JP3292824B2 - Burial method of pipe - 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 burying a pipe in a case where a sewer pipe or the like is laid while stabilizing the ground using muddy water.

[0002]

2. Description of the Related Art Conventionally, when laying a sewer pipe, etc., there are roughly two types of drilling method, pipe propulsion method, shield method, etc. These are used when the road width to be constructed is narrow or the ground is soft. It is necessary to adopt auxiliary construction methods such as water stoppage and earth retaining to prevent the impact on neighboring houses, and these auxiliary construction methods are heavy and not economical.

Therefore, in recent years, a laying method of a submerging method based on a mud solidification method typified by a so-called “plus method” has rapidly spread. That is, a submerged route is excavated from the ground with a power shovel or the like while supplying a stabilizing liquid such as baitnight muddy water, and then the pipe is suspended by a crane or the like and laid down, and then cement milk is added to the stabilizing liquid. Then, the stabilizing solution is solidified and the tube is buried.

In this case, when the unit pipe or a plurality of pipes connected in advance on the ground are sunk in the excavation trench to solidify the mud, the opening at the tip end of the pipe is closed and the mud is closed. 2. Description of the Related Art A locking box is installed at a distal end portion of a pipe in order to prevent intrusion into the pipe or to prevent muddy water from flowing out to another location in the line direction.

[0005] For this purpose, Japanese Patent Publication No. 61-20754,
JP-A-54-104603, JP-B-58-40072
There are known technologies such as Japanese Patent Publication No.

[0006]

This type of rocking box defines a mud solidification target area, and has a function of solidifying the mud only in that area. Since it has the function of preventing muddy water, it cannot be removed until the mud solidifies.

However, when solidifying muddy water, usually 4
It takes about 5 days, and during this time, waiting is inefficient.

[0008] Therefore, a main object of the present invention is to improve construction efficiency.

[0009]

According to the first aspect of the present invention, which solves the above-mentioned problems, a pipe body is laid in a digging trench, and the digging trench is filled with muddy water and solidified. In the solidification process or after solidification, in a pipe burying method for connecting a preceding pipe and a subsequent pipe, (1) a first locking box and a second locking box separate from the first locking box;
A locking box is prepared, (2) the preceding pipe body is sunk in the excavation groove, and (3) the first locking box is sunk to partition the first solidification target area on the preceding pipe side. (4) Simultaneously with or before or after the first locking box is laid down, the second locking box is moved along the first locking box. (5) Thereafter, solidification of the first solidification target area is started. (6) In the solidification process of the first solidification target area, the second locking is performed. (7) After the excavation of the subsequent excavation groove is completed, a subsequent pipe body is laid in the subsequent excavation groove, and the solidification of the first solidification target area is in progress or completed. The said The locking box is removed to connect the subsequent pipe to the preceding pipe. (8) The first locking box is also removed at any stage until the connection is completed. This is a method for burying pipes, which aims to solidify the pipe.

According to a second aspect of the present invention, a pipe body is laid in a digging groove, and the digging groove is filled with muddy water and solidified. In the method of burying a pipe for connecting to the pipe, (1) a first locking box and a second locking box separate from this.
A locking box is prepared, (2) the preceding pipe body is sunk in the excavation groove, and (3) the first locking box is sunk to partition the first solidification target area on the preceding pipe side. (4) Simultaneously with or before or after the first locking box is laid down, the second locking box is moved to a position along the first locking box on the opposite side of the first solidification target area from the preceding tube. (5) Thereafter, solidification of the first solidification target area is started. (6) In the solidification process of the first solidification target area, subsequent excavation is performed on the second locking box side. (7) After the excavation of the subsequent excavation groove is completed, a subsequent pipe body is laid in the subsequent excavation groove, and while the solidification of the first solidification target area is in progress or has been completed, the second locking is performed. Bob (8) The first locking box is also removed at any stage until the connection is completed. (9) Then, in the subsequent excavation trench This is a method of burying a pipe, which is intended to be solidified.

According to a third aspect of the present invention, there is provided the pipe burying method according to the first or second aspect, wherein the first locking box is removed in a state where the first solidification target area is semi-solidified.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments shown in the drawings.

(About the whole example) Prior to embedding the pipe, first, as shown in FIGS. 1 and 12, guide walls 1 and 1 are constructed, and a ground shovel or the like is used to stabilize the ground with a power shovel or the like. The excavation trench 2 is excavated while supplying the bentonite muddy water S. A human hole 3 is buried in the end of the excavation groove 2 before or after.

