JP2017179703A - Installation method of precast box culvert - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an installation method of a precast box culvert that enables a precast box culvert to be installed in a same direction as a transport direction.SOLUTION: An installation method of a precast box culvert includes: a transport step in which a lower box 1a and an upper box 1b that have been rotated in a horizontal direction are respectively mounted on a carrier 2 for the lower box and a carrier 3 for the upper box, and transported inside a precast box culvert 1 already installed toward an installation location; a lower box rotation step in which the lower box 1a is rotated in the horizontal direction on a pit face side of the lower box 1a already installed; a lower box lifting step in which the lower box 1a is lifted; a lower box installation step in which the lower box 1a is installed at the installation location; an upper box rotation step in which the upper box 1b is rotated in the horizontal direction on a pit face side of the upper box 1b already installed; an upper box transfer step in which the upper box 1b is transferred above an installation location; and an upper box installation step in which the upper box 1b is installed at the installation location.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a PC box culvert installation method for installing a precast box culvert (hereinafter referred to as a PC box culvert) in a narrow place such as a tunnel mine.

  In installing the PC box culvert, a construction method has been proposed in which a traveling carriage or the like is used to convey the inside of the excavation space to the installation location (see, for example, Patent Document 1). According to Patent Document 1, it is not necessary to suspend the PC box culvert from above using a crane or the like, and the PC box culvert can be installed within a narrow excavation section.

Japanese Patent Laid-Open No. 06-240733

  However, in the prior art, since the PC box culvert is transported in the direction opposite to the direction in which the PC box culvert is extended by installation, the PC box culvert is installed after completion of excavation. That is, in the prior art, the PC box culvert is transported from the tunnel head side to the face side and installed from the tunnel face side to the head side, so the PC box culvert is installed in parallel with other work such as excavation. There was a problem that it was not possible.

  This invention is made | formed in view of such a condition, provides the installation method of PC box culvert which can eliminate the above-mentioned subject and can install PC box culvert in the same direction as a conveyance direction. There is.

In the precast box culvert installation method of the present invention, the precast box culvert is composed of a lower box and an upper box which are divided into upper and lower parts, and the lower box and the upper box in a state of being rotated in the horizontal direction are respectively lowered. Loading on the cart for the upper box and the cart for the upper box, and transporting the installed lower box and the existing upper box toward the installation location; and the path of the lower box cart for the existing lower box A travel path extending step extending further downstream in the transport direction, a lower box moving step of moving the lower box carriage on the travel path extended by the travel path extending step, and a transport direction downstream side of the existing lower box The lower box rotating step for rotating the lower box in the horizontal direction to return to the installation direction, and the lower box in front Lowering the lower box by lowering the lower box lifting process, which is lifted from the lower box carriage and positioned above the installation position, and the lower box carriage and the travel path extended by the travel path extension process from the installation position. A lower box installation step to be installed at the installation location, and the upper box carriage is moved to the downstream side in the transport direction from the existing upper box, and the upper box is moved in the horizontal direction downstream from the existing upper box in the transport direction. An upper box rotating step for returning to the installation direction by rotating the upper box, and an upper box installation step for positioning the upper box above the installation location and lowering the upper box to install at the installation location. To do.
Furthermore, in the installation method of the precast box culvert of the present invention, in the travel path extending step, a travel path extension carriage that includes a travel path to be extended and can travel on the installation surface of the lower box is transported more than the existing lower box. It may be prepared on the downstream side, and the travel path of the lower box carriage may be extended to the downstream side in the transport direction from the existing lower box by the travel path extension carriage.
Furthermore, in the precast box culvert installation method of the present invention, the lower box carriage may be provided with a lower box turntable for rotating the loaded lower box in the horizontal direction.
Further, in the precast box culvert installation method of the present invention, a lower box preceding installation section in which the lower box is installed in advance of the upper box is provided, and in the upper box rotating step, the upper box carriage is moved to the lower box. After moving to the box preceding installation section and lifting the upper box above the existing lower box, the upper box may be rotated in the horizontal direction to return to the installation direction.
Further, in the precast box culvert installation method of the present invention, the upper box carriage includes an in-vehicle lifter that lifts the loaded upper box in a vertical direction, and the upper box that is lifted by the in-vehicle lifter. There may be provided an upper box turntable for rotating the frame horizontally.

  According to the present invention, since the installation route of the PC box culvert itself is secured as an independent conveyance path for the PC box culvert, the conveyance direction and the conveyance direction of the PC box culvert can be determined without providing the conveyance path for the PC box culvert. There is an effect that the PC box culvert can be installed in the same direction.

