JP6430077B1 - Storage tank construction equipment - Google Patents

Abstract

To provide a storage tank construction device that transports factory-produced storage tanks to the installation site so that they can be installed with less work on the installation site, reduce the risk of site construction, and shorten the construction period. A cylindrical outer tub side plate 6 and inner tub side plate 7, a roof portion 3 provided on the upper portion of the outer tub side plate 6, the outer tub side plate 6 and the inner tub A storage tank T constructed by constructing a bottom plate portion 4 provided at a lower portion of the side plate 7 and an anchor strap 20 for connecting the inner tank side plate 7 and the base plate 10 is provided. A truck 36 with a jack is supported in a state where the storage tank T is supported in a space between a means for transporting to the installation site in a supported state and a plurality of pedestals 42 protruding on a concrete foundation 41 constructed on the installation site. Means for carrying in and placing the base plate 10 of the storage tank T on the pedestal 42, means for forming the column base 46 while holding the tank body 1 with the truck 36 with jack, and placing the base plate 10 Of the basic version 10 And it means to dismiss towards.

Description

  The present invention relates to an apparatus for constructing a cryogenic liquid storage tank such as liquefied natural gas (LNG) or an oil storage tank, and more specifically, can be produced in a factory and transported to an installation site by means of transportation. The present invention relates to a so-called modular storage tank construction apparatus of a movable type.

Conventionally, a cryogenic liquid storage tank for storing LNG or the like is constructed at the installation site. If the structure of such a cryogenic liquid storage tank is the single containment tank system (Single Containment Tank System) described in API (American Petroleum Institute) 625, it will be constructed on a reinforced concrete base plate and on this base plate. The outer tank bottom plate, the outer tank side plate rising from the outer periphery of the outer tank bottom plate, the inner tank bottom plate made of low-temperature steel disposed on the outer tank bottom plate via a cold insulation material, and the inner tank bottom plate An inner tank side plate made of low-temperature steel that is arranged from the outer periphery and is spaced from the outer tank to place a cold insulation material, an outer tank roof that is joined to the upper end of the outer tank side plate, and an outer tank It has a steel sealing deck that is suspended from a roof with a steel hanger and holds cold insulation.

When constructing such a cryogenic storage tank, construct a concrete foundation slab at the construction site, proceed with the construction of the outer tank bottom plate on the foundation slab, then proceed with the installation of the outer tank side plate, It is common to construct a tank bottom plate and an inner tank side plate, then raise the roof assembled in the inner tank side plate by an air lasing method and assemble it to the upper end of the storage tank (see Patent Documents 1 and 2). ). In a relatively small tank, there is a method in which a scaffold is installed in the inner tank side plate and the roof is directly lifted by a crane instead of the air lasing method.

JP 2012-192967 A Japanese Patent No. 5946579

As described above, conventional cryogenic liquid storage tanks such as LNG are usually on-site construction, and it is necessary to prepare materials and construction equipment in advance on the construction site. Storage tank construction sites are located not only in Japan but also around the world, and it is necessary to arrange skilled workers for each construction site. On-site work may be delayed due to unseasonable weather, etc., depending on the region, resulting in increased construction costs. In particular, in areas where the wages of field workers are high, if construction stagnation or delay occurs, the additional cost for compensation will be enormous, which is one of the risks facing companies operating overseas. . In addition, when constructing a tank in a cold region, there may be a limit to the period during which construction can be performed in one year, and there is a case where shortening the construction period on site is required.
From the perspective of LNG demand, demand for small-scale LNG power generation is expected to increase in developing countries and regions composed of large and small islands. What is needed is a modular storage tank.

  The present invention is intended to solve such problems related to the prior art, and transports the factory-produced storage tank to the installation site so that it can be installed with less work on the installation site, thereby reducing the risk of site construction. The purpose of the present invention is to provide a storage tank construction device that can reduce the construction period and the whole construction period on site.

