JP4879627B2 - Steel shell concrete segment manufacturing method - Google Patents

Description

  The present invention relates to a method for manufacturing a steel shell concrete segment suitable for manufacturing a steel shell concrete segment used as a lining body of a cylindrical tunnel by filling a steel shell with concrete filling.

  When manufacturing the steel shell concrete segment, first, the main girder, the joint plate and the skin plate are used to form a steel shell having a concave portion for filling concrete, and then the concave portion of the steel shell is filled with concrete to make steel. Construct shell concrete segment.

  Various proposals have been made in the past regarding methods for filling concrete into the steel shell recesses from the viewpoint of the efficiency of filling concrete and the suppression of irregularities on the surface due to bubbles in the hardened concrete.

  This concrete filling method is roughly divided into two types. In the first method, the inner surface of the segment steel shell, that is, the opening surface of the recess is laid upward, concrete having a low slump value is placed in the recess from above, and the surface is finished with a trowel. In the second method, the steel shells for segments are arranged vertically, the opening surface of the concave portion of the steel shell is closed with the front mold to form a closed space in the steel shell, and the concrete that leads to this closed space This is a concrete injection method in which an injection hole and an exhaust hole are provided, and high-fluidity concrete is filled into the closed space from the injection hole while exhausting air in the closed space from the exhaust hole.

  However, in the second concrete pouring method, the steel shells for segments are arranged vertically, and the closed surface is formed by closing the opening surface of the recess with the front mold and exhausting the air inside. It was difficult to fill the concrete without gaps in every corner of the flat closed space. In addition, there is a problem that the injection mechanism for injecting concrete into the closed space from the concrete injection hole penetrating the front mold and the exhaust mechanism provided at the upper part of the steel shell are complicated. In addition, the air bubbles mixed in the concrete gather at the boundary surface between the concrete and the front mold, and after the concrete is hardened, the traces of the air bubbles appear on the surface of the concrete as fine irregularities.

Techniques for solving these problems have been proposed in, for example, Patent Document 1, Patent Document 2, Patent Document 3, and the like.

  The concrete filling method of Patent Document 1 is shown in FIG. As shown in FIG. 1, the segment steel shell 1 includes an upper main girder 5, a lower main girder 5 a, a skin plate 10, and a joint member 8. The segment steel shell 1 is supported so that the arc-shaped inner and outer surfaces thereof are positioned on the vertical plane (A), and the opening surface of the recess 2 on the inner surface side of the segment steel shell 1 is closed by the front mold 3. Thus, the space 28 is formed. Further, a concrete injection pipe 20 is connected to a concrete injection hole 20a opened at a substantially middle portion of the front mold 3 in the height direction, and high-fluidity concrete 4 is press-fitted into the space 28 from the concrete injection pipe 20. . Then, the liquid level 9 gradually rises and fills the inner surface 5b of the arcuate upper main girder 5 at the uppermost surface of the space 28, and the filling of the concrete 4 is completed. A concrete overflow pipe 6 is provided at the upper part of the front mold 3 in order to smoothly fill the concrete 4 up to the inner surface 5 a of the main girder 5. With the above configuration, there is also an advantage that concrete can be efficiently filled into the segment steel shell at low cost.

  Patent Document 2 discloses a pouring method in which segment steel shells are placed vertically and vertically, a closed space is formed on the opening surface of the recess by a front mold, and high-fluidity concrete is filled in the closed space. Has been. The feature of this patent document 2 is that a holding means for a cylinder that receives the pressure in the mold is provided in a concrete pumping pipe connected to the concrete injection hole of the front mold. This has the advantage that the finished concrete surface near the concrete inlet can be easily and reliably flattened.

In Patent Document 3, in the pouring method in which the steel shells for segments are placed vertically and vertically, and the opening surface of the recess is formed as a closed space with the front mold, and the closed space is filled with highly fluid concrete. Closed space air venting devices have been proposed. The feature of this patent document 3 is that an air vent pipe having a tip located at a position close to the upper wall surface is provided inside the segment steel shell, the air vent pipe is lowered from the one end position, and further bent. To the concrete injection hole formed in the front mold. Furthermore, a concrete press fitting pipe is connected to the concrete injection hole from the outside of the front mold. With the above configuration, the tip of the air vent pipe is located at the upper part in the closed space, and the air is reliably vented in the closed space when placing concrete, so that the concrete can be smoothly filled to every corner of the closed space. There is an advantage.
JP 2001-47420 A Japanese Patent Laid-Open No. 10-37463 Japanese Patent Laid-Open No. 10-37461

  An object of the present invention is to close a concave portion of a steel shell for a segment with a front formwork to form an internal space, and in a concrete injection method in which concrete is filled into this internal space, for exhausting air in the internal space when filling the concrete By improving the exhaust mechanism, preventing irregularities from being formed by air bubbles on the concrete surface after the concrete is hardened, and ensuring that the interior space can be filled without gaps and that it can be visually confirmed. is there.

