JP6576694B2 - Precast foundation joint structure - Google Patents

Description

  The present invention relates to a precast foundation joint structure in which both end faces of a pair of precast foundations are joined together in a substantially butted state.

Conventionally, in a fabric foundation of a building such as a house, as shown in FIG. 22 (C), the rising portion may be a precast foundation 21 and the base portion 22 may be a cast-in-place concrete. The on-site hitting of the base portion 22 is performed after the placement of the precast foundation 21.
A plurality of precast foundations 21 are arranged in the longitudinal direction, and are joined so that a load can be transmitted between them. Specifically, as shown in FIGS. 2A and 2B, of the pair of precast foundations 21 and 21 to be joined to each other, one precast foundation 21 has a male side joint hardware protruding from its end face. 31 is provided in an embedded state. The other precast foundation 21 is provided with a female joint fitting 32 fitted into the male joint fitting 31 so as to open to the end face and the upper surface of the precast foundation 21. As shown in the enlarged horizontal plan view of FIG. 23, the protruding portion 31a of the male side fitting 31 is fitted into the joining groove 32a of the female side fitting 32, so that the male side fitting 31 and the female side fitting 32 are connected. By filling the fitting gap with a curable filler (not shown) such as grout, the pair of precast foundations 21 and 21 are joined in the longitudinal direction between both end faces as shown in FIG. Note that an anchor 33 made of a reinforcing bar or the like is joined to the male-side joining hardware 31 and the female-side joining hardware 32.

JP 2013-227787 A

  In the conventional precast foundation joint structure described above, when a tensile force F in the longitudinal direction of the foundation acts between the two precast foundations 21 and 21 as shown in FIG. 23, the male joint fitting 31 and the female joint fitting 32 are fitted. As a result, the tensile force F is transmitted between the two precast foundations 21 and 21. However, in the joint structure shown in the figure, the curable filler filled in the fitting gap between the male-side joint metal 31 and the female-side joint metal 32 is compressed by the tensile force F so that the male-side joint 31 and female There is a concern that the side joint metal 32 is displaced, the displacement proceeds, and a gap is generated in the fitting portion between the male side joint metal 31 and the female side joint metal 32. When the gap is generated, the displacement increases and the tensile force F cannot be effectively transmitted.

  An object of the present invention is to provide a precast basic joint structure that can effectively transmit a tensile force by suppressing generation of a gap due to deformation of a filler interposed between male and female joint hardware even when subjected to a tensile force. is there.

In the precast foundation joint structure of the present invention, a male side joint hardware projecting from the end face and having a T-shaped horizontal cross section of the projecting portion is formed on one of the precast foundations in a pair of precast foundations joining the end faces in a substantially abutted state. It is provided in an embedded state at the leg. The other precast foundation is provided with a female-side joint fitting having a T-shaped joining groove portion into which the male-side joint fitting fits through a gap, and is open to the end surface and the upper surface. A curable filler is filled in the fitting gap between the joint metal and the female joint metal.
A neck side gap that is a gap between a neck side surface of the head of the male side joint hardware and an inner surface portion of the joint groove of the female side joint metal facing the neck side surface, and a head side of the male side joint hardware Longitudinal direction acting between the two precast foundations in one or both of the anti-neck side gap, which is a gap between the anti-neck side surface and the inner surface portion of the joint groove of the female side metal fitting facing the anti-neck side surface metal filling member for transmitting the load you intervention.

  According to this configuration, since the filler interposed in one or both of the neck-side gap and the anti-neck-side gap generated between the male-side joint metal and the female-side joint metal is a metal filling member, the grout or the like is cured. Unlike the filler of the nature, even if the longitudinal tensile force acting between the two precast foundations is large, the filler is a metal filling member and is hardly deformed, and the generation of a gap due to the deformation is suppressed. Therefore, a tensile force can be effectively transmitted between both precast foundations.

Precast foundation joint structure of the present invention, Oite to the arrangement, the metal filling member, of the neck-side gap, the pair of insertion piece to be interposed neck-side gap on both sides sandwiching the neck of the male-side joint hardware And a downward groove-shaped part including a connecting piece portion that connects the upper ends of the pair of insertion piece portions and rests on the male-side joining metal piece, and the connecting piece portion is the female-side joining metal piece. The concrete portion of the precast foundation provided with is located in an upper groove portion formed above the female joint metal fitting, and a curable filler is filled in the upper groove portion .

