JPH0137269Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a pipe burying device used when burying a sewer pipe or the like by filling an cut trench with muddy water and sinking the pipe therein.

[Technical background of the invention and its problems]

In recent years, some methods have been put into practical use in which pipe bodies, such as sewer pipes, are sunk into cut-and-cover trenches filled with muddy water and installed in series.

Conventionally, each pipe body has been sunk in this process. However, this requires submersion work each time, and the workability is extremely poor. Moreover, it is extremely difficult to connect the next submerged pipe to the previous submerged pipe in muddy water because the pipe cannot be visually observed.

Furthermore, this type of burying requires straightness of the tube group, which is extremely difficult to do when burying the tubes individually.

On the other hand, although a concrete pipe or the like may be used as the pipe body, a lightweight pipe body such as a vinyl chloride pipe may also be used. This type of lightweight pipe body often has difficulty sinking under its own weight due to muddy water. Therefore, in order to increase the sinking force, steel materials such as H-shaped steel or channel steel are attached to the lower part of the pipe body, or to both the upper and lower parts. In this case, the steel material is placed along the tube and secured by winding a steel band around key points. However, in order to prevent the steel material from easily coming off the pipe, the band must be tightened strongly, but if the band is tightened too tightly, the pipe may bend or the cross section may become deformed if the pipe is made of vinyl chloride. . Furthermore, due to the deformation of the tube body,
Sometimes the tube cannot be set in the desired position. Therefore, installation of steel materials requires careful attention, which leads to a decrease in workability.

[Purpose of invention]

The present invention solves the above-mentioned conventional problems, significantly improves workability when burying lightweight pipes, facilitates straight burying, and provides upper support even for lightweight pipes. It is an object of the present invention to provide a device for burying a pipe body that is easy to bury due to the presence of the member and the lower support member.

[Structure of the idea]

To achieve this purpose, the present invention is for submerging a plurality of pipes connected in the longitudinal direction in muddy water, and the inner diameter is substantially smaller than the outer diameter of the pipes to be buried. a plurality of annular holders separate from the target tube and surrounding the target tube;
An upper support member and a lower support member made of steel that are elongated, have virtually no bending, extend along the continuous target pipe group, and are arranged at the upper and lower parts of the pipes, respectively, and can be freely attached to and detached from the upper support member. and a suspension member disposed on the ground to hold the upper part on the ground, each of the holders being arranged at intervals in the longitudinal direction of the target tube and fixed to the upper support member and the lower support member. It is characterized by this.

[Specific example of idea]

The present invention will be explained below using specific examples shown in the drawings.

FIGS. 1 to 3 show an example of the apparatus of the present invention, and 1 is a pipe to be buried, for example, a vinyl chloride pipe. Reference numeral 2 denotes an annular holder, which in the illustrated example is designed to be assembled in half. At both ends of the ring pieces 21, 22, there are flange parts 21A, 21B, 22A, 22 that protrude from the wall thickness of the main body.
B is formed. Furthermore, the upper flange portion 21
A, 22A have upper opening insertion grooves 23a, 24a.
are formed in the width direction, and bolt insertion holes 25a and 26a are further formed in the thickness direction. Bolt insertion holes 27 are provided in the lower flange portions 21B and 22B.
b, 28b are formed.

Reference numerals 3 and 4 denote an upper support member and a lower support member respectively made of channel steel, and the upper support member 3 has its flange portion inserted into insertion grooves 23a and 24a,
The connecting bolt 5 and nut 6 inserted into the bolt insertion holes 25a and 26a are connected to the annular holder 2 by assembling the ring pieces 21 and 22. The lower support member 4 includes a lower flange portion 21
It is arranged so as to wrap around and straddle B and 22B, and is connected by a connecting bolt 7 and a nut 8.

On the other hand, on the upper surface of the upper support member 3, a suspender 9 having an internal thread formed therein is integrated by welding or the like, and a suspender 10 made of a threaded rod is screwed onto this.

