JP2016180249A - Pile head part joining method and pile head part support structure for precast concrete member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pile head part joining method for a precast concrete member by which positioning of a pile head part and a precast concrete member can be easily performed, construction cost can be reduced and a construction period can be shortened, and a pile head part support structure therefor.SOLUTION: In a pile head joining method, by using joint support members 3 each comprising a member-side support tool 15 fixed to a precast concrete member 2 and a pile-side support tool 16 capable of relatively moving in axis and radial directions of a pile to the member-side support tool 15 and being fixed to the outer peripheral surface of a pile head part, a relative position of the pile head part 1a and the precast concrete member 2 is adjusted. Meanwhile, the member-side support tool 15 and the pile-side support tools 16 are rigidly joined after adjusting relative positions of the member-side support tools 15 and the pile-side support tools 16, to make the pile head part 1a support the precast concrete member 2 while interposing the joint support members 3.SELECTED DRAWING: Figure 5

Description

  In the construction of a structure such as a pier in which a beam is supported by a plurality of piles, the present invention mainly applies the precast concrete member to the pile head when joining the precast concrete member and the pile head constituting the beam. The present invention relates to a pile head joining method of a precast concrete member to be supported and a pile head support structure.

  Conventionally, a structure with a beam supported by multiple piles such as a pier, after placing each pile on the bottom of the water, etc., constructing a steel frame between these adjacent piles, arranging reinforcing bars, etc. Forms were formed between the piles using the supported support works, and beams were formed by casting the concrete in the field, and the beams and the pile heads were joined.

  However, in such a construction method, the beam is made of cast-in-place concrete, so installation of work scaffoldings and supporters for each work, placement of reinforcing bars and steel frames, assembly / disassembly of formwork, placement of concrete, All work such as curing had to be performed at the construction site, and there was a problem that the influence of sea conditions and weather conditions was great and the construction period was prolonged.

  In view of such problems, conventionally, one or a plurality of precast concrete members constituting a beam are manufactured in advance in an on-site factory or production yard, which is transported to a construction site and installed on a crane ship or on land. The crane is lifted by a crane and the precast concrete member is installed on the pile head, and the concrete is placed between the pile head and the precast concrete member in that state, so that the beam is joined to the pile head. Is used (see, for example, Patent Document 1).

  In this type of construction method, a pre-cast concrete member is provided with a through-hole into which a pile head is inserted, and a support member such as a steel frame is projected from the inner peripheral surface of the through-hole. The lower surface of the pile is received by a bracket projecting on the upper surface of the pile or the outer peripheral surface of the pile, and the precast concrete member is temporarily supported on the pile. It was like that.

Japanese Patent Laid-Open No. 8-100144

  However, in the conventional technology as described above, since the support member of the precast concrete member is supported by a bracket fixed to the upper surface portion of the pile or the outer peripheral surface of the pile head, the precast concrete member is installed at a desired height. In order to achieve this, the pile upper surface or bracket height that supports the support member of each pile must match, and therefore, it is necessary to install each pile or bracket with high accuracy, which is complicated and costly. In addition, there is a problem that the construction period increases.

  Moreover, in joining such a precast concrete member and a pile head, in order to compensate for the shortage of the embedding length with respect to the pile head moment, the reinforcing bar embedded in the precast member is directly or via a fixing plate to the pile head. There are many cases where joining is required by welding or the like.

  In that case, in the conventional technique, since the installation position of the reinforcing bar embedded in the precast concrete member is determined by the relative position to the support member, each pile or bracket has a higher accuracy in consideration of the reinforcing bar position. There is a problem that installation is required, and there is a problem that it is difficult to respond flexibly to design changes.

  Therefore, in view of such a conventional problem, the present invention can easily align the pile head and the precast concrete member, and can reduce the construction cost and the construction period. The purpose is to provide a joining method and a pile head support structure.

  The feature of the invention according to claim 1 for solving the conventional problems as described above is that a precast concrete member is supported on a pile head and concrete is placed between the pile head and the precast concrete member in that state. In the pile head joining method of a precast concrete member that joins the pile head and the precast concrete member, a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member And, in a state where the position of the precast concrete member with respect to the pile head is fixed, relative movement is possible in the pile axial direction and the pile radial direction with respect to the member side support tool, and is fixed to the outer peripheral surface of the pile head. Use a joint support member consisting of a possible pile side support tool, the relative position of the pile head and the precast concrete member And adjusting the relative position between the member-side support tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool to the pile head. It exists in the pile head joining method of the precast concrete member which supports the said precast concrete member via a member.

  The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the relative position of the pile head and the precast concrete member is adjusted, and the relative of the pile side support to the member side support After adjusting a position, it exists in fixing the said pile side support tool to the said pile head.

  The invention according to claim 3 is characterized in that, in addition to the structure of claim 1, the pile-side support is fixed in advance to the outer periphery of the pile head, and the pile head and the precast concrete member are in that state. The relative position between the member side support tool and the pile side support tool is adjusted while adjusting the relative position between the pile side support tool and the member side support tool. .

  According to a fourth aspect of the present invention, in addition to the structure of any one of the first to third aspects, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame is suspended from the crane. A hanging frame body to be held, a hanging tool for supporting the precast concrete member disposed below the hanging frame body on the hanging frame body, and a position aligned with the pile insertion portion of the hanging frame body. A height-adjustable support leg, the support leg is supported on the top of the pile head, the suspension frame is supported on the pile, and the height of the support leg is adjusted. This is to adjust the relative height between the pile head and the precast concrete member.

  The feature of the invention according to claim 5 for solving the conventional problems as described above is that when the precast concrete member is joined to the pile head, the precast concrete member is connected to the pile head via a joining support member. In the pile head support structure of a precast concrete member that is temporarily supported, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile In the state where the position of the precast concrete member with respect to the head is fixed, the pile side that is movable relative to the member-side support tool in the pile axial direction and the pile radial direction and fixed to the outer peripheral surface of the pile head And a coupling means for rigidly coupling the pile-side support tool and the member-side support tool, the phase between the pile head and the precast concrete member. When adjusting the position, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool can be rigidly coupled at the adjusted position. It is in the pile head support structure of the precast concrete member made.

