JPH10153097A - Segment coping with continuous excavation and conduit formed with this segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a segment capable of coping with a continuous excavation and efficiently construct a conduit by removing corner portions of a rectangular quadrilateral to form a hexagon segment, arranging the hexagon segments staggeringly by uniform intervals in stages, and spirally assembling the number of the segments to form a ring returning to the same initial position again. SOLUTION: A spiral ring is uniformly divided into rectangular quadrilaterals, corner portions of the rectangular quadrilaterals are removed to form congruent hexagon segments A1 -D1 , and the hexagon segments A1 -D1 are staggeringly arranged in the forward direction in sequence to form the spiral ring in stages. A shape correction is made by proportional distribution so that the length subtracted with the portion of an oblique line 102 from the whole length L1 of the belt shape connected with hexagon segments A1 -D1 becomes equal to the outer periphery of a conduit. The assembly position in the peripheral direction is staggered to the succeeding segment side by the quantity divided with the segment length by the number of segments in the succeeding ring against the preceding ring, the assembly position is returned to the original segment assembly position again after the ring is assembled, and (n) operation patterns of a shield jack are prepared to cope with this phenomenon. The conduit can be efficiently constructed in response to a continuous excavation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a series of processes such as excavation of ground, taking in of excavated earth and sand, and propulsion of a shield excavator, in construction work of a sewer using a shield excavator.
The present invention relates to a continuous digging-compatible segment capable of performing a segment assembling process simultaneously and in parallel, and a sewer composed of the segment.

[0002]

2. Description of the Related Art Generally, in a sewer construction work using a shield excavator, a series of processes such as excavation of ground, taking in excavated earth and sand, and propulsion of a shield excavator, and a process of assembling segments are intermittently and alternately performed. As such, work is not performed in parallel, which is inefficient.

[0003]

However, by using a segment formed by a spiral curved surface, a series of processes such as excavation of ground, taking in of excavated earth and sand, and propulsion of a shield excavator, and a process of assembling the segment are performed. It can be done concurrently. A segment consisting of a helical curved surface is extremely reasonable not only in the continuous excavation of the shield excavator but also in adopting a single-shaped segment, but on the other hand, the segment front end face pressed by a shield jack (spreader shoe) Since the contact angle of the shield excavator is inclined, the shield excavator tends to rotate during excavation due to the effect of the reaction force, so that it is necessary to prevent rotation of the shield excavator or control the attitude of the shield excavator.

The conditions required for a segment to simultaneously perform parallel assembly of a segment and excavation of a shield machine without performing troublesome rotation prevention or attitude control are as follows. That is, the contact surface with the shield jack (spreader shoe) must be at a right angle.

[0005] A ring corresponding to a spiral ring can be formed by arranging segments. The segments and the rings that assemble the segments can be connected continuously. Other requirements or desirable conditions for the segment shape are that the longitudinal edges located in front and behind are not aligned on the same line and that they are kept at appropriate intervals.

[0006] The arrangement of the shield jack should not be hindered. There should be no unnecessary insertion, and segment assembly is easy. Single or decimal type and shape. Applicable to curved pipes as well as straight pipes. Segment manufacturing is not complicated.

The present invention has been made based on such knowledge, and is intended to prevent troublesome rotation of a shield excavator, or to simultaneously perform segment assembly and excavation of a shield excavator without performing attitude control. And a sewer composed of the segments.

[0008]

That is, according to the present invention, a congruent quadrilateral segment having a side parallel to a side perpendicular to the tube axis (when developed on a plane) in the direction of the tube axis. Displaced at equal intervals in the tube axis direction along the sides, and sequentially remove the corners protruding from the stairs in the adjacent quadrangular segments arranged in a stepwise manner, all in a congruent right triangular shape. When the congruent hexagonal segments are assembled in a spiral shape, the ring is advanced in the tube axis direction by a distance slightly shorter than the width of the hexagonal segments per ring, and is continuously assembled. The position in the circumferential direction is shifted toward the succeeding side by the length of the side perpendicular to the tube axis of the right-angled triangle, with the corners protruding stepwise between the rings removed, and the hexagonal segments constituting the ring (Decimal is the integer rounded up) after assembling only ring, a segment, characterized in that the again returns to the beginning and the same position.

Further, the invention according to claim 2 shifts the congruent parallelogram segments having sides perpendicular to the tube axis (when developed on a plane) at equal intervals in the tube axis direction along the oblique sides in the tube axis direction. From adjacent parallelogram segments that are sequentially arranged in a stepwise manner, all acute angles protruding into the stepwise shape are removed into a congruent triangle, and the remaining congruent hexagonal segments are spirally assembled. The ring is advanced by the width of the hexagonal segment, and the segments in the circumferential direction of the hexagonal segments forming the ring which are subsequently assembled continuously are the segments characterized by the shape aligned with the initial position.

[0010] On the other hand, a third aspect of the present invention is a sewer comprising the segment according to the first aspect. Further, the invention according to claim 4 is a sewer composed of the segment according to claim 2.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, dotted lines a and b denote a boundary line of the spiral ring which is assembled by a spiral curved surface segment (not shown) into one ring and advances in the traveling direction by one pitch, that is, the width of the segment.

