JPH09105158A - Base plate mounting structure of water storage tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to simplify on site work and prevent the occurrence of water leakage by hanging down a base plate into the side frame of a water storage tank main body buried underground based on a PC method, supporting and fixing the base plate with a support member and applying a waterproofing treatment to a joint. SOLUTION: Side frames 1a and 1b segmented and formed in the horizontal direction are buried to a specified depth where the bottom ground is further excavated and rubble and leveling coarse sand are constructed. A temporary frame for a base plate pit 4 is hangingly lowered to a cavity provided at a specified position, thereby backfilling the surrounding area with earth and sand and forcibly injecting a cement set accelerating agent thereinto. After the earth and sand is solidified, the temporary frame is removed, thereby forming a base plate pit hole 7a. The base plate 7 formed based on a PC method, is hangingly lowered into a main body side plate 1a and loaded on a support member 9 provided on the main body side plate 1a where an angle material 9 is mounted at the top of the support member 9 and fixed with the main body side plate 1a by means of bolts 8, thereby filling up shrinkage compensating mortar in joints. The base plate 4 preliminarily formed with a steel plate is lowered in the base plate pit hole 7a and fixed therewith by means of bolts 11. At last, a water tank cover and a water suction pipeline are mounted, thereby forming a water storage tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for mounting a bottom plate to a lowermost body side frame in a water tank buried underground.

[0002]

2. Description of the Related Art Conventionally, when a water storage tank is formed in the ground, a hole for installing a water storage tank is dug at the site, a formwork is set in the hole, and concrete is poured into the hole. There are a PC digging method in which the side frame of the formed water tank main body is installed in the same hole as described above, and a PC digging method in which the tank is submerged.

In this PC submersion method, after a main body side frame of a water storage tank is buried in the ground, concrete is poured using a reinforcing bar projecting from a lowermost main body side frame, and a bottom plate is formed by casting in place. Was.

[0004]

However, in this PC submersion method, since the work is performed in a narrow and low place in order to construct a bottom plate at the site, the work is difficult and the work is difficult. And the completion of the bottom plate takes a lot of time.

[0005] The bottom plate mounting structure of the water tank according to the present invention is intended to solve the above-mentioned problems, and the purpose is to manufacture the bottom plate in a factory as well as the main body side frame and bury the main body side frame. It is an object of the present invention to provide a water tank bottom plate mounting structure in which the bottom plate can be suspended and fixed to the lowermost main body side frame after the completion of the operation, thereby shortening the work time on site and simplifying the work.

[0006]

The structure for mounting a bottom plate of a water tank of the present invention is intended to achieve the above-mentioned object, and means for supporting the bottom plate on a main body side frame of the water tank buried in the ground. Is formed, and the bottom surface of the bottom plate that is hung down by the support member is supported, and water leakage prevention processing is performed at the joint with the main body side frame.

Further, a support member for supporting the bottom plate is formed on the main body side frame of the water tank to be buried in the ground, supports the bottom surface of the bottom plate suspended by the support member, and supports the bottom plate by the support member. After supporting, an angle member is attached to the upper surface of the bottom plate, the angle member is fixed to the main body side frame to fix the bottom plate to the main body side frame, and further water leakage prevention treatment is performed at the joint between the main body side frame and the bottom plate. It was done.

Further, the supporting member may be formed of an angle member fixed to the side frame of the main body by a bolt.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a water tank bottom plate mounting structure according to the present invention. First
Figures and 2 show the completed state of the water tank buried in the ground, and la, lb, lc, and ld are main body side frames formed by dividing into horizontal directions. This body side frame Ia, l
b, lc, and ld are buried in the ground by the latent box method, and FIG. 3 shows a state where the ground has reached a bottom ground having a predetermined depth in the ground.

As shown in FIG. 1, the fixed ground is further excavated to construct the split rock 2 and the leveled rough sand 3. At this time, the portion where the bottom plate pit 4 is provided is the fourth As shown in FIG.

The size of the depression must be larger than the bottom plate pit 4. A temporary frame 5 having the same shape as the outer shape of the bottom plate pit 4 shown in FIG. 5 is placed in this concave shape as shown in FIG.

The temporary frame 5 shown in FIG. 5 has a hanging hook 5a attached to the upper surface of the counter, which is hung and placed in the depression as described above, and the outer periphery thereof is soiled as shown in FIG. Backfilled with 6.