On the other hand, on the ground, as shown in FIG.
Preparation for laying down a preceding pipe (referred to as a preceding pipe) 10 is performed. That is, a lower H-section steel 1 for increasing gravity against reinforcement and buoyancy is provided below the preceding pipe 10.
1, an upper channel steel 12 is arranged on the upper part, and the preceding pipe 10 and the wire 13 are integrated. A coupler 14 is fixed to the upper surface of the upper channel steel 12 at intervals in the longitudinal direction.

A temporary lid 15 is provided at an opening end of the leading pipe 10 on the side of the human hole 3, and a water injection air vent 16 is provided. A water stop lid 17 is provided at the other end (the following tube side) opening.
A collection wire 18 is connected to the water stop lid 17.

Further, as shown in FIG. 3, at the tip of the preceding tube 10 on the subsequent tube side, as shown in FIG.
The holding cylinders 19, 19 are integrated on both sides or on both sides of the auxiliary steel material integrated therewith.

Further, as shown in FIG. 2, a Gevin rod 20, 20,... Is screwed into each of the couplers 14, 14, and the holding cylinders 19, 19 are formed of, for example, threaded steel rods along the vertical axis direction. The guide members 21 and 21 are screwed in.

After the completion of the setup, for example, FIG.
Using a portal scaffold crane 22 shown in FIG. 2, the entirety of the preceding tubular body 10 is suspended in the muddy water S while being suspended by the wire 24 wound around the chain block 23. In this case, it goes without saying that it is hung at a plurality of locations in the longitudinal direction.

It is confirmed that the sink has been sunk at a predetermined position, that is, that the level and the street have reached a predetermined position.
Confirm by the position of 0 ... In this case, as shown in FIG. 2, the sinking depth can be confirmed using the float 25. Thereafter, the cement milk is poured into the muddy water S and agitated with air to solidify the muddy water S.

In the solidifying process of the muddy water S or after the solidification, the succeeding pipe is connected to the preceding pipe 10 on the right side in FIG.

In the present invention, a locking box is used to cover the open end of the preceding pipe body 10 directly or via the lid such as the water-stop lid 17 to divide a region where the muddy water S is to be solidified.

(First Embodiment: Corresponding to Claim 1) FIGS. 4 to 11 show examples of a locking box. In this example, a first locking box 51 and a separate second locking box 52 are used. The first locking box 51 of the illustrated example is obtained by assembling a steel plate and a shaped steel, and has an arch at a portion where the front end plate 51a, the rear end plate 51b, the side members 51c, 51c, the top plate 51d, and the front end plate 51a are cut out. It has a fitting notch plate 51e that forms a lower surface of a shape. Further, guide holes 51f, 51f and a recovery wire insertion hole 51g are formed from the inner surface of the fitting notch plate 51e to the top plate 51d.

As shown in FIG . 9, the second locking box 52 is formed by integrating fitting members 52b, 52b made of square steel on both sides of a main body plate 52a.

In this example, as described above, the leading pipe 10 is sunk in the excavation groove 2 and, before or after the leading pipe 10 is sunk, the holding cylinder at the tip of the leading pipe 10 is set. By screwing the guide members 21 and 21 to the guide members 19 and 19, the guide members 21 and 21 are integrated with the preceding tubular body 10 along the vertical axis direction, and the guide members 21 and 21 are extended to the ground side. And guide members 2 in guide holes 51f, 51f of the first locking box 51.
The first locking box 51 is laid down to partition the first solidification target area on the preceding pipe 10 side (see FIG. 13). The open end of the preceding tube 10 is
The first locking box 51 is covered by a rear end plate 51b.

The guide members 21 and 21 are shown in FIG.
On the ground side, for example , as shown in
It is supported by holding members 26 and 27 made of steel material straddled between the two. In this case, the leading pipe body 10 may be supported without the guide members 21 and 21 or by supporting the Gevin rods 20 on the ground side as shown in FIG.

On the other hand, as shown in FIG. 13, simultaneously with or before or after the first locking box 51 is laid, the second locking box 52 is moved along the first locking box 51 to the first solidification target. Sink at the position opposite to the area. At the time of this subsidence, positioning can be achieved by engaging the enlarged portions of FIG. 4 with the ribs of the side members 51c, 51c and the engaging portions of the fitting members 52b, 52b, as shown in FIG. .

