JPH09317940A - Steel pipe transferring and laying method and steel pipe transferring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable smooth transferring and laying of a steel pipe by transferring the steel pipewith a steel pipe transverse transferring device on an upper feeding surface of a bridge member, transferring the pipe to a position immediately above the embedding portion, removing the bridge member, hanging the steel pipe down, and connecting it to the end of the embedded steel pipe. SOLUTION: A steel pipe receiving base 16a mounting a steel pipe P is moved along an upper feeding surface of a bridge member 31. The steel pipe P is transferred to a position immediately above the steel pipe embedding position of a cut groove 1. A hanging jig 52 is operated in such a state, and the long steel pipe P mounted on the base 16a is hung up once. The steel pipe base 16a alone is transferred along the upper feeding surface of the bridge member 31. After resetting, the bridge member 31 is removed from the cut groove 1. An upper cut beam 5a in the groove is removed, and the steel pipe P is lowered to a specified position. The cut beam 5a is arranged again, and removed. The steel pipe P is lowered to a bottom of the groove 1, followed by welding.

Description

Detailed Description of the Invention

[0001]

[0001] The present invention relates to a gas pipe,
The present invention relates to a method of laying a steel pipe at a work site and a steel pipe transporting device, which are suitable for laying a water pipe or a protective pipe such as a cable in the ground, particularly suitable for carrying out in a narrow place such as a road where traffic is restricted.

[0002]

2. Description of the Related Art Pipes such as gas pipes, water pipes, protection pipes for cables, etc. are newly installed in the ground, or trenches are excavated for repairing existing pipes, and steel pipes are welded in the excavation trenches. It has been implemented to extend it. In this steel pipe laying work, steel pipes manufactured in a pipe manufacturing factory are transported to the laying site by a truck or the like, or at the laying site, a crane or the like is used to hang it down from the truck, and at the site where the excavation trench is laid, earth retaining means is used. The operation of lowering a steel pipe into an excavation groove while operating is known, for example, from Japanese Patent Publication No. 55-31855.

In order to smoothly carry out the laying work of the steel pipe, a steel pipe having a length of 4 to 12 m is usually used.
Further, those steel pipes are heavy items weighing several tons. When the site of pipe laying work for gas, water, etc. is wide, the transport or laying work of steel pipes by truck or crane can be carried out relatively smoothly, but due to the characteristics of pipelines for gas, water, etc. A part of the road is often used as a work area for transporting and laying steel pipes.

[0004]

However, the transportation of steel pipes,
If the width of the laying work area is within half of the road such as a roadway,
You can carry out the work only with traffic regulation on one side,
Normally, there are few places with wide roads like this, so we have no choice but to work at night when traffic is unavoidable, or to rely on human power without using heavy machinery. However, there were many problems in the work environment and the construction cost was high.

Further, in order to carry a steel pipe cut into a predetermined length into the excavation groove, align it with the end portion of the already laid steel pipe, and weld and extend it, the portion to be welded is extended. It is necessary to construct a meeting room in which the corresponding groove excavation portion is widened, and in addition to the complexity of the composition of the meeting room for each welding site, welding work that requires skill especially at the bottom of the steel pipe in the groove frequently occurs.

For this reason, for example, even in a narrow place, the transportation and laying work of steel pipes can be carried out smoothly, and even if traffic control is performed, a light-duty device is used so that the work area can be accommodated by only one-sided traffic. In addition, there has been a strong demand for development of a steel pipe transportation laying work method or a transportation device that can reduce the number of times of welding and joining in a groove for extending a pipeline.

[0007]

The present invention is to solve the above-mentioned problems, and the means are as follows. (1) When laying steel pipes of a predetermined length in the excavation groove while sequentially joining them, a transfer member equipped with an elevating means is hung from above the excavation groove on the ground near the excavation groove at the buried portion and above the excavation groove. After passing, the steel pipe traverse movement device mounted on the upper traveling surface of the hand delivery member is raised to receive the steel pipe, and the steel pipe mounted on the steel pipe traverse movement device travels above the steel pipe traverse movement device. The surface is moved, conveyed to a position right above the site to be buried, and in a state where the steel pipe is suspended and held using the suspending means arranged on the excavation groove, after removing the transfer member, the steel pipe is suspended,
A method for laying and transporting a steel pipe, which is characterized in that the pipe is joined to an end of an already buried steel pipe and laid.

