JPH10196851A - Tube guard sleeve, structure and method for connecting tube to underground structure using the same sleeve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily connect a conduit tube sheathed in a tube guard sleeve to the wall of a manhole with mortar while preventing the intrusion of water through the connection into the manhole and enabling the backfill of the peripheral area of the manhole prior to the complete solidification of the mortar filling the hole in the manhole wall. SOLUTION: A tube guard sleeve 15 comprises a tubular sheath part 17 of inside diameters larger than the outside diameter of a conduit tube 1, a tube fixing part 19 arranged at one end of the tubular sheath part 17 and formed on its inner periphery with a helical projected line 23 adapted to mesh with a helical groove cut in the outer periphery of the conduit tube 1, and a flange 25 arranged at the boundary between the tubular sheath part 17 and the tube fixing part 19. The tube fixing part 19 is first fixed on the conduit tube 1 in place and is inserted in a hole 7 formed through a wall 5. The hole 7 is then covered with the flange 25 from the outside and is filled with mortar 9. The conduit tube 1 projecting into the inside of the wall 5 is thereafter mounted at its outer periphery with a flange 21 to cover the hole 7 from the inside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective sleeve for a pipe connected to an underground structure such as a manhole, and a connecting structure and a connecting method of the pipe to an underground structure using the same.

[0002]

2. Description of the Related Art In a place where an underground structure such as a manhole is installed, a phenomenon in which the ground near the manhole relatively sinks often occurs. When such land subsidence occurs, pipes (such as flexible conduits) connected to manholes under the ground receive strong earth pressure,
The cross section is greatly deformed or destroyed. Conventionally, countermeasures as shown in FIG. 8 or FIG. 9 have been taken to prevent this.

The countermeasure in FIG. 8 is to cover a buffer pipe 3 of a required length near the end of a flexible conduit 1 and position the ends of the conduit 1 and the buffer pipe 3 in a hole 7 in a wall 5 of a manhole. Then, mortar 9 is packed in a hole 7 around the end, and the ends of the conduit tube 1 and the buffer pipe 3 are fixed to the wall 5 of the manhole. The buffer pipe 3 has an inner diameter larger than the outer diameter of the conduit 1 so as not to restrain the conduit 1. In the figure, reference numeral 11 denotes the soil buried outside the wall 5 of the manhole. With the structure as shown in FIG. 8, when land subsidence occurs near the manhole, the expansion of the conduit tube 1 is allowed in the buffer pipe 3, thereby preventing extreme cross-sectional deformation and destruction of the conduit tube 1. be able to.

[0004] The countermeasure of FIG. 9 is to cover a flexible stainless steel protective pipe 13 near the end of the flexible conduit tube 1, and to attach the end of the protective pipe 13 to a hole in the manhole wall 5. 7, a mortar 9 is packed in a hole 7 therearound, and the end of the protective pipe 13 is fixed to the wall 5 of the manhole. In this case, the end of the conduit tube 1 is not fixed to the wall 5 and can slide in the protection pipe 13 in the tube axis direction. Therefore, when land subsidence occurs near the manhole, the end of the conduit 1 is drawn into the protective pipe 13 and there is no possibility that an excessive tensile force is applied to the conduit 1. More reliable protection.

In addition, a buffer pipe is corrugated by a method using a buffer pipe as shown in FIG. 8, and the pitch or wave height of the waveform is changed in the longitudinal direction to make the bending rigidity of the buffer pipe different in the longitudinal direction. This has also been proposed (JP-A-5-332479).

[0006]

In the structure in which the ends of the pipe and the buffer pipe are fixed to the wall of the underground structure with a mortar or the like as shown in FIG. 8, only the pipe is loosely inserted into the buffer pipe. Therefore, when fixing the ends of the pipe and the buffer pipe to the wall of the underground structure with a mortar or the like, the pipe and the buffer pipe are relatively easy to move in the pipe axis direction, and the center axis of the pipe and the buffer pipe is It is also difficult to match.
For this reason, there has been a problem that the work of connecting the pipe to the wall of the underground structure is very troublesome and time-consuming. Further, the structure in which the pipe is slidable in the protection pipe as shown in FIG. 9 has a problem that water easily penetrates into the underground structure through a gap between the pipe and the protection pipe.