Thereafter, solidification of the first solidification target area is started. In the solidification process of the first solidification target region, a submerged pipe connected to the preceding pipe 10 is sunk, as shown in FIG.
As shown in FIG. 4, the excavator 60 excavates the subsequent excavation groove 2A on the second locking box 52 side while filling the muddy water S. At the time of excavation of the subsequent excavation groove 2 </ b> A, since the opening end of the preceding pipe 10 is partitioned and covered by the second locking box 52, the leading pipe 10 may be damaged by the cutting edge of the excavator 60. Is prevented.

After the excavation of the subsequent excavation groove 2A is completed, a subsequent pipe body is laid in the subsequent excavation groove 2A, and while the solidification of the first solidification target region is in progress or has been completed, the second locking box 52 is set. Is removed, the first locking box 51 is also removed, the subsequent pipe body and the preceding pipe body 10 are connected, and thereafter, the inside of the subsequent excavation groove 2A is solidified.

Here, the first locking box 51
Before the solidification of the first solidification target area is completed (about 4 to 5 days are required as described above), it is desirable to remove the muddy water in a semi-solidified state, for example, after 1 to 2 days.

Even if the first locking box 51 is removed, there is no problem because the second locking box 52 prevents the ground around the first solidified region from collapsing.
The removed first locking box 51 can be transferred to a setup operation for a subsequent section of the tubular body.

Here, it is desirable that the open end of the preceding tubular body 10 be stopped using the water stop lid 17 as described above.
Therefore, the open end of the leading pipe body 10 is covered with the water blocking lid 17, and further, the rear end plate 5 of the first locking box 51.
1b.

In this case, the collection wire 1 is attached to the water stop lid 17.
8 is attached in advance to the collection wire insertion hole 51g, and at the time of removal of the first locking box 51, the collection wire 18 is also pulled up to collect the water blocking lid 17. it can.

(Second Embodiment: Corresponding to the second aspect of the present invention) Here, the open end of the preceding tubular body 10 is not covered with the rear end plate 51 b of the first locking box 51, It can be covered by the second locking box 52. As shown in FIGS. 15 and 16, for example, a rear end plate 51 b in which the rear end plate 51 b is notched in an arch shape can be used as the first locking box 51 in this example.

In this case, the opening end of the preceding tubular body 10 may be directly covered with the second locking box 52 without using the water stop lid 17 to prevent intrusion of muddy water (infiltration of muddy water). Although the prevention effect is not perfect, a certain degree of intrusion prevention effect is shown), but it is desirable that the opening end thereof be closed by the water stop lid 17. In this example, the second locking box 52 double covers the open end of the preceding tubular body 10 via the water blocking lid 17.

In the second embodiment, the leading pipe 10
In order to prevent infiltration of muddy water from the open end when laying, the second locking box 52 covers the open end of the preceding pipe 10 before or simultaneously with the laying of the preceding pipe 10. However, when the water blocking cover 17 is used, since the possibility of intrusion of muddy water from the opening end is small, the second locking box is 52 may be provided.

(Modification) As shown in the illustrated example, the fitting notch formed in the first locking box 51 includes the upper channel steel 12 and the holding cylinder 1.
A step may be formed at the back of the arch to accommodate the 9,19. Further, as the first locking box, a through-hole that surrounds the entire periphery of the open end of the preceding tubular body 10 (including the attached member, if any) may be formed. However, in this case, it is necessary to fit the first locking box and the preceding pipe body 10 in advance on the ground, and simultaneously settle and remove them.

The locking box is made of concrete,
It can be in various forms, such as steel or an assembly of various materials. The locking box can be suspended from the ground by a suitable means via a hook or the like.

The collection wire 18 may be extended to the ground along the outer surface of the first locking box 51, or may be inserted through the guide hole 51f.

On the other hand, in the above-described example, the first locking box 51 is laid down after the leading pipe 10 is laid, but before the leading pipe 10 is laid, the guide hole of the first locking box 51 is laid on the ground. 51f, 51f and the guide members 21, 21 may be set in a relatively penetrating state, and both may be simultaneously sunk in the excavation groove 2. In addition, the guide members 21 and 21 are screwed onto the holding cylinders 19 and 19 on the ground in advance, so that the guide members 21 and 21 are not integrated with the preceding tubular body 10.
The guide members 21 and 21 may be screwed into the holding cylinders 19 and 19 to be integrated with the preceding tube 10 after the preceding tube 10 is laid down.

In any case, if the first locking box 51 is sunk along the guide members 21, 21, the first locking box 51 can be sunk at a predetermined position and posture with respect to the preceding pipe 10. .

