JP2822364B2 - Concrete member joining structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete member joining structure for arranging a plurality of concrete members in a longitudinal direction and joining longitudinal ends of these concrete members.

[0002]

2. Description of the Related Art It is widely practiced to form a concrete structure by arranging a plurality of concrete members in a longitudinal direction and joining the ends of the concrete members to each other. It is used when a concrete structure or the like is divided into a size that can be manufactured in a factory and joined on site. Compared with the case where concrete structures are manufactured by casting concrete on site, factory members can produce concrete members having relatively high dimensional accuracy and excellent concrete strength. Examples of concrete members manufactured in the above include roof girder members such as shed and keeper, which are rock fall prevention structures, arch members of prefabricated shelters, and lid members of waterways and common ditches. A plurality of precast concrete members manufactured in the above are arranged in the length direction at the site, the end faces in the length direction are joined together, and if necessary, the joints at the joints are waterproofed with mortar concrete etc. I have.

[0003]

The above-mentioned concrete members are joined at the site by abutting flat end faces thereof at the site. However, the design dimensions based on which the factory is manufactured depend on the site conditions and the like. In some cases, the length of the concrete member needs to be adjusted due to a difference from the actual construction size, or a slight but dimensional error of the concrete member at the time of factory production. For example, if the length is short, open the gap between the end faces of the joints and place concrete here to adjust it.If the length is long, cut the concrete member. There was a problem that it had to be adjusted and the workability at the site was poor. Also, when waterproofing is performed on the joint, until the joint material such as mortar concrete to be filled hardens,
A formwork or the like must be assembled so that the joint material does not flow down from the joint, which is inferior in workability. Further, even when the concrete members are arranged in a curved line at the site and joined, there is a problem that the processing of the end face in the longitudinal direction which is the joining surface and the construction at the site become complicated.

Therefore, it is possible to adjust the dimensions at the joint.
As a result, JP-A-62-90454 discloses that
At the joint end between the cradle and the panel, a joint is formed,
Joining the missing openings and joining through this overlapping surface
The method of joining precast panels that are fixed by bolts
There is a loose hole type bolt connection in this connection method
Can be used for positioning.

However, in the above-mentioned joining method, a flat
Since the joining surfaces are superimposed, the panel
Need to be aligned in the width direction of the
Without joint bolts, the desired shear strength can be obtained.
No, it can effectively improve the shear strength of the joint
I can't.

Accordingly, the present invention provides a method of arranging a plurality of concrete members in the length direction, making it possible to easily adjust the overall length of these members, to easily position them in the width direction, and to provide a joint at the joint.
Concrete members that can improve shear strength
It is intended to provide a joint structure.

[0007]

SUMMARY OF THE INVENTION The present invention is directed to a longitudinal projection.
In a concrete member joining structure in which a plurality of concrete members having formed portions are arranged in the length direction and these longitudinal ends of the concrete members are joined to each other, the concrete members are overlapped with the longitudinal ends of the concrete members. , Rutotomoni provided lower <br/> portion, one to the longitudinal ends of the raised portion
For ridges that are inserted into the other ridge and overlap each other
The upper and lower sections are respectively provided continuously to the upper and lower sections,
The tip of the upper portion and the upper portion for the raised portion and the lower portion and
Fill the joint with the lower part for the raised part and insert it in the length direction.
The plurality of concrete members are lengthened by the passed PC steel.
It is one that is tensioned and united in the vertical direction .

