JP2001132077A - Immersion method of tube and tube transferable blocking device used therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid decrease in a pipe body guide force, even though performing a connection work, after a third pipe body and to reduce the amount of remaining stabilizing liquid in a laid pipe body. SOLUTION: When performing the connection for the pipe body PU2 after a third pipe body, a blocking device 10 is moved to the inside of the pipe body PU at the end in the pipe bodies for which the laying and connection have been completed, and the connection is carried out by suction via the suction pipe 12 from the relevant position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for submerging a pipe, which connects the pipes by suctioning a stabilizing liquid, and to a movable closing device in a pipe used for the method.

[0002]

2. Description of the Related Art In recent years, when a pipe such as a sewer pipe is sunk in a slot and buried therein, a plurality of pipes are replaced with a so-called open-cutting method in which the pipe is sunk into the slot and connected one by one. The method of submerging a group of pipes in a digging trench filled with a stabilizing liquid and connecting them to each other or manholes is widely used to minimize traffic stoppage, particularly in urban areas.

[0003] The outline of the submerging method by the stable liquid excavation will be described. First, as shown in Fig. 1, guide walls 1, 1 are constructed at the submerged position of a pipe P and on both sides of a human hole M, M. . Next, although not shown, a predetermined distance from the starting end side human hole M between the guide walls 1 and 1 is set.
For example, up to the next human hole M with a power shovel
The excavation groove D is excavated while filling the stable liquid B such as bentonite muddy water, and the human hole 2 is laid down at least in the human hole M at the starting end of the excavation groove D.

On the ground, on the ground, as shown in FIGS. 2 and 3, a plurality of pipes P, P,... A lower support member 4 such as a shaped steel is applied, and the lower support member 4 is wound around a pipe P with a wire 5 or the like to be integrated. A plurality of couplers 6 are fixed to the upper surface of the upper support member 3 of the integrated connection pipe PU at intervals in the longitudinal direction.
Gevin bar (screw steel bar) for position monitoring and hanging support
7 is screwed.

After the completion of the setup, for example, the connecting pipe PU is connected to the connecting pipe PU via the wire 5 wound around the connecting pipe PU by the chain block 9A using the portal crane scaffold 8 assembled as a structure as a support. Is suspended, and the support by the chain 9B is sequentially dropped, and is suspended and lowered to a position where the human hole 2 is to be connected. FIG. 3 shows this subsidence completion state. Thereafter, as shown in FIG. 4, the erection member 20 erected between the guide walls 1 and 1 is connected to the suspension support Gevin bar 7 by a nut 21 to suspend and support the connection pipe PU.

Next, whether or not the connecting pipe PU is suspended and supported at the design position (depth direction position and groove width direction position) is determined by the Gevin rod 7 projecting from the stable liquid level and the predetermined portion of the pipe body. Is confirmed by the position of the uki F connected via the connecting yarn. When the sunk position of the pipe is shifted, an H-section steel is erected on the side of the sunk pipe, and the H-section steel is pressed against the side of the pipe and moved in the groove width direction to adjust the sunk position. .

[0007] Thereafter, a solidifying material such as cement milk is poured into the stabilizing liquid B in the excavation groove D and the air is stirred to solidify the stabilizing liquid B. Completion of this solidification and 1 to
After a curing period of about three days, the worker infiltrates the human hole 2 and digs the solidified muddy water portion as shown in FIG. 5 to penetrate between the human hole 2 and the pipe P. A short pipe P 'for connection is inserted into the through-hole from the inside of the human hole 2, and a gap around the short pipe P' is filled with mortar to stop water.

[0008] However, in such a method of submerging a pipe, there is a problem that the pipe connection is difficult and complicated, and to solve this problem, Japanese Patent Publication No. Sho 63-5767 discloses a method for solving this problem.
Patent Document 3 discloses a technique for interconnecting pipes using a stable liquid flow by suction of a stable liquid (hereinafter referred to as prior art).
Has been proposed. An outline of this prior art will be described. First, as shown in FIG. 6, a stable liquid of a stabilizing liquid is supplied to a pipe 131 of a first pipe 130 (a connecting pipe portion provided in a human hole 102 in the illustrated example) laid in advance. The closing device 110 to which the suction pipe 112 is attached is fixed to close the pipe 131, and the second pipe 230 whose front end is closed by the temporary lid 250 (closing body) is replaced with the first pipe 230. 130 and is spaced apart from one end. Thereafter, the closing device 11
The second tubular body of the suction pipe 230 sucks the stable liquid B of the wrinkle 230 through the suction pipe 112, and generates a flow of the stable liquid B from the periphery toward one end of the first tubular body 130, and puts it on this flow. Second
The base end of the tubular body 230 is guided to one end of the first tubular body 130, and the two tubular bodies 230, 130 are connected and integrated.