(2) Steel pipe conveying means, which is provided with a steel pipe holder placed on the ground or a means for moving back and forth on the ground, and excavated from below the steel pipe mounted on the steel pipe holder or the carriage. A steel pipe transporting device comprising: a transfer member having a length that can be hung over a groove and provided with an elevating means; and a steel pipe traversing moving device mounted on an upper traveling surface of the transfer member. (3) The steel pipe traversing device comprises a box or frame having an upper surface of a shape capable of stably supporting the steel pipe, and a transfer wheel is provided on the lower part of the box or frame to allow traveling on the upper surface of the transfer member. The steel pipe transporting device according to (2), characterized in that. (4) The steel pipe traverse movement device is composed of a box or frame having an upper surface portion having a shape capable of stably supporting the steel pipe, the lower surface portion of which is configured to be substantially flat, while the upper traveling surface of the transfer member is The steel pipe transporting device according to (2), characterized in that each of the flat pipe bearings is composed of a plurality of rollers and can travel on the traveling surface of the upper part of the transfer member.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A steel pipe holder or a steel pipe joining base and a steel pipe transfer carriage according to the present invention are
As described above, there is a restriction on the location, and the steel pipe must be near the excavation groove in which it should be laid (the welding work between the end faces of the steel pipe is the same as the conventional method, and is performed by the normal method). In addition, the long steel pipe after welding must be immediately transferred to the excavation trench in that state. Therefore, the inventors of the present invention have made various studies on a method for easily transferring a steel pipe, and as a result of accumulating experiments, the present invention has been completed. An example of the present invention will be described with reference to the drawings.

The drawings are for facilitating the understanding of the present invention, and the sizes and positional relationships of the devices and parts are slightly different from the actual ones, and only the parts necessary for explanation are shown. FIG. 1 is an overall view of a buried steel pipe as viewed from the side. For example, a steel pipe P mounted on a welding carriage 10 has an end face of 1
The entire circumference is welded at 9 and is held as a long steel pipe for burying.

FIG. 2 is an enlarged front view (cross section) of FIG. 1, showing the positional relationship between the steel pipe P to be buried and the excavation groove 1, showing the situation before the steel pipe laying work. A trolley 10 carrying a steel pipe P is located in the vicinity of the groove 1, while an excavation groove 1 in which the steel pipe P is laid is provided with an earth retaining structure 2 made of sheet pile or a panel to dam the earth and sand 4 on both sides of the excavation groove. The earth retaining structure 2 is supported by a crossbeam 5 in two or three stages in the height direction thereof to prevent the earth retaining structure 2 from collapsing due to earth pressure. In the figure, 11 is a turning roll, 12 is a truck wheel, and 13 is its axle.

FIG. 3 shows the next operation, that is, a state in which an appropriate number (three in this figure) of steel pipe traverse devices 15 for traversing the steel pipe of the present invention are installed below the steel pipe, and FIG. I saw it. Here, an operation for installing the steel pipe traversing device 15 and its function will be described with reference to FIG. The steel pipe traversing device includes a jack 20, a transfer member 31, and a steel pipe traversing pedestal 16 (hereinafter referred to as a steel pipe cradle), and the installed steel pipe traversing devices perform substantially the same operation by the same operation. First, however, the lifting jack 20 is placed below the steel pipe P, and the passing member 31 is detachably hung over the upper surface of the excavation groove 1 on the jack 20. Thereafter, the steel pipe pedestal 16a is placed on the upper traveling surface of the transfer member 31 (so that the lower surface of the steel pipe and the upper surface of the steel pipe pedestal are substantially aligned).

FIG. 5 shows the operation in the order of steps. The cylinder of the jack 20 is operated to gradually raise the transfer member 31 so that the upper surface of the steel pipe pedestal 16a is the steel pipe P.
The cylinder continues to move up even after it contacts the lower part of the cylinder, and stops if it rises until the lower position of the steel pipe is located above the upper end position of the turning roll (Fig. 5a). Next, the steel pipe pedestal 16a on which the steel pipe P is mounted is passed through the transfer member 3
Move the upper running surface of No. 1 and dodge the steel pipe from the turning roll (Fig. 5b).

