JP2018193674A - Method for installing mechano-electric appliance in tunnel - Google Patents

Abstract

To provide a method for installing a mechano-electric appliance in a tunnel, which can achieve shortening of the construction term and simplification of the construction working.SOLUTION: A method for installing a mechano-electric appliance 30 in a tunnel 20, includes the following steps of: installing a mold frame 26 with which a fixing jig 27 is provided in an excavated tunnel 20; placing concrete 25 to the tunnel 20 in which the mold frame 26 is installed; and fixing the mechano-electric appliance 30 connected by connection members 35 to the fixing jig 27 mounted on the mold frame 26. Also the mechano-electric appliance 30 is previously connected at the ground level by the connection member 35.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for installing electrical equipment in a tunnel provided in a power plant such as a nuclear power plant or a thermal power plant.

  2. Description of the Related Art In recent years, power plants such as nuclear power plants and thermal power plants have been required to install special serious accident handling facilities such as emergency power supply facilities and control facilities at positions away from existing buildings. And this special serious accident handling facility and the existing building are connected via mechanical equipments, such as a cable and piping. Mechanical equipment is buried underground to protect against natural disasters such as tornadoes and tsunamis and external factors such as intentional aircraft collisions. In order to embed the mechanical equipment underground, a tunnel consisting of a wall and a tunnel is excavated between the existing building and the emergency equipment, and the electrical equipment is installed in this tunnel.

  Patent Document 1 describes a method of installing piping on a shaft. In Patent Document 1, a liner unit including a cylindrical liner having a predetermined length that is arranged along an inner wall of a vertical shaft and forms a pipe storage space therein, and a work staircase attached to the interior of the liner is provided. Assemble in the work space provided at the top. Thereafter, the liner unit is suspended in the shaft and connected to the lower liner unit, and a plurality of liner units are connected to the top of the shaft. And the several piping unit divided | segmented into predetermined length is suspended in the piping storage space, and is mutually connected.

  In addition, when installing electromechanical equipment in the tunnel used for power generation plants, such as a nuclear power plant and a thermal power plant, it is necessary to cast concrete for reinforcement in the inner wall of a tunnel shaft or a tunnel. Then, after removing the formwork for placing concrete, cables, pipes and the like are individually installed in the tunnel.

JP 11-328319 A

  However, in nuclear power plants, special serious accident handling facilities are located away from existing buildings in order to protect the special serious accident handling facilities from external factors. It was. In the conventional installation method, the cable and piping are individually installed in the tunnel after removing the formwork for placing concrete, so the construction period becomes longer and the construction work becomes complicated. Had.

  In view of the above-described problems, the present object is to provide a method for installing mechanical equipment in a tunnel that can shorten the construction period and simplify the construction work.

In order to solve the above-described problems and achieve the object, the method of installing the electrical equipment in the tunnel includes the following steps (1) to (3).
(1) A step of installing a formwork provided with a fixing jig in an excavated tunnel.
(2) A process of placing concrete in a tunnel in which a formwork is installed.
(3) A step of fixing the electromechanical equipment connected by the connecting member to a fixing jig provided on the mold.
And an electromechanical installation is previously connected by the said connection member on the ground.

  According to the installation method of the electrical equipment in the tunnel having the above configuration, the construction period can be shortened and the construction work can be simplified.

It is a figure which shows schematic structure of the power plant concerning the embodiment, FIG. 1A is a top view, FIG. 1B is sectional drawing which shows the tunnel of a power plant. It is sectional drawing which shows the vertical shaft concerning the example of embodiment. It is a top view which shows the vertical shaft concerning the example of embodiment. It is a flowchart which shows the installation method of the electrical equipment to the tunnel concerning an embodiment. It is sectional drawing which shows the installation method of the electromechanical installation to the tunnel concerning the Example, and shows the state which installed the formwork in the tunnel. It is a top view which shows the installation method of the electromechanical installation to the tunnel concerning an Example, and shows the state which installed the formwork in the tunnel. It is sectional drawing which shows the installation method of the electrical equipment to the tunnel concerning an embodiment, and shows the state which laid concrete. It is a top view which shows the installation method of the electrical equipment to the tunnel concerning an embodiment, and shows the state which laid concrete. It is sectional drawing which shows the installation method of the electrical equipment in the tunnel concerning an embodiment, and shows the state which installed the electrical equipment. It is sectional drawing which shows the installation method of the electromechanical installation to the tunnel concerning an embodiment, and shows the state which installed the following formwork.

