WO2004001191A1

WO2004001191A1 - Segment

Info

Publication number: WO2004001191A1
Application number: PCT/JP2003/007758
Authority: WO
Inventors: Hiroshi Awa
Original assignee: Kfc Ltd.; Imoto, Atsushi
Priority date: 2002-06-21
Filing date: 2003-06-19
Publication date: 2003-12-31
Also published as: AU2003244272A8; AU2003244272A1

Abstract

A segment for connecting segments to each other by press-fitting a male fitting projectedly fixed to the connected end face of the other segment into the open hollow part of a female fitting buried in the connected end face of one segment, wherein a bolt support part formed on the opposite side of the opening part of the female fitting integrally with the female fitting and an anchor member fitted to the bolt support part and projected to the opposite side of the opening part are buried in a segment body, and also an insert member formed so that the male fitting can be fitted thereto and having a connection means for connecting the male fitting to the segment body is buried in the segment body, and the male fitting is connected to the insert member to mount the male fitting into the segment.

Description

Specification

Segment

Technical field

The present invention relates to a segment provided with a joint for joining segments to one another with one touch, and more particularly to a concrete segment (segment piece) used when constructing a tunnel by a shield method.

Background art

In the shield method, excavation is performed while excavating while preventing earth and sand on the front of the tunnel with the outer shell (shield), and at the same time, the outer shell is extruded forward, and in parallel with this, the segments are assembled into a ring shape behind the outer shell, The tunnel inner wall (lining) is formed by successively building segments in the tunnel axial direction. To push out the outer shell: · There is a large force of several hundred to several thousand tons, but the segment receives the reaction force and jacks out the outer shell.

Figure 36 is a partially cutaway perspective view of the shield tunnel under construction, where 1 is the shield machine, 1a is the outer shell made of cylindrical steel, 1b is the cutter head of the excavator, 2 is the segment ring, 2a is a segment and 3 is a shield jack. At the head of the tunnel under construction, a shield machine 1 is located, and the shield machine has a cylindrical outer shell 1a. At the front of the outer shell 1a, there is provided a power head 1b for excavating the ground, and at the inner rear part of the outer shell 1a, a plurality of shield jacks 3 are mounted. Each jack is selectively attached to the front end of the segment so that a reaction force can be obtained. An erector (not shown) for assembling a segment is provided in the rear space 4 in the outer shell 1a so as to receive the segment 2a from a transport device (not shown), hold the segment 2a, and rotate and position the segment 2a. I have. A tunnel consisting of a segment ring 2 is constructed and formed behind the shield shell 1a in a cylindrical shape. The shield tunnel connects the arc-shaped segments 2 a in the circumferential direction to form a segment ring 2, and the segment ring 2 is formed in the tunnel axial direction with the excavation of the shield machine 1. It is constructed by adding to the already built segment ring.

That is, an arc-shaped segment (segment piece) 2a having a predetermined width is ringed. A single segment ring 2 is formed, and a new segment ring is added in the direction of travel of the already built segment ring in the tunnel traveling direction each time the shield moat advances one ring. To build a segment. Therefore, the outer shell la of the shield machine advances at the front end of the latest segment ring in search of a reaction force, and as much as shield machine 1 advances, a tunnel consisting of the segment ring is built behind it. To go.

Segment 2a is made of a material such as concrete segment, steel segment, and steel concrete composite segment. When a concrete segment is used as a segment, in order to fasten adjacent segments to each other, a box-shaped depression called a port box and a port hole for joining are provided in the segment, and the port is used by using these. Segment joints for fastening were common (Japanese Patent Application Laid-Open No. 10-153095). However, port fastening has a problem that the work is troublesome, so recently, in order to mechanize the assembly of the segment, a new segment was pressed against the already built segment, and the jack of shield machine 1 was jacked. There is known a joining method using a one-touch type inter-segment joint that can be fastened by a propulsion reaction force using the method 3 (see Patent No. 3213814).

FIGS. 37 and 38 are enlarged cross-sectional views of a conventional one-touch segment joint. FIG. 37 shows a state before joining, and FIG. 38 shows a state after joining. ₂ a _1, 2 a 2 is a segment constituting the adjacent segment entry ring. In this conventional one-touch fitting, a metal fitting 5 protrudes and is fixed to one segment 2 ai side of a segment to be joined, and a female metal fitting 6 and a recess 7 are formed on the other segment 2 a ₂ side. mounting a form embedded in the concrete 8 segments 2 a ₂ to, those for fastening the hardware 5, 6 of the male and female in the pushing force by the machine. In other words, the male metal part 5 and the female metal part 6 are buried on the surfaces to be joined of the segments 2 a ^ 2 a ₂ adjacent to each other in the tunnel axis direction, and the inner diameter of the female metal part 6 is slightly smaller than the outer diameter of the male metal part 5. The male hardware 5 is pushed into the female hardware 6 by using the power of the jack 3 of the shield machine 1 and the segment 2 a! Newly Tatekomu joining segments 2 a ₂ in.

When the male metal part 5 and the female metal part 6 of this ring joint are engaged, a slight shift occurs in both positions and the direction of the axis, but the polyethylene foam 10 absorbs the shift. You. For this reason, the two are correctly tightened without destroying the concrete of the segment. In addition, since the outer surface of the male hardware 5 is coated with powder, it fits smoothly with the joining surface of the female hardware 6, and the two closely adhere. And, even if friction occurs due to crimping of the male and female hardware, the corrosion resistance of the metal surface is ensured. The cap 11 is a jig for adjusting the height h of the concrete 8 entering the hollow portion 7 of the female hardware 6 so that the height h becomes a predetermined value. It is a gasket for water stoppage provided in a strip on the contact surface.

Fig. 39 is a cross-sectional view showing the male hardware 5 and female hardware 6 attached to the formwork 30 using jigs 20 and 25 during segment manufacturing, respectively. Fig. 40 is mounting the female hardware 6 to the moldwork 30. FIG. 4 is a partially enlarged view showing a state in which it is folded.

By placing a concrete CNC into the concrete placement space 29 in the installation state shown in Fig. 39, segments can be manufactured. That is, in order to manufacture a segment having the above joint structure, as shown in FIG. 39, a predetermined number of male hardware 5 is provided on one end face of the mold 30 in the tunnel axial direction, and the same number of female hardware 6 is provided on the other. Is set in such a manner that the position of the male hardware and that of the female hardware and the direction of the axis coincide with each other. At this time, the positioning port 26 of the positioning / fixing jig 25 is screwed into the tip of the male metal member 5 via the nut 27 and the cap 28 and set on the formwork 30. A nut 21 is fixed to the head of the cap 11 of the female hardware 6 by welding, and the positioning port 22 of the positioning / fixing jig 20 is fixed to the nut 21 via the nut 23 and the holding plate 24. And set it on the formwork 30. As described above, with the male hardware 5 and the female hardware 6 set in the formwork 30, a concrete CNC is cast into the concrete casting space 29 of the formwork 30 as shown by the arrow in FIG. Can be manufactured.