  In the case of this configuration, the metal filling member has a pair of insertion piece portions interposed between the neck side gaps on both sides and is connected by a connecting piece portion, and therefore, individual metal filling members are interposed in the neck side gaps on both sides. Compared with the case of making it, the workability | operativity of the insertion work to a neck side clearance improves. In addition, since the connecting piece portion is located in the upper groove portion and is embedded in the curable filler in the upper groove portion, the connecting piece portion is filled when the metal filling member receives a tensile force. By receiving the reaction force from the material, the displacement of the metal filling member is prevented from proceeding. Further, when the metal filling member is inserted into the neck side gap, the connecting piece portion is placed on the neck portion of the male joint metal fitting, so that the metal filling member is prevented from falling into the neck side gap. Is done.

When the metal filling member has the connecting piece portion, the metal filling member has a pair of protruding piece portions that protrude from the connecting piece portion on both sides and are mounted on the female-side joint hardware, and are the same as each other. The metal filling member having a shape may be interposed between the neck-side gap and the anti-neck-side gap.
In this way, when the metal filling member has a pair of overhanging pieces that are placed on the female side joint metal, the overhanging pieces are placed on the female side joint metal, so that the metal filling member is in the anti-neck side gap. It is possible to prevent depression.

  In this invention, the metal filling member may have ribs extending in the vertical direction at a plurality of positions in the width direction of the upper piece portion constituted by the connecting piece portion and the protruding piece portion. If the said rib is provided, the intensity | strength of the upper piece part of a metal filling member will increase by this rib. Therefore, when the upper end of the metal filling member is hit and inserted into the neck side gap or the anti-neck side gap, the metal filling member is not deformed and can be smoothly inserted.

In this invention, the whole metal filling member has a downward groove shape formed by the pair of insertion piece portions and the connection piece portion, and extends in the vertical direction at a plurality of positions in the width direction of the connection piece portion. It is good also as what has a rib.
Even when the protruding piece portion is not provided, when the rib is provided, the strength of the metal filling member increases, and when the upper end of the metal filling member is struck and inserted into the neck side gap or the anti-neck side gap, The effect that the metal filling member can be smoothly inserted without being deformed is obtained.

In the present invention, a plurality of the metal filling members may be overlapped and interposed in either one or both of the neck side gap and the anti-neck side gap.
The size of the gap between the neck-side gap and the anti-neck-side gap located on both sides of the head depends on the biased position in the joining groove in the female-side fitting. Fluctuates. Such a variation in the size of the gap can be dealt with by adjusting the number of stacked metal filling members.

In this invention, the metal filling member is made of round steel or a steel plate, and the metal filling members that are separate from each other are disposed in the neck side gaps on both sides of the neck side gap between the leg parts of the male side joint metal. It may be interposed.
When the metal filling member is a round steel plate or a steel plate, the metal filling member may have a simple configuration. Also in this case, it is difficult to cause the metal filling member to be deformed, and an effect that the generation of a gap due to the deformation is suppressed can be obtained.

  In the precast foundation joint structure of the present invention, a male side joint hardware projecting from the end face and having a T-shaped horizontal cross section of the projecting portion is formed on one of the precast foundations in a pair of precast foundations joining the end faces in a substantially abutted state. A female joint fitting having a T-shaped joining groove portion with a horizontal cross section in which the male joint fitting is fitted into the other precast foundation through a gap is opened in the end surface and the upper surface. A precast basic joint structure in which a hardened filler is filled in a fitting gap between the male-side joint hardware and the female-side joint hardware, and a neck side surface of the head of the male-side joint hardware and the neck A neck-side clearance that is a clearance with the inner surface portion of the joining groove of the female-side joint metal facing the side surface, and an anti-neck side surface and the anti-neck side of the head side of the male-side joint hardware Metal filling for transmission of a longitudinal load acting between the two precast foundations in one or both of the gaps between the opposite sides of the female side joint hardware facing the inner surface of the joint groove Since the member is interposed, even if a tensile force acts between the precast foundations, the generation of a gap due to the deformation of the filler interposed between the male and female joint hardware is suppressed, and the tensile force can be transmitted effectively.

