JPH10205288A - Joint construction of segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promote the efficiency, work efficiency and quality of segment joint work. SOLUTION: A pin 2 having a rectangular cross section is projected to the end face of one segment 1 of segments 1 and 1 connected to each other, and a pin hole 3 is formed in the end face of the other segment 1. Then, interlocking steps 5 are formed in the pin 2, and the pin hole 3 is equipped with interlocking members 8 and 8 having interlocking projections 12 interlocked with the intelocking steps 5 and urging members 9 of bubber plates for urging the interlocking members 8 to the pin 2 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment joint structure suitable for joining segments when constructing a tunnel.

[0002]

2. Description of the Related Art As is well known, in a shield method, while excavating the ground with a cutter device provided in front of a shield excavator having a skin plate having an external cylindrical shape, an annular body is formed within a skin plate. This is a method of constructing a tunnel underground by assembling a segment divided into a thickness and a predetermined angle, and further taking a reaction force at the front end of the segment to extend a propulsion jack inside a shield excavator.

[0003] Conventionally, in assembling such a shield method or the like in a drilled pit, a joint structure is used in which adjacent segments are joined with bolts and nuts.

[0004]

However, the conventional segment joint structure as described above has the following problems. First, since the bolts and nuts are tightened manually, they are inefficient and time-consuming, which hinders shortening the construction period. Moreover, it is difficult to make the tightening force uniform by manual work, which hinders the quality improvement of the segment joint. In addition, the joining operation must be performed in a narrow space in the tail seal of the shield machine, and there is a problem that workability is poor. The present invention has been made in view of the above points, and has as its object to provide a segment joint structure that can improve the efficiency of segment joining work, improve workability, and improve quality.

[0005]

The invention according to claim 1 is
Pins are provided so as to protrude from the end faces of the segments on one side of the segments joined to each other to cover the tunnel, and a pin hole into which the pins are inserted is formed on the end face of the segment on the other side. A locking step is formed on the outer peripheral surface of the pin, and a locking member having a locking portion that engages with the locking step is formed in the pin hole. A plurality of biasing members are provided so as to be sandwiched, and each of the locking members is provided with a biasing member for biasing the locking member toward the pin.

According to a second aspect of the present invention, in the segment joint structure according to the first aspect, the biasing member is made of rubber.

[0007] The invention according to claim 3 is the invention according to claim 1 or 2.
The joint structure of the segment described above, wherein the pin has a rectangular shape in cross section, and the locking member is disposed on two opposing surfaces of the pin.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a segment joint structure according to the present invention will be described below with reference to FIGS.

As shown in FIG. 1, each segment 1 is set such that the length of one end face 1a on the face side when assembled is shorter than that of the other end face 1b on the wellhead side. ing. In each such segment 1, a plurality of (for example, two) pins 2 are provided on one end face 1a in the direction in which the tunnel to be constructed is continuous, and a pin hole 3 is provided on the other end face 1b. It has the same number of schematic configurations.

The pin 2 has a rectangular shape (rectangular shape) that is long in the radial direction (thickness direction) of the segment 1 when viewed in cross section. As shown in FIG. 2, the base 2 a of the pin 2 is embedded integrally with the anchor bar 4 on one end surface 1 a of the segment 1,
The distal end portion 2b projecting from the one end surface 1a of the segment 1 by a predetermined dimension is tapered so that its cross-sectional area gradually increases from the distal end portion 2b side.

A groove-shaped locking step 5 extending in a direction perpendicular to the axis of the pin 2 is formed on two surfaces of the pin 2 at a position of a predetermined size from the tip 2b. . The tip 2b side of the locking step 5 is an inclined surface 5a.

On the other hand, the pin hole 3 has a configuration in which a locking member 8 and a biasing member 9 are disposed in a casing 7.

The casing 7 has a box shape and is buried integrally with the anchor bar 10 on the other end face 1b side of the segment 1. As shown in FIGS. 2 and 3, the casing 7 has a joint plate 7 a flush with the other end surface 1 b of the segment 1.
A rectangular opening 11 for inserting the pin 2 (see FIG. 2) is formed.