In FIG. 6, the steel pipe pedestal 16a is replaced by the transfer member 3
1 shows a state in which the upper running surface is moved and the steel pipe P is transferred to a position directly above the steel pipe burying in the excavation groove 1. In such a state, a required number of, for example, gate-shaped support bases 50 are installed as suspending means for holding the steel pipe across the excavation groove 1 and the steel pipe support 16a. A suspension jig 52 for suspending the steel pipe P, for example, is provided on the upper portion of the support base 50. In this state, the suspension jig 52 is operated to move the long steel pipe P mounted on the steel pipe support 16a. The steel pipe pedestal 16a is once hung up to be in an empty state. By such an operation, the steel pipe P stands by at a position directly above the burying position while being suspended and held for burying.

Although not particularly shown in the drawing of the steel pipe, an operation reverse to that for transferring the steel is performed. That is, after the empty steel pipe cradle 16a is moved to the original position by moving over the upper traveling surface of the transfer member 31, the transfer member 31 is removed from the excavation groove 1
Remove from above. By doing so, the obstacles when the steel pipe P is buried on the excavation trench 1 is eliminated. As for the laying of the steel pipe, the upper cutting beam 5a in the excavation groove is removed, the steel pipe P is lowered to a predetermined position, the cutting beam 5a is attached again, and then the cutting beam 5b is removed, as is usually done. The steel pipe P is dropped to the bottom of the excavation groove 1, and the steel pipe is buried with earth and sand as soon as the work such as welding at the meeting place is completed, and the laying is completed.

In the above description, the truck 1 for obtaining the long steel pipe
0 (including those having a function of transporting steel pipes and / or welding and holding steel pipes) has been described as an example, but the present invention is not limited to this, and a means for transporting steel pipes is not provided. If the steel pipe traverse device 15 can be installed below the steel pipe even if it is a steel pipe holder for simply mounting the steel pipe or a steel pipe joining worktable for welding the steel pipe, the steel pipe P is mounted on the steel pipe pedestal 16. The transfer can be performed by the same operation as described above, and there is no particular limitation on the standby state for burying the steel pipe P. Further, the steel pipe traversing device 15 of the present invention is a long steel pipe P.
The number of bases is determined according to the length, but at least two or more bases are required.

The outline of the working operation of the present invention has been described above, but the main characteristic part of the present invention is the steel pipe traverse device 1.
5, a transfer member 31 that is installed by straddling the excavation groove 1, a jack 20 that lifts the transfer member 31, a steel pipe pedestal 16 that moves the upper traveling surface of the transfer member 31, and a traveling means of the steel pipe pedestal 16. Since this is the case, that point will be described in detail below.

Since the connecting member 31 and the jack 20 of the steel pipe traversing device 15 of the present invention are symmetrical in the longitudinal direction, only one end side thereof is shown in FIG. 7 in a side view, and in FIG. The front view is shown. First, when the transfer member 31 is installed across the upper surface of the excavation groove 1 from below the steel pipe P, the jack 20 for moving the transfer member 31 up and down is installed at the lower part thereof. In order to prevent the influence of the unevenness of (1), the substrate 30 (mainly a steel plate) is placed on the ground surface under the ground plate 22 attached to the jack 20. Then, on the top plate 21 of the jack 20 on the base plate 30, the transfer member 31 in which the channel steel web 33 is fixed to the H-shaped steel flange surface 42 is installed. In this case, the inner surface side of the web 33 of the channel steel corresponds to the traveling surface of the steel pipe pedestal 16.

In order to maintain the levelness of the jack 20 from the inclination of the base plate 30, a plurality of horizontal adjusting devices 35a are provided near the periphery of the bottom plate 22 below the jack. For example,
When the base plate 22 is circular, three or four are evenly distributed around the periphery,
In case of square shape, a total of 4 horizontal adjustment bolts 37 are provided at each corner.
A screw hole 38a to be screwed with a is machined, and by rotating the bolt 37a at an appropriate position, the tip of the bolt in contact with the upper surface of the lower substrate 30 is projected, and the jack base plate 22
You can tilt it freely to maintain the levelness.

Further, the horizontality of the transfer member 31 with the digging groove 1 in between can be easily adjusted by slightly extending the cylinder of the lower jack 20, whichever is lower. In this case, bolt 3
If a handle is attached to the upper part of the bolt 7 in order to facilitate the rotation of the bolt 7, the bolt 37 can be easily rotated manually.