[0008]

[Action] arranging a plurality of concrete members in the longitudinal direction, on the adjacent, by adjusting the overlapping margin of the lower step portion, it is possible to adjust the length of a plurality of concrete members. In the raised portion, one of the upper and lower steps for the raised portion is used.
Is inserted into the other ridge and inserted in the width direction of the concrete member.
Is adjusted. In addition, at the joint,
Since the lower part of the ground is closed by the lower part,
There is no need for a formwork to be provided below the joint for the work. Also, joints
After hardening of the material, multiple concrete
Sheet members can be integrated and overlapped
In addition, the joints of the concrete members
And the shear strength of the joint is improved.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings.
explain. 1 to 4 show a first embodiment of the present invention.
This is an example in which the present invention is applied to a shed.
Made of high-strength concrete 1 and made of unpounded PC steel 2
Prestressed conc, a strained concrete member
A large number of reed arch type unit plates 3 are manufactured at a factory. This
Of the arch-shaped unit plate 3 has a raised portion 4 directed in a curved direction.
Multiple protrusions are formed on the outer surface over the entire length, and on the inner and outer surfaces
It has a large number of flat surfaces 5a and has a curved or longitudinal section.
A polyhedron 5 whose surface shape is polygonal is formed,
The unbonded PC steel material 2 is buried in the bent portion 4 in the bending direction.
And tensioned by post tension, both ends not shown
It is established by nuts. In the length direction,
A plurality of raised portions 6 are formed on the outer surface side over a long period, and the raised portions 6 are formed.
A duct 7 is formed in the raised portion 6. The pair of left and right
The tops of the arched unit plates 3, 3 are tightened by the connecting member 8.
Tie. At the longitudinal end of the arched unit plate 3
As shown in FIG. 1, the upper and lower steps 9,
10 are formed, and the upper and lower steps 9 and 10 are mutually
Have overlapping surfaces 9A and 10A. Ma
In the raised portion 6 having a substantially trapezoidal cross section, the lower portion 10 side
End of the ridge 6The lower part 10R for the raised part
At the end of the raised portion 6 on the upper step 9 side.
An upper portion 9R for the raised portion is provided, and the lower portion 10R for the raised portion is provided.
Has a similar trapezoidal shape smaller than the raised portion 6,
Consists of a small trapezoidOf the lower portion 10R for the raised portion
Inserting the 10A portion of the overlapping surface and overlapping the same shape
9A, On the upper step 9R for the raised portionFormed, ie
The overlapping portions of the raised portions 6 will be described later.7Upside down
It has a shaped shape.Also, the lower portion 10R for the raised portion is provided.
Is provided to be continuous with the lower portion 10 and the upper portion for the raised portion is provided.
The portion 9 </ b> R is provided continuously to the upper portion 9.

In joining the pair of arch-shaped unit plates 3 and 3 having their tops joined in the longitudinal direction, the arch-shaped unit plates 3 and 3 that are adjacent in the longitudinal direction are connected to the upper and lower steps 9 and 10. The length of the length is adjusted by adjusting the overlap margin K. Further, a joint material 11 such as mortar concrete is filled between the outer joints and the end surfaces of the raised portions 6 which are the recesses surrounded by the tip end surface of the upper step portion 9 and the lower step portion 10, and waterproofing of the joint is performed. After the joint material 11 has hardened, it is inserted into the duct 7.
It is tensioned and integrated by the penetrating lengthwise transverse tightening PC steel material 12 to form an arched structure. The lower end 13 of the arch structure is embedded and fixed in the foundation 14.

