TW202031985A - Structure for fixing temporary support - Google Patents

Abstract

The object of the present invention is to facilitate the work of removing temporary supports at a high place and to reduce labor burden of an operator than before. The present invention relates to a structure for fixing a temporary support (5) for construction to an outer tank (3) when constructing a double-shell tank comprising an inner tank and the outer tank. The structure of the present invention includes: an embedded metal member (14) embedded in the concrete forming a side wall (4) of the outer tank (3); a female threaded member (15) (a fastening part) connected to the embedded metal member (14); a temporary support (5) detachably fixed to the female threaded member (15); and a bolt (16) (a fastening tool) for fixing the temporary support (5) to the female threaded member (15).

Description

Temporary support fixed structure

The present disclosure relates to a temporary support fixing structure for the temporary support used in construction when a double-shell tank consisting of an inner tank and an outer tank is fixed to the aforementioned outer tank.

Generally, a double-shell tank with an inner tank and an outer tank is used for storage of cryogenic liquids such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas). When constructing such a double-shell tank, in order to shorten the construction period required for the construction of the tank, generally, the metal inner tank and the concrete outer tank are simultaneously constructed.

More specifically, after the side wall of the outer tank is assembled to a certain height, the jack raising device is installed on the side wall through temporary supports, and the inner tank eaves are gradually raised by the jack raising device, while the inner tank side plate Those from the uppermost section are sequentially added from the bottom below the eaves of the inner trough. And, during the ascending process of the inner trough eaves, the outer trough eaves are assembled on the inner trough eaves.

In addition, the prior art literature information related to the simultaneous construction technology of the inner tank and the outer tank in this double-shell tank barrel already has the following Patent Document 1 and the like. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 5732262

[The problem to be solved by the invention]

However, in the prior art, the temporary support is fixed by welding to the embedded metal part embedded in the concrete constituting the structure of the side wall of the outer tank, and the jack lifting device is connected to the temporary support by bolts or the like. , In this case, the temporary support member will protrude greatly from the side wall of the outer groove. Therefore, it is necessary to cut and remove the gas (acetylene) at a high place after the use of the aforementioned temporary support, which has a problem that the labor burden of the operator is large.

Here, the temporary support fixing structure of the present disclosure is based on the fact that it can facilitate the removal of the temporary support in a high place and can reduce the labor burden of the operator more than before. [Technical means to solve the problem]

The temporary support fixing structure of the present disclosure is a structure in which the temporary support used for construction is fixed to the outer tank when constructing a double-shell tank consisting of an inner tank and an outer tank, and has: The embedded metal fittings in the concrete of the structure of the side wall of the tank, the joint part connected to the embedded metal fittings, and the temporary support fixed to the joint part to be detachable, and the temporary support is fixed to The bonding tool of the aforementioned bonding part.

In addition, in the temporary support fixing structure, the embedded metal fitting includes: a base support plate arranged on the inner periphery of the side wall of the outer tank, and a back surface of the base support plate connected to the base support plate and embedded in The anchor bolts in the concrete of the aforementioned side wall are preferable.

Furthermore, in the provisional support fixing structure, the coupling portion is embedded in the concrete of the side wall in a state of being screwed with the anchor bolt and welded to the base pallet in accordance with the bolt hole A female threaded member with a threaded hole in the blind alley formed continuously with the bolt hole is preferred.

In addition, in the aforementioned temporary support fixing structure, the aforementioned temporary support may be a jack support for constructing the aforementioned inner tank. [Effects of the invention]

According to the temporary support fixing structure of the present invention described above, the removal work of the temporary support at a high place can be facilitated, and the labor burden of the operator can be reduced more significantly than before.

Hereinafter, the form of the embodiment of the present invention in this disclosure will be described with reference to the attached drawings.

Figures 1 to 6 show an embodiment of the temporary support fixing structure of the present disclosure. As shown schematically in Figure 6, when constructing cryogenic liquids such as LNG (liquefied natural gas) and LPG (liquefied petroleum gas) In the case of the storage of the double-shell tank barrel 1, in order to achieve the purpose of shortening the construction period, the metal inner tank 2 and the concrete outer tank 3 are simultaneously constructed. That is, the jack raising device 6 is installed on the side wall 4 of the outer tank 3 assembled to a certain height through the temporary support 5, and the inner tank eaves 7 are raised step by step by the jack raising device 6 while passing through The bracket 8 adds the side plate 9 of the inner tank below the eaves of the inner tank 7 from the uppermost part in order from below.

