JPH0720187Y2 - Water stop fittings for concrete structures - Google Patents

Description

[Detailed description of the device]

[0001]

[Industrial application] The present invention relates to a watertight joint for a concrete structure having a box-shaped section or a channel section used as a common groove for housing communication cables, power transmission lines, pipes for various purposes, or as a sewer or drainage channel. It is about.

[0002]

2. Description of the Related Art Conventionally, as a water stop joint of a concrete structure having a box-shaped or groove-shaped cross section, which is used for common grooves, sewers, drainage channels, etc., as shown in FIG. A frame-shaped outer vertical end plate 10, and an intermediate step plate 11 bent and connected at right angles to the inner end portion of the outer vertical end plate 10,
A pair of frame-shaped end frames 13 including an inner vertical end plate 12 bent and connected at a right angle to the tip of the intermediate step plate 11.
Are arranged opposite to each other, a large number of anchor bolts 14 are inserted into the intermediate step plate 11 in each frame-shaped end frame 13 and fixed by welding, and a corrugated portion 15 and flanges 16 continuously provided on both sides thereof are formed. Each of the flanges 16 of the rubber watertight packing 17 made of is superposed on the surface of the intermediate step plate 11 in the frame-shaped end frame 13, a belt-shaped holding plate 18 is superposed on the surface of the flange 16, and the anchor is formed. The bolt 14 includes a flange 16 and a holding plate 18.
The flange 16 is tightened and fixed to the intermediate step plate 11 via the holding plate 18 by the nut 19 screwed into the anchor bolt 14 and concrete is contacted with the back surface of each frame-shaped end frame 13. A waterproof joint for a concrete structure is known in which a box-shaped concrete structure 9 is formed by casting.

[0003]

In the case of the conventional water stop joint for a concrete structure, since the inner vertical end plate 12 is bent and connected to the intermediate step plate 11 at a right angle, the end of the concrete structure 9 is closed. Since a right-angled concave portion is formed in the portion, a crack extending from the corner of the concave portion is likely to be generated at the end of the concrete structure 9, and the intermediate step plate 11 and the inner vertical end plate 12 make the concrete structure 9 Since a right-angled notch is created at the end of, a relatively large cross-section loss occurs,
Therefore, the strength of the end of the concrete structure 9 decreases,
Further, when concrete is placed so as to contact the back surface of the lower portion of the frame-shaped end frame 3, air remains at the lower portion of the intermediate step plate 11 in the lower horizontal portion of the frame-shaped end frame 13, and therefore the intermediate step Since the adhesion strength between the plate 11 and the concrete is lowered, the strength of the lower end of the concrete structure 9 is lowered, and there is a problem that water leaks from between the intermediate step plate 11 and the concrete.

[0004]

In order to advantageously solve the above-mentioned problems, in a waterproof joint for a concrete structure of the present invention, a steel frame-shaped end portion arranged at the end portion of the concrete structure is provided. The frame 3 is provided with a frame-shaped inclined end plate 2 that is inclined so as to incline toward the inside of the structure from the middle portion in the thickness direction of the end portion of the structure to the middle side in the longitudinal direction of the structure. 2, an anchor member 4 projecting to the back side is fixed, a pair of frame-shaped end frames 3 are arranged so as to face each other with a gap, and a groove-shaped portion 5 and a flange 6 connected to both sides thereof are provided. Each of the flanges 6 of the rubber watertight packing 7 is superposed on the surface of the inclined end plate 2 of each of the frame-shaped end frames 3 and fixed by the bolts and the pressing plate 8. Concrete is placed so that it touches the Concrete structure 9 is constituted by.

[0005]

1 to 3 show a first embodiment of the present invention, which is a rectangular or upward opening groove-shaped vertical end located on a vertical plane perpendicular to the longitudinal direction of a structure to be built. A rectangular or groove-shaped inclined end plate 2 that inclines so as to incline toward the intermediate side in the longitudinal direction of the structure is bent and connected to the inner peripheral edge of the plate 1, and the inner peripheral edge of the inclined end plate 2 is arranged in the longitudinal direction of the structure. The rectangular frame-shaped or groove-shaped flanges 20 parallel to each other are bent and connected to form the steel frame-shaped end frame 3. A large number of cap nuts 21 are arranged at intervals in the longitudinal direction of the flange on the back surface of the flange 20, each cap nut 21 is fixed to the flange 20 by welding, and the flange 20 has a female screw hole of the cap nut 21. A through hole is provided at a position facing each other, and a large number of through holes 22 are provided at an intermediate portion in the width direction of the inclined end plate 2 at intervals in the longitudinal direction of the inclined end plate.