Further, the transfer member 31 may be provided with a leveling device 35b for adjusting a slight levelness. This uses the lower surface flange 42 of the H-shaped steel of the transfer member 31 in the same manner as maintaining the horizontality of the jack 20, and a part thereof is screwed with a horizontal adjustment bolt 37b for adjusting the height of the transfer member 31. The screw hole 38b to be turned is turned. The bolts 37b are provided on the left and right with the H-shaped steel web 43 interposed therebetween. This horizontal adjustment device 35b has a total of four (6 in some cases) at both ends of the transfer member 31.
Since the attachment and the tip of the bolt 37b are in contact with the top plate 21 of the jack 20, it is possible to accurately adjust the inclination of the transfer member 31 to the front / rear and left / right by rotating the appropriate bolt 37b.

Further, a horizontal adjusting plate (not shown) which penetrates the H-shaped steel web 43 and projects to the outside of the H-shaped steel flange 42 is provided, and the same processing as that provided on the flange is applied to the horizontal adjusting plate, It is also possible to perform the same operation. Reference numeral 47 is a stopper attached near the end of the transfer member 31 in order to prevent the steel pipe pedestal 16 from overrunning, and a hole is formed in the transfer member 31 for free removal.
And is inserted into the hole 49 and fixed by the collar body 48 at a constant height.

The transfer member 31 may be a combination of H-shaped steel and grooved steel, or a structural material in which other shaped steels are combined, a rail, etc., and may be a steel pipe pedestal 1 on which a steel pipe P is mounted.
No special structure is required as long as it supports the load of No. 6 and allows the steel pipe pedestal 16 to travel. Further, regarding the steel pipe traversing device 15, when the portion excluding the steel pipe pedestal 16 is integrally formed, it is convenient for setting at a predetermined place or maintaining the levelness, but a heavy object must be moved during handling. It is inconvenient to move. Therefore, which component is to be integrated or is to be a separate component in consideration of the balance between the two may be determined in consideration of the properties of the component.

Next, the steel pipe pedestal 16 that runs on the above-mentioned transfer member is of a simple structure because it is used only for the transverse transfer of the steel pipe, one of which is the side view of FIG. 7 and FIG. As shown in the front view of Fig. 1, the main body of the steel pipe cradle 16a is composed of a frame or a box, and the upper surface thereof has a shape substantially the same as the outer diameter surface of the steel pipe so that the steel pipe can be stably supported. It suffices that it has a structure in which four wheels 17 penetrating the axle 18 are attached to the lower part thereof and that the traveling surface of the transfer member 31 in the upper groove shape can be smoothly moved.

As shown in the side view of FIG. 9 and the front view of FIG. 10, the other one is, for example, a flat structure in which an appropriate number of rollers 46 are arranged on the flange portion 32 of the upper channel steel of the transfer member 31. If the one equipped with the bearing 45 is adopted, the steel pipe pedestal 16b has substantially the same shape as the upper surface of the steel pipe pedestal 16a as described above, and it is not necessary to hold the wheels under the steel pipe pedestal 16b. A flat lower surface portion is formed on 16b, and the rolling and rotating force of the roller 46 located therebelow allows the steel pipe pedestal 16b on which the steel pipe is mounted to easily travel.

Further, when the bridging member 31 is stretched over the excavation groove, it will be an obstacle when burying the steel pipe. Therefore, depending on the excavation groove width, a hinge is used so that it can be bent with a width slightly longer than the groove width. When the insertion method is adopted and placed, the upper surface of the excavation groove 1 can be easily opened, and the transfer member 3
Since it is short even when it is moved, it is preferable because handling is easy.

As described above, according to the present invention, the steel pipe traversing device is
Although the transverse transfer of the steel pipe has been described, the present invention can also be applied to the longitudinal transfer of the steel pipe, and for example, the longitudinal movement of the steel pipe can be easily performed by changing the shape of the steel pipe cradle 16 to a suitable shape. In this case, the steel pipe traversing device may be read as a steel pipe traversing device, and the radix thereof may be one, and depending on the transfer distance, a plurality of transfer members 31 may be connected in series.

[0028]

INDUSTRIAL APPLICABILITY The present invention is suitable for the laying work of steel pipes at a pipe laying construction site for gas, water, etc., and is particularly useful for easing traffic restrictions on narrow roads, streamlining the laying work, and reducing the number of personnel. It greatly contributes to labor saving, and is naturally applicable not only to the construction site but also to other places, which is an industrially useful invention.