  About said point, it is unsolved in patent documents 1-3. First, in patent documents 1-3, since the steel shell for segments is arranged vertically and concrete is poured in, the direction in which the concrete's own weight acts is the vertically downward direction. For this reason, since the filled concrete is filled in order from the bottom mainly by its own weight, the concrete is filled in a state where there are many small bubbles 7 as shown in FIG. 5 between the inner surface of the front mold. Become. When the front formwork is removed after the concrete is hardened, the traces of the bubbles are present as small irregularities on the concrete surface on the inner side of the segment, and the appearance is inferior. In Patent Documents 1 to 3, this problem has not been solved. Therefore, conventionally, an operation process for filling the uneven portion is necessary, and this has been one of the factors that increase the manufacturing cost.

  Further, in Patent Documents 1 to 3, the segment steel shell is installed vertically so that both the arc-shaped inner and outer surfaces are positioned on the vertical plane, so the upper end of the segment steel shell is the arc-shaped full length. Are at the same level. On the other hand, since concrete has fluidity and viscosity, the liquid level may not be uniform over the entire length only by its own weight. Because of these relationships, in the final stage of concrete filling, it is difficult to press the concrete uniformly over the entire length without any gaps on the uppermost surface in the same level of the closed space, and the space where the concrete fluidity is not filled. Is easily formed. Moreover, it cannot be visually confirmed whether concrete is filled to every corner in the closed space.

  Furthermore, when concrete is filled in the closed space, an exhaust mechanism for exhausting air in the closed space becomes complicated as in Patent Document 3. In Patent Document 3, an air vent pipe bent in the middle is attached to the front mold, and the air vent pipe is disposed in the closed space, but its piping structure is complicated. In addition, it is desirable to place the suction tip of the air vent pipe at the uppermost part of the closed space in order to fill the closed space with concrete without any gap. However, in Patent Document 3, the air vent pipe is suctioned due to the piping structure. It is difficult to position the tip at the top of the closed space.

  In order to provide an exhaust hole for exhausting the air in the closed space when filling the concrete with the uppermost part of the closed space, it is structurally simple to provide an exhaust hole in the upper main girder web of the segment steel shell. Another problem arises. That is, after the concrete is filled and cured, it is necessary to seal the exhaust hole in a watertight manner. In order to perform the watertight sealing most reliably and easily, a watertight bolt is preferably used. For this purpose, the exhaust hole needs to be a female screw hole. However, another problem arises there. That is, in the final filling stage, the concrete filling the closed space stops the filling of the concrete into the closed space by overflowing the exhaust hole, but if the exhaust hole is configured with a female screw hole, The overflowing concrete fills the screw groove of the female screw hole, and the watertight bolt cannot be screwed into the female screw hole later.

  The present invention solves the above-mentioned problems, and in the system in which the concave portion of the steel shell for the segment is closed with the front mold and the concrete is injected into the space formed thereby, the accumulation of air does not occur in the space as much as possible. Thus, it is possible to fill the concrete and to make the exhaust mechanism for the concrete as simple as possible and to make it possible to visually confirm the filling of the concrete.

  In order to solve the above-described problems, the inventor closes the concrete filling recess formed on the front side surface of the vertically disposed segment steel shell with the front mold and integrates both members by temporary fixing. A space is formed inside the segment steel shell, and the space is filled with concrete from an injection hole penetrating the front mold, and a threaded hole for exhaust is formed on the upper portion of the segment steel shell. At the time of filling, an exhaust member made of an exhaust bolt or an exhaust plug is fitted into the threaded hole, and after concrete is hardened, a watertight bolt is screwed into the threaded hole after the exhaust member is detached. Invented a concrete-filled steel shell structure.