-problem

① First problem

The conventional segment is defined as male hardware 5 when the male hardware is pushed into the female hardware, or when the entire segment is displaced thereafter (the entire lining consisting of the segments is displaced during construction of the shield tunnel). There is a problem that stress concentrates on the buried ends A to D of the female hardware 6 (Fig. 38) and damages the concrete forming the segments. Also, in the conventional segment, the buried ends of the male and female hardware 5, 6 are formed by expanding the diameter. By filling the concrete with segment concretes 8 and 9, the male and female hardware are fixed to the respective segments. For this reason, there is a drawback that it is not suitable for thin segments. This is because if the cover (distance from the concrete end face) is not sufficient, the concrete will crack. Further, when manufacturing the conventional segment, a special cement filling jig 20 is required to fill the interior of the female hardware 6 with concrete as shown in FIG. Similarly, a special cement filling jig 25 is required to fill the interior of the male hardware 5 with the concrete. This jig is also used for positioning and fixing the hardware 5 and 6 to the formwork, but it is necessary to tightly fill concrete in the metalwork 5 and 6 in the segment manufacturing process where concrete is poured into the formwork. . However, dense filling requires extremely high manufacturing techniques, such as the quality of fresh concrete and how to apply the pipes all night long, making it difficult to maintain quality.

② Second problem

FIG. 41 is an enlarged perspective view of a conventional segment. In the conventional segment 2a, the male hardware 5 projects from the joint end face, and the segments are transported and stored in this projected state. However, if the metal parts 5 are transported or stored in a protruding state, there is a risk that the metal parts 5 or the segment concrete in which they are buried may be damaged by collision or snagging, etc. There was a problem that space was required as much as possible.

③ Third problem

Conventionally, the fittings in the segments are filled with a predetermined amount of filler material, preferably concrete 8, 9 (see Fig. 37 and Fig. 38). For the length h, the male hardware 5 is completely filled with no gaps, and the joint hardware is anchored to the segment concrete and the strength is secured.

In order to fill the interior of the female part 6 with a filler, preferably concrete 8 (see FIGS. 37 and 38), the female part 6 is formed using a special filling jig 20 (FIGS. 39 and 40). So that concrete can enter this part during segment production. However, the concrete in the segment is of low grade, low-grade It is extremely difficult to tightly fill concrete 8 in a concave part.

—On the other hand, it is more difficult to fill concrete 9 inside male hardware 5. For this reason, separately from the concrete casting process into the formwork 30, as shown in (1) of Fig. 42, the mortar MTL is put in advance in the male hardware 5, and the mortar is packed with the port 5a. Then, as shown in (2), the mortar MTL is hardened to leave the porto 5a as it is to produce a mortar-containing male hardware, which is set in a mold 30 to produce a segment.

As described above, the female hardware requires a special filling jig (including the cap 11), and also has a problem that it is difficult to securely and tightly fill the inside of the cap with a concrete. In the case of male hardware, there is a problem that a complicated manufacturing process is required separately from the process of placing concrete in the formwork 30. As described above, if fitting fittings can be attached to segments while tightly filling inside this kind of fittings without the need for special filling jigs and manufacturing processes, manufacturing labor will be reduced and quality will be reduced. Maintenance is also easy.

An object of the present invention is to avoid local stress concentration on the concrete of the segment, to be applicable regardless of the thickness of the segment, and to stably maintain the quality of the segment. It is to be.

Another object of the present invention is to avoid the risk of damage to hardware and segments without impairing the merits of joining segments, which can be joined with one touch using the mechanical force of a shield machine, In addition, it is necessary to save space.

Another object of the present invention is to simplify the structure of the filling jig and to simplify the manufacturing process without requiring a complicated manufacturing process. Disclosure of the invention

According to a first aspect of the present invention, a male metal piece protruding and fixed to an end face to be joined of another segment is pushed into an opening hollow portion of a female metal piece embedded in an end face to be joined of a segment, A segment provided with a segment joint for joining the metal fittings together with a bolt supporting part integrally provided with the metal fitting on the side opposite to the opening of the metal fitting, and protruding from the port supporting part on the side opposite to the opening. Attach the anchor member and The support portion and the anchor member are respectively embedded in the segment main body, and the female hardware is fixed thereto.

According to this segment, a sufficient anchoring force of the female hardware to the segment body is secured by the anchor member, so that an enlarged diameter portion is not required at the buried end of the female hardware as a joint hardware, so that the local portion of the segment is provided. No concrete stress concentration occurs and concrete is not damaged. In addition, since the metal part does not require an enlarged diameter part, it can be applied to a thin segment. Also, since the fitting is not specially shaped, and the pipe-shaped member and the threaded member are integrated by, for example, friction welding, it is easy to manufacture the fitting. Also, unlike the conventional one-touch type segment joint, the anchor can be fixed by the anchor port or anchor member buried in the concrete without filling the concrete that constitutes the segment inside the female hardware. Therefore, there is no possibility that the concrete unfilled portion remains inside the segment due to the structure of the female hardware, and quality maintenance is easy.

According to a second aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece embedded in an end face of another segment to be joined, and the segments are joined together. A metal member is mounted on the segment main body, and an insert member provided with a connecting means for connecting the male metal member is buried in the segment main body, and the connecting member is connected to the male metal member. A segment is formed by providing a connecting portion for connecting means. According to this segment, the male hardware does not protrude from the segment joint end surface during transportation or storage, and it is possible to eliminate the possibility that the male hardware is damaged during transportation or storage, or that the concrete segment is damaged. In addition, the space required for transportation or storage can be omitted because the protrusion is eliminated.

According to a third aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece buried in an end face of another segment to be joined. Male and female hardware whose both ends function as male hardware can be attached to the segment main body, and a female metal hardware into which the male and female hardware is pushed is buried in the segment main body to form a segment. I do. According to this segment, the male hardware does not protrude from the segment joint end face during transportation or storage, and It is possible to eliminate the possibility that the object is damaged during transportation or storage, or the concrete segment is damaged, and the space required for transportation or storage can be saved because the protrusion is eliminated.

According to a fourth aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece embedded in an end face of another segment to be joined, and the segments are joined together. Is a segment that joins. The male hardware according to the fourth aspect includes a cylindrical hollow member having one end opened and pushed into the cylindrical hollow portion of the female hardware, and a bottom lid that closes the opening. A screw portion for connecting a jig for fixing the jig is provided on the bottom lid portion, so that the jig can freely pass through the hollow member on the side opposite to the bottom portion, and the inside of the hollow member is filled. A through hole for injecting a material is provided, a part of the hollow member is embedded in the segment body, and then a filling member is filled from the through hole. According to this segment, a special jig required for manufacturing the segment can be simplified. In addition, there is no need to introduce casting concrete into male and female hardware during the casting of segmented concrete, simplifying production and ensuring the quality of filling by ensuring that fillers can be filled in the hardware. Becomes easier.

According to a fifth aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece embedded in an end face of another segment to be joined, and the segments are joined together. Is a segment that joins. The male hardware according to the fifth aspect includes a cylindrical hollow exterior member having one end opened, a filling member housed in the cylindrical hollow portion of the exterior member, and a part of an anchor fixed to the base side of the filling member. A protrusion is provided at the leading end of the filling member, and a screw is provided at the protrusion to connect a jig for fixing a male metal member to a mold when manufacturing the segment. A through hole is formed to penetrate and protrude the projection, and the filling member is housed in the exterior member such that the projection of the filling member fits into the through hole of the exterior member. According to this segment, the filler is not injected into the hardware inside the segmented concrete, but can be filled by a simple method without being buried in the segment concrete.

According to a sixth aspect of the present invention, a male metal piece protruding and fixed to an end face to be joined of a segment is pushed into an opening hollow portion of a female metal piece embedded in an end face to be joined of another segment. Is a segment that joins segments together. The male metal part according to the sixth aspect is a cylindrical hollow member having one end opened and pushed into the cylindrical hollow part of the female metal part, a support part integrally provided so as to close the opening part of the cylindrical hollow member, It has a filling member filled in the hollow portion of the cylindrical hollow member, a plurality of blades attached outward to the support portion, and an anchor extending in the support portion in the axial direction. A screw section for connecting a jig for fixing the male hardware is provided at the tip of the male hardware. According to this segment, the male hardware and the female hardware can be firmly embedded in the segment by the anchor portion including the anchor line and the blade.

