JP3548788B2 - Precast concrete member connection device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a precast concrete member connecting device for connecting precast concrete members such as a shield tunnel segment, a box culvert or a U-shaped groove concrete block.
[0002]
[Prior art]
Conventionally, when lining and assembling a shield tunnel using arc-shaped precast concrete segments, as a method of joining between the joining surfaces on the width direction side of the segments, that is, the joining surface between the rings, it is connected to one of the joining surfaces joined to each other. A pin is protruded and a pin fitting hole is opened on the other surface, and when joining both joining surfaces, the connecting pin is inserted into the pin fitting hole to position the segments with each other. Methods for maintaining the tring shape have been developed (for example, JP-A-4-213697, JP-T10-510019, and JP-A-10-259699).
[0003]
These conventional connecting devices between precast concrete members have a relative positional relationship between the precast concrete members by inserting a connecting pin having a tapered tip into a pin fitting hole whose opening is tapered. In addition, the connecting pin is pressed into the pin fitting hole, and is prevented from coming off by the pulling resistance of the connecting pin.
[0004]
[Problems to be solved by the invention]
In the conventional connecting device between precast concrete members as described above, the retaining between the precast concrete members joined to each other is supported by the pull-out resistance of the fitting pin portion press-fitted into the pin fitting hole. It easily comes off due to the external force in the pulling direction of the mating pin part, and when underground structures such as shield tunnels, box culverts, U-shaped grooves are implemented, it easily comes off when ground deformation such as ground subsidence occurs, There was a problem that the function of the intended underground structure was impaired.
[0005]
The present invention has been made in view of such conventional problems, and enables easy joining of precast concrete members such as shield tunnel segments, box culverts, and U-shaped groove blocks with good workability. An object of the present invention is to provide a connecting device between precast concrete members which does not come off unless it is damaged.
[0006]
The feature of the present invention for solving the conventional problems as described above and achieving the intended object is that a synthetic resin-made convex coupling is provided on one side of a joining surface between shield tunnel segments and other precast concrete members. And a concave connecting member made of a synthetic resin in which the convex connecting member is fitted on the other side, and the concave connecting member and the convex connecting member are fitted to each other so that the precast concrete member is inserted. In the joining device between precast concrete members for connecting
The convex coupling is base end is embedded in the one of the precast concrete member protrudes from the distal end side is member between joint surfaces, a fitting convex portion having a pin fitting hole to the tip surface, the fitting convex An elastic piece whose base end is supported by the outer surface of the distal end of the portion and whose distal end is projected obliquely toward the outer side of the base end of the fitting projection, and a retaining locking surface formed at the distal end of the elastic piece. Prepare,
The concave coupling device is configured such that the retaining surface for retaining is brought into contact with a tubular portion which is buried by being opened at a joint surface between members of the other precast concrete member, and an inner peripheral surface of an opening of the tubular portion. and the locking protruding portion that, protrudes into the opening side from the tubular portion inner bottom portion, and a fitting pin to be fitted into the pin fitting hole,
By inserting the convex coupler into the concave coupler, the retaining surface at the tip of the elastic piece enters the inside of the locking projection and is retained.
[0007]
In addition, the cylindrical portion and the fitting pin of the concave connection metal fitting are both formed in a circular shape, and the fitting projection of the convex connection metal fitting is formed in a polygonal shape of a triangle or more, and an elastic piece is provided for each side of the polygonal shape. Rukoto equipped with, and, in the inter-member bonding surface of one of the precast concrete parts, the possible convex connector support member mounted convex coupling when needed Yatoe, requires convex communication Itoguchigu can be mounted at In this case, it is preferable that, in this case, the tubular portion buried by being opened at the joint surface between the members of the precast concrete member as the convex connecting member support member, and the inner peripheral surface of the opening of the tubular portion, a locking protruding portion locking surface is abutting, is protruded on the opening side from the tubular portion inner bottom portion, using the concave connector having a mating pin fitted to the pin fitting hole And a fitting projection having a pin fitting hole on the tip end surface in a symmetrical arrangement on both end sides. An elastic piece whose base end is supported on the outer surface of the distal end portion of the fitting projection and whose distal end projects obliquely outward of the base end of the fitting projection, and a retaining member formed at the distal end of the elastic piece. It is preferable that a convex connecting member having a stop surface is used, and one end of the convex connecting member is inserted into a concave connecting member as a convex connecting support member and mounted when necessary.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0009]
1 to 8 show a first embodiment of the present invention, in which reference numeral 1 denotes a precast concrete member (hereinafter, referred to as a PCa member) to be connected to each other, and a and b denote both members. It is a joining surface between members. A convex connector 2 is installed on one member joint surface a, and a concave connector 3 is installed on the other member joint surface b. 1 are permanently connected.
[0010]
The convex connector 2 has a fitting projection 21 entirely formed into a cylindrical shape from a reinforced synthetic resin material containing glass fiber. It is protruding. The fitting protrusion 21 has its base end buried in the joint surface between the members, and is provided integrally with the flange 22 at its base end.