As shown in FIG. 2, the locking members 8 are provided as a pair of two so as to face two surfaces on which the locking step portions 5 of the pins 2 are formed. As shown in FIG. 3, each of the locking members 8 has a plate shape having substantially the same size as the inner dimension of the casing 7 in the thickness direction of the segment 1 (the cross-sectional longitudinal direction of the pin 2). , The pin 2 inserted here (FIG. 2
) (See the peripheral direction of the segment 1).

As shown in FIG. 2, a locking projection 12 having a shape corresponding to the locking step 5 of the pin 2 is formed at the tip of each locking member 8. The locking protrusion 12 has an inclined surface 12a on the base end side corresponding to the inclined surface 5a of the pin 2,
Further, the corner of the end face 1b side of the segment 1 is chamfered to facilitate insertion of the pin 2.

The urging member 9 is made of, for example, a plate-like rubber plate having a predetermined thickness, and is interposed between each locking member 8 and the side surface 7b of the casing 7. Each biasing member 9
The two sides are the locking member 8 and the side surface 7b of the casing 7.
And is glued to.

Due to the elasticity of the urging member 9 made of a rubber plate, the locking members 8, 8 are urged to return to their original positions when they move in the direction away from each other. I have.

Further, a rear surface 7c is provided in the casing 7.
For example, a thin rubber plate 13 is disposed between the locking member 8 and the locking member 8 to smooth the movement of the locking member 8 when the pin 2 and the locking member 8 are fitted. The locking member 8 is configured to be pressed against the joint plate 7a so that no gap is formed between the coupling plate 7a of the casing 7 and the locking member 8.

As shown in FIG. 4, in order to join the segments 1 having the pins 2 and the pin holes 3 to each other,
The pin 2 on the other segment 1 side is inserted into the opening 11 of the pin hole 3 on one segment 1 side. Then, the tip 2b of the pin 2 inserted into the casing 7 from the opening 11 pushes and spreads the locking members 8, 8, and the urging members 9, 9 are compressed and deformed. And
The tip 2b of the pin 2 is engaged with the locking projections 12,
12, the compression of the urging members 9, 9 is released, and the elasticity of the urging members 9, 9 urges the locking members 8, 8 in the direction of returning to the original position, thereby locking the locking projections 12 and the pin 2. The step 5 engages. Thereby, the segments 1 and 1 are joined.

The segments 1, 1 joined to each other by inserting the pins 2 into the pin holes 3 in this manner.
Indicates that the locking step 5 of the pin 2 and the pin hole 3
The pin 2 and the joint plate 7a of the pin hole 3 resist the shearing force.

When assembling the segment 1 having the above joint structure, for example, a propulsion jack of a shield excavator (not shown) is used. That is, the segment 1 held at a predetermined position by an assembling device (not shown)
By pushing out the propulsion jack, it is pushed out toward the previously assembled segment 1. The segments 1 are joined together by inserting the pins 2 of the segments 1 pushed out by the propulsion jacks into the pin holes 3 of the segments 1 previously assembled.

In the joint structure of the segment 1 described above, a pin 2 having a rectangular section is projected from an end face of one segment 1 of the segments 1 and 1 joined to each other, and a pin hole 3 is formed in an end face of the other segment 1. Further, a locking step 5 is formed on the pin 2, and a locking member 8 having a locking projection 12 for engaging with the locking step 5 is formed in the pin hole 3. , 8 and a biasing member 9 made of a rubber plate for biasing each locking member 8 toward the pin 2.
As a result, when assembling the segment 1, the pin 2 of the segment 1 to be assembled is simply inserted into the pin hole 3 of the segment 1 which has been assembled first, and the locking step 5 of the pin 2 and the pin hole 3 And the engaging members 8 of the first and second segments can be engaged with each other to tightly join the segments 1 and 1 to each other. In this manner, the segments 1 and 1 can be easily and surely and evenly joined together with one touch without using bolts and nuts as in the related art, thereby shortening the construction period and improving the quality of the segment joint. Improvement can be achieved. Further, since it is not necessary to perform the joining operation in a narrow space, the workability can be improved and the safety can be improved.

