JP3283492B2 - Pipe laying method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for suspending and lowering a pipe in a groove filled with a stabilizing liquid.

[0002]

2. Description of the Related Art In recent years, when a pipe such as a sewer pipe or a culvert (box culvert) is sunk into a slot and buried, the pipe is sunk down one by one in the slot and the connection is a so-called open-cutting method. Alternatively, a method of submerging multiple pipe groups in a trench filled with stabilizing liquid and connecting them to each other or to manholes can minimize traffic interruptions, especially in urban areas. It has been widely used.

[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.
A screw thread 7 is screwed with a Gevin rod 7 for position monitoring and hanging support.

[0005] After the completion of the setup, for example, using the portal crane scaffold 8 assembled as a structure as a support, the connecting pipe PU via the wire 5 wound around the connecting pipe PU by the chain block 9A. 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. 2 shows this subsidence completion state. Thereafter, although not shown, the erection member erected between the guide walls 1 and 1 and the Gevin bar 7 are connected, and the connection pipe PU is suspended and supported.

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. .

After that, a hardening 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. After the completion of the solidification and a curing period of about one week, a worker infiltrates the human hole 2 and digs the solidified muddy water portion as shown in FIG. The short pipe P 'for connection is inserted from the inside of the human hole 2 into this through-passage, and the space around the short pipe P' is filled with mortar to stop water.

[0008]

However, the position adjustment of the suspended support (submerged pipe) in the conventional method has a problem that it takes time and effort.

Therefore, a main object of the present invention is to make it possible to easily position a tube at a predetermined position in a groove.

[0010]

According to the present invention, there is provided a method of suspending and lowering a pipe in a groove filled with a stabilizing liquid, the method comprising: At two or more locations spaced apart in the longitudinal direction of the body, spacers are integrated on both sides in the groove width direction of the tubular body such that the amount of protrusion from the side surface of the tubular body is equal to each other. The width of the portion where the spacers are integrated in the integrated pipe is made substantially equal to the groove width at the position where the pipe is to be laid, and then the integrated pipe is fitted in the groove and the stable liquid is inserted. A method of laying down a tube, wherein the tube is sunk inside and the spacer has elasticity at least in a groove width direction by bending, and the width in the groove width direction is slightly contractible.

According to a second aspect of the present invention, an upper supporting member is fixed to an upper portion of the tubular body, and a lower supporting member is fixed to a lower portion, and the spacer is provided between the upper supporting member and the lower supporting member. 2. The method according to claim 1, wherein the arcuate member is provided around the outer side of the tubular body and is spaced apart from the outer surface of the tubular body.

[0012]

[0013]

<Operation> In the present invention, since the pipe is fitted into the groove by the spacer on the side,
It is automatically positioned at a predetermined position in the groove without the need for position adjustment after hanging down and setting. Therefore, the positioning of the tube is simplified.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail based on an example of application to a burial method by stable liquid excavation. FIGS. 5 and 6 show a state where the integrated connecting pipe body PU with the spacers 10 and 10 of the present invention fitted therein is sunk in the excavation groove D filled with the stabilizing liquid B. The steps up to this state and the subsequent steps will be described in order.

First, the construction of the guide wall 1 and the excavation of the stable liquid in the excavation groove D are performed in the same manner as in the conventional example.
The human hole 2 is installed at the beginning of the excavation groove D. The groove width in the illustrated example is constant in the groove longitudinal direction and the groove depth direction.

On the other hand, on the ground, for example, an integrated connecting pipe body PU is assembled in the same manner as in the above-mentioned conventional example. Then, for example, at this time, the spacers 10L and 10R of the present invention are integrated with the side in the groove width direction of the integrated connecting pipe PU, and the width of the integrated connecting pipe PU at the portion where the spacers 10L and 10R are integrated. Is substantially equal to the groove width W1 at the position where the pipe is to be laid. In this example, spacers 10L and 10R are integrated with both sides of the tube PU in the groove width direction in the groove width direction so as to position the tube PU at the center in the groove width direction. At the same time, the width of the part where the spacers 10L and 10R are integrated in this integrated pipe PU is made substantially equal to the groove width W1 at the position where the pipe is to be laid, and from the side of the pipe of the spacer 10L on one side. Overhang amount W2 is equal to the overhang amount W3 from the other tubular body side surface.

When the both ends in the longitudinal direction of the integrated connecting pipe PU are free ends as in this example, the above-mentioned pair of spacers 10L and 10R are connected in the longitudinal direction of the pipe as shown in FIG. Two or more places are provided at intervals, or not shown, but along the longitudinal direction of the pipe, such that the pipe PU does not slide or rotate in the planar direction due to the support by the side walls of the groove D, for example, It is preferable to provide the tube body from the distal end to the proximal end so as to be continuous.

