JPH05163759A - Underground drainage and water storage equipment - Google Patents

Abstract

PURPOSE:To improve water storage or drainage capacity by setting the drainage or water storage water-channel of a vertically long cross-sectional area having a gradient under the ground of a city section or the like, to be connected to a river, and by setting a storage tank having a drain pump at the proper position of the water storage channel, to drain or store flood. CONSTITUTION:Under the ground of a national highway or the like, a drainage or storage water channel 1 having a stream gradient is formed, and is connected to the flood generation water source of a river or the like via a plurality of vertical shafts 2, 3, 4. After that, on constructing the water channel 1, its cross-sectional area is formed in the shape of a vertically long ellipse, a cocoon, or the like by using a miniature shield machine or the like. After that, at the proper position of the water channel 1, a water storage tank 5 having a drain pump P is set. When there is the possibility of flood, then the water of a river or the like is forcibly run into the tank 5 and is stored, and after the tank 5 is full of the water, it is stored in the water channel 1. Beside, after the completion of the flood, the stored water is discharged to the river by the pump P. As a result, in a less plane space, a large quantity of water can be stored, and sediment in the water channel is reduced, and the equipment can be easily maintained and can be easily constructed at a low cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an underground drainage water storage device, and more particularly to a drainage water storage device installed deep underground.

[0002]

2. Description of the Related Art Conventionally, there has been known a drainage / storage device in which a drainage / storage channel connected to a river on the ground is provided on the ground, and a large amount of water is guided to a reservoir by using the drainage / storage channel when a flood occurs. ..

[0003]

By the way, due to the recent tendency of urban areas to become dense, it has become difficult to provide a waste water storage channel on the ground as in the past. Therefore, as part of the deep underground use, the concept of constructing a large-scale pumping station with a drainage and storage function underground has been proposed.

The present invention has been made on the basis of realizing the above concept, and provides an underground drainage / water storage device which can store a large amount of water for the size of the installation site and is easy to maintain. The purpose is to

[0005]

In the underground drainage and storage device of the present invention, a drainage and storage channel having a longitudinal length longer than a horizontal dimension and having a water flow gradient is formed underground, and the drainage and storage channel is formed. A vertical shaft that is connected to a river on the ground is connected to multiple locations on the ground, and a water storage tank is connected to an appropriate location of the waste water storage channel, and a drainage pipe equipped with a drainage pump is connected to this water storage tank. is there.

[0006]

In this structure, since the drainage and storage channel is vertically long and has a short diameter in the horizontal direction, not only does it occupy a large amount of water, but the space occupied by the plane is small. Even if the amount of water introduced is small, the volume of water in the waste water storage channel becomes high, and the flow velocity becomes faster accordingly. Further, since the drainage and storage channel is formed underground, no inconvenience occurs even if the ground is used for other purposes.

[0007]

FIG. 1 is an explanatory view of an underground drainage and storage device according to an embodiment of the present invention, in which 1 is a drainage and storage channel, 2, 3 and 4 are shafts, 5 is a storage tank, 6 is a pump station, and G is a ground. is there. Wastewater storage channel 1
Is formed in a deep area, for example, 50 m underground, and has a water flow gradient θ itself. Further, the vertical shafts 2, 3 and 4 are communicated with a plurality of locations of the waste water storage channel 1. Vertical shafts 2, 3 and 4 are connected to water sources that may cause floods, such as rivers (not shown).
Flow rate diameters Q1, Q2 at intakes 21, 31, 41 of 3, 4
Q3 is installed. The water storage tank 5 is installed at the end of the drainage water storage channel 1, and a pumping station 6 is installed adjacent to the water storage tank 5. A drainage pump P is installed at the pump station 6,
An intake pipe 71 of the drainage pipe 7 is provided at the suction port of the drainage pump P.
However, the drainage pipe 72 of the drainage pipe 7 is connected to the discharge port of the drainage pump P, respectively. Further, a gate 8 is provided at a connecting portion of the water storage tank 5 with the waste water storage channel 1.

Here, the diameter of the drainage water storage passage 1 in the vertical direction is longer than the diameter in the horizontal direction. As a specific shape that satisfies this condition, as shown in FIG. 2, an ellipse elongated in the vertical direction Y,
As shown in FIG. 3, there is a cocoon shape that is long in the vertical direction Y. When constructing the drainage storage channel 1 having these shapes, an excavator such as a shield machine is often used.
In that case, there is an advantage that a shield machine with a small diameter can be used for construction. 2 and 3, X indicates the lateral direction. 2 and 3, D1 indicates the diameter in the vertical direction Y, and D2 indicates the diameter in the horizontal direction X.

[0009] In the above, the river water is vertical shafts 2, 3, 4
When it flows into the waste water storage channel 1 through some or all of the above, for example, when there is an excess storage space in the water storage tank 5, the gate 8 is opened and water is stored in the water storage tank 5, and the surplus water is stored in the water storage tank 5. When there is no water storage space, the gate 8 is closed and water is stored in the drainage storage channel 1. When water is stored in the waste water storage channel 1, the waste water storage channel 1 is inclined by the water flow gradient θ, so that water is collected on the end portion side of the waste water storage channel 1. Therefore, gate 8
When is opened, the water accumulated in the drainage water storage channel 1 vigorously flows into the water storage tank 5. In addition to this, since the waste water storage channel 1 has a vertically long shape, the volume of water increases even with a small amount of water, the flow velocity increases, and foreign substances such as sand are pushed away together with the water and are less likely to be deposited on the waste water storage channel 1. This helps facilitate maintenance to remove deposits.

Further, since the drainage water storage passage 1 has a vertically long shape, the internal space becomes large and a large amount of water can be stored in spite of the reduction of the planar exclusive space. Therefore, there is an advantage that a large amount of water can be stored in the basement of a national road, which is less likely to cause inconvenience in development in relation to land rights.

The water in the water storage tank 5 is discharged to a river or the like through the pipe 7 by appropriately operating the drainage pump P to draw it up.

[0012]

According to the present invention, it is possible to store a large amount of water while keeping the flat exclusive space small, and it is easy to perform maintenance because sand does not easily accumulate in the drainage water storage channel. effective. In addition, since the drainage water storage channel can be constructed with a small-diameter shield machine, the construction method is simple and economical. Therefore, it is extremely effective as a countermeasure against floods in areas where it is difficult to install drainage storage devices on the ground, such as urban areas.

[Brief description of drawings]

FIG. 1 is an explanatory view of an underground drainage and storage device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a specific shape of a waste water storage channel.

FIG. 3 is an explanatory diagram showing another example of a specific shape of the drainage water storage channel.

[Explanation of symbols] 1 drainage water storage channel 2 vertical shaft 5 water storage tank 7 drainage pipe P drainage pump θ water flow gradient X horizontal direction Y vertical direction D1 vertical diameter D2 horizontal diameter

Claims (1)

[Claims] 1. A drainage storage channel having a longitudinal length longer than a horizontal diameter and having a water flow gradient is formed underground, and shafts connected to rivers on the ground are formed at a plurality of locations of the drainage storage channel. An underground waste water storage device, which is connected to a water storage tank at an appropriate place of a waste water storage channel and to which a drainage pipe equipped with a drainage pump is connected.