According to a seventh aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece buried in an end face of another segment to be joined, and the segments are joined together. Is a segment that joins. The female hardware according to the seventh aspect includes a cylindrical portion into which the male metal is pushed, a bottom cover portion or a part of an anchor provided integrally with the cylindrical portion so as to close one open end of the cylindrical portion. A screw is provided on the bottom lid or a part of the anchor to connect a jig for fixing the female hardware to the mold during manufacturing. According to this segment, a special jig required for manufacturing the segment can be simplified. In addition, it is not necessary to introduce cast concrete into male and female hardware during the casting of segmented concrete, simplifying the manufacturing process, and ensuring that the filler can be reliably filled into the hardware, facilitating quality maintenance. Becomes

According to an eighth aspect of the present invention, a male metal piece protruding and fixed to an end face of a segment to be joined is pushed into an opening hollow portion of a female metal piece embedded in an end face of another segment to be joined, and the segments are joined together. Is a segment that joins. The female metal part according to the eighth aspect includes a cylindrical part into which the male metal part is pushed, a support part that closes one open end of the cylindrical part, a plurality of blades attached to the support part outwardly, The support includes an anchor extending in the axial direction. According to this segment, the male and female hardware can be buried firmly in the segment by the anchor portion composed of the anchor line and the blade. BRIEF DESCRIPTION OF THE FIGURES FIG. 1 is an explanatory view of a segment joining method of a first embodiment having a one-touch type joint structure.

FIG. 2 is a sectional view of the segment of the first embodiment.

Figure 3 is an enlarged view of the male hardware.

Figure 4 is an enlarged view of the female hardware.

FIG. 5 is an explanatory diagram of a segment manufacturing method.

Fig. 6 is a set diagram showing the male and female hardware set on the positioning jig.

FIG. 7 is an explanatory view when the reinforcing bar for segment concrete arranged inside the formwork and the port for anchor are connected by a reinforcing bar connecting jig.

FIG. 8 shows a modification of the first embodiment.

FIG. 9 is an explanatory diagram of the second embodiment.

FIG. 10 shows a modification of the second embodiment.

FIG. 11 is an explanatory view of a segment joining method of a third embodiment having a one-touch type joint structure.

FIG. 12 is a sectional view of a segment of the third embodiment.

FIG. 13 is an enlarged perspective view of the male hardware of the third embodiment.

FIG. 14 is an enlarged sectional view of the male hardware.

FIG. 15 is a view on arrow AA of FIG.

FIG. 16 is an explanatory diagram of a method for manufacturing a segment having a joint structure according to the third embodiment. Fig. 17 is a set diagram when the male and female hardware is set on the positioning and fixing jig.

Figure 18 is an illustration of the required number of inserts and female hardware in the segment.

FIG. 19 shows a modification of the third embodiment.

FIG. 20 shows another modification of the third embodiment.

FIG. 21 shows another modification of the third embodiment.

FIG. 22 shows another modification of the third embodiment.

FIG. 23 shows another modification of the third embodiment. FIG. 24 is an explanatory diagram of a segment joining method according to the fourth embodiment.

FIG. 25 is a segment sectional view of the fourth embodiment.

FIG. 26 is an explanatory diagram of a segment manufacturing method according to the fourth embodiment.

Fig. 27 is a set state diagram when male and female hardware are set on the positioning / fixing jig.

Fig. 28 is an explanatory view of the setting state of the male hardware in the jig and the filling material injection.

FIG. 29 is an explanatory view of the setting state of the female hardware in the jig and the filling material injection.

FIG. 30 is a sectional view of a segment of the fifth embodiment.

FIG. 31 is an explanatory view of a method of manufacturing a female hardware.

FIG. 32 is an illustration of a method of manufacturing a male hardware.

FIG. 33 is an explanatory view of the setting state of the male hardware in the jig and the filling material injection.

FIG. 34 is an explanatory view of the setting state of the female hardware in the jig and the filling material injection.

FIG. 35 is a sectional view of the segment of the sixth embodiment.

Figure 36 is a partially cutaway perspective view of the shield tunnel under construction.

FIG. 37 is an enlarged cross-sectional view (before joining) of a conventional one touch type segment joint. Fig. 38 is an enlarged cross-sectional view (after joining) of the conventional one-touch switch type segment joint. FIG. 39 is a cross-sectional view showing a state where the male hardware and the female hardware are respectively attached to the formwork.

FIG. 40 is a partially enlarged view showing a state where the female hardware is attached to a mold.

FIG. 41 is an enlarged perspective view of a conventional segment.

Fig. 42 is an explanatory view of the production of the male hardware with mortar. BEST MODE FOR CARRYING OUT THE INVENTION

(A) First embodiment

FIG. 1 is an explanatory view of a segment joining method of a first embodiment having a one-touch joint structure, and FIG. 2 is a sectional view of a segment of the first embodiment.

As shown in Fig. 1, joints are formed on the _four sides (joint surfaces) 3: 314 of each segment 2 _ai , 2a _{2 in} the tunnel axial direction and the tunnel circumferential direction. A well-known quick joint is provided at the joint of the segments adjacent in the circumferential direction. However, illustration and description are omitted because they have no relation to the present invention. One-touch type joints are used for the joints of the segments 2 _ai and 2 a ₂ adjacent in the direction of the tunnel axis. That is, segments 2 _ai, 2a ₂ of the joint surface 31 31 ₂ into a plurality is provided with the joint portion of the one-touch (three pairs in the figure), one Keru you to the joint portion of the segment 2a male portion 32-32 ₃ both joined by crimping fastened to the female part to 33 ₃ at the joint portion of the other segment 2a _2.

Each of the segments (segment pieces) 2 _ai , 2a ₂ has an arc-shaped concrete segment body 35 curved in a direction intersecting the paper surface in FIG. 2, and one of the segment bodies 35 in the tunnel axial direction. joint surface ₃₁₂ to Yubu 32丄to 32 ₃ of the other joint surface 3: the female portion 33 to 33 ₃ are formed. In other words, the male portion 32 of the three I～32 ₃ and the three female portion .33 to 33 ₃ are provided in the illustrated example is in the tunnel axis direction end surfaces of segmenting bets 1 pc. Male fittings 32 that make up the male units 32 to 32 ₃ are provided in a form obtained by projecting the other half embedded in con click REITs constituting a main body portion 35 of the half segments of such shown in FIG. 2 . Moreover, female fittings 33 constituting the female part 33 I～33 ₃ was set embedded Porto support part side from the joint surface 3 h of the segment in the concrete forming the main body portion 35 of the segment in the form obtained by projecting a predetermined length fraction It is provided in the form.

As shown in the enlarged view of Fig. 3, the male hardware 32 has (1) a main body part 32a formed hollow by a metal pipe member and two screw parts SCR1 and SCR2 formed in series on the shaft core part. The metal port support portion 32b is integrated with the metal port by friction welding, and the anchor port 32c is screwed onto the large-diameter first screw portion SCR 1 and the hollow portion of the main body portion 32a is connected. It is composed of 32 d filled with filler such as concrete or mortar. The total length of the main body 32a and the port support 32b is L2, and the anchor port 32c has a length protruding from the end of the main body 32a by a predetermined length. The length of this protrusion can be adjusted by changing the anchor port. The diameter D2 of the main body 32a is, for example, 45, and is slightly larger than the inner diameter of the female hardware as described later. The small-diameter second screw portion SCR2 of the port support portion 32b is used as a jig mounting screw.When manufacturing a segment, the jig port is screwed into the second screw portion SCR2 as described later. Metal mold for segment production Position and fix to the frame.