Further, when a pipe and a buffer pipe (or a protection pipe) are fixed to a wall of an underground structure with a mortar or an epoxy putty or the like, the pipe and the buffer pipe are fixed on a support stand or the like until the mortar or the epoxy putty or the like is completely solidified. It is necessary to fix it, and there is a disadvantage that it takes time to refill the soil around the underground structure.

A first object of the present invention is to provide a pipe protection sleeve which can easily connect a pipe to an underground structure and which can easily perform a treatment for preventing water from entering the underground structure from a connection portion. And a connection method and a connection method of a pipe to an underground structure using the same. A second object of the present invention is to
When fixing pipes and pipe protection sleeves to walls of underground structures with mortar or epoxy putty etc., soil can be backfilled around underground structures before mortar or epoxy putty etc. is completely solidified. Is to do.

[0009]

According to a first aspect of the present invention, there is provided a pipe protective sleeve having a sheath having a larger inner diameter than an outer diameter of a pipe inserted therein. A pipe fixing portion is formed on one end of the pipe so as to be attached to the outer circumference of the pipe so as not to move in the pipe axis direction and the radial direction (claim 1).

In the connection structure of a pipe to an underground structure using the pipe protection sleeve, a pipe is inserted through the pipe protection sleeve, and a pipe fixing portion of the pipe protection sleeve is fixed at a predetermined position of the pipe. A pipe portion is disposed outside the wall of the underground structure, a pipe fixing portion is disposed in a hole in the wall, and a filling (such as mortar or epoxy putty) is provided around the pipe fixing portion and the pipe in the hole. (Claim 5).

The pipe protection sleeve of the present invention can fix the pipe fixing portion at a predetermined position (near the end) of the pipe so as not to move in the pipe axis direction and the radial direction. Therefore, when the pipe and the pipe protection sleeve are fixed to the wall of the underground structure with mortar or the like, the pipe and the pipe protection sleeve do not relatively move in the pipe axis direction, and the center axis of the pipe and the pipe protection sleeve is aligned. Since there is no need to match, the work of connecting the pipe to the underground structure can be easily performed. Further, water tightness can be easily ensured by solidifying the pipe fixing portion of the pipe protection sleeve and the periphery of the pipe with mortar or the like.

When the tube is a tube with a spiral wave which is generally used as a flexible conduit, the tube protection sleeve of the present invention is provided on the inner peripheral surface of the tube fixing portion with the spiral of the outer peripheral surface of the tube. It is preferable that a spiral ridge for screw connection with the groove is formed (claim 2). In this way, the pipe fixing portion of the pipe protection sleeve can be fixed at a predetermined position of the pipe simply by inserting the end of the pipe into the pipe protection sleeve and rotating the pipe protection sleeve around the pipe.

By the way, when the sheath of the pipe protection sleeve is formed into a corrugated pipe, the ability to follow the ground subsidence is improved, and the crush resistance is also improved. However, if the tube inserted into it is also in the form of a corrugated tube, the waveform of the outer peripheral surface of the tube will be caught by the waveform of the inner peripheral surface of the sheath, and the slip of the tube in the sheath will be inhibited There is a risk. Therefore, in the case where the pipe is a corrugated pipe and the sheath of the pipe protection sleeve of the present invention is formed into a corrugated pipe, the sheath of the sheath and the corrugation of the pipe are prevented from being caught. It is desirable that the waveform of the part be different from the waveform of the tube (the direction of the waveform, the pitch of the waveform, or the like).

Next, a pipe protection sleeve of the present invention which achieves the second object in addition to the first object is the above-mentioned pipe protection sleeve, wherein the pipe fixing part is provided on the pipe fixing part side. A flange having a size to close a hole in a wall of the underground structure to be inserted is attached (claim 4).
Here, “the size to close the hole” means that the flange has a size that cannot pass through the hole. That is, not only the case where the flange has a size to completely close the hole, but also the case where the flange hits the edge along the longitudinal direction of the hole when the hole is rectangular. The method and structure for connecting a pipe to an underground structure using this pipe-protected sleeve with a flange are preferably the following two configurations.

First, the pipe is inserted through the pipe protection sleeve,
With the pipe fixing portion of the pipe protection sleeve fixed to a predetermined position of the pipe, the sheath tube side is disposed outside the wall of the underground structure, and the pipe fixing section is disposed in the hole of the wall. The flange is disposed so as to close the hole from the outside, and a flange that closes the hole from the inside is attached to a pipe or tube protection sleeve projecting into the wall (Claim 5). . The filler may be placed in the hole before or after the flange is attached to the inside of the wall.