(A) is a top view of the precast foundation in which the male side joint metal fitting in the precast foundation joint structure concerning one Embodiment of this invention was embedded, (B) is the same front view. (A) is a horizontal sectional view of the same precast foundation, and (B) is a longitudinal sectional view thereof. (A) is the elements on larger scale of the precast foundation, (B) is the horizontal sectional view. It is a partial expanded longitudinal cross-sectional view of the same precast foundation. (A) is a VA-VA arrow front view in FIG. 4, (B) is VB-VB arrow sectional drawing, (C) is VC-VC arrow sectional drawing. (A) is a partial enlarged plan view of a precast foundation in which a female side joint hardware is embedded, and (B) is a horizontal sectional view thereof. It is a partial expanded longitudinal cross-sectional view of the same precast foundation. (A) is a VIIIA-VIIIA arrow front view in FIG. 7, (B) is a VIIIB-VIIIB arrow sectional view, (C) is a VIIIC-VIIIC arrow sectional view. (A) is a plan view showing a state before the metal filling member of the joint fitting part is interposed, (B) is a plan view showing a state where the metal filling member is interposed in the joint fitting part, (C) is It is a top view which shows the state with which the joint metal fitting part was filled with the curable filler. (A) is a top view of a metal filling member, (B) is the same front view. (A) is a front view of a joint fitting fitting section as seen from the cross section of the female joint fitting, (B) is a joint fitting fitting section as seen from the back side of the female joint fitting by crossing the female joint fitting. FIG. It is a top view which shows the joining hardware fitting part in the precast basic joining structure concerning other embodiment of this invention. (A) is a top view which shows the other example of metal filling members, (B) is the same front view. (A) is a top view which shows the other example of a metal filling member, (B) is the same front view. (A) is a top view which shows the other example of a metal filling member, (B) is the same front view. It is a top view of the joint fitting fitting part in which the metal filling member was interposed. (A) is a top view which shows the other example of a metal filling member, (B) is the same front view. It is a front view which shows the other example of a metal filling member. It is a top view of the joint fitting fitting part in which the metal filling member was interposed. It is a front view which shows the other example of a metal filling member. It is a top view of the joint fitting fitting part in which the metal filling member was interposed. It is a top view, a front view, and a side view of a conventional example. It is an enlarged plan view of the joint fitting fitting part in the conventional example.

An embodiment of the present invention will be described with reference to FIGS. 1A and 1B show a plan view and a front view of one precast foundation 1A in a pair of precast foundations 1A and 1B (FIG. 9) joined by the precast foundation joining structure of this embodiment. 2A and 2B show a horizontal sectional view and a longitudinal sectional view of the precast foundation 1A as viewed from the front side. 3A is an enlarged view of a part of FIG. 1A, FIG. 3B is an enlarged view of a part of FIG. 2A, and FIG. The part is shown enlarged.
This precast foundation 1A is a precast concrete body that constitutes a rising portion of a cloth foundation in a building such as a house. Inside the concrete portion 19 of the precast foundation 1A, an upper end reinforcement 2 extending in the longitudinal direction of the foundation, a stirrup extension 3 extending vertically, and an anchor bolt 5 are embedded, and the stirrup 3 protruding from the lower end of the precast foundation 1A is embedded. The lower end reinforcement 4 which is the main reinforcement of the base portion 20 of the fabric foundation (shown in phantom lines in FIG. 5A) is welded to the lower end.

  The precast foundation 1A is provided with a male side fitting 11 projecting from its end face in an embedded state with a leg 11b. The protruding portion 11a of the male side metal fitting 11 has a T-shaped horizontal cross section. Here, the male-side joint hardware 11 is provided at a position near the upper part in the vicinity of both end faces of the precast foundation 1A. One end of a plurality of anchors 6 made of reinforcing bars extending in the longitudinal direction of the base is joined to the back surface of the male side hardware 11 by screwing or the like. By positioning these anchor bars 6 to, for example, the loose bars 3 with a binding line (not shown), the male side metal fitting 11 is positioned when the concrete is not hardened.