As shown in the enlarged view of FIG. 4, the female hardware 33 is a port having a main body 33a formed of a metal pipe member and two screw portions SCR1 and SCR2 formed in series on a shaft core portion. The support portion 33b and the support portion 33b are integrated by friction welding, and have a hollow portion 33c opened on one side. A polyethylene foam 33d is provided on the outer periphery of the main body 33a, and when a slight shift occurs in both positions and the direction of the axis when engaging with the male hardware of the adjacent segment in the tunnel axis direction, the shift occurs. A predetermined thickness (5 mm in the example) so that the metal hardware can be absorbed and the buffering function can be achieved when the female hardware into which the male hardware is pushed is slightly expanded in the radial direction. It is installed around. The polyethylene foam 33d does not seep into the concrete cast during segment production.

A predetermined length anchor port 33e is screwed into the large-diameter first screw portion SCR1 of the port support portion 33b and integrated therewith. As long as only the screw portion can be screwed with the first screw portion SCR1 of the female metal, the portion protruding from the porto support portion 33b of the anchor port 33e does not necessarily have to be formed with a screw over its entire length. Alternatively, it may have a deformed rebar shape. The fixing strength can be arbitrarily and sufficiently increased by increasing the length of the anchor bolt 33e. The small diameter second screw portion SCR2 of the port support portion 33b is used as a jig mounting screw and reaches the hollow portion 33c. At the time of segment production, as described later, the port of the jig is screwed into the second screw portion SCR2 from the opening side of the female hardware, thereby positioning and fixing the female hardware to the segment manufacturing formwork.

The total length of the main body portion 33a and the port support portion 33b is LI (<L2), and the anchor port 33e projects a predetermined length from the end of the bolt support portion 33b. The protrusion length can be changed by changing the anchor port, thereby adjusting the fixing force. Further, the inner diameter (diameter of the hollow portion) D2 of the main body 33a is, for example, Ψ44, which is slightly smaller than the outer diameter Φ45 of the male hardware. Therefore, when the segment is built, if the male hardware of the new segment 2 _ai is pushed into the female hardware of the already built segment 2a ₂ , the male metal will expand the female metal, and The metal is fixed by the frictional force, so that the segments 2a or 2a ₂ are joined and integrated. You.

In order to manufacture the segment having the above joint structure, as shown in FIG. 5, a predetermined number of male hardware 32 is provided on one end face of the form 41 in the tunnel axial direction, and the same number of female hardware 33 is provided on the other side of the mold 41. Set so that the position of the female hardware and the direction of the axis are matched. At this time, as shown in FIG. 6, the positioning port 51 of the positioning / fixing jig 50 is screwed into the second port portion SCR2 of the male metal part 32 via the nut 52 and the cap 53, and is set in the formwork 41. To Further, the positioning port 61 of the positioning / fixing jig 60 is screwed into the second port portion SCR2 of the female hardware 33 via the nut 62 and the holding plate 63, and is set on the formwork 41. As described above, the male hardware 32 and the female hardware 33 can be accurately and easily positioned and set on the mold 41.

The cap 53 of the positioning / fixing jig 50 functions to protect the protrusions and to position the male hardware. That is, in order to manufacture the segment so that the non-buried portion of the male hardware 32 protrudes from the end face of the segment by a predetermined length, a resin cap 53 is provided to prevent the male hardware from being damaged during manufacturing and transportation. Over the metal hardware 32 to protect it. It is preferable that the interior of the male hardware 32 is filled with concrete or mortar. Therefore, the interior of the pipe-shaped main body 32a of the male hardware 32 is filled with concrete or mortar in advance. Place the items in form 41.

With all male hardware 32 and all female hardware 33 attached to the formwork 41, concrete is poured into the concrete casting space 42 of the formwork 41 as shown by the arrow in FIG.

In the segment of the present invention manufactured as described above, the male hardware 32 and the female hardware 33 are fixed to concrete with a frictional force corresponding to the length of the anchor use ports 32c and 33e. For this reason, it is possible to perform the segment joining using the one-touch coupling without causing local stress in the concrete constituting the segment at the time of the segment joining or after the segment joining. In other words, the polyethylene foam 33d provided around the pipe-shaped main body of the female hardware 33 properly absorbs the deviation of the axial center from the male hardware 32, and is deepened from the end face of the segment by the anchor use ports 32c, 33e. Since it is in a firmly fixed state at the position, the segments can be accurately joined together just by mechanically pushing it in with the shield jack.In the above, the jig 60 was used at the time of segment production, that is, Positioning porto 61, Although the female hardware 33 is positioned and mounted on the mold 41 using the nut 62 and the holding plate 63, accurate positioning can be achieved by using the anchor port 33e. That is, as shown in FIG. 7, the reinforcing steel reinforcement 65 for the segment concrete and the anchoring port 33e, which are arranged inside the formwork, are connected with the reinforcing bar connecting jig 66. By doing so, it is possible to perform more accurate positioning (including adjusting the direction of the axis). In addition, by connecting the reinforcing bar 65 and the anchor port 33e with the reinforcing bar connecting jig 66, a positioning and fixing jig is not necessarily used, and the segment assembling process can be simplified. it can.

Is when Tatekomu the segments formed as described above in the shield tunnel, the male part of a new segment 2 _ai the female part (the female fittings) 33 like an anchor already segments 2a ₂ as shown in FIG. 2 (male The two are fastened in such a way that the metal fittings 32 are pushed in using the pushing force of the shield jack. At this time, since the inner diameter D1 of the female hardware 33 is slightly smaller than the outer shape D2 of the male hardware 33, the insertion of the male hardware 33 reliably and firmly joins the adjacent segments between adjacent segments. can do.

• Modifications

In the first embodiment, the port metal support 32b of the male hardware 32 and the anchor port 32c are separately configured, and the port support 33b of the female metal 33 and the anchor port 33e are separately configured. It can also be configured integrally.

FIG. 8 is a modification of the first embodiment, and the same parts as those in the first embodiment of FIG. 2 are denoted by the same reference numerals. The difference from the first embodiment is that, in the male hardware (male part) 32 and the female hardware (female part) 33, the bolt support part and the anchor port are integrated to form anchor parts 32e and 33f. The point is that it is fixed to the main body parts 32a and 33a by friction welding or the like.

Since the anchor portions 32e and 33f of the modified example cannot be removed, the fixing strength cannot be increased by adjusting the port length as in the first embodiment. This eliminates the need for screwing work.

(B) Second embodiment

FIG. 9 is an explanatory diagram of the second embodiment. In the second embodiment, the same female hardware 33 is embedded in both end faces 31 ι and 3 12 of the segments 2 _ai and 2 a ₂ to be joined (in the tunnel axial direction) to form a segment. The female hardware 33 of the second embodiment has the same configuration as the female hardware of the first embodiment, and the segments are manufactured by the same method.

Junction between segments, prepared Oyu hardware 80 is a metal mass of rod-like, is performed by inserting the Oyukin was 80 segments 2ai, the female fittings 33, 33 to be joined of 2a _2. The external shape of the male and female hardware 80 has a shape protruding from the segment end surface of the male and female hardware 32 of the first embodiment at both ends.