  The pile head joining method of the precast concrete member according to the present invention, as described above, allows the pile head to support the precast concrete member, and in that state, the concrete is filled between the pile head and the precast concrete member. In the pile head joining method of the precast concrete member for joining the pile head and the precast concrete member, a member-side support fixed to the surface facing the pile head outer peripheral surface of the precast concrete member, In a state where the position of the precast concrete member with respect to the pile head is fixed, it can be moved relative to the member-side support tool in the pile axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head. Using a joint support member comprising a pile side support tool, the pile head and the precast concrete member And adjusting the relative position between the member-side support tool and the pile-side support tool, and then rigidly coupling the pile-side support tool and the member-side support tool to the pile head By supporting the precast concrete member via the joint support member, the relative position adjustment of the precast concrete member with respect to the pile head can be performed for each pile, so high accuracy is not required when installing the pile, Since the pile installation work becomes easy, the construction period and cost can be reduced.

  Moreover, in this invention, while adjusting the relative position of the said pile head and the said precast concrete member, after adjusting the relative position of the said pile side support tool with respect to the said member side support tool, the said pile side support tool is said By fixing to the pile head, the position adjustment of the precast concrete member with respect to the pile head becomes easy.

  Furthermore, in this invention, the said pile side support tool is previously fixed to the outer periphery of the said pile head, and the said member side support is adjusted, adjusting the relative position of the said pile head and the said precast concrete member in that state. By adjusting the relative position of the tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool, the precast concrete member can be easily aligned with the pile head. Become.

  Furthermore, in the present invention, a suspension frame that supports the precast concrete member in a suspended manner is used, and the suspension frame includes a suspension frame body that is suspended by the crane, and the precast that is disposed below the suspension frame body. A suspension tool for supporting a concrete member on the suspension frame main body, and a height adjustable support leg projecting downward at a position aligned with the pile insertion portion of the suspension frame body. The height of the pile head and the precast concrete member is adjusted by adjusting the height of the support leg portion while supporting the portion on the top surface of the pile head and supporting the suspension frame on the pile. By doing so, it is possible to stably hold the precast concrete member on the pile, so that it is not easily affected by sea conditions and weather conditions. The position of the catcher strike concrete member can be easily adjusted.

  In the precast concrete member pile head support structure according to the present invention, as described above, when the precast concrete member is joined to the pile head, the precast concrete member is temporarily supported on the pile head via the joint support member. In the pile head support structure of a precast concrete member, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile head In a state where the position of the precast concrete member with respect to the pile is fixed, the pile side support is movable relative to the member side support in the pile axial direction and the pile radial direction, and is fixed to the outer peripheral surface of the pile head. And a coupling means for rigidly coupling the pile side support and the member side support, the pile head and the precast concrete When adjusting the relative position with the material, the relative position of the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position By allowing rigid connection, the precast concrete member can be easily adjusted to the pile head when the precast concrete member is joined to the pile and a structure such as a pier is constructed. The concrete member can be temporarily supported.

(A) is a top view which shows an example of the structure by which the precast concrete member was joined to the pile head by this invention, (b) is the XX sectional drawing. (A) is a top view which shows an example of the precast concrete member in FIG. 1, (b) is a YY sectional view which shows the same pile insertion part part. (A) is a front view which shows the member side support tool in FIG. 2, (b) is the side view. (A) is a front view which shows the pile side support tool same as the above, (b) is the side view. It is sectional drawing for demonstrating the transfer process of the precast concrete member in the pile head joining method of the precast concrete member which concerns on this invention. It is sectional drawing for demonstrating a suspension frame installation same as the above, and a height adjustment process. It is an expanded sectional view which shows the pile insertion part part in FIG. It is an enlarged plan view which shows the state which supported the precast concrete member on the pile head same as the above. It is sectional drawing which shows the other Example of the pile head joining method of the precast concrete member which concerns on this invention.

  Next, embodiments of the pile head joining method and the pile head support structure for precast concrete members according to the present invention will be described based on the embodiments shown in FIGS.

  In this embodiment, the construction of the pier will be described as an example. In the figure, symbol A is a structure such as a pier, symbol B is a water surface, symbol 1 is a pile, symbol 2 is a beam spanned between the piles 1 and 1. It is the precast concrete member which comprises a part.

  In constructing this structure A, after placing a plurality of piles 1, 1... On the bottom of the water in a predetermined arrangement, the precast concrete member 2 manufactured in advance in a factory or an onshore production yard is carried in. The precast concrete member 2 is temporarily supported by the pile heads 1a of the piles 1, 1.

  Then, by placing concrete 4 between the precast concrete member 2 and the pile head 1a in a temporarily supported state, the precast concrete member 2 and the pile head 1a are joined to each other, the piles 1, 1,. And the beam portion made of the precast concrete member 2 are integrated.

  Pile 1,1 ... is a steel pipe pile comprised by the cylindrical steel pipe, Comprising: The upper end part is driven to a bottom bottom ground to a desired penetration depth so that the upper end part may protrude on the water surface B.

  As shown in FIG. 2, the precast concrete member 2 includes a pair of precast concrete main beam members 5 and 5 arranged in parallel to each other and a precast concrete cross beam spanned between the main beam members 5 and 5. The pile insertion part 7 which was provided with the members 6 and 6 and penetrated up and down where the pile head 1a is inserted in the part which the main beam members 5 and 5 and the cross beam members 6 and 6 cross | intersect is formed.

  This precast concrete member 2 transports the precast concrete main beam members 5 and 5 and the transverse beam members 6 and 6 separately manufactured at the factory to the land near the pier, where the main beam member 5 and the transverse beam member 6 are transferred. Are connected by a joint device for mold form 8.

  Each of the main beam members 5 and 5 is formed in a rectangular parallelepiped shape made of reinforced concrete and has a recessed portion 7a for a notched pile insertion portion whose top and bottom and side surfaces are opened at positions aligned with the lateral beam members 6 and 6 on one side thereof. Are provided in parallel, with the recesses 7a for pile insertion portions facing each other.

  Further, reinforcing bars 9, 9 ... are embedded in the main beam members 5, 5 in the longitudinal direction and the short direction, and the inner side surface of the recess 7a for pile insertion portion is provided in each reinforcing bar 9, 9 ... The mechanical joint 10 is fixed to the exposed part.

  Each of the transverse beam members 6 and 6 is formed in a reinforced concrete rectangular parallelepiped shape, and is between the main beam members 5 and 5 in a position aligned with the concave portion 7a for the pile insertion portion. It is arranged to face.

  Further, in each of the cross beam members 6 and 6, reinforcing bars 9, 9 ... are embedded in the longitudinal direction, and at both ends of each of the reinforcing bars 9, 9 ..., that is, at end surfaces of the cross beam members 6 and 6, respectively. The mechanical joint 10 is fixed.

  The joint for both formwork 8 is made of a steel material, and includes a flat plate-like connector main body 11 and a pair of attachment pieces 12 that extend obliquely from both side ends of the connector main body 11 and are perpendicular to each other. 12.