  On the end face of the precast foundation 1A from which the protruding portion 11a of the male side metal fitting 11 protrudes, as shown in FIG. 5 (A) showing a front view of the VA-VA arrow in FIG. A cotter forming recess 7Ba is formed. 7 A of groove parts are formed in the upper part from the position of the male side joining metal object 11 to an upper surface, and the groove part 7B is formed over the lower part from the position of the male side joining metal object 11 to a lower end. A plurality of the cotter forming recesses 7Ba are formed in the middle of the groove 7B below the position of the male side metal fitting 11. The cotter forming recess 7Ba is formed deeper than the groove 7B and wider than the width of the groove 7B. 5B is a cross-sectional view taken along arrow VB-VB in FIG. 4, and FIG. 5C is a cross-sectional view taken along arrow VC-VC in FIG. In addition, as shown in FIG. 2B, the precast foundation 1A is provided with two suspension couplers 9 for lifting and lifting the precast foundation 1A in an embedded state.

  The other precast foundation 1B in the pair of precast foundations 1A and 1B has a bar arrangement structure that is substantially the same as that of the one precast foundation 1A, but in this precast foundation 1B, FIG. 6 (A), (B) Are shown in a partial plan view and a partial horizontal sectional view, and as shown in a partial longitudinal sectional view in FIG. The female side metal fitting 12 has a joining groove portion 12a into which the male side metal fitting 11 of the precast foundation 1A is fitted via a gap, and is provided to be opened on the end surface and the upper surface of the precast foundation 1B. The female side metal fitting 12 is provided near the upper part of the precast foundation 1B so as to face the male side metal fitting 11 of the precast foundation 1A. Similarly to the male side metal fitting 11, the female side metal fitting 12 is joined to one end of a plurality of anchors 6 made of reinforcing bars extending in the basic longitudinal direction by screwing or the like. By positioning these anchors 6 to, for example, the loose streaks 3 with a binding wire (not shown), the female side joint hardware 12 is positioned when the concrete is not hardened.

  On the end face of the precast foundation 1B where the female side joint metal 12 is opened, as shown in FIG. 8 (A) showing a front view taken along the line AA in FIG. 7, a portion extending from the position of the female side joint metal 12 to the upper surface. Grooves 8A and 8B are formed from the position of the male side fitting 12 to the lower end. Further, a plurality of cotter forming recesses 8Ba are formed in the middle of the groove 8B below the position of the female joint metal 12 on the end face of the precast foundation 1B. The cotter forming recess 8Ba is formed deeper than the groove 8B and wider than the groove 8B. 8B is a cross-sectional view taken along arrow VIIIB-VIIIB in FIG. 7, and FIG. 8C is a cross-sectional view taken along arrow VIIIC-VIIIC in FIG.

  FIG. 9 (A) shows a partially enlarged plan view of the pair of precast foundations 1A and 1B in a state where their end faces are joined to each other in a substantially abutted state. In this joined state, the precast foundation 1B having the female joint hardware 12 is first supported in a standing posture on the foundation support surface at the foundation construction place, and then the precast foundation 1A having the male joint hardware 11 is provided. The protruding portion 11a of the male joint 11 is lifted up in a standing posture with the joint groove 12a of the female joint 12 of the precast foundation 1B installed through a gap. This is achieved by lowering it on the base support surface.

  As shown in FIG. 9 (A), the protruding portion 11a of the male side metal fitting 11 has a T-shaped horizontal cross section as described above, and the protruding portion 11a is a gap between the bonding groove portion 12a of the female side metal fitting 12. It is made into the horizontal cross section T shape fitted through. In the state in which the male side joining hardware 11 and the female skin joining hardware 12 are fitted in this way, the two precast foundations are formed in the gap between the male side joining hardware 11 and the female skin joining hardware 12 as shown in FIG. A metal filling member 14 for transmitting a longitudinal load acting between 1A and 1B is interposed. In this embodiment, a steel plate filler plate is used as the metal filling member 14. Specifically, in the neck side gap 13a which is a gap between the neck side surface of the head 11aa of the male side metal fitting 11 and the inner surface part of the joint groove portion 12a of the female side metal fitting 12 facing the neck side surface, FIG. A metal filling member 14 made of a filler plate having a shape shown in the plan view and the front view is interposed in A) and (B). A plurality of metal filling members 14 may be used in an overlapping manner. In this case, the number of the metal filling members 14 is made different depending on the size of the neck-side gap 13a.

