JPH10331578A - Driving engineering method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency at the time of extending propulsion pipes by fitting, engaging and connecting a cover body to a slit after inserting pipings and cables into the inside of a pipe main body through the slit and driving a driving pipe with a preceding driving pipe by a propulsion device thereafter. SOLUTION: A driving pipe is constituted by fitting and engaging a cover body 3 with a slit provided along overall length of a pipe main body 2 free to fit and install on it. The driving pipes lifted down on a base 40 from the ground are pushed forward into the inside of a drilling pit 43 under the ground by sequentially extending them. A piping 45 and a cable 46 connected to various machines and equipment set on the ground around a starting pit 38 are drawn in the inside of the driving pipes in the inside of the drilling pit 43. A propulsion device 42 is contracted before hanging a new driving pipe in the starting pit 38, a push wheel is moved backward, and the new driving pipe is hung in between the push wheel and the driving pipe at the extreme rear. Thereafter, the slit of the pipe main body 2 is opened by lifting up the cover body 3, and the piping 45 and the cable 46 are passes through the slit and a slit 48 of the push wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a propulsion method.

[0002]

2. Description of the Related Art A propulsion method has been frequently used as a method of burying a ductwork without causing congestion of an underground object or a traffic obstacle. The length of the propulsion pipe used in this method is 0.4 considering the water stoppage and seismic resistance of the joint part of the propulsion pipe in the curved part included in the construction area.
範 囲 2.43 m.

[0003] The above-mentioned propulsion pipe is generally a centrifugal reinforced concrete pipe (so-called fume pipe). The front end of the propulsion pipe as viewed in the propulsion direction is formed into a slightly smaller diameter to serve as an inlet, and the rear end is made of a steel plate. Are integrally provided.

[0004]

In the propulsion method, the propulsion pipe as described above is pushed in by a propulsion device while sequentially adding the propulsion pipe in the starting pit. In this case, inside the propulsion pipe, plumbing pipes such as a drain pipe, a hydraulic hose, a blower pipe, a water supply pipe, and a lubricant supply pipe,
Cables for power supply, measurement management, control, and the like are inserted, and these pipes and cables are drawn out of the starting pit to the ground, and are respectively connected to facilities on the ground.

As described above, when a new propulsion pipe is to be added while the pipes and cables are inserted through the cylindrical propulsion pipe, the pipes and cables are once cut off and the new propulsion pipe is cut off. It is necessary to install the propulsion pipe in the starting pit, reconnect the pipes and cables after inserting the cut ends of the propulsion pipe into the propulsion pipe.

[0006] The above-mentioned pipes are steel pipes, FRP pipes, or the like, and are connected using joints. The length of the pipes is the same as that of the propulsion pipe (0.4 to 2.43 m). Since a shorter part is used in the part, the frequency of disconnection and reconnection of the piping is increased, which causes a significant decrease in work efficiency.

[0007] In particular, the sludge pipe is separated from the above-mentioned sludge tank by a head difference, and when separated, the sludge flows backward and spouts into the starting pit, thereby polluting the inside of the starting pit and workers. Work in the mine is a major cause of difficulty.

Therefore, the present invention provides a propulsion method in which pipes and cables can be refilled without disconnecting the propulsion pipe when refilling the propulsion pipe, thereby improving work efficiency and eliminating contamination by sludge. That is the task.

[0009]

In order to solve the above-mentioned problems, a propulsion method according to the present invention comprises a concrete pipe main body having a slit of a required width provided over the entire length thereof, and a detachable and removable fit in the slit. A propulsion pipe comprising a concrete lid fitted and connected to the pipe main body by coupling means is used. The propulsion pipe is hung in the start pit while the lid is fixed to the pipe main body, After the lid is removed and the slit is opened, pipes and cables drawn out from the last propulsion pipe are inserted through the slit into the inside of the pipe main body, and then the lid is engaged with the slit. The propulsion device is stopped and coupled, and then the propulsion device is propelled by the propulsion device together with the preceding propulsion tube.

[0010] In the above-mentioned propulsion method, a notched circular pressing wheel having a slit is interposed between the propulsion pipe and the propulsion device so that the slit matches the slit of the pipe body.
When pipes and cables are inserted into the slit of the pipe body, they can be inserted simultaneously into the slit of the pressing ring.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1A and 1B, a propulsion pipe 1 for a propulsion method according to the present invention comprises a pipe main body 2 and a lid 3.
Consists of The pipe main body 2 and the lid 3 are both made of reinforced concrete having the same radius of curvature. The tube body 2 is provided with a slit 4 having a required width over the entire length thereof, and the lid 3 is fitted and locked inside the slit 4 so as to be freely detachable.