As described above, in the present embodiment , the bulges
In a concrete member joining structure in which the arch-shaped unit plates 3 which are a plurality of concrete members forming the portions 6 are arranged in the length direction and these longitudinal end portions of the arch-shaped unit plates 3 are joined to each other, an arch-shaped unit plate is provided. 3 on superimposing each other in the longitudinal ends, the Ru provided lower portion 9 co
One end of the ridge 6 in the longitudinal direction is inserted into the other ridge 6.
Upper and lower steps 9R for the ridges to be inserted into
10R is provided continuously on the upper and lower sections 9 and 10, respectively.
The tip of the upper step 9R for the section 9 and the ridge, the lower step 10 and the ridge
Fill the joint material 11 between the lower part 10R and the longitudinal direction.
A plurality of arched unit plates 3 by the inserted PC steel 12
Is integrated in the longitudinal direction, so that the overlap between the upper and lower steps 9 and 10 is adjusted to adjust the distance between each other, and the length of the arch structure is easily adjusted on site. It is possible to improve the workability at the site. Also,
Since the lower part of the joint between the ends is closed by the lower step part 10, the filling work of the joint material 11 does not require a formwork provided at the lower part of the joint, and the joint part by the joint material 11 can be easily waterproofed. it can. Further, compared to the conventional joint structure in which flat end faces are abutted with each other, the upper and lower steps 9, 10 are overlapped and joined, so that the adjacent arch-shaped structure is continuous by the step 9.10. Thus, the joint can improve the shear strength and the like against an external load.
That is, in the conventional structure in which the end faces of the flat surface are abutted to each other, the shearing force against the external load is concentrated at the abutted portion connected by the PC steel material 12, whereas in the present embodiment, the flatness of the unit plate 3 is increased. Steps 9 and 10 having a thickness of about one half of the surface 5a form a continuous structure in which the joints of the arch-shaped unit plates 3 and 3 adjacent in the longitudinal direction are continuous, and the joints are sheared. Strength can be improved. In the raised portion 6, the upper and lower steps 9 for the raised portion are provided.
Since one of R and 10R is inserted into the other raised portion 6,
Width direction of arch-shaped unit plates 3, 3 adjacent in the length direction
Can be easily adjusted.

FIGS. 5 to 9 show a second embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. This is an example in which a main girder, which is a concrete member, is applied to the present invention.This shed forms a roof 23 by integrally bonding a plurality of main girder 21 with a laterally tightening PC steel material 22 facing the length direction of the road, Both ends of the roof 23 in the road width direction are concrete columns 24
And the main girder 21 is composed of a top plate 27, a web 28, and a transverse beam 29 which is a protruding portion, and the T-shaped cross section is in the longitudinal direction. Is continuous
Further, tension is applied to the top portion 27 and the web 28 by a plurality of PC steel materials 26 by a pretension method. One side of the roof 23 is fixed to the concrete wall 25 while being placed on the step 30 of the concrete wall 25, and
An anchor bolt (not shown) is inserted into the hole drilled through the upper surface of 28 to the concrete wall 25, and connected,
The other side is rigidly inserted by inserting a plurality of PC steel materials 32 with the web 28 of the main girder 21 placed on the upper end of the concrete column 24,
The lower portion of the concrete column 24 is fixed to a concrete foundation 33. The said main beam 21 is a concrete member such shed, in its longitudinal ends, 6 and 7
As shown, the polymerization was over serving stepped portion, the lower portions 34 and 35 are formed respectively, the upper and the lower portions 34 and 35, the superposed surfaces 34A which are superimposed on each other, as well as have a 35A, protuberances
The upper and lower steps 34R and 35R are also superimposed on each other.
34A and 35A.

[0013] Then at the junction of the longitudinal direction of the main girder 21 described above, as shown in FIG. 6, on the adjacent main girder 21,
The length dimension is adjusted by adjusting the overlap allowance K of the lower portions 34 and 35, and furthermore, between the upper joint which is a recess surrounded by the tip surface of the upper portion 34 and the lower portion 35 and the end surface of the cross beam portion 29. Then, a joint material 36 such as mortar concrete is filled and waterproofing of the joint is performed. After the joint material 36 is hardened, the joint material 36 is tensioned and integrated by the lengthwise lateral tightening PC steel material 22. When the road is curved, as shown in the plan view of FIG. 8 , the overlap margin K at the upper part of the figure is made smaller than the overlap margin K at the lower part of the figure, and the upper and lower sections 34 and 35 are overlapped. With the main girder 21, a curved roof 23 can be constructed. Although not shown in FIG. 8 , the joint between the tip of the upper section 34 and the lower section 35 is filled with a joint material 36.

