JP2001226912A - Concrete structure of wall balustrade and medial strip or the like and its fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly fix a concrete structure efficiently on a floor slab. SOLUTION: The dowel bars D of the floor slab B are inserted into through- holes 1g, 1h while a flowing opening (v) is formed between the top face Bu of the floor slab B and the base of a base section 1a and a contact seat is brought into contact with the top face Bu of the floor slab B, to erect the concrete structure A on the floor slab B. A sealing material 7 is put into the outer circumferential section of the flowing opening (c) and the flowing opening (c) is brought to a liquid-tight state in this case. Shrinkage-compensating mortar M is injected from the injection hole 1i of the concrete structure A, the through- holes 1g, 1h are filled through the flowing opening (c), and the mortar is solidified and the fixing of the concrete structure A is completed. Skill and special technique are not required because mortar M is only injected into the injection hole 1i, and the concrete structure A can be fixed efficiently onto the floor slab B with fixed strength rapidly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete structure such as a wall railing or a median strip standing on a floor slab and a structure for fixing the concrete structure to the floor slab.

[0002]

2. Description of the Related Art Conventionally, a concrete structure such as a wall balustrade or a median strip has a plurality of stud (bolt) insertion holes formed at a base thereof, and a stud protruding upward from an upper surface of a floor slab. The nut is screwed into each of the insertion holes to be integrally fixed to the floor slab.

[0003]

The above-described conventional bolting method for concrete structures has the following problems. (A) A nut and a washer for fixing the stud in cooperation with the bolt are required, which increases the material cost. (B) In addition to the work of tightening bolts, in order to strengthen the fixing force, it is necessary to bury the mortar in the through holes of the studs, which is troublesome and costly in terms of construction. (C) The bolts must be tightened with a predetermined accuracy, and even in such a case, the tightening force of the bolts may be loosened over time. Take it.

[0004] It is an object of the present invention to provide a concrete structure such as a wall railing or a median strip which can be firmly fixed to a floor slab at low cost in terms of material, construction and management, and a fixing structure thereof. And Another object of the present invention is to provide a concrete structure such as a wall rail or a median strip which can be efficiently fixed to a floor slab in a short period of time, and a fixing structure thereof.

[0005]

In order to achieve at least one of the above-mentioned objects, the invention according to claim 1 is characterized in that a base section is placed on a floor slab and fixed to the floor slab or a center separation wall. In a concrete structure such as a belt, a contact seat which is in contact with the upper surface of the floor slab to form a mortar circulation gap between the upper surface of the floor slab and the bottom surface of the base, and the lower end is opened to the bottom surface of the base. A through hole is provided with an upper end opened to an outer surface other than the bottom surface, and a through hole for inserting a dowel bar projecting upward on the upper surface of the floor slab, and one end opened to the bottom surface of the base portion and the other end to an outer surface other than the bottom surface And an injection hole for injecting mortar into the through hole through the flow gap.

According to this means, a concrete structure is inserted into a through hole with a dowel bar projecting upward from the upper surface of the floor slab, and a flow gap of mortar is formed between the upper surface of the floor slab and the bottom surface of the base. Then, in a state where the contact seat is in contact with the upper surface of the floor slab, the non-shrink mortar is filled from the injection hole into the through hole through the flow gap, and is fixed integrally to the floor slab by solidifying the non-shrink mortar. In the above description, the filling mortar rises in the through hole as the filling proceeds, so that the degree of filling can be known by looking at the upper end of the through hole.
The non-shrink mortar in the flow gap fills the error in the molding accuracy of the concrete structure and the floor slab and bonds the concrete structure to the floor slab.

[0007] Unlike the conventional method, the construction is easy, the nut and the washer are not required, and the management after fixing is not particularly required.

[0008] In the concrete structure such as the wall balustrade or the median strip according to the first aspect, the through-hole can be formed by a sheath tube. With this configuration, it is easy to form the through hole at a predetermined position in a predetermined shape.

In a concrete structure such as a wall railing or a median strip according to claim 1 or 2, it is preferable that the diameter of the upper end of the through hole is larger than the diameter of the lower end thereof (claim 3). In this configuration, the pull-out strength of the dowel from the concrete structure is increased, and the concrete structure is firmly fixed to the floor slab. The through hole is generally in a tapered state in which the whole is widened, but is not limited thereto.
Sometimes only a portion is tapered or stepped.

