JPS604071B2 - Spherical tank support member reinforcement method and reinforcement support member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for reinforcing a support member of a spherical tank used for storing liquefied petroleum gas (LPG), etc., and a support member reinforced by the method.

The seismic design standard for spherical tanks conventionally used for storing LPG, etc., is to withstand a horizontal force of 0.22 to 0.3 times the weight of the tank including its contents (generally speaking, Tank support structures have been designed.

However, recently, this standard has been deemed insufficient in its seismic strength, and there is an opportunity for a new standard to be established to raise the seismic coefficient to approximately 0.45 to 0.6. However, unless a new spherical tank is installed in the future, in order to reinforce the support structure of an existing spherical tank to comply with this new standard, for example, the dimensions of each member in the support structure must be increased by one rank. Possible methods include replacing the tank or welding a bracket to the tank body and installing an oil damper between it and the foundation, but both require a long period of tank downtime for reinforcement work on the tank body and supporting members, and use fire. Therefore, the tank must be opened, and in addition, since tanks are generally constructed in batches, temporary fire walls must be installed to protect other tanks from fire in order to carry out hot work, which increases construction costs. It had some problems, such as being bulky.

Furthermore, since the oil damper method requires a large foundation, it has the disadvantage of affecting the foundation of existing tanks. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a new method for easily reinforcing an existing spherical tank support structure without using fire, and a reinforcing support member thereof, which overcomes the difficulties of these conventionally proposed reinforcement methods. There is something to do.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention. The lower part of the spherical tank is made up of a number of supports 3 fixed on the foundation 2.
It is supported by 3... These pillars are made of pipes, and for example, 16 pillars are arranged evenly at the bottom of the spherical tank. Tie rod fittings 4', 4' are diagonally used as reinforcing members between the pillars 3, 3. The ends of the placings 4', 4' are fixed to a plate fixed to a column, as is conventionally used. In many cases, pipes are used as supports for spherical tanks. Such support struts and plating are reinforced in accordance with the present invention by filling the pipe struts with a compression resistant material such as mortar or concrete. In this way, by press-fitting and solidifying mortar into existing pipe supports, it is possible to create a mortar core that is particularly resistant to compression on the inside, and a steel pipe jacket that is particularly resistant to tension on the outside, and without using any fire. It can be easily enforced without That is, holes 5 and 6 with a diameter of about 10 cm are drilled in the upper and lower parts of the steel pipe support 3 using a non-spark drill or the like, and mortar or concrete mixed in an external mixer truck 8 is poured into the lower part of the steel pipe support 3 through a conduit 10 using a pump 9. Inject through the injection valve 11 provided in the hole 6, remove the pressure from the upper hole 5, and finally close the pent valve 12 provided in the upper hole and press-fit mortar or concrete through the injection valve 11 provided in the lower hole 6. ``Pour mortar or concrete completely and densely.Reinforcing bars such as wire may be inserted into the steel pipe as necessary.Additionally, pressure relief holes 7 and pent valves 12 may be inserted in the middle of the support 3 as necessary. It is also possible to adjust the filling pressure of mortar or concrete by providing a tie rod placing 4', 4' between the pillars 3, 3, as well as a structure that supports the pillars from both sides. A pair of placings 4, 4 are diagonally fixed to the pillar as reinforcing sections.

FIG. 2 is a detailed front view of the lower part of the column 3. A series of members forming placings 4, 4 at both ends of the pin 13 passing through the column include a tie rod 15, a tumble buckle 16, and a ring joint plate 14. Tyrod 1
7 are connected to each other, and the other end of the tie rod 17 is similarly connected to the upper part of the adjacent column via a pin and a ring joint plate. By adjusting the tongue buckle 16, the tension applied to the tie rod 17 can be increased or decreased. In this way, the tie rods used for placing between adjacent struts are subjected to tensile force and are rarely subjected to compressive forces, so tie rods made of steel, which are strong against tensile forces, are used.

FIG. 3 shows a view taken along the line A--A in FIG. 14, 14 in the figure
' and 17, 17' respectively indicate ring joint plates for connecting tie rods to adjacent columns, and 18 indicates mortar filled in the column 3. The tie rod may be solid or hollow, ie, a steel tube. thus,
When the design requires an increase in seismic coefficient in a spherical tank support structure, conventional tie rod bracing may lack tensile strength and cause the support structure to fail, but the reinforcing method of the present invention provides a structure that is resistant to compression. At the same time as the columns are reinforced with mortar or concrete, the tie rod placement can be easily additionally reinforced, which is extremely effective in meeting the demands for increased seismic coefficients, and can be easily applied to existing spherical tanks without using fire. It can be enforced against supporting villages.

The injection material can be either mortar or concrete. In addition, only steel is used in the pressing parts, which are rarely subjected to compressive force, to provide a rational reinforcing effect that resists tensile force.

[Brief explanation of the drawing]

FIG. 1 is an explanatory front view of an embodiment of the present invention, and FIG.
3 is a partially detailed front view of the figure, and FIG. 3 is a view taken along the line A--A in FIG. 2. 1... Spherical tank, 2... Foundation, 3... Strut,
4... Placing, 4'... Conventional tie rod placement, 5... Pillar top hole, 6... Pillar bottom hole, 7... Pillar pressure elimination hole, 81... ... Mixer truck, 9 ... Pump, 10 ... Conduit, 11 ... Injection valve, 12, 18 ...
Vent valve, 13...Pin, 14...Ring joint plate, 16, 17...Tie rod, 16...
Tambatsukuru. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] 1 A hole for injecting a coagulant such as mortar is formed in the lower part of the steel pipe support that is a spherical tank support member, and a pressure relief hole is bored in the upper part, and a pin for holding the bracing material between adjacent supports is provided. After drilling a pin hole and inserting the bracing material holding pin, coagulant is injected tightly from the lower coagulant injection hole, and the upper pressure relief hole and lower coagulant injection hole are closed and the inside is closed. 1. A method for reinforcing a spherical tank support member, comprising solidifying mortar injected into the spherical tank supporting member and attaching a bracing material to an end of the bracing material holding pin. 2 A steel pipe strut and a bracing material, which are spherical tank support members, are respectively filled with a coagulant such as mortar and solidified within the steel pipe, and a strut embedded in the coagulant, with the end extending outside the strut. A spherical tank reinforcing support member comprising a steel bracing material fixed to a bracing holding pin protruding from the spherical tank.