Here, the jack lifting device 6 is, for example, a center hole jack that can lift the hanging portion 10 attached to the curved outer peripheral surface of the toggle plate 8 through a jack lifting rod 11. In addition, the symbol 12 in FIG. 6 is a temporary assembly stand for assembling the inner tank side plate 9, and the symbol 13 is an anchor band of the inner tank 2 previously installed under the assembly stand 12.

When constructing such a double-shell tank barrel 1, when the temporary support 5 is fixed to the outer tank 3 as a jack support, the feature of this embodiment is that the details shown in Figs. 1 to 5 are used. Temporarily set up the point of the fixed structure of the support. More specifically, the embedded metal fitting 14 is embedded in the concrete constituting the structure of the side wall 4 of the outer tank 3, and the temporary support 5 is fixed by bolts 16 (bonding tool) so as to be opposed to the embedded metal The female screw member 15 (joining part) connected by the member 14 is detachable.

Here, the embedded metal fitting 14 includes: a base pallet 17 arranged on the inner periphery of the side wall 4 of the outer tank 3, and a back surface of the base pallet 17 connected to and embedded in the side wall 4 The structure of the concrete anchor bolt 18. The base support plate 17 is a rectangular plate and is arranged along the inner peripheral surface of the side wall 4, and the anchor bolt 18 is buried at right angles (horizontally) into the inner circumference of the side wall 4 of the outer tank 3 surface.

In particular, as shown in detail in FIG. 4, the connection of the anchor bolt 18 on the back of the base plate 17 is achieved by being embedded in the concrete of the side wall 4 while being screwed with the anchor bolt 18. A female screw member 15 having a threaded hole 20 of a blind alley formed continuously with the bolt hole 19 is welded to the back surface of the aforementioned base plate 17 in accordance with the bolt hole 19 for connection.

That is, the aforementioned female screw member 15 has a screw hole 20 and a screw hole 21 having a dead end at both ends in the longitudinal direction. In addition, the bolt 16 (connecting tool) that passes through the bolt hole 23 of the mounting bracket 22 of the temporary support 5 is screwed into the one threaded hole 20, and the bolt 16 is connected to the female screw member 15 The temporary support 5 is fixed to the base support plate 17. In addition, the aforementioned anchor bolt 18 is screwed into the other screw hole 21.

And in the example shown in the figure, the anchor bolt 18 of the upper two stages is relatively longer than the anchor bolt 18 of the lower stage, and in the front end portion of the anchor bolt 18 of the upper two stages, A direction at right angles to the longitudinal direction of the anchor bolt 18 forms a flat fixing plate 24. That is, to strengthen the ability to withstand the removal force, even if the load applied during the lifting operation of the jack due to the installation of the jack lifting device 6 (refer to Figure 6) on the temporary support 5, the strong removal force acts on the upper two stages The anchor bolt 18 of the upper two sections can also withstand it.

Furthermore, the two lowermost positions of the mounting bracket 22 are shown in detail in Figure 5, by directly screwing bolts 27 through the bolt holes 26 of the mounting bracket 22 into the side of the base bracket 17 The screw hole 25 is fixed. However, the cap 28 is welded to the back surface of the threaded hole 25 formed on the side of the base bracket 17, and the threaded hole 25 is hermetically sealed by the cap 28.

In addition, the outer tank side plate 29 made of steel slabs is assembled on the inner peripheral surface of the concrete constituting the side wall 4 of the outer tank 3. In this case, the concrete can be used as a formwork when grouting. . Here, the base support plate 17 is arranged so as to be exposed from the opening 30 formed in the outer tank side plate 29, and the opening 30 and the outer edge portion of the base support plate 17 are airtightly welded.

