JP2016050644A - Method of constructing penetration pipe of building wall, and penetration pipe jig used for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of constructing a penetration pipe of a building wall enabling a worker to monitor a work state and construct while simply sealing inner and outer walls, during the insertion construction of a through-hole or a pipe; and a penetration pipe jig used for the method.SOLUTION: A penetration pipe jig 30 has a bottom flange 31, a main cylinder 32 provided with a transparent connection plate 34 at a top portion, a connection flange 35 connected to the connection plate 34 of the main cylinder 32, and a sub cylinder 33 provided with a transparent top plate 36 at a top portion. By using the penetration pipe jig 30, a through-hole and a water injection pipe are constructed on a concrete wall.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a building wall through pipe construction method for constructing a pipe for pouring water into a reactor well or the like in a reactor building by penetrating the building wall, and a through pipe jig used therefor.

  FIG. 6 shows the reactor building 10, and the reactor containment vessel 11 that accommodates the reactor pressure vessel is accommodated in a concrete body 12 that constitutes the reactor building 10. A suppression chamber 14 is formed on the outer periphery of the pedestal 13 that supports the reactor containment vessel 11. A reactor well 15 that cools the top of the reactor containment vessel 11 when a severe accident occurs is formed on the top of the reactor containment vessel 11. It is formed. A spent fuel storage pool 16 and an equipment temporary storage pool 17 are provided on the outer peripheral side of the reactor well 15.

  FIG. 5 shows a water injection system to the spent fuel storage pool 16, and various water injection systems 18 are connected to the spent fuel storage pool 16. The water injection system 19 to the reactor well 15 is also used to inject water using the water injection system 18 to the spent fuel storage pool 16, but considering that water injection in these water injection systems 18 becomes impossible. The reactor building 10 and the water injection system 19 to the reactor well 15 are connected by a water injection pipe 20, and a water supply hose 23 of a portable pump (fire engine) 22 is connected to the connection port 21. Construction and construction of a piping system that can inject water into the reactor well 15 through the water injection system 19 is being studied.

  In order to construct a piping system for injecting water from outside the reactor building 10 to the reactor well 15, it is necessary to construct and construct the water injection piping 20 through the outer wall 10 o and the inner wall 10 i of the reactor building 10.

JP 2013-204699 A JP 2011-149704 A

  By the way, in order to construct and construct the water injection pipe 20, it is necessary to form the through holes 25 in the outer wall 10 o and the inner wall 10 i of the reactor building 10 and to pass the water injection pipe 20 through the through holes 25.

  However, the inside of the reactor well 15 is a radioactive region, and is kept at a negative pressure with respect to the external air pressure so that the radiation does not leak to the outside. The through-hole 25 is formed on the outer wall 10o and the inner wall 10i from either the inner or outer direction. However, if the negative pressure collapses, there is a problem that radioactivity leaks.

  For this reason, when inserting a through hole or a pipe, do one of the following: boring work by covering one wall at the position where the through hole is to be drilled with a sealing cover, or covering the through hole with a sealing cover and passing the pipe. However, it is difficult to grasp the work situation.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and in a building wall through-pipe construction method, the work state can be monitored and the inner and outer walls can be easily sealed while inserting a through-hole or a pipe. And it is providing the penetration piping jig used for this.

  In order to achieve the above object, the present invention provides a building wall through pipe construction method for boring a through hole in a concrete wall and inserting a water injection pipe into the through hole. Configure the through-pipe jig, fix the through-pipe jig to one of the concrete walls forming the through-hole, and form the through-hole from the other concrete wall to the through-pipe jig fixed to the concrete wall, Insert a sleeve into the through hole, fill the grout between the sleeve and the through hole, and then insert the water injection pipe into the sleeve so as to reach the through pipe jig, and then seal between the sleeve and the water injection pipe. Then, the through-pipe construction method for the building wall is characterized in that the through-pipe jig is removed.

  The present invention is also a through-pipe jig characterized in that a transparent top plate is provided on the top of a cylinder having a bottom flange.

  Further, the present invention has a main cylinder having a bottom flange, a transparent connecting plate provided on the top, a connecting flange connected to the connecting plate of the main cylinder, and a transparent top plate provided on the top. A through-pipe jig comprising the sub-cylinder provided.

  According to the present invention, by providing a transparent top plate on the cylinder and using a through pipe jig, a through hole is formed while maintaining a pressure difference between the inside and outside of the concrete wall, and a water injection pipe is provided in the through hole. It demonstrates the excellent effect of being able to insert and construct.

It is a perspective view of the penetration piping jig used for construction of the present invention. It is sectional drawing of the through-pipe jig of FIG. It is a figure which shows the procedure of the through-pipe construction method of the building wall of this invention. It is a figure which shows the procedure following FIG. It is a figure which shows the water injection system | strain around the reactor well of a reactor building. It is the schematic of a nuclear reactor building.

  A preferred embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

  First, the through piping jig 30 will be described with reference to FIGS.

  The through piping jig 30 is basically configured by providing a transparent top plate 36 on a cylinder (a main cylinder 32 and a sub cylinder 33).

  More specifically, the through-pipe jig 30 has a bottom flange 31, a main cylinder 32 provided with a transparent connection plate 34 at the top, and a connection flange connected to the connection plate 34 of the main cylinder 32. 35, a transparent top plate 36 is provided at the top, and a sub cylinder 33 smaller than the diameter of the main cylinder 32 is formed. A hole 37 having the same diameter as the inner diameter of the sub cylinder 33 is formed in the connection plate 34, and the connection flange 35 of the sub cylinder 33 is connected to the connection plate 34 by a bolt nut 38.

  The bottom flange 31 is formed with a hole 39 for fixing to the concrete wall with an anchor bolt or the like.