Second, the pipe is inserted through the pipe protection sleeve,
A pipe fixing part of the pipe protection sleeve is fixed at a predetermined position of the pipe, a sheath pipe part is disposed outside a wall of the underground structure, a pipe fixing part is disposed in a hole of the wall, and a flange is formed. A bell mouth which is arranged so as to close the hole from the outside, the pipe fixing portion in the hole and the periphery of the pipe are solidified with a filler, and has a flange portion at the end of the pipe having a size to close the hole from the inside. Is attached (claim 6).

The use of the flanged pipe protective sleeve as described above can prevent external pressure from being applied to the mortar or the epoxy putty filled in the hole of the wall by the flange and the flange or the bell mouth. Alternatively, it becomes possible to backfill the soil around the underground structure before the epoxy putty or the like is completely solidified.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION

[Embodiment 1] FIG. 1 shows a first embodiment of the present invention.
The tube protection sleeve 15 used in this embodiment is formed by integrally forming a short tube fixing portion 19 at one end of a sheath 17. The conduit tube 1 is inserted through the tube protection sleeve 15. The inner diameter of the sheath 17 is larger than the outer diameter of the conduit 1 so as not to restrict the conduit 1. Sheath tube part 17
The conduit 1 is in the form of a straight tube without corrugations. On the other hand, the inner diameter of the tube fixing portion 19 is smaller than the sheath portion 17 and slightly larger than the outer diameter of the conduit tube 1.

The tube fixing portion 19 is fixed to the conduit tube 1 with an adhesive so that it cannot move in the tube axis direction and the radial direction of the conduit tube 1. The position where the pipe fixing portion 19 is fixed to the conduit tube 1 is such that when the conduit tube 1 is inserted into the hole 7 of the manhole wall 5, the sheath tube portion 17 is located outside the manhole wall 5. Is set so as to be located in the hole 7. The end of the tube fixing portion 19 is preferably located between the inner end and the outer end of the hole 7.

The mortar 9 is filled in the hole 7 around the tube fixing portion 19 and the conduit tube 1, and the mortar 9 is solidified to form the conduit tube 1 and the tube protection sleeve 15.
Is fixed to the wall 5 and watertightness is maintained. When filling the mortar 9, use the pipe protection sleeve 1
5 does not move in the longitudinal direction with respect to the conduit 1,
In addition, since there is no need to align the pipe protection sleeve 15 and the conduit tube 1, the filling operation can be performed extremely easily. By providing the pipe protection sleeve 15 as described above, when land subsidence occurs outside the manhole wall 5, it is possible to prevent stress from being concentrated on a part of the conduit pipe 1, and Can be prevented from being damaged.

[Embodiment 2] FIG. 2 shows a second embodiment of the present invention. Pipe protection sleeve 1 used in this embodiment
5 also has a short tube fixing portion 19 integrally formed on one end side of the sheath tube portion 17. However, pipe protection sleeve 15
Is in the form of a tube with spiral waves.
The inner diameter of the sheath 17 is larger than the outer diameter (maximum outer diameter) of the conduit 1 so as not to restrict the conduit 1. The sheath 17 is in the form of a straight tube without corrugations.

On the inner peripheral surface of the tube fixing portion 19, the conduit tube 1 is provided.
Spiral ridge 23 screwed with spiral groove 21 on the outer peripheral surface of
Are formed. In other words, the pipe fixing portion 19 is prevented from moving in the pipe axis direction and the radial direction of the conduit tube 1 by screwing the spiral ridge 23 on the inner peripheral surface to the spiral groove 21 on the outer peripheral surface of the conduit tube 1. It is fixed to. The position where the pipe fixing portion 19 is fixed to the conduit tube 1 is such that when the conduit tube 1 is inserted into the hole 7 of the wall 5 of the manhole, the sheath tube portion 17 is located outside the wall 5 of the manhole, and the pipe fixing portion 1 is fixed.
9 is set so as to be located in the hole 7. Pipe fixing part 19
Is preferably located between the inner and outer ends of the hole 7. The position where the tube fixing portion 19 is fixed to the conduit tube 1 can be easily adjusted by rotating the tube protection sleeve 17.