  Hereinafter, the installation method of the electrical equipment in the tunnel according to the embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the common member in each figure.

1. Configuration Example of Power Plant First, the configuration of a power plant according to an embodiment (hereinafter referred to as “this example”) will be described with reference to FIG.
1A and 1B are diagrams showing a schematic configuration of a power plant of this example.

  The power plant 100 of this example shown in FIGS. 1A and 1B is, for example, a nuclear power plant or a thermal power plant. The power plant 100 includes an existing building 1, peripheral facilities 2 and 3 disposed around the existing building 1, a special serious accident handling facility (hereinafter referred to as “special facility”) 10 installed on the hill 9, have.

  As the existing building 1 showing the first building, for example, a nuclear power plant includes a reactor building and an existing power supply room, and a thermal power plant includes a cooling tower and a turbine room.

  Examples of the peripheral facilities 2 and 3 include a storage tank for storing cooling water and a power supply room in a nuclear power plant, and a storage tank and a power supply chamber in a thermal power plant. The existing building 1 and the peripheral facilities 2 and 3 constitute an example of the existing facility of this example.

  As the special-weight facility 10 indicating the second building, for example, there are emergency power supply facilities, various other facilities such as a control room and a fuel tank. This special-weight facility 10 is provided at a location away from the existing building 1 in order to protect against natural disasters such as tornadoes and tsunamis and external factors such as intentional aircraft collisions. The special weight facility 10 and the existing building 1 are connected via a tunnel 20 provided in the basement.

  The tunnel 20 includes a first shaft 21 </ b> A formed by excavating the ground from the bottom of the existing building 1, a shaft 21 </ b> B formed by excavating the ground from the bottom of the special weight facility 10, and a tunnel 22. And have. The cave 22 connects the first shaft 21A and the second shaft 21B. In the shafts 21A and 21B and the tunnel 22 of the tunnel 20, mechanical equipment 30 (see FIGS. 2 and 3) such as a cable 31 and a pipe 32 is installed.

  By installing the mechanical and electrical equipment 30 in the vertical shafts 21A and 21B (hereinafter simply referred to as “built-up shaft 21”) and the tunnel 22 of the tunnel 20 provided underground, natural disasters such as tornadoes and tsunamis, and intentional It is possible to protect the electromechanical equipment 30 from external factors such as a serious aircraft collision.

2. Next, a configuration of the mechanical equipment 30 installed in the shaft 21 will be described with reference to FIGS. 2 and 3.
FIG. 2 is a sectional view showing the shaft 21, and FIG. 3 is a plan view showing the shaft 21.

  As shown in FIGS. 2 and 3, reinforcing concrete 25 is placed on the wall surface 21 a of the shaft 21. The concrete 25 is driven into the shaft 21 by a plurality of molds 26 having a predetermined height. As shown in FIG. 2, the plurality of molds 26 are installed along the height direction of the shaft 21. As shown in FIGS. 2 and 3, a fixing jig 27 is provided on the mold 26 used when placing the concrete 25. The fixing jig 27 protrudes from the wall surface of the mold 26. The fixing jig 27 is fixed with a cable 31, a pipe 32, and the like constituting an electromechanical facility 30, which will be described later.

  The formwork 26 is also installed in the shaft 21 after the concrete 25 is cast and the installation of the electromechanical equipment 30 is completed. Accordingly, it is preferable that the mold 26 has high strength and excellent durability. Therefore, examples of the material of the mold 26 include metal, but the material is not limited to metal, and wood may be used.

  Further, as shown in FIG. 3, the shaft 21 is partitioned into a plurality of sections 29 </ b> A, 29 </ b> B, 29 </ b> C, 29 </ b> D, and 29 </ b> E by a concrete 25 and a formwork 26. The plurality of sections 29A, 29B, 29C, 29D, and 29E include, for example, a section 29A in which a normal mechanical device 30 is installed, a section 29B in which an emergency mechanical device 30 is installed, and a dedicated mechanical device that is used for a specific application. It is classified into a section 29C in which the facility 30 is installed, a section 29D in which other electromechanical equipment 30 is installed, a section 29E in which an elevator is installed, and the like.

