JPH07189265A - Draining method of shallow sump in pit excavation construction and two tank type shallow sump - Google Patents

Abstract

PURPOSE:To solve a defect, in which construction cost is increased owing to the difficulty of the simultaneous execution of drainage construction and cut-off construction, the cause of the delaying of the term of work due to the difficulty of the simultaneous execution of both construction, the generation of the augmentation of the cost of construction due to the usage of an admixture and the burying of a drain pump at the time of a large quantity of spring water according to the status of spring water after a mat foundation is placed when a shallow sump as one tank is used in pit excavation construction. CONSTITUTION:An underwater pump 19 is installed into the main tank 3 of a shallow sump 1 divided into two of the main tank 3 and a sub-tank 4, spring water in the main tank 3 is discharged, the underwater pump 19 is transferred into the sub-tank 4, spring water is discharged into the sub-tank 4, the upper section of the main tank 3 is covered with an upper cover 11 and the main tank is hermetically sealed, and water in the sub-tank 4 is drained and the underwater pump 19 is removed. The opening edge of the shallow sump 1 separated into the main tank 3 and the sub-tank 4 is surrounded circumferentially with an upper frame 5, a large number of through-holes 8 are formed in parallel to the sidewall 7 of the main tank 3 and a sand preventive net 9 is stretched on an external surface, the main tank 3 is hermetically sealed with the upper cover 11, and a drain valve 15 is mounted on a partition wall 2 toward the sub-stank 4 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is mainly used for root cutting work and other underground works where solid foundation concrete is laid and a pot is provided to drain water. The present invention relates to a method of performing water and a 2-tank type kettle.

[0002]

2. Description of the Related Art Conventionally, in order to perform root cutting work, a solid foundation concrete is placed, a tank for one tank is installed in the central part, and water accumulated in the tank is pumped up by a drainage pump. If water was drained and the spring water was low, the water was drained from the water at the time when the water in the water tank was low, but the water was drained if there was a lot of spring water. Even in that case, it may be necessary to use an admixture such as a thickening agent or a hardening accelerator for the concrete depending on the situation of the spring water, and in the worst case, the concrete should be struck to cover the kettle. There was a case where it was set up and buried.

[0003]

When using a one-pot kettle as in drainage in the conventional root cutting work,
After pouring concrete of solid foundation, drainage may not progress depending on the situation of spring water, which may make it difficult to perform drainage work and water stoppage work at the same time, causing a delay in the construction period, or There was an increase in construction costs due to the use of admixtures. In addition, since the submersible pump is buried when the amount of spring water is large, there is also a drawback that the construction cost also increases.

The present invention eliminates these drawbacks, divides the kettle into two tanks, a main tank and a sub tank, and drains the spring water after draining the main tank to the sub tank to prevent the spring water from flowing. By draining the water that has moved into the sub tank so that it does not overflow from the main tank, it is possible to completely stop the water in the main tank. After the drainage of the water is completed, the drainage pump is removed, and spoiled concrete is also placed in the sub tank to completely seal the spring water from the ground, and a relatively simple structure for performing this drainage method. It is an object to provide a tank type kettle.

[0005]

In order to solve the above-mentioned problems, the present invention installs a submersible pump in the main tank of the cauldron which is divided into a main tank and a sub tank so as to prevent the spring water in the main tank. After draining with a submersible pump, move the submersible pump into the sub tank, and while letting the spring water after the drainage work flow into the sub tank, cover the upper opening of the main tank with a top lid and seal it. After the water stoppage work, the outflow of spring water from the main tank into the sub tank was blocked, and at the same time, the inflow water in the sub tank was drained by the submersible pump and the submersible pump was removed as a void. The drainage method of the kettle in root cutting work and the opening above each of the kettle separated into two tanks, the main tank and the sub tank by the partition plate in the center, and the upper frame around the upper edge However, a number of vertically long through holes are provided in parallel on the three side walls except the partition plate of the main tank to cover the upper frame of the main tank. On the outer surface of a large number of vertically extending through holes provided in the side wall of the main tank and the two tank type cauldron in the root cutting work in which the drain valve is provided on the sub tank side near the center of the partition plate. A means consisting of a two-tank type cauldron will be taken in the root cutting work in which a sand barrier is stretched.

[0006]

Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, an iron plate-made cauldron 1 is provided with a partition plate 2 in the center and is divided into two tanks, a main tank 3 on the left side and a sub tank 4 on the right side, and the upper parts of the main tank 3 and the sub tank 4 are open. An upper frame 5 and a lower frame 6 made of an angle member are provided so as to surround the upper edge and the lower edge thereof, and the three side walls 7 except the partition plate 2 slightly below the lower frame 6 are spaced from each other. A large number of vertically extending through holes 8 for draining water are provided vertically in parallel, and a sand screen 9 such as a stainless steel mesh is stretched on the outer surfaces of the side walls 7 on three sides. A rubber packing 10 is provided on the frame 5, and an upper lid 11 is provided on the rubber packing 10. The bolt holes 12a,
12b and 12c are provided, and bolts 13 are provided in these holes.
Is inserted and fastened tightly by a nut 14, and a drain valve 15 is attached to the central portion of the partition plate 2 below the position of the lower frame 6 toward the sub-tank 4 side.

