JP4095953B2 - Anchor device and method of using the anchor device - Google Patents

Description

The present invention relates to an anchor device and a method of using the anchor device.

  For example, as a method of installing a roof of a ground tank, an air lasing method is known in which a roof assembled in a tank is raised by the pressure of air supplied under this roof, and a conventional example when performing an air lasing method Is shown in FIGS.

  FIG. 4 shows a case where the above ground tank is a double shell tank. In the figure, 1 is a concrete bottom plate, 2 is a concrete side wall made upright on the bottom plate 1, and 3 is laid on the bottom plate 1. The outer tank bottom plate 4 is an outer tank side plate pasted on the inner periphery of the side wall 2, and 5 is an outer tank roof assembled at the bottom of the tank inner space 6 formed by the outer tank bottom plate 3 and the outer tank side plate 4, 7 Similarly, an inner tank roof assembled at the lower part of the outer tank roof 5 in the tank inner space 6, and a connecting member 8 for connecting the outer tank roof 5 and the inner tank roof 7.

  Reference numeral 9 denotes an anchor device arranged at the center of the outer tank bottom plate 3 in order to fix the lower end of the air-raising balance wire 10 provided on the upper surface of the outer tank bottom plate 3. As shown in FIGS. 5 and 6, the anchor device 9 includes a substrate 11 that can be fixed to the upper surface of the outer tank bottom plate 3 by welding, column members 12 erected at the four corners of the substrate 11, and each column member. The wire fixing member 13 has a horizontal cylindrical shape fixed so as to connect the wire 12, and the lower ends of a total of about 30 balance wires 10 are fixed to the four wire fixing members 13. Yes.

  The plurality of balance wires 10 whose lower ends are fixed to the wire fixing member 13 of the anchor device 9 rise substantially straight in the tank inner space 6, pass through holes provided in the inner tank roof 7 and the outer tank roof 5, and It extends to above the tank roof 5, is wound around a sheave 14 disposed on the upper surface of the outer tank roof 5, and is seen in plan view as a whole outward in the radial direction of the outer tank roof 5 along the upper surface of the outer tank roof 5. Is extended radially, and is guided by the sheave 15 to extend to the vicinity of the outer edge of the outer tub roof 5, wound upward by the sheave 16 disposed near the outer edge of the upper surface of the outer tub roof 5, and upwards. It extends upward along the inner periphery of the outer tank side plate 4, is guided by the sheaves 17 and 18, and its end is fixed to the upper end of the side wall 2.

  Reference numeral 19 denotes a blower, and the air 20 supplied from the blower 19 is introduced into the tank internal space 6 from a pipe 21 or the like. In FIG. 5, 22 is a weight such as a concrete piece.

  When the outer tank roof 5 and the inner tank roof 7 are air-raised, as shown in FIG. 4, the outer tank roof 5 and the inner tank roof 7 are assembled in the tank inner space 6, and the anchor device 9 is placed on the outer tank bottom plate 3. The substrate 11 is welded to the outer tank bottom plate 3 and fixed. 4, the lower end of the wired balance wire 10 is fixed to the wire fixing member 13 of the anchor device 9, and the upper end side of the balance wire 10 is fixed to the upper end portion of the side wall 2.

  When the blower 19 is driven, the air 20 is supplied to the lower portion of the inner tank roof 7 of the tank inner space 6 through the pipe line 21 and the like. For this reason, the inner tub roof 7 and the outer tub roof 5 are air-raised while being guided by the balance wire 10 while being balanced by air pressure.

  At the time of airing, an upward load of about 1000 kg for a total of about 30 t acts on one balance wire 10. However, since the thickness of the outer tank bottom plate 3 is a thin plate of about 6 to 8 mm, the outer tank bottom plate 3 is lifted by an upward load. As a preventive measure, a weight 22 of about 30 t is installed on the upper surface of the outer tank bottom plate 3 in order to cancel the upward load. However, the weight 22 is removed after air lasing of the inner tank roof 7 and the outer tank roof 5. There must be.

