JP2835929B2 - How to assemble segments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling segments used in a shield machine.

[0002]

2. Description of the Related Art A method of forming a new segment ring by assembling a trapezoidal segment having a trapezoidal planar projection shape on the face side of a segment ring that has already been assembled has been adopted. In this case, since the planar projection shape of the segment is trapezoidal, the segments are arranged alternately with the trapezoidal short piece facing the face side, and the trapezoidal long piece is directed to the face side at intervals. Assembling is performed in the order in which the remaining segments are inserted in the state.

[0003]

The above-described method for assembling a trapezoidal segment has the following problems. <a> Since this method is to arrange every other segment and insert another segment with a delay between them, unless the interval between the segments on both sides is kept accurately, the insertion of the segment inserted between them It will be difficult. <B> Because of the trapezoidal shape, it is difficult to assemble sequentially and in succession, so management of the assembling work is important. <C> Since the segment is assembled one by one, the assembling time cannot be reduced.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a method for assembling a trapezoidal segment that can accurately and quickly assemble a trapezoidal segment. I do.

[0005]

In order to achieve the above object, a method for assembling a segment according to the present invention comprises:
Using a trapezoidal segment with a planar projection shape, one long side of one trapezoidal segment is fixed to the end face of the completion ring, and then a parallelogram is formed by two segments and attached to a single segment. Similarly, this is a segment assembling method in which a parallelogram is formed by two segments, attached adjacent to the preceding segment, and finally wrapped with one trapezoidal segment to cover the remaining space.

Further, in the method for assembling a segment according to the present invention, six segments having a trapezoidal planar projection shape are used,
Three segments form a horizontally long trapezoidal segment unit, which is fixed to the end face of the completion ring. Then, another three other segments form a horizontally long trapezoidal segment unit, which is formed by the end face of the completion ring. It is characterized by the method of assembling the segments, which is to be mounted toward the.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for assembling a segment according to the present invention will be described below with reference to the drawings.

<A> Trapezoidal Segment The segment assembling method of the present invention is used in an embodiment in which the entire cross section of the shield machine is excavated by six segments. Further, the segment used in the assembling method of the present invention has a trapezoidal planar projection shape. Therefore, this segment has a shape in which parallel short pieces and long pieces are connected by oblique sides. A segment group having such a shape is newly assembled in a ring shape on the face side of a segment ring that has already been assembled. An assembling method using six or more segments will be described later.

<B> Single Segment From among the six segments, one trapezoidal segment is first formed into a segment ring R which has already been assembled.
Attach to the face side of. (FIG. 1) When this is referred to as a single segment 1, the single segment 1 has its long side fixed to the end face of the completion ring R. Therefore, the short side of the single segment 1 is arranged in a state facing the face side.

<C> First segment unit Next, the two segments are connected in the opposite directions, one long side and the other short side. If two trapezoids are arranged with their long and short pieces connected in the opposite direction, a parallelogram is formed. This is the first
This is referred to as a segment unit 2. (FIG. 2) The first segment unit 2 is mounted adjacent to one side in the circumferential direction of the single segment 1 described above. (FIG. 3) In the first segment unit 2, the single segment 1 has the short piece attached to the face side.
The single segment 1 is attached such that the long piece of the segment in contact with the oblique side faces the face side.

<D> Second segment unit Next, two other segments are newly arranged to form a parallelogram by arranging the long side and the short side in opposite directions. Name. (FIG. 4) Since the first segment unit 2 is already fixed to one side of the single segment 1, the second segment unit 3 is attached adjacent to the other side of the single segment 1 in the circumferential direction. (FIG. 5) Also in this case, the single segment 1 is attached with its short piece facing the face, so that the second segment unit 3
, The segment is attached so that the long piece of the segment in contact with the hypotenuse of the single segment 1 faces the face.

<E> Residual lining segment Thus, when two sets of segment units each composed of two segments are attached to both sides of the single segment 1,
The total is five, and the remaining portion is only the interval of one segment. The remaining interval forms a trapezoid in which the face side is wide and the completion ring R side is narrow. Therefore, in the remaining portion of this large shape, the key segment 4 as the last one is
With the short side facing the end surface of the completion ring R.
(FIG. 5) Then, the key segment 4 covers the opposing remaining intervals of the first and second segment units 2 and 3, and the assembly of the segments for one ring is completed.

[0013]

Another Embodiment 1 The above configuration is an embodiment using two sets of segment units. However, even if two or more sets of segment units are used, it is needless to say that the ring can be constructed by similarly assembling. In that case, the third, fourth,..., Nth segment units composed of two segments are used. That is, the assembling order is such that the individual segments are 12, 12, 12,..., 10 key segments.