Next, a drainage method of the kettle in the root cutting work will be described. In FIG. 2, when a required space of the ground 16 is excavated and a solid foundation 17 is placed in order to build a foundation or an underground portion of the building, the main tank 3 and the sub tank 4 are partitioned in the center of the space. The pit for burying the pottery 1 connected via the plate 2 is dug down to set up the pottery 1, and the pottery 1 is installed.
Place a solid foundation 17 around the. Since a large number of through holes 8 are provided in the side wall 7 of the main tank 3, the spring water 18 seeps into the main tank 3 through the sand-proof mesh 9 such as a stainless mesh, so the drain valve 15 is closed. The submersible pump 19 is installed in the tank 3, and the spring water 18 is pumped up and drained. Spring 1
Drain valve 1 so that 8 does not overflow from main tank 3
As shown in FIG. 3, the submersible pump 19 is moved into the sub-tank 4 and the drain valve 15 is opened at the same time as the sub-tank 4 increases the spring water 18 increasing in the main tank 3 as shown in FIG.
Submersible pump 1 that drains water inside and relocates the drained water
Pump and drain according to 9. In the meantime, the upper lid 1 is mounted on the upper frame 5 attached to the upper edge of the main tank 3 via the rubber packing 10.
1 and then tighten the bolts 13 and nuts 14 to completely seal the main tank 3.

Next, the drain valve 15 is closed, and the water accumulated in the sub-tank 4 is pumped up by the submersible pump 19 and drained. Then, the submersible pump 19 is removed from the sub tank 4. After that, as shown in FIG. 5, by placing concrete 20 of the main foundation of the structure into the upper part of the main tank 3 and the inside of the sub tank 4, it is possible to construct a foundation without fear of spring water from underground.

[0009]

According to the invention of claim 1, the kettle is divided into a main tank and a sub tank, and the spring water after draining the main tank is discharged to the sub tank. By moving the submersible pump to the sub tank, it can be drained from the sub tank.Therefore, the water in the main tank will not overflow from the main tank, and the water stopping work of the main tank can be easily performed without any obstacles. In addition, it is not necessary to inject admixtures, etc., and it is easy to relocate the submersible pump, so there is no need to bury the submersible pump.The sub tank can be drained by shutting off running water between the main tanks. It is completely drained and the main foundation can be built on a completely water-stopped ground, including useless concrete around the main tank and in the sub tank.

According to the second aspect of the present invention, the kettle is divided into two tanks by the intermediate wall, and the main tank which can be sealed with the upper lid is provided with a large number of through holes in three side walls except the intermediate wall. Since it has a simple structure in which a drain valve is provided on the tank side, no trouble occurs and the manufacturing cost can be reduced. With this device, the easy and complete drainage method of the invention of claim 1 can be performed. it can. Further, the invention of claim 3 prevents the fine particles of sand from entering the inside of the kettle through the large number of through holes provided in the side wall of the main tank by means of the sand-preventing net, and the amount of spring water accumulated in the kettle is reduced to prevent it. Does not reduce the water working time.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a kettle according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view showing a drainage method of the same.

FIG. 3 is likewise a vertical sectional front view.

FIG. 4 is a vertical sectional front view of the same.

FIG. 5 is a vertical sectional front view of the same.

[Explanation of symbols]

 1 Kamaba 2 Partition plate 3 Main tank 4 Sub tank 5 Upper frame 7 Side wall 8 Through hole 9 Sand protection net 11 Top lid 15 Drain valve 19 Submersible pump

Claims (3)

[Claims] 1. A submersible pump (19) is installed in a main tank (3) of a cauldron (1) which is divided into a main tank (3) and a sub tank (4).
After draining the spring water in the main tank (3) with the submersible pump (19), the submersible pump (19) is moved into the sub tank (4),
After the spring water after performing the drainage work is discharged into the sub tank (4), the upper opening (11) is covered on the upper opening of the main tank (3) to seal the water, and the water stop operation is performed. The outflow of spring water from the main tank (3) into the sub tank (4) is blocked, and at the same time, the sub tank (4)
A drainage method for a cauldron in root cutting work in which inflow water inside is drained by a submersible pump (19) and the submersible pump (19) is removed as a void. 2. An opening is provided above each of the kettles (1) separated into two tanks, a main tank (3) and a sub tank (4) by a partition plate (2) at the central portion, and their upper edges. An upper frame (5) is provided around the main tank (3), and side walls (7) on three sides of the main tank (3) excluding the partition plate (2) are provided with a number of vertically elongated through holes (8) in parallel. 2) in the root cutting work in which the upper lid (11) covering the upper frame (5) of (1) is detachably provided so as to be hermetically sealed, and the drainage valve (15) is provided on the sub tank (4) side near the central portion of the partition plate (2). Tank-type kettle. 3. The two tanks for root cutting work according to claim 2, wherein a sand-proof net (9) is stretched on the outer surface of a large number of vertically extending through holes (8) provided in the side wall (7) of the main tank (3). Kamaba.