JP2001131943A - Mounting device of exposed piping and method of erection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the positioning of piping without using any special regulating member or excavating a setting surface and attain the shortening of the term of works and the reduction in the cost of works. SOLUTION: A mounting device 3 for erecting a water conduit pipe 2 within a tunnel 1 for dam intake and discharge facility is formed of a lower frame 4 and an upper frame 5. The lower frame 4 is placed and fixed to the bottom 1a of the tunnel 1, piers 14 and 17 are mutually fitted to connect the upper frame 5 to the lower frame 5 in such a manner as to be capable of rising and falling, and a mount base 6 is temporarily placed on the upper frame 5. Thereafter, the conduit pipe 2 is carried onto the mount base 6, the upper frame 5 is raised and lowered by a jack 23 to vertically position the conduit pipe 2, and the mount base 6 is moved on. the upper frame 5 to horizontal position the conduit pipe 2. The piers 14 and 17 are then mutually welded in the respective positions, and the mount base 6 is welded to the upper frame 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an installation device used for installing piping, particularly an exposed piping, and a method of erection of exposed piping performed by using the installation device.

[0002]

2. Description of the Related Art For example, in a water intake and discharge facility of a dam, a tunnel (civil engineering structure) constructed as a temporary drainage channel is used.
In many cases, a water pipe is disposed inside the water pipe, and water is discharged through the water pipe. In this case, there are two types of installation methods for the water pipes (piping): a buried type that embeds in concrete, and a laid type that is installed in an exposed state using a mounting gantry. Has been adopted.

Conventionally, the mounting base used in this mounting method is generally in the form of a truss or a rigid frame, and when mounting a water pipe as an exposed pipe, the mounting base is fixed to the bottom of the tunnel. After that, while carrying the water pipe on the installation stand and performing its positioning,
The water pipe was fixed to the mounting base by an appropriate method such as welding or bolting. By the way, the water pipe is constructed by successively adding pipes of a certain length and extending the length of the pipe. (Concentric).

[0004]

However, according to the erection method using the above-mentioned mounting frame, since the mounting frame has a fixed size, the height of the upper surface changes due to unevenness at the bottom of the tunnel. A gap may be formed between the water pipe and the water pipe, or the water pipe may be unnecessarily lifted. Therefore, conventionally, adjusting members such as a spacer and a liner are prepared, and these are interposed between the installation stand and the water pipe, or the installation surface of the installation stand is excavated, and the height of the installation stand is increased. However, the degree of the adjustment differs depending on the installation location, and it is necessary to perform adjustment member processing, excavation, etc. while adjusting at the site, and it is unavoidable that the construction period is extended and the construction cost is increased. There was a problem. In addition, since the tunnel is usually constructed in a winding manner, the water pipe must be bent in accordance with the shape of the tunnel, and the air space in the tunnel is narrow. Construction work is
It was even more difficult.

The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to easily position a pipe without using a special adjustment member or excavating an installation surface. It is an object of the present invention to provide an exposed pipe installation apparatus that greatly contributes to shortening the construction period and reducing the construction cost, and to provide a construction method using the installation apparatus.

[0006]

In order to achieve the above object, an apparatus for installing an exposed pipe according to the present invention comprises a lower frame mounted and fixed on a civil engineering structure and an upper frame supporting a pipe. The upper mount is configured to be coupled to the lower mount so as to be able to move up and down. In the installation apparatus of the exposed piping configured as described above, the installation base is divided into upper and lower parts, and the upper base is connected to the lower base so as to be able to move up and down, so that the lower base is placed and fixed on the civil engineering structure. Thereafter, by moving the upper pedestal up and down, positioning of the exposed pipe in the height direction can be easily performed.

[0007] In the apparatus of the present invention, a pedestal having a curved receiving surface aligned with the outer peripheral surface of the exposed pipe is placed on the upper pedestal,
The exposed pipe may be supported on the curved receiving surface of the pedestal. In this case, the horizontal position of the exposed pipe can be easily determined by adjusting the position of the pedestal with respect to the upper gantry.