According to the segment of the second embodiment, the segment main body and the male and female hardware are made separately, and the male and female hardware is attached to the segment main body at the time of joining, so that the metal comes from the segment joint end face during transportation or storage. There is no longer any risk of metal parts being damaged during transportation or storage, or concrete segments being damaged. In addition, since there is no protrusion, the space required for transportation or storage can be omitted. In addition, according to the segment of the second embodiment, male and female hardware can be easily attached on site, and the segment joining operation can be performed with one touch using the mechanical force of the shield machine. The workability can be improved.

• Modifications

FIG. 10 shows a modification of the second embodiment, in which an annular water-stop material (gasket or water-swelling rubber) 81 is provided near the center of the male and female hardware 80 in the length direction.

At the time of joining segments 2 _ai and 2 a ₂ , one end of male and male hardware 80 should be pressed into opening 33 c of female hardware 33 of one segment 2 _ai to form a male part, and male and male hardware 80 should be joined. The segments 2a ₂ are pressed into the open hollow portions 33c of the female hardware 33 to join the segments together. The male and female hardware 80 of the modification has an annular water-stop material 81 made of gasket or water-expandable rubber wound around the center in the longitudinal direction. Water can be prevented from entering the hollow part of the hardware.

(C) Third embodiment

FIG. 11 is an explanatory view of a segment joining method of a third embodiment having a one-touch joint structure, and FIG. 12 is a sectional view of a segment of the third embodiment. As shown in Fig. 11, joints are formed on the _four side surfaces (joint surfaces) 3h to 314 of each segment 2a i, 2a _{2 in} the tunnel axial direction and the tunnel circumferential direction. One-touch type joints are used for the joints of the segments 2 _ai and 2 a ₂ adjacent in the tunnel axis direction. That is, the segments 2a L, joint surfaces of 2a _2, 31 ₂ and the joint portion of the one-touch is provided a plurality of (in FIG. 3 sets), the male portion 132 to 132 ₃ in the joint portion of one of the segments 2 _ai both by crimping fastened to the female part ISS i~133 ₃ at the joint portion of the other segment 2a ₂ is bonded.

Each of the segments (segment pieces) 2 _ai , 2a ₂ has an arc-shaped concrete segment body 135 curved in a direction intersecting with the paper surface in FIG. 12, and one of the joints of the segment body 135 in the tunnel axis direction. surface 31 ₂ Yubu 132 i LSS s is the other joint surface 3 female part 133-133 ₃ are formed. That is, the male portion 132 to 132 ₃ of three and the three female part to 133 ₃ are provided in the illustrated example is in the tunnel axis direction end faces of 1 Ke segment.

Male part 132 ~: 132 _3, and a possible male fittings 132b attached to the insert portion 132a and the insert portion embedded in the concrete forming the body portion 135 of the segment as shown in FIG. 12. The insert part 132a includes an insert body part 132a-l and a wedge-shaped anchor part 132a-2. The body part 132a-l is formed with a female screw 132a-3 for connecting the male hardware 132b. The male screw formed on the male hardware 132b is screwed to the screw.

The male hardware 132b has a shape as shown in the enlarged perspective view of FIG. 13 and the enlarged sectional view of FIG. That is, powder coating is applied to the outer surface on the distal end side of the cap portion 132b-l.A chamfered portion 132b-2 is formed at a predetermined position on the base side of the cap portion, and the base end side of the chamfered portion is further supported. Section 132b-3 is provided. The support portion 132b-3 is provided with a male screw 132b-4 that is screwed with the screw 132a-3 of the insert portion 132a. A filler 132b-5 is filled in the cap 132b-1 through an upper hole.

In order to connect the male hardware 132b to the insert part 132a, as shown in the AA arrow view of FIG. By rotating the metal fittings 132b, the male hardware 132b can be easily connected to the insert 132a. That is, the insert part 132a is embedded at a predetermined depth position of the hole formed in the segment, and the support part 1321) -3 of the male metal part 132b is embedded in the insert hole, and the male part 132b is inserted into the insert part 132a. It is fixed to the segment body 135 by connecting with screws. As for the screw, either the insert part 132a or the male hardware 132b may be a male screw and either may be a female screw.

Further, Conch female fittings 133, forming a way, the segment body portion 135 of the anchor one side from the joint surface 3 h of the segment in the form obtained by projecting a predetermined length amount shown in FIG. 12 of the female portion 33 to 33 ₃ It is provided in a form buried in the REIT.

The female hardware 133 is formed by integrating a main body portion 133a formed by a metal pipe member and a wedge-shaped anchor portion 133b having a threaded portion formed on a shaft core portion by friction welding, and one of the openings is opened. It has a configuration having a hollow portion 133c. A polyethylene foam 133d is provided around the outer periphery of the main body 133a, and when a slight displacement occurs in both positions and the direction of the axis when engaging with the male hardware of the adjacent segment in the tunnel axis direction, the displacement is eliminated. It is provided with a predetermined thickness so as to be able to absorb it and to have a buffering function when the female hardware 133 into which the male hardware 132b is pressed is deformed in a slightly bulging shape. .

The screw 133e of the anchor support portion 133b is used as a screw for attaching a jig and reaches the hollow portion 133c. At the time of manufacturing the segment, the metal fitting is positioned and fixed to the segment manufacturing form by screwing the port of the jig into the screw 133e from the opening side of the metal fitting as described later.

To manufacture a segment having the above joint structure, as shown in FIG. 16, a predetermined number of male insert portions 132a are provided on one end face of the formwork 41 in the tunnel axial direction, and the same number of female hardware 133 are provided on the other side. Is set in such a manner that the position of the insert part and the position of the female hardware and the direction of the axis are matched. At this time, as shown in Fig. 17, the positioning port 5 of the positioning / fixing jig 50 'is screwed into the female screw 132a-3 of the insert part 132a via the holding plate 52' to form the frame. Set to 41. Also, the positioning port 6 of the positioning Z fixing jig 60 ′ is screwed into the screw 133 e of the female hardware 133 via the holding plate 62 ′ and set on the formwork 41. As described above, the insert part 132a and the female hardware 133 can be accurately and easily positioned and set on the mold 41. With all the inserts 132a and all the female hardware 133 attached to the formwork 41, a concrete CNC is cast into the concrete casting space 42 of the formwork 41 as shown by the arrow in Fig. 16 to obtain Fig. 18. As shown, the required number of insert portions 132a and the segment body 135 in which the female hardware 133 are embedded are completed.

In the segment of the third embodiment manufactured as described above, the insert part 132a and the female hardware 133 are fixed to concrete with the frictional force of the anchor parts 132a-2 and 133b. For this reason, the segment joining by one-touch type joint is performed without causing local stress on the concrete constituting the segment at the time of segment joining after connecting the male hardware 132b to the insert portion 132a or after the segment joining. I can do it. In other words, the polyethylene foam 133d provided around the pipe-shaped main body of the female hardware 133 properly absorbs the misalignment of the axial center with the male hardware 132, while the anchor portions 132a-2, 133b make it deep from the segment end face. Since the position is firmly fixed at the position, the segments can be accurately joined to each other simply by mechanically pushing with a shield jack.

