JP3625743B2 - Resin tank floating and deformation prevention structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for preventing levitation and deformation of resin tanks such as septic tanks and water tanks buried in the ground.
[0002]
[Prior art]
It is well known that underground tanks buried in the ground may float due to groundwater or sand fluidization. This tendency is particularly remarkable in the case of a tank made of a lightweight material such as a resin tank.
[0003]
Conventionally, for resin tank levitation prevention structure, a flange that protrudes in the radial direction is provided on the outer wall of the tank, and a plurality of flanges that protrude in the radial direction are provided at the bottom of the tank. It is known that weight of soil cement (concrete) to be placed is applied to the flange and the collar as a weight to prevent the tank from floating (Japanese Utility Model Laid-Open No. 5-46798). reference).
[0004]
[Problems to be solved by the invention]
However, the above conventional anti-floating structure uses the weight of soil cement (concrete) thrown into the outside of the tank for the anti-floating weight, so the tank is embedded in a place where the groundwater level is high In this case, since the spring water is accumulated in the hole when the hole to be buried is excavated, the tank rises before the soil cement is put in, and the buried work is impossible.
[0005]
Further, in the case of using concrete or the like to be placed outside the tank in this way for preventing the ascent, there is a risk that the bottom and side walls of the tank may be deformed by earth pressure or water pressure after the tank is buried.
[0006]
The present invention has been made in view of the above-described conventional problems. By adopting a structure for injecting a liquid filling as a weight (weight) for preventing floating into the tank itself, the tank by buoyancy such as ground water is used. Provided is a resin tank levitation and deformation prevention structure that can reliably prevent the levitation of the tank, increase the strength of the tank itself, and effectively prevent deformation and breakage of the bottom and side walls of the tank due to earth pressure and water pressure. For the purpose.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a structure for preventing floating and deformation of a resin tank buried in the ground, wherein the bottom of the tank body has a double structure and a hollow portion is formed. A plurality of communication pipes that are disposed on the side wall of the main body at an appropriate interval in the circumferential direction and that extend in the longitudinal direction are provided integrally with the tank main body, and a lower end portion of the communication pipe communicates with the hollow portion. The upper end is opened at a position near the upper end of the tank body, and a reinforcing bar extending outward from the upper end opening is inserted into the communication pipe , and when the resin tank is embedded in the ground, A liquid filler such as mortar or ready-mixed concrete is injected from an upper end opening of the communication pipe, and the hollow portion and the communication pipe are filled and solidified , and the liquid filler filled in the communication pipe is formed of the reinforcing bar. From the top opening Via an extension portion extending towards, characterized in that it is integrated with the upper slab is Da設above the tank body.
[0008]
With the above configuration, the hollow portion of the bottom portion having a double structure and the liquid filling filled in each of the communication pipes increase the weight of the tank itself, prevent floating, and reinforce the bottom and side walls of the tank body. The In particular, the liquid filling filled in each communication pipe is integrated with an upper slab placed on the upper part of the tank body through an extension of a reinforcing bar inserted into each communication pipe, and the outer wall of the tank body Since the strut that reinforces is formed, the load resistance against the load applied to the upper part of the tank is greatly improved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.
[0010]
1 and 2 show a resin tank 1 having a floating and deformation preventing structure according to the present invention. The resin tank 1 is arranged on the tank main body 2 and the outer peripheral side wall of the tank main body 2 so as to be spaced apart by 90 degrees in the circumferential direction, and extends in the longitudinal direction substantially parallel to the axis of the tank main body 2. The communication pipe 3 is constituted.
[0011]
The tank body 2 is formed into a cylindrical body by reinforced plastic (FRP), and the bottom portion has a double structure to form a hollow portion 4, and an opening 5 through which the communication pipe 3 communicates with the outer peripheral wall of the hollow portion 4. Is provided. In addition, a supply port 7 having a rectangular cross-sectional shape is provided at the upper end of the tank body 2 so as to protrude from the cover 6. The hollow portion 4 is designed to have a volume capable of being filled with concrete having a weight capable of resisting the buoyancy expected when the entire tank 1 is buried in the ground.
[0012]
Similar to the tank body 2, the communication pipe 3 is formed into a semicircular tube having a transversal cross section by reinforced plastic (FRP), and has an arcuate wall 8 that follows the outer peripheral side wall surface of the tank body 2. Each communication pipe 3 is disposed so that the lower end portion 9 communicates with the opening 5 of the hollow portion 4, and the arcuate wall 8 is fixed to the outer peripheral side wall of the tank body 2 with an adhesive, so that the tank body 2 is integrated with the tank body 2. Is formed. Further, the upper end opening 10 of each communication pipe 3 is designed to extend upward from the cover portion 6 of the tank body 2 and to be positioned slightly below the supply port 7. This is because, when the tank 1 is buried in the ground, as will be described later, the upper slab 15 placed above the tank 1 and each communication pipe 3 are integrated.