In the method of erection of an exposed pipe according to the present invention, the lower gantry is placed and fixed on a civil engineering structure, and then the upper gantry is connected to the lower gantry so as to be able to move up and down. It is characterized in that it is carried in and fixed to the lower gantry while raising and lowering the upper gantry. In addition, when the upper pedestal is to support the piping via the pedestal, after the upper pedestal is connected to the lower pedestal so as to be able to move up and down as described above, the pedestal is temporarily placed on the upper pedestal, and then Then, the pipe is carried onto the receiving stand, and is fixed to the lower stand while elevating and lowering the upper stand, and is fixed to the upper stand while moving the receiving stand in the horizontal direction. In this erection method, a jack may be used when raising and lowering the upper pedestal.
The lifting and lowering can be performed more easily.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 to 3 show an exposure pipe installation apparatus according to an embodiment of the present invention. In these figures, reference numeral 1 denotes a tunnel (civil engineering structure) constructed in a water intake and discharge facility of a dam, 2 denotes a water pipe installed in the tunnel 1, and 3 denotes an installation device according to the present invention. Reference numeral 3 denotes a lower gantry 4 mounted and fixed on the bottom 1a of the tunnel 1, an upper gantry 5 coupled to the lower gantry 4 so as to be able to move up and down, and a fixed and mounted pedestal on the upper gantry 5. And a cradle 6 for supporting the same.

As shown in FIG. 3, the lower frame 4 includes a base 13 formed by bridging a connecting member 12 between a pair of left and right tread plates 11, 11, and a connecting member 12 of the base 13.
It comprises a pair of cylindrical pillars 14 protruding from both upper ends. In the present embodiment, the connecting member 12 is formed from a grooved steel, and the pillar 14 is formed from a steel pipe.
The connecting member 12 is fixed to the tread plate 11 and the pillar 14 is fixed to the connecting member 12 by welding. Each tread 11
Are formed at both ends thereof with through holes 15 through which anchors (not shown) extending from a concrete pedestal 8 (FIG. 1) cast into the bottom 1a of the tunnel 1 are inserted.
Is fixed horizontally to the bottom 1a of the tunnel 1 using an anchor passed through the through hole 15 with the tread plate 11 placed on the concrete pedestal 8.

On the other hand, the upper pedestal 5 has a base 16 having substantially the same shape as the connecting member 12 of the lower pedestal 4, and protrudes from both ends of the base 16 at the same intervals as the pillars 14 of the lower pedestal 4. And a pair of cylindrical pillars 17. The pedestal 17 of the upper pedestal 5 has an outer diameter slightly smaller than the inner diameter of the pedestal 14 of the lower pedestal 4,
The two legs 14 and 17 can be slidably fitted. In addition, each of the base 16 and the pillar 17 of the upper frame 5 is connected to the connecting member 1 of the lower frame 4.
2. Like the pillar 14, it is formed from a grooved steel or a steel pipe.

The receiving table 6 has a box shape, and has a curved receiving surface 18 on the upper surface thereof, which is aligned with the outer peripheral surface of the water pipe 2. The face plate 19 that defines the upper surface of the pedestal 6 has a peripheral portion protruding from the side surface of the pedestal 6, and a bolt insertion hole 20 is provided in the protruding portion. Bolt insertion hole 2
Numeral 0 is for inserting a bolt (not shown) for locking both ends of a tightening band 21 for fixing the water guide pipe 2 on the receiving stand 6. A mounting bracket 22 having a through hole matching the hole 20 is provided (FIG. 1).

Hereinafter, a method of erection of the water pipe (exposed pipe) 2 using the above-described installation device 3 will be described. Water pipe 2
When erection is performed, a concrete pedestal 8 is previously placed at the installation location of the installation device 3 on the bottom 1a in the tunnel 1, and an anchor (not shown) is extended upward from the concrete pedestal 8. First, the tread 11 constituting the base 13 of the lower gantry 4 is placed on the concrete pedestal 8 while passing the anchor through the through hole 15, and a nut (not shown) is screwed to the anchor in this state. Tread 11
To the concrete pedestal 8. Next, the upper pedestal 5 is coupled to the lower gantry 4 so as to be able to move up and down while the pedestal 17 of the upper gantry 5 is fitted into the pedestal 14 of the lower gantry 4.
Next, the upper gantry 5 is lifted to an appropriate height by a plurality of (two in this case) jacks 23 (FIG. 1) placed on the base 13 of the lower gantry 4. Thereafter, the pedestal 6 is temporarily placed on the upper pedestal 5, and the water pipe 2 is carried into the curved receiving surface 18 of the pedestal 6. It is positioned with respect to the installed conduit.