Next, a third pipe 230 is
A preparation stage for connecting the pipe 330 is started. First,
The temporary lid 250 attached to the tip opening of the second tube 230 is removed. At this time, the closing device 110 that closes the pipe 131 of the first pipe 130 is not moved since it is fixed to the first pipe 130.

[0010] Thereafter, as shown in FIG. 7, the base end of the third pipe 330 whose front end is closed by the provisional lid 350 is opposed to the front end of the second pipe 230 and is spaced apart. Then, the closing device 10 for closing the inside of the first tubular body 130
The third tube 330 (not shown in the figure) sucks the wrinkle-stabilizing liquid B through the second tube 230, the first tube 130, and the suction tube 120 in this order. , A flow of the stabilizing liquid B is generated toward the distal end of the second tubular body 230, and the base end of the third tubular body 330 is guided to the leading end of the second tubular body 230 along with this flow, and Connect and unite the body.

Thereafter, if necessary, a fourth tube and a fifth tube are laid in the same manner as the third tube.

[0012]

However, in the prior art, since the closing device having the suction tube attached thereto is fixed to the starting tube, the prior art is connected while connecting the tubes in a stable liquid. It is unsuitable when three or more pipes including the laid pipe are laid sequentially.

In other words, in the prior art, when connecting the third and subsequent tubes, the closing device is always fixed to the starting tube, and from that position, the tube already connected to the starting tube is connected. The stable liquid will be sucked through the body.
Therefore, the prior art essentially had a problem that as the number of connected tubes increases after the third tube, the tube guiding force due to suction decreases.

Further, after the connection of the pipes is completed, the stable liquid remains in substantially the entirety of the connection pipe from the start end pipe to the end pipe, and it is necessary to remove and dispose of such a large amount of residual liquid. Was also a problem.

Accordingly, a main object of the present invention is to prevent a decrease in tube guiding force even when a third or subsequent tube is connected, and to reduce a residual stable liquid amount in a laid tube. Is to reduce it.

[0016]

According to the present invention, which has solved the above-mentioned problems, at least three pipes are sequentially laid and buried in a stable liquid in a digging trench, and the pipes are sequentially connected to each other in a stable liquid. In the method of burying a pipe, a first pipe is laid in a digging groove, and a closing device equipped with a suction pipe for a stable liquid is arranged in a pipe of the first pipe. A step of closing a passage, a step of arranging one end of a second pipe body in which a pipe line is closed by a closing body to a distance from one end of the first laid first pipe body, The second
Of the first tube is sucked through the suction tube to generate a flow of the stable liquid from the periphery toward one end of the first tube, and the second tube is mounted on the flow. A step of pulling one end to one end of the first tubular body and connecting the first tubular body;
The closing device arranged in the conduit of the first tube is moved into the conduit of the second tube connected to the
Closing the conduit of the second tube, removing the closed member attached to the second tube, and connecting one end of the third tube with the conduit closed by the first member to the first tube. A step of abutting the other end of the second pipe connected to the pipe to be spaced apart therefrom, and the third pipe of the closing device sucking the stable liquid through the suction pipe, A flow of the stabilizing liquid flowing from the second pipe toward the other end of the second pipe, and a second pipe having one end of the third pipe connected to the first pipe on the flow. Attracting and connecting to the other end of the
And a method of burying a pipe.

On the other hand, as a closing device used in the submerging method of the present invention, a moving closing body for closing the inside of a pipe, a suction pipe communicating from one side of the moving closing body to the other side,
A moving means for moving the movable closing body in the longitudinal direction of the pipeline; and a fixing means for fixing the moving closing body at a predetermined position in the pipeline. A mold closure device is also proposed.

<Operation> In the present invention, the third and subsequent tubes are connected so that the closing device is sequentially moved to be always positioned in the most distal tube, and the stable liquid is sucked from the position. Even in the case of performing, the tube guiding force due to suction does not substantially decrease, and a predetermined tube guiding force is always generated,
Smooth guidance and connection are possible. Further, after the connection of the tube is completed, the closing device is located in the terminal tube, and the stable liquid remains only in the terminal tube, so that the residual amount can be significantly reduced as compared with the prior art. For example, when laying while sequentially connecting the first to third pipes, the amount of the remaining stable liquid can be reduced to 1/3 or less as compared with the conventional case.