It is a figure which shows the structure of PC box culvert installed with the installation method of PC box culvert concerning this invention. It is explanatory drawing explaining the conveyance process of PC box culvert by the installation method of PC box culvert which concerns on this invention. It is a figure which shows the structure of the trolley | bogie used for the installation method of PC box culvert concerning this invention. It is explanatory drawing explaining the traveling path extension process by the installation method of PC box culvert concerning the present invention. It is explanatory drawing explaining the lower box moving process by the installation method of PC box culvert concerning the present invention. It is explanatory drawing explaining the lower box rotation process by the installation method of PC box culvert which concerns on this invention. It is explanatory drawing explaining the lower box lifting process by the installation method of PC box culvert which concerns on this invention. It is explanatory drawing explaining the lower box installation process by the installation method of PC box culvert which concerns on this invention. It is explanatory drawing explaining the upper box lifting process by the installation method of PC box culvert which concerns on this invention. It is explanatory drawing explaining the upper box rotation process by the installation method of PC box culvert which concerns on this invention. It is explanatory drawing explaining the upper box installation process by the installation method of the PC box culvert concerning this invention.

  Next, modes for carrying out the present invention (hereinafter, simply referred to as “embodiments”) will be specifically described with reference to the drawings.

  A PC box culvert 1 installed in the present embodiment is composed of a lower box 1a and an upper box 1b which are divided into upper and lower parts, as shown in FIG. In FIG. 1, (a) is a front view and (b) is a side view. Further, when the length of the PC box culvert 1 (the length including the slot when the slot is formed) is L, the length L is configured to be shorter than the inner width Wi. In the present embodiment, the PC box culvert 1 is vertically divided into ½, and the outer height Hdo of the lower box 1 a and the outer height Huo of the upper box 1 b are both 1 of the outer height Ho of the PC box culvert 1. / 2, which is shorter than the inner height Hi of the PC box culvert 1.

(Conveying process)
In the installation method of the PC box culvert 1 according to the present embodiment, as shown in FIG. 2, the lower box 1a and the upper box 1b are placed from the wellhead side to the face side with the installed PC box culvert 1 facing the installation location. The PC box culvert 1 is installed from the wellhead side which is the upstream side in the transport direction of the lower box 1a and the upper box 1b toward the face side which is the downstream side in the transport direction of the lower box 1a and the upper box 1b. In FIG. 1, (a) is a side sectional view, and (b) is a side view as seen from the wellhead side. The cross section of the installed PC box culvert 1 has an inner width Wi × inner height Hi. Therefore, the lower box 1a and the upper box 1b are transported in a state where they are rotated by 90 degrees in the horizontal direction with respect to the installed PC box culvert 1, respectively. As described above, the length L of the lower box 1a and the upper box 1b (PC box culvert 1) is configured to be shorter than the inner width Wi of the PC box culvert 1. Thereby, the lower box 1a and the upper box 1b can be transported without contacting the side wall 11 of the installed PC box culvert 1. If there is a margin between the lower box 1a and the upper box 1b to be transported and the side wall 11 of the installed PC box culvert 1, the horizontal rotation angle of the lower box 1a and the upper box 1b is not necessarily 90 degrees. Need not be. However, in view of the weight balance at the time of transport, it is preferable to transport the lower box 1a and the upper box 1b while being rotated 90 degrees in the horizontal direction.

  The lower box 1a is loaded on the lower box carriage 2 and the upper box 1b is loaded on the upper box carriage 3 for conveyance. The lower box carriage 2 and the upper box carriage 3 are connected to a drive carriage 4 such as a battery locomotive in order of the lower box carriage 2, the upper box carriage 3, and the drive carriage 4 from the face side. In the present embodiment, the lower box carriage 2, the upper box carriage 3, and the drive carriage 4 are configured to run on the rails 5 laid on the floor surface 12 of the installed PC box culvert 1. The wheels of the lower box carriage 2, the upper box carriage 3, and the driving carriage 4 may be configured to run on the floor surface 12 of the installed PC box culvert 1 using tires. The lower box carriage 2 and the upper box carriage 3 are driven manually, or the lower box carriage 2 and the upper box carriage 3 are each provided with a drive unit such as a motor so that they can run independently. In this case, the lower box carriage 2 and the upper box carriage 3 may be caused to travel independently.

  As shown in FIG. 3A, the lower box carriage 2 includes a lower box turntable 21 that rotates the loaded lower box 1a in the horizontal direction. Further, in the lower box carriage 2, the height Ha from the floor surface 12 of the PC box culvert 1 to the loading surface of the lower box 1a is greater than (the inner height Hi of the PC box culvert 1−the outer height Hdo of the lower box 1a). It is also configured low. Thereby, the loaded lower box 1a can be transported without contacting the ceiling surface 13 of the installed PC box culvert 1.