[0010] In the concrete structure such as the wall balustrade or the median strip according to the second aspect, the rib can be formed in the circumferential direction of the sheath tube. In this configuration, the ribs increase the bond between the sheath tube and the mortar and / or the sheath tube and the concrete structure.

[0011] The invention according to claim 5 is the invention according to claims 1 to 4.
The concrete structure such as a wall railing or a median strip described in any one of the above, inserts a dovetail bar projecting upward on the upper surface of the floor slab into the through hole, and connects the upper surface of the floor slab and the bottom surface of the base. Solidification of the non-shrinkable mortar injected from the injection hole and filled into the through hole through the flow gap while the contact seat is in contact with the upper surface of the floor slab by forming a flow gap of the mortar therebetween. With this configuration, it is fixed integrally to the floor slab.

According to this means, the non-shrinkable mortar filled in the through hole and solidified fixes the concrete structure to the floor slab via the dowel bar, and the non-shrinkable mortar filled in the flow gap and solidified is used as the concrete structure. The object is glued directly to the floor slab. The gibber streak usually has a rib on the outer surface, but is not limited thereto and may have another shape.

In the structure for fixing a concrete structure such as a wall railing or a median strip according to claim 5, it is preferable that the liquid tightness of the flow gap is enhanced by a sealing material. In this configuration, the non-shrink mortar is prevented from leaking to the outside by the sealing material, and is filled into the through-hole accurately and quickly, thereby maintaining the designed fixing strength. The sealing material is sandwiched between the floor slab and the concrete structure,
If necessary, sandwich it between adjacent concrete structures. The sealing material sandwiched between the floor slab and the concrete structure absorbs errors in the shape of the concrete structure and the floor slab due to its own elasticity, and the concrete structure is fixed until the non-shrink mortar solidifies. It is kept in the state. Therefore, a large-scale preparation for eliminating errors in the shapes of the concrete structure and the floor slab is not required.

[0014]

Embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 6 show an embodiment of the present invention. In these figures, the symbol A is a wall rail (concrete structure) according to the present invention.

The main body 1 of the wall railing A is made of reinforced concrete, has a long front surface, and its base 1a is thickened on the inner side (the front side in FIG. 1 and the right side in FIG. 2).
b is curved to the inner surface side (there is also a non-curved wall height section). A notch 1c is provided at the lower part of both sides of the main body 1.
Are formed, and engagement step portions 1d and 1e are formed on the side surface above the notch 1c. Reference numeral 3 denotes a reinforcing bar embedded in the main body 1 in a lattice shape.

The base 1a is provided with a contact seat 1f, a plurality of through holes 1g and 1h having a circular cross section, and an injection hole 1i. The contact seat 1f is in contact with the upper surface Bu of the concrete floor slab B to form a flow gap c of the mortar M between the upper surface Bu of the floor slab B and the bottom surface 1at of the base 1a. The through-holes 1g, 1h and the injection hole 1i are mutually connected by the flow gap c.

The through holes 1g and 1h are formed on the upper surface B of the floor slab B.
A dovetail (anchor) D projecting upward is inserted into u, and its lower end is opened to the bottom surface 1at of the base 1a and its upper end is opened to the upper surface 1au of the base 1a. The injection hole 1i fills the through holes 1g and 1h with the mortar M through the flow gap c, and has a lower end opened to the bottom surface 1at of the base 1a and an upper end opened to the front surface 1az of the base 1a. Have been. The through holes 1g and 1h and the injection hole 1i are
It is formed by a sheath tube 5. Reference numeral 6 denotes an insert for attaching a fitting or the like.