  In this mold and joint coupler 8, each of the mounting pieces 12, 12 is fixed to the side opening edge of the pile insertion portion recess 7a of the main beam member 5 and the side surface of the cross beam member 6 with bolts 13, 13, respectively. The main beam member 5 and the cross beam member 6 are connected to each other, and the connector main body 11 constitutes a partial inner wall of the pile insertion portion 7 and functions as a formwork when placing concrete 4.

  In addition, the formwork / connector 8 is integrally provided with reinforcing pieces 14, 14 for connecting the two attachment pieces 12, 12 on the back surface of the connector body 11, so that the main beam members 5, 5 and the horizontal beam members are connected. The shear strength of 6 and 6 is enhanced.

  The pile insertion part 7 is formed in the shape of an octagonal hole penetrating vertically by the inner surface of the pile insertion part recess 7a of the main beam members 5, 5 and the end faces of both the formwork / connector 8 and the transverse beam members 6, 6. The pile head 1a is inserted into the inside.

  The joint support member 3 is fixed to the inner side surface of the pile insertion portion 7, that is, the surface facing the outer peripheral surface of the pile head 1a of the precast concrete member 2, and the joint support member 3 is fixed to the pile head 1a. Thus, the precast concrete member 2 is temporarily supported by the piles 1, 1.

  In the pile head support structure of the precast concrete member, the joint support member 3 is fixed to a member side support tool 15 fixed to a surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, and the member side support tool 15 On the other hand, it is comprised with the pile side support 16 which can be relatively moved in a pile axial direction and a pile radial direction, and can be fixed to the outer peripheral surface of the pile head 1a.

  In addition, the joining support member 3 includes a coupling means for rigidly coupling the member side support 15 and the pile side support 16 at a desired position.

  As shown in FIG. 3, the member-side support 15 includes a flat plate-shaped mounting plate 15a made of a steel plate, and a flat plate-shaped joining plate 15b made of a steel plate whose side ends project vertically from the surface of the mounting plate 15a. The mounting plate 15a and the joining plate 15b form a T shape in plan view.

  The mounting plate 15a is formed with a plurality of bolt insertion holes 17, 17 ... penetrating in the plate thickness direction on both sides of the joining plate 15b, and bolts 18 passed through the bolt insertion holes 17, 17 ... Nut embedded in the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner surface of the recess 7a for the pile insertion portion of the main beam members 5 and 5 and the end surfaces of the transverse beam members 6 and 6 ( The member-side support 15 is firmly fixed to the surface of the precast concrete member 2 that faces the outer peripheral surface of the pile head 1a.

  The joining plate 15b has a plurality of bolt insertion holes 19, 19 penetrating in the plate thickness direction at intervals in the vertical direction, and a length penetrating in the plate thickness direction toward the horizontal (short side) disposed at the lower end. A hole-shaped welding hole 20 is formed.

  As shown in FIG. 4, the pile-side support 16 is formed in a flat plate shape made of a steel plate, and one side edge can be firmly fixed to the pile head 1 a by welding or the like.

  The pile-side support 16 has a plurality of elongated bolt insertion holes 21 and 21 that are horizontally (short) penetrating in the plate thickness direction and horizontally (short) arranged at the upper end. A long hole-like welding hole 22 is formed.

  The coupling means is not particularly limited as long as the member-side support 15 and the pile-side support 16 can be rigidly coupled, but in this embodiment, the bolt 23 penetrated through the joining plate 15b and the pile-side support 16 is used. And the welding using the welding holes 20 and 22 are used in combination.

  Since the joining plate 15b of the member-side support 15 and the pile-side support 16 are flat each other, the joining support member 3 moves relative to each other when the positions of the pile head 1a and the precast concrete member 2 are adjusted. Further, the bolts 23 are passed through the bolt insertion holes 19, 19 of the member side support 15 and the bolt insertion holes 21, 21 of the pile side support 16 so as to be supported by the member side support 15. The tool 16 can also be slidably supported in the horizontal direction.

  Therefore, in this pile head support structure of a precast concrete member, when adjusting the relative position of the pile head 1a and the precast concrete member 2, the relative position of the member side support tool 15 and the pile side support tool 16 is adjusted. In addition, the member-side support 15 and the pile-side support 16 can be rigidly connected at the adjusted position, and the adjusted position can be maintained.

  Next, a specific procedure of the pile head joining method for the precast concrete member using the support structure as described above will be described.

  First, on the land near the construction site, the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 respectively manufactured in advance at a factory or the like are carried into the land portion near the construction site, as shown in FIG. In addition, the main beam members 5 and 5 and the cross beam members 6 and 6 are connected by the formwork / connector 8 to assemble the precast concrete member 2.

  At that time, the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner peripheral surface of the main beam members 5 and 5 and the recessed portion 7a for the pile insertion portion, and the end surface of the transverse beam members 6 and 6, respectively The member side support 15 of the support member 3 is attached.

  In addition, the pile side support tool 16 is in a state of being removed from the member side support tool 15, or is in a state of being temporarily fixed to the member side support tool 15 so as to be slidable by bolting in advance. It is in a state in which it can move relative to the side support 15.

  Next, as shown in FIG. 5, the assembled precast concrete member 2 is attached to the suspension frame 30 and is lifted by a crane ship or a crane installed on land. In the figure, reference numeral 31 is a sling wire, and reference numeral 32 is a wire fed from a crane.

  The suspension frame 30 to be used includes a suspension frame main body 33 suspended by a crane, suspension tools 34, 34 ... for supporting the precast concrete member 2 disposed below the suspension frame main body 33 on the suspension frame main body 33, and suspension. .. Are provided with adjustable height supporting legs 35, 35... Projecting downward at a position aligned with the pile insertion portion 7 of the frame main body 33. So that you can hold it.

  Each support leg 35, 35... Has a telescopic movable part 36 whose upper end is fixed to the suspension frame main body 33, a lower leg part 37 fixed to the lower end of the movable part 36, and the height of the movable part 36. And a height adjustment jack 38 for adjusting the height of the support leg 35 and the height of the support leg 35 can be adjusted by operating the height adjustment jack 38.

  Then, as shown in FIG. 5, the precast concrete member 2 is lifted and transferred via a suspension frame 30 by a crane ship or a crane installed on land, and as shown in FIG. The pile head 1a is inserted into the pile insertion portion 7 and the supporting leg portions 35, 35... Of the suspension frame 30 are placed on the top surface of the pile head 1a.

  In this state, as shown in FIGS. 6 and 7, the suspension frame 30 is supported by the piles 1, 1... Via the respective support legs 35, 35. In both cases, the precast concrete member 2 suspended and supported under the suspension frame 30 is stably held in a state where the pile head 1 a is inserted into the pile insertion portion 7.