As shown in FIG. 2, the width of the slit 4 has a width corresponding to the central angle θ of the tube main body 2 (90 degrees in the case shown). The center angle θ, that is, the width of the slit 4 is appropriately selected within a range where the pipes and cables used in the propulsion method can be freely passed and the necessary strength of the pipe main body 2 is maintained. Desirably, it is desirable to select an angle of 90 degrees or an angle near it (about ± 10 degrees).

The distribution of the earth pressure acting on the propulsion pipe is as follows:
As shown in FIG. 3, the tensile stress is distributed in a range indicated by a sign a of ± 45 degrees with respect to a vertical reference line V passing through the center of the propulsion pipe 1, and a horizontal reference line H The compressive stress is distributed in a range indicated by a sign b of ± 45 degrees with respect to. The inflection point c at which the tensile stress changes to the compressive stress is a portion where the pressure distribution is minimized. Therefore, by locating the joint between the pipe body 2 and the lid 3 at the inflection point c, the load resistance of the propulsion pipe can be maintained equal to that of a normal propulsion pipe.

The pipe main body 2 has a main body side plate 5 (see FIG. 2) made of a steel plate on both inner side surfaces of the slit 4, and a main body female joint made of a steel plate is provided at the rear end (reception side) of the main body side plate 5. 6 (FIG. 1
) Is provided, and a main body male joint 7 also made of a steel plate is provided at the front end (insertion side).

As shown in FIGS. 4 and 5, the main body side plate 5 has an engaging step 8 projecting inwardly of the slit 4 at an intermediate portion in the width direction over the entire length.

A part of the main body side plate 5 is provided with a tapered positioning recess 9 whose upper end side is widened and narrowed downward.

The main body side plate 5 is provided with bolt holes 11 at regular intervals in the longitudinal direction thereof.
The bolt operation box 12 is integrally provided on the inner surface of the main body side plate 5 (the surface opposite to the slit 4) (FIG. 7).
(B)). The bolt operation box 12 is open to the inner surface of the tube body 2.

Further, the main body female joint 6 is shown in FIG.
As shown in FIG. 3, the center of a joint plate 14 having a cutout section is welded to the outer periphery of a cutout end plate 13 along the rear end face of the pipe body 2. And the other part is integrated with the concrete 15 of the pipe body 2. The end plate 13 and the joint plate 14 are welded and integrated to the rear end of the main body side plate 5, that is, the female end. Lower joints 16 are formed on both side surfaces of the joint plate 14 for a joint.

As shown in FIGS. 5 and 8, the concrete 15 of the pipe body 2 has a small diameter portion 18 at a front end thereof via a step 17.
Is provided.

As shown in FIG. 6 and FIG. 8, the main body male joint 7 has a circular shape along the outer circumference of the small diameter portion 18 on the outer circumference of the partially circular end plate 19 along the end face of the small diameter portion 18. The arc-shaped small-diameter joint plate 21 is welded, and the arc-shaped large-diameter joint plate 22 along the outer periphery of the large-diameter portion of the concrete 15 is connected to the small-diameter joint plate 21 via a spacer 23 corresponding to the height of the step portion 17. Is welded to the outer surface of the end. Two ribs 24 parallel to the circumferential direction are integrally welded to the outer surface of the small-diameter joint plate 21 to prevent a later-described packing 25 from shifting.

A reinforcing bar 26 is provided in the length direction and the width direction between the main body female joint 6 and the main body male joint 7, and forms a skeleton of the pipe main body 2.

On the other hand, the cover 3 is
Are provided with hanging bolt insertion holes 27 (see FIGS. 1 and 2), and a steel plate cover side plate 5 'is provided on both outer surfaces of the concrete 15' (see FIG. 4). At the rear end of the side plate 5 ', a female joint 6' made of steel plate is provided, and at the front end, a male joint 7 'made of steel plate is also provided (see FIG. 5).

The lid side plate 5 'is shown in FIGS.
As shown in (a), a locking recess 8 ′ is provided in the middle portion in the width direction over the entire length, and is locked on the locking step 8 of the main body side plate 5. The locking positions the lid 3 in the radial direction with respect to the tube body 2.