A reinforcing beam 5b is provided inside the temporary frame 5 so that the temporary frame 5 is not deformed by the external pressure of the backfill. As shown in FIG. 7, a solidified material for solidifying the earth and sand is pressure-injected into the backfilled portion using an injection material such as a cement quick-setting material.

As the coagulating material, cement paste,
Polygrout or the like containing a urethane resin as a main component is used, and these solidified materials can rapidly solidify the outer periphery of the temporary frame 5.

The temporary frame 5 is immediately pulled up by the hanging hooks 5a immediately after the earth and sand 6 are solidified by the solidified material. As described above, the external shape of the temporary frame 5 is the same as the external shape of the bottom plate pit 4. Therefore, after removing the temporary frame 5, a space having the same shape as the bottom plate pit 4 is formed.

Then, the bottom plate 7 previously formed by the PC method is lowered into the main body side frame 1a, and the bottom plate 7 and the main body side frame 1a are lowered.
As shown in FIG. 8, a non-shrinkable mortar 10 is filled between the bottom plate 7 and the body side frame 1a, and a gap therebetween is closed as shown in FIG. . When installing the bottom plate 7, the space from which the temporary frame 5 has been removed must coincide with the bottom plate pit hole 7 a of the bottom plate 7.

Next, the bottom plate pit 4 formed of an iron plate is previously fixed in the bottom plate pit hole 7a with the bolt 11 as shown in FIG. Finally, the water tank lid 12 and the water suction pipe 13 are attached, and the construction of the water tank is completed. The water tank thus made has no gaps around the bottom of the bottom plate 7, the bottom plate pit 4, and the bottom. However, a very small amount of water tank, which does not affect the strength of the water tank, if any, can be obtained.

If the groundwater at the site is high and submerged, it is necessary to use a hydraulically solidified material (grout) to harden the surrounding earth and sand. In addition, if necessary,
The bottom of the bottom plate bit 4 has a plug 14 as shown in FIG.
A socket 15 with a screw that can be sealed with the pit 4 is attached, and the plug 14 is removed during the installation work of the bottom plate pit 4.
May be closed.

[0019]

As described above, according to the present invention, the bottom plate is manufactured at the factory in the same manner as the main body side frame, and the support plate is formed on the main body side frame to which the bottom plate is attached. Since it is configured to be supported by the support member of the main body side frame, it is possible to shorten the work time on site and simplify the work.

Further, after the bottom plate is placed on the main body side frame, the bottom plate and the main body side frame are fixed by the angle member on the upper surface side of the bottom plate, so that the bottom plate can be securely fixed to the main body side frame. As a result, there is no gap between the bottom plate and the main body side frame due to an earthquake or the like, and there is no water leakage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the entire water tank of the water tank bottom plate mounting structure according to the present invention.

FIG. 2 is a cross-sectional view of the same from another direction.

FIG. 3 is a sectional view showing a state in which a main body side frame is embedded.

FIG. 4 is a cross-sectional view of a state where a buried portion of a bottom plate pit is excavated.

FIG. 5 is a perspective view of a temporary frame.

FIG. 6 is a cross-sectional view showing a state in which the temporary frame is placed and earth and sand are backfilled.

FIG. 7 is a cross-sectional view showing a state in which the solidifying material is injected.

FIG. 8 is a partially enlarged sectional view of FIG. 1;

FIG. 9 is a cross-sectional view of a bottom plate pit.

[Explanation of symbols]

la, lb, lc, ld body side frame 7 bottom plate 8 bolt 9 support member (angle material) 10 non-shrink mortar (water leakage prevention treatment)

Claims (3)

[Claims] 1. A support member for supporting a bottom plate is formed on a main body side frame of a water storage tank buried in the ground, and a bottom surface of the bottom plate suspended by the support member is supported and water is leaked at a joint with the main body side frame. The bottom plate mounting structure of the water tank, which is characterized by the prevention treatment. 2. A support member that supports a bottom plate is formed on a main body side frame of a water tank that is buried in the ground, supports a bottom surface of the bottom plate that is suspended by the support member, and supports the bottom plate by the support member. After supporting, an angle member is attached to the upper surface of the bottom plate, the angle member is fixed to the main body side frame to fix the bottom plate to the main body side frame, and further water leakage prevention treatment is performed at the joint between the main body side frame and the bottom plate. The bottom plate mounting structure of the water storage tank, which is characterized in that 3. The water tank bottom plate mounting structure according to claim 1, wherein the support member is an angle member fixed to the main body side frame by a bolt.