  The anchor device 9 may be fixed not to the outer tank bottom plate 3 but to the inner tank bottom plate (not shown).

Further, there is Patent Document 1 as a prior art document in which the tank roof is air-raised. In patent document 1, the weight balance apparatus used when air-raising a roof is provided. Thus, the weight balance device is provided with a pedestal frame that projects to the inside and outside of the tank at the required height above the side wall corresponding to the position where the local heavy object is mounted on the roof. Or, standing up from the ground, attaching sheaves to the inner and outer ends of the gantry frame, and sequentially passing the intermediate portion of the wire rope with one end connected to the local heavy object on the roof to the sheave, and A counterweight having a weight substantially equal to the load of the local heavy object is suspended from the other end of the wire rope.
JP 2000-17878 A

  However, in the case of the tank shown in FIGS. 4 to 6, it takes time to install and remove the weights 22, and there is a risk of increasing the construction period and increasing the cost. Takes a long time to install and remove, and in this case as well, there is a possibility that the construction period will be prolonged and the cost will be increased.

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention aims to provide an anchor device and a method of using the anchor device that can shorten the construction period and reduce the cost without requiring the installation or removal of a weight or a weight balance device. It has been done.

Anchor device according to claim 1, the sleeve screwed to the upper end of the anchor bolt embedded within concrete deck slab, the build-up bolt upper end protruding upward from the upper surface of the bottom plate, the roof air The anchor body including a wire fixing member that is screwed into the sleeve so that it can be removed from the sleeve after the end of the lasing, and that fixes the balance wire that guides the roof when the roof is air-raised, is added to the anchor. It is fixed to the upper surface of the bottom plate with bolts and nuts so that it can be removed after air-raising of the roof .

  In the anchor device of claim 2, a concrete edge cutting material embedded in the bottom plate is externally fitted to the extension bolt, and in the anchor device of claim 3, the lower end of the concrete edge cutting material is located at the upper end of the sleeve. The upper end is substantially the same as the upper surface of the bottom plate.

According to a fourth aspect of the present invention, there is provided a method of using the anchor device comprising: a plurality of foundation bolts; a sleeve externally fitted to an upper end of the foundation bolt; and a sleeve detachably attached to the sleeve so as to be positioned above the foundation bolt. A plurality of the extension bolts are installed, a positioning template is attached to the template bolts connected to the plurality of extension bolts via sleeves, and concrete is placed in the formwork to form the foundation bolts. The sleeve, the portion below the upper end side of the extension bolt are embedded in the concrete, and after curing the cast concrete, the template and the template bolt and the sleeve to which the template bolt is screwed are removed, A balance wire that guides the roof during air-raising of the roof is fixed on the bottom plate formed by solidifying the concrete. An anchor body with a wire fixing member is established by the anchor body the build-up bolts and nuts, with fixed on the bottom plate, after air lasing of the roof is removed the anchor body from the bottom plate, the The extension bolt is removed from the sleeve .

In the method of using the anchor device of claim 5, a concrete edge cutting material is externally fitted to the extension bolt, and in the method of using the anchor device of claim 6, the upper end of the concrete edge cutting material is casted with concrete. When installed, it should be approximately the same as the top surface of the concrete.

According to the anchor device and the method of using the anchor device according to claims 1 to 6 of the present invention, installation and removal of weights and weight balance devices are not required during air lasing of the tank roof, and field work is reduced. Therefore, the construction period can be shortened and a large-scale device is not required, so that the cost can be reduced. Further, the bolts have an additional structure, and after air raising, the anchor body and anchor device are fixed. Since the bolts are removed, the metal extension bolts are not exposed on the bottom plate when the tank is used. Therefore, it is possible to prevent cooling of the concrete bottom plate due to local cold leaks. It is possible to achieve an excellent effect that there is no risk of adverse effects.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIGS. 1 and 2 show an example of the anchor device of the present invention which replaces the conventional anchor device applied to the tank shown in FIG. Accordingly, the anchor device 31 of the illustrated example is installed on the upper surface of the bottom plate 1 on which the outer tank bottom plate 3 of the bottom plate 1 is not laid, and the bolts 32 are mostly embedded in the concrete bottom plate 1. And an anchor body 33 fixed to a portion of the extension bolt 36, which will be described later, protruding on the bottom plate 1.