[0019]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. <Example of closing device> First, a description will be given of a closing device example 10 with reference to FIGS. 8 and 9. The closing device 10 according to the present invention includes a moving closing member 11 for closing the inside of the pipe P,
Suction tube 1 that penetrates this movable closing body 11 in the longitudinal direction of the pipeline.
2, a moving means 13 for moving the movable closing body 11 in the longitudinal direction of the pipe P, and a fixing means 14 for fixing the moving closing body 11 at a predetermined position in the pipe P.

The movable closing body 11 of this embodiment has a rotating paraboloidal main body 11A having a diameter slightly smaller than the inner diameter of the pipe, and a rotation axis of the main body 11A, and an outer peripheral surface of the main body 11A and an inner surface of the pipe P. And a packing device 11B for sealing the gap S1. The packing device 11B includes a seal ring 11a and actuators 11b, 11b..., And the seal ring 11a is
It is removably fitted into a gap S1 between the outer peripheral surface of A and the inner surface of the pipe P.

The suction tube 12 penetrates along the central axis of the main body 11A of the paraboloid of revolution in the movable closing body 11, and extends from the front of the main body 11A to the rear of the apparatus 10, and has a base end thereof. Is an extension pipe 16 through a T-shaped branch pipe 15.
It is connected to the. The proximal end of the discharge pipe 17 for the remaining stable liquid is connected to the remaining flow path of the T-shaped branch pipe 15.
The discharge pipe 17 penetrates the main body 11A, and is piped such that a tip end thereof is close to a pipe bottom in front of the main body 11A. A suction valve 12V and a discharge valve 17V are interposed between the suction pipe 12 and the discharge pipe 17, respectively.
By switching the flow path of the branch pipe 15 by opening / closing the 7V as appropriate, it is possible to switch between suction at the time of connection via the suction pipe 12 and suction at the time of discharge of the remaining stable liquid via the discharge pipe 17. It has become.

On the other hand, at the lower portion of the movable closing body 11, chassis members 13A, 13 penetrating the main body 11A in the front-rear direction.
3A are provided on the left and right sides with respect to the moving direction, and a plurality of wheels 13B, 13B... Are attached to the front and rear sides of the main body 11A in the chassis members 13A, 13A, respectively, and constitute the moving means 13 of the present invention. I have. Incidentally, as a matter of course, the chassis material 1 in the moving means 13 is used.
In the portion where the suction pipe 12 and the discharge pipe 17 penetrate the movable closing body 11 in addition to 3A, the gap between the outer surface of the penetrating material and the inner surface of the through hole is kept liquid-tight.

As the fixing means 14, the movable closing body 1 is used.
1 is attached to the upper left, lower left, upper right, and lower right portions on the back surface of the base 1 so as to be swingable in the pipe diameter direction, and has abutment members 14B at the ends thereof.
4A, 14A, and jacks 14C, 14 in a posture along the pipe radial direction for swinging these stays 14A, 14A,.
C, the stay 14A has an abutting body 14B at the tip thereof which can be freely moved toward and away from the inner surface of the tube by expansion and contraction of the jack 14C. When fixed, the abutment body 14B fits into the concave portion PX between the enlarged diameter portion P1 of one of the pipes P and the end portion P2 of the other pipe inserted into the enlarged diameter portion P1 in the pipe joint portion PJ. , So that it can be hooked.

<Connection Method> On the other hand, using the above-described in-pipe movable closing device 10, a pipe can be buried as follows, for example, according to the flow of FIG.

That is, basically, similarly to the conventional example, after the guide wall 1 is constructed, the excavation of the starting-end side human hole pit M is first performed by a power shovel or the like while filling a stable liquid such as bentonite.

Next, as shown in FIG.
A connecting pipe 30 for connecting the above-described integrated connecting pipe body PU is attached thereto, and is lifted by a truck crane or the like via an appropriate hanging member in a state where the connecting pipe 30 is integrated with the connecting pipe 30, and the base end of the trench D is formed. Sunk in. In this example, a coupler 6G is fixed to the upper end of the connection pipe 30 in advance, and a partition plate 51 and a guide fitting 36 described later are attached to the coupler 6G.
The guide rod 7G for guiding the screw is screwed. At this time,
As shown in the figure, it is preferable that a temporary lid 50 to which a recovery rope 41 is connected is attached and closed in the opening at the end of the connection pipe 30 (the new pipe connection end). This facilitates installation of a closing device described later.

