JPS6145185A - Pipeline laying apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention relates to an apparatus for installing conduits, such as drainage pipes, in trenches filled with cement grout or mud.

According to known construction methods, a trench is dug in the soil using cement grout or bentonite slurry, commonly called grout, and drainage pipes are installed, and the slurry is solidified inside the trench.

The present invention is for installing conduits inside trenches filled with cement grout or the like.

The common method to date for laying such conduits, used for example as drainage pipes, is to assemble the conduit elements outside the trench and then use the cement-rich soil commonly used to excavate the trench. The whole can be submerged in bentonite mud and then the grout can be allowed to solidify as it is, or the mud that initially filled the trench can be replaced with concrete or cement grout and the pipe can be sealed by any means within the trench. There is a way to do this.

0. The above method sometimes presents difficulties, since all the elements have to be assembled outside the trench. In fact, this assembly method cannot be carried out satisfactorily if the trench excavation is carried out under the protection of cement or grout-rich mud, because the pre-assembled pipes outside the trench This is because the cement or grout usually solidifies before the element can be installed.

The present invention is directed to a device for continuously installing conduit elements in a trench containing a wall protection fluid such as cement mortar or bentonite mud. A device for continuously laying elements of a conduit in a trench filled with a protective fluid, comprising: a saxilan device;
a suction pipe connected to the suction pipe, a closure device to which the suction pipe is attached and installed in the opening of one of the first elements of the pipe, and a closure device of the second element to be connected to said first element; temporarily attached to one opening, and placing the non-occluded openings of the two elements adjacent to each other so that when the Suxilan device is actuated to draw suction through the suction tube, the second element a temporary closure device that contacts the elements of the pipe and generates a negative pressure to assist in firmly joining the two elements together.

According to the present invention, by using the wall surface protection fluid flow (hereinafter referred to as mud flow) and negative pressure created by the Saxilan device attached to the first installed element, one of the other different elements is continuously They can be fitted so that one presses against the other, or one can be fitted into the other.

According to the method of the invention, each time an element is connected, it can be checked whether the previous elements fit into each other correctly. If the fit is not accurate, you will not be able to obtain mudflow or negative pressure for the element you are trying to connect.

Similarly, the present invention also aims at a guide device for bringing two openings of elements to be connected closer together, and the above-mentioned device comprises two hanging fittings for pressing the elements to be connected, and an opening of the elements to be connected. It is characterized in that it includes a third hanging fitting that is in the extension of the section and wraps around the previously installed element.

The invention makes it possible to easily and quickly carry out the serial installation of various pipe elements, which are used for example for the construction of drainage pipes, in trenches. The element is held and fixed by a sling during and after installation, the position of the sling itself being marked with respect to a fixing point outside the trench.

The element installed according to the invention is a cut pipe, but it can also be a shaped pipe such as an elbow pipe, a T-tube or a manhole. All holes, except those to be connected, must be temporarily closed to allow mudflow and negative pressure to occur inside the whole.

BRIEF DESCRIPTION OF THE DRAWINGS For a detailed understanding of the invention, reference will now be made, by way of example only and without limitation, to the accompanying drawings, in which: FIG.

Looking at the sectional view of FIG. 1, the manhole 1 is placed in a trench 2 and supported by a hanging rope 3, the upper end of which is fixed to a horizontal member 4 provided across the trench 2. The manhole 1 is fixed and sealed to the element 5 of the conduit, which is assumed to have already been atted.

The conduit must be continuous through the manhole opening 6. Note that this opening 6 constitutes the first element of the conduit.

According to the implementation of the invention described here, said opening (first element) 6 is closed by a metal plate 7 with a collar 8 and an annular seal 9, i.e. a collar 8, an annular seal 9. and metal plate 7 constitute a closure device, a collar 8 is fitted inside the opening (first element) 6, and an annular packing 9 is used for sealing between the inside and outside of the manhole. Of course, as for the type of gasket, modified types can be used.

The suction pipe 10 that reaches the plate 7 and the horizontal member is connected at its upper part to a suction device, such as a suction pump (not shown), which generates negative pressure.

The plate 7 has a guide mechanism on the outside of the manhole l,
In this figure, the guide mechanism is comprised of a group of pointed pipes 11 provided around the hole 6. Since the element of the pipe 12 is easily positioned by the guide mechanism, its engagement portion 13 can be located near the opening 6 of the manhole 1.

Pipe element 12 (second element) is a suspension rope 14
The latter slings locate the pipe element from the height of the trench.

The other end 15 of the pipe element 12 is closed with a temporary closure device 16 consisting of a steel plate, which has elastic arms 16a and can easily penetrate into the interior of the pipe 12.

According to the invention, after the installation of the closure plate 7 supported by any means perpendicular to the hole 6 of the manhole 1, the closure device 16 is installed at the end 15 of the pipe before the pipe element 12 is lowered. Just that is enough.

The pipe element 12 is also gradually submerged in the grout or muddy water contained in the trench 2, and its end 13 is guided in front of the guide mechanism 11 by the markings on the upper part of the sling 14, so that it can be easily fitted into the opening. You can proceed as far as part 6. The negative pressure transmitted from the suction pipe 10 into the interior of the element 12 exerts a large axial force by the closure device 16, which force draws the end 13 of the pipe element 12 into the hole 6 of the manhole 1.