  The bolts 32 are arranged at four locations, two at a location, and foundation bolts 34 embedded in the bottom plate 1 and sleeves 35 embedded in the bottom plate 1 and screwed into the upper ends of the foundation bolts 34. And an extension bolt 36 whose lower end is screwed into the sleeve 35 and whose upper end protrudes above the upper surface of the bottom plate 1, and embedded in the bottom plate 1 so that the upper surface is flush with the upper surface of the bottom plate 1. And a cylindrical concrete edge cutting material 37 that is externally fitted to the bolt 36 in a state.

  The anchor main body 33 is installed on the bottom plate 1, is connected to a bolt hole, is inserted through a bolt 36, and can be fastened through a nut 38, and a columnar member fixed on the substrate 39 by welding or the like. 40 and a cylindrical wire fixing member 41 horizontally installed so as to connect adjacent columnar members 40, and the lower end of the balance wire 10 is fixed to the wire fixing member 41.

  When the balance wire 10 is fixed to the wire fixing member 41 of the anchor main body 33 in the anchor device 31 of the illustrated example, for example, when the inner tank roof 7 and the outer tank roof 5 shown in FIG. 10 is transmitted from the wire fixing member 41 to the foundation bolt 34 via the columnar member 40, the substrate 39, the extension bolt 36, and the sleeve 35, and from the foundation bolt 34 to the bottom plate 1. For this reason, the upward load does not act on the outer tank bottom plate 3 at the time of air rising of the inner tank roof 7 and the outer tank roof 5, and the outer tank bottom plate 3 does not float.

  When the air-raising operation is completed, the anchor device 31 and the extension bolt 36 are removed, the concrete is filled into the sleeve 35 and the concrete edge cutting material 37, and the outer tank bottom plate is provided on the bottom plate 1 where the outer tank bottom plate 3 is not provided. 3 is installed.

  According to the illustrated example, when the inner tank roof 7 and the outer tank roof 5 are air-raised, it is not necessary to install or remove weights or weight balance devices, and the field work is reduced, thus shortening the construction period. In addition, a large-scale device is not necessary and the cost can be reduced.

  Further, since the bolts 32 have an additional structure and the additional bolt 36 is removed after air raising, the metal additional bolt 36 is not exposed on the bottom plate 1 when the tank is used. Therefore, the cooling of the concrete bottom slab 1 due to local cold heat leakage can be prevented, and there is no possibility of adversely affecting the bottom slab 1.

  Next, a procedure for installing the anchor device 31 of the illustrated example will be described with reference to FIG. Prior to placing concrete to build the bottom slab 1, bolts 32 are installed in the form frame in advance. That is, the foundation bolt 34 is arranged in a formwork for placing concrete, positioned and fixed to a reinforcing bar, etc., and the sleeve 35 is screwed to the upper end of the foundation bolt 34, and the sleeve 36 is joined to the bolt 35 and the bolt 36 is screwed. Then, a concrete edge cutting member 37 is externally fitted to the extension bolt 36, a sleeve 42 is externally fitted to the upper end of the extension bolt 36, a template bolt 43 is screwed to the sleeve 42, and the eight template bolts 43 are One template 44 is attached and fixed to the position of the horizontal position of the bolt 36 which is added to the upper end portion. The bolts 32 may be sequentially assembled on site as described above, or may be installed integrally in advance. In FIG. 3, 45 is a reinforcing material.

