JPS63272898A - Method of joining concrete member - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for joining concrete members such as concrete segments for tunnel lining.

When connecting concrete segments in the tunnel direction, a structure was proposed in which long bolts are inserted into the concrete segments and the long bolts are connected using a coupler. By the way, this connection work involves fitting a coupler to the end of the previous long bolt, assembling the next segment, inserting the long bolt into that segment, and screwing it into the coupler with some effort, so it is not easy to fit the segment. Even a slight deviation in their mutual positions causes considerable difficulty.

This invention was devised in view of the above-mentioned circumstances. In particular, an annular metal fitting is fitted across opposing grooves at the joints of concrete segments to position the segments relative to each other and to serve as a guide when inserting long bolts. The details of the flit will be explained below with reference to illustrated embodiments.

A truncated conical groove 1.1 with a smaller diameter at the deeper part is formed on the opposing joint surfaces of the concrete segments A, A,
The bottom of the groove is continuous with the steel rod insertion hole 2°2.

The steel rod 3.3 is a long bolt with threads formed at both ends. This steel rod 3 is inserted into one segment A, and a coupler 4 having an internal thread is screwed into the part protruding into the groove 1, and the outer diameter of both ends is made smaller in the groove 1. Tapered ring gold 'Jj! Pour half the IJ5 into the liquid.

Next, build up the other segment A, and fit the other half of the annular metal fitting 5 into the groove.

A is made into a butt shape, and then the steel rod 3 is inserted from the other end of the steel rod insertion hole 2, and its tip screw is screwed into the coupler 4 to connect the steel rod 3.3. Further, one entrance of the screw hole of the coupler 4 is tapered so that the steel rod 3 can be easily inserted.

Segments A and A are connected by connecting these steel rods 3 and 3.

In addition, the puller 4 can function as a turnbuckle by making each half of the screw a reverse thread. Further, the entrance of the screw hole of the coupler 4 is tapered so that the steel rod 3 can be easily inserted. Further, a sealing material 6 is interposed between the abutting surfaces of the segments A and A.

The present invention has the above-mentioned configuration, and when connecting concrete members such as concrete segments with long bolts, grooves into which couplers are fitted are formed on the opposing faces of the segments, and tapered annular metal fittings having a small diameter at both ends are installed in the grooves. By fitting, the joints of concrete members are accurately positioned, and the insertion holes of steel rods such as long bolts are aligned in a straight line, and this annular hardware guides the steel rods that are inserted by hand, making it easier to insert them into the coupler. It can be done. In addition, the annular hardware also serves as a shear-bearing material for joints.
Extremely useful.

[Brief explanation of drawings]

Fig. 1 is a front view of the connected state of the segments, partially shown in cross section, Fig. 2 is a front view of the connected surfaces of the segments, Fig. 3,
FIG. 4 is a sectional view of the connecting portion. A...Segment, ■...Concave groove, 2.
... Steel rod insertion hole, 3 ... Steel rod, 4 ...
...Campler, 5 annular hardware, 6... sealing material. Engraving of the drawings Figure 1 Figure 2 Figure 3 Figure 4 Procedural amendment (c) 1, 1ν Cow's field
“Pa°1 Victory Day 1962 Special Application No. 242
No. 997 No. 2. Invention (D name Yo7.+>-h@□O. Concubine method 3, Relationship with the person making the amendment Hanyu Patent applicant name Jun Tsuzuki -4, agent address ■107 Shadow Akasaka 5, 6-5-21 Akasaka, Minato-ku, Tokyo Date of amendment order April 26, 1983 (shipment date) 6 Subject of amendment

Claims (1)

[Claims] (1) A concrete member in which a truncated cone-shaped groove with a small diameter at the deep end is formed on opposing joint surfaces in the longitudinal direction, and a continuous steel rod insertion hole is drilled in the longitudinal direction from the center of the groove bottom. , approximately half of the screw hole of the coupler is screwed and tightened to the rear end screw portion of the steel rod inserted into the steel rod insertion hole of one of the concrete members that protrudes into the groove; Fit one side of an abacus-shaped annular metal fitting whose both sides are in close contact with the groove opening, and place the other side of the annular metal fitting into the groove with the joint surface of the other concrete member facing the joint surface of this concrete member. A method for joining concrete members, characterized in that the threaded end of a steel rod inserted into the steel rod insertion hole of both concrete members by fitting the openings is screwed into the remaining half of the screw hole of the coupler and tightened.