On the other hand, the temporary support 5 is provided with a pair of beams 31 made of I-shaped steel that protrude from the mounting bracket 22 connected to the base bracket 17 by the bolts 16 toward the inside of the tank. On both side surfaces of the beam 31, a plurality of beam members 32 serving as a work space (scaffold) project in a horizontal direction that is at right angles to the projecting direction of the beam 31.

And in the width direction center and both sides of the base plate 17 of the temporary support 5, ribs 33 extending in the up and down direction are formed, so that the strength can be improved so that it can withstand when the temporary support 5 is installed The load applied by the jack raising device 6 during the jack raising operation.

Then, in this case, overlap the mounting bracket 22 of the temporary support 5 on the front surface of the base bracket 17 and align the positions of the bolt holes 19, 23 with each other, and pass the bolt 16 through the bolt holes 19, 23 and Screw in the threaded hole 20 of the female threaded member 15 to fix the temporary support 5 to the base support plate 17, and install the jack raising device 6 on the temporary support 5 to perform jack raising operations. At this time, if the two lowermost positions of the mounting pallet 22 are connected to the threaded holes 25 on the side of the base pallet 17 with bolts 27, the fixing can be reinforced.

And after the jack raising operation using the jack raising device 6 is completed, when the temporary support 5 is removed, only the bolts 16, 27 are loosened and removed to release the temporary support 5 from the aforementioned base plate 17 The temporary support 5 can be easily removed from the aforementioned base support plate 17 by fixing it.

Therefore, according to the above embodiment, the aforementioned temporary support 5 is detachably coupled to the female screw member 15 of the embedded metal member 14 buried in the concrete constituting the side wall 4 of the outer tank 3. After the support 5 is used, it can be removed without gas cutting, so the removal work of the temporary support 5 at a high place can be facilitated and the labor burden of the operator can be reduced more than before.

Furthermore, in the case of this embodiment, the embedded metal fitting 14 includes: a base support plate 17 arranged on the inner circumference of the side wall 4 of the outer tank 3, and a back surface of the base support plate 17 connected and secured The anchor bolt 18 is embedded in the concrete of the aforementioned side wall 4. With such a structure, the foundation pallet 17 can be strongly and stably supported by the anchor bolts 18 deeply embedded in the concrete of the side wall 4.

And the joint for fixing the temporary support 5 is made into the concrete embedded in the side wall 4 in the state where the anchor bolts 18 are screwed together and welded to the base pallet in line with the bolt holes 19 A female screw member 15 having a threaded hole 20 of a blind alley formed continuously on the back of the bolt hole 19.

With such a structure, after the bolt 16 is removed, the airtightness of the base support plate 17 can be ensured by the threaded hole 20 of the blind alley, and the base support plate 17 can be directly used as a part of the outer groove side plate 29 , After the work is completed, there is no need to apply additional filling plate setting work in order to maintain air tightness.

In addition, the joint portion for fixing the temporary support 5, that is, the female threaded member 15, can be incorporated into a part of the embedded metal fitting 14 and be well embedded in the concrete of the side wall 4, and can also contribute to the foundation The pallet 17 and the aforementioned anchor bolt 18 are connected.

In this embodiment, the temporary support 5 is used as a jack support for constructing the inner tank 2 (refer to Fig. 6). With such a structure, the aforementioned temporary support 5 can be easily fixed and removed, and the inner channel eaves 7 of the jack lifting device 6 installed through the temporary support 5 can be used efficiently (in the progress of the process) The later stage also includes the jack-up operation of the stage of the outer tank eaves.

In addition, although the above description is about the case in which the outer tank side plate 29 is assembled on the inner peripheral surface of the concrete constituting the structure of the side wall 4 of the outer tank 3, which also has the formwork for grouting the concrete, it is based on the construction of the double-shell tank 1 In the method of construction, there are cases where concrete blocks are made and piled up to become the side walls 4 of the outer tank 3. In this case, the temporary support 5 is attached to a part of the concrete block through the embedded metal fitting 14 and the female screw member 15 embedded in advance, and the above-mentioned lifting operation such as a jack is performed. The temporary support 5 is After the removal, the inside of the steel filling plate is pasted into the outer groove side plate 29.