  At this time, the pile-side support 16 of the joint support member 3 is not yet fixed to the outer peripheral surface of the pile head 1a, and the relative height of the joint support member 3 to the pile head 1a, that is, the pile of the precast concrete member 2 The relative position with respect to the head 1a can be freely adjusted.

  Then, in this state, the height adjustment jacks 38 of the respective support legs 35, 35... Are operated so that the positions of the respective reinforcing bars 9, 9. The height of the precast concrete member 2 with respect to the part 1a is adjusted.

  When the height adjustment of the precast concrete member 2 with respect to the pile head 1a is completed, the pile-side support 16 is then slid with respect to the member-side support 15 to adjust its relative position. Are brought into contact with the outer peripheral surface of the pile head 1a.

  Then, in this state, the coupling bolt that is passed through the joining plate 15b and the pile-side support 16 is tightened, and the pile-side support 16 and the member-side support 15 are welded using the welding holes 20 and 22. The joining plate 15b and the pile side support 16 are rigidly connected, and the side edge of the pile side support 16 is welded to the outer peripheral surface of the pile head 1a.

  Thereby, the precast concrete member 2 will be in the state supported by the pile 1,1, ... via the joining support member 3, and it will become possible to remove the suspension frame 30 from the precast concrete member 2. FIG.

  Next, as shown in the broken line in FIG. 7 and FIG. 8, the pile head 1 a of each pile 1, 1... Is aligned with the position of each rebar 9, 9. Reinforcing the reinforcing bars 40, 40 ... and welding the reinforcing bar receiving plates 41, 41 ... so as to support the lower surface of the pile-side reinforcing bars 40, 40 ... on the outer peripheral surface of the pile head 1a. The pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bars 9, 9 ... embedded in the precast concrete member 2 via the mechanical joint 10, and the pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bar receiving plate. Weld to 41.

  Then, the suspension frame 30 is removed from the precast concrete member 2 and removed, and the precast concrete member 2 is supported by the piles 1, 1.

  Next, the lower surface side opening of the pile insertion part 7 is closed by the bottom formwork material 42, and the concrete 4 is placed in each pile insertion part 7 in that state, and the concrete 4 is cured and solidified. The head 1a and the precast concrete member 2 are joined, and each pile 1,1 ... and the precast concrete member 2 are integrated.

  Since the main beam members 5 and 5 and the cross beam members 6 and 6 constituting the precast concrete member 2 are integrated through the cast concrete, as shown in FIG. Can be removed, and the removed combined mold / connector 8 can be used elsewhere.

  Then, a series of operations shown in FIGS. 5 to 8 are repeated as necessary to form a structure in which the beam portion made of the precast concrete member 2 is integrated with the pile head 1a. A floor slab is formed on the top using cast-in-place concrete or precast, and a pier is constructed.

  In the pile head joining method of the precast concrete member configured as described above, the member side support tool 15 and the pile side support tool 16 constituting the joining support member 3 can be moved relative to each other, and both of them can be joined by a coupling means. Because the structure can be rigidly connected, the relative position of the precast concrete member 2 with respect to the pile head 1a can be adjusted for each pile 1, 1. Therefore, the construction cost and construction period can be reduced accordingly.

  Moreover, in this pile head 1a joining method, while using the suspension frame 30 as shown in the figure, the precast concrete member 2 can be stably held by each pile 1, 1,. Height adjustment is possible for each part 35, 35 ....

  In the above-described embodiment, the precast concrete member 2 in which the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 are connected to each other by the formwork coupler 8 is described as an example. The aspect of 2 is not limited to this, For example, you may apply this invention by making the main beam members 5 and 5 or the cross beam members 6 and 6 into the independent precast concrete member 2, respectively.

  Moreover, in the above-mentioned Example, although the member side support tool 15 of the joining support member 3 was attached when assembling the precast concrete member 2, the precast concrete member 2 was installed in the pile head 1a at the time of the attachment. Or after adjusting the relative position of the precast concrete member 2 with respect to the pile head 1a.

  Furthermore, although the above-mentioned Example demonstrated the case where after adjusting the relative position of the pile side support tool 16 with respect to the member side support tool 15, the pile side support tool 16 was welded to the outer periphery of the pile head 1a, FIG. The pile side support 16 is welded to the outer periphery of the pile head 1a in advance, and the member side support 15 is adjusted while adjusting the relative position of the pile head 1a and the precast concrete member 2 in this state. It is also possible to adjust the relative position between the pile side support 16 and the member side support 15 and the pile side support 16 after that.

DESCRIPTION OF SYMBOLS 1 Pile 2 Precast concrete member 3 Joining support member 5 Main beam member 6 Cross beam member 7 Pile insertion part 7a Pile insertion part recessed part 8 Formwork combined connection tool 9 Reinforcement 10 Mechanical joint 11 Connection tool main body 12 Attachment piece 13 Bolt 14 Reinforcement piece 15 member side support 15a mounting plate 15b joint plate 16 pile side support 17 bolt insertion hole 18 bolt 19 bolt insertion hole 20 welding hole 21 bolt insertion hole 22 welding hole 30 hanging frame 31 sling wire 32 wire 33 hanging frame main body 34 Lifting tool 35 Supporting leg part 36 Movable part 37 Lower leg part 38 Height adjusting jack 40 Pile side reinforcing bar 41 Reinforcing bar receiving plate 42 Form material for bottom

  In the construction of a structure such as a pier in which a beam is supported by a plurality of piles, the present invention mainly applies the precast concrete member to the pile head when joining the precast concrete member and the pile head constituting the beam. The present invention relates to a pile head joining method of a precast concrete member to be supported and a pile head support structure.

  Conventionally, a structure with a beam supported by multiple piles such as a pier, after placing each pile on the bottom of the water, etc., constructing a steel frame between these adjacent piles, arranging reinforcing bars, etc. Forms were formed between the piles using the supported support works, and beams were formed by casting the concrete in the field, and the beams and the pile heads were joined.

  However, in such a construction method, the beam is made of cast-in-place concrete, so installation of work scaffoldings and supporters for each work, placement of reinforcing bars and steel frames, assembly / disassembly of formwork, placement of concrete, All work such as curing had to be performed at the construction site, and there was a problem that the influence of sea conditions and weather conditions was great and the construction period was prolonged.

  In view of such problems, conventionally, one or a plurality of precast concrete members constituting a beam are manufactured in advance in an on-site factory or production yard, which is transported to a construction site and installed on a crane ship or on land. The crane is lifted by a crane and the precast concrete member is installed on the pile head, and the concrete is placed between the pile head and the precast concrete member in that state, so that the beam is joined to the pile head. Is used (see, for example, Patent Document 1).