When the first human hole 2 is positioned at a predetermined position, as shown in FIG. 12, the erection member 20 erected between the guide walls 1 along the groove width direction and the suspension support Are connected by a nut 21 and suspended and supported in the trench. After the suspension support, the partition plate 51 is erected in the excavation groove D along the side of the end of the connection pipe 30 (the temporary lid 50 attached to the connection pipe 30). Partition plate 5
As shown in FIG. 13, 1 has an overhang portion 51A on the surface to be solidified (the connection pipe 30 side), and the overhang portion 51A is provided with accommodation holes 51b, 51b penetrating the upper and lower surfaces. And
The guide rods 7G, 7G attached to the connection pipe 30 and the recovery rope 41 are respectively accommodated in the accommodation holes 51b, 51b which are used when the partition plate is built, and the upper surface of the partition plate 51 extending to the stable liquid level. From each other.

When the partition plate 51 is installed, as shown in FIG. 14, the solidifying material is added to the stabilizing liquid B in the groove D of the human hole 2 more than the partition plate 51, and air stirring or the like is performed. Stirring is performed to solidify the stable liquid in the portion to obtain a solid C.

After the solidification is completed, the above-mentioned in-pipe movable closing device 10 according to the present invention is installed in the connecting pipe 30 attached to the first human hole 2. Specifically, after arranging the intra-pipe movable closure device 10 in the connection pipe 30,
The receiving pedestal 52 is erected and fixed along the base end opening surface of the connecting pipe 30. Subsequently, the jacks 14C, 14C of the fixing means 14 of the in-pipe movable closing device 10 are extended, and the stay 14 is extended.
A, abutment bodies 14B, 14B at the tip of
It presses against the corner where 2 and the base end of the connection pipe 30 intersect, and fixes the closing device 10 (see FIG. 8). After the solidification is completed, the erection member 20 can be removed (in the illustrated example, it is left without being removed).

Next, as shown in FIG. 15, trench excavation is performed in a portion where the new pipe connected to the first human hole 2 is buried, while the stable liquid is filled. After the excavation, as shown in FIG. 16, the partition plate 51 is pulled up and removed leaving the guide rod 7G, and then the recovery rope 4 is removed.
1 is pulled from the ground side, and the temporary lid 50 is also removed.

Thereafter, on the ground portion, preparation of an integrated connection pipe PU formed by connecting a plurality of pipes P, P. Specifically, as shown in FIG.
The front end opening of U (that is, the end opening on the opposite side to the first human-hole-side connection end) is closed by the temporary lid 50. Further, a guide device 39 in which the limit switch 38 and the guide fitting 36 are integrated is attached to the upper part of the base end of the integrated connection pipe PU. In the illustrated example, a first mounting coupler 39a is fixed to a side portion of the guide device 39, and the first mounting coupler 39a is provided.
The second mounting coupler 39b is coaxial with the upper support 3
A withdrawal screw rod 34 fixed to the top and having a length such that the upper part protrudes above the stable liquid level passes through the first and second couplers 39a and 39b in order and is screwed thereto. Thereby, the guide device 39 is fixed to the upper part of the base end of the integrated connection pipe PU. Therefore,
Screw the removal screw bar 34 appropriately to make the second mounting coupler 3
9b, the connection between the guide device 39 and the integrated connecting pipe PU is released when the screw is engaged with only the first mounting coupler. Can be collected. On the other hand, the guide fitting 36 in the illustrated example has a cylindrical base 36A along the longitudinal direction of the integrated connecting pipe body and the cylindrical base 3A.
It comprises a shaft portion 36B which can be moved back and forth, which is inserted through 6A, and a guide pipe 36C which is fixed at the tip of the shaft portion 36B in a posture along the vertical direction. A confirmation light 35 is connected to the limit switch 38 via a signal cable 35a.

On the other hand, similarly to the connection pipe 30 of the above-described human hole 10, a coupler 6G is fixedly provided at the upper end of the integrated connection pipe PU, and the partition plate 51 and the guide fitting 36 are guided to the coupler 6G. Screw the guide rod 7G.