FIG. 4 shows a part of the lid side plate 5 '.
As shown in FIG. 5A and FIG. 5, a tapered positioning projection 9 ′ having a wide upper end and narrowing downward is provided, and is vertically detachable in the positioning recess 9 of the main body side plate 5. Is fitted to. The fitting positions the lid 3 in the longitudinal direction with respect to the tube body 2.

The cover side plate 5 'is provided with a bolt hole 11' corresponding to the bolt hole 11 of the main body side plate 5, and a nut 28 is welded to the inner surface of the bolt hole 11 '(FIG. 7 (b)).

The lid female joint 6 'has an arc-shaped end plate 13' along the rear end face of the lid 3 (see FIG. 4A).
The center part of an arc-shaped joint plate 14 'is welded to the outer surface of the joint plate 14'. About half of the joint plate 14 'protrudes rearward beyond the end plate 13', and the remaining part is the concrete 1 of the lid 3
Integrated with 5 '. The end plate 13 'and the joint plate 14'
Are integrally welded to the rear end of the lid side plate 5 '.

On both sides of the joint plate 14 ', FIG.
As shown in (a), the lower concave portion 16 ′ for a split joint is used.
Is formed, and is combined with the lower projection 16 of the joint plate 14 of the female female joint 6 in a notched joint shape (see FIG. 7A).

As described above, the structure of the cover female joint 6 ′
The main body female joint 6 has the same structure as the main body female joint 6 except for the size of the central angle. In a state where the lid 3 is fitted and locked in the slit 4 of the pipe main body 2 to form the propulsion pipe 1, the female female joint 6 and the female lid 6 ′ constitute an annular female joint 29 as a whole ( FIG. 1A).

As shown in FIG. 8, the concrete 15 'of the lid 3 is provided with a small diameter portion 18' at the front end via a step 17 ', and the male male cover 7' is provided with the small diameter portion 18 '. The small-diameter portion 18 '
The arc-shaped small-diameter joint plate 21 'along the outer periphery of the concrete 15' is welded and the arc-shaped large-diameter joint plate 22 'along the outer periphery of the large-diameter portion of the concrete 15' is spacers corresponding to the height of the step 17 '. This is welded to the outer surface of the end of the small-diameter joint plate 21 ′ via 23 ′. Two ribs 24 ′ are provided on the outer surface of the small-diameter joint plate 21 ′ in parallel with the circumferential direction, and together with the ribs 24 on the pipe main body 2 side, the packing 25 is prevented from slipping.

As described above, the structure of the cover male joint 7 'is the same as that of the above-described main body male joint 7 except for the size of the central angle, and the other structures are the same. An annular male joint 31 is constituted by the joint 7 '(FIG. 1 (a)).
reference).

A reinforcing bar 26 'is provided in the length direction and the width direction between the female cover joint 6' and the male cover joint 7 'to form a skeleton of the cover 3.

In the propulsion pipe 1 described above, after the skeleton of the pipe body 2 and the skeleton of the lid 3 are housed in a cylindrical form inside a cylindrical form, concrete is put in, and the form is put into the cylindrical form. It is formed by rotating at high speed and applying centrifugal force. During the molding, the main body side plate 5 and the lid body side plate 5 'hinder the circumferential flow of the concrete, and the finished surface of the concrete near these side plates 5, 5' may be recessed. In order to do so, as shown in FIG.
The height of 5 ′ (height based on the outer peripheral surface of concrete 15, 15 ′) may be formed to be lower than the finished inner peripheral surface of concrete 15, 15 ′. By doing so, the fluidity of the concrete is improved, and the finished heights of the inner peripheral surfaces of the concretes 15 and 15 'are made uniform.

If both side plates 5, 5 'are formed low as described above, a concave portion is formed between the side plates 5, 5' and the inner peripheral surface of the concrete 15, 15 ', so that this portion is also filled with concrete. However, the filled concrete can be easily removed by adding a filer after molding, and the removal results in a main body side step 32 and a lid side step 32 '. When these two step portions 32 and 32 ′ are abutted in the circumferential direction, a mounting groove 34 of the packing 33 in the length direction is formed.

Concrete 1 between the joint plate 14 'of the female cover joint 6' and the large-diameter joint plate 22 'of the male cover joint 7'.
A protective steel plate made of a steel plate covering the exposed portion of 5 ′ may be provided integrally with the concrete 15 ′. FIG. 10 shows a case where the two joint plates 14 ′ and 22 ′ are integrated and the joint plates 14 ′ and 22 ′ are also used by one protective steel plate 35.