In the wall section A having the above structure, first, the dowels D of the concrete floor slab B are inserted into the through holes 1g and 1h, and the gap between the upper surface Bu of the floor slab B and the bottom surface 1at of the base 1a. Is formed, and the contact seat 1f is brought into contact with the upper surface Bu of the floor slab B to stand on the floor slab B. At this time, a sealing member 7 made of rubber or the same material as the peripheral portion between the upper surface Bu of the floor slab B and the contact seat 1f and the bottom surface 1at of the wall panel A, that is, the outer peripheral portion of the flow gap c is provided. The flow gap c is made liquid-tight by being sandwiched. The sealing material 7 prevents leakage of the mortar M to be injected later to the outside, and also acts as a cushion material to absorb errors in the molding accuracy of the wall sill A and the floor slab B, so that the wall sill A can be maintained at a predetermined height. Stabilize in the state of.

The caulking material 9 is packed between the notches 1c, 1c between the adjacent wall columns A, A as shown in FIG. At this time, as shown in FIG. 6, a sealing material 11 such as a sponge may be packed between the engaging steps 1 d and 1 e as necessary to seal the inside and outside of the wall columns A and A. Reference numeral 13 in FIG. 5 is a backup material.

In order to improve the liquid tightness of the flow gap c, FIG.
As shown by the two-dot chain line, the sealing material 7 may be interposed also on the side surface of the base 1a. Further, for the purpose of adjusting the height of the wall section A and improving the stability, a spacer 15 such as a steel plate may be inserted into a substantially central portion inside or outside the bottom surface 1at or another portion as shown by a two-dot chain line in FIG. is there.

Next, the non-shrink mortar M is injected from the injection hole 1i of the wall rail A, and the through holes 1g, 1
h. In this case, the progress of the filling of the mortar M into the through holes 1g and 1h is known from the top of the through holes 1g and 1h, but when the mortar M rises to near the upper ends of the through holes 1g and 1h, the through holes 1g and 1h are removed. Cover 1h with a cap to prevent mortar M from overflowing. After all the through holes 1g and 1h are filled with the mortar M in this manner, the mortar M is maintained as it is, and the filling mortar M is solidified to complete the fixing of the wall rail A.

In the above state, the through holes 1g, 1h
The mortar M filled and solidified integrally fixes the wall rail A to the floor slab B by integrating the dovetail D and the sheath tube, and the mortar M filled and solidified in the flow gap c forms the wall rail A. Adhesively fix to the floor slab B directly. For this reason, the wall rail A is firmly and stably fixed to the concrete floor slab B in a predetermined posture. Further, since the mortar M is simply injected into the injection hole 1i, no skill or special technique is required, and the wall column A can be fixed to the floor slab B efficiently and quickly with a predetermined strength.

Further, although it is necessary to insert the sealing material 7 as a preparation, it is not an operation requiring skill and labor.
Can be done quickly.

FIG. 7 shows an example in which the through holes 1g and 1h are tapered so that the diameter increases as approaching the upper end. By doing so, the pull-out strength of the dowel D below is increased, and the fixing force of the wall column A is accordingly increased.

FIG. 8 shows an example in which the diameters of the upper portions of the through holes 1g and 1h are made larger in steps than the diameters of the lower portions. Also in this case, the pull-out strength of the dowel muscle D downward is increased, and the wall column A is firmly fixed.

FIG. 9 shows an example in which a rib 5a is formed in the circumferential direction of the sheath tube 5 in which the through holes 1g and 1h are formed. In this case, the fixing force of the sheath tube 5 to the main body 1 and the sheath tube 5
Of the mortar M is strengthened by the ribs 5a, and as a result, the fixing force of the wall rail A is increased.

1 to 6, and the through-hole 1 shown in FIGS.
g and 1h can be formed directly on the main body 1 without using the sheath tube 5.

Although the illustrated dowel bar D has a rib Da in the circumferential direction of the outer periphery, the present invention is not limited to this, and a dovetail bar of another shape such as a stud with a head can be used. As the concrete structure A, there is a median strip provided at the center of a roadway or the like in addition to the wall railing. Therefore, the shape and the structure of the concrete structure A are not limited to those shown in the figures, but are arbitrary. The number and positions of the facilities of the through holes 1g and 1h and the injection holes 1i are changed according to the shape and structure of the concrete structure. Depending on the related structure between the concrete structure A and the concrete floor slab B, the sealing material 7 may not be used.

As an alternative to the non-shrink mortar, there is a two-component cured resin. However, the two-component mixed resin must be uniformly mixed at a predetermined ratio and is inferior in workability and reliability. Not used in the invention.