  That is, the first invention is to stand the steel shell for the segment tilted from the vertical surface, and close the concrete filling recess formed on the front side surface with a mold in which a through hole is formed in advance, The outer circumferential surface of the cylindrical member is screwed into a threaded hole formed in advance at the upper end of the segment steel shell, and the mold is closed to close the space formed inside the segment steel shell. The concrete is injected through the through hole of the mold, the injection of the concrete is stopped according to the overflow situation from the cylindrical member, and the cylindrical member is fixed after the concrete injected into the space is cured. The threaded hole is screwed off, and a watertight bolt is screwed into the threaded hole from which the cylindrical member is screwed off to seal it.

  In addition, according to a second aspect, in the first aspect, after the concrete injection is stopped, the gap from the injected concrete to the threaded hole is filled with mortar.

  Further, according to a third invention, in the first or second invention, a bulging wet rubber or a watertight washer is interposed between the watertight bolt and the segment steel shell.

  Moreover, 4th invention inject | pours the said concrete in the 1st-3rd invention, attracting | sucking the air in the said space through the exhaust pipe connected to the cylindrical member.

  Moreover, 5th invention sets up the steel shell for segments in the 1st-4th invention with the inclination angle of 20 degrees or less from a perpendicular surface.

  According to the present invention, in a concrete-filled steel shell structure in which a segment steel shell recess is closed with a front mold and the space formed thereby is filled with concrete, a threaded hole is formed in the segment steel shell located at the top of the space. An exhaust member comprising an exhaust bolt or an exhaust plug was attached to the threaded hole when filling the concrete, and a watertight bolt was screwed into the threaded hole after the concrete was cured. With the above configuration, an exhaust mechanism necessary for filling concrete can be simply configured. That is, when concrete is filled, exhaust bolts or exhaust plugs are screwed into the threaded holes, so when concrete overflows from the exhaust bolts or exhaust plug exhaust holes to the space at the final stage of filling the space with concrete. The thread groove of the threaded hole is not filled with concrete, and the watertight bolt can be securely fastened to the threaded hole. In addition, by tightening this watertight bolt to the threaded hole, the threaded hole can be sealed in a watertight manner, and water does not enter the interface between the steel shell for the segment and the filling concrete from this threaded hole, and quality is improved for a long time. Can be secured.

  According to the present invention, the threaded hole for screwing the exhaust bolt or the exhaust plug can be formed at the top of the internal space. Therefore, when the concrete filled in the internal space overflows from the exhaust holes of the exhaust bolts or the exhaust plugs, the concrete has spread over the corners of the internal space located at a level below the exhaust holes. As a result, the concave portion of the steel shell for the segment can be filled with concrete without any gap, and a high-quality steel shell concrete segment can be manufactured. Moreover, the concrete filling state can be confirmed by observing the overflow of the concrete from the exhaust bolt or the exhaust hole of the exhaust plug located at the shortest place with respect to the liquid level of the concrete filled in the internal space. This eliminates misidentification of the concrete filling state, and also in this respect, it is possible to produce a high-quality steel shell concrete segment.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic explanatory view for explaining a method of producing a steel shell concrete segment using the concrete-filled steel shell structure of the present invention, and FIG. 1 (a) is a perspective view of a completed state of the steel shell concrete segment. FIG.1 (b) is sectional explanatory drawing at the time of concrete filling at the time of cut | disconnecting by the AA cross section of Fig.1 (a).

  1A and 1B, an arc-shaped steel shell concrete segment 11 is composed of a segment steel shell 1 and concrete 4 filled in the recess 2 thereof. The segment steel shell 1 is composed of an upper main girder 5 and a lower main girder 5a, joint members 8 on both the left and right sides, and a skin plate 10, and a concave portion 2 for filling concrete is formed inside curved in an arc shape. ing. Further, the upper main girder 5 and the lower main girder 5a, the left and right joint members 8, the skin plate 10 and the front mold 3 are closed by closing the opening surface of the concave portion 2 of the segment steel shell 1 with the front mold 3. Thus, an internal space to be described later is formed in the recess 2. The front mold 3 is temporarily fixed to the segment steel shell 1 in a detachable manner, and a known technique is used as the fixing means.