With such preparation, subsidence is started. FIG.
As shown in FIG. 7, the connecting pipe PU is suspended and supported by the chain crane scaffold 8 via the wires 5, 5... Wound around the connecting pipe PU by the chain block 9A, and supported by the chain 9B. Are successively dropped. At this time, when the guide rod 7G is dropped to a predetermined height position, a guide rod 7G that has been erected on the upper part of the connection pipe 30 is inserted into the guide pipe 36C of the guide fitting 36, and then further dropped. . Thereby, the integrated connection pipe body PU
Is settled while being guided by the guide rod 7G, and is surely abutted against the distal end of the connection pipe 30 of the first human hole 2 and is arranged in a state of being separated.

Thereafter, the suction pump (not shown) is operated to operate the suction pipe 12 and the extension pipe in the connecting pipe 30 at a position closer to the distal end than the closing device 10 (the integrated connecting pipe PU of the closing device 10 is shown). Through this order 16, the stable liquid B outside the closing device 10 is sucked, and a flow of the stable liquid B from the surroundings to the distal end opening of the suction pipe 12 through the inside of the distal end of the connection pipe 30 is generated. Then, along with this flow, the integrated connecting pipe body PU is drawn to the tip of the connecting pipe 30, and the connecting female portion 30a of the connecting pipe 30 and the connecting male portion Pa of the integrated connecting pipe body PU are fitted and connected. More specifically, first, the connecting male portion Pa of the integrated connecting pipe body PU enters and comes into contact with the connecting female portion 30a of the connecting pipe 30, and the front of the closing device 10 becomes a closed space filled with a stable liquid. Further suction generates a negative pressure in the closed space, and the integrated connection pipe PU
Is drawn more strongly, and a firm connection between the two tubes is achieved. FIG. 19 shows the connection completed state.

Since the connecting pipes PU are connected while being moved in the stabilizing liquid B in this manner, wheels or the like are mounted on a small portal crane or a portal scaffold suspending the connecting pipes PU. Is provided so that it can follow the movement of the integrated connection pipe PU.

When the connection of the integrated connecting pipe PU is completed in this way, the limit switch 38 attached to the integrated connecting pipe PU comes into contact with the solidified body C, and its signal is transmitted to the ground via the signal cable 35a. Since the connection completion lamp is lit and transmitted to the confirmation lamp 35, the connection completion state can be confirmed while on the ground.

When the connection is confirmed, as shown in FIG. 20, the removal screw rod 34 is pulled up as described above, so that the limit switch 38 is recovered on the ground. Since the guide rod 7G is also unnecessary, it is removed from the coupler 6G and collected. In the same manner as in the case of the first human hole 2, the erection member 20 erected between the guide walls 1 along the groove width direction and the suspension support Gevin bar 7 connected to the integrated pipe PU are connected by the nut 21. Then, the integrated connecting pipe body PU is suspended and supported in the trench D.

Further, in order to connect, for example, the second integrated connecting pipe PU2 to the tip of the connected integrated connecting pipe PU2, as shown in FIG. 21, the partition plate 51 is moved by the guide rod 7G. The first integrated connection pipe body PU in the excavation groove D is erected along the distal end surface thereof, and thereafter, the first human holes 2 are solidified into the stable liquid B in the side groove rather than the partition plate 51. The material is added and agitated by air agitation to solidify the stable liquid in the relevant portion.

When the solidification is completed, the process moves to the step of moving the closing device 10, which is a point of the present invention. That is, as shown in FIG. 21, the closing device 10 fixed in the connection pipe 30 is released from the fixing by the fixing means 14, and then the inside of the connection pipe 30 and the first integrated connection pipe P
U is sequentially advanced, and is positioned at the proximal joint portion PJ of the most distal tube of the first integrated connecting pipe PU, and the fixing means 14 is operated to operate the joint portion as shown in FIG. The closing device 10 is fixed to the PJ.

At the time of this movement, in the case of this example, the suction force can be used as in the case of the connection. That is, the tube in front of the closing device 10 is connected to the closing device 10, the tube wall of the connection tube 30, the tube wall of the first integrated connection tube PU, and the distal end opening of the first integrated connection tube PU. Temporary lid 50 attached
And is filled with a residual stabilizing liquid (not shown). Therefore, by suctioning the residual stable liquid in front of the closing device 10 backward through the suction pipe 12, a negative pressure is generated in the front closing space, and the negative pressure causes the closing device 10 supported by wheels. Can be moved naturally, so that the closing device 10 can be naturally drawn forward. Of course, the wheels of the closing device 10 can also be moved by other methods, such as being rotated by a traveling driving force source (not shown) and moved in a self-propelled manner, or manually pushed and moved by an operator.