[0030]

As described above, according to the first aspect of the present invention, the concrete structure is firmly fixed to the floor slab by filling the non-shrinkable mortar from the injection hole through the flow gap to the through hole. Can be. Therefore, unlike the conventional fixing method, no additional materials such as nuts and washers are required, the construction is easy, and since it does not loosen over time unlike a nut, there is no need for management after fixing, and material Costs are generally lower in terms of construction, management and management.

In the concrete structure such as a wall railing or a median strip according to claim 1, when the through hole is formed by a sheath tube, it is easy to form the through hole at a predetermined position in a predetermined shape, The fixed strength as designed can be obtained.

In a concrete structure such as a wall railing or a median strip according to claim 1 or 2, when the diameter of the upper end side of the through hole is larger than the diameter of the lower end side, pull-out strength of the dowel from the concrete structure. And the fixing strength and reliability of the concrete structure are increased.

In the concrete structure such as a wall railing or a median strip according to claim 2, when the rib is formed in the circumferential direction of the sheath tube, the rib is a sheath tube and a non-shrink mortar and / or a sheath tube and a concrete structure. In this case, the fixing strength and reliability of the concrete structure are increased because the bonding strength of the object is increased.

According to the fifth aspect of the present invention, the fixing strength as designed can be obtained at a low cost by a short-term operation without requiring skill.

In the structure for fixing a concrete structure such as a wall balustrade or a median strip according to the fifth aspect, in the structure in which the liquid tightness of the flow gap is enhanced by a sealing material, the fixing strength as designed is accurately and reliably. Can be obtained.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is also a side view.

FIG. 3 is a cross-sectional view showing a fixing structure of a wall railing which is a concrete structure.

FIG. 4 is a side view of a base of a wall balustrade.

FIG. 5 is a plan view showing an example in which a caulking material is packed into a notch.

FIG. 6 is a plan view showing an example of sandwiching a sealing material with respect to an engagement step.

FIG. 7 is a schematic view showing another example of a through hole.

FIG. 8 is a schematic view showing another example of a through hole.

FIG. 9 is a schematic view showing still another example of a through hole.

[Description of Signs] A Wall balustrade (concrete structure) B Concrete floor slab Bu Top surface c Flow gap D Gibber streaks Da rib M Non-shrink mortar 1 Main body 1a Base 1at Bottom surface 1au Top surface 1az Front surface 1f Contact seat 1g, 1h Through hole 1i Injection hole 5 Sheath tube 5a Rib 7 Sealing material

Claims (6)

[Claims] 1. A concrete structure such as a wall railing or a median strip fixed on a floor slab by mounting the base on the floor slab, wherein the concrete structure is in contact with the upper surface of the floor slab and An abutment seat for forming a mortar flow gap between the bottom and the bottom surface, and a lower end opened to the bottom surface of the base and an upper end opened to an outer surface other than the bottom surface, and protruded upward from the upper surface of the floor slab. A through hole for inserting a dowel muscle, and an injection hole provided with one end opened on the bottom surface of the base and the other end opened on an outer surface other than the bottom surface, and for injecting mortar into the through hole through the flow gap. Concrete structures such as wall railings and median strips. 2. The concrete structure according to claim 1, wherein the through hole is formed by a sheath tube. 3. The concrete structure according to claim 1, wherein the diameter of the upper end side of the through hole is made larger than the diameter of the lower end side thereof. 4. The concrete structure according to claim 2, wherein a rib is formed in a circumferential direction of the sheath tube. 5. A concrete structure such as a wall railing or a median strip according to any one of claims 1 to 4, wherein a dowel bar projecting upward from an upper surface of a floor slab is inserted into a through hole. In a state where a mortar flow gap is formed between the upper surface of the floor slab and the bottom surface of the base and the contact seat is in contact with the upper surface of the floor slab, the mortar is injected from the injection hole and penetrates through the flow gap. A fixing structure for a concrete structure such as a wall railing or a median strip which is integrally fixed to a floor slab by solidifying non-shrink mortar filled in holes. 6. The fixing structure for a concrete structure such as a wall railing or a median strip according to claim 5, wherein the fluid tightness of the flow gap is enhanced by a sealing material.