  As shown in FIGS. 2 and 3, the electrical equipment 30 such as the cable 31, the pipe 32, and the work floor 33 is disposed in the sections 29 </ b> A, 29 </ b> B, 29 </ b> C, and 29 </ b> D, and an elevator is installed in the section 29 </ b> E. And the electrical equipment 30 arrange | positioned in each division 29A, 29B, 29C, 29D is being fixed to the fixing jig 27 provided in the formwork 26. FIG.

  In addition, the structure in the cave 22 is provided with the electromechanical equipment 30 similarly to the shaft 21 shown in FIGS. 2 and 3, and the configuration is the same as that of the shaft 21, and the description thereof is omitted.

3. Next, a method for installing the mechanical equipment 30 in the vertical shaft 21 having the above-described configuration will be described with reference to FIGS. 4 to 10.
FIG. 4 is a flowchart showing a method of installing the mechanical equipment 30. 5-10 is the top view and sectional drawing which show the inside of the shaft 21 in the installation method of the electromechanical installation 30. FIG.

  First, the shaft 21 is excavated (step S11). In addition, you may use the shaft 21 excavated previously. Next, as shown in FIG.5 and FIG.6, the formwork 26 which has predetermined | prescribed height is installed in the shaft 21 (step S12). As shown in FIG. 5, the mold 26 is erected from the bottom surface in the shaft 21. Moreover, as shown in FIG. 6, the formwork 26 is installed so that the inside of the shaft 21 may be divided according to several division 29A, 29B, 29C, 29D, 29E. As described above, the mold 26 is provided with the fixing jig 27 for fixing the electromechanical equipment 30.

  Next, as shown in FIGS. 7 and 8, concrete 25 is placed between the wall surface 21a of the shaft 21 and the mold frame 26, or between the two mold frames 26, 26 (step S13). Thereby, as shown in FIG. 7, the concrete 25 is placed in the shaft 21 to the height of the mold 26. At this time, as shown in FIG. 8, the inside of the shaft 21 is divided into a plurality of sections 29 </ b> A, 29 </ b> B, 29 </ b> C, 29 </ b> D, 29 </ b> E by the formwork 26 and the concrete 25.

  When the placement of the concrete 25 in the step S13 is completed, next, as shown in FIG. 9, the electrical equipment 30 blocked by a predetermined length with the formwork 26 left in the shaft 21 is provided. It installs in the shaft 21 (step S14). Note that the lengths of the cables 31 and the pipes 32 of the mechanical equipment 30 to be blocked are set according to the length (height) of the mold 26 to be fixed.

  Here, the cables 31 and the pipes 32 constituting the electromechanical facility 30 are connected in advance by a connecting member 35 for each of the sections 29A, 29B, 29C, and 29D. Thereby, the electrical equipment 30 is divided into blocks 29A, 29B, 29C, and 29D. The connecting member 35 is removed after fixing the electrical equipment 30 to the fixing jig 27 of the mold 26.

  Moreover, the operation | work which blocks the electrical equipment 30 for every division 29A, 29B, 29C, 29D is performed on the ground previously. Thus, by performing on the ground wider than the inside of the shaft 21, work efficiency can be increased, and the work performed in the shaft 21 can be simplified.

  In addition, by making the machine / electric equipment 30 into blocks 29A, 29B, 29C, 29D, the cables 31 and the pipes 32 constituting the machine / electric equipment 30 can be simultaneously installed in the sections 29A, 29B, 29C, 29D. As a result, it is possible to save the trouble of individually installing the cables 31 and the pipes 32, shortening the construction period and simplifying the construction work.

  Note that the working floor 33 may be used as the connecting member 35 for connecting the electromechanical equipment 30. Thereby, the number of parts can be reduced.