  The main cylinder 32 and the sub cylinder 33 are made of a vinyl chloride resin tube, and the bottom flange 31, the connection plate 34, and the top plate 36 are made of a transparent vinyl chloride resin plate.

  Next, a building wall through pipe construction method using this through pipe jig 30 will be described with reference to FIGS.

  3 (a) to 3 (f) and FIGS. 4 (g) to 4 (j) are procedures of a through pipe construction method for inserting the water injection pipe 20 into the concrete wall 10w of the outer wall or inner wall of the reactor building. 3 and 4, the right side is the high pressure side and the left side is the low pressure side with the concrete wall 10w interposed therebetween, and the water injection pipe 20 is inserted after the through hole 25 is drilled from the low pressure side. I will explain it.

  First, as shown in FIG. 3A, a through-pipe jig 30 is attached at a position where a through-hole 25 for inserting the water injection pipe 20 is formed on the high-pressure side of the outer wall of the reactor building or the concrete wall 10w of the inner wall. .

  The through pipe jig 30 may be fixed to the concrete wall 10w with an anchor bolt or the like. However, when there is an existing pipe support material 26 on the high pressure side, a connection plate between the pipe support material 26 and the through pipe jig 30 The wedge 27 is driven into the gap between the 34 and fixed so that the bottom flange 31 is in close contact with the concrete wall 10w. At this time, a seal packing is interposed between the bottom flange 31 and the concrete wall 10w.

  A machine support plate 28 for supporting a boring machine (not shown) is attached to the low-pressure concrete wall 10w.

  As shown in FIG.3 (b), the concrete wall 10w of the low voltage | pressure side is pierced with a boring machine, and the through-hole 25 is formed. The arrival position of the through hole 25 is detected by a sensor or the like, and since the top plate 36 of the through pipe jig 30 is transparent, it is visually confirmed from the high pressure side after the penetration.

  After this through hole 25 is formed, smoke S for leak test is sprayed around between the bottom flange 31 of the through pipe jig 30 and the concrete wall 10w, and there is no smoke leak visually from the low pressure side through hole 25. Check.

  As shown in FIG. 3C, the sleeve 40 with the collar 41 is inserted into the through hole 25. The outer diameter of the collar 41 is formed to be the same as the inner diameter of the through hole 25, and a grout 42 is filled between the through hole 25 and the sleeve 40 on the low pressure side from the collar 41 as shown in FIG.

  As shown in FIG. 3E, the water injection pipe 20 is inserted into the sleeve 40 so that the tip thereof reaches the sub cylinder 33 of the through pipe jig 30. This insertion state can also be visually observed from the top plate 36 of the sub cylinder 33.

  Thereafter, a lead hair clip 43 is attached between the sleeve 40 and the water injection pipe 20, and the low pressure side end of the water injection pipe 20 is sealed with a closing cap 44.

  As shown in FIG. 3 (f), a boot rubber 45 is attached to the outer periphery of the water injection pipe 20 protruding from the lead hair clip 43.

  Thereafter, as shown in FIG. 4 (g), the auxiliary cylinder 33 (FIG. 3 (f)) of the through pipe jig 30 is removed from the main cylinder 32, and a new water injection pipe is added to the water injection pipe 20 protruding from the main cylinder 32. 20 are connected to each other, and smoke S is blown around the sleeve 40 from the low pressure side to confirm that there is no leak.

  As shown in FIG. 4 (h), on the high-pressure side, the main tube 32 (FIG. 4 (g)) of the through piping jig 30 is removed and an extension sleeve 40a with a smoke injection tube 40s is welded to the sleeve 40. Then, as shown in FIG. 4 (i), the grout 42 is filled from the collar 41 to the through hole 25 and the sleeve 40 on the high pressure side.

  Thereafter, as shown in FIG. 4 (j), after inserting a disc-shaped presser plate 46 into the sleeve 40, lead hairs 47 for radiation shielding are inserted, and between the water injection pipe 20 and the sleeve 40. After filling the gap and attaching the lead hair clip 43 to the extension sleeve 40a, the boot rubber 45 is attached. Thereafter, compressed air (including smoke) S is injected from the smoke injection pipe 40s and a pressure resistance test is performed to confirm that there is no leakage, and the construction is completed.

  As described above, in the present invention, the through hole 25, the sleeve 40 and the water injection pipe 20 can be easily inserted by simply attaching the through pipe jig 30 to the concrete wall 10w. Since it is transparent, it is possible to visually check the work status.

  3 and 4, the construction example in which the through hole 25 is bored from the low pressure side and the water injection pipe 20 is inserted has been described, but conversely, the construction may be performed from the high pressure side.

10w Concrete wall 20 Water injection pipe 25 Through hole 30 Through pipe jig 31 Bottom flange 32 Main cylinder 33 Sub cylinder 34 Connection plate 35 Connection flange 36 Top plate

Claims (3)

  In a through-hole piping construction method for building walls for boring through-holes in concrete walls and inserting water injection pipes into the through-holes, a transparent top plate is provided on the cylinder to form a through-pipe jig, and the through-pipe Fix the jig to one of the concrete walls that form the through-hole, form a through-hole from the other concrete wall to the through-pipe jig fixed to the concrete wall, insert the sleeve into the through-hole, and insert the sleeve After filling the grout between the through hole and inserting the water injection pipe into the sleeve so as to reach the through pipe jig, seal between the sleeve and the water injection pipe, and then remove the through pipe jig. Through-pipe construction method for building walls.   A through piping jig, wherein a transparent top plate is provided at the top of a cylindrical body having a bottom flange.   A main cylinder having a bottom flange and having a transparent connection plate on the top, and a sub cylinder having a connection flange connected to the connection plate of the main cylinder and having a transparent top plate on the top A through-pipe jig characterized by comprising.