The mortar 9 is filled in the hole 7 around the tube fixing portion 19 and the tube 1, and the mortar 9 is solidified to fix the conduit tube 1 and the tube protection sleeve 15 to the wall 5, and Watertightness is maintained. When filling the mortar 9, use the pipe protection sleeve 15
Does not move in the longitudinal direction of the conduit tube 1 and there is no need to align the conduit protection sleeve 15 with the conduit tube 1. Therefore, the filling operation can be performed extremely easily.
By providing the pipe protection sleeve 15 as described above,
When land subsidence occurs outside the wall 5 of the manhole,
Concentration of stress on a part of the conduit tube 1 can be avoided, and damage to the conduit tube 1 can be prevented.

[Embodiment 3] FIG. 3 shows a third embodiment of the present invention. Pipe protection sleeve 1 used in this embodiment
5 also has a short tube fixing portion 19 integrally formed on one end side of the sheath tube portion 17. However, pipe protection sleeve 15
Is a form of a tube with a spiral wave,
Further, the sheath 17 of the tube protection sleeve 15 is in the form of a tube with an annular wave. The inner diameter (minimum inner diameter) of the sheath 17 is larger than the outer diameter (maximum outer diameter) of the conduit 1 so as not to restrict the conduit 1.

The sheath tube portion 17 is formed into a corrugated tube in order to improve the flexibility and pressure resistance of the sheath tube portion 17 and to more reliably protect the conduit tube 1 due to land subsidence. . The thickness of the sheath tube portion 17 may be substantially constant over the entire length, but in this embodiment, the thickness of the sheath tube portion 17 is gradually reduced toward the tip (the pitch and height of the waveform are constant). This is because, by increasing the bending rigidity of the sheath tube portion 17 near the wall 5 and decreasing the bending rigidity of the sheath tube portion 17 as the distance from the wall 5 increases, the bending deformation of the conduit tube 1 at the time of ground subsidence is minimized. It is to suppress. In order to make the bending rigidity of the sheath 17 smaller toward the tip, for example, the wall thickness and the pitch of the waveform may be kept constant, and the wave height of the waveform may be increased toward the tip.

The reason why the waveform of the sheath tube portion 17 is formed into an annular waveform (independent waveform) is that the waveform of the conduit tube 1 is a spiral waveform. This is so as not to fall into the trough of the waveform on the peripheral surface.
Thereby, the conduit tube 1 can smoothly slide and move in the sheath 17. The same effect can be obtained even if the waveform of the sheath 17 is changed to a spiral waveform in which the spiral direction is opposite to the spiral waveform of the conduit tube 1.

On the inner peripheral surface of the tube fixing portion 19, the conduit tube 1 is provided.
Spiral ridge 23 screwed with spiral groove 21 on the outer peripheral surface of
Are formed. In other words, the pipe fixing portion 19 is prevented from moving in the pipe axis direction and the radial direction of the conduit tube 1 by screwing the spiral ridge 23 on the inner peripheral surface to the spiral groove 21 on the outer peripheral surface of the conduit tube 1. It is fixed to. The position where the pipe fixing portion 19 is fixed to the conduit tube 1 is such that when the conduit tube 1 is inserted into the hole 7 of the wall 5 of the manhole, the sheath tube portion 17 is located outside the wall 5 of the manhole, and the pipe fixing portion 1 is fixed.
9 is set so as to be located in the hole 7. Pipe fixing part 19
Is preferably located between the inner and outer ends of the hole 7. The position where the tube fixing portion 19 is fixed to the conduit tube 1 can be easily adjusted by rotating the tube protection sleeve 17.

The mortar 9 is filled in the hole 7 around the tube fixing portion 19 and the tube 1, and the mortar 9 is solidified to fix the conduit tube 1 and the tube protection sleeve 15 to the wall 5, and Watertightness is maintained. When filling the mortar 9, use the pipe protection sleeve 15
Does not move in the longitudinal direction of the conduit tube 1 and there is no need to align the conduit protection sleeve 15 with the conduit tube 1. Therefore, the filling operation can be performed extremely easily.
By providing the pipe protection sleeve 15 as described above,
When land subsidence occurs outside the wall 5 of the manhole,
Concentration of stress on a part of the conduit tube 1 can be avoided, and damage to the conduit tube 1 can be prevented.

