tail adjustment ventilation tunnel are connected to the reservoir.

Description

A layout structure of leakage and drainage main pipes for underground powerhouses of hydropower stations

technical field

The utility model relates to an arrangement structure of a leakage and drainage main pipe of an underground powerhouse of a hydropower station. Applicable to water conservancy and hydropower projects.

Background technique

The leakage and drainage of the underground powerhouse of the hydropower station generally adopts the scheme of pumping drainage + self-flowing drainage. The pipe is laid to the drainage pipe and the traffic shaft 102, and is buried up to the drainage hole 103 along the drainage pipe and the traffic shaft 102, and flows to the reservoir 7 from the drainage hole. In order to meet the direction of the main seepage drainage pipe 1, this layout plan needs to add new caverns such as the lower pipeline corridor 101, drainage pipe and traffic shaft 102, and drainage tunnel 103 in terms of civil engineering, which increases the excavation and lining engineering volume of the caverns. At the same time, the safety risk is also increased in the tunnel section with poor geological conditions.

Contents of the invention

The technical problem to be solved by the utility model is: to provide an arrangement structure of the leakage and drainage main pipe of the underground powerhouse of a hydropower station, which aims to drain the seepage of the underground powerhouse based on the built buildings of the water transmission and power generation system through the method of pumping and draining + self-flowing drainage. Leakage is discharged to the reservoir to achieve the purpose of reducing construction projects and saving investment.

The technical solution adopted by the utility model is: the layout structure of the leakage and drainage main pipe of the underground powerhouse of the hydropower station has the main powerhouse, the water collection well and the auxiliary powerhouse in the water transmission and power generation system, and the drainage pump is installed in the water collection well and the outlet of the drainage pump is set. That is, the leakage and drainage main pipe starts from the outlet of the drainage pump and is buried in the main powerhouse, and then the tailwater branch pipe in the original system is laid from the main powerhouse and passes through the other end of the tailwater branch pipe. The tail water tunnel, tail water surge chamber and tail adjustment ventilation tunnel are laid in sequence, and the end of the seepage drainage main pipe and the tail adjustment ventilation tunnel are connected to the reservoir together.

The beneficial effects of the utility model are: the utility model is simple in structure, convenient in construction, does not need to add the excavation and lining of the lower pipeline gallery, drainage pipeline and traffic shaft, and drainage hole, and reduces construction projects. High-quality hydraulic structures achieve the same drainage effect, which greatly saves engineering investment.

Description of drawings

Fig. 1 is a schematic plan view of an embodiment of the utility model.

detailed description

As shown in Figure 1, the layout structure of the leakage and drainage main pipe of the underground powerhouse of the hydropower station in this embodiment includes some hydraulic structures necessary for the water transmission and power generation system, such as the main factory building 8, the water collection well 9 and the auxiliary factory building 10 in the main factory area; the tunnel area There are tailwater branch pipe 3 (in this example, there are two tailwater branch pipes, tailwater branch pipe I3-1 and tailwater branch pipe II3-2), tailwater tunnel 4, tailwater surge chamber 5 and tailwater adjustment ventilation tunnel 6. There is also a main intersection tunnel 11 and a tailgate tunnel 12; the downstream side is the reservoir 7. The seepage water in the factory building merges in the sump well 9, and the water in the sump well is extracted out by the drainage pump again.

In this embodiment, a drainage pump outlet 2 is set at the head of the water collection well, and from the drainage pump outlet 2, the seepage drainage main pipe 1 is buried in the main powerhouse 8, and then the tailwater branch pipe I3-1 is laid from the main powerhouse The other end of the branch pipe goes out, and the seepage drainage main pipe 1 is laid to the tail water surge chamber 5 through the tail water tunnel 4, and buried upwards along the tail water surge chamber 5 to the tail water adjustment vent hole 6, and then from the tail water adjustment air hole 6 is laid to reservoir 7 all the time.

After the seepage water from the powerhouse is pumped out from the water collection well, it passes through the main powerhouse 8, the tailwater branch pipe I3-1, the tailwater tunnel 4 to the tailwater surge chamber 5 in sequence in the leakage drainage main pipe 1, and can be Artesian flow to reservoir 7.

The tailwater branch pipe 3 can be multiple. For example, the tailwater branch pipe II3-2 in this example is also connected to the tailrace tunnel 4, but the tailwater branch pipe II3-2 is not related to the seepage drainage main pipe 1, so there are not many for description.

Through this arrangement, the excavation and lining of the lower pipeline corridor, drainage pipeline and traffic shaft, and drainage tunnel can be directly reduced, and engineering risks are reduced.

Claims (1)

1. An arrangement structure of the leakage and drainage main pipe of the underground powerhouse of a hydropower station, which has a main powerhouse (8), a water collection well (9) and an auxiliary powerhouse (10) in the water transmission and power generation system, and a drainage pump is installed in the water collection well and an outlet of the drainage pump is provided (2), it is characterized in that: the leakage main pipe (1) is buried in the main powerhouse (8) from the outlet of the drainage pump (2), and then laid into the tail water branch pipe (3) in the original system from the main powerhouse ) and go out from the other end of the tail water branch pipe, the seepage drainage main pipe (1) is then sequentially laid into the tail water tunnel (4), the tail water surge chamber (5) and the tail water adjustment vent hole (6), the seepage The end of the leakage drain main pipe (1) is connected with the reservoir (7) together with the tail adjustment air hole (6).