JPH09255276A - Segment lifting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate vertical shaft constructing work by stabilizing the attitude of a segment in the condition that its width direction is maintained vertical and then lifting the segment. SOLUTION: A supporting section 4 fitted in a grout hole 15 formed in a center position approximately as the gravity position of a segment S having the vertical width direction is provided in the lower end of a T-shaped lifting tool main body 2. Locking sections 3 inserted into bolt boxes 11 provided for connection with the existing segment S are provided in the segment S in body end parts of the lifting tool main body 2. A projecting section 7 fitted in a bolt hole 13 formed in a joint plate 12 provided in the bolt box 11 is provided in the upper surface side of the locking section 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment lifting tool for lifting a segment made of concrete or the like while maintaining a good posture.

[0002]

2. Description of the Related Art Conventionally, as a construction method for constructing a vertical shaft,
There is known a submersible method in which a tubular body to be a vertical shaft is constructed in advance, and the ground below the tubular body is excavated to be submerged to bury the tubular body in the ground.

[0003]

By the way, in the above-mentioned submarine construction method, there is a possibility that the side wall of the cylindrical body may be damaged if there is a boulder layer when the cylindrical body is sunk. For this reason, while excavating a hole in the ground, arc-shaped segments are assembled from above to construct a vertical shaft, but in the case of this construction method, the segments are maintained in a posture in which the width direction is vertical. However, it is necessary to lift and lower it while moving it to the lower side of the existing segment for connection, and there is a problem that a great deal of labor is required for the lifting work.

The present invention has been made in view of the above circumstances, and provides a segment lifting device that can be very easily and stably lifted in a state where the posture of the segment is kept vertical in the width direction. The purpose is to do.

[0005]

In order to achieve the above object, a segment lifting device according to a first aspect of the invention is a segment for lifting a segment formed in an arc plate shape in a state where the width direction is vertical. Which is a T-shaped hoisting device which is hoisted by a hoisting device such as a crane, and which is provided at the lower end of the hoisting device body and is formed at the center position of the segment. Supporting parts that fit and lock into the grout holes, and a plurality of locking parts that are provided at both ends of the lifting device body and that are inserted into and locked in bolt boxes for bolt fastening provided in the segments. It is characterized by having and.

A segment lifting device according to a second aspect is the segment lifting device according to the first aspect, in which a bolt hole formed in a joint plate provided in the bolt box of the segment is provided in the locking portion. It is characterized in that a protrusion that can be fitted to is provided. The segment lifting device according to claim 3 is the segment lifting device according to claim 2, wherein the support portion has a horizontal axis line in the lifting device body that is orthogonal to a fitting direction to the grout hole. It is characterized in that it is rotatably connected as a center.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A segment lifting device according to an embodiment of the present invention will be described below. 1 to 3, reference numeral 1 is a segment lifting tool. This lifting device is T
Character-shaped hoisting gear body 2, locking portions 3 provided on both sides of the hoisting equipment body 2, support portions 4 provided at the lower end of the hoisting equipment body 2, and hoisting equipment The main body 2 has a hoisting metal fitting 5 provided near both ends of the main body 2, and a wire 6 of a crane is hooked on the hoisting metal fitting 5 to be lifted.

The engaging portion 3 has a protruding portion 7 protruding upward, and when the engaging portion 3 is put in a bolt box 11 provided in a segment S to be lifted, the protruding portion 7 is a bolt hole 13 of a joint plate 12. It is designed to fit into. Further, the support portion 4 is fitted into the grout hole 15 formed at the center position which is substantially the center of gravity of the segment S, and is horizontally attached to the lower end portion of the lifting device main body 2 orthogonal to the fitting direction. They are connected so as to be rotatable around the shaft 14.

Next, a case will be described in which a vertical shaft is constructed by connecting the segments S by using the lifting device 1 for the segment. (1) First, the construction site of the vertical shaft is first dug to obtain the segment S.
Is assembled in a tubular shape, and the subsidence prevention reinforcement 2
1 is joined and arranged on the outer peripheral side, and concrete K is placed on the outer peripheral side of the first-stage tubular portion T1 including the segment S (see FIG. 4).

(2) Next, the lower portion of the tubular portion T1 of the first stage is excavated, and when a predetermined depth equal to or larger than the width dimension of the segment S is reached, the segment S is moved to the lower side of the tubular portion T1 of the first stage. And the bolts are fastened to the segment S of the first-stage tubular portion T1 as well as in the circumferential direction to construct the second-stage tubular portion T2 (see FIG. 5).

Here, in the case of hoisting the segment S in order to construct the second-stage tubular portion T2 below the first-stage tubular portion T1, first, the hoisting tool is attached to the bolt box 11 formed in the segment S. Locking part 3 provided on the lifting tool body 2 of No. 1
While inserting the protruding portion 7 of the locking portion 3 into the bolt hole 13 formed in the joint plate 12, the support portion 4 provided at the lower end portion of the lifting device main body 2 is attached to the grout hole 15. (See FIG. 6). At this time, this support portion 4
Is rotatably connected to the lifting device main body 2 by a horizontal shaft 14 that is orthogonal to the fitting direction into the grout hole 15. Therefore, by inserting the locking portion 3 into the bolt box 11, Even when the main body 2 is tilted, this support portion 4
Can be easily fitted into the grout hole 15.