In addition, in such a joint structure, by pushing the segment 1 with a propulsion jack of a shield excavator (not shown), the segment 1 is joined to the previously assembled segment 1. (1) The assembly work can be automated, and the number of workers can be reduced.

In the above embodiment, the pins 2,
As far as the material and outer diameter of the pin hole 3 do not deviate from the gist of the present invention, an optimal one may be appropriately adopted, and is not limited to the above. . Further, as the urging member 9, another member such as a spring may be employed as long as it has elasticity and can urge the locking member 8. Also, the outer shape and the material of the segment 1 itself do not matter at all. In addition, in the above embodiment, the pin 2 of the segment 1 to be assembled is inserted into the pin hole 3 of the segment 1 which has been assembled first, but the present invention is not limited to this. The pin 2 of the segment 1 may be inserted into the pin hole 3 of the segment 1 to be assembled. Further, in the above embodiment, the joint structure of the segment according to the present invention is configured to be applied to the segment of the tunnel constructed by the shield method, but of course, if the segment is used, the method may be applied to a method other than the shield method. It is possible to apply and thereby obtain the same effect as above.

[0025]

As described above, according to the segment joint structure according to the first aspect, pins of the segments to be joined to each other are provided with pins protruding from the end faces of one of the segments, and pins are provided on the end faces of the other segments. A hole is formed, a locking step is formed on the pin, and a locking member having a locking portion that engages with the locking step is formed in the pin hole. And a biasing member that biases the side. Further, according to the joint structure of the segment according to the second aspect, the biasing member has a configuration made of a rubber plate. Furthermore, according to the joint structure of the segment according to claim 3,
The pin is rectangular in cross section, and the locking member is disposed on two surfaces of the pin. As a result, when assembling the segment, the pin of one of the segment to be assembled or the previously assembled segment is inserted into the pin hole of the other segment, so that the locking step of the pin is And the engaging portion of the pin hole are engaged with each other, so that the segments can be closely joined to each other. In this way, the segments can be joined with one touch without using any bolts and nuts as in the prior art and without any manual operation, so that the segment joining operation can be performed easily and reliably, and furthermore, the joining can be performed. The strength can be made uniform, and as a result, the construction period can be shortened and the quality of the segment joint can be improved. Further, since it is not necessary to perform the joining operation in a narrow space, the workability can be improved and the safety can be improved. In addition, in such a joint structure, it is only necessary to push the assembled segment toward the previously assembled segment, for example, by using a propulsion jack of a shielded excavator, which also allows the segment to be assembled. Labor saving in assembling work can be achieved.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a segment to which a segment joint structure according to the present invention is applied, in which (a) a side view as viewed from an end surface on the wellhead side, and (b) as viewed from a surface inside a tunnel. FIG. 3C is a side view as seen from the end face on the face side.

FIG. 2 is a sectional view showing the segment.

FIG. 3 is a side view showing a pin hole of the segment.

FIG. 4 is a cross-sectional view showing a state where the segments shown in FIG. 1 are joined together.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 segment 2 pin 3 pin hole 5 locking step 8 locking member 9 urging member 12 locking convex part (locking part)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Inoue 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation (72) Inventor Kazuo Miyazawa 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation Inside the corporation

Claims (3)

[Claims] 1. A pin is provided so as to protrude from an end face of a segment on one side of segments joined to each other to cover a tunnel, and the pin is inserted into an end face of a segment on the other side. A locking step formed on an outer peripheral surface of the pin, and a locking section having a locking portion engaging with the locking step in the pin hole. A plurality of members are disposed so as to sandwich the pin,
A joint structure for a segment, wherein each of the locking members is provided with an urging member for urging the locking member toward the pin. 2. The segment joint structure according to claim 1, wherein said biasing member is made of rubber. 3. The joint structure for a segment according to claim 1, wherein the pin has a rectangular shape in cross section, and the locking member is disposed on two opposing surfaces of the pin. Segment joint structure.