JPS62189297A - Embedding pipe for curved passage - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to buried pipes for curved roads, and in particular to a propulsion method in which hume pipes, etc. are sequentially laid in an excavated pit using a press-in device installed in the pit. This invention relates to a buried pipe for curved roads which is suitable for use.

<Prior Art> In general, the laying of hume pipes by the propulsion method is carried out by the method shown in FIG. 9. That is, a series of hume pipes 31, 31 . While excavating the face ground with the shield excavator 28 installed at the tip of the above-mentioned series of hume pipes 31, 31. ... rear end, i.e. starting shaft 29
New hume pipes are successively inserted into the starting shaft 29, and the new hume pipes are propelled forward in accordance with the excavation speed by a press-in device (not shown) provided in the starting shaft 29, thereby moving the series of hume pipes 31 forward at once. It is designed to be moved. Then, a connecting portion 32 between the Huum tubes 31
In the straight part 30a of the pit, the pipe mouth area is completely in contact with no opening, but in the curved part 30b of the pit, the curvature is half tMR+, and outside of R2 (usually 100 m or more), the opening S, , S2. S.

S, , S5, while contacting each other in a state close to point contact on the inside. FIG. 10 is a detailed sectional view showing such a state, in which the adjacent hume pipes 31 and 31' have an annular rubber gasket 3 fitted on the outer periphery of the end of one of the pipes 31' and 31'.
They are connected to each other by a steel collar 34 that tightly fits on both ends through the connecting portion 3, and the press-fitting thrust transmitted from the rear hume pipe by the press-fitting device is applied to the connecting portion 3, which is close to point contact.
5, this connection portion 35 reaches a stress greater than the proof stress of the hume tube, causing cracks 36 and breakage.

Conventionally, in order to prevent such cracks and damage, methods such as those shown in FIGS. 11 and 12 have been used in the enclosure propulsion construction method. That is, the respective hume pipes 31, 31 are connected to each other by a steel collar 34 via an annular rubber gasket 33.
A plurality of seat plates 37 and 37' are provided on opposite end surfaces of ', respectively.
The screw jacks 38 are inserted between these seat plates 37.37 degrees at equal intervals in the circumferential direction, and the screws are adjusted to follow the enclosure with the radius of curvature R, thereby dispersing the press-fitting thrust. This prevents damage to the end of the hume tube.

<Problems to be solved by the invention> However, in the conventional Huyum tube enclosure propulsion construction method,
As the shield tunneling machine 28 at the tip (see FIG. 9) moves forward, the connections 32, 32. ...
Since the opening lengths Sl, . As a result, the frequency of adjustment and the number of adjustment points become extremely large, and the adjustment work is limited to a narrow hume pipe, resulting in an extremely low work efficiency. Therefore, currently, the hume pipes that can be constructed using this method are limited to those with an inner diameter of 1 m or more, considering the work space and construction efficiency, and there is a problem in that smaller diameter hume pipes cannot be constructed.

Therefore, an object of the present invention is to develop an enclosure propulsion construction method that eliminates the need for complicated adjustment work and prevents damage to the connections between buried pipes by devising the shape of the end face of buried pipes. It is an object of the present invention to provide a buried pipe for an enclosure that can be laid with high efficiency.

<Means for Solving the Problems> In order to achieve the above object, the buried pipe for enclosure of the present invention has one end surface formed into a convex or concave surface with a certain curvature, and the other end surface formed into the convex surface. Alternatively, it is characterized by being formed into a concave or convex surface having approximately the same curvature as the concave surface.

<Function> In a series of underground enclosure pipes inserted into an excavated pit, each underground enclosure pipe with one end face convex and the other end face concave has a convex surface of a constant curvature. The front end of the enclosed enclosure pipe that is adjacent to the front is fitted into the rear end that is a concave surface with approximately the same curvature, and the The front end portions having convex surfaces of the same curvature are fitted, and each connecting portion is connected in sequence so as to be relatively rotatable and without creating an opening. Therefore, for example, when the rear end of a series of buried enclosure pipes is propelled forward by a press-fitting device, the press-fitting thrust is evenly distributed and applied to the end faces of the buried enclosure pipes at each connection point, causing damage to these end faces. In addition to this, each underground enclosure pipe can be freely rotated at each connection point and smoothly moved forward along the excavated tunnel enclosure, and a sequential passage is created at the rear end. By adding additional underground pipes, all of the underground pipes for the enclosure can be laid inside the mine. The same thing as described above can be said for the case where buried enclosure pipes having convex ends and concave enclosing pipes are alternately connected in series.