  Further, the segment steel shells 1 are arranged vertically as shown in FIG. 1 and arranged such that the upper side is inclined forward by a predetermined angle from the vertical plane. The inclination angle θ of the segment steel shell 1 is preferably 10 ° ≦ 20 °. By inclining in this way, as shown in FIG. 1A, the upper end portion 12 of the center portion of the segment becomes the apex portion with respect to the left and right sides of the segment member. In the upper end portion 12, a threaded hole 23 for an exhaust hole is provided in the web 21 of the upper main beam 5. Thereby, the position of the threaded hole 23 is located at the top portion in the internal space 28 formed in the segment steel shell 1. Therefore, when the concrete 4 filling the internal space 28 overflows from the threaded hole 23 in the final filling stage, the concrete 4 is filled to every corner in the internal space 28. It should be noted that one or a plurality of threaded holes 23 are preferably provided in the upper end portion 12 at the center of the segment.

  Further, by holding the upper portion of the segment steel shell 1 forwardly inclined, when the concrete 4 is filled in the internal space 28, the weight of the concrete 4 acts on the inner surface of the inclined front mold 3. As a result, the concrete 4 comes into pressure contact with the inner surface of the front mold 3, so that bubbles existing at the boundary surface between the concrete 4 and the front mold 3 are efficiently expelled upward. When the concrete 4 is hardened and the front mold 3 is removed, the concrete surface 4a has irregularities in the traces of bubbles, but as described above, by holding the upper part of the segment steel shell 1 forwardly inclined, In addition, unevenness generated as traces of bubbles on the concrete surface 4a can be reduced, and a clean surface can be finished.

  A concrete injection hole 20a penetrating the front mold 3 is formed at a substantially middle portion of the front mold 3 in the height direction, and a concrete injection pipe 20 is connected to the concrete injection hole 20a. Then, the highly fluid concrete 4 is press-filled into the internal space 28 from the concrete injection pipe 20. Along with the filling of the concrete 4, the air in the internal space 28 is exhausted to the outside from the threaded hole 23 that is an exhaust hole. Then, the liquid level 9 of the concrete 4 gradually rises, and in the final stage, as shown in FIG. 1 (b), the small space 28a formed immediately below the threaded hole 23 is filled with mortar 27, After the concrete 4 and the mortar 27 are cured, the threaded hole 23 is sealed in a watertight manner.

  A high frequency vibrator 13 is installed on the front mold 3 as means for generating vibrations in the segment steel shell 1 and the front mold 3. The high-frequency vibrator 13 is operated from the start of press-fitting concrete into the internal space 28 until the end of press-fitting.

  Further, as an example of means for holding the segment steel shell 1 and the upper side of the front mold 3 tilted forward, a rubber or other elastic support 15 is installed on the ground 14, and one end of the elastic support 15 is attached to the elastic support 15. The tip of the inclined base frame 16 attached to the ground 14 is supported. That is, by placing the segment steel shell 1 and the lower end portion 17 of the front mold 3 on two inclined base frames 16 having different arrangement angles when viewed in plan, the segment steel shell 1 and the front mold are placed. The frame 3 can be held tilted forward. In addition, you may support by well-known support means other than the elastic support body 15. FIG.

  In the construction process described above, the present invention is characterized by an exhaust member that is mounted in the threaded hole 23 during concrete filling and a watertight bolt that seals the threaded hole 23 in a watertight manner after the concrete has hardened. This will be described with reference to FIGS.

  As described with reference to FIG. 1, the threaded hole 23 is provided in the web 21 at the central upper end portion 12 of the upper main beam 5 of the segment steel shell 1 arranged vertically. 2 to 4, the threaded hole 23 is located on the inclined upper side of the web 21 in the segment steel shell 1 with the upper side inclined forward, that is, on the left side in FIG. 2. It is provided at a location close to the flange 22. By comprising in this way, the threaded hole 23 will be located in the top part of the upper side of the inclined steel shell 1 for segments. Therefore, when the concrete 4 is filled up to the site of the threaded hole 23, the concrete 4 is filled in the internal space 28 at a level below this position without a gap.

  FIG. 2A shows a mode in which the threaded hole 23 is provided. FIG. 2B shows an aspect in which the exhaust bolt 24 is screwed into the threaded hole 23. The exhaust bolt 24 has an exhaust hole 31 penetrating the center of the shaft as shown in an enlarged view in FIG. The exhaust bolt is not limited to the form shown in FIG. 3A, and may be replaced with any cylindrical member having an outer peripheral surface that can be screwed into the threaded hole 23.