[0014]

[Other Embodiment 2] (FIG. 6) <a> Trapezoidal Segment This embodiment also uses six segments whose trapezoidal planar projection shape is used, and a new segment ring R on the face side of the already assembled segment ring R is used. This is a method of assembling the segment ring.

<B> First Three-Segment Unit First, three long segments are sequentially arranged in opposite directions on the long side and the short side to form a first trapezoidal three-segment unit 5 as a whole. I do. The first three-segment unit 5 is simultaneously lifted and one long side thereof is fixed to the end surface of the completion ring R.

<C> Second three-segment unit Next, another three segments are newly arranged, and the long and short sides are sequentially arranged in the opposite directions, and the second three-segment is formed as a horizontally long trapezoid as a whole. The segment unit 6 is constituted. Then, three second three-segment units 6 are lifted at the same time, and the short side thereof is attached to the end surface of the completion ring R. Then, the remaining portion in the circumferential direction of the first three-segment unit 5 can be covered by the second three-segment unit 6, and a complete ring is completed.

[0017]

As described above, the method for assembling segments according to the present invention has the following advantages. <A> It is not necessary to arrange every other segment, and it is possible to assemble in a state of being sequentially contacted. Therefore, it is not necessary to take care to keep the interval accurately in advance, and there is no occurrence of an accident that makes it difficult to insert a later segment. <B> Since there is no need to assemble while considering the contact with other segments, it is possible to assemble accurately in an accurate state. <C> Since the ring can be formed by a small number of times in a state where two or three segments are assembled together, the assembling time can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a method for assembling a segment according to the present invention.

FIG. 2 is an explanatory view of a method for assembling a segment according to the present invention.

FIG. 3 is an explanatory view of a method for assembling a segment according to the present invention.

FIG. 4 is an explanatory view of a method for assembling a segment according to the present invention.

FIG. 5 is an explanatory view of a method for assembling a segment according to the present invention.

FIG. 6 is an explanatory view of another embodiment of the segment assembling method of the present invention.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Sakae 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Yoshihiro Uchiyama Machiichi Wadazaki Hyogo-ku 1-chome No. 1 Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (58) Field surveyed (Int. Cl. ⁶ , DB name) E21D 11/08

Claims (4)

(57) [Claims] 1. A trapezoidal segment whose planar projection shape is used, one long side of one trapezoidal segment is fixed to an end face of a completion ring, and then a parallelogram is formed by two segments to form a parallelogram. A segment assembling method in which a segment is attached, a parallelogram is formed of two segments in the same manner, the segment is attached adjacent to the preceding segment, and finally, the remaining space is wrapped by one trapezoidal segment. 2. A method for assembling a new segment ring on the face side of a segment ring which has already been assembled, using six segments each having a trapezoidal planar projection shape. Is fixed to the end face of the completion ring to form a single segment. Then, the two segments are arranged in opposite directions on the long side and the short side to form a parallelogram first segment unit. A first segment unit is attached adjacent to one side in the circumferential direction of the single segment, and another two segments are newly arranged in a parallelogram by arranging the long side and the short side in opposite directions. And the second segment unit is attached adjacent to the other side of the single segment in the circumferential direction. Finally, the short side of one trapezoidal segment is attached. A segment assembling method, wherein the segment is attached to an end face of a completion ring, and lining is performed on the remaining remaining distance between the first and second segment units. 3. A method for assembling a new segment ring on the face side of a segment ring which has already been assembled, using eight or more segments each having a trapezoidal plane projection shape, wherein one long side of one trapezoidal segment is first used. Is fixed to the end face of the completion ring to form a single segment. Then, the two segments are arranged in opposite directions on the long side and the short side to form a parallelogram first segment unit. A first segment unit is attached adjacent to one side in the circumferential direction of the single segment, and another two segments are newly arranged in a parallelogram by arranging the long side and the short side in opposite directions. This second segment unit is attached adjacent to the other side in the circumferential direction of the single segment. Hereinafter, similarly, the two segments are attached to each other. The long side and the short side are arranged in opposite directions to form a parallelogram segment unit, and this segment unit is attached adjacent to the other circumferential side of the previously assembled segment unit. A segment assembling method, in which the short side of one trapezoidal segment is attached to the end surface of the completion ring, and the remaining space opposed to the segment unit is lining. 4. A method for assembling a new segment ring on a face side of a segment ring which has already been assembled, using six segments each having a trapezoidal planar projection shape, the three segments being composed of a long side and a short side. The first and second sides of the first three-segment unit are fixed to the end surface of the completion ring, and then newly formed. The other three segments are arranged so that the long side and the short side are opposite to each other to form a horizontally long trapezoidal second three-segment unit. The short side of the second three-segment unit is A segment assembling method, wherein the segment is attached to the end surface of the completion ring and the remaining portion in the circumferential direction of the first three-segment unit is wrapped.