  The inventors manufactured modular storage tanks at factories and transported them to the installation site so that they can be constructed with less work, so that they are affected by unforeseen circumstances such as irregular weather at the construction site. Thus, the present inventors have found that it is possible to reduce the risk due to on-site construction and shorten the construction period, and have completed the present invention.

  That is, the storage tank construction device of the present invention is a cylindrical outer tub and an inner tub side portion on a foundation plate cast and molded in a factory, a roof portion provided on the upper portion of the outer tub side portion, The storage tank manufactured by constructing the tank body by constructing the bottom plate part provided at the lower part of the outer tank and the inner tank side part respectively, with the lower surface of the foundation plate supported by a truck with a jack A carriage with a jack is carried in a state where the storage tank is supported in a space between a means for transporting to and a plurality of pedestals projecting on a concrete foundation constructed at an installation site, and the trolley is loaded on the pedestal. It is characterized by comprising means for mounting or connecting the base plate of the storage tank and means for moving the cart with jack out of the base plate after mounting or connecting the base plate.

  The storage tank construction apparatus according to the present invention includes a cylindrical outer tub, an inner tub side portion, a roof portion provided on an upper portion of the outer tub side portion, and the outer tub on a foundation plate formed in a factory. And the storage tank manufactured by constructing the tank body by constructing the bottom plate part provided at the lower part of the inner tank side part, respectively, and transporting it to the installation site with the lower surface of the foundation plate supported by a truck with a jack Means, a means for carrying a truck with a jack in a state where the storage tank is supported in a space between a plurality of reinforcing bar joints projecting on a concrete foundation constructed at an installation site, and the truck with a jack is stored. While supporting the tank, move to a predetermined position so that the position of the reinforcing bar protruding from the foundation slab and the concrete foundation overlaps, and keep the height with a trolley with a jack or a jack. Connect the reinforcing bars to the plate Means for constructing the remaining reinforcing bars such as strips, enclosing with a formwork and placing concrete to form column bases, and after the column bases meet the required strength, And a means for retreating outward.

  More preferably, SPMT is used as the cart with jack.

  According to the storage tank construction apparatus of the present invention, the factory-produced storage tank can be transported to the installation site and can be installed with less work at the installation site, reducing the risk of site construction, and shortening the construction period and the overall construction period. It becomes possible.

It is a vertical side view of the storage tank manufactured by the manufacturing apparatus which concerns on one Embodiment of this invention. It is process drawing which shows the manufacture and transport means of a storage tank. FIG. 3 is a plan view of FIG. 2. It is explanatory drawing of the sea transportation of a storage tank. It is process drawing which shows 1st Embodiment of the construction apparatus of a storage tank. It is process drawing which shows 2nd Embodiment of the construction apparatus of a storage tank. It is a top view of FIG.5 and FIG.6. It is process drawing which shows the other transportation means of a storage tank. It is process drawing which shows 3rd Embodiment of the construction apparatus of a storage tank.

  Hereinafter, the present invention will be described in more detail using embodiments shown in the drawings. However, the present invention is not limited to these embodiments, and is limited only by the technical ideas described in the claims.

  FIG. 1 is a longitudinal side view of a cryogenic liquid storage tank such as LNG which is an embodiment of the present invention. As shown in FIG. 1, the storage tank T of this embodiment is basically composed of a tank body 1 and a concrete base plate 10 that supports the tank body 1 at the bottom. In the present invention, the base plate 10 is configured to be movable, and as shown below, the storage tank T can be transferred as a whole.

  The tank body 1 has a flat bottom cylindrical tank shape with a dome-shaped roof, and is suitable for directly storing LNG requiring high safety.

  As shown in the figure, a tank body 1 according to an embodiment of the present invention includes a side plate portion 2, a roof portion 3, and a bottom plate portion 4. The side plate portion 2 includes an outer tank side plate 6, an inner tank side plate 7, and a heat insulating layer 8 such as glass wool or pearlite filled between the outer tank side plate 6 and the inner tank side plate 7.

