JPH0596131U - Sheath tube plate - Google Patents

Abstract

(57) [Abstract] [Purpose] Improve the accuracy of the installation angle of the sheath tube used to fix the continuous underground wall with the earth anchor, secure the cover between the plate and the reinforcing bar, and also the surface for the anchor work metal fittings. An object of the present invention is to provide a sheath tube plate capable of improving accuracy. [Structure] In a sheath tube 7 used for fixing a continuous underground wall of a reinforced concrete structure with an earth anchor, upper and lower side edges 6a of a plate 6 for fixing the sheath tube are bent to form the plate surface 6 and the reinforcing bar 4. A sheath tube plate having a structure for ensuring a cover thickness with 5.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheath tube plate, and more particularly to a sheath tube plate used when fixing a continuous underground wall of a reinforced concrete structure with an earth anchor.

[0002]

[Prior Art]

 A continuous underground wall with a reinforced concrete structure can be supported by a steel frame or fixed by an earth anchor. In the case of an earth anchor method, a sheath tube is used to pass the tension material of the prestressed concrete structure. As a method of fixing the sheath tube, conventionally, a method of simply sandwiching the sheath tube between reinforcing bars of a continuous wall and fixing it, and a method of attaching a plate to one end of the tube and directly fixing this plate to the reinforcing bar have been adopted.

FIG. 3 shows an example of a conventional sheath tube fixing method. In FIG. 3, reference numeral 1 denotes the wall surface of the continuous underground wall, and the structure of the reinforcing bar is composed of anchor anchoring part reinforcing bar 2, shear reinforcing bar 3, vertical bar 4, horizontal bar 5, and the reinforcing bar of this continuous wall has one end. The sheath tube 7 having the plate 6 attached thereto is fixed. The sheath tube is fixed by welding the plate 6 to the horizontal line. However, this method does not secure the covering between the reinforcing bar and the plate.

Further, FIG. 4 shows a state in which a tendon is inserted through a sheath tube and cement milk is poured therein. In FIG. 4, the sheath tube 7 is set in the continuous wall composed of the wall surfaces 1 and 1 of the continuous underground wall, and the fixing base 11, the anchor plate 12 and the anchor head 13 are attached to the sheath tube 7, and The tension material 14 is inserted, and the cement milk 16 is further injected into the ground by the cement milk injection pipe 15.

[0005]

[Problems to be solved by the device]

 It is difficult to secure the accuracy of the inclination angle of the pipe by the method of fixing the sheath pipe by directly sandwiching it with the reinforcing bar of the continuous wall, etc. in the above-mentioned conventional fixing method, and it is also integrated with the plate. Even if it is attempted to improve the accuracy of the angle by fixing the flat plate and the reinforcing bar of the continuous wall directly, securing the cover between the reinforcing bar and the plate surface was impaired. Furthermore, in the case of the method that does not use a plate, there is a problem in that a gap (because the concrete surface is not smooth) is created between the concrete surface of the continuous wall and the metal fittings for anchor construction, and there is a problem in receiving stress.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to improve the accuracy of the inclination angle for attaching a sheath tube used when fixing a continuous underground wall with an earth anchor, It is an object of the present invention to provide a sheath tube plate that can secure the covering between the plate and the reinforcing bar and further improve the surface accuracy of the metal fitting for the anchor work.

[0007]

[Means and Actions for Solving the Problems]

 The present inventor has made various studies on solving the above-mentioned problems, and has paid attention to the fact that the plate for fixing the sheath tube has a shape in which the upper and lower edges are bent.

That is, the present invention is based on the above idea, and the gist thereof is a sheath tube used for fixing a continuous underground wall of a reinforced concrete structure with an earth anchor. A sheath tube plate having a shape in which both side edges are bent to ensure a cover thickness between the plate surface and the reinforcing bar.

The sheath tube plate according to the present invention comprises a flat surface of the plate and bent portions of both upper and lower edges thereof, and is fixed between the upper and lower ends fixed to the reinforcing bar and the flat surface. It has a shape that forms a depth. Therefore, the structure can secure the covering thickness between the flat surface of the plate and the reinforcing bar. The sheath tube plate according to the present invention is simple and easy to be fixed by welding or the like at the upper and lower ends of the sheath tube by attaching the fasteners that can be easily attached to and detached from the reinforcing bar.

[0010]

【Example】

 The present invention will be described below based on examples. FIG. 1 is a side sectional view showing an example of an attached state of a sheath tube plate according to the present invention. FIG. 1 shows a state in which a sheath tube 7 having a plate 6 attached to one end thereof is fixed to the inside of a continuous underground wall of a reinforced concrete structure composed of vertical bars 4, horizontal bars 5, and wall surfaces 1, 1. The plate 6 has a shape in which both upper and lower edges 6a are bent, and upper and lower both ends 6c are welded and fixed to a reinforcing bar.

Next, a sealing material 8 for stopping water is attached to the sheath tube 7. Plates 9 and 10 at both ends of the sheath tube 7 are prepared by inserting a tension material into the sheath tube and further adding cement milk. It is a blocking plate until it is injected into the inside. According to the sheath tube plate of the present invention, since the covering of the concrete layer on the front surface of the closing plate 10 can be made thin, less chipping of the concrete is required and the position of the sheath tube hole can be easily detected.

FIG. 2 shows another example of the sheath tube plate according to the present invention. That is, the plate 6 is attached to one end of the sheath tube 7 and the upper and lower edges 6a of the plate are bent, and hooks 6b are attached to the upper and lower ends of the plate. By thus providing the hook or other locking tool, it becomes easy to attach and fix the sheath tube plate to the reinforcing bar.

[0013]

[Effect of the device]

 According to the present invention, in a sheath pipe used for fixing a continuous underground wall of a reinforced concrete structure with an earth anchor, a plate for fixing the sheath pipe has a shape in which the upper and lower edges of the plate are bent, and between the plate surface and the reinforcing bar. Since the sheath tube plate can be manufactured by factory processing due to the structure that secures a certain interval, the accuracy of the inclination angle of the sheath tube mounting can be improved, the mounting labor can be reduced, and it can be used as a metal fitting for anchor work. It is possible to improve surface accuracy and work efficiency. Furthermore, since the cover thickness between the plate and the reinforcing bar can be secured and the cover between the plate surface and the concrete surface of the continuous underground wall can be thinned, less concrete can be removed and the sheath tube hole It becomes easy to detect the position.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an example of an attached state of a sheath tube plate according to the present invention.

FIG. 2 is a side sectional view showing another example of the sheath tube plate according to the present invention.

FIG. 3 is a side view showing an example of a conventional sheath tube fixing method.

FIG. 4 is a side view showing a state in which a tendon is inserted through a sheath tube and cement milk is injected therein.

[Explanation of symbols]

 1 Wall surface of continuous underground wall 2 Anchor anchoring part reinforcing bar 3 Shear reinforcing bar 4 Vertical bar 5 Horizontal bar 6 Plate 6a Plate bending part 6b Hook 7 Sheath tube 9, 10 Closing plate 11 Anchoring pedestal 12 Anchor plate 13 Anchor head 14 Tension material 15 Cement milk injection pipe 16 Cement milk

Claims (2)

[Scope of utility model registration request] 1. A sheath tube used for fixing a continuous underground wall of a reinforced concrete structure with an earth anchor, wherein a plate for fixing the sheath tube is formed by bending both upper and lower edges of the plate, and a covering between the plate surface and the reinforcing bar. A sheath tube plate having a structure that ensures thickness. 2. The sheath tube plate according to claim 1, wherein locking members are attached to both ends of the bent plate.