The frame-shaped end frames 3 with the cap nuts 21 constructed as described above are arranged so as to be opposed to each other in a parallel state with a space therebetween, and are anchored to the bolts 23 in which the anchor members 4 are continuously provided. A nut 24 is screwed into the bolt 23, and the bolt 23 is inserted into the through hole 22 from the back side of the inclined end plate 2 and is made of rubber, which is composed of a groove portion 5 and flanges 6 that are continuously provided on both sides in the width direction. Each flange 6 in the packing 7 is
The metal pressing plate 8 is superposed on the surface of the inclined end plate 2 in each of the frame-shaped end frames 3, the metal pressing plate 8 is superposed on the surface of the flange 6, and the bolt 23 is inserted through the through hole of the flange 6 and the pressing plate 8. The flange 6 is inserted through the holding plate 8 by the nut 25 that is inserted into the hole and screwed into the bolt 23.
Are fastened and fixed to the surface of the inclined end plate 2.

A stretchable joint material 26 made of foamed rubber or foamed synthetic resin is interposed between the vertical end plates 1 of the opposite frame-shaped end frames 3 and fixed by an adhesive,
Concrete is cast on the back side of each frame-shaped end frame 3 to form a concrete structure 9 having a box-shaped section or a groove-shaped section.

When constructing a concrete structure having a waterproof joint using the waterproof packing 7, first, as shown in FIG. 4, along the inner circumference of the frame-shaped end frame 3,
A large number of metal connecting members 27 are arranged at intervals in the circumferential direction of the frame-shaped end frame, and both ends of the connecting member 27 are connected to each other by bolts 28 screwed into the cap nut 21. Is fixed to the flange 20 of the partial frame 3, and the elastic joint material 26 is further attached to the vertical end plate 1 of each frame-shaped end frame 3.
It is interposed between and fixed by an adhesive.

Next, as shown in FIG. 5, stretchable joint material 26.
A partition formwork 29 located outside the inner moldwork, and an inner formwork 30;
The outer formwork (not shown) is arranged, and concrete is placed in the part surrounded by each formwork and the frame-shaped end frame 3 to form the concrete structure 9 and the curing of the concrete is completed. After that, each frame and connecting member 27
Are removed to obtain the state shown in FIG.

FIGS. 6 to 8 show a second embodiment of the present invention, in which a large number of ridges 31 extending in a direction intersecting with each other are formed on the back surface of the steel frame-shaped end frame 3. Although they are provided so as to be arranged in a substantially lattice pattern, the other configurations are the same as in the case of the first embodiment.

In the case of the above-mentioned embodiment, an anchor bolt consisting of the bolt 23 and the anchor member 4 connected to the bolt 23 is used, but the anchor member is fixed to the inclined end plate 2,
In addition, the bolts that are separate from the anchor members are attached to the inclined end plates 2,
The flange 6 may be inserted into the through holes of the flange 6 and the holding plate 8 and the nut may be screwed into the bolt to fix the flange 6 to the surface of the inclined end plate 2 via the holding plate 8.

[0012]

