JPH11152805A - How to check the water stop plate, water stop structure and water stop performance - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a water stopping plate, a water stopping structure used for a structure such as an underground tank, and a confirmation method for confirming the water stopping performance thereof. SOLUTION: An upper receiving plate 25 is attached to a side wall iron plate 21 by welding with a welding portion 27, and a rubber waterproof plate 41 is placed below the upper receiving plate 25. The vertical portion 33b of the L-shaped lower receiving plate 33 is placed at a position in contact with the side wall iron plate 21, the horizontal portion 33a of the L-shaped lower receiving plate 33 is attached to the bottom plate lower iron plate 23, and a rubber waterproof plate 41 is provided above the vertical portion 33b. Place the lower end of the. The holding plates 29 and 37 are placed on the rubber waterproof plate 41, the upper receiving plate 25 and the holding plate 29 are fastened with the bolt 31, and the holding plate 37 and the vertical portion 33 b are fastened with the bolt 39.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water stoppage plate, a water stoppage structure, and a method for checking water stoppage performance used in an LNG underground tank or the like.

[0002]

2. Description of the Related Art As an underground tank for storing LNG and the like,
In some cases, a side wall and a bottom plate are provided in the ground, and a water blocking plate is provided between the side wall and the bottom plate and between the side wall and the continuous ground wall.

[0003] In recent years, such underground tanks have been increased in size and depth, so that the groundwater pressure has increased, and the relative deformation between structural members such as side walls, bottom slabs, and underground continuous walls has also increased. For this reason, the water pressure acting on the water stop plate is 60
As a result, the deformation such as up and down, horizontal, and displacement increases, and severe conditions are imposed on the water stop plate.

FIG. 4 shows a structure in which a water blocking plate 105 is provided between an annular structure 101 and an annular structure 103.

FIG. 5 is an enlarged view of a portion A in FIG. 10
Reference numeral 7 denotes an iron plate of the annular structure 101, and reference numeral 109 denotes an iron plate of the annular structure 103. Receiving plate 111 on iron plate 107
Is provided by welding, and the receiving plate 117 is provided by welding to the iron plate 109. The rubber waterproofing plate 12 is provided on the receiving plate 111 and the receiving plate 117.
3 is placed, the holding plates 113 and 119 are placed, the bolts 115 and 121 are fastened, and the rubber waterproof plate 123 is fixed. The rubber water stop plate 123 is a rubber water stop plate containing a reinforcing cloth.

[0006]

However, this water stop plate 105 is provided with an annular structure 101, 1 as shown in FIG.
It is used for the joints of 03 comrades, and cannot be used as it is as a water stop plate at the joint of an annular and a circular slab such as an underground tank. In addition, there is no method for checking the performance after the water stop plate 105 is attached, and there is a problem that the water stop performance after completion cannot be checked in advance.

[0007] The present invention has been made in view of such problems, and an object of the present invention is to confirm a water stopping plate, a water stopping structure used for a structure such as an underground tank, and its water stopping performance. The purpose is to provide a confirmation method.

[0008]

According to a first aspect of the present invention, there is provided a plate-like member having a substantially plate-shaped cross section, an L-shaped member having a substantially L-shaped cross section, and It is a water stopping plate comprising a rubber water stopping plate interposed between the L-shaped members.
According to a second aspect of the present invention, there is provided a water blocking structure for a structure, wherein the water blocking plate according to claim 1 is provided at a joint of the structure.
According to a third aspect of the present invention, a water stop plate is attached to a joint of a structure, air is sent between the structure and the water stop plate, and the water stop performance is checked by leaking air. This is a method for checking water performance.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram of the underground tank 9. 1 represents the ground, 3 represents the ground surface, and 5 represents the groundwater table. The underground continuous wall 7 is constructed in the ground, the inside thereof is excavated to construct the bottom slab 11 and the side wall 13, and the roof 1 is placed on the side wall 13.
5 is provided. Water stoppage plate 17a between bottom plate 11 and side wall 13
Is provided between the side wall 13 and the underground continuous wall 7.
7b is provided. 19 indicates a water pressure.

FIG. 2 is a diagram showing the configuration of the water stop plate 17a. Reference numeral 21 denotes a side wall iron plate provided on the surface of the side wall 13, and reference numeral 23 denotes a bottom plate lower iron plate provided below the bottom plate 11. The upper receiving plate 25 is attached to the side wall iron plate 21 by welding with a welding portion 27, and the rubber waterproof plate 41 is placed below the upper receiving plate 25.

On the other hand, the vertical portion 33b of the L-shaped lower receiving plate 33
At the position in contact with the side wall iron plate 21, and the L-shaped lower receiving plate 3
The third horizontal portion 33a is attached to the bottom plate lower iron plate 23 by welding with a welding portion 35. The lower end of the rubber waterproof plate 41 is placed on the upper part of the vertical part 33b. Then, the holding plates 29 and 37 are placed on the rubber waterproof plate 41, the upper receiving plate 25 and the holding plate 29 are fastened with the bolt 31, and the holding plate 37 and the vertical portion 33 b are fastened with the bolt 39.