When moving the closing device 10, the extension tube 1
6 are sequentially fed through the first human hole 2 and the first integrated connection pipe body PU. Therefore, as the extension pipe 16, a flexible one having a length in consideration of the entire length of the laying pipeline is prepared, or a plurality of extension pipes of a minimum length required per span are prepared. And add a new extension tube to the base end for each span.

Hereinafter, the first integrated connecting pipe body PU described above is used.
This is basically the same as the case of. That is, FIG.
As shown in the figure, the portion where a new pipe (second integrated connecting pipe) connected to the first integrated connecting pipe PU connected to the first human hole 2 is sunk, After the trench is excavated while filling, the partition plate 51 is removed, the recovery rope 41 is pulled from the ground side, and the temporary lid 50 attached to the distal end opening of the first integrated connection pipe PU is also removed. .

Next, a second integrated connecting pipe body PU2 is prepared. The details are the same as those of the above-mentioned first integrated connection pipe body PU. After the preparation is completed, as shown in FIG. 23, the burial is started, and the base end of the second integrated connecting pipe PU2 is erected on the distal end of the first integrated connecting pipe PU via the guide fitting 36. While being guided along the rod 7G, the first integrated connecting pipe body PU is abutted and spaced apart from the front end of the first integrated connecting pipe body PU.

Thereafter, a suction pump (not shown) is operated to close the closing device 1 in the first integrated connecting pipe PU.
The stable liquid B outside the closing device 10 is sucked through the suction pipe 12 and the extension pipe 16 in this order through the portion on the tip side from 0, and passes through the inside of the tip of the first integrated connection pipe PU from the surroundings. A flow of the stable liquid toward the opening at the distal end of the suction pipe 12 is generated, and the second integrated connection pipe PU is drawn to the base end of the first integrated connection pipe PU along with the flow, and the first liquid is drawn. The connecting female part PUa of the integrated connecting pipe PU and the connecting male part PU2a of the second integrated connecting pipe PU2 are fitted and connected.

Characteristically, in the present invention, at least at the time of the suction connection, the closing device 10 is always positioned at the most distal end tube (in this case, the distal end tube P of the first integrated connecting tube PU).
Is located in the rear end), and suction is performed therefrom, so that the third and subsequent tubes are connected unlike the conventional case where the closing device is always located in the most proximal end of the tube. Even in this case, the tube guiding force due to suction does not decrease, a predetermined tube guiding force is always generated, and smooth guidance / connection is possible.

Thereafter, the third, fourth,... Integrated connecting pipes can be connected in the same manner as the second integrated connecting pipe. In the same manner, the second human hole can be sunk and connected. In this case, for example, the second human body having the connecting pipe 30 attached to the proximal end and the distal end (at least to the proximal end) is used. A temporary lid is attached to the hole 2 and connected by suction.

On the other hand, when the pipe laying is completed, for example, FIG.
As shown in FIG. 4, the stabilizing liquid RB remains in the front part of the closing device 10 in the most distal tube P, so that the suction valve 12V is closed and the discharge valve 17V is opened, and the discharge pipe 17 and the discharge pipe 17 are opened by a suction pump (not shown). The remaining stable liquid RB in front of the closing device 10 is suctioned and discharged through the extension pipe 16. The amount of the residual stabilizing solution RB is very small as compared with the conventional example, so that the operation is completed in a short time and the disposal thereof is easy.

<Others> (A) In the above example, three or more pipes are sequentially connected by using a partition plate, with one pipe being settled, connected, and solidified as one span. However, similarly to the above-described prior art, three or more pipes may be sequentially sunk and connected, and when a predetermined number of sunk connections are completed, the entire portion may be solidified.

(B) In the above example, an example of construction using an integrated connecting pipe body PU composed of a plurality of single pipes P, P.
When the single tube P is large and heavy, the single tube P can be sunk one by one as one tube.

(C) The pipe P in the present invention includes not only a pipe as a whole but also a pipe P in which the connecting pipe 30 and the human hole 2 are integrated as in the above example.

[0051]

As described above, according to the present invention, even when the third and subsequent pipes are connected, the pipe guiding force is not reduced, and the residual stability in the laid pipe is reduced. The liquid volume is also significantly reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a conventional guide wall construction and an excavation form of an excavation trench.

FIG. 2 is a vertical cross-sectional view showing a conventional tube hanging process.

FIG. 3 is a vertical cross-sectional view showing a conventional tube hanging process from another direction.