According to the present invention, the steel frame-shaped end frame 3 arranged at the end of the concrete structure extends from the middle of the end of the structure in the thickness direction toward the inside of the structure. A frame-shaped inclined end plate 2 that inclines so as to incline toward the middle side in the longitudinal direction of the structure, and concrete is placed so as to contact the back surface of the frame-shaped end frame 3 having the inclined end plate 2. Since the concrete structure 9 having the box-shaped cross section or the groove-shaped cross section is configured, a concave section having a right-angled cross section does not occur around the end of the concrete structure 9, and therefore the concave section having a right-angled cross section is caused. Since it is possible to prevent cracks from occurring in the concrete structure 9 and the cross-section missing portion generated at the end of the concrete structure 9 is small, it is possible to reduce the strength reduction at the end of the concrete structure 9. ,further Since the lower portion of the shaped end frame 3 there is no horizontal stage plate, when Da設 concrete on the back side of the lower part of the Wakukatachitan portion frame 3, Wakukatachitan unit frame 3
It is possible to prevent air from remaining on the back side of the frame, and to pour concrete on the back side of the frame-shaped end frame 3 in a solid state. Therefore, the adhesion between the frame-shaped end frame 3 and the concrete structure 9 is prevented. It is possible to increase the strength and prevent water leakage between the frame-shaped end frame 3 and the concrete structure 9. Further, by providing a large number of ridges 31 on the back surface of the steel frame-shaped end frame 3, the adhesion area between the frame-shaped end frame 3 and the concrete structure 9 is increased, and the frame-shaped end frame 3 and the concrete structure 9 are The adhesion strength with the structure 9 can be remarkably increased, and the water leakage prevention property between the frame-shaped end frame 3 and the concrete structure 9 can be remarkably improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a waterproof joint for a concrete structure according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a front view of a frame-shaped end frame to which a cap nut is attached.

FIG. 4 is a vertical sectional side view showing a water shutoff joint connected by a connecting member.

FIG. 5 is a vertical cross-sectional side view showing a state immediately after placing concrete constituting the concrete structure.

FIG. 6 is a vertical sectional side view showing a waterproof joint of a concrete structure according to a second embodiment of the present invention.

FIG. 7 is a vertical cross-sectional side view showing a part of FIG. 6 in an enlarged manner.

FIG. 8 is a diagram showing an arrangement of protrusions on the back surface of the frame-shaped end frame.

FIG. 9 is a vertical cross-sectional side view showing a conventional waterproof joint for a concrete structure.

[Explanation of symbols]

 1 Vertical End Plate 2 Inclined End Plate 3 Frame End Frame 4 Anchor Member 5 Groove Part 6 Flange 7 Rubber Water Stopper Packing 8 Holding Plate 9 Concrete Structure 20 Flange 21 Cap Nut 23 Bolt 24 Locking Nut 25 Nut 27 connecting member 28 bolt 31 ridge

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location E04B 1/684 F16L 1/038

Claims (3)

[Scope of utility model registration request] 1. A steel frame-shaped end frame 3 arranged at an end of a concrete structure extends in the longitudinal direction of the structure from the middle part of the end of the structure in the thickness direction toward the inside of the structure. It is provided with a frame-shaped inclined end plate 2 which is inclined so as to fall to the middle side,
Anchor member 4 protruding to the back side of the inclined end plate 2.
And a pair of frame-shaped end frames 3 are arranged so as to face each other with a space therebetween, and each flange 6 in the rubber waterproof packing 7 is composed of a groove-shaped portion 5 and flanges 6 continuously provided on both sides thereof. Is superposed on the surface of the inclined end plate 2 in each of the frame-shaped end frames 3 and fixed by the bolts and the pressing plate 8. Concrete is poured so as to contact the back surface of each of the frame-shaped end frames 3 and the concrete. A water stop joint for a concrete structure in which the structure 9 is configured. 2. A frame-shaped inclined end plate 2 inclined so as to incline toward an intermediate side in the longitudinal direction of the structure is bent and connected to an inner peripheral edge of a frame-shaped vertical end plate 1 perpendicular to the longitudinal direction of the structure. A steel frame-shaped end frame 3 is configured, an anchor member 4 protruding to the back side is fixed to the inclined end plate 2, and the pair of frame-shaped end frames 3 are arranged facing each other with a space therebetween. The flanges 6 in the rubber watertight packing 7 composed of the groove portion 5 and the flanges 6 provided on both sides of the groove portion 5 are superposed on the surface of the inclined end plate 2 in each of the frame-shaped end frames 3 and bolted. And a water stop joint for a concrete structure in which concrete is fixed by pressing plates 8 and concrete is cast so as to contact the back surface of each frame-shaped end frame 3. 3. The water stop joint for a concrete structure according to claim 1, wherein a large number of ridges 31 are provided on the back surface of the steel frame-shaped end frame 3.