When the segment formed as described above is installed in the shield tunnel, as shown in Fig. 12, the male hardware 132b is connected to the insert 132a of the newly built segment 2 _ai with a screw. Thereafter, the like an anchor already female portion of the segment 2a ₂ (female material) 133, a male fittings 132b of new segments 2 _ai, concluded both in the form of pressed using a force Push the sheet one Rudojakki To go. At this time, since the inner diameter of the female hardware 133 is formed slightly smaller than the outer shape of the male hardware 132b, the insertion of the male hardware 132b allows the adjacent segments to be surely and firmly joined and integrated. According to the segment of the third embodiment, the segment main body and the male hardware are made separately, and the male hardware is attached to the segment main body at the time of joining, so that the male hardware protrudes from the segment joint end face during transportation or storage. There is no longer any risk that the male hardware will be damaged during transportation or storage, or that the concrete segment will be damaged. In addition, since there is no protrusion, the space required for transportation or storage can be omitted. Further, according to the segment of the third embodiment, the male hardware can be easily attached on site by the male hardware connecting means (for example, screws) provided on the insert member. Can be performed with one touch using the mechanical power of the shield machine. Coming, so workability can be improved.

, Modifications

As a modified example of the third embodiment, as shown in FIG. 19, one in which the end face of the insert part 132a is arranged at the joint end face of the segment may be used.

As another modified example, as shown in FIG. 20, the anchor portions 132a-2 and 133b may be formed of deformed reinforcing bars instead of wedges, and threaded portions may be formed at the ends thereof.

As another modified example, as shown in FIG. 21, the anchor portions 132a-2 and 133b may have an appropriate shape that is easy to process, and as shown in FIG. The tip side may be shaped to enter the base 132b-5 of the male hardware 132b.

As another modification, as shown in FIG. 23, the female hardware 133 has the same configuration as the female hardware 33 of the first embodiment, and the male hardware 132b is screwed into the insert portion 132a provided in the segment, and the male hardware 132b is inserted. Secure to part 132a. That is, the segment 2ai, 2a to the first joining end face 3 of the ₂ buried first embodiment similarly to the female fittings 133, constitute a segment embedded the insert portion 132 a to the second joining end face 31 _2. A screw portion is formed in the insert portion 132a, and the screw portion of the male hardware 132b is screwed into the screw portion. For joining between the segments, prepare a bar-shaped male hardware 132b with a threaded portion formed at the end, and connect the threaded portion of this male hardware 132b to the threaded portion of the insert portion 132a of the segment 2ai to be newly connected. And screw it on. Thereafter, write-free insert into the female fittings 133 of the segment 2a ₂ to be joined to the male fittings 132b attached to the segment 2ai.

(D) Fourth embodiment

The fourth embodiment is a segment using male metal parts and female metal parts whose ends embedded on the segment concrete are closed with a bottom lid.

FIG. 24 is an explanatory diagram of a segment joining method according to a fourth embodiment having a one-touch type joint structure, and FIG. 25 is a sectional view of a segment according to the fourth embodiment.

As shown in FIG. 24, joints are formed on _four side surfaces (joint surfaces) to 314 of each of the segments 2 _ai and 2a _{2 in} the tunnel axial direction and the tunnel circumferential direction. Of these, a well-known quick joint is installed at the joint of the segments adjacent in the circumferential direction. Be killed. One-touch switches are used for the joints of the segments 2 _ai and 2 a ₂ adjacent in the tunnel axis direction. That is, the segments 2a L, (in FIG. 3 sets) more to the joint surface 31 i, 31 ₂ of 2a ₂ is provided with a joint portion of the one-touch, the male fittings 232 i in the joint portion of one of the segments 2 _ai both joined by crimping engagement (when subjected to 233 there Ru) female fittings 233-233 ₃ in ～232 ₃ (232 sometimes subjecting) the joint portion of the segment 2a ₂ of the other side.

Each of the segments (segment pieces) 2a i, 2a ₂ has an arc-shaped concrete segment body 235 curved in a direction intersecting with the paper surface in FIG. 25, and one joint of the segment body 235 in the tunnel axial direction. surface 31 ₂ Okanamono 232-232 _3, the other joint surface 3;! the female hardware 233-233 ₃ are formed. In other words, the male portion 232 to 232 ₃ of three and the three female portions 233 i ~ 233 ₃ are provided in the illustrated example is in the tunnel axis direction end surfaces of the segments 1 pc.

As shown in FIG. 25, the male hardware 232 has a main body (hollow member) 232a formed hollow by a metal pipe member, and one end of the main body has a round head shape and a predetermined diameter. A through hole 232b (see FIG. 28 (B)) is formed. The other end is enlarged in a trumpet shape, and a dish-shaped bottom cover 232c is attached to the body so as to close the enlarged end. On the inner surface side of the bottom cover (the side located in the hollow part of the main body), a screw portion (nut) 232 d for connecting a jig for fixing a male metal to the formwork at the time of segment production is provided at the axis thereof. Is welded in such a manner as to match the through hole 232b. The hollow portion of the main body 232a is filled with a filling member 232e from the through hole 232b after being embedded in the segment main body. The female metal part 233 has a main body part 233a formed in a hollow shape by a metal pipe member and having an enlarged diameter at one end, and a dish-shaped bottom lid 233b integrally attached so as to cover the enlarged diameter end. A screw (nut) 233c that connects a jig for fixing the female metal parts to the formwork during segment production is welded to the inner surface side of the bottom lid 233b. A polyethylene foam 233d is provided on the outer periphery of the main body 233a, and when a slight shift occurs in both positions and the direction of the axis when engaging with the male hardware of the adjacent segment in the tunnel axis direction, the shift is caused. It is provided with a predetermined thickness so that it can be absorbed, and also has a buffering function when the metal hardware 233 into which the male metal hardware 232 is pushed is deformed in a slightly bulging shape. I have. In order to manufacture a segment having the above joint structure, as shown in FIG. 26, a predetermined number of male hardware 232 is provided on one end face of the formwork 41 in the tunnel axial direction, and the same number of female hardware 233 is provided on the other end. Set it so that the position of the hardware and the direction of the axis coincide. At this time, as shown in FIG. 27 and FIG. 28 (A), the male metal part 232 is covered with the projection protection / positioning cap 83, which is fitted into a hole formed at a predetermined position of the segment form 41. The positioning port 81 is passed through the through hole of the nut 82 and the cap 83 through the through hole of the male hardware 232, screwed into the nut 232 d of the male hardware 232, and positioned and fixed to the formwork 41. I do.

Also, as shown in FIGS. 27 and 29 (A), the positioning port 71 of the positioning and fixing jig 70 is screwed into the screw 233c of the female metal part 233 via the nut 72 and the holding plate 73 to form a mold. Set it in frame 41. As described above, the male hardware 232 and the female hardware 233 can be accurately and easily positioned and set on the mold 41.

With all the male hardware 232 and all the female hardware 233 attached to the formwork 41, a concrete CNC is cast into the concrete casting space 42 of the formwork 41 as indicated by the arrow in FIG. When the mold is hardened, the positioning port 81 and the nut 232d are disconnected, and the jig 80 is removed from the mold 41. Similarly, the positioning port 71 and the nut 233c are uncoupled, and the jig 70 is removed from the mold 41.

Next, as shown in FIG. 28 (B), a filler 232e such as mortar or resin is injected into the male metal through the through hole 232b after removing the port 81. This makes it possible to easily fill the inside of the male hardware 232 with the filling material without any gap. Also, as shown in FIG. 29 (B), if the filler is injected to the predetermined height of the female hardware 233 as necessary, it is not necessary to introduce the concrete for the segment into the female hardware, and the concrete for the predetermined length can be provided. Only the packing material can be densely packed. Injection of the filler into the female hardware 233 is mainly for securing the anchoring strength of the female hardware to the segment concrete.Therefore, a sufficient anchoring strength is secured by the configuration of the enlarged diameter portion and the bottom cover 233b. In such cases, it is possible to omit the filling.