  In this type of construction method, a pre-cast concrete member is provided with a through-hole into which a pile head is inserted, and a support member such as a steel frame is projected from the inner peripheral surface of the through-hole. The lower surface of the pile is received by a bracket projecting on the upper surface of the pile or the outer peripheral surface of the pile, and the precast concrete member is temporarily supported on the pile. It was like that.

Japanese Patent Laid-Open No. 8-100144

  However, in the conventional technology as described above, since the support member of the precast concrete member is supported by a bracket fixed to the upper surface portion of the pile or the outer peripheral surface of the pile head, the precast concrete member is installed at a desired height. In order to achieve this, the pile upper surface or bracket height that supports the support member of each pile must match, and therefore, it is necessary to install each pile or bracket with high accuracy, which is complicated and costly. In addition, there is a problem that the construction period increases.

  Moreover, in joining such a precast concrete member and a pile head, in order to compensate for the shortage of the embedding length with respect to the pile head moment, the reinforcing bar embedded in the precast member is directly or via a fixing plate to the pile head. There are many cases where joining is required by welding or the like.

  In that case, in the conventional technique, since the installation position of the reinforcing bar embedded in the precast concrete member is determined by the relative position to the support member, each pile or bracket has a higher accuracy in consideration of the reinforcing bar position. There is a problem that installation is required, and there is a problem that it is difficult to respond flexibly to design changes.

  Therefore, in view of such a conventional problem, the present invention can easily align the pile head and the precast concrete member, and can reduce the construction cost and the construction period. The purpose is to provide a joining method and a pile head support structure.

The feature of the invention according to claim 1 for solving the conventional problems as described above is that a precast concrete member is supported on a pile head and concrete is placed between the pile head and the precast concrete member in that state. In the pile head joining method of a precast concrete member that joins the pile head and the precast concrete member, a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member And, in a state where the position of the precast concrete member with respect to the pile head is fixed, relative movement is possible in the pile axial direction and the pile radial direction with respect to the member side support tool, and is fixed to the outer peripheral surface of the pile head. a pile side support possible, joint supporting comprising a coupling means for coupling rigidly and with該杭side support said member side support in the desired position Material, and adjusting the relative position of the pile head and the precast concrete member, and after adjusting the relative position of the member side support tool and the pile side support tool, the pile side support tool and the A member-side support is rigidly connected, and the precast concrete member is supported by the pile head via the joint support member, and in that state, the concrete is filled between the pile head and the precast concrete member. in pile head bonding method of precast concrete member.

  The feature of the invention according to claim 2 is that, in addition to the configuration of claim 1, the relative position of the pile head and the precast concrete member is adjusted, and the relative of the pile side support to the member side support After adjusting a position, it exists in fixing the said pile side support tool to the said pile head.

  The invention according to claim 3 is characterized in that, in addition to the structure of claim 1, the pile-side support is fixed in advance to the outer periphery of the pile head, and the pile head and the precast concrete member are in that state. The relative position between the member side support tool and the pile side support tool is adjusted while adjusting the relative position between the pile side support tool and the member side support tool. .

According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame is suspended from a crane. A suspended frame body, a hanging tool for supporting the precast concrete member arranged below the suspended frame body on the suspended frame body, and a downwardly aligned position to a pile insertion portion of the precast concrete member of the suspended frame body A height-adjustable support leg projecting from the top of the pile head, the support leg is supported on the top of the pile head, the suspension frame is supported on the pile head, and the height of the support leg is By adjusting the height, the relative height between the pile head and the precast concrete member is adjusted.

The feature of the invention according to claim 5 for solving the conventional problem as described above is that when the precast concrete member is joined to the pile head, the precast concrete member is connected to the pile head via a joint support member. In the pile head support structure of a precast concrete member that is temporarily supported, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile In the state where the position of the precast concrete member with respect to the head is fixed, the pile side that is movable relative to the member-side support tool in the pile axial direction and the pile radial direction and fixed to the outer peripheral surface of the pile head A support means, and a coupling means for rigidly connecting the pile side support tool and the member side support tool at a desired position, and the pile head and the precast concrete When adjusting the relative position with the G member, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position It is in the pile head support structure of the precast concrete member that can be rigidly connected.

The pile head joining method of the precast concrete member according to the present invention, as described above, allows the pile head to support the precast concrete member, and in that state, the concrete is filled between the pile head and the precast concrete member. In the pile head joining method of the precast concrete member for joining the pile head and the precast concrete member, a member-side support fixed to the surface facing the pile head outer peripheral surface of the precast concrete member, In a state where the position of the precast concrete member with respect to the pile head is fixed, it can be moved relative to the member-side support tool in the pile axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head. a pile side support, coupling means and a該杭side support said member side support rigidly attached at a desired position and Tona A joint support member is used to adjust the relative position between the pile head and the precast concrete member, and after adjusting the relative position between the member side support tool and the pile side support tool, the pile side support tool And the member-side support are rigidly connected, and the pile head is supported by the precast concrete member via the joint support member, and in that state, the concrete is placed between the pile head and the precast concrete member. Since the relative position of the precast concrete member with respect to the pile head can be adjusted for each pile by filling the pile head, high accuracy is not required during pile installation, and the pile installation work is facilitated accordingly. Can be reduced.

  Moreover, in this invention, while adjusting the relative position of the said pile head and the said precast concrete member, after adjusting the relative position of the said pile side support tool with respect to the said member side support tool, the said pile side support tool is said By fixing to the pile head, the position adjustment of the precast concrete member with respect to the pile head becomes easy.

  Furthermore, in this invention, the said pile side support tool is previously fixed to the outer periphery of the said pile head, and the said member side support is adjusted, adjusting the relative position of the said pile head and the said precast concrete member in that state. By adjusting the relative position of the tool and the pile-side support tool, and then rigidly connecting the pile-side support tool and the member-side support tool, the precast concrete member can be easily aligned with the pile head. Become.

Furthermore, in the present invention, a suspension frame that suspends and supports the precast concrete member is used, and the suspension frame includes a suspension frame body that is suspended by a crane, and the precast concrete disposed below the suspension frame body. A suspension tool for supporting the member on the suspension frame body, and a height-adjustable support leg projecting downward at a position aligned with the pile insertion portion of the precast concrete member of the suspension frame body, The support leg is supported on the top of the pile head, the suspension frame is supported on the pile head, and the height of the support leg is adjusted to adjust the relative height between the pile head and the precast concrete member. By adjusting the height, it is possible to stably hold the precast concrete member on the pile, so it is not easily affected by sea conditions and weather conditions. The position of the precast concrete parts for the pile head of each pile can be easily adjusted.