  Moreover, since the electromechanical facility 30 is installed without removing the mold 26, the work of removing the mold 26 can be omitted, and the work process can be simplified and the construction period can be shortened. Furthermore, since the fixing jig 27 for fixing the electromechanical equipment 30 is provided in the mold 26 in advance, the work of installing the fixing jig 27 after placing the concrete 25 can be omitted.

  Next, it is determined whether or not the installation of all the mechanical equipment 30 from the bottom to the top of the shaft 21 has been completed (step S15). When the installation of all the electrical equipment 30 from the bottom to the top of the shaft 21 is not completed (NO determination in step S15), the process returns to step S12.

  That is, as shown in FIG. 10, a new mold 26B is installed on the upper part of the mold 26 to which the mechanical equipment 30 is fixed in the process of step S14. And the process of step S12 to step S14 mentioned above is repeated until all the electromechanical installations 30 are installed from the bottom part of the shaft 21 to the top part. And if installation of all the electromechanical equipment 30 from the bottom part of the shaft 21 to the top part is completed, the installation work of the electromechanical equipment 30 to the shaft 21 will be completed.

  In addition, since the installation operation | work of the electromechanical equipment 30 to the tunnel 22 is the same as that of the electromechanical installation 30 to the shaft 21 mentioned above, the description is abbreviate | omitted.

  In this example, although the example in which the mechanical equipment 30 installed in the shaft 21 is blocked for each of the plurality of sections 29A, 29B, 29C, and 29D has been described, the present invention is not limited to this. For example, when the inside of the shaft 21 is not partitioned into a plurality of sections 29 </ b> A, 29 </ b> B, 29 </ b> C, 29 </ b> D, all the cables 31 and the pipes 32 constituting the electromechanical facility 30 may be connected by the connecting member 35.

  Furthermore, in this example, the example in which the formwork 26 having a predetermined height is installed and the concrete 25 is placed to a predetermined height and then the electromechanical equipment 30 is installed has been described. However, the present invention is not limited to this. . For example, after the concrete 25 is cast from the bottom to the top of the shaft 21, the electromechanical equipment 30 may be installed.

  Moreover, although the example which installs the electrical equipment 30 after installing the formwork 26 and placing concrete 25 was demonstrated in this example, it is not limited to this. For example, the mechanical equipment 30 may be fixed in advance to the fixing jig 27 of the mold 26 on the ground, and the concrete 25 may be placed after the mold 26 with the mechanical equipment 30 fixed is installed in the shaft 21. . Thereby, since the operation | work which fixes the electromechanical equipment 30 and the formwork 26 can be performed on the ground, construction work can be simplified.

  The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention described in the claims.

  DESCRIPTION OF SYMBOLS 1 ... Existing building (1st building), 2, 3 ... Peripheral equipment, 9 ... High ground, 10 ... Special serious accident handling facility (2nd building), 20 ... Tunnel, 21, 21A, 21B ... Vertical shaft, 22 ... Cave 25 ... Concrete, 26, 26B ... Formwork, 27 ... Fixing jig, 29A, 29B, 29C, 29D, 29E ... Section, 30 ... Mechanical equipment, 31 ... Cable, 32 ... Piping, 33 ... Work floor, 35 ... Connecting member, 100 ... power plant

Claims (4)

Installing a formwork provided with a fixing jig in the excavated tunnel;
Placing concrete in the tunnel in which the formwork is installed;
Fixing the electrical equipment connected by the connecting member to the fixing jig provided in the mold,
Including
The mechanical equipment is connected in advance by the connecting member on the ground, and the mechanical equipment is installed in a tunnel. The electrical equipment is
The tunnel is divided into sections,
The method for installing mechanical equipment in a tunnel according to claim 1, wherein the mechanical equipment is connected by the connecting member for each of the sections. The method for installing the electromechanical equipment in the tunnel according to claim 1, wherein the electromechanical equipment is fixed to the fixing jig of the mold in advance on the ground. The tunnel
Connecting the first building and the second building installed at a location away from the first building;
A first shaft formed by excavating underground from the bottom of the first building;
A second shaft formed by excavating the ground from the bottom of the second building;
The installation method of the electromechanical equipment to the tunnel of Claim 1 which has a cave which connected the said 1st shaft and the said 2nd shaft, and was provided in the ground.

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