Such a tube embedding device is used as follows. That is, as shown in FIGS. 4 and 5, first, a trench 12 is excavated while being filled with slurry such as bentonite slurry 11. 13 is a guide wall. Next, as shown in FIG. 6, a predetermined number of unit tubes are arranged in series on the ground, and an annular holder 2 and support members 3, 4 are attached to each unit tube. This attachment is carried out by first covering the tubular body 1 with the ring pieces 21 and 22, arranging the supporting members 3 and 4, and assembling them with the connecting bolts 5 and 7. Finally, the suspension member 10 is screwed onto the suspension receptacle 9. The tube group of a predetermined length obtained in this way is then suspended via each suspension member 10 by an interlocking type electric chain block 15 etc. provided on the pedestal 14, as shown in FIG. It is sunk into the trench 12. after that,
As shown in Figure 8, use a leveling rod 16, etc. to confirm the sinking depth (position), and when it reaches the correct depth,
The upper part of the hanging member 10 is fixed to a support stand 17 made of H-shaped steel or the like, and the muddy water 11 is waited for to solidify. Note that illustration of the annular holder 2 and supporting members 3 and 4 is omitted in FIG. Once muddy water 11 has solidified,
Rotate each suspension member 10 in the opposite direction, and
Remove and remove. Other parts will be buried.

By the way, although the annular holder in the above example is of a split type, it may be an integral annular body if necessary. In this case, it is attached by fitting in relatively from the end of the tube. Moreover, when using a split type, one flange part may be pivotally connected to each other, and the other flange parts may be made to expand and close each other.

Although the mounting structure of the supporting members 3 and 4 to the annular holder is not limited to the above example,
Bolt connection at the flange part can be easily and firmly fixed. Note that the lower support member 4 can be omitted when an integral annular holder or the like is used. As the support members 3 and 4, in addition to channel steel, H-beam steel or other appropriately shaped members without deflection can be used.

[Effect of idea]

As described above, according to the present invention, multiple pipe bodies are sunk at the same time, which improves work efficiency.
In addition, since each pipe body is connected on the ground, construction efficiency is improved compared to connecting them in muddy water.

In addition, we provided a support member made of steel that also functions as a sinking force increasing member, so if it is a lightweight pipe, it is easy to sink it while filling the pipe with water, while if it is a heavy pipe, it can be placed inside the pipe. There is no need to fill it with water and then sink it, making the installation process easier. Furthermore, since the supporting member does not bend, when the whole is lifted up, there is no bending deformation even if the tube is made of vinyl chloride or the like.
Furthermore, since the annular holder attached to each target tube is attached to a support member provided along the group of connected target tubes, the presence of the support member allows the connected tubes to be moved vertically and horizontally. This makes it possible to level the tube group and prevent it from swinging from side to side, which has been extremely difficult in the past, in an extremely simple and stable manner.

In this way, the entire sinking work becomes smooth, and
This provides the advantage of allowing accurate placement.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the device of the present invention, Figure 2 is a side view of the ring piece, Figure 3 is a front view of the main part of the tube held by the embedding device of the present invention, and Figures 4 to 8 are FIG. 3 is a sectional view showing the submergence work in the order of construction. DESCRIPTION OF SYMBOLS 1... Pipe body, 2... Annular holder, 3, 4... Supporting member, 21, 22... Ring piece, 5, 7... Connection bolt, 9... Hanging bracket, 10... Hanging member ,1
1...Slurry, 12...Trench.

Claims (1)

[Scope of utility model registration request] It is intended to be submerged in muddy water with a plurality of pipes connected in the longitudinal direction, and the inner diameter is substantially larger than the outer diameter of the target pipe to be buried, and the pipe surrounds the target pipe. A plurality of annular holders separate from the target tubes, and an elongated upper part made of steel that is substantially unflexible, extends along the continuous target tube group, and is disposed above and below the group, respectively. A support member, a lower support member, and a suspension member that is detachably arranged on the upper support member and holds the upper part on the ground, and each of the holders is arranged at intervals in the longitudinal direction of the target pipe body. A pipe embedding device characterized in that the pipe body embedding device is fixed to an upper support member and a lower support member.