As described above, in the present embodiment , the protrusions
The main girder 21, which is a plurality of concrete members forming the cross beam portion 29 , is arranged in the length direction, and in the joint structure of the concrete members connecting the longitudinal ends of the main girder 21, the length of the main girder 21 is determined. on superimposing mutually directionally end one Rutotomoni, the longitudinal ends of the cross beam portion 29 provided lower portions 34 and 35
Ridge that is inserted into the other cross beam part 29 and overlaps each other
Upper and lower sections 34R and 35R, respectively.
At the end of the upper portion 34 and the upper portion 34R for the raised portion.
A joint material 36 between the end and the lower step 35 and the lower step 35R for the ridge.
And a plurality of PC steel materials 22 inserted in the length direction
Because the main girder 21 is integrated in tension in the length direction ,
The length of the roof 23 constituted by the main girder 21 can be easily adjusted on site by adjusting the overlap allowance K of the upper and lower steps 34 and 35, and the joint material 36 Formwork is no longer necessary for filling work, and the upper and lower steps 34R and 35R for raised parts
Alignment in the width direction becomes easier and the joint
It is excellent in shear strength and has the same operation and effect as the first embodiment. Further, in the case of a substantially flat plate like the main girder 21, by adjusting the overlap allowance K in the width direction, The main girder 21 is connected in a substantially curved plane, and the roof 23 conforming to the curve of the road can be easily constructed.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the type, size, shape and size of the concrete member and the size of the upper and lower steps can be appropriately selected. In addition, the joint material is not limited to mortar concrete, and various materials that harden after filling can be used. In addition, both sides of the longitudinal end of the concrete member
To the upper end of the concrete member or to the longitudinal end of the concrete member.
, And a lower portion may be provided on both sides.

[0016]

The present invention exhibits arranged multiple <br/> number of concrete member formed with ridges in the longitudinal direction in the longitudinal direction, joining of concrete members for joining the longitudinal ends each other of concrete members in the structure, on superimposing one another in the longitudinal direction end portion of the concrete element, when Ru provided lower portion co
At one end of the ridge in the longitudinal direction, within the other ridge.
The upper and lower steps for the ridges to be inserted into
The upper and lower sections are provided continuously to the upper and lower sections, respectively.
The tip of the upper portion for the raised portion, the lower portion and the lower portion for the raised portion;
Filled with joint material between the PC steel material inserted in the length direction
More tension integrally the plurality of concrete members in the longitudinal direction
Are those ized, arranging a plurality of concrete members in the longitudinal direction, it can be easily adjusted for these overall length dimension, a width
Easy positioning and shear strength at joints
It is possible to provide a joint structure of a concrete member capable of improving the degree .

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is a front view showing the first embodiment of the present invention.

FIG. 3 is a plan view showing a first embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing the first embodiment of the present invention.

FIG. 5 is a sectional view of a main part showing a second embodiment of the present invention.

FIG. 6 is a sectional view of a main part showing a second embodiment of the present invention.

FIG. 7 is a perspective view of a main part showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a second embodiment of the present invention.

FIG. 9 is a plan view showing a second embodiment of the present invention in which a main girder is applied to a curved road.

[Explanation of symbols]

3 Arch-shaped unit plate (concrete member) 6 Raised part 9, 34 Upper section 10, 35 Lower part 9R, 34R Upper part 10R, 35R for raised part Lower part 21 for raised part Main girder (concrete member) 29 Cross beam (elevated part)

Claims (1)

(57) [Claims] 1. A arranging a plurality of concrete members forming a raised portion in the longitudinal direction in the longitudinal direction, contact of the concrete member for joining the longitudinal ends each other of concrete members
In case the structure, on superimposing one another in the longitudinal direction end portion of the concrete element, Rutotomoni provided lower portion, said Takashi
Insert one into the other ridge at the longitudinal end of the ridge
The upper and lower tiers for the ridges that overlap each other
Provided continuously on the upper and lower tiers, the upper tier and the upper
An eye is located between the tip of the step and the lower step and the lower step for the ridge.
Filled with ground material, the PC steel material inserted in the length direction
A joining structure for concrete members, wherein a plurality of concrete members are tensioned and integrated in the length direction .