More specifically, by suction through the suction pipe by the suction device, the inside of the opening (i first element) 6 and the pipe element (second element) 1 are
A flow of wall protection fluid toward the suction pipe near the end (non-obstructed opening) 13 of 2 occurs (laharflow), and this mudflow guides the second element toward the first element, and each non-blocking The occlusion openings are brought into contact. Due to this contact, only the mudflow within the element is displaced via the suction pipe, creating a negative pressure within the element. The elements are tightly fitted and joined together due to the negative and positive elements.

Remove the left sling 14, adjust the right sling 14, and remove the pipe 1.
2 can be fitted into the hole 6 of the manhole 1 and maintained in a predetermined direction.

It is then only necessary to stop the mud flow and the negative pressure action in the suction pipe 10 and remove the closure device W, 16 at the end 15 of the pipe 12, for this purpose it is necessary, for example, to It is only necessary to pull a cable (not shown) which is connected and rises to the level of the trench.

FIG. 2 shows the pipe supported by the sling 14 and placed in the position described above. This figure also shows the device 21.
The pipe element 17 is shown supported by two slings 18, and the device itself is supported by two slings 18. The pipe element 17 includes at its left end a tulip-shaped object 19 which serves as a female member, into which the male end 15 of the pipe element 12 is inserted.

The other end 20 of the pipe element 17 is connected to the above-mentioned obstruction 16.
accept.

FIG. 2 shows a device 2 equipped with positioning hanging fittings 22 and 23 of 211M and a guide hanging fitting 24 as a third hanging fitting.
1 is shown diagrammatically, the former hanging fitting fixes the device to the pipe element 17, while the latter hanging fitting is positioned to straddle the end 15 of the pipe element 12 and The end 15 of the pipe 12 is smoothly inserted into the inside of the tulip-like object 19 of 17.

After pulling out the device 21 and its support hanging fittings 22, 23 and guide hanging fittings 24, the pipe element 17 can then be immobilized in the correct position relative to the trench.

Then, after removing the negative pressure inside the pipe, operation resumes to remove the blockage 16 and achieve the desired length of conduit, as described above.

FIG. 4 schematically shows an elevational view of the hanging fitting 23 (or hanging fitting 22).

4 shows the pipe 17 and the upper part of the hanger 23, the latter comprising two levers 25 articulated at 26 of the hanger 23. A jack 2 is attached to the lower end of the lever 25.
A shoe 27 is included which places a fulcrum on the pipe 17 when 8 presses against the upper end 29 of the lever 25.

With the structure described above, even if the pipe 17 is outside the trench, the device 21 can be easily positioned and fixed to the pipe.

Once the whole is submerged in the trench, it is only necessary to loosen the action of the jacks 28, so that it is supported flat inside the trench by all suitable means and, when necessary, the equipment 21 can be released and pulled out of the trench, allowing the installation of another pipe element. You can use this again for.

Third! ! 1I shows the pipe 12, the guide device and its third hanging fitting 24. The tip of this hanging fitting is widened at 30 towards the inside, and the above hanging fitting is attached to the end 15 of the pipe element 12 from above. can be easily fitted.

In the drawing, the three hanging fittings 22, 23, 24 are schematically shown as being connected by the bar 21, but the actual connection between the three hanging fittings does not have the necessary rigidity. Needless to say, it will be done.

The device according to the invention makes it possible to simply, quickly and economically install continuous elements of conduit in trenches filled with cement grout or bentonitic mud.

With the device according to the invention, each time each successive element is installed, it can be checked whether the previous successive elements have been correctly installed. The reason is that mud flow and negative pressure effects are distributed throughout the installed continuous elements.

The device has been described above, showing how to secure two pipe elements in succession in a manhole. It goes without saying that the elements of the conduit can be made more complex, and when the diameter of the conduit is changed, the elbow pipe, branch pipe or relay pipe can be fixed by the above method.

The conduit elements can be made of various materials, for example asbestos or cement compounds. Similarly, 1
It is clear that the guide device for guiding the end of one element close to the end of an already installed element may be implemented in a different manner without departing from the gist of the invention.

[Brief explanation of the drawing]

15th! 1 is a schematic cross-sectional view showing an apparatus for installing pipe elements in an existing manhole according to the invention; FIG. FIG. 2 is a sectional view schematically showing a device for installing a new element in an existing pipe element. FIG. 3 is a schematic cross-sectional view taken along line mm in FIG. 2. FIG. 4 is a schematic sectional view taken along the line y-rv in FIG. 2.

Claims (2)

[Claims] (1) In a device that continuously lays conduit elements in a trench filled with a wall protection fluid such as cement grout or bentonite mud, a suction device, a suction pipe connected to the suction device, and a suction pipe are used. a closure device attached and attached to the opening of one of the first elements of the conduit, and one of the second elements to be connected to said first element;
the second element is temporarily attached to one opening, and the unobstructed openings of the two elements are placed adjacent to each other, and when the suction device is actuated to draw suction through the suction tube, the second element A conduit laying device comprising: a temporary closure device that comes into contact with the elements and generates negative pressure to assist in firmly joining two elements together. (2) A device for removably hanging the second element is provided, and the hanging device has a portion for guiding the second element to the first element. The pipe laying device described in .