JPS61122309A - Stopping of water from stand pipe for blocking water - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention can be used to increase the internal cross-sectional thickness of underwater structures such as caissons and wells, or to construct a pier on the top of a caisson. This applies to water supply methods for water supply stand pipes.

(Prior art) As mentioned above, when increasing the internal cross section of a caisson, etc.
When constructing a pier on top of a caisson, it is necessary to install a water-blocking standpipe and dry up the inside of the pier. At that time, it is necessary to completely shut off the water at the mounting part of the stunt knob.

Figure 5 shows this type of conventional water shutoff method, in which a 7-lunge (b) is provided at the lower end of the water-blocking standpipe (cL).
A water-stopping rubber gas foot (C) was interposed between the lunge (A) and the standpipe mounting surface for the caisson prisoner, and this was tightened with a tightening bolt (d) to stop water. .

(Problems to be Solved by the Invention) According to the conventional method, when installing the waterproof stunt knob, the bolts are tightened by underwater work using a dipper, so it is difficult to sufficiently tighten the bolts. Therefore, the water-stopping rubber gasket did not function adequately, and complete water-stopping could not be expected.

(Means for Solving the Problems) The present invention has been proposed to solve these problems, and includes a chamber integrally provided on the outer peripheral surface of the lower end, and a chamber provided on the inner and outer peripheries of the chamber, respectively. After installing a water-blocking standpipe equipped with flanges on the underwater structure with a water-blocking gasket interposed between each of the seven lunges,
The inside of the chamber is drained and hydrostatic pressure is applied to the chamber to perform primary water supply, and then the air inside the chamber is exhausted and atmospheric pressure is applied to the chamber to greatly tighten the water stop gasket. The present invention relates to a water-stopping method for a standpipe for water-blocking, which is characterized by applying force.

(Function) As described above, in the present invention, a chamber 2 is provided integrally with the outer circumferential surface of the lower end of the pipe, and a water-blocking stand pipe is used, in which seven lunges are provided on the inner and outer circumferences of the chamber. After the pipe is installed on the underwater structure so that the gasket for water supply is interposed between each of the seven lunges, water is drained from the chamber, so that hydrostatic pressure acts on the chamber and each of the water stop valves is A tightening force is applied to the gasket, and the next water stop is performed.

Then, since the air in the chamber is exhausted, atmospheric pressure acts on the chamber in addition to the hydrostatic pressure, and a large tightening force is applied to the water-stopping gasket.

(Effects of the Invention) According to the present invention, as described above, a chamber is integrally provided on the outer periphery of the lower end of the water-shielding standpipe, and seven lunges are provided on the inner and outer circumferences of the chamber, and each of the seven lunges and the A water-stopping gasket is interposed between the standpipe installation surface, the water in the chamber is drained, and the air is discharged, and the water-stopping gasket is heated by the hydrostatic pressure and atmospheric pressure acting on the chamber ζ. It provides a large tightening force that cannot be obtained by tightening bolts, making it possible to economically and completely shut off water.

At this time, the tightening force can be freely adjusted by adjusting the width of the chamber and the vacuum pressure.

Also, by providing water-stopping gaskets on both the inner and outer 7 lunges of the chamber, the stand is doubly water-stopped, and a much safer water-stopping effect can be obtained.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(1) is a water-shielding standpipe, and a chamber (2) is integrally provided over the entire outer circumference of the lower end of the standpipe.
Seven lunges (3) and (4) are provided on the inner and outer peripheries of 2), respectively.

Then, set the stand pipe (1) on the caisson (5) and the water-stop rubber gasket (6) between each of the seven lunges (3) and (4) so that a force is applied. , Temporarily tighten the outer periphery flange (4) with bolts (8) to fully stabilize the pipe (1) of the stand 3. (See Figure 2)
Next, the water in the chamber (2) is removed by the drain pump (9), and a hydrostatic pressure P1 is applied to the chamber (2). This hydrostatic pressure Px compresses and deforms the water-stopping rubber gaskets (6) and (7) to perform a primary water-stopping.

(See Figure 3) Next, the water in the stand pipe (1) is drained to make the inside dry, and the pol HO on the inner circumference 7 langes (3) is tightened from the inside of the stand pipe (1).

(See Figure 4) Next, the air inside the chamber (2) is exhausted by the vacuum pump (Ll) to make the inside of the chamber (2) into a vacuum state, and in addition to the hydrostatic pressure P, atmospheric pressure is applied to the chamber (2). P2 is applied to further completely press the water-stop rubber gaskets (7) and (8) installed under the inner and outer 72-inches (2) and (3). Furthermore, using this pressure bonding force, 7 lunges (3
) (11) to complete the water stop. (See Figure 1) As described above, according to the embodiment, the hydrostatic pressure and atmospheric pressure acting on the chamber (2) As a result, a large tightening force that cannot be obtained by tightening bolts can be imparted to the water-stopping rubber gasket (6) and (7), making it possible to achieve economical and complete water purification effects.

Further, the tightening force can be freely adjusted by adjusting the width of the chamber (2) and the vacuum pressure. Furthermore, since the inner and outer water gaskets (6) and (7) are double arranged, a complete and reliable water-stopping effect can be obtained.

In addition, by making the inside of the chamber (2) a vacuum and using the pressure bonding force that acts on the chamber (2),
(10 can be fastened, making it possible to retighten with a large pressure force. Furthermore, the seven inner and outer flanges (3) and (4) of the chamber (2) are connected to the caisson (10) via bolts (IG (8)).
5), the standpipe (1) can be easily removed, and the outer periphery 7 langes (4) are only temporarily tightened with bolts, so the dieper work is easy.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention. .

[Brief explanation of drawings]

Figure 1 shows a stunt nozzle for watering according to the present invention.
2, 3, and 4 are longitudinal sectional views showing the final steps of an embodiment of the water stopping method, and FIG. 5 is a vertical sectional view showing the steps of the water stopping method. It is a longitudinal cross-sectional view showing the implementation status of the standpipe water supply method. (1)...Water shielding stand/guib, (2)...Chamber, (3)...7 inner circumference lunges, (4)...7 outer circumference, (5)...・Caisson, (6)...Rubber gasket for water supply, (7)...Rubber gasket for water stop,
(8)...Bolt, (9)...Drain pump, C1O
...Bolt, (11)...Vacuum pump agent Patent attorney Shige Okamoto Three outsiders Part 1 Figure 5 Figure 4

Claims (1)

[Claims] A water-blocking standpipe having a chamber integrally provided on the outer circumferential surface of the lower end and flanges on the inner and outer circumferences of the chamber is placed on the underwater structure so that a water-blocking gasket is interposed between each of the flanges. After installation, the inside of the chamber is drained and hydrostatic pressure is applied to the chamber to perform a primary water stop, and then the air inside the chamber is exhausted and atmospheric pressure is applied to the chamber to apply water stop to the water stop gasket. A water-stopping method for a water-blocking standpipe characterized by imparting a large tightening force.