[Embodiment 4] FIG. 4 shows a fourth embodiment of the present invention. This embodiment is an improvement of the third embodiment, and is different from the third embodiment in that a flange 25 is attached to the boundary between the sheath 17 of the tube protection sleeve 15 and the tube fixing portion 19. That is, the flange 27 is attached to the outer periphery of the conduit tube 1 protruding inside the wall 5 of the manhole. The flange 25 and the flange 27 have a size that closes the hole 7 of the wall 5. The position of the flange 25 is fixed to the fixing portion 19 of the pipe protection sleeve 15 in a state of contacting the outer surface of the wall 5.
The side ends are designed to be located between the inner and outer ends of the hole 7.

Therefore, when the pipe fixing portion 19 of the pipe protection sleeve 15 is inserted into the hole 7, the flange 25 is in a state of closing the hole 7 from the outside. In this state, the mortar 9 is filled around the tube fixing portion 19 and the conduit tube 1 in the hole 7. Further, when the flange 27 is screwed onto the outer periphery of the conduit tube 1 projecting into the wall 5, the flange 27 closes the hole 7 of the wall 5 from the inside. The flange 25 and the flange 27 sandwich the wall 5 to temporarily support and fix the conduit tube 1 and the tube protection sleeve 15.
After the mortar 9 has solidified, the conduit 1 along the inner surface of the wall 5
And the flange 27 is cut and finished.

With such a configuration, since there is no possibility that external pressure is applied to the mortar 9 filled in the hole 7, the soil can be backfilled around the manhole before the mortar 9 is completely solidified. The period can be shortened. The position of the flange 25 is designed so that the end of the pipe protection sleeve 15 on the fixing portion 19 side is located in the middle of the hole 7 that is easily watertight when the hole 7 is backfilled with the mortar 9 as described above. Therefore, the connection method of this example is easily watertight. The flange 27 is a conduit tube (tube with spiral wave) 1
It is preferable to be able to be attached to the outer periphery by screw connection. The mortar 9 has a flange 2 inside the wall 5.
After the 7 is attached, it may be inserted into the hole 7 through a gap.

Since the configuration, operation and effect other than the above are the same as those of the third embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted. The use of the flanged pipe protection sleeve and the flange is also applicable to the first or second embodiment.

[Fifth Embodiment] FIG. 5 shows a fifth embodiment of the present invention. This embodiment is also a modification of the third embodiment, and is different from the third embodiment in that a flange 25 is attached to the boundary between the sheath 17 of the pipe protection sleeve 15 and the pipe fixing portion 19. The bell mouth 29 is attached to the end of the conduit 1 without projecting the conduit 1 inside the wall 5. The flange 25 has a size that closes the hole 7 of the wall 5, and the bell mouth 29 has a flange portion 29 a that is large enough to close the hole 7 of the wall 5.

Therefore, when the pipe fixing portion 19 is inserted into the hole 7, the flange 25 closes the hole 7 from the outside. The mortar 9 is filled in the hole 7 around the tube fixing portion 19 and the conduit tube 1. When the bell mouth 29 is attached to the end of the conduit tube 1, the flange portion 29 a closes the hole 7 of the wall 5 from the inside. Further, since the flange 25 and the flange portion 29 a sandwich the wall 5, the conduit tube 1 and the pipe protection sleeve 15 are temporarily fixed to the wall 5.

With such a configuration, since there is no possibility that external pressure is applied to the mortar 9 filled in the hole 7, the soil can be backfilled around the manhole before the mortar 9 is completely solidified. The period can be shortened. In addition, the bell mouth 2 used for this pipe connection structure
9 can be used as it is, so that the treatment of the inner surface of the wall 5 after the construction is simpler than in the fourth embodiment. It is preferable that the bell mouth 29 is screwed inside the end of the conduit tube (tube with spiral waves) 1.

Since the configuration, operation and effect other than the above are the same as those of the third embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted. The use of a flanged pipe protection sleeve and a bell mouth with a flange portion is also applicable to the first or second embodiment.

[Embodiment 6] FIGS. 6 and 7 show a sixth embodiment of the present invention. This embodiment corresponds to the fourth embodiment.
However, the difference from the fourth embodiment is that solid ribs 31 are formed at predetermined intervals in the circumferential direction (preferably at 90 ° intervals) at the valleys of the waveform of the sheath tube 17. That is. The ribs 31 are formed to increase the bending rigidity of the sheath 17.

Since the configuration, operation and effect other than the above are the same as those of the fourth embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted. Forming the ribs at the valleys of the corrugations of the pod tube is also applicable to the third or fifth embodiment.