FIG. 4 is a longitudinal sectional view showing a suspended support state in a solidifying material addition / mixing step.

FIG. 5 is a longitudinal sectional view showing a conventional process of connecting a human hole and a tube.

FIG. 6 is a schematic longitudinal sectional view showing a connecting step between a first tube and a second tube in the prior art.

FIG. 7 is a schematic longitudinal sectional view showing a connecting step between a second pipe and a third pipe in the prior art.

FIG. 8 is a partial longitudinal sectional view of the closing device according to the present invention.

FIG. 9 is a rear view of the closure device according to the present invention.

FIG. 10 is a flowchart of an example of a submerging method according to the present invention.

FIG. 11 is a schematic vertical sectional view showing a human hole laying step in the example of the burial method according to the present invention.

FIG. 12 is a schematic longitudinal sectional view showing a step of installing a partition plate in a human hole sunk portion in the example of the sunk method according to the present invention.

FIG. 13 is a sectional view taken along the line XIII-XIII of FIG.

FIG. 14 is a schematic longitudinal sectional view showing a human hole solidification step in an example of a submerging method according to the present invention.

FIG. 15 is a schematic longitudinal sectional view showing a step of excavating a first integrated connecting pipe buried portion in the example of the burying method according to the present invention.

FIG. 16 is a schematic longitudinal sectional view showing a step of removing a partition plate of a human hole buried portion and a step of removing a temporary lid attached to a connecting pipe of a human hole in the example of a submerging method according to the present invention.

FIG. 17 is a partial longitudinal sectional view schematically showing an example of an integrated connecting pipe body in an example of a submerging method according to the present invention.

FIG. 18 is a schematic longitudinal sectional view showing a submerging step and a suction connecting step of a first integrated connecting pipe body in an example of a submerging method according to the present invention.

FIG. 19 is a schematic vertical sectional view showing a state after completion of suction connection of the first integrated connecting pipe body in the example of the submerging method according to the present invention.

FIG. 20 is a schematic longitudinal sectional view showing a removal and recovery step of the guide device in the example of the burial method according to the present invention.

FIG. 21 is a schematic longitudinal sectional view showing a partition plate setting step and a solidifying step, and a closing device moving step of the first integrated connecting pipe buried portion in the example of the burying method according to the present invention.

FIG. 22 is a schematic vertical cross-sectional view showing a step of removing a partition plate of a first integrated connecting pipe buried portion and a step of removing a temporary lid attached to the first integrated connecting pipe in an example of a burying method according to the present invention. FIG.

FIG. 23 is a schematic longitudinal sectional view showing a submerging step and a suction connecting step of a second integrated connecting pipe in an example of a submerging method according to the present invention.

FIG. 24 is a schematic longitudinal sectional view showing a step of discharging a residual stabilizing solution in an example of a submerging method according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide wall, 2 ... Human hole, 3 ... Upper support material, 4 ...
Lower support material, 8: portal crane scaffold, 10: closing device,
DESCRIPTION OF SYMBOLS 11 ... Main body part, 12 ... Suction pipe, 17 ... Discharge pipe, 30 ... Connection pipe, 41 ... Recovery rope, 50 ... Temporary lid, 51 ... Partition plate, P ... Pipe body, PU, PU2 ... Integrated connection pipe body .

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[Procedure amendment]

[Submission date] December 21, 2000 (200.12.
21)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

Next, whether or not the connecting pipe PU is suspended and supported at the design position (depth direction position and groove width direction position) is determined by the Gevin rod 7 projecting from the stable liquid level and the predetermined portion of the pipe body. Is confirmed by the position of the uki F (not shown) connected with the connecting yarn. When the sunk position of the pipe is shifted, an H-section steel is erected on the side of the sunk pipe, and the H-section steel is pressed against the side of the pipe and moved in the groove width direction to adjust the sunk position. .