  As shown in FIG. 3 (b), the upper box carriage 3 includes a jack 31 that lifts the stacked upper box 1 b in the vertical direction, and an upper box 1 b that is lifted by the jack 31 that rotates in the horizontal direction. A box turntable 32 and a weight 33 for taking a reaction force when the upper box 1b is lifted are provided. Further, in the upper box carriage 3, the height Hb from the floor surface 12 of the PC box culvert 1 to the loading surface of the upper box 1b is (the inner height Hi of the PC box culvert 1−the outer height Huo of the upper box 1b). It is also configured low. Thus, the loaded upper box 1b can be transported without contacting the ceiling surface 13 of the installed PC box culvert 1.

  Next, the process of installing the lower box 1a and the upper box 1b at the installation location will be described in detail with reference to FIGS. 4 to 11, (a) is a side view, and (b) is a view of the installation location from the face side. Also, in FIG. 4 to FIG. 11B, the installed PC box culvert 1 is omitted.

  In the installation method of the PC box culvert 1 of the present embodiment, as shown in FIG. 4, a lower box preceding installation section in which the lower box 1a is installed before the upper box 1b is provided. The lower box preceding installation section is provided so that the upper box 1b loaded on the upper box carriage 3 can move into the lower box preceding installation section. That is, when the lower box carriage 2 and the upper box carriage 3 are connected as in the present embodiment, the lower box carriage 2 and the upper box carriage 3 are both within the section. Set to a length that can be located.

(Runway extension process)
Referring to FIG. 4, a rail carriage 7 that functions as a traveling path extension carriage that extends the traveling path of the lower box carriage 2 is prepared on the face side of the lower box preceding installation section. The rail carriage 7 is configured to be able to travel on the installation surface 6 on which the PC box culvert 1 (lower box 1a) is installed. The installation surface 6 is formed by placing invert concrete, for example. The rail carriage 7 is provided with a connecting rail 5a connected to the rail 5 laid on the floor surface 12 of the installed PC box culvert 1 as an extended traveling path. The rail surface of the connecting rail 5a laid on the rail carriage 7 is at the same height as the rail surface of the rail 5 laid on the floor surface 12 of the installed PC box culvert 1, as shown in FIG. 3 (c). Is set. When the lower box cart 2 travels on the floor surface 12 of the PC box culvert 1 in which the lower box cart 2 is installed, a travel path extension cart in which a connection floor surface having the same height as the floor surface 12 is formed is used.

  As shown by the arrows in FIG. 4, the rail carriage 7 is moved to the wellhead side, the connection rail 5 a laid on the rail carriage 7, and the rail 5 laid on the floor surface 12 of the installed PC box culvert 1. Connecting. The rail 5 laid on the floor 12 of the installed PC box culvert 1 cannot be projected from the lower box preceding installation section to the face side because a new lower box 1a is installed. Therefore, it is good to comprise so that the rail 5 laid in the rail carriage 7 may protrude to the wellhead side. Further, when a gap is generated between the connecting rail 5a and the rail 5 due to the length of the rail 5 to be laid on the floor surface 12 when the connecting rail 5a and the rail 5 are connected, a supplement for complementing the gap is provided. It is good to prepare a rail.

(Lower box moving process)
Next, the lower box carriage 2 is moved to the face side so as to be positioned on the rail carriage 7, and as shown in FIG. 5, the lower box 1a loaded on the lower box carriage 2 is set to be lower than the lower box preceding installation section. Position it on the face side. Note that the length of the connecting rail 5a laid on the rail carriage 7 is set to be equal to or greater than the outer width Wo of the lower box 1a (PC box culvert 1).

(Lower box rotation process)
Next, the lower box turntable 21 of the lower box carriage 2 is rotated by 90 degrees and returned to the direction in which the lower box 1a is installed (the same direction as the installed lower box 1a) as shown in FIG. The rotation of the lower box turntable 21 may be performed using power such as a motor, or may be performed manually.

(Lower box lifting process)
If FIG. 7 is referred, the underground crane 8 which functions as a lifting machine which lifts the lower box 1a will be prepared on the face side of the lower box preceding installation section. Next, the lower box carriage 2 is moved to the wellhead side, and the lower box 1a is positioned above the installation location. Next, the lower box 1 a is lifted from the lower box carriage 2 by the underground crane 8. In addition, when the underground crane 8 has a function of traveling on the installation surface 6, after the lower box 1a is lifted from the lower box carriage 2, the lifted lower box 1a is moved on the underground crane 8 and installed. You may make it position above. Moreover, as shown in FIG.7 (c), you may make it use the jack 9 as a lifting machine which lifts the lower box 1a.