The spiral ring is equally divided (divided into four in FIG. 2), and rectangular quadrangular segments A ₀ and B equal to the ring width.
₀ , C ₀ , D ₀ (A ₀ , B ₀ , C ₀ , D ₀ are all congruent), and the number of quadrangular segments (FIG. 2
In this case, four squares are sequentially shifted forward (in the traveling direction) by the length obtained by dividing the width of the rectangular quadrilateral segment, so that the quadrilateral segments A ₀ ,
A step-like band connecting B ₀ , C ₀ , and D ₀ is formed. This area is equal to the area of the spiral ring.

Therefore, this step-like band is used as a ring,
If they are successively stacked, they will advance at the same pitch as the spiral ring, and will also be formed as a tube. However, the two requirements stated in the requirements for the segments or the desirable conditions in the preceding paragraph, that is, the front and rear vertical edges are not aligned on the same line and are kept at an appropriate interval.

[0014] Segment assembly is easy without excessive insertion. Does not match In order to solve this, a congruent hexagon obtained by removing the oblique right triangles E and F (the right triangle E and the right triangle F are congruent) from the right quadrilateral segments A ₀ , B ₀ , C ₀ , and D _0. Segments A ₁ , B ₁ , C ₁ , D
_A spiral ring is made in step 1 (see FIG. 1).

The area of the helical ring is smaller than the area of the helical ring by the right-angled quadrilateral segments A ₀ , B ₀ , C ₀ , and D ₀ by the sum of the areas of the right-angled triangles E and F in oblique lines. Therefore, the hexagonal segments A ₁ B ₁ , C ₁ , D
The pitch P ₂ of the helical ring according to ₁ is the square quadrilateral segment A ₀ , B ₀ , C ₀ ,
D ₀ becomes smaller than the pitch P ₁ of the helical ring by.

The boundary line of the spiral ring or the quadrilateral segment
A₀, B₀, C₀, D₀Virtual spiral ring
Hexagonal segment A for boundary lines a, b, c₁,
B₁, C ₁, D₁And A_Two, B_Two, C_Two, D_TwoBy screw
The virtual boundary lines a, d, and e corresponding to the spiral ring are respectively
This indicates the difference in ring pitch. Hexagonal segment
Mento A₁, B₁, C₁, D₁, A_Two, B_Two, C_Two, D
_Two, To connect the rings of
Gment A₁, A_TwoHexagon with the hypotenuse 101 at the beginning of
Segment D₁, D_TwoIs the hypotenuse of the terminal side 102 of
This part must be moved to the next ring
Will do.

Therefore, the hexagonal segment A₁, B₁, C
₁, D₁, A_Two, B_Two, C_Two, D_Two, Formed by phosphorus
Circumference L_TwoIs the hexagonal segment A₁, B₁, C₁,
D₁, A_Two, B_Two, C_Two, D_Two, The whole band connected by
Length L₁Hexagon D compared to₁At the end of the hypotenuse 102
A representative broken line portion (D₁), (D_Two) Short by length
It will be. That is, hexagonal segment A₁, B₁,
C₁, D₁, A_Two, B _Two, C_Two, D_Two, Formed by
Ring circumference L_TwoMust be equal to the circumference of the sewer
So, for the first ring, a hexagonal segment
A₁, B₁, C ₁, D₁Total length L connected with₁From
The portion corresponding to the hypotenuse 102 (broken line portion (D ₁Part))
Proportionally distribute the length to equal the circumference of the sewer
Stretched and the rest of the hypotenuse (broken line
Minutes (D₁)) Must be stretched at the same rate
You. Below, hexagonal segments forming the following ring
A_Two, B _Two, C_Two, D_TwoMake similar corrections for
You have to.

Hexagonal segment A forming a ring₁,
B₁, C₁, D₁, A_Two, B_Two, C _Two, D_Two, The shape of
When making corrections, apply the correction method to the general formula.
Then, it becomes as follows (see FIG. 3). That is, a = n · πd / (n^Two-1) p = (1- (1 / n)^Two)) B where: a: segment length b: segment width n: number of segments when the spiral ring is equally divided p: diagonal section from right-angled quadrilateral segment to right-angled triangle
Ring formed by connecting the removed hexagonal segments
D: the diameter of the sewer π: pi The amount of removal of the right triangle E in the circumferential direction is all a /
n The removal amount in the pipe axis direction of the right triangular portion E is all set to b / n.

In this case, the circumferential assembly position of the segments A, B, C, and D is the amount obtained by dividing the segment length by the number of segments (a /
After shifting to the subsequent segment side by n), assembling the same number (n) of rings as the number of segments, and then returning to the initial segment assembling position again. This can be dealt with by preparing n operation patterns of the shield jack.