The metal filling member 14 made of the filler plate includes a pair of insertion piece portions 14a, 14a interposed between the neck side gaps 13a, 13a on both sides of the neck side gap 13a with the neck portion 11ab of the male side fitting 11 interposed therebetween. The pair of insertion piece portions 14a and 14a has a downward groove-shaped portion including the connecting piece portion 14b that connects the upper ends of the pair of insertion piece portions 14a and 14a and rests on the male side fitting 11. As shown in FIG. 9B, the connecting piece portion 14b is an upper groove portion 8A formed on the concrete portion 19 of the precast foundation 1B provided with the female side joint hardware 12 and positioned above the female side joint hardware 12. Located in. FIG. 11 (A) is a side view showing the state of the female side joint hardware 12 in a cross-section, and FIG. 11 (B) is a rear view seen from the back side of the female side joint metal 12.
The metal filling member 14 has a pair of projecting piece portions 14 c that project from the connecting piece portion 14 b to both sides and are mounted on the female-side joining hardware 12. In addition, a plurality of ribs 14d having a horizontal cross section extending in the vertical direction are formed at a plurality of positions in the width direction of the upper piece portion constituted by the connecting piece portion 14b and the protruding piece portion 14c. The rib 14d is formed by bending a part of a metal filling member 14 made of a filler plate into a mountain-shaped cross section.

  In the joined state of the two precast foundations 1A and 1B, a curable filler is filled into the fitting gap between the male-side joint metal 11 and the female-side joint metal 12 from the upper grooves 7A and 8A. As the curable filler, for example, grout, cement paste, cement milk, mortar, and resin-based material (for example, epoxy-based resin) can be used, but here, grout 15 is used. The grout 15 is filled from the upper groove portions 7A and 8A of the two precast foundations 1A and 1B into the fitting gap between the male side metal fitting 11 and the female side metal fitting 12, and further reaches the lower groove portions 7B and 8B. The cotter forming recesses 7Ba and 8Ba are also filled, and a plurality of cotters are formed between the end faces of the two precast foundations 1A and 1B. Further, as shown in FIG. 9C, the connecting piece portion 14b and the overhanging piece portion 14c of the metal filling member 14 made of the filler plate exposed in the upper groove portions 7A and 8A are formed in the upper groove portion 7A, It is embedded in the grout 15 filled with 8A.

  According to the precast basic joint structure of this configuration, the neck side gap 13a which is a gap between the neck side surface of the head 11aa of the male side joint hardware 11 and the inner surface portion of the joint groove portion 12a of the female side joint hardware 12 facing the neck side surface. A metal filling member 14 made of a filler plate for transmitting a longitudinal load acting between the two precast foundations 1A and 1B is interposed between the male side joint metal 11 and the female side joint metal 12 in the fitting gap. Grout 15 which is a curable filler is filled. For this reason, even if the male side metal fitting 11 and the female side metal fitting 12 receive the tensile force F in the longitudinal direction of the foundation as shown in FIG. 11 (A), the displacement of the joint portion of both the precast foundations 1A and 1B is kept small. The tensile force F can be transmitted effectively. That is, when the grout 15 filled in the fitting gap between the male-side fitting 11 and the female-side fitting 12 receives the compressive force F and compresses it, there is a gap at the connecting portion between the male-side fitting 11 and the female-side fitting 12. However, since the metal filling member 14 made of a filler plate is interposed in the neck-side gap 13a, the displacement of the joint portion between the two precast foundations 1A and 1B can be suppressed to a small value. , 1B can effectively transmit the tensile force F.

  Moreover, in this embodiment, the metal filling member 14 made of a filler plate has a pair of insertion piece portions 14a and 14a interposed between the neck side gaps 13a and 13a on both sides sandwiching the neck portion 11ab of the male side fitting 11, and these A pair of insertion piece portions 14a, 14a are connected to each other at the upper end of the pair of insertion piece portions 14a, 14a so as to have a downward groove-shaped shape portion including a connection piece portion 14b mounted on the male-side joint metal piece 11. The connecting piece portion 14b is located in the upper groove portion 8A formed on the concrete portion 19 of the precast foundation 1B provided with the female-side joint metal piece 12 so as to be located above the female-side joint metal piece 12, and this groove portion. The grout 15 which is a curable filler is filled in 8A. For this reason, when receiving the tensile force F, the connecting piece 14b receives the reaction force P from the grout 15 as shown in FIG. Can be prevented from proceeding.