(Lower box installation process)
Next, as shown in FIG. 8, the lower box carriage 2 is moved to the wellhead side, the rail carriage 7 is moved to the face side, and the lower box carriage is moved from below the lower box 1 a lifted by the underground crane 8. 2 and the rail carriage 7 are retracted. And the lower box 1a is lowered | hung with the underground crane 8, and the lower box 1a is installed in an installation location.

(Upper box lifting process)
Next, the upper box carriage 3 is moved to the face side, and the upper box 1b loaded on the upper box carriage 3 is positioned in the lower box preceding installation section as shown in FIG. The upper box 1b is lifted in the vertical direction. The jack 31 functions as an in-vehicle lifting machine that lifts the upper box 1b, and lifts the upper box 1b to a position where the lower end of the upper box 1b exceeds the upper end of the installed lower box 1a.

(Upper box rotation process)
Next, the upper box turntable 32 of the upper box carriage 3 is rotated by 90 degrees to return to the direction in which the upper box 1b is installed (the same direction as the installed upper box 1b) as shown in FIG. The rotation of the upper box turntable 32 may be performed using the power of a motor or the like, or may be performed manually.

(Upper box installation process)
Next, as shown in FIG. 11, the upper box carriage 3 is moved to the wellhead side, and the upper box 1 b lifted by the jack 31 is positioned above the installation location. Next, the upper box 1b is lowered by the jack 31, and the upper box 1b is installed at the installation location.

  Hereinafter, the steps of (conveying step) to (upper box installing step) are repeated to install the PC box culvert 1 from the wellhead side toward the face side. When the installation of the PC box culvert 1 is started, the lower box preceding installation section is formed by the processes of (travel path extension process) to (lower box installation process). Then, at the end of the installation of the PC box culvert 1, the upper box 1b is installed on the lower box preceding installation section by the configuration of (upper box lifting process) to (upper box installation process).

  In the present embodiment, the upper box 1b positioned in the lower box preceding installation section is lifted and rotated. However, by connecting the rail carriage 7, the travel path of the upper box carriage 3 is extended. The upper box 1b may be rotated on the rail carriage 7. In this case, the travel path extending process for the upper box bogie 3 for connecting the rail bogie 7 is increased, but it is not necessary to form the lower box preceding installation section. Further, the upper box 1b is lifted by the underground crane 8 without using the jack 31 of the upper box carriage 3, and the lifted upper box 1b is moved on the underground crane 8 so as to be positioned above the installation location. Also good.

As described above, in the present embodiment, the PC box culvert 1 is composed of the lower box 1a and the upper box 1b that are divided vertically, and the lower box 1a and the upper box 1b that are rotated in the horizontal direction. Are loaded on the lower box carriage 2 and the upper box carriage 3 respectively, and the inside of the installed PC box culvert 1 (the lower box 1a and the upper box 1b) is conveyed toward the installation location, and the lower box A travel path extending process for extending the travel path of the carriage 2 to the downstream side (face side) in the transport direction from the installed lower box 1a; and the lower box carriage 2 is moved onto the travel path extended by the travel path extending process. The lower box moving step and the lower box 1a in the transport direction downstream side (face side) with respect to the installed lower box 1a, the lower box 1a is rotated horizontally to return to the installation direction. The installation location includes a box rotation process, a lower box lifting process in which the lower box 1a is lifted from the lower box carriage 2 and positioned above the installation location, and a travel path extended by the lower box carriage 2 and the travel path extension process. The lower box 1a is lowered and installed at the installation location, and the upper box carriage 3 is moved to the downstream side (face side) in the transport direction from the installed upper box 1b. An upper box rotating step for returning the upper box 1b to the installation direction by rotating the upper box 1b in the horizontal direction on the downstream side (face side) of the upper box 1b with respect to the conveying direction, and positioning the upper box 1b above the installation location. And an upper box installation step in which 1b is lowered and installed at the installation location.
With this configuration, the installation route itself of the PC box culvert 1 is secured as an independent conveyance path of the PC box culvert 1, so that the conveyance can be performed without providing the conveyance path of the PC box culvert 1 in addition to the installation route of the PC box culvert 1. The PC box culvert 1 can be installed in the same direction as the direction. Therefore, the installation of the PC box culvert 1 can be performed simultaneously with other work such as excavation. For example, since the installation work of the PC box culvert 1 can be performed separately from the shield excavation work, the influence of the progress of the work is eliminated. In addition, safety can be ensured by reducing the congestion work.