  The roof portion 3 is laid on the ceiling deck 12 and the dome-shaped outer tub roof plate 11 and the outer tub roof bone 13 which are joined to the top of the outer tub side plate 6, and the ceiling deck 12 suspended from the hanger 21. It consists of a heat insulating layer 17 such as glass wool.

  The bottom plate portion 4 is laid between the outer tank bottom plate 14 that forms the bottom plate of the outer tank side plate 6, the inner tank bottom plate 15 that forms the bottom plate of the inner tank side plate 7, and the outer tank bottom plate 14 and the inner tank bottom plate 15. And the bottom cold insulation layer 16. For the bottom cold insulation layer 16, foam glass, pearlite concrete, or the like is preferably used. The deck 12 is suspended from the outer tank roof bone 13. The inner tank side plate 7 and the base plate 10 are connected by an anchor strap 20 and play a role of suppressing the floating of the inner tank side plate 7 during sea transportation. For the metal of the inner tank side plate 7 and the inner tank bottom plate 15, nickel steel or the like whose low temperature toughness is ensured is preferably used.

  The tank body 1 having the above configuration has been conventionally constructed by on-site construction by an operator, but in the present invention, the storage tank T is constructed and modularized on a foundation plate 10 cast and formed in a factory. Is what you get.

  FIG. 2 shows the means from the casting of the base plate 10 and the construction of the storage tank to the transportation, and FIG. 3 is a plan view of FIG. 2 (d).

  In FIG. 2 (a-1), a concrete foundation 19 is constructed in advance in the factory, and a large number of pedestals 18 project from the concrete foundation 19, and a reinforcing bar 33 embedded in the foundation version 10 is placed thereon. (See FIG. 1). As shown in FIG. 3, the pillars 18 are arranged in the same direction, at equal intervals on the left and right sides, and in a straight line in the vertical direction. The space between the pillars 18 is filled with a soil material such as soil, silicon soil, resin powder, or the like, which becomes the foundation 32 for placing the concrete, and is compacted. It is preferable to apply mortar (not shown) as a release material to the surface of the base 32 and the surface of the pedestal 18.

  As shown in FIG. 2 (a-2), the slab mold 50 and the support 51 are used as the means for placing and molding the base plate 10 in addition to the means for filling the soil material as described above. It is also possible to use either means of FIG. 2 (a-1) or FIG. 2 (a-2).

  Next, as shown in FIG. 2B, concrete is placed on the base 32 and cured and cured to form the base plate 10. A reinforcing bar joint 33 is embedded in the base plate 10.

  Next, as shown in FIG. 2C, the base 32 is removed by water jet or the like. In the case of the means shown in FIG. 2 (a-2), the slab formwork 50 and the support work 51 are removed. As a result, a space 35 is created in the lower portion of the base plate 10. This completes preparation for constructing the tank body 1.

Next, as shown in FIG. 2 (d), on the foundation plate 10, to construct a tank body 1 as shown in FIG. 1, more secure the bottom of the tank body 1 to the anchor bolt to the base plate 10. The inner tank side plate 7 is fixed to the base plate 10 by an anchor strap 20. In this way, the storage tank T composed of the tank body 1 and the base plate 10 is constructed in the factory, and the completed storage tank T is transported to the installation site as follows.

  To move the storage tank T, as shown in FIGS. 2 (d) and 3, a plurality of trolleys 36 with jacks (for example, SPMT) are set in a space 35 below the foundation plate 10, and the foundation plate 10 is used with a jack. Is lifted off from the pedestal 18 and in this state, the carriage 36 is driven in the direction of the arrow 39 in FIG. 3 and transferred to a desired place such as a harbor.

FIG. 4 is an explanatory diagram for carrying the storage tank T into the floating body 63 such as a barge ship at sea.

  When the floating body 63 approaching the landing site 61 becomes flush with the landing site 61 due to a full tide, the transfer plate 62 is transferred to the landing site 61 and the floating body 63, and the carriage with the jack 36 supporting the storage tank T together with the floating body 63. Then, it is transported by sea to a dock at an overseas installation site by a tug 44 and then transferred to the installation site by a truck 36 with a jack as it is.