Before attaching the rubber waterproof plate 41, the vertical portion 33
A caulking 43 is provided between b and the side wall iron plate 21 to prevent leakage during an airtight test. Further, the bottom plate lower iron plate 23 and the side wall iron plate are welded by a required amount by the spot welding portion 45 in accordance with the test pressure, and the horizontal displacement of the bottom plate lower iron plate 23 due to the test pressure is restrained. Reference numeral 47 denotes a spot welded portion when the L-shaped lower receiving plate is manufactured. The rubber waterproof plate 41 is a rubber waterproof plate containing a reinforcing cloth that withstands high water pressure and easily absorbs displacement. Thus, the water stop plate 17a is provided.

Next, a procedure for confirming the water stopping performance of the water stopping plate 17a will be described. A groove 51 as shown in FIG. 3 is provided in the upper receiving plate 25, and a pipe 53 is inserted into the groove 51.
A pressure gauge 55 is attached to the pipe 53. Tube 5 in this state
3. Air is introduced from 3 and the rubber waterproof plate 41, the holding plate 29, 3
7. Check the air leak condition by applying soapy water to 7 and, if there is a defective part, tighten bolts 31 and 39 again.
After reconfirmation, concrete is poured. In addition,
Similarly to the water stop plate 17a, a water stop plate 17b is provided between the side wall 13 and the underground continuous wall 7.

As described above, according to the present embodiment, the junction between the ring and the circular slab can be stopped by the water stop plate 17 which can withstand high water pressure and can absorb displacement, thereby achieving high water stop. it can. In addition, since the water stopping performance can be confirmed by an arbitrary test pressure over the entire line of the water stopping plate 17, there is no construction failure and complete water stopping can be performed. Furthermore, since the water stop plate 17 is a water stop plate made of rubber, the reliability against repeated deformation is high.

[0015]

As described in detail above, according to the present invention, a water stop plate used for a structure such as an underground tank,
It is possible to provide a water stopping structure and a method for checking the water stopping performance thereof.

[Brief description of the drawings]

Fig. 1 Schematic diagram of the underground tank

FIG. 2 is a view showing a water stop plate 17a.

FIG. 3 is an explanatory view for confirming the water stoppage of the water stop plate 17a.

FIG. 4 is an explanatory view of water stoppage of an annular structure.

FIG. 5 is a view showing a water stop plate 105;

[Explanation of symbols]

 7 ... Underground continuous wall 11 ... Bottom plate 13 ... Side wall 17 ... Water blocking plate 25 ... Upper receiving plate 29 ... Holding plate 33 ... L-shaped lower receiving plate 37 ... … Retainer plate 41 …… Rubber waterproof plate 31, 39 …… Bolt

Continued on the front page (72) Inventor Tomoyuki Ogawa 1-3-8 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. Tokyo Branch (72) Inventor Atsuhiro Fukada 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Tomohiko Kashiwamura 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Inventor Keiichi Sakata 4-1 Ogishima, Tsurumi-ku, Yokohama-shi, Kanagawa (72) Inventor Masafumi Nakano Kanagawa Prefecture, Kanagawa Prefecture Yokohama City, 4-1 Ogishima Tokyo Gas Co., Ltd. (72) Inventor Yoshinori Kawamura 4-1 Tsurumi-ku, Yokohama City, Kanagawa Prefecture Tokyo Gas (72) Inventor Shinichi Miyazaki 4-1 Ogishima, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Tokyo Gas Co., Ltd. (72) Shinji Nakayama 1 Kashio-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Shares Inside the company Bridgestone

Claims (6)

[Claims] 1. A stop comprising a plate-like member having a substantially plate-shaped cross section, an L-shaped member having a substantially L-shaped cross-section, and a rubber waterproof plate sandwiched between the plate-like member and the L-shaped member. Water plate. 2. The water stopping plate according to claim 1, wherein the rubber water stopping plate is a rubber water stopping plate containing a reinforcing cloth. 3. A waterproof structure for a structure, wherein the waterproof plate according to claim 1 is provided at a joint of the structure. 4. The water stopping structure for a structure according to claim 3, wherein the structure is provided at a joint between the side wall and the bottom plate of the underground tank or a joint between the continuous underground wall and the side wall. 5. A water stoppage wherein a water stoppage plate is attached to a joint of a structure, air is sent between the structure and the water stoppage plate, and the water stoppage performance is checked by leaking air. How to check performance. 6. The method according to claim 5, wherein the leakage of air is confirmed by applying soapy water to the water stopping plate.