Further, the spacers 10L, 10R of this embodiment
According to the invention described in claim 4, a projecting member spaced from the outer surface of the tube body PU and provided between the upper support member 3 and the lower support member 4 so as to extend around the side of the tube body PU (illustrated example) In this example, a plate material such as flat steel is bent into an arcuate cross section.
It is also possible to use a bar material such as a steel bar which is bent in an arc shape), and has elasticity in the groove width direction due to the bending thereof, and can be contracted in the groove width direction.
The spacers 10L and 10R are firmly fixed to the support members 3 and 4 by welding, bolting, or the like.

When the setup is completed, the connecting pipe PU is suspended by the suspension apparatus 30 using the suspension above the groove as a fulcrum, for example, in the same manner as in the conventional example, and the stable liquid is placed in the excavation groove for submerging the pipe. B is inserted into a predetermined position in B and is sunk.

As described above, the spacers 10L and 10R are integrally formed on both the one side in the groove width direction and the opposite side in the groove width direction of the tube PU. Spacers 10L, 10
The width of the part where R is integrated is set to the groove width W1
And each spacer 10L, 10R
Since the overhang amounts W2 and W3 from the side of the pipe body are made equal, the pipe body PU is automatically positioned at the center in the groove width direction after being fitted and sunk to a predetermined depth. Become. Also, as described above, the spacer 10
L and 10R have elasticity in the groove width direction and can be slightly contracted in the same direction. Therefore, for example, even if the groove width is locally reduced, the spacer can slightly shrink in the groove width direction due to collision with the groove side wall in the narrow groove width portion. The PU can be smoothly fitted into a predetermined position in the groove.

After the positioning, for example, the position of the sediment is confirmed using the Gevin bars 7, 7,..., And the absolute position is confirmed using a measuring instrument such as a transit. As a result, if the integrated connecting pipe body PU is positioned at a predetermined position, for example, as shown in FIG. 7, the Gevin rod 7 is passed through the erection member 20 erected between the guide walls 1 and 1, The installation member 20 and the Gevin bar 7 are connected by screwing a nut 21 into the penetrating portion, and the connection pipe PU is suspended and supported by the guide wall 1 via the construction member 20, and then suspended by the suspension device 30. Release support.

Thereafter, for example, the stabilizing solution B is solidified in the same manner as in the above-mentioned conventional example, and after the solidification is completed and a predetermined curing period is established, the human hole 2 and the connection pipe PU are communicated. The spacers 10, 10 are buried in the solidified body.

<Others> (A) The spacers 10L and 10R according to the present invention have an overhang width W2 with respect to the side surface of the tube prior to the sinking of the tube PU.
W3 may be configured to be finely adjusted individually or in conjunction with each other.

(B) As the spacers 10L and 10R, in addition to the spacers made of steel as in the above example, those made of rubber or resin can be used. The spacers 10L and 10R made of an elastic material such as rubber or resin have elasticity themselves and can contract in the groove width direction.
On the other hand, in the case of a highly rigid material such as a steel spacer, an appropriate shape exhibiting an elastic effect is formed, for example, by bending into a bow shape (leaf spring shape) so as to be able to contract in the groove width direction as in the above example. Thereby, contraction in the groove width direction becomes possible.

(C) In the present invention, the side surface of the groove D may be inclined or may extend along the vertical direction. Preferably, the groove width W1 is substantially the same in the longitudinal direction of the groove. Further, both side walls of the groove D are preferably formed in parallel.

[0027]

As described above, according to the present invention, the tube can be easily positioned at a predetermined position in the groove.

[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 conventional process of connecting a human hole and a tube.

FIG. 5 is a vertical cross-sectional view showing a state after hanging down and laying down a pipe body with a spacer according to the present invention.

FIG. 6 is a longitudinal cross-sectional view showing a state after hanging down and laying down a pipe body to which a spacer is attached according to the present invention, viewed from the side.

FIG. 7 is a longitudinal sectional view showing a state after positioning of the tube.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide wall, 2 ... Human hole, 3 ... Upper support material, 4 ...
Lower support material, 10: spacer, PU: integrated connecting pipe, B: stable liquid, D: excavation groove, W1: groove width, W2, W3
... the amount of overhang.

Claims (2)

(57) [Claims] 1. A method for suspending and lowering a pipe in a groove filled with a stabilizing liquid, wherein a groove width in the pipe at two or more positions spaced apart in a longitudinal direction of the pipe. At both sides in the direction, the spacers are integrated so that the amount of protrusion from the side of the tube is equal to each other, and the width of the part where the spacers are integrated in this integrated tube is scheduled to be set in the tube. Not substantially equal to the groove width at the position, and thereafter, the integrated pipe body is fitted into the groove and settled in the stabilizing liquid, and the spacer has at least elasticity in the groove width direction by bending, A method for laying down a tube, characterized in that the width in the groove width direction can be slightly contracted. 2. An upper support member is fixed to an upper portion of the tube body, and a lower support member is fixed to a lower portion thereof. The spacer is provided between the upper support member and the lower support member so as to extend outwardly of the side of the tube. 2. The method for laying down a pipe according to claim 1, wherein the pipe is a bow-shaped member which is erected around the outer surface of the pipe.