When positioning the water conduit 2, first, the upper pedestal 5 is moved up and down by operating the jack 23 to perform positioning in the height direction.
Move it up to perform horizontal positioning. After the positioning of the water pipe 2 is completed, the joint between the pillar 14 of the lower gantry 4 and the pillar 17 of the upper gantry 5 is welded and fixed, and the cradle 6 is welded and fixed to the upper gantry 5. Thus, since all of these weldings can be performed in a downward position from above, welding workability is improved. Then cradle 6
One end of the upper water pipe 2 is joined to the water pipe previously erected, and a fastening band 21 is wrapped around the water pipe 2 on the receiving stand 6, and the mounting brackets 22 at both ends thereof are attached to the receiving stand 6. The bolts and nuts (not shown) passed through the bolt insertion holes 20 are fixed to the pedestal 6, thereby completing the installation of the water pipe 2. After the installation, loosen the jack 23,
It is removed from the installation device 3 and carried out to the next installation location.

In the above embodiment, welding is used for fixing the lower gantry 4 to the upper gantry 5 and for fixing the upper gantry 5 to the receiving pedestal 6. The fixing method is arbitrary.
For example, fixing by bolts and nuts, fixing by a clamp method, and the like can be adopted. Further, the structure in which the upper pedestal 5 is coupled to the lower pedestal 4 so as to be able to move up and down is also arbitrary. For example, instead of fitting the pillars 14 and 17 in the above embodiment, a guide bar extending from one side of the pedestal may be used. It is possible to adopt a structure in which it is inserted through a guide hole provided in the other stand. Further, in the above embodiment, the case where the water pipe 2 is erected in the tunnel 1 constructed in the intake and discharge facility of the dam is exemplified, but the application of the installation device and the erection method of the present invention are not limited thereto. Needless to say, the present invention can be applied to the construction of exposed piping used for various purposes.

[0017]

As described above, according to the exposed pipe installation apparatus and the erection method according to the present invention, the pipe can be easily positioned without using a special adjusting member or excavating the installation surface. This has the effect of greatly contributing to shortening the construction period and reducing construction costs.

[Brief description of the drawings]

FIG. 1 is a front view showing a final configuration of an installation apparatus for an exposed pipe according to the present invention.

FIG. 2 is a side view showing a final form of the installation device.

FIG. 3 is an exploded perspective view of the installation device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tunnel (civil structure) 2 Water pipe (exposure piping) 3 Installation device 4 Lower pedestal 5 Upper pedestal 6 Cradle 14,17 Pedestal 18 Curved receiving surface of cradle 21 Fastening band

Claims (5)

[Claims] 1. A lower gantry mounted and fixed on a civil engineering structure, and an upper gantry for supporting piping, wherein the upper gantry comprises:
An installation apparatus for an exposed pipe, which is coupled to the lower base so as to be able to move up and down. 2. A pedestal having a curved receiving surface aligned with the outer peripheral surface of the exposed pipe on the upper pedestal, and the exposed pipe is supported on the curved receiving surface of the pedestal. 1
An installation device for an exposed pipe according to the above. 3. After mounting and fixing the lower gantry to the civil engineering structure, the upper gantry is coupled to the lower gantry so as to be able to move up and down, and then the pipe is carried into the upper gantry and the upper gantry is moved up and down. A method of erection of exposed piping, characterized in that it is fixed to the lower cradle while being mounted. 4. After mounting and fixing the lower gantry to the civil engineering structure, the upper gantry is coupled to the lower gantry so as to be able to move up and down, and then the cradle is temporarily placed on the upper gantry. A method of laying exposed pipes, wherein a pipe is carried onto a receiving stand, and the upper mounting is moved up and down to be fixed to the lower mounting, and the receiving base is fixed to the upper mounting while moving horizontally. 5. The method according to claim 3, wherein a jack is used to raise and lower the upper gantry.