Further, in the present embodiment, in the travel path extending step, the rail carriage 7 that functions as a travel path extension carriage that has an extended travel path and that can travel on the installation surface of the lower box 1a is conveyed more than the installed lower box 1a. Prepared on the downstream side in the direction (face side), the rail carriage 7 extends the travel path of the lower box carriage 2 to the downstream side (face side) in the transport direction from the lower box 1a that has been installed.
With this configuration, it is possible to easily extend the travel path in the travel path extension process and retreat the extended travel path in the lower box installation process.

Furthermore, in this embodiment, the lower box carriage 2 is provided with a lower box turntable 21 that rotates the loaded lower box 1a in the horizontal direction.
With this configuration, it is not necessary to prepare equipment for rotating the lower box 1a on the downstream side (face side) in the transport direction with respect to the installed lower box 1a. Can be rotated.

Further, in the present embodiment, a lower box preceding installation section in which the lower box 1a is installed ahead of the upper box 1b is provided, and in the upper box rotating process, the upper box carriage 3 is moved to the lower box preceding installation section. After the upper box 1b is lifted above the installed lower box 1a, the upper box 1b is rotated in the horizontal direction to return to the installation direction.
With this configuration, the upper box 1b can be rotated in the horizontal direction and returned to the installation direction without extending the travel path for the upper box carriage 3.

Further, in the present embodiment, the upper box carriage 3 has a jack 31 functioning as an in-vehicle lifting machine that lifts the loaded upper box 1b in the vertical direction, and the upper box 1b lifted by the jack 31 in the horizontal direction. An upper box turntable 32 is provided for rotation.
With this configuration, it is not necessary to prepare equipment for lifting and rotating the upper box 1b on the downstream side (face side) in the transport direction from the installed upper box 1b, and the upper box 1b can be easily installed in the upper box rotating process. Can be lifted and rotated horizontally.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to combinations of these components, and that such modifications are within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Precast (PC) box culvert 1a Lower box 1b Upper box 2 Lower box cart 3 Upper box cart 4 Drive cart 5 Rail 5a Connection rail 6 Installation surface 7 Rail cart 8 Underground crane 9 Jack 11 Side wall 12 Floor surface 13 Ceiling surface 21 Turntable for lower box 31 Jack 32 Turntable for upper box 33 Weight

Claims (5)

The precast box culvert is composed of a lower box and an upper box that are divided vertically.
The lower box and the upper box that are rotated in the horizontal direction are loaded on the lower box carriage and the upper box carriage, respectively, and the inside of the existing lower box and the existing upper box are directed toward the installation location. A transport process to transport;
A travel path extending step of extending the travel path of the lower box carriage to the downstream side in the transport direction from the existing lower box;
A lower box moving step of moving the lower box carriage on the traveling road extended by the traveling road extending step;
A lower box rotating step for returning to the direction in which the lower box is rotated in the horizontal direction and installed on the downstream side in the transport direction from the existing lower box,
A lower box lifting step in which the lower box is lifted from the lower box carriage and positioned above the installation location;
A lower box installation step of retracting the lower box carriage and the travel path extended by the travel path extension process from the installation location, and lowering the lower box and installing the installation location;
Rotating the upper box carriage to the downstream side in the transport direction from the existing upper box, and rotating the upper box in the horizontal direction to return to the installation direction downstream from the existing upper box in the transport direction Process,
A method for installing a precast box culvert, comprising: an upper box installation step in which the upper box is positioned above the installation location, and the upper box is lowered and installed at the installation location.   In the travel path extending step, a travel path extension carriage that includes an extended travel path and that can travel on the installation surface of the lower box is prepared on the downstream side in the transport direction from the existing lower box, and the travel path extension carriage The precast box culvert installation method according to claim 1, wherein a travel path of the lower box carriage is extended downstream in the transport direction from the existing lower box.   The method for installing a precast box culvert according to claim 1 or 2, wherein the lower box carriage is provided with a lower box turntable for horizontally rotating the loaded lower box. A lower box preceding installation section in which the lower box is installed in advance of the upper box;
In the upper box rotating step, the upper box carriage is moved to the lower box preceding installation section, the upper box is lifted above the existing lower box, and then the upper box is rotated in the horizontal direction. 4. The precast box culvert installation method according to claim 1, wherein the installation direction is returned to the installation direction.   The upper box carriage includes an in-vehicle lifter that lifts the loaded upper box in a vertical direction, and an upper box turntable that rotates the upper box that is lifted by the in-vehicle lifter in a horizontal direction. The precast box culvert installation method according to claim 4, wherein the precast box culvert is provided.

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