When the hoisting tool 1 is hoisted by the crane in this state, the segment S to which the hoisting tool 1 is attached is hoisted vertically while being supported at the center position which is substantially the center of gravity. Then, the segment S whose posture is maintained vertically in this way is moved below the first-stage tubular portion T1, and the segment S and the first-stage tubular portion T1 are moved.
And the segment S of the same are bolted to each other in a bolt box 11 other than the bolt box 11 used by the hoisting tool 1, and then the hoisting tool 1 is removed and the locking portion 3 is inserted. The bolts 11 are also bolted together, and the segments S are bolted together in the circumferential bolt box 11.

(3) When the second-stage tubular portion T2 is constructed as described above, the ground below the second-stage tubular portion T2 is excavated and the third-stage tubular portion T3 is excavated. And then
By repeating the above work, the tubular portion T4,
T5 ... is constructed to complete the vertical shaft T in which the segments S are assembled (see FIG. 5).

As described above, according to the above-mentioned hoisting tool, the hoisting tool is fitted into the grout hole 15 formed at the approximate center of gravity of the segment S to be positioned and locked. The bolt box 1 provided on the inner peripheral surface side of the segment S by the locking portion 3 provided on the
Since the bolt hole 13 is locked by being inserted into 1, the segment S can be stably lifted in a state where the posture thereof is maintained vertical. This allows
When constructing the shaft T using the segment S, the segment S can be moved and assembled in the lateral direction in a state in which the posture is maintained vertically, which facilitates the construction work. Therefore, the construction period can be shortened.

Further, according to this hoisting tool 1, the bolt box 11 and the grout hole 1 formed in the segment S are formed.
5, it is not necessary to attach a metal fitting such as an eyebolt for lifting to the segment S for lifting, that is, a fitting for locking the locking portion 3 and the support portion 4 for lifting. Installation and removal work can be eliminated. Further, since the supporting portion 4 is rotatably connected to the lifting device main body 2, the locking portion 3 of the lifting device main body 2 is provided.
Even in a state in which is inserted into the bolt box 11 of the segment S, it is extremely easy to rotate the support portion 4 to align the position, and then insert and fit into the grout hole 15 of the segment S.

[0016]

As described above, according to the segment lifting device of the present invention, the following effects can be obtained. According to the segment lifting device of claim 1, the segments are locked by the locking portions provided at both ends of the T-shaped lifting device body, and the support is provided at the lower end of the lifting device body. Since the portion is fitted and locked in the grout hole formed at the center position which is the substantially center of gravity of the segment, the segment can be lifted while keeping the width direction thereof vertical. This makes it extremely easy to build a vertical shaft using segments,
Since the segments can be moved and assembled in the horizontal direction while keeping the width direction thereof vertical, the construction work can be facilitated and the construction period can be shortened. In addition, the bolt box or the grout hole formed in the segment is used to suspend the locking portion and the support portion for lifting, that is, it is not necessary to attach metal fittings such as eye bolts for lifting to the segment for lifting. Therefore, it is possible to eliminate the work of attaching and removing the metal fittings for lifting.

According to the segment lifting device of the second aspect of the invention, since the protrusion of the engaging portion is fitted into the bolt hole formed in the joint plate, the segment can be securely engaged with the engaging portion. It is possible to obtain a stopped state. According to the segment lifting device of claim 3, since the support portion is rotatably connected to the lifting device body about the horizontal axis that is orthogonal to the fitting direction into the grout hole, the lifting device can be lifted. Even when the hoisting tool body is tilted by inserting the locking part of the tool body into the bolt box of the segment, it is extremely easy to
The support can be inserted and fitted into the grout hole of the segment.

[Brief description of drawings]

FIG. 1 is a perspective view of a segment to which a lifting tool is attached for explaining the configuration and structure of the lifting tool for a segment according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a segment to which a lifting tool is attached for explaining the configuration and structure of the lifting tool for the segment according to the embodiment of the present invention.

FIG. 3 is a perspective view of a hoisting tool for explaining the configuration and structure of the hoisting tool for the segment according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view of the ground where a vertical shaft is constructed for explaining the construction work of the vertical shaft that is constructed using the segment lifting device of the embodiment of the present invention.

FIG. 5 is a cross-sectional view of the ground on which a vertical shaft is constructed for explaining the structure of the vertical shaft constructed using the segment lifting device of the embodiment of the present invention.

FIG. 6 is a perspective view of a segment and a hoisting tool for explaining hoisting of the segment by the hoisting tool for the segment according to the embodiment of the present invention.

[Explanation of symbols]

 1 Lifting tool 2 Lifting tool body 3 Locking part 4 Support part 7 Projection part 11 Bolt box 12 Joint plate 13 Bolt hole 15 Grout hole S segment

Claims (3)

[Claims] 1. A hoist for a segment that hoists a segment formed in an arc plate shape in a state where the width direction is vertical, and is formed in a T shape to be hoisted by a hoisting device such as a crane. A hoist body, a support portion provided at a lower end of the hoist body, the support portion being fitted and locked in a grout hole formed at a center position of the segment, and provided at both end portions of the hoist body. And a plurality of locking portions which are inserted into and locked by a bolt box for bolt fastening provided in the segment. 2. The locking portion is provided with a protrusion that can be fitted into a bolt hole formed in a joint plate provided in the bolt box of the segment. Lifting equipment for the segment. 3. The supporting part is rotatably connected to the lifting device body about a horizontal axis orthogonal to the fitting direction into the grout hole. Lifting equipment for the segment.