As described above, the pile head support structure for a precast concrete member according to the present invention temporarily supports the precast concrete member via the joint support member when the precast concrete member is joined to the pile head. In the pile head support structure of a precast concrete member, the joint support member is a member-side support fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the pile head In a state where the position of the precast concrete member with respect to the pile is fixed, the pile side support is movable relative to the member side support in the pile axial direction and the pile radial direction, and is fixed to the outer peripheral surface of the pile head. And a coupling means for rigidly coupling the pile side support and the member side support at a desired position, the pile head and the precast When adjusting the relative position with the concrete member, the relative position between the member side support tool and the pile side support tool can be adjusted, and the member side support tool and the pile side support tool at the adjusted position By connecting the precast concrete member to the pile and constructing a structure such as a pier, the position of the precast concrete member can be easily adjusted with respect to the pile head. A precast concrete member can be temporarily supported.

(A) is a top view which shows an example of the structure by which the precast concrete member was joined to the pile head by this invention, (b) is the XX sectional drawing. (A) is a top view which shows an example of the precast concrete member in FIG. 1, (b) is a YY sectional view which shows the same pile insertion part part. (A) is a front view which shows the member side support tool in FIG. 2, (b) is the side view. (A) is a front view which shows the pile side support tool same as the above, (b) is the side view. It is sectional drawing for demonstrating the transfer process of the precast concrete member in the pile head joining method of the precast concrete member which concerns on this invention. It is sectional drawing for demonstrating a suspension frame installation same as the above, and a height adjustment process. It is an expanded sectional view which shows the pile insertion part part in FIG. It is an enlarged plan view which shows the state which supported the precast concrete member on the pile head same as the above. It is sectional drawing which shows the other Example of the pile head joining method of the precast concrete member which concerns on this invention.

  Next, embodiments of the pile head joining method and the pile head support structure for precast concrete members according to the present invention will be described based on the embodiments shown in FIGS.

  In this embodiment, the construction of the pier will be described as an example. In the figure, symbol A is a structure such as a pier, symbol B is a water surface, symbol 1 is a pile, symbol 2 is a beam spanned between the piles 1 and 1. It is the precast concrete member which comprises a part.

  In constructing this structure A, after placing a plurality of piles 1, 1... On the bottom of the water in a predetermined arrangement, the precast concrete member 2 manufactured in advance in a factory or an onshore production yard is carried in. The precast concrete member 2 is temporarily supported by the pile heads 1a of the piles 1, 1.

  Then, by placing concrete 4 between the precast concrete member 2 and the pile head 1a in a temporarily supported state, the precast concrete member 2 and the pile head 1a are joined to each other, the piles 1, 1,. And the beam portion made of the precast concrete member 2 are integrated.

  Pile 1,1 ... is a steel pipe pile comprised by the cylindrical steel pipe, Comprising: The upper end part is driven to a bottom bottom ground to a desired penetration depth so that the upper end part may protrude on the water surface B.

  As shown in FIG. 2, the precast concrete member 2 includes a pair of precast concrete main beam members 5 and 5 arranged in parallel to each other and a precast concrete cross beam spanned between the main beam members 5 and 5. The pile insertion part 7 which was provided with the members 6 and 6 and penetrated up and down where the pile head 1a is inserted in the part which the main beam members 5 and 5 and the cross beam members 6 and 6 cross | intersect is formed.

  This precast concrete member 2 transports the precast concrete main beam members 5 and 5 and the transverse beam members 6 and 6 separately manufactured at the factory to the land near the pier, where the main beam member 5 and the transverse beam member 6 are transferred. Are connected by a joint device for mold form 8.

  Each of the main beam members 5 and 5 is formed in a rectangular parallelepiped shape made of reinforced concrete and has a recessed portion 7a for a notched pile insertion portion whose top and bottom and side surfaces are opened at positions aligned with the lateral beam members 6 and 6 on one side thereof. Are provided in parallel, with the recesses 7a for pile insertion portions facing each other.

  Further, reinforcing bars 9, 9 ... are embedded in the main beam members 5, 5 in the longitudinal direction and the short direction, and the inner side surface of the recess 7a for pile insertion portion is provided in each reinforcing bar 9, 9 ... The mechanical joint 10 is fixed to the exposed part.

  Each of the transverse beam members 6 and 6 is formed in a reinforced concrete rectangular parallelepiped shape, and is between the main beam members 5 and 5 in a position aligned with the concave portion 7a for the pile insertion portion. It is arranged to face.

  Further, in each of the cross beam members 6 and 6, reinforcing bars 9, 9 ... are embedded in the longitudinal direction, and at both ends of each of the reinforcing bars 9, 9 ..., that is, at end surfaces of the cross beam members 6 and 6, respectively. The mechanical joint 10 is fixed.

  The joint for both formwork 8 is made of a steel material, and includes a flat plate-like connector main body 11 and a pair of attachment pieces 12 that extend obliquely from both side ends of the connector main body 11 and are perpendicular to each other. 12.

  In this mold and joint coupler 8, each of the mounting pieces 12, 12 is fixed to the side opening edge of the pile insertion portion recess 7a of the main beam member 5 and the side surface of the cross beam member 6 with bolts 13, 13, respectively. The main beam member 5 and the cross beam member 6 are connected to each other, and the connector main body 11 constitutes a partial inner wall of the pile insertion portion 7 and functions as a formwork when placing concrete 4.

  In addition, the formwork / connector 8 is integrally provided with reinforcing pieces 14, 14 for connecting the two attachment pieces 12, 12 on the back surface of the connector body 11, so that the main beam members 5, 5 and the horizontal beam members are connected. The shear strength of 6 and 6 is enhanced.

  The pile insertion part 7 is formed in the shape of an octagonal hole penetrating vertically by the inner surface of the pile insertion part recess 7a of the main beam members 5, 5 and the end faces of both the formwork / connector 8 and the transverse beam members 6, 6. The pile head 1a is inserted into the inside.

  The joint support member 3 is fixed to the inner side surface of the pile insertion portion 7, that is, the surface facing the outer peripheral surface of the pile head 1a of the precast concrete member 2, and the joint support member 3 is fixed to the pile head 1a. Thus, the precast concrete member 2 is temporarily supported by the piles 1, 1.

  In the pile head support structure of the precast concrete member, the joint support member 3 is fixed to a member side support tool 15 fixed to a surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, and the member side support tool 15 On the other hand, it is comprised with the pile side support 16 which can be relatively moved in a pile axial direction and a pile radial direction, and can be fixed to the outer peripheral surface of the pile head 1a.