  FIGS. 5 and 6 are cross-sectional views showing steps of construction of the storage tank at the installation site according to the first embodiment and the second embodiment, respectively, and FIG. 7 is a plan view of the storage tank after installation is completed. At the installation site, when the storage tank is brought in, the site work necessary for storage tank installation, such as foundation work, has been completed, and the storage tank T is installed there. Hereinafter, the construction means of the storage tank at the installation site will be described.

  FIG. 5 is a construction example of the first embodiment.

  As shown in FIG. 5 (a), a concrete foundation 41 is constructed on a concrete pile 40 at the installation site, and a number of pedestals 42 project from the concrete foundation 41. It is assumed that the storage tank T is transported to the installation site as described above.

  As shown in FIG. 5 (b), the carriage 36 with the jack is carried into the space between the pillars 42, the foundation plate 10 is moved onto the pillars 42, and the jack is lowered so that the foundation plate 10 is moved to the leg. Place on the pillar 42. Finally, the carriage 36 with the jack is moved away in the direction of the arrow 80 in FIG. 7 to complete the installation of the storage tank T as shown in FIG. It is also possible to construct a breakwater around the storage tank T if necessary.

  FIG. 6 is a construction example of the second embodiment.

  As shown in FIG. 6A, a concrete foundation 41 is constructed on a concrete pile 40 at the installation site, and a large number of reinforcing bar joints 43 project from the concrete foundation 41.

  As shown in FIG. 6 (b-1), the carriage with jack 36 is carried to a predetermined position in the space between the reinforcing bar joints 43, the reinforcing bar joint 44 is connected to the lower surface of the foundation plate 10, and the reinforcing bar of the concrete foundation 41. The joint 43 is overlapped. At this time, it is also possible to set a temporary receiving high-pressure jack 60 having an up-and-down lifting function at the base height, or to use the jack-equipped carriage 36 as it is instead of a support work. All the remaining reinforcing bars around the reinforcing bar joints 43 and 44 are constructed, and the concrete is placed by surrounding with the formwork to form the column base 46.

  Next, after the pedestal 46 is hardened, as shown in FIG. 6C and FIG. Moreover, as shown in FIG.6 (b-2), when the high voltage | pressure jack 60 is used, a jack is taken down and removed.

  As shown in FIG. 6 (d), if additional column bases are required for strength, after the trolley with jack is moved, the remaining reinforcing bars such as tie bars are placed around the reinforcing bars 52 and 53 shown in FIG. 6 (c). It is also possible to lay and form a new pedestal 47.

FIG. 8 is a diagram showing a third embodiment in which a crane is used for transportation of a storage tank, and FIG. 9 is a construction of the storage tank.
8A, a reinforcing bar 70 is constructed on the leveled concrete 72 in the factory, and a foundation plate 10 is constructed at the location of the reinforcing bar 70 as shown in FIG. 8B. The tank body 1 is constructed and the storage tank T is completed. Then, the storage tank T is lifted by the crane 71, placed on the jack-equipped carriage 36, and placed on the floating body 63 and transported to the installation site in the same manner as in the above embodiment. As described above, in the third embodiment, the crane 71 is placed on the jack truck 36, so that the space 35 for retracting the jack truck 36 is not required as in the first and second embodiments. 18 construction is also unnecessary.

  As shown in FIG. 9 (a), leveling concrete 73 is applied to the installation site where the ground has been improved, and as shown in FIG. 9 (b), it is installed with a truck 36 with a jack as in the above embodiment. Transport the storage tank T to the site. As shown in FIG. 9C, the transported storage tank T is lifted by the crane 71 and installed on the leveled concrete 73 as it is. As described above, in the third embodiment, since the construction is directly performed on the leveling concrete 73 by the crane 71, the space for evacuation of the carriage 33 with the jack is not required as in the first and second embodiments, and the pedestal 42 No need for construction.