<Example> Hereinafter, the present invention will be explained in detail with reference to illustrated embodiments.

In Fig. 1, ■, ■, ... are Huyum pipes as buried pipes for enclosure that are successively connected in the excavated pit, 2 is a tube shaft at the front end of this Huyum pipe I, and the center is at the point C+ above. 3 is a concave hemispherical surface formed with a radius of curvature ρ, 3 is a concave hemispherical surface formed with the same radius of curvature ρ around point C6 on the tube axis 1 at the rear end of the Hume tube 1, and 4 is a concave hemispherical surface formed with the same radius of curvature ρ. The annular rubber gasket 5 fitted into the front end of the hume pipe 1 is a steel collar fitted onto the rear and front ends of the adjacent hume pipes 1,1.

The radius of curvature ρ of the two-handed spherical surfaces 2 and 3 is the Huyum canal l
The outer radius ro is approximately equal to the outer radius ro, and in any pair of adjacent Hume tubes, the convex hemispherical surface 2 at the end of one side fits tightly into the concave hemispherical surface 3 at the rear end of the other side so as to be relatively rotatable. . The rubber gasket 4 has an annular notch 6 on the outer periphery of the front end of the humid tube l.
The steel collar 5 is fitted into the annular notch 6 and the annular notch 8 on the outer periphery of the rear end of the fume tube l so as to cover the rubber packing 4. It forms an outer circumferential surface having approximately the same diameter as the hume tube 1 (see FIG. 5).

The hume pipes having the above structure are sequentially laid in the excavated pit as shown in FIG. That is, while excavating the face ground with a shield excavator installed at the tip of the pit 10 (see 28 in Fig. 9), a series of humid pipes l,
(2) The rear end of the shaft is propelled forward according to the excavation speed by a press-fitting device (not shown) provided in the starting shaft (see 29).

Then, the press-fitting thrust is applied to the hume tubes 1, 1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, s. Each connection part 9.9°...
The series of hume pipes are uniformly distributed and added to each other and transmitted to the tip, and the series of hume pipes can freely rotate at each connection point to connect the excavated hole 1.
It moves smoothly all at once along the four paths of 0. In this way, when the above-mentioned press-fitting device finishes propelling the stroke for one hume pipe, a new hume pipe is inserted into the above-mentioned starting shaft, fitted into the rear end of the series of hume pipes, and similarly moved forward according to the excavation speed. It promotes it.

FIG. 2 shows a modification of the embodiment shown in FIG. The configuration is the same as that of FIG. 1 except that it is a constant value that is larger and smaller than the outer radius ro.

For this reason, a stepped portion 11 is formed between the annular notch 6 on the outer periphery of the front end of the fume tube 1 and the convex hemispherical surface 2. The fume pipes 1 are sequentially laid in the excavated pit 10 as shown in FIG. 4.

FIG. 5 is a partially detailed view of the connecting portion 9 of the hume pipes 1 and 1 in FIG. A plurality of injection holes 13 are provided which communicate with an annular space 12 surrounded by 4. When the installation of a series of fume pipes into the IO mine is completed, a resin-based or cement-based water supply material is injected into the annular space from inside the pipe through the injection hole 13.
The pipe mouth area is completely sealed.

Figures 6 and 7 show the steel collar 5 of Figures 1 and 2.
This shows a modification of the Huyum tube that does not require
An annular groove 14 is carved on the distal end side of the convex hemispherical surface 2 at the front end, and an annular packing material 15 is provided in the annular groove 14 to abut and adhere closely to the concave hemispherical surface 3 at the rear end of the adjacent hume canal. is embedded.

Therefore, there is no need to sequentially fit the steel collars 5 for sealing onto each of the joints 9 of the fume pipe during installation, and construction efficiency is further improved.

