KR20010112190A - An apparatus and method for grouting using both as coupler and spacer. - Google Patents

Abstract

The present invention provides a grouting method and apparatus using a coupler-combining spacer for facilitating the connection of reinforcing bars or pipes and maintaining a center in a drilling hole when the saw nailing or steel pipe multi-stage grouting using rebar or PIPE, etc. It is about.

Coupler spacer of the present invention is composed of a plurality of radial wing spacers to maintain the center spacing of the reinforcing bars or pipes and screw grooves and tightening bolts to increase the friction and tightening force when connecting the reinforcement or pipes.

Description

An apparatus and method for grouting using both as coupler and spacer {An apparatus and method for grouting using both as coupler and spacer.}

The present invention relates to a grouting apparatus and a method using a coupler-compatible spacer for maintaining the center distance in the boring hole, such as reinforcing bars or pipes and facilitating the connection in the grouting construction using the soil nailing and pipe.

Excavation assistance methods recently used in tunnel and slope excavation may be representative of saw nailing and steel pipe multi-stage grouting.

The conventional method is generally performed in the order of perforation, stress material (rebar, steel pipe or plastic pipe, glass fiber pipe, etc.), caulking and sealing, grouting, structural steel pipe or Reinforcing bar is inserted into the drilled hole by using coupling or connecting with female and male thread grooves. The conventional grouting method, which proceeds in the above order, has various problems. First, after the insertion of the steel pipe, the steel pipe is in contact with the inner surface of the drilled hole due to the weight of the steel pipe to block the grout injection hole on the surface of the steel pipe, thereby reducing the grout effect. have. Third, the connection of general steel pipe is made to connect the male pipe and female thread groove to the connection of the steel pipe, so the connection is structurally weaker than the general section. Fourth, when the plastic or thin and narrow iron plate is concave and attached to steel pipe or rebar by welding or steel wire, when the hole is not completely maintained when inserted into the drilling hole, the spacer is not pushed back or enters well. Often happens.

It is an object of the present invention to provide a grouting apparatus using a coupler combined spacer that can solve the disadvantages of the prior art as described above.

That is, the present invention is to provide a grouting device that can facilitate the connection of the stress material (rebar or pipe), to maintain the center distance of the stress material in the drilling hole to maximize the grouting effect.

Another object of the present invention can be expected to increase the strength of the stress material connection.

1 is a perspective view of a coupler combined spacer (for fastening).

Fig. 2 is a cross sectional view of a coupler combined spacer (for fastening).

Fig. 3 is a construction sectional view of a coupler combined spacer (for fastening).

4 is a cross-sectional view of yet another embodiment of a coupler-coupled spacer (for fastening).

5 is a perspective view of the connection of the removable spacer.

Fig. 6 is a perspective view of still another example of a coupler combined spacer (embedded).

Fig. 7 is a side view and a front sectional view of still another example of a coupler-coupled spacer (embedded).

8 is a cross sectional view of still another example of a coupler-coupled spacer (embedded).

<Brief description of the symbols in the drawings>

1: Coupler combined spacer (fastening) 2: Spacer

2 ': removable spacer 3: tapered portion

4: male thread 5: female thread (taper type)

6: Separation groove 7: Lock nut

8: female thread 9: rebar or pipe

10: Drilling Hole 11: Coupler Spacer (Flush Type)

12: Female thread 13: Male thread

14: wedge 15: male portion

(a): rebar or pipe connection

(b): Site mounting without reinforcing bars or pipes

The present invention will be described with reference to the drawings.

1 is a perspective view of a coupler-coupled spacer (for fastening), in which a plurality of blade-shaped spacers 2 radially formed on an outer circumferential surface of a hollow pipe is formed integrally, and the amount of the blade-shaped spacers 2 The tapered portion 3 is formed obliquely at the end, so that the coupler / combination spacer 1 connected to the reinforcing bars and the pipe 9 in the drill hole 10 can be inserted even if the drill hole 10 does not have a constant diameter. And to facilitate drawing.

Both ends of the tapered portion (3) is provided with a female screw portion (5) formed in a tapered shape to be slightly inclined to prevent movement when the reinforcing bar and the pipe (9), the outer peripheral surface of the female screw portion for coupling the tightening bolt The male thread part 4 is further formed, and the tapered female thread part is further provided with a detachable groove 6 so that the tapered female thread part completely wraps the connected reinforcing bars and pipes according to the rotational depth of the tightening bolt when tightening the tightening bolt 7. It is characterized by doing.

FIG. 2 is a cross-sectional view of a coupler-coupled spacer (for fastening), in which a tightening bolt 7 is pre-inserted at both ends of the reinforcing bar or pipe 9 for connection, and the reinforcing bar and pipe 9 are provided in the coupler-coupled spacer 1. Fold the ends of the head and tighten the bolts (7) on both sides to the male threaded part (4), the tapered female threaded part (5) slightly inclined tightens the reinforcing bars and pipes (9). The coupler combined spacer 1 is fixed.