Is when Tatekomu the segments formed as described above the shield tunnel, the new Tatekomu female fittings 233 of the segment 2a ₂ male fittings 322 like an anchor previously segments 2a, as shown in Figure 25, the shield jacks Push using the pushing force And conclude the two. At this time, since the inner diameter of the female hardware 233 is formed slightly smaller than the outer shape of the male hardware 232, the insertion of the male hardware 232 makes it possible to securely and firmly join and integrate the adjacent segments.

According to the segment of the fourth embodiment, a special jig required for manufacturing the segment can be simplified. In addition, there is no need to introduce cast concrete into male and female hardware during the casting of segmented concrete, which simplifies manufacturing and facilitates quality maintenance.

(E) Fifth embodiment

The fifth embodiment is a segment using a female hardware and a male hardware having an anchor portion. FIG. 30 is a cross-sectional view of a segment of the fifth embodiment. The structure, manufacturing method, and joining method are the same as those of the fourth embodiment of FIG. 25 except that the structures of the female and male hardware are different. FIG. 31 and FIG. 32 are illustrations of a method of manufacturing a female hardware and a male hardware.

As shown in FIGS. 30 and 32, the male hardware 232 is composed of a filling member 232g with an anchor portion 232f formed in a flared shape, and an exterior part 232h covering the filling member. The filling member 232g is provided with a protrusion 232i, and the protrusion is provided with a female screw 232j. When the filling member 232g is formed of metal, resin, or the like, a threaded portion can be directly formed.However, when the filling member is formed of a concrete or the like, a plug having an internal thread is used. It may be embedded in the protrusion to form a screw portion. On the other hand, the exterior part 232h is a metal crown of a predetermined thickness having a round head at one end and a hollow shape having an open end at the other end, and the round head part is formed with a protrusion 232i of the filling member. A through hole 232k is provided. Also, a small hole 232m for resin injection is formed through the exterior part 232h. When used as a male hardware, as shown in (1) and (2) in Fig. 32, the filling member 232g is covered with the exterior part 232h, and an adhesive is injected through the resin injection hole 232m, and the filling member and the exterior Units are integrated.

By using the male hardware 232, as shown in FIG. 33, it is possible to easily position and fix the mold 41 using the jig 80 as in the fourth embodiment. That is, the male metal fitting 232 is covered with the projection protection / positioning cap 83, which is fitted into a hole formed at a predetermined position of the segment formwork 41, and the positioning port 81 is inserted through the washer 82 and the cap 83 through hole. Through the through hole of the male hardware 232, the female of the male hardware 232 The male hardware 232 can be positioned and fixed to the formwork 41 by screwing it into the screw portion 232j. In addition, since the male hardware 232 has an anchoring function, it can be buried firmly only by placing concrete in the concrete placing space in the formwork while being set in the formwork 41, and the accuracy is improved. High segment can be manufactured. Further, the male hardware of the second embodiment does not need to introduce or inject a filler into the male hardware at the time of manufacturing the segment as in the first embodiment.

As shown in (1) and (2) in Fig. 31, the female metal part 233 forms a threaded part 233g on the anchor part 233f formed to expand the skirt, and this is integrated with the pipe-shaped member 233h by friction welding. . Then, after integrating the pipe-shaped member and a part of the anchor, a polyethylene foam 233i is provided around the circumference of the pipe-shaped member 233h.

Since this female metal part 233 is provided with a screw part 233g for connecting the positioning port, it can be positioned and set on the mold 41 as shown in FIG. 34 using the jig 70 as in the fourth embodiment. In addition, since the female hardware 233 has an anchoring function, it can be buried firmly by merely casting concrete in the casting space in the form while being set in the form 41, and There is no need to introduce or inject a filler into the slab, and a highly accurate segment can be manufactured.

According to the fifth embodiment, in addition to the effect of the fourth embodiment, the injection of the filler into the metal is not performed in a state of being buried in the segment concrete, but can be performed by a separate means, so that it is ensured by a simple method. Filling is possible.

(F) Sixth embodiment

The sixth embodiment is a segment using a male hardware and a female hardware having an anchor portion.Especially, in the embodiment, both the anchor bar for securing the embedding depth and the blade for securing the embedding diameter are provided. It has.

FIG. 35 is a cross-sectional view of a segment of the sixth embodiment. The structure, manufacturing method, and joining method are the same as those of the fourth embodiment of FIG. 25 except that the structures of the female and male hardware are different. The male metal part 232 of the sixth embodiment has a main part 232p filled with mortar MLT, a support part 232q provided integrally with the main part, and a support part extending in the axial direction from the main part. Anchor bars 232r made of deformed reinforcing bars, etc., and vanes 232S made of several steel rods that protrude radially in the support section Have been. The male metal piece 232 is provided with a screw portion 232t at the protruding end thereof, and a positioning port is attached thereto to position and fix the male metal piece 232 to the mold. Therefore, the male hardware 232 has a sufficient fixing strength to the segment and a sufficient strength to prevent the male metal from buckling at the time of joining the segments due to the mortar MLT filled in advance inside the metal hardware. There is no need to introduce or inject filler into the furnace.

The female hardware 233 has a structure in which the pipe-like member 233p and the support portion 233q are integrated by friction welding, and the support portion 233q has an anchor portion 233r and a blade 233s similar to the male hardware. Is provided. Therefore, this anchor 233 has sufficient anchoring strength to the segment concrete due to the part of the anchor.Therefore, it is not necessary to introduce or inject a filler into the anchor, and a highly accurate segment can be manufactured. Becomes possible.

According to the sixth embodiment, it is not necessary to inject a filler into the metal, and the male and female hardware can be firmly embedded in the segment by a part of the anchor including the anchor streaks and the blades.

• Effects of the present invention

As described above, according to the segment of the first embodiment, the anchor member secures a sufficient fixing force of the female hardware to the segment main body, so that the buried end portion of the female hardware as the joint hardware does not require an enlarged diameter portion. There is no local stress concentration on the segments and concrete is not damaged. Also, since there is no enlarged diameter part in the metal, it can be applied to those with thin segments. Also, the fitting hardware is not specially shaped, and the pipe-shaped member and the threaded member are integrated by, for example, friction welding, so that it is easy to manufacture the fitting hardware. Also, unlike conventional one-touch type segment joints, anchors can be fixed by the anchor port-anchor members buried in the concrete without filling the female components with concrete that constitutes the segments. Due to the structure of the female hardware, there is no possibility that unfilled concrete remains inside the segment, and quality maintenance is easy.

According to the segment of the first embodiment, a screw portion is formed at least at an end of the anchor member, and a female screw portion to be screwed with the screw portion is formed in the porto support portion. Since the screw portion formed on the anchor member is screwed into the female screw portion to attach the anchor member to the port support portion, the anchor member can be attached to the port support portion by a simple operation of merely screwing.

Further, according to the segment of the first embodiment, since the second female screw portion for mounting the jig is formed in series with the female screw portion on the port support portion, the positioning port is directly connected to the second screw portion. The female hardware can be attached to the mold with a simple operation of screwing in.

Further, according to the segment of the first embodiment, the connecting member is used to connect the reinforcing bar reinforced in the segment and the anchor member, so that the positioning jig is necessarily used. This is no longer necessary, and the formwork assembling process during segment production can be simplified.

Further, according to the segment of the first embodiment, since the anchor member of the female metal part and the port support portion are integrally formed with the same material, the anchor attaching operation at the time of manufacturing the segment can be omitted.