  In addition, the joining support member 3 includes a coupling means for rigidly coupling the member side support 15 and the pile side support 16 at a desired position.

  As shown in FIG. 3, the member-side support 15 includes a flat plate-shaped mounting plate 15a made of a steel plate, and a flat plate-shaped joining plate 15b made of a steel plate whose side ends project vertically from the surface of the mounting plate 15a. The mounting plate 15a and the joining plate 15b form a T shape in plan view.

  The mounting plate 15a is formed with a plurality of bolt insertion holes 17, 17 ... penetrating in the plate thickness direction on both sides of the joining plate 15b, and bolts 18 passed through the bolt insertion holes 17, 17 ... Nut embedded in the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner surface of the recess 7a for the pile insertion portion of the main beam members 5 and 5 and the end surfaces of the transverse beam members 6 and 6 ( The member-side support 15 is firmly fixed to the surface of the precast concrete member 2 that faces the outer peripheral surface of the pile head 1a.

  The joining plate 15b has a plurality of bolt insertion holes 19, 19 penetrating in the plate thickness direction at intervals in the vertical direction, and a length penetrating in the plate thickness direction toward the horizontal (short side) disposed at the lower end. A hole-shaped welding hole 20 is formed.

  As shown in FIG. 4, the pile-side support 16 is formed in a flat plate shape made of a steel plate, and one side edge can be firmly fixed to the pile head 1 a by welding or the like.

  The pile-side support 16 has a plurality of elongated bolt insertion holes 21 and 21 that are horizontally (short) penetrating in the plate thickness direction and horizontally (short) arranged at the upper end. A long hole-like welding hole 22 is formed.

  The coupling means is not particularly limited as long as the member-side support 15 and the pile-side support 16 can be rigidly coupled, but in this embodiment, the bolt 23 penetrated through the joining plate 15b and the pile-side support 16 is used. And the welding using the welding holes 20 and 22 are used in combination.

  Since the joining plate 15b of the member-side support 15 and the pile-side support 16 are flat each other, the joining support member 3 moves relative to each other when the positions of the pile head 1a and the precast concrete member 2 are adjusted. Further, the bolts 23 are passed through the bolt insertion holes 19, 19 of the member side support 15 and the bolt insertion holes 21, 21 of the pile side support 16 so as to be supported by the member side support 15. The tool 16 can also be slidably supported in the horizontal direction.

  Therefore, in this pile head support structure of a precast concrete member, when adjusting the relative position of the pile head 1a and the precast concrete member 2, the relative position of the member side support tool 15 and the pile side support tool 16 is adjusted. In addition, the member-side support 15 and the pile-side support 16 can be rigidly connected at the adjusted position, and the adjusted position can be maintained.

  Next, a specific procedure of the pile head joining method for the precast concrete member using the support structure as described above will be described.

  First, on the land near the construction site, the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 respectively manufactured in advance at a factory or the like are carried into the land portion near the construction site, as shown in FIG. In addition, the main beam members 5 and 5 and the cross beam members 6 and 6 are connected by the formwork / connector 8 to assemble the precast concrete member 2.

  At that time, the surface of the precast concrete member 2 facing the outer peripheral surface of the pile head 1a, that is, the inner peripheral surface of the main beam members 5 and 5 and the recessed portion 7a for the pile insertion portion, and the end surface of the transverse beam members 6 and 6, respectively The member side support 15 of the support member 3 is attached.

  In addition, the pile side support tool 16 is in a state of being removed from the member side support tool 15, or is in a state of being temporarily fixed to the member side support tool 15 so as to be slidable by bolting in advance. It is in a state in which it can move relative to the side support 15.

  Next, as shown in FIG. 5, the assembled precast concrete member 2 is attached to the suspension frame 30 and is lifted by a crane ship or a crane installed on land. In the figure, reference numeral 31 is a sling wire, and reference numeral 32 is a wire fed from a crane.

  The suspension frame 30 to be used includes a suspension frame main body 33 suspended by a crane, suspension tools 34, 34 ... for supporting the precast concrete member 2 disposed below the suspension frame main body 33 on the suspension frame main body 33, and suspension. .. Are provided with adjustable height supporting legs 35, 35... Projecting downward at a position aligned with the pile insertion portion 7 of the frame main body 33. So that you can hold it.

  Each support leg 35, 35... Has a telescopic movable part 36 whose upper end is fixed to the suspension frame main body 33, a lower leg part 37 fixed to the lower end of the movable part 36, and the height of the movable part 36. And a height adjustment jack 38 for adjusting the height of the support leg 35 and the height of the support leg 35 can be adjusted by operating the height adjustment jack 38.

  Then, as shown in FIG. 5, the precast concrete member 2 is lifted and transferred via a suspension frame 30 by a crane ship or a crane installed on land, and as shown in FIG. The pile head 1a is inserted into the pile insertion portion 7 and the supporting leg portions 35, 35... Of the suspension frame 30 are placed on the top surface of the pile head 1a.

  In this state, as shown in FIGS. 6 and 7, the suspension frame 30 is supported by the piles 1, 1... Via the respective support legs 35, 35. In both cases, the precast concrete member 2 suspended and supported under the suspension frame 30 is stably held in a state where the pile head 1 a is inserted into the pile insertion portion 7.

  At this time, the pile-side support 16 of the joint support member 3 is not yet fixed to the outer peripheral surface of the pile head 1a, and the relative height of the joint support member 3 to the pile head 1a, that is, the pile of the precast concrete member 2 The relative position with respect to the head 1a can be freely adjusted.

  Then, in this state, the height adjustment jacks 38 of the respective support legs 35, 35... Are operated so that the positions of the respective reinforcing bars 9, 9. The height of the precast concrete member 2 with respect to the part 1a is adjusted.

  When the height adjustment of the precast concrete member 2 with respect to the pile head 1a is completed, the pile-side support 16 is then slid with respect to the member-side support 15 to adjust its relative position. Are brought into contact with the outer peripheral surface of the pile head 1a.

  Then, in this state, the coupling bolt that is passed through the joining plate 15b and the pile-side support 16 is tightened, and the pile-side support 16 and the member-side support 15 are welded using the welding holes 20 and 22. The joining plate 15b and the pile side support 16 are rigidly connected, and the side edge of the pile side support 16 is welded to the outer peripheral surface of the pile head 1a.

  Thereby, the precast concrete member 2 will be in the state supported by the pile 1,1, ... via the joining support member 3, and it will become possible to remove the suspension frame 30 from the precast concrete member 2. FIG.