  Moreover, in this embodiment, the rib of the horizontal cross-sectional angle | corner extended in an up-down direction in several width direction places of the upper piece part comprised by the said connection piece part 14b and the overhang | projection piece part 14c of the metal filling member 14 which consists of filler plates 14d. Therefore, when the upper end of the metal filling member 14 made of the filler plate is hit and inserted into the neck-side gap 13a, the metal filling member 14 is not deformed and can be inserted smoothly.

Although FIG. 9 shows the case where the metal filling member 14 is interposed in the neck side gap 13a in the fitting gap between the male side joint metal 11 and the female side joint metal 12, the present invention is not limited to this. As shown in the figure, an anti-neck side gap 13b, which is a gap between the anti-neck side surface of the head 11aa of the male side metal fitting 11 and the inner surface part of the joint groove portion 12a of the female side metal fitting 12 facing the anti-neck side surface, is formed. A metal filling member 14 made of the filler plate may be interposed.
In this case, the pair of overhanging pieces 14c, 14c of the metal filling member 14 are placed on the female joint fitting 12, and the ribs 14d are also on the head 11aa of the male joint fitting 11 and the female joint fitting 12. Since it protrudes, it can prevent that the metal filling member 14 falls in the said anti-neck side clearance gap 13b. Other effects are the same as those of the configuration example shown in FIG.

  Further, the interposition position of the metal filling member 14 is not limited to the case of the neck side gap 13a shown in FIG. 9 and the case of the counter neck side gap 13b shown in FIG. May be interposed in both the neck side gap 13a and the anti-neck side gap 13b.

  Moreover, in the said embodiment, although the case where the rib 14d of the metal filling member 14 was a horizontal cross-sectional mountain shape was shown, as shown in a top view and a front view to FIG. 13 (A), (B), the said rib 14d is shown. A metal filling member 14 having a semicircular horizontal cross section may be used. In addition, as shown in a plan view and a front view in FIGS. 14A and 14B, a metal filling member 14 having a trapezoidal horizontal cross section may be used as the rib 14d.

  15 and 16 show another embodiment of the present invention. In this embodiment, as shown in the plan view and the front view in FIGS. 15A and 15B, the metal filling member 14 made of a filler plate in the previous embodiment shown in FIG. The thing of the downward groove shape which consists of insertion piece part 14a, 14a and the said connection piece part 14b is used. As shown in FIG. 16, the metal filling member 14 includes neck gaps 13 a on both sides sandwiching the neck 11 ab of the male joint 11 among the fitting gaps between the male joint 11 and the female joint 12. The pair of insertion pieces 14a and 14a are interposed in 13a. Other configurations and operational effects are substantially the same as those of the previous embodiment shown in FIGS.

  In this embodiment, the metal filling member 14 made of the filler plate is vertically arranged at a plurality of positions in the width direction of the connecting piece 14b, as shown in the plan view and the front view in FIGS. 17 (A) and 17 (B). It is good also as what has the rib 14d extended in this. In this case, when the upper end of the metal filling member 14 made of a filler plate is hit and inserted into the neck-side gap 13a, the metal filling member 14 is not deformed and can be inserted smoothly.

  18 and 19 show still another embodiment of the present invention. In this embodiment, in the previous embodiment shown in FIG. 9, a pair of round steel 16 and 16 is used as a metal filling member as shown in FIG. As shown in FIG. 19, the pair of round steels 16, 16 includes a neck-side gap 13 a on both sides sandwiching the neck 11 ab of the male-side joint 11 among the fitting gap between the male-side joint 11 and the female-side joint 12. , 13a. Other configurations and operational effects are substantially the same as those of the previous embodiment shown in FIGS.

  In each of the above-described embodiments, one precast foundation 1A to be joined to each other has a male-side joint hardware 11 at both ends, and the other precast foundation 1B has a female-side joint hardware 12 at both ends. The bases 1A and 1B may have a configuration in which the male side joint metal 11 is provided at one end and the female side joint metal 12 is provided at the other end.

  20 and 21 show still another embodiment of the present invention. In this embodiment, in the previous embodiment shown in FIG. 9, a pair of strip-shaped steel plates 17, 17 are used as the metal filling member as shown in FIG. As shown in FIG. 21, the pair of steel plates 17, 17 includes neck gaps 13 a on both sides sandwiching the neck 11 ab of the male joint 11 among the fitting gaps between the male joint 11 and the female joint 12. 13a. Other configurations and operational effects are substantially the same as those of the previous embodiment shown in FIGS.