[0011]
The fitting protrusion 21 is formed in a hollow triangular cylindrical shape, and the elastic piece 23 is integrally formed on each surface corresponding to each side of the triangle by being supported by the outer surface of the distal end of the fitting protrusion 21. Have been. The base end of the resilient piece 23 is supported by the cylindrical portion 21, and the distal end side is projected obliquely outward toward the base end side of the fitting projection 21. 24 are integrally formed, and the leading end forms a flat locking surface 25.
[0012]
The hollow of the fitting projection 21 is a pin fitting hole 26, and is opened at the tip end surface.
[0013]
Like the convex connector 2, the concave connector 3 is entirely formed of a reinforced synthetic resin material containing glass fiber, and is opened and buried in the inter-member joint surface b of the other precast concrete member. have. On the inner peripheral surface of the opening of the cylindrical portion 31, a locking projection 32 is integrally formed in a ring-like arrangement. The inner peripheral tip side of the ring-shaped projection 32 is a tapered surface 33 whose opening side is expanded.
[0014]
A flange 34 is formed integrally with the outer periphery of the base end side of the tubular portion 31. A fitting pin 36 is integrally provided in the base end side opening through radially arranged ribs 35, 35,. I have. The fitting pin 36 protrudes from the center of the cylindrical portion 32 to reach the opening. The outer periphery of the tip of the fitting pin 36 is tapered to form a tapered surface 37.
[0015]
The fitting pin 36 is formed so as to have a thickness matching the pin fitting hole 26 of the above-mentioned convex connector 2 as indicated by a phantom line in FIG. The diameters of both are selected so that the fitting projection 21 can be easily inserted into the opening in the portion 32.
[0016]
By inserting the fitting projection 21 of the convex connector 2 into the cylindrical portion 31 of the concave connector 3, the fitting pin of the concave connector 3 is inserted into the pin fitting hole 26 of the fitting cylinder 21. The elastic piece 23 is elastically pushed in the center direction by the inner peripheral edge of the protruding portion 32, and the locking portion at the tip of the elastic piece 23 is inserted. The elastic piece 23 expands to its original position due to its own elasticity when the 24 enters the back side of the overhang portion 32, and the locking surface 25 faces the back side surface of the overhang portion 32, so that the convex connector 2 is It becomes impossible to escape, and the shearing stress in the longitudinal direction of the elastic piece 23 becomes the escape resistance.
[0017]
In the above-described embodiment, the case where the convex connector 2 is fixedly embedded in the PCa member 1 is shown. However, the convex connector may be attached at the time of the PCa member joining operation.
[0018]
FIG. 9 shows a case in which the convex connector can be attached so that it cannot be detached when necessary. In this example, the projecting portion is the same as the projecting portion of the convex connector 2 shown in FIG. Is used in the object arrangement at both ends. That is, a fitting convex portion 21 having pin fitting holes 26 on the distal end surface symmetrically disposed at both end sides, a base end side supported by the outer surface of the distal end portion of the fitting convex portion 21, and the distal end side being a fitting projection base end A convex connecting member 4 having an elastic piece 23 projecting obliquely outward and a retaining locking surface 25 formed at the tip of the elastic piece 23 is used. The above-mentioned concave connector 3 is used as a member and opened to the inter-member joint surface a, and the opening of the cylindrical portion 31 is exposed and embedded in the inter-member joint surface a.
[0019]
Prior to joining the PCa members 1, 1, one end of the convex connector 4 is press-fitted into one concave connector 2 so as to be non-removably attached to the one member joining surface a or b. The PCa members 1 and 1 are joined in the same manner as described above. The same parts as those in the above-described example are denoted by the same reference numerals, and redundant description will be omitted.
[0020]
【The invention's effect】
As described above, in the connecting device between precast concrete members according to the present invention, the convex coupler has a base end side embedded in one of the precast concrete members and a distal end side protruding from the joining surface between the members, and has a distal end surface. A fitting protrusion having a pin fitting hole, an elastic piece having a base end supported on an outer surface of a distal end portion of the fitting protrusion and having a distal end projecting obliquely toward the outside of the base of the fitting protrusion; A retaining portion formed at a tip end of the elastic piece, wherein the concave connecting member is formed by opening and burying a tubular portion which is opened at a joining surface between members of the other precast concrete member; A protrusion extending from an inner peripheral surface of the opening to which the locking surface for retaining comes into contact, and protruding from the fixed portion of the cylindrical portion toward the opening, and fitted into the pin fitting hole. A mating pin, and inserting the convex connector into the concave connector. The retaining locking surface at the tip of the elastic piece enters the inside of the locking projection and is prevented from falling off, so that the member-to-member joining surfaces can be joined together while pressing the convex coupling into the concave coupling. By joining, the convex coupling is fitted to the concave coupling so that it cannot come out, and the resistance at that time is taken up by the longitudinal shear stress of the locking head, so that a strong connection is made. The state is obtained.
[0021]
Further, the present invention also provides that the cylindrical portion and the fitting pin of the concave connection fitting are both formed in a circular shape, and the fitting projection of the convex connection tool is formed in a polygonal shape of a triangle or more, and each side of the polygonal shape is formed. By providing an elastic piece for each, the convex connector and the concave connector can be fitted only by matching their axial directions, and at the same time, the retainer elastic piece is made into a flat plate shape. As a result, the flexibility of the retaining elastic piece can be increased, and press-fitting at the time of connection can be easily performed with a small force.