[Brief description of drawings]

FIG. 1 is a side view showing a standby state of a welded steel pipe.

FIG. 2 is a front view of FIG. 1 as viewed from the front, showing the positional relationship with the excavation trench.

FIG. 3 is a side view showing a transverse position of the steel pipe installed below the welded steel pipe.

FIG. 4 is a front view of FIG.

FIG. 5 is a diagram showing the operation of the steel pipe traversing device in the order of steps.

FIG. 6 is a view showing a moving state of the steel pipe above the steel pipe burying position.

FIG. 7 is a side view showing an example of a steel pipe traversing device and a steel pipe pedestal.

FIG. 8 is a front view of FIG. 7;

FIG. 9 is a side view showing another example of the steel pipe traversing device and the steel pipe pedestal.

FIG. 10 is a front view of FIG.

[Explanation of symbols]

 1 excavation ditch 2 earth retaining work 4 earth and sand 5 cutting beam 10 bogie 11 turning roll 12 bogie wheel 13 axle 15 steel pipe traverse device 16a, b steel pipe pedestal 17 wheel 18 axle 19 joint 20 jack 21 top plate 22 main plate 30 substrate 31 handing over Member 32 Channel steel flange 33 Channel steel web 35a, b Horizontal adjustment device 37a, b Horizontal adjustment bolt 38a, b Horizontal adjustment screw hole 40 Breath material 42 H-shaped flange 43 H-shaped steel web 45 Flat bearing 46 Roller 47 Stopper 48 Collar 49 Perforation 50 Portal Support 51 Hook 52 Hanging Jig P Steel Pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuaki Iida 1188-82, Oishimachi, Midori-ku, Chiba-shi, Chiba (72) Inventor Kuniyoshi Takahashi 2-6-3 Otemachi, Chiyoda-ku, Tokyo Shin Nippon Steel Corporation (72) Inventor Nobuo Oba 1-3-21 Nihonbashi Horidomecho, Chuo-ku, Tokyo Nittetsu Civil Construction Co., Ltd. (72) Inventor Tsunehiko Hayashi 2-6-3 Otemachi, Chiyoda-ku, Tokyo Shin Nippon Steel Shares Ltd. In-house (72) Inventor Koji Yoshigai 2-6-3 Otemachi, Chiyoda-ku, Tokyo Within Nippon Steel Corporation (72) Inventor Tamiji Iimura 1-21 Reisen, Hodogaya-ku, Yokohama-shi, Kanagawa

Claims (4)

[Claims] 1. A laying member provided with an elevating means from below a steel pipe standing on the ground in the vicinity of the digging groove at the buried portion to above the digging groove when sequentially laying steel pipes of a predetermined length in the digging groove. And the steel pipe traverse movement device mounted on the upper traveling surface of the delivery member receives the steel pipe, and the steel pipe mounted on the steel pipe traverse movement device receives the steel pipe together with the steel pipe traverse movement device. The upper running surface is moved, transported to the position just above the site to be buried, and the steel pipe is suspended and held by the suspending means placed on the excavation groove, after removing the passing member, the steel pipe is suspended and the existing steel pipe is buried. A method for laying and transporting a steel pipe, which is characterized in that the steel pipe is laid by being joined to the end portion of the steel pipe. 2. A steel pipe conveying means, comprising a steel pipe holder placed on the ground or a truck provided with means for moving back and forth on the ground, and a steel pipe mounted on the steel pipe holder or truck from above the excavation groove. A steel pipe transporting device comprising: a transfer member having a length that can be hung over the transfer member and provided with an elevating means, and a steel pipe traversing moving device mounted on an upper traveling surface of the transfer member. 3. The steel pipe traversing moving device is composed of a box body or a frame body having an upper surface portion having a shape capable of stably supporting the steel pipe,
The steel pipe transporting apparatus according to claim 2, wherein the lower part thereof is equipped with a transition wheel so that the wheel can travel on the upper traveling surface of the transfer member. 4. The steel pipe traversing moving device is composed of a box body or a frame body having an upper surface portion having a shape capable of stably supporting the steel pipe,
The lower surface of the transfer member has a substantially flat shape. On the other hand, the upper running surface of the transfer member is composed of flat bearings each composed of a plurality of rollers, so that the upper surface of the transfer member can travel. Claim 2
The steel pipe transport device described in.