[0013]
As shown in FIG. 5, the communication pipe 3 can be integrally formed with the tank body 2.
[0014]
When embedding the resin tank 1 having the above-described configuration in the ground, several reinforcing bars 11 slightly longer than the entire length (at least about 20 cm) are inserted into each communication pipe 3 in advance and protrude from the upper end opening 10. It is desirable to bend the extending portion 11a to be laterally bent. These reinforcing bar 11 to reinforce each communicating pipe 3, and is provided in order to strengthen the bond between the upper slab 15.
[0015]
3 and 4 show a state in which the resin tank 1 is buried in the ground. The tank 1 is first installed on a lower slab 13 laid at the bottom of the planned embedding hole 12. In this state, one of the four communication pipes 3 is left, and liquid fillers 14 such as mortar or ready-mixed concrete are injected all at once from the upper opening 10 of the other three communication pipes 3, and through the lower opening 5. The hollow portion 4 having a double bottom structure is filled. At this time, the communication pipe 3 that does not inject the liquid filler 14 becomes an air vent passage. Then, after confirming that the liquid filler 14 is filled in the entire hollow portion 4, the liquid filler 14 is also filled in each communication pipe 3. The filled liquid filling 14 is solidified to form a structure integrated with the tank main body 2 and the communication pipe 3, and the weight acts as a weight (weight) for preventing the tank 1 from rising, and the tank main body 2 The bottom formed in the double structure is reinforced. Further, the liquid filler 14 filled in each communication pipe 3 is wound around the reinforcing bar 11 and solidified, thereby serving as a support column that reinforces the outer peripheral side wall of the tank body 2.
[0016]
Subsequently, when the upper slab 15 is driven in the upper part of the buried resin tank 1, the upper slab 15 entrains the reinforcing bar extension portion 11 a extending from the upper end opening 10 of each communication pipe 3, and each communication pipe 3. The upper slab 15 is supported by the column, which is integrated with the column formed by the liquid filler 14 filled in the column. Therefore, even if a load higher than the load capacity of the resin tank 1 itself acts on the upper part of the resin tank 1, the load is distributed to the upper slab 15 and supported by the support column. Deformation and breakage can be effectively prevented.
[0017]
When the planned buried hole 12 is excavated in a place where the groundwater level is high, springs accumulate in the planned buried hole 12, but when the tank 1 is installed in the planned buried hole 12, the bottom of the tank body 2 is doubled. Since the structure is formed, even if the outer bottom plate in contact with the lower slab 13 is deformed by water pressure or the like, the inner bottom plate is hardly affected. Therefore, the use volume inside the tank body 2 does not decrease.
[0018]
【The invention's effect】
As described above, the present invention provides a weight (for preventing floating) to the hollow portion formed by making the bottom portion of the tank body into a double structure and the plurality of communication pipes disposed along the outer wall of the tank body ( by filling by injecting a liquid filler composed of a weight), Rutotomoni can reliably prevent floating of the resin tank according to groundwater and sand fluidization phenomena such as the strength of the tank itself by a liquid filler filled increases It is possible to effectively prevent deformation and breakage of the bottom and side walls of the tank body due to earth pressure and water pressure, and in particular, the liquid filler filled in a plurality of communication pipes is an extension part of a reinforcing bar inserted into each communication pipe Since the support column is formed integrally with the upper slab placed above the tank main body to reinforce the outer wall of the tank main body, the load resistance against the load applied to the upper portion of the tank is greatly improved.
[Brief description of the drawings]
FIG. 1 is a partially longitudinal front view of a resin tank provided with a floating and deformation preventing structure according to the present invention.
FIG. 2 is a plan view of the tank.
FIG. 3 is a partially longitudinal front view showing a state in which the tank is buried.
FIG. 4 is a plan view showing a state where the tank is buried.
FIG. 5 is a partially longitudinal front view showing another embodiment of a resin tank provided with the levitation and deformation prevention structure of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Resin tank 2 Tank main body 3 Communication pipe 4 Hollow part 5 Opening 6 Covering part 7 Supply port 8 Arc-shaped wall 9 Lower end part 10 Upper opening 11 Reinforcement 12 Embedded hole 13 Lower slab 14 Liquid filling 15 Upper slab

Claims (1)

A resin tank levitation and deformation prevention structure embedded in the ground,
The bottom of the tank body has a double structure and a hollow part is formed,
A plurality of communication pipes are provided on the side wall of the tank main body at an appropriate interval in the circumferential direction and extend in the longitudinal direction, and are integrally provided with the tank main body,
The lower end portion of the communication pipe communicates with the hollow portion, the upper end portion opens at a position near the upper end of the tank body, and a reinforcing bar extending outward from the upper end opening is inserted into the communication pipe. ,
When the resin tank is buried in the ground, a liquid filler such as mortar or ready-mixed concrete is injected from an upper end opening of the communication pipe, and the hollow pipe and the communication pipe are filled and solidified, and the communication pipe The liquid filling material filled in is integrated with an upper slab placed above the tank body through an extended portion extending outward from the upper end opening of the reinforcing bar. Structure to prevent the tank from rising and deformation.

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