JPS6034634Y2 - Reinforced concrete water tank structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a submerged underground water storage tank structure, and more particularly to a reinforced concrete water tank structure that is cast on-site.

Underground water tanks are buried underground.

Therefore, a strong house with certain conditions is required due to the soil and internal water pressure, and if the material of the structure is reinforced concrete, the required thickness and reinforcing steel are required.

As the internal and external pressures increase, the components of the structure also increase in size.

Also, since the purpose of a fire prevention water tank is to provide water for extinguishing fires, a certain amount of water is required, and generally a larger capacity tank is required than a water tank for drinking water. .

When the scale of a water tank becomes large, it becomes impossible to manufacture the water tank as an integrated product in advance and transport it to the site for construction.

Therefore, it is necessary to divide the product into parts and assemble and install them on site.

In this case, it is necessary to prevent water leakage at the joints of the divided products, and mortar components and rubber plates are used to prevent water leakage.

As a construction method for water storage tanks, a submerged box construction method is generally used, in which hollow water tanks of various shapes are assembled on-site, and the soil inside is excavated and submerged using an excavator or human power.

In addition, a method of pouring concrete on-site after settling is generally used for the bottom plate concrete.

In this case, it is necessary to take measures to prevent water leakage at the joint between the prefabricated reinforced concrete side mass and the cast-in-place concrete, and to make the side mass retain the reaction force and shear force caused by water pressure that the bottom plate concrete receives.

Although these have been achieved in the prior art, there has been a need for a structure with even better effects.

This invention was proposed in response to that request, and its purpose was to sink the stacked side blocks using the submerged box method, and then
To provide a reinforced concrete water tank structure which securely holds bottom plate concrete cast on site on the inner wall surface of a side block and prevents water leakage at the joint between the bottom plate concrete and the side block.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In FIGS. 1 and 2, the water tank consists of hollow box-shaped side blocks 1 to 4 having a rectangular or polygonal planar shape, and upper side blocks 2, 3, and 4 are sequentially placed on top of the lowermost side block 1. It's an accumulation of things.

An inner lid 5 having a water outlet 14 is mounted on the top thereof.

As described above, the bottom plate concrete 9 is constructed on site after the lowermost block 1, etc. has settled using the submerged box construction method.

The outer dimensions of the lowermost block 1 are 3 to 5 cm larger than the outer dimensions of the upper block 2.3.4, and a step 10 is formed.

This reduces the frictional resistance caused by the soil around the side blocks during subsidence using the submerged box method, making subsidence easier.

On the other hand, the inner dimension of the lowermost mass 1 is also made larger by 3 to 5C711 than the inner dimension of the upper mass 2, so that a step 11 is formed at the joint.

Incidentally, a groove is carved all around the horizontal joint surface between the lowermost mass 1 and the upper mass 2, the horizontal joint surface between the upper mass 2 and the upper mass 3, etc., and the plastic rubber 15 is applied to this groove. Once installed, an adhesive such as epoxy resin is applied to prevent water leakage.

In FIG. 3, the inner wall surface of the lowermost block 1 has a convex handle 1a.
is formed.

The bottom plate concrete 9 is approximately centered on the top of this handle 1a.
will be constructed.

Swelling rubbers 8 and 8', which have the property of expanding when exposed to water, are arranged on the step 11 and the inclined surface of the handle 1a.

Further, the insert 6 and the reinforcing bars 7 are used to reinforce and hold the bottom plate concrete 9 to the side mass 1.

When the concrete base plate 9 is constructed, the swelling rubbers 8, 8' expand due to moisture in the concrete base plate 9, and fill the gap between the concrete base plate 9 and the lowermost mass 1.

Furthermore, the bottom plate concrete 9 is pushed upward by the reaction force of the force that causes the lowermost block 1 etc. to further sink.

This reaction force compresses the swollen rubber 8, 8', improving the watertightness between the concrete base plate 9 and the lowermost mass 1.

Moreover, this force also acts on the inclined surface of the handle 1a of the lowermost block 1 and presses the bottom plate concrete 9 against the lowermost block 1, thereby increasing the holding force.

In the above embodiment, the swelling rubbers 8, 8' are arranged only at two places, but the invention is not limited to this.

Further, the handle 1a is not limited to a convex shape, but may have a concave shape or another shape having an inclined surface.

As is clear from the above explanation, according to the present invention,
Watertightness is ensured at the joint between the side mass and the bottom plate concrete, water leakage can be prevented, and the effect of reliably holding the bottom plate concrete can be improved.

[Brief explanation of the drawing]

Figure 1 is a plan view showing a water tank to which the present invention is applied;
The figure is a cross-sectional view taken along the line A-A, and Figure 3 is a cross-sectional view showing details of the embodiment of the present invention. 2, 3.4...Top side block, 5...Inner lid, 6...Insert, 7...Reinforcement bar, 8, 8'... ...Swelling rubber, 9...Bottom plate concrete, 10.11...
...Step, 14...Water outlet, 15...
...Plastic rubber, 15a...Epoxy resin, etc.

Claims (1)

[Scope of utility model registration request] In a reinforced concrete water tank structure constructed by stacking two or more side blocks and using the submerged box construction method, the outer wall surface of the lowermost side block 1 is made to protrude with a step from the outer wall surface of the upper side block 2, etc. , the inner wall surface of the lowermost mass 1 is retracted with a step from the inner wall surface of the upper mass 2, and the lowermost mass 1
An uneven handle is formed on the inner wall surface over the entire circumference, and swelling rubbers 8, 8', etc. are arranged between the handle and the step position at the joint between the lowermost mass 1 and the upper mass 2. The reinforced concrete water tank structure is characterized in that, after the container is installed, a concrete bottom plate 9 is cast on-site at the positions where the handle and swelling rubber 8, 8' are provided.