According to the segment of the second embodiment, male and female hardware whose both ends function as male hardware are provided so as to be attachable to the segment main body, and a female hardware into which the male and male hardware is pushed is embedded in the segment main body. Since the segment is formed by the segment, the metal does not protrude from the segment joint end surface during transportation or storage, and there is no possibility that the metal is damaged during transportation or storage, or the concrete segment is damaged. In addition, the space required for transportation or storage can be omitted because the protrusion is eliminated.

Further, according to the segment of the second embodiment, the male and female hardware is pushed into the opening hollow portion of the female hardware of one segment, and the male and female hardware is pushed into the opening hollow portion of the female hardware of the other segment to be joined. The male and female hardware can be easily attached on site simply by joining the segments together, and the segment joining work can be performed with one touch by using the mechanical power of the shield machine. Can be improved. Further, according to the segment of the second embodiment, since the annular waterproof material is provided near the center in the length direction of the male and female hardware, after the segments are joined by the waterproof material, water infiltrates into the hollow portion of the female hardware. Can be prevented.

According to the segment of the third embodiment, an insert part is provided so that a male hardware can be attached to the segment body, and a connecting means for connecting the male hardware is provided on the segment body. Since the material is buried and a connecting part for connecting to the connecting means is provided on the male hardware, the segment is configured, so that the male hardware does not protrude from the segment joining end surface during transportation or storage, and the male metal is transported or stored. There is no longer any risk of breakage or damage to the concrete segment. In addition, the space required for transportation or storage can be saved because the protrusion is eliminated.

Further, according to the segment of the third embodiment, the male hardware can be easily attached on site by the male hardware connecting means (for example, screws) provided on the insert member. Workability can be improved because it can be performed with one touch using the mechanical power of the shield machine.

According to the segments of the fourth and fifth embodiments, special jigs required for manufacturing the segments can be simplified.

Further, according to the segments of the fourth and fifth embodiments, it is not necessary to introduce cast concrete into the male and female hardware at the time of placing the segment concrete. The quality can be easily maintained because the inside can be filled with filler.

In addition, according to the segments of the fourth and fifth embodiments, the injection of the filler into the hardware is not performed while being buried in the segment concrete, but can be performed by a separate means. Become.

According to the segment of the sixth embodiment, the male metal part and the female metal part can be firmly embedded in the segment by the part of the anchor including the anchor streaks and the blades.

Claims

The scope of the claims

1. In the opening of the metal fitting buried in the end face to be joined of the segment, push the male fitting that is projected and fixed to the joining end face of the other segment into the hollow part of the female fitting to join the segments.

A port support portion provided integrally with the metal fitting on the side opposite to the opening of the metal fitting, and an anchor member attached to the port support and protruding to the opposite side to the opening, respectively. A segment characterized by being embedded in the segment body.

2. A screw portion is formed at least at an end of the anchor member, and a female screw portion to be screwed with the screw portion is formed on the porto support portion,

Screwing the screw portion formed on the anchor member into the female screw portion, and attaching the anchor member to the porto support portion,

The segment according to claim 1, wherein:

3. A second female screw portion for attaching a jig to the hollow portion is formed in the porto support portion in series with the female screw portion.

The segment according to claim 1, wherein:

4. Reinforcing reinforcing bars embedded in the segments,

2. The segment according to claim 1, further comprising: a connecting member for connecting the reinforcing bar for the segment and the anchor member.

5. The segment according to claim 1, wherein the porto support portion of the female hardware and the anchor member are integrally formed of the same material.

6. Push the male hardware protruding and fixed to the end face of the segment to be joined into the open hollow part of the female hardware embedded in the end face of the other segment to be joined.

Provided so that male hardware can be attached to the segment body,

Embedded in the segment body is an insert member provided with a connecting means for connecting the male hardware,

A connecting portion for connecting to the connecting means was provided on the male hardware,

A segment characterized by that:

7.Attach an anchor member to the insert member and segment the anchor member. 7. The segment according to claim 6, wherein the segment is embedded in a main body.

8. The connecting means and the connecting portion are screws, and a male metal member is provided with an engaging portion of a screw fastening tool,

7. The segment according to claim 6, wherein:

9. Push the male hardware that protrudes and is fixed to the end face of the segment to be joined into the opening hollow part of the female hardware embedded in the end face of the other segment to be joined, and in the segment that joins the segments,

Male and female hardware that both ends function as male hardware can be attached to the segment body,

A female metal fitting into which male and female hardware is pushed is embedded in the segment body,

A segment characterized by the following.

10. The segment according to claim 9, wherein the male and female hardware is provided with an annular waterproof material near the center in the length direction.

1 1. Push the male hardware that protrudes and is fixed to the end face of the segment to be joined into the hollow part of the female hardware buried in the end face of the other segment that is to be joined. ,

The male hardware is

A cylindrical hollow member having one end opened by being pushed into the cylindrical hollow portion of the female metal part, and a bottom lid portion closing the opening;

At the time of segment production, a screw part to connect a jig for fixing the male hardware to the formwork is provided on the bottom lid part,

The jig is freely inserted into the hollow member on the side opposite to the bottom lid portion, and a through hole for injecting a filler into the hollow member is provided,

A segment formed by embedding a part of a hollow member in a segment body and then filling a filling member from the through hole.

1 2. Push the male hardware that protrudes and is fixed to the end face of the segment to be joined into the open hollow part of the female hardware buried in the end face of the other segment that is to be joined. ,

The male hardware is A cylindrical hollow exterior member having one end opened,

A filling member accommodated in the cylindrical hollow portion of the exterior member,

An anchor portion fixed to a base side of the filling member,

A protrusion is provided at the tip of the filling member, and a screw portion is provided on the protrusion to connect a jig for fixing a male metal member to a mold during segment production.

Providing a through-hole for penetrating the protrusion at the tip of the exterior member,

A segment in which the filling member is housed in the exterior member such that the protrusion of the filling member fits into the through hole of the exterior member.

1 3. Push the male hardware that is projected and fixed to the end face of the segment to be joined into the hollow part of the female hardware buried in the end face of the other segment that is to be joined, and in the segment that joins the segments. ,

The male hardware is

A cylindrical hollow member, one end of which is pushed into the cylindrical hollow portion of the female metal part, and an opening.

A filling member filled in the hollow portion of the cylindrical hollow member,

A plurality of blades mounted outward on the support,

Anchor extending in the support section in the axial direction,

A segment formed by providing a through-hole at the tip of the hollow member, and providing a screw at the tip of the filling member to connect a jig for fixing a male metal member to a mold when the segment is manufactured.

1 4. In the segment that joins the segments by pushing the male hardware that is projected and fixed to the end face to be joined of the other segment into the opening hollow part of the female hardware embedded in the end face of the segment to be joined,

The female hardware is

A cylindrical part into which male hardware is pushed,

A bottom cover or anchor unit integrally provided so as to close one open end of the cylindrical portion;

A segment that has a threaded part on the bottom lid or part of the anchor that connects a jig for fixing the female hardware to the formwork during segment production.

15 5. In the segment that joins the segments by pushing the male hardware that is projected and fixed to the end face to be joined of the other segment into the hollow part of the female hardware embedded in the end face of the segment to be joined,

The female hardware is

A cylindrical part into which male hardware is pushed,

A support portion for closing one open end of the cylindrical portion,

A plurality of blades mounted outwardly on the support,

An anchor extending in the support portion in the axial direction;

A segment provided with a screw portion for connecting a jig for fixing a female metal piece to a formwork at the time of segment production.