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008] However, in such a method of submerging a pipe, there is a problem that the pipe connection is difficult and complicated, and to solve this problem, Japanese Patent Publication No. Sho 63-5767 discloses a method for solving this problem.
Patent Document 3 discloses a technique for interconnecting pipes using a stable liquid flow by suction of a stable liquid (hereinafter referred to as prior art).
Has been proposed. An outline of this prior art will be described. First, as shown in FIG. 6, a stable liquid of a stabilizing liquid is supplied to a pipe 131 of a first pipe 130 (a connecting pipe portion provided in a human hole 102 in the illustrated example) laid in advance. The closing device 110 to which the suction pipe 112 is attached is fixed to close the pipe 131, and the second pipe 230 whose front end is closed by the temporary lid 250 (closing body) is replaced with the first pipe 230. 130 and is spaced apart from one end. Thereafter, the closing device 11
The second tube 230 sucks the stabilizing liquid B through the suction pipe 112 to generate a flow of the stabilizing liquid B from the periphery toward one end of the first tube 130, and puts it on the flow. Second
The base end of the tubular body 230 is guided to one end of the first tubular body 130, and the two tubular bodies 230, 130 are connected and integrated.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010] Thereafter, as shown in FIG. 7, the base end of the third pipe 330 whose front end is closed by the provisional lid 350 is opposed to the front end of the second pipe 230 and is spaced apart. Then, the closing device 11 for closing the inside of the first tubular body 130
The third tube 330 of 0 (not shown in the figure) sucks the waist-stabilizing liquid B through the second tube 230, the first tube 130 and the suction tube 112 in this order, Second from surrounding
A flow of the stabilizing liquid B is generated toward the distal end of the tubular body 230, and the base end of the third tubular body 330 is guided to the distal end of the second tubular body 230 along the flow to connect the two tubular bodies. And unite.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

On the other hand, similarly to the connection pipe 30 of the human hole 2 described above, a coupler 6G is fixedly mounted on the upper end of the integrated connecting pipe body PU, and the partition plate 51 and the guide fitting 36 are guided to the coupler 6G. Screw the guide rod 7G.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Change

[Correction contents]

On the other hand, when the pipe laying is completed, for example, FIG.
As shown in FIG. 4, the stabilizing liquid BR remains in the forward end of the closing device 10 in the most distal tube P, so that the suction valve 12V is closed and the discharge valve 17V is opened. The remaining stable liquid BR in front of the closing device 10 is suctioned and discharged through the extension pipe 16. The amount of the residual stabilizing solution BR is very small as compared with the conventional example, so that the operation is completed in a short time and the disposal is easy.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] Explanation of sign

[Correction method] Change

[Correction contents]

[Explanation of Signs] 1 ... guide wall, 2 ... human hole, 3 ... upper support, 4 ...
Lower support material, 8: portal crane scaffold, 10: closing device,
11: moving closed body, 12: suction pipe, 17: discharge pipe, 30
... Connection pipe, 41 ... Recovery rope, 50 ... Temporary lid, 51 ... Partition plate, P ... Pipe, PU, PU2 ... Integral connection pipe.

[Procedure amendment 7]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 23

Continued on the front page (72) Inventor Tetsuo Kawato 4-2-235 Kudankita, Chiyoda-ku, Tokyo Within Light Industry Co., Ltd. (72) Inventor Yoshio Wada 4-25-13, Matsue, Matsue, Edogawa-ku, Tokyo 3 F-term in Wa Sangyo Co., Ltd. (reference) 2D063 BA32

Claims (2)

[Claims] 1. A method of burying a pipe, wherein at least three pipes are sequentially buried and laid in a stabilizing liquid in a digging trench, and the pipes are sequentially connected to each other in a stabilizing liquid. Laying the body in the excavation trench and arranging a closing device equipped with a suction pipe for the stabilizing liquid in the channel of the first pipe to close the channel, and closing the channel with the closing body A step of arranging one end of the closed second pipe body at one end of the previously laid first pipe body so as to be spaced apart therefrom; and Suction is performed through a suction pipe to generate a flow of a stable liquid from the periphery to one end of the first pipe, and the one end of the second pipe is placed on one end of the first pipe with the flow. Connecting the first pipe to the first pipe, and connecting the first pipe to the second pipe connected to the first pipe. Moving the closing device disposed therein to close the channel of the second tube, and removing the closing member attached to the second tube; and closing the channel with the closing member. A step of arranging one end of the closed third pipe body at a distance from the other end of the second pipe body connected to the first pipe body, and disposing the third pipe body of the closing device; The stabilizing liquid is sucked through the suction pipe to generate a flow of the stabilizing liquid from the surroundings to the other end of the second pipe, and one end of the third pipe is put on the flow. A step of drawing and connecting to the other end of the second tube connected to the first tube, and burying the tube. 2. A moving closing body for closing the inside of a pipeline, a suction pipe communicating from one side of the moving closing body to the other side, and moving means for allowing the moving closing body to be movable in a longitudinal direction of the pipeline. Fixing means for fixing the movable closing body at a predetermined position in the pipeline.