3 is a cross-sectional view of the construction of the coupler combined spacer (for fastening), where (a) is a connection part of the reinforcing bar or pipe (9), and (b) the position is not a connection part of the reinforcing bar or pipe, but the reinforcing bar or pipe in the depth direction of the drilling hole It is characterized in that the coupler combined spacer 1 can be installed at any position other than the connection portion so as to be located close to the center.

Sectional A-A is sectional drawing of a coupler combined spacer, Comprising: It consists of three or four wing-shaped spacers 2 radially on the outer peripheral surface of a coupler so that the reinforcement or pipe 9 may maintain the center in a perforation hole.

4 is a cross-sectional view of another example of a coupler-coupled spacer (for fastening), in which a wedge 14 fastened into a plurality of pieces is installed on the outer circumferential surface of the reinforcing bar or pipe 9, and the inside of the female screw part 5 is provided. It is characterized in that the wedge 14 is further provided with a wedge 14 to secure the reinforcing bar or the pipe 9 when tightening the tightening bolt (7).

Fig. 5 is a perspective view of the connection of the detachable spacer, in which the spacer 2 'formed on the outer circumferential surface of the coupler is not integrated as shown in FIG. When the tightening) is characterized in that the end is rounded so that the ends of the separation type spacer 2 'formed in plural into the inside of the tightening bolt.

Fig. 6 is a perspective view of still another example of a coupler-coupled spacer (embedded), in which a plurality of wing-shaped spacers 2 are formed radially on the outer circumferential surface of a hollow pipe, and the reinforcement or pipe 9 is formed on the inner circumferential surface thereof. A female screw portion 11 coupled to the male screw portion 15 formed on the outer circumferential surface thereof is formed.

FIG. 7 is a side and front cross-sectional view of another example of a coupler-coupled spacer (embedded), with three or four wing spacing radially on the outer circumferential surface of the coupler such that the reinforcement or pipe 9 is centered in the drill hole 10. FIG. It consists of ashes (2).

Fig. 8 is a cross sectional view of still another example of a coupler-coupled spacer (embedded).

Coupler spacer according to the present invention can place a stress material (rebar, steel pipe or plastic or fiberglass pipe, etc.) to be close to the center of the drill hole, so that the grouting effect can be expected evenly inside the drill hole and the stress center This is not biased, which can improve grouting quality. In addition, the strength of the joints of the stressed material is securely enhanced to ensure structural stability, and the connection is made easily and quickly.

Claims (6)

A plurality of wing-shaped spacers radially formed on a wall of the pipe with hollow pipes; Tapered portions formed at both ends of the spacer to be inclined to facilitate insertion and drawing in the drill hole; Female threaded portion formed in a slightly tapered shape to prevent movement when the reinforcing bars and pipes at both ends of the tapered portion; A male screw portion formed on an outer circumferential surface of the female screw portion; Fastening bolts for tightening the reinforcing bars and pipes coupled to the male thread portion; Split grooves to completely wrap the rebar and pipe connected to the tapered female thread portion in accordance with the rotational depth of the tightening bolt when tightening the tightening bolt to the hollow portion of the female and male threads; Grouting device, characterized in that consisting of. A plurality of wing-shaped spacers radially formed on a wall of the pipe with hollow pipes; Tapered portions formed at both ends of the spacer to be inclined to facilitate insertion and drawing of reinforcing bars and pipes in the hole; A female thread part for connecting the hollow pipe and the reinforcement pipe and a male thread of the pipe; Grouting device, characterized in that consisting of. The grouting device according to claim 1 or 2, wherein the blade-shaped spacer member is composed of three or four blades in the longitudinal direction of the curler, and is integrally formed with the coupler in a blade type in which both ends are tapered. The grouting device according to claim 1, wherein the blade-shaped spacer is composed of three or four blades in the longitudinal direction of the curler, and is formed of a coupler and a separate type in a blade type in which both ends are tapered. The tapered arm further includes a plurality of pieces of wedges having an uneven surface formed on the inner surface of the tapered arm to prevent movement of reinforcing bars and pipes when tightened by tightening bolts. Characterized in that the grouting device. Installing a coupler double spacer 1 or 11 at the connection of the reinforcing bar and the pipe; Tightening with tightening bolts to secure rebar and pipes; The coupler combined spacer (1) is further installed by the required number at a position other than the connection portion so as to be a constant interval in the longitudinal direction of the reinforcing bars and pipes; Inserting the reinforcing bars and pipes connected by the length of the hole by the coupler combined spacer into the hole; Injecting through injection hose or pipe Grouting injection method, characterized in that consisting of.