JPH02285115A - Collecting method for groundwater - Google Patents

Abstract

PURPOSE:To make collecting of groundwater in a wide-ranged area economically possible by constructing a plurality of shafts, penetrating through the permeable layer, and a horizontal conduit for connecting each of the shafts, and by providing pumping equipment to smaller numbers of the shafts. CONSTITUTION:A continuous underground wall 1 is constructed at a place where running gradient of groundwater is appropriate. Then a collecting-and- pumping shaft 2 and collecting shafts 3, each having wall surfaces made of porous material, are constructed upright at upstream side of the continuous underground wall 1, and pumping equipment comprising pumps and pumping pipes is provided at the bottom of the collecting-and-pumping shaft 2. Lower part of all of the shafts 2 and 3 are then connected with the pumping equipment installed only to smaller numbers of the collecting-and-pumping shafts 2 and, at the same time, number of collecting shafts 3 can be smaller than in a structure of conventional type.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a water collection method for pumping groundwater above ground.

<Conventional Technology> Various groundwater collection facilities have been developed and put into practical use, but they have had the following problems.

<A> There is a limit to the range of the Uke per water collection shaft. Therefore, it was necessary to construct a very large number of shafts.

<Exp> Pumping equipment had to be installed for each shaft, and if there were a large number of shafts, a large number of pumping equipment would also be required, which was uneconomical.

<C> When there were a large number of pumping shafts, various techniques and equipment were required to properly manage the pumping equipment, making management work difficult.

<Objective of the present invention> The present invention was made in order to improve such conventional drawbacks, and the purpose of the present invention is to provide a water collection method that can economically collect groundwater over a wide range and pump it. shall be.

<Configuration of the Present Invention> Next, a case will be described in which an embodiment of the present invention is applied to an underground dam.

However, the method of the present invention does not necessarily have to be combined with an underground dam (it can also be used as an independent water collection method).

<A> Construction of a continuous underground wall A continuous underground wall 1 is constructed at a location where the gradient of groundwater flow is appropriate.

Since various methods have already been developed for constructing this continuous underground wall 1, it is possible to adopt the most suitable method depending on the ground and other conditions.

The lower end of the continuous underground wall 1 reaches the impermeable layer and blocks the flow of groundwater there.

In other words, an underground dam will be constructed here.

The length of the continuous underground wall 1 varies depending on the topography, but may be several hundred meters long.

<mouth> Vertical construction The flow of underground water is blocked by the continuous underground wall 1.

Therefore, two types of vertical structures are constructed vertically on the upstream side of the continuous underground wall 1.

The two types of vertical shapes are collection/pumping vertical shape 2 and water collection vertical shape 3.

Both the water collection/pumping vertical shape 2 and the water collection vertical shape 3 are hollow vertical shapes whose walls are made of porous material.

However, the collection/pumping vertical shape 2 is a vertical shape that not only collects the groundwater that has passed through the porous material, but also pumps the groundwater to the ground using pumping equipment such as a pump.

Therefore, water pumping equipment such as a pump and a pumping vibrator are provided at the bottom of the collection/pumping vertical shape 2.

On the other hand, the other water collection verticals 3 are verticals that simply collect groundwater that has passed through the porous material.

The water collection vertical 3 is a hollow vertical whose wall surface is made of a porous material, but it can also be used by filling the inside with aggregate 5 as shown in FIG. 2.

Kuha〉Connection water collection shaft Each vertical 2.3 is not only constructed independently.

The lower portions of all the verticals 2.3 are connected by connecting water collection horizontal shafts 4.

This connecting water collection horizontal shaft 4 is constructed from the bottom of each vertical 2.3 by poling, thrusting method, or other construction method, and is penetrated by digging toward the adjacent vertical 2.3. It is something.

Since the periphery of the connecting water collection horizontal shaft 4 is also made of porous material, it is possible to collect surrounding groundwater.

Even if the inside of the connecting water collection horizontal shaft 4 is left hollow,
Alternatively, the inside may be filled with gravel or other permeable material.

<2> Example of constructing a horizontal water collection shaft It is also possible to adopt a structure in which the horizontal water collection shaft 6 is constructed horizontally from each vertical shaft 2.3 toward the upstream direction of the underground water flow. (Fig. 3) This horizontal water collection shaft 6 is also made of a porous material, and is used either as a hollow interior or filled with a water-permeable material.

<E> Embodiment with only collection/pumping verticals The above embodiments have a configuration in which the collecting/pumping verticals 2 and the water collecting verticals 3 are constructed in parallel.

However, as shown in Fig. 4, it is also possible to adopt a structure in which only the collection/pumping vertical 2 is constructed, and a large number of water collection horizontal shafts 6 are constructed radially in the horizontal direction from this collection/pumping vertical 2. can.

<Effects of the Present Invention> Since the present invention has the above structure, the following effects can be achieved.

A large number of water collection verticals are connected by horizontal connecting water collection shafts, allowing water to move freely between the water collection verticals.

Therefore, water can be pumped from a wide range of water collection verticals by simply installing water pumping devices in only a small number of collection/pumping verticals, making management extremely easy.

<Entrance> Since there is a connecting shaft in the horizontal direction that can also collect water, it is possible to collect water over a wide range, and the number of water collection vertical structures can be reduced compared to conventional structures.

[Brief explanation of drawings]

Figure 1 9 An explanatory diagram of an embodiment of the water collection structure of the present invention Figures 2 to 4: An explanatory diagram of another embodiment

Claims (1)

[Claims] (1) Construct multiple shafts that penetrate the permeable layer, the walls of these shafts are porous, and the shafts are connected by water collection shafts, and these water collection shafts are also made of porous material. A groundwater collection method in which a small number of shafts are equipped with pumping equipment.