  Next, as shown in FIG. 2 (c), by injecting the high-fluidity concrete 4 into the internal space 28 in the form in which the exhaust bolt 24 is screwed into the threaded hole 23, the liquid level 9 is Ascending gradually as shown by dotted and solid lines. In the final stage of concrete filling, as shown in FIG. 2C, the concrete 4 overflows from the internal space 28, overflows through the exhaust hole 31 of the exhaust bolt 24, and overflows to the upper surface of the web 21 of the upper main girder 5. Thereby, it can be confirmed visually that the internal space 28 is filled with the concrete 4. Further, after confirming the overflow of the concrete 4, the injection of the concrete 4 into the internal space 28 is stopped. When the concrete 4 overflows to the outside through the exhaust holes 31, the exhaust bolts 24 are screwed into the threaded holes 23, so that the thread grooves of the threaded holes 23 are not filled with the concrete 4.

  Further, instead of the exhaust bolt 24, as shown in FIG. 3B, an exhaust plug 24a made of rubber or an elastic resin and having an exhaust hole 31 may be used. The shaft portion of the exhaust plug 24a may be tightly screwed into the threaded hole 23 using the elasticity of the material. Also with this configuration, when the concrete 4 overflows to the outside through the exhaust hole 31 of the exhaust plug 24a, it is possible to prevent the concrete 4 from filling the screw groove of the threaded hole 23. Become.

  FIG. 2D shows a state where the concrete 4 filled in the internal space 28 is hardened. At this time, the exhaust bolt 24 is unscrewed from the threaded hole 23. At this time, a small space 28 a that is not filled with the concrete 4 may be formed in the vicinity immediately below the threaded hole 23. This is because, in the final stage of concrete filling, when the concrete 4 overflows from the exhaust hole 31 of the exhaust bolt 24, the small space 28a is at a slightly higher level than the portion of the exhaust hole 31. Further, as another factor that the small space 28a is formed in the vicinity immediately below the threaded hole 23, the volume of the concrete 4 decreases due to evaporation of moisture contained in the concrete 4 when the concrete 4 is hardened. It can also be mentioned.

  Therefore, as shown in FIG. 2 (e), the small space 28a is filled with the mortar 27 through the threaded hole 23 to completely eliminate the void in the internal space 28. After the mortar 27 has hardened, finally, as shown in FIG. 2 (f), the watertight bolt 25 is screwed into the threaded hole 23 to complete the filling process of the concrete 4 into the internal space 28. Incidentally, the step shown in FIG. 2 (e) may be omitted.

  Further, as shown in FIG. 3 (c), an annular blister wet rubber 29 is attached to the surface of the top of the watertight bolt 25 that contacts the web 21 of the upper main girder 5, thereby screwing the screw. Watertight sealing of the cut hole 23 is ensured. In addition, even if a watertight washer 30 is attached to the surface of the upper main girder 5 on the lower surface of the head of the watertight bolt 25 as shown in FIG. 23 can be water-tightly sealed.

  As described above, when the watertight bolt 25 is fastened to the threaded hole 23, the ring-shaped blister wet rubber 29 or the watertight washer 30 is brought into close contact with the periphery of the threaded hole 23 and expands with moisture, thereby threading. The hole 23 is sealed in a watertight manner. As a result, water does not enter the boundary surface between the inner surface of the segment steel shell 1 and the concrete 4, and the quality of the steel shell concrete segment is ensured for a long period of time.

  Further, an exhaust pipe 26 may be connected to the exhaust hole 31 of the exhaust bolt 24 as shown in FIG. For example, the outer periphery of the exhaust pipe 26 may be fixed to the inner peripheral surface of the exhaust hole 31 with an adhesive as shown in the figure. In addition, an exhaust pump (not shown) is connected to the other end of the exhaust pipe 26. In this way, while injecting concrete into the internal space 28, the air in the internal space 28 is forcibly exhausted to a negative pressure by the exhaust pipe 26, thereby filling the internal space 28 more smoothly. Can be done. The suction of the air in the internal space 28 by the exhaust pipe 26 may not always be performed. For example, when suction is performed when the injection pipe of the high-fluidity concrete 4 is clogged, the concrete becomes better.