The above-mentioned protective steel plate 35 can be used when boring or the like is mistakenly performed from the ground after the propulsion pipe 1 is buried.
The propulsion pipe 1 is prevented from being destroyed.

The propulsion tube 1 according to the embodiment is as described above. After the centrifugal molding in the factory, a suspension bolt 37 (see FIG. 2) is attached to the suspension bolt insertion hole 27 of the cover 3 and the lifting machine is used. The lid 3 is temporarily removed from the pipe main body 2 (see a two-dot chain line in FIG. 2), and a sealing agent 36 (see FIG. 7) is filled between the main body side plate 5 and the lid side plate 5 ′. Into the slit 4 and the bolt operation box 12
The bolt 37 is inserted into the bolt holes 11 and 11 ′ and the cover 3 is integrally connected to the pipe body 2 by screwing to the nut 28, and further, around the small-diameter joint plates 21 and 21 ′ of the male joint 31. The packing 25 is mounted between the ribs 24 and 24 'and transported to the site.

FIG. 11 shows a portion of a starting shaft 38 in which the above-described propulsion pipe 1 is used to carry out the propulsion method. Start pit 38
A propulsion device 42 including a required number of jacks 39, reaction force support walls 41, and the like, a base 40, and the like are installed in the inside. The propulsion pipes 1 suspended from the ground on the base 40 are sequentially added to each other, and Push into the excavation pit 43. On the ground around the starting pit 38, a lifting machine 44, a sludge tank 52, a winding drum 53, and other various kinds of machinery and equipment required for the propulsion method are installed, and various pipes 45 and cables 4 connected to these are installed.
Class 6 is drawn into the propulsion pipe 1 in the excavation pit 43.

A pressing wheel 47 is interposed on the rear end face of the rearmost propulsion pipe 1 to which a propulsion force is directly applied by the propulsion device 42 via a cushion material 49. As shown in FIG. 14, the pressing ring 47 is formed by a missing circular member having a slit 48 that matches the end face of the tube body 2.

In FIG. 14, the position at which the jack 39 is pressed against the end face of the pressing wheel 47 is indicated by a chain line.

As shown in FIG. 11, when the propulsion of the last propulsion pipe 1 is completed, the pipe 45 and the cable 46 are pulled out from the slit 48 of the pressing wheel 47 to the ground, and the pipe 4
5 is connected to the sludge tank 52 or the like with a required extra length,
The cable 46 is connected to required equipment via a winding drum 53.

Next, as shown in FIG. 12, the propulsion device 42 is contracted before the new propulsion tube 1 is suspended in the starting shaft 38,
The push wheel 47 is moved backward by the lifting device 44, and a new propulsion pipe 1 is suspended between the push wheel 47 and the last propulsion pipe 1. The center is aligned with the last propulsion tube 1 on the base 40, and the operator operates the bolt operation box 12 from inside the new propulsion tube 1.
(Refer to FIG. 7 (b)) Insert a tool and remove the bolt 37.

Thereafter, as shown in FIG. 13, the lid 3 is lifted to open the slit 4 of the pipe main body 2, and the slit 4 and the slit 48 of the pressing ring 47 are pulled out from the rear end of the last propulsion pipe 1. The pipe 45 and the cable 46 are passed (see FIG. 14). Thereafter, the lid 3 is fitted and locked in the slit 4 again, and the bolt 37 is fastened. Next, the end plates 13, 13 'of the female joint 29 at the rear end of the last propulsion tube 1,
A cushion material 49 is interposed between the new propulsion pipe 1 and the end plates 19 and 19 ′ of the male joint 31, and a sealant 51 is provided.
(See FIG. 8).

Thereafter, the propulsion device 42 is slightly moved to push the push wheel 4.
7, the new propulsion pipe 1 is pushed, and the male joint 31 of the propulsion pipe 1 is inserted into the female joint 29 of the last propulsion pipe 1. As a result of the insertion, the packing 25 comes into close contact with the inner peripheral surface of the female joint 29, and the sealing agent 51 is compressed and enters the gap. As the sealant 51 in this case, a material obtained by adding a curing agent to liquid polybutadiene (commercially available under the trade name of “TS seal”) is preferable.

After completing the above preparations, the propulsion device 4
2 is driven to propel all the preceding propulsion tubes 1 in the excavation pit 43 together with the new propulsion tube 1. Thereafter, a new propulsion pipe is added and propelled one after another in the same manner.