  When the installation of the bolts 32 is completed as shown in FIG. 3, concrete is placed so that the upper end side of the extension bolt 36 protrudes upward by a predetermined dimension. In FIG. 3, 1a is the upper surface of the placed concrete. Thus, when the concrete is placed and cured for a predetermined period, the template 44, the template bolt 43 and the sleeve 42 are removed, and the anchor body 33 shown in FIGS. 1 and 2 is placed on the bottom plate 1 as described above. Install and fix with bolts 36 and nuts 38.

Since the anchor device 31 is thus installed, the anchor main body 33 and the additional bolt 36 can be removed after the air raising of the inner tank roof 7 and the outer tank roof 5 as described above. Therefore, the extension bolt 36 is not exposed on the bottom plate 1 as described above, and cooling of the bottom plate 1 due to local cold heat leakage can be prevented.

In the anchor device and the method of using the anchor device of the present invention, the case where the anchor device is applied to a double shell tank has been described. However, the anchor device can also be applied to a tank other than the double shell tank, Of course, the present invention can be applied to an underground tank instead of a tank, and various modifications can be made without departing from the scope of the present invention.

It is a longitudinal cross-sectional view of an example of embodiment of the anchor apparatus of this invention, and is a II arrow direction view of FIG. It is an II-II direction arrow line view of FIG. It is a longitudinal cross-sectional view for demonstrating the usage method of the anchor apparatus of this invention. It is a longitudinal cross-sectional view which shows the general state in the case of air-raising the inner tank roof and outer tank roof of a tank. It is a cross-sectional front view of the anchor apparatus which supports the reaction force which acts on the balance wire at the time of air raising of the inner tank roof and outer tank roof shown in FIG. It is a VI-VI direction arrow directional view of FIG.

Explanation of symbols

1 Bottom plate 5 Outer tank roof (roof)
7 Inner tank roof (roof)
DESCRIPTION OF SYMBOLS 10 Balance wire 31 Anchor apparatus 32 Bolts 33 Anchor main body 34 Foundation bolt 35 Sleeve 36 Additional bolt 37 Concrete edge cutting material 38 Nut 41 Wire fixing member 42 Sleeve 43 Bolt for template 44 Template

Claims (6)

An extension bolt whose upper end protrudes upward from the upper surface of the bottom slab is removed from the sleeve screwed into the upper end of the foundation bolt embedded in the concrete bottom slab after the air raising of the roof is completed. obtained as screwed, the bottom plate is placed on the upper surface of the anchor body with a wire fixing member for fixing the balance wire to guide the roof when air lasing roof, the bottom plate upper surface by the build-up bolts and nuts The anchor device is fixed so that it can be removed after air-raising of the roof .   The anchor device according to claim 1, wherein a concrete edge cutting material embedded in the bottom plate is externally fitted to the extension bolt.   The anchor device according to claim 2, wherein the lower end of the concrete edge cutting material is located at the upper end of the sleeve, and the upper end is substantially the same as the upper surface of the bottom plate. In the form frame, a plurality of foundation bolts, a sleeve fitted on the upper end of the foundation bolt, and an extension bolt detachably screwed to the sleeve so as to be positioned above the foundation bolt are installed. A template for positioning is attached to a template bolt connected to a plurality of the extension bolts via a sleeve, and concrete is placed in the formwork, from the upper end side of the foundation bolt, sleeve, and extension bolt. On the bottom slab formed by solidifying the template, removing the template and the bolt for template and the sleeve into which the template bolt is screwed after curing the placed concrete. An anchor body with a wire fixing member that fixes the balance wire that guides the roof during air lasing of the roof The installation to the build-up bolts and nuts the anchor body, and fixed on the bottom plate, after air lasing of the roof, as well as remove the anchor body from the bottom plate, that removing the build-up bolt from the sleeve How to use the anchor device as a feature. The method of using the anchor device according to claim 4, wherein a concrete edge cutting material is fitted on the extension bolt. The method of using the anchor device according to claim 5, wherein the lower end of the concrete edge cutting material is positioned at the upper end of the sleeve, and the upper end is substantially the same as the upper surface of the concrete when the concrete is placed.

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