  As described above, according to the present embodiment, the upper main girder 5 of the segment steel shell 1 arranged vertically is provided with the screw hole 23 for the exhaust hole, and the exhaust bolt 24 or the exhaust gas is provided in the screw hole 23. When the plug 4 is attached and the concrete 4 can be filled while exhausting the air in the internal space 28 and the concrete 4 overflows from the exhaust hole 31 such as the exhaust bolt 24, The trouble that the screw groove is filled with the concrete 4 can be eliminated. Therefore, after the concrete 4 is hardened, the watertight bolt 24 can be easily and reliably screwed into the threaded hole 23, and water can be reliably prevented from entering the boundary surface between the inside of the segment steel shell 1 and the concrete 4. .

  Further, according to the present embodiment, the concrete space 4 is filled with the concrete 4 while vibrating the segment steel shell 1 whose front side is inclined forward and the front mold 3, and after the concrete 4 is hardened, the front mold By demolding 3, a high-quality steel shell concrete segment 11 with less unevenness is produced on the concrete surface 4 a as shown in FIG. Furthermore, at the time of concrete filling, if the concrete overflow state from the exhaust hole 31 of the exhaust bolt 24 in the upper end part 12 of the center part of the segment steel shell 1 is visually monitored, the concrete 4 is put in the entire internal space 28. Can be confirmed without gaps, which is more useful in terms of quality control.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram for demonstrating the manufacturing method of the steel shell concrete segment of this invention, (a) is a perspective view of a segment completion state, (b) is the concrete filling cut | disconnected by AA of Fig.1 (a) It is sectional drawing at the time. (A)-(f) is an expanded sectional view which shows the attachment or detachment process of the exhaust plug and watertight bolt to the threaded hole at the time of concrete filling to the internal space of the steel shell for segments, and after filling. (A) (b) is each expanded sectional view of an exhaust volt | bolt and an exhaust plug, (c) (d) is a sectional side view which shows two examples of a watertight bolt. (A) is an expanded sectional view which shows the aspect which connects an exhaust pipe to an exhaust volt | bolt, and fills interior space with concrete, (b) is the C section detail drawing of the same figure (a). It is a schematic diagram for demonstrating the manufacturing method of the conventional steel shell concrete segment, (a) is a perspective view of a segment completion state, (b) is the time of concrete filling cut | disconnected by BB of Fig.5 (a) FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel shell for segments 2 Recessed part 3 Front formwork 4 Concrete 4a Hardened concrete surface 5 Upper main girder 5a Lower main girder 5b Inner side surface of upper main girder 6 Concrete overflow pipe 7 Air bubbles 8 Joint member 9 Liquid level 10 Skin plate 12 Central upper end portion 13 High frequency vibrator 14 Ground 15 Elastic support 16 Inclined base frame 17 Lower end portion 18 Base end 19 Both ends 20 Concrete injection pipe 20a Concrete injection hole 21 Web 22 Flange 23 Threaded hole 24 Exhaust bolt 24a Exhaust Plug 25 Watertight bolt 26 Exhaust hose 27 Mortar 28 Internal space 28a Small space 29 Annular bulging wet rubber 30 Watertight washer 31 Exhaust hole

Claims (5)

The steel shell for the segment is set up by being inclined from the vertical plane, and the concrete filling recess formed on the front side surface thereof is closed with a mold in which a through hole is formed in advance.
The outer peripheral surface of the cylindrical member is screwed into a threaded hole formed in advance on the upper end of the segment steel shell,
For the space formed inside the steel shell for the segment by closing the mold, the concrete is injected through the through hole of the mold,
Stop the pouring of the concrete according to the overflow situation from the cylindrical member,
After the concrete poured into the space is hardened, the cylindrical member is unscrewed from the threaded hole,
A method for producing a steel shell concrete segment, wherein a watertight bolt is screwed into a threaded hole from which the cylindrical member has been screwed off to seal it. The method for producing a steel shell concrete segment according to claim 1, wherein after the injection of the concrete is stopped, mortar is filled in a gap from the injected concrete to the threaded hole. The method for producing a steel shell concrete segment according to claim 1 or 2, wherein a water-bulging wet rubber or a water-tight washer is interposed between the water-tight bolt and the segment steel shell. The method for producing a steel shell concrete segment according to any one of claims 1 to 3, wherein the concrete is injected while sucking air in the space through an exhaust pipe connected to the cylindrical member. . The method of manufacturing a steel shell concrete segment according to any one of claims 1 to 4, wherein the segment steel shell is erected at an inclination angle of 20 ° or less from a vertical plane.

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