  Next, as shown in the broken line in FIG. 7 and FIG. 8, the pile head 1 a of each pile 1, 1... Is aligned with the position of each rebar 9, 9. Reinforcing the reinforcing bars 40, 40 ... and welding the reinforcing bar receiving plates 41, 41 ... so as to support the lower surface of the pile-side reinforcing bars 40, 40 ... on the outer peripheral surface of the pile head 1a. The pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bars 9, 9 ... embedded in the precast concrete member 2 via the mechanical joint 10, and the pile-side reinforcing bars 40, 40 ... are connected to the reinforcing bar receiving plate. Weld to 41.

  Then, the suspension frame 30 is removed from the precast concrete member 2 and removed, and the precast concrete member 2 is supported by the piles 1, 1.

  Next, the lower surface side opening of the pile insertion part 7 is closed by the bottom formwork material 42, and the concrete 4 is placed in each pile insertion part 7 in that state, and the concrete 4 is cured and solidified. The head 1a and the precast concrete member 2 are joined, and each pile 1,1 ... and the precast concrete member 2 are integrated.

  Since the main beam members 5 and 5 and the cross beam members 6 and 6 constituting the precast concrete member 2 are integrated through the cast concrete, as shown in FIG. Can be removed, and the removed combined mold / connector 8 can be used elsewhere.

  Then, a series of operations shown in FIGS. 5 to 8 are repeated as necessary to form a structure in which the beam portion made of the precast concrete member 2 is integrated with the pile head 1a. A floor slab is formed on the top using cast-in-place concrete or precast, and a pier is constructed.

  In the pile head joining method of the precast concrete member configured as described above, the member side support tool 15 and the pile side support tool 16 constituting the joining support member 3 can be moved relative to each other, and both of them can be joined by a coupling means. Because the structure can be rigidly connected, the relative position of the precast concrete member 2 with respect to the pile head 1a can be adjusted for each pile 1, 1. Therefore, the construction cost and construction period can be reduced accordingly.

  Moreover, in this pile head 1a joining method, while using the suspension frame 30 as shown in the figure, the precast concrete member 2 can be stably held by each pile 1, 1,. Height adjustment is possible for each part 35, 35 ....

  In the above-described embodiment, the precast concrete member 2 in which the precast concrete main beam members 5 and 5 and the cross beam members 6 and 6 are connected to each other by the formwork coupler 8 is described as an example. The aspect of 2 is not limited to this, For example, you may apply this invention by making the main beam members 5 and 5 or the cross beam members 6 and 6 into the independent precast concrete member 2, respectively.

  Moreover, in the above-mentioned Example, although the member side support tool 15 of the joining support member 3 was attached when assembling the precast concrete member 2, the precast concrete member 2 was installed in the pile head 1a at the time of the attachment. Or after adjusting the relative position of the precast concrete member 2 with respect to the pile head 1a.

  Furthermore, although the above-mentioned Example demonstrated the case where after adjusting the relative position of the pile side support tool 16 with respect to the member side support tool 15, the pile side support tool 16 was welded to the outer periphery of the pile head 1a, FIG. The pile side support 16 is welded to the outer periphery of the pile head 1a in advance, and the member side support 15 is adjusted while adjusting the relative position of the pile head 1a and the precast concrete member 2 in this state. It is also possible to adjust the relative position between the pile side support 16 and the member side support 15 and the pile side support 16 after that.

DESCRIPTION OF SYMBOLS 1 Pile 2 Precast concrete member 3 Joining support member 5 Main beam member 6 Cross beam member 7 Pile insertion part 7a Pile insertion part recessed part 8 Formwork combined connection tool 9 Reinforcement 10 Mechanical joint 11 Connection tool main body 12 Attachment piece 13 Bolt 14 Reinforcement piece 15 member side support 15a mounting plate 15b joint plate 16 pile side support 17 bolt insertion hole 18 bolt 19 bolt insertion hole 20 welding hole 21 bolt insertion hole 22 welding hole 30 hanging frame 31 sling wire 32 wire 33 hanging frame main body 34 Lifting tool 35 Supporting leg part 36 Movable part 37 Lower leg part 38 Height adjusting jack 40 Pile side reinforcing bar 41 Reinforcing bar receiving plate 42 Form material for bottom

Claims (5)

A pile of precast concrete members, in which a precast concrete member is supported on a pile head, concrete is filled between the pile head and the precast concrete member in that state, and the pile head and the precast concrete member are joined. In the head joining method,
The member-side support that is fixed to the surface of the precast concrete member that faces the outer peripheral surface of the pile head, and the position of the precast concrete member that is fixed with respect to the pile head is fixed to the member-side support. Using a joint support member composed of a pile-side support that can be relatively moved in the axial direction and the pile radial direction, and can be fixed to the outer peripheral surface of the pile head,
While adjusting the relative position of the pile head and the precast concrete member, and after adjusting the relative position of the member side support tool and the pile side support tool, the pile side support tool and the member side support tool, And connecting the pile heads to the pile heads via the joining support members.   While adjusting the relative position of the pile head and the precast concrete member, and adjusting the relative position of the pile side support with respect to the member side support, the pile side support is fixed to the pile head. The pile head joining method of the precast concrete member according to claim 1.   The pile-side support is fixed in advance to the outer periphery of the pile head, and the member-side support and the pile-side support are adjusted while adjusting the relative position of the pile head and the precast concrete member in that state. The pile head joining method of a precast concrete member according to claim 1, wherein the pile side support tool and the member side support tool are rigidly connected after adjusting the relative position with the tool.   A suspension frame that suspends and supports the precast concrete member is used, and the suspension frame body includes a suspension frame body that is suspended by the crane, and the precast concrete member disposed below the suspension frame body. And a height-adjustable support leg projecting downward at a position aligned with the pile insertion portion of the suspension frame body, and the support leg portion is disposed on the top surface of the pile head. And adjusting the relative height between the pile head and the precast concrete member by adjusting the height of the support leg. The pile head joining method of the precast concrete member of any one. In joining the precast concrete member to the pile head, the pile head support structure of the precast concrete member in which the precast concrete member is temporarily supported via the joint support member on the pile head,
In the state where the joint support member is fixed to a surface facing the pile head outer peripheral surface of the precast concrete member, and the position of the precast concrete member with respect to the pile head is fixed, the member A pile-side support that is movable relative to the side support in the pile axial direction and the pile radial direction and that is fixed to the outer peripheral surface of the pile head; and the pile-side support and the member-side support A coupling means for coupling,
When adjusting the relative position between the pile head and the precast concrete member, the relative position between the member-side support and the pile-side support can be adjusted, and the member-side support at the adjusted position. A pile head support structure for a precast concrete member, wherein the pile side support tool can be rigidly coupled.

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