[0022]
Furthermore, a precast concrete member is provided on a joint surface between the members of one precast concrete member by providing a convex connector support member capable of mounting a convex connector when necessary, and by allowing the convex connector to be mounted when necessary. The convex connecting member does not always protrude from the joining surface of the, and the damage of the convex connecting member at the time of stocking at the stock yard or transporting to the construction site is prevented.
[0023]
Further, the cylindrical portion buried by being opened at the joint surface between the members of the precast concrete member as the convex connecting member support member, and the retaining surface for retaining comes into contact with the inner peripheral surface of the opening of the cylindrical portion. Symmetrical to both ends using a recessed connecting tool having a locking overhang portion and a fitting pin projected from the fixed portion of the cylindrical portion toward the opening and fitted into the pin fitting hole. A fitting convex portion having a pin fitting hole on the distal end surface in the arrangement, a base end side is supported on the outer surface of the distal end portion of the fitting convex portion, and the distal end side is projected obliquely toward the outer side of the fitting protrusion base end. A convex connecting member having an elastic piece and a retaining surface formed at the tip of the elastic piece is used. When necessary, one end of the convex connecting member is concavely connected as a convex connecting support member. The convex connector can be inserted into the member and mounted without increasing the types of parts. Enabling one-touch attachment, damage convex coupling during transport to the stock at or construction sites in stockyard is easily prevented.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.
2 is a front view showing a convex connector in the apparatus shown in FIG. 1; FIG. 3 is a rear view of the same.
FIG. 4 is a side view of the same.
FIG. 5 is a longitudinal sectional view of the same.
FIG. 6 is a front view showing a concave connector in the device shown in FIG. 1;
FIG. 7 is a rear view of the same.
FIG. 8 is a longitudinal sectional view of the same.
FIG. 9 is a longitudinal sectional view showing a second embodiment of the present invention.
[Explanation of symbols]
a, b Joint surface between members 1 Precast concrete member 2, 4 convex connecting member 3 Recessed connecting member 21 Fitting protrusion 22 Flange 23 Elastic piece 24 Locking portion 25 Locking surface 26 Pin fitting hole 31 Cylindrical portion 32 Locking projection 33 Taper surface 34 Flange 35 Rib 36 Fitting pin

Claims (4)

A synthetic resin convex connecting member is provided on one side of a joint surface between the shield tunnel segment and other precast concrete members, and the convex connecting member is fitted on the other side. In the precast concrete member coupling device to bury the tool, the concave connector and the convex connector are fitted to each other to connect between the precast concrete members,
The convex coupling is base end is embedded in the one of the precast concrete member protrudes from the distal end side is member between joint surfaces, a fitting convex portion having a pin fitting hole to the tip surface, the fitting convex An elastic piece whose base end is supported by the outer surface of the distal end of the portion and whose distal end is projected obliquely toward the outer side of the base end of the fitting projection, and a retaining locking surface formed at the distal end of the elastic piece. Prepare
The concave coupling device is configured such that the retaining surface for retaining is brought into contact with a tubular portion which is buried by being opened at a joint surface between members of the other precast concrete member, and an inner peripheral surface of an opening of the tubular portion. and the locking protruding portion that, protrudes into the opening side from the tubular portion inner bottom portion, and a fitting pin to be fitted into the pin fitting hole,
A precast concrete characterized in that by inserting the convex connector into the concave connector, the retaining locking surface at the tip of the elastic piece enters the inside of the locking projection and is prevented from falling off. Device for connecting members. The cylindrical portion and the fitting pin of the concave connection fitting are both formed in a circular shape, and the fitting projection of the convex connection tool is formed in a polygonal shape of a triangle or more, and an elastic piece is provided for each side of the polygonal shape. The apparatus for joining precast concrete members according to claim 1, comprising: 3. A convex connector supporting member capable of mounting a convex connector when necessary on a joint surface between members of one of the precast concrete members, and a convex connector can be mounted when necessary. 4. The connecting device between precast concrete members according to claim 1. The retaining portion for retaining is brought into contact with a tubular portion that is buried by being opened at the joint surface between the members of the precast concrete member as a convex connecting member support member, and the inner peripheral surface of the opening portion of the tubular portion. a locking protruding portion, it is protruded on the opening side from the tubular portion inner bottom portion, using the concave connector having a mating pin fitted to the pin fitting hole, symmetrically arranged on both end sides A fitting convex portion having a pin fitting hole on the distal end surface, and an elastic piece whose base end is supported on the outer surface of the distal end portion of the fitting convex portion, and the distal end side of which protrudes obliquely toward the base end of the fitting protrusion. And a convex connecting member having a retaining surface for retaining formed at the tip of the elastic piece, and when necessary, one end of the convex connecting member is used as a concave connecting member as a convex connecting support member. 4. The connecting device between precast concrete members according to claim 3, wherein the device is inserted and mounted.

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