[0039]

As described above, according to the present invention, the pipe fixing portion of the pipe protection sleeve can be fixed at a predetermined position of the pipe so as not to move in the pipe axis direction and the radial direction. When the protection sleeve is fixed to the wall of the underground structure with a filler such as mortar, the pipe and the pipe protection sleeve do not relatively move in the pipe axis direction, and the center axes of the pipe and the pipe protection sleeve are aligned. There is no need to do this, so that the work of connecting the pipe to the underground structure can be easily performed. Further, by fixing the pipe fixing portion of the pipe protection sleeve to the pipe, it is possible to easily perform a process for ensuring watertightness.

If a pipe-protecting sleeve with a flange is used, the soil is buried around the underground structure before the filling material such as mortar filled in the hole of the underground structure completely solidifies. This makes it possible to shorten the construction period.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a second embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the present invention.

FIG. 4 is a sectional view illustrating a fourth embodiment of the present invention.

FIG. 5 is a sectional view showing a fifth embodiment of the present invention.

FIG. 6 is a sectional view showing a sixth embodiment of the present invention.

FIG. 7 is a sectional view of a sheath tube portion of a tube protection sleeve used in a sixth embodiment.

FIG. 8 is a sectional view showing an example of a conventional connection structure of a pipe to an underground structure.

FIG. 9 is a cross-sectional view showing another example of a conventional connection structure of a pipe to an underground structure.

[Explanation of symbols]

 1: Conduit tube 5: Manhole wall 7: Hole 9: Mortar 15: Tube protection sleeve 17: Sheath tube portion 19: Pipe fixing portion 21: Corrugated valley 23: Spiral ridge 25: Flange 27: Flange 29: Bell Mouse 29a: Flange

Claims (6)

[Claims] 1. A sheath (17) having an inner diameter larger than the outer diameter of a tube (1) inserted therein.
7) A pipe fixing part (1) attached to one end side of the pipe (1) so as to be immovable in the pipe axis direction and the radial direction.
9) A pipe protection sleeve characterized by forming the above. 2. A helical ridge (23) formed on the inner peripheral surface of the tube fixing portion (19) to be screw-coupled to a helical groove on the outer peripheral surface of the tube (1). Pipe protection sleeve as described. 3. A pipe fixing part (19) is provided on the pipe fixing part (19) side.
The pipe protection sleeve according to claim 1 or 2, wherein a flange (25) sized to close a hole (7) of a wall (5) of the underground structure into which the underground structure is inserted is attached. 4. A tube (1) is inserted through a tube protection sleeve (15) according to any one of claims 1 to 3, and a tube fixing portion (19) of the tube protection sleeve is positioned at a predetermined position of the tube (1). The tube fixed (17) side is placed outside the wall (5) of the underground structure, and the tube fixing portion (19) is inserted into the hole (7) of the wall (5). With the hole (7)
A structure for connecting a pipe to an underground structure, characterized in that the pipe fixing part (19) and the periphery of the pipe (1) are fixed with a filler (9). 5. A tube (1) is inserted through a tube protection sleeve (15) according to claim 3, and a tube fixing portion (1) of the tube protection sleeve.
9) fixing the pipe (1) in a predetermined position, disposing the sheath (17) outside the wall (5) of the underground structure,
The pipe fixing part (19) is arranged in the hole (7) of the wall (5), the flange (25) is arranged so as to close the hole (7) from the outside, and the inside of the wall (5). Tube protruding into the (1)
Alternatively, a method of connecting a pipe to an underground structure, wherein a flange (27) for closing the hole (7) from the inside is attached to the pipe protection sleeve (15). 6. A pipe protection sleeve (15) according to claim 3, wherein the pipe (1) is inserted through the pipe protection sleeve (15), and the pipe fixing part (1) of the pipe protection sleeve.
9) is fixed at a predetermined position of the pipe (1), a sheath (17) is arranged outside the wall (5) of the underground structure, and a pipe fixing part (19) is formed on the wall (5). It is arranged in the hole (7), and the collar (25) is arranged so as to cover the hole (7) from the outside, and around the pipe fixing part (19) and the pipe (1) in the hole (7). Is fixed with a filler (9), and a bell mouth (29) having a flange (29a) large enough to close the hole (7) from the inside is attached to an end of the tube (1). Features of connecting pipes to underground structures.