  In the above embodiment, the storage tank is transported by the floating body 63 in a state where the storage tank is directly placed on the jack truck 36, but the storage tank is transported to the top of the floating body 63 while being placed on the jack truck 36, It is also possible to carry it by sea as it is, or to carry it by sea with the storage tank T placed on a cradle (not shown) or the like, with the jack truck retracted.

  As described above, according to the storage tank construction apparatus of the embodiment of the present invention, the modular storage tank T composed of the base plate 10 and the tank body 1 is placed on the sea in a state where the storage tank T is placed on the truck 36 with a jack. Since it is transported, transferred to the installation site, and installed on the pedestal 42 on the concrete foundation 41 already installed at the installation site, it becomes possible to perform civil engineering work at the construction site in parallel with the tank machine work at the factory. This makes it possible to start mechanical work without being affected by delays in civil engineering work. Thereby, it is possible to disperse the risk of delay in construction due to unsatisfactory weather at the construction site, and shorten the overall construction period. Therefore, the storage tank construction apparatus according to the present embodiment can respond to the demand for LNG that is diversified all over the world, has a short construction period, and can be installed on site.

  As mentioned above, although this invention was demonstrated in detail using drawing, this is one Embodiment of this invention, and this invention is not limited by this embodiment.

  The storage tank construction apparatus of the present invention is not limited to a cryogenic liquid storage tank such as liquefied natural gas (LNG) (for example, API 625 single containment tank type), but is a similar flat bottom cylindrical storage tank such as oil storage. It can also be applied to construction.

DESCRIPTION OF SYMBOLS 1 Tank main body 2 Side board part 3 Roof part 4 Bottom board part 6 Outer tank side board 7 Inner tank side board 10 Foundation version 18 Leg pillar 19 Concrete foundation 20 Anchor strap 36 Carriage 41 with a jack 41 Concrete foundation 42, 46 Leg pillar
43, 44 Reinforced joint T storage tank

Claims (3)

Provided on the base plate cast and molded in the factory, cylindrical outer tank side plate and inner tank side plate, roof part provided on the upper part of the outer tank side plate, lower part of the outer tank side plate and inner tank side plate A storage tank constructed by constructing an anchor strap for connecting the bottom plate portion, the inner tank side plate and the base plate,
Means for transporting the storage tank to the installation site in a state where the lower surface of the foundation plate is supported by a plurality of trucks with jacks;
Multiple loading the jack carriages in a state of supporting the storage tank into a plurality of spaces defined between the plurality of vertical posts which project linearly in the same direction on the construction and concrete foundation to the installation site And means for placing a basic version of the storage tank on the pedestal;
Means for moving a plurality of the carriages with jacks in the same direction toward the outside of the foundation plate after the foundation plate is placed. Provided on the base plate cast and molded in the factory, cylindrical outer tank side plate and inner tank side plate, roof part provided on the upper part of the outer tank side plate, lower part of the outer tank side plate and inner tank side plate A storage tank constructed by constructing an anchor strap that connects the bottom plate portion, the inner tank side plate and the base plate,
Means for transporting the storage tank to the installation site in a state where the lower surface of the foundation plate is supported by a plurality of trucks with jacks;
Multiple loading the jack carriages in a state of supporting the storage tank into a plurality of spaces defined between the plurality of reinforcing bars couplings which protrude linearly in the same direction on the construction and concrete foundation to the installation site Means to
Using the jack of the truck with the jack or the high-pressure jack as a supporting work, means for constructing the remaining reinforcing bars in the reinforcing bar joints of the reinforcing bars connected to the lower surface of the foundation plate and the concrete foundation,
Means for forming a plurality of pedestals in a straight line in the same direction by placing concrete surrounded by a mold around the reinforcing bar joint;
After the column bases satisfies the required strength, storage tanks, characterized by comprising a means for leave in the same direction towards a plurality of the jacks carriages or of the high-pressure jacks outwardly of the foundation plate Construction equipment. 3. The storage tank construction apparatus according to claim 1, wherein the truck with a jack is an SPMT.

Images