DESCRIPTION OF SYMBOLS 1A, 1B ... Precast foundation 11 ... Male side metal joint 11a ... Projection part 11aa ... Head part 11ab ... Neck part 11b ... Leg part 12 ... Female side metal joint 12a ... Joint groove part 13a ... Neck side clearance 13b ... Anti-neck side clearance 14 ... Metal filler (filler plate)
14a ... Insert piece 14b ... Connecting piece 14c ... Overhang piece 14d ... Rib 15 ... Grout (curable filler)
16 ... Round steel (metal filler)
17 ... Steel plate (metal filler)

Claims (6)

One precast foundation in a pair of precast foundations that join the end faces to each other in a substantially abutted state protrudes from the end face, and a male-side joint hardware having a T-shaped horizontal cross section of the projecting part is provided in an embedded state in the legs. The other side of the precast foundation is provided with a female side joint metal having a T-shaped joint groove portion in which the male side joint metal is fitted through a gap, and is open to the end surface and the upper surface. In the precast basic joint structure in which a curable filler is filled in the fitting gap between the hardware and the female joint metal,
A neck side gap that is a gap between a neck side surface of the head of the male side joint hardware and an inner surface portion of the joint groove of the female side joint metal facing the neck side surface, and a head side of the male side joint hardware Longitudinal direction acting between the two precast foundations in one or both of the anti-neck side gap, which is a gap between the anti-neck side surface and the inner surface portion of the joint groove of the female side metal fitting facing the anti-neck side surface A metal filling member for load transmission is interposed,
The metal filling member connects a pair of insertion piece portions interposed between the neck side gaps on both sides sandwiching the neck portion of the male side joint metal in the neck side gap, and connects the upper ends of the pair of insertion piece portions to each other. A downward groove-shaped portion including a joining piece portion mounted on a male-side joining hardware, and the joining piece portion is provided on the female side of the precast foundation concrete portion provided with the female-side joining hardware. A precast basic joint structure, which is located in an upper groove formed above the joint metal, and is filled with a curable filler. 2. The precast basic joint structure according to claim 1 , wherein the metal filling member includes a pair of projecting piece portions that project from both sides of the joint piece portion on both sides to be placed on the male joint metal fitting, and have the same shape as each other. A precast basic joint structure in which a metal filling member is interposed between the neck side gap and the anti-neck side gap. 3. The precast basic joint structure according to claim 2 , wherein the metal filling member has ribs extending in the vertical direction at a plurality of positions in a width direction of an upper piece portion constituted by the connecting piece portion and the protruding piece portion. Basic joint structure. 2. The precast basic joint structure according to claim 1 , wherein the entire metal filling member has a downward groove shape formed by the pair of insertion piece portions and the connection piece portion, and the width direction of the connection piece portion. A precast basic joint structure having ribs extending in the vertical direction at a plurality of locations. In precast foundation joint structure according to any one of claims 1 to 4, wherein the metal filling member is piled plurality either or both of the neck-side gap and said counter-neck side gap Interposed precast foundation joint structure. One precast foundation in a pair of precast foundations that join the end faces to each other in a substantially abutted state protrudes from the end face, and a male-side joint hardware having a T-shaped horizontal cross section of the projecting part is provided in an embedded state in the legs. The other side of the precast foundation is provided with a female side joint metal having a T-shaped joint groove portion in which the male side joint metal is fitted through a gap, and is open to the end surface and the upper surface. In the precast basic joint structure in which a curable filler is filled in the fitting gap between the hardware and the female joint metal,
A neck side gap that is a gap between a neck side surface of the head of the male side joint hardware and an inner surface portion of the joint groove of the female side joint metal facing the neck side surface, and a head side of the male side joint hardware Longitudinal direction acting between the two precast foundations in one or both of the anti-neck side gap, which is a gap between the anti-neck side surface and the inner surface portion of the joint groove of the female side metal fitting facing the anti-neck side surface A metal filling member for load transmission is interposed,
The precast foundation in which the metal filling member is made of round steel or a steel plate, and the metal filling members that are separate from each other are interposed in the neck side gaps on both sides of the neck side gap between the leg portions of the male side fittings Junction structure.

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