The above embodiments and modifications can be applied even if the excavated pit is curved three-dimensionally, but if the pit is curved two-dimensionally, that is, within one plane, the method shown in FIG. Huyum's canal is applicable as shown.

As shown in FIGS. 8(a) and 8(b), the hume tube 21 has a front end with a radius ρ'(ri<ρ'<ro ) with a convex semi-cylindrical surface 22, and the same radius ρ° whose center axis is the vertical line C2 perpendicular to the tube axis at the rear end.
It is formed by a concave semi-cylindrical surface 23. Then, they are laid one after another in the excavated pit in a plan view similar to that shown in FIG. 6.

The above embodiments and modified examples include a hemispherical surface 2.3 and a semicylindrical surface 2.
2. The radius of curvature (ρ, ρ′) of 23 is
Since the inner radius is set to a value greater than or equal to ri and less than or equal to the outer radius rO, the contact area of the hume tube at the connecting portion 9 will not become narrow and damage will occur during press-fitting, and the connecting portion 9 will not be damaged at the time of press-fitting. without increasing the width of the step on the outer periphery.
It is more suitable for actual laying construction.

In the above embodiments and modifications, the radius of curvature of the hemispherical surface or semi-cylindrical surface was set to be equal to or less than the outer radius of the Huyum tube, but there is almost no problem in practical work even if the radius of curvature is made equal to or less than the length of the Huyme tube. Further, a hume pipe having convex ends and a hume pipe having concave ends can be connected alternately.Furthermore, the buried pipe for enclosure of the present invention can be applied to the above-mentioned embodiments and modifications. The present invention is not limited to the Hume tube, but may be an M tube or the like.

<Effects of the Invention> As is clear from the above description, the buried pipe for enclosure of the present invention has one end surface formed into a convex or concave surface with a certain curvature, and the other end surface formed with the above convex or concave surface. Since they are formed into concave or convex surfaces with approximately the same curvature, the convex surface of any pair of adjacent buried pipes fits into the concave surface of the other so that they can rotate relative to each other, so that they are connected in series, and the rear end is press-fitted and pushed. This makes it possible to move the underground pipes all at once smoothly along the perimeter of the excavated pit, and also increases the contact area between adjacent buried pipes, eliminating damage at the joints and improving the efficiency of laying underground pipes. greatly contribute to improvement.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing a modified example of the present invention, FIGS. 3 and 4 are schematic views showing an example of burial according to the present invention, and FIG. is a detailed view of the V section in Figure 2,
Fig. 6 is a sectional view showing a modification of the present invention, Fig. 7 is a detailed view of ~1 part of Fig. 6, Fig. 8 (a), (b), (c),
(d) is a plan view, side view, front view, and rear view of a modified example of the present invention, FIG. 9 is a schematic plan view showing a conventional humid pipe laying method, and FIG. 1O is a partial detail of FIG. 9. Figure, 11th
The figure is a cross-sectional view showing a conventional hume pipe connection part, and FIG. 12 is a view taken along the cross-■ arrow in FIG. 11. 1... Hum tube, 2... Convex hemispherical surface, 3... Concave hemispherical surface, 4... Rubber packing, 5... Steel collar,
IO...pit, 13...injection hole, 21...huum tube, 22...convex semi-cylindrical surface, 23...concave semi-cylindrical surface, ρ. ρ′...Radius of curvature, ro...Outer radius, ri...Inner radius.

Claims (3)

[Claims] (1) An underground pipe for curved roads, characterized in that one end surface is formed into a convex or concave surface with a constant curvature, and the other end surface is formed into a concave or convex surface with approximately the same curvature as the above-mentioned convex or concave surface. . (2) The buried pipe for a curved route according to claim 1, wherein the convex or concave surface is a hemispherical surface having a diameter that is greater than or equal to the inner diameter of the buried pipe for a curved route and less than or equal to the length of the pipe. Buried pipes for curved roads. (3) The buried pipe for curved roads according to claim 1, wherein the convex surface is a cylindrical surface having a diameter that is greater than or equal to the inner diameter of the buried pipe for curved roads and less than or equal to the length of the pipe. Buried pipe for curved roads.