The pipe 45 has an appropriate extra length on the ground, so that it is not necessary to add another pipe until the extra length is exhausted. However, when the extra length is exhausted, it is necessary to add a new pipe 45. In this case, since the replenishment is performed on the ground which is not affected by the head difference, there is no contamination of the surrounding area due to the ejection of the sludge.

[0046]

As described above, the propulsion method according to the present invention does not require disconnection and reconnection of pipes and cables when refilling the propulsion pipe, so that the efficiency of the replenishment work is remarkably improved. Since no mud is blown out, contamination of the surrounding area is prevented. Further, since a flexible tube can be used for the piping, a curved portion can be dealt with without using a joint.

[Brief description of the drawings]

FIG. 1A is a perspective view of a propulsion pipe according to an embodiment. FIG. 1B is an exploded perspective view of the same.

FIG. 2 is an enlarged sectional view of the above.

FIG. 3 is a pressure distribution diagram of the above.

FIG. 4 (a) is a partial perspective view of a lid body of the above, and (b) is a partial perspective view of a pipe body of the same.

FIG. 5 is a partially cut-away exploded perspective view of the same.

FIG. 6 is a perspective view of a front end portion of the pipe body according to the first embodiment;

7A is a sectional view taken along line 7a-7a in FIG. 1A. FIG. 7B is a sectional view taken along line 7b-7b in FIG. 1B.

FIG. 8 is a sectional view of a butt portion of the propulsion tube according to the first embodiment.

FIG. 9 is a sectional view of a modified example taken along line 7a-7a of FIG.

10 (a) is a perspective view of a modification of the above lid, and FIG. 10 (b) is an enlarged sectional view of FIG. 10 (a).

FIG. 11 is a sectional view showing the state of implementation of the propulsion method.

FIG. 12 is a sectional view showing the state of implementation of the propulsion method.

FIG. 13 is a sectional view showing the state of implementation of the propulsion method.

FIG. 14 is a partial perspective view when the propulsion method is implemented.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Propulsion pipe 2 Pipe main body 3 Lid 4 Slit 5 Main body side plate 5 'Lid side plate 6 Main body female joint 6' Lid female joint 7 Main body male joint 7 'Lid male joint 8 Locking step 8' Locking recess 9 Positioning concave part 9 'Positioning convex part 11 Bolt hole 11' Bolt hole 12 Bolt operation box 13 End plate 13 'End plate 14 Joint plate 14' Joint plate 15 Concrete 15 'Concrete 16 Lower protrusion 16' Lower recess 17 Step 17 ' Step 18 Small diameter portion 18 'Small diameter portion 19 End plate 19' End plate 21 Small diameter joint plate 21 'Small diameter joint plate 22 Large diameter joint plate 22' Large diameter joint plate 23 Spacer 23 'Spacer 24 Rib 24' Rib 25 Packing 26 Iron bar 26 'Reinforcing bar 27 Hanging bolt insertion hole 28 Nut 29 Female joint 31 Male joint 32 Body side step 32' Lid side step 33 Packing 34 Mounting groove 3 Reference Signs List 5 protection steel sheet 36 sealant 37 hanging bolt 38 starting pit 39 jack 40 base 41 reaction force support wall 42 propulsion device 43 excavation pit 44 lifting machine 45 pipe 46 cable 47 press ring 48 slit 49 cushion material 51 sealant 52 draining tank 53 winding drum

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuyoshi Miyahara 961 Toendo, Aichigawa-cho, Aichi-gun, Shiga Prefecture Inside Kurimoto Concrete Industries Co., Ltd. Address 47

Claims (2)

[Claims] 1. A concrete pipe main body provided with a slit of a required width over the entire length, and a concrete lid body fitted in the slit so as to be freely detachable and coupled to the pipe main body by coupling means. Using a propulsion tube consisting of: the propulsion tube was hung in a starting pit while the lid was fixed to the pipe body, the lid was removed in the starting pit to open a slit, and the propulsion tube was pulled out from the last propulsion tube. After the pipes and cables are inserted into the inside of the pipe main body through the slits, the lid is fitted and locked to the slits and coupled, and then the propulsion device propels the propulsion pipe together with the preceding propulsion pipe. Construction method. 2. The propulsion method according to claim 1, wherein a cut-out press ring having a slit is interposed between the propulsion pipe and the propulsion device so that the slit matches the slit of the pipe main body, and the slit of the pipe main body is interposed. A propulsion method in which pipes and cables are inserted into the slits of the push ring at the same time when they are inserted into the pipe.