On the other hand, the first locking box 51 can be sunk at a target position without forming a guide hole and without using a guide member, while being suspended via the hanging metal fittings. In this case, for example, Gevin rods 20, 20
Can be sunk using the above-mentioned portal scaffolding crane 22 using the position of ... as an index. The construction method is the same as in the above-described example.

[0042]

As described above, according to the present invention, two rocking boxes are used for partitioning the solidification target area, protecting the end of the pipe, solidifying the muddy water, and excavating the subsequent excavation trench. because, without waiting for complete solidification of mud, you can remove the first locking box, which can be turned to setup for a third <br/> of the tube coupling, increases the construction efficiency.

Further, since the division of the mud solidification target area and the closing of the open end of the pipe are shared, the construction accuracy is enhanced and the open end of the pipe is excellently closed. And other advantages.

[Brief description of the drawings]

FIG. 1 is a front view of a pre-sinking setup state of a pipe body.

FIG. 2 is a front view of a pipe in a laid state.

FIG. 3 is a perspective view of a tube tip.

FIG. 4 is a perspective view showing the first and second examples of the locking box in a built-in state.

FIG. 5 is a front view of the first locking box itself.

FIG. 6 is a plan view thereof.

FIG. 7 is a bottom view.

FIG. 8 is a side view.

FIG. 9 is a plan view of the second locking box itself.

FIG. 10 is a plan view showing the first and second examples of the locking box in an installed state.

FIG. 11 is a front view of a second locking box.

FIG. 12 is a transverse cross-sectional view of a leading pipe in a sunk state.

FIG. 13 shows a sunk state of a leading tube body and first and second tubes.
It is a built-in vertical cross-sectional view of a locking box example.

FIG. 14 is a longitudinal sectional view of a subsequent excavation start state of excavation.

FIG. 15 is a front view of a first locking box used in the second embodiment.

FIG. 16 is a vertical sectional view showing a sunk state of a leading tube body and a first and a second example of a locking box according to a second embodiment.

[Explanation of symbols]

2: excavation groove, 2A: subsequent excavation groove, 3: human hole, 10: preceding pipe, 20: Gevin rod, 21: guide member, 51: first
Locking box, 52 ... second locking box.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-39888 (JP, A) JP-A-55-51185 (JP, A) JP-A-57-116989 (JP, A) JP-A-60-1985 34585 (JP, A) JP-A-8-4095 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 1/024

Claims (3)

(57) [Claims] 1. A pipe body is sunk in a digging groove, and the digging groove is filled with muddy water to solidify the pipe. In a solidification process or after the solidification, a connection between a preceding pipe and a subsequent pipe is made. (1) The first locking box and the separate second locking box
A locking box is prepared, (2) the preceding pipe body is sunk in the excavation groove, and (3) the first locking box is sunk to partition the first solidification target area on the preceding pipe side. (4) Simultaneously with or before or after the first locking box is laid down, the second locking box is moved along the first locking box. (5) Thereafter, solidification of the first solidification target area is started. (6) In the solidification process of the first solidification target area, the second locking is performed. (7) After the excavation of the subsequent excavation groove is completed, a subsequent pipe body is laid in the subsequent excavation groove, and the solidification of the first solidification target area is in progress or completed. The said The locking box is removed to connect the subsequent pipe to the preceding pipe. (8) The first locking box is also removed at any stage until the connection is completed. A method of burying pipes characterized by solidification of pipes. 2. A pipe body is sunk in a digging groove, and the digging groove is filled with muddy water and solidified. In a solidification process or after the solidification, a connection between a preceding pipe and a subsequent pipe is made. (1) The first locking box and the separate second locking box
A locking box is prepared, (2) the preceding pipe body is sunk in the excavation groove, and (3) the first locking box is sunk to partition the first solidification target area on the preceding pipe side. (4) Simultaneously with or before or after the first locking box is laid down, the second locking box is moved to a position along the first locking box on the opposite side of the first solidification target area from the preceding tube. (5) Thereafter, solidification of the first solidification target area is started. (6) In the solidification process of the first solidification target area, subsequent excavation is performed on the second locking box side. (7) After the excavation of the subsequent excavation groove is completed, a subsequent pipe body is laid in the subsequent excavation groove, and while the solidification of the first solidification target area is in progress or has been completed, the second locking is performed. Bob (8) The first locking box is also removed at any stage until the connection is completed. (9) Then, in the subsequent excavation trench A method for burying pipes, which solidifies. 3. The method according to claim 1, wherein the first locking box is removed in a state where the first solidification target area is semi-solidified.