Therefore, in the case of a construction method performed by such a program, the female screw member 15 having the threaded hole 20 of the blind alley may not be used as the coupling portion. For example, as shown in another embodiment in Fig. 7, a sleeve-shaped female screw member 15' in which female threads 20' and 21' are formed at both ends in the longitudinal direction and opened in the longitudinal direction can be used.

That is, in the case of using the aforementioned sleeve-shaped female threaded member 15', each time the temporary support 5 is removed after use, by loosening and removing the bolts 16 the aforementioned female threaded member 15' If the inside of the base plate is opened, the airtightness of the base plate 17 itself cannot be maintained. However, because the steel filler plate is internally pasted and built into the outer tank side plate 29 in the subsequent process (refer to the two-dot dashed line in Figure 7), the aforementioned base plate 17 can be covered by the outer tank side plate 29. Can maintain air tightness.

And in this embodiment, the aforementioned temporary support 5 is detachably coupled to the female screw member 15' of the embedded metal fitting 14 buried in the concrete constituting the structure of the side wall 4 of the outer tank 3. In this temporary The point that the support 5 can be removed without gas cutting after use is the same, and the removal work of the temporary support 5 at a high place can be facilitated and the labor burden of the operator can be reduced more than before.

Moreover, the temporary support fixing structure of the present invention is not limited to the above-mentioned embodiments described in the present disclosure. The temporary support is not limited to the jack support. Others, of course, can be used without departing from the essence of the present invention. Add various changes.

1: Double shell tank 2: inner slot 3: Outer slot 4: sidewall 5: Temporary support 6: Jack lifting device 7: Inner groove eaves 8: Elbow support 9: Inner groove side plate 10: Hanging part 11: Jack rising rod 12: Assemble the stand 13: Anchor strap 14: Buried metal parts 15: Female threaded member (joint part) 15’: Female threaded member (joint part) 16: Bolt (combination tool) 17: Base plate 18: Anchor bolt 19: Bolt hole 20: threaded hole 20’,21’: Female thread 21: threaded hole 22: Install the pallet 23: Bolt hole 24: Fuser board 25: threaded hole 26: Bolt hole 27: Bolt 28: Cap 29: Outer groove side plate 30: Opening 31: beam 32: beam member 33: rib

[Figure 1] A schematic diagram showing an embodiment of the present disclosure. [Figure 2] The arrow view in the direction of II-II in Figure 1. [Figure 3] A cross-sectional view taken from the arrow III-III in Figure 2. [Figure 4] A detailed cross-sectional view of the female threaded member in Figure 1 is shown. [Figure 5] A detailed cross-sectional view of the cap in Figure 1 is shown. [Figure 6] An explanatory diagram of the jack-up work performed by the jack-up device. [Figure 7] A cross-sectional view showing another embodiment of the present disclosure.

3: Outer slot

4: sidewall

5: Temporary support

14: Buried metal parts

15: Female threaded member (joint part)

16: Bolt (combination tool)

17: Base plate

18: Anchor bolt

22: Install the pallet

24: Fuser board

27: Bolt

28: Cap

29: Outer groove side plate

30: Opening

31: beam

32: beam member

33: rib

Claims (4)

A temporary support fixing structure, It is a structure that fixes temporary supports for construction to the aforementioned outer tank when constructing a double-shell tank consisting of an inner tank and an outer tank. It has: Embedded metal fittings embedded in the concrete constituting the structure of the side wall of the outer tank, and The joint part connected with the buried metal piece, and A temporary support that is fixed so as to be detachably attachable to the joint, and The temporary support is fixed to the coupling tool of the aforementioned coupling part. Such as the temporary support fixing structure of claim 1, in which, The embedded metal fitting includes a base pallet arranged on the inner periphery of the side wall of the outer tank, and an anchor bolt connected to the back surface of the base pallet and embedded in the concrete of the side wall. Such as the temporary support fixing structure of claim 2, in which, The joint part is embedded in the concrete of the side wall in the state of being screwed with the anchor bolt and welded to the back of the base pallet in line with the bolt hole, and has a blind alley formed continuously with the bolt hole Female threaded member of threaded hole. 2 or 3 temporary support fixing structure, of which, The aforementioned temporary support is a jack support used to construct the aforementioned inner tank.

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