Next, a second embodiment of the present invention will be described. In FIG. 5, the ring is formed by dotted lines G and H indicating the boundaries of the spiral ring (not shown) and straight lines N, L, ヲ, W, and F which intersect in the direction (the inclination angle is not specified) as shown in FIG. Divide arbitrarily. That is, when assembling the segments clockwise in the traveling direction, a straight line that inclines to the left with respect to the pipe axis with respect to the rear boundary line g of the ring, nu, ru, ヲ, wa, ka, or When the segments are assembled counterclockwise in the direction of travel, the ring is equally divided by a straight line inclined to the right with respect to the pipe axis with respect to the rear boundary line of the ring.

Referring to FIG. 5, the boundary line G on the rear side of the ring and straight lines N, L,
From the intersections 1, 2, 3, and 4 with ヲ, wa, mosquito, draw straight lines yo, ta, les, and so at right angles to the pipe axis.
At the position equal to the ring width with respect to
Subtracting na and la, all congruent parallelogram segments G ₀ ,
Create H ₀ , I ₀ , and J ₀ .

Next, a straight line having an inclination angle with respect to the tube axis,
ヲ, ヲ, 平行, の, な, 管, 直線, 直線, 直線, 平行, 平行, 直線, 平行, 平行, 平行Intersections 11, 12, 13, 14 with
Are set, and the other intersections 6, 7, 8, 9 and 15, 16, 1
Any congruent triangle K indicated by diagonal lines surrounded by 7, 18
Create In addition, a straight line with an inclination angle to the pipe axis,
平行 Parallel lines separated by a ring width on the tube axis at the intersections 7, 8, 9, and 10 at the intersections of straight lines perpendicular to the tube axis,,, and, Intersections 20, 21, 22, 2 with
3 and the other intersections 2, 3, 4, 5 and 25, 26,
A congruent triangle L indicated by oblique lines surrounded by 27 and 28 is formed.

The parallelogram segments G ₀ , H ₀ , I ₀ ,
Hexagonal segments G ₁ , H ₁ , I ₁ , J ₁ , G ₂ , H ₂ , I ₂ , J obtained by removing triangles K, L from J ₀ , respectively.
₂ , G ₃ , ... are all congruent and hexagonal segments G ₁ ,
The ring area created by H ₁ , I ₁ , J ₁ or G ₂ , H ₂ , I ₂ , J ₂ is equal to the area of the helical ring surrounded by the dotted lines. Therefore, the pitch is also equal.

Hexagonal segments G ₁ , H ₁ , I ₁ , J ₁ , G ₂ , H ₂ , I ₂ , J ₂ , which are characterized by these shapes,
By using the segments G ₃ ,..., It is possible to continuously construct a sewer in a spiral shape with a single segment without changing the circumferential position of the sewer. However, regarding the shape of the hexagonal segments, the vertical edges located in front and behind should not be aligned on the same line and maintain an appropriate interval.

The arrangement of the shield jack should not be hindered. Note that the straight line that slopes (nu, ru, 図, wa,
F) needs to be set so that the inclination angle is not so close to the tube axis direction, and that the straight portion perpendicular to the tube axis on the front surface of the segment pressed by the shield jack has an appropriate length. By using the segments described in the above two embodiments, the continuous excavation can be performed by devising the arrangement of the shield jacks and the shield jack operation pattern without changing the length and shield jack stroke of the conventional shield excavator. And an efficient sewer construction is provided.

[0026]

As described above, according to the first aspect of the present invention, the sides of the congruent quadrilateral segment (when developed on a plane) having sides parallel to the sides perpendicular to the tube axis in the tube axis direction are provided. Are shifted at equal intervals in the pipe axis direction along, sequentially, in each of the adjacent quadrangular segments arranged in a step-like manner, all the corner portions protruding into the step-like shape are removed into a congruent right-sided triangle, and the remaining portions are removed. When the congruent hexagonal segments are spirally assembled, the ring advances forward in the tube axis direction by a distance slightly shorter than the width of the hexagonal segments per ring, and is continuously assembled. The position in the circumferential direction is shifted to the succeeding side by the length of the side perpendicular to the tube axis of the right-angled triangle with the corners protruding stepwise between the rings removed, and the number of hexagonal segments constituting the ring (decimal point is After assembling the ring only to return to the same position as the original, the arrangement of the shield jack and the shield jack without changing the captain and shield jack stroke of the conventional shield excavator By devising the jack operation pattern, it is possible to cope with continuous excavation, and an efficient pipe construction is provided.

According to a second aspect of the present invention, a congruent parallelogram segment having sides perpendicular to the tube axis (when developed on a plane) is shifted at equal intervals in the tube axis direction along the oblique side in the tube axis direction. From adjacent parallelogram segments that are sequentially arranged in a stepwise manner, all acute angles protruding into the stepwise shape are removed into a congruent triangle, and the remaining congruent hexagonal segments are spirally assembled. The ring is advanced by the width of the hexagonal segment, and the circumferential positions of the hexagonal segments that compose the subsequent ring are continuously aligned with the initial position. By changing the shield jack arrangement and shield jack operation pattern without changing the captain and shield jack stroke, It can be efficient Kanmizo construction is provided.

[Brief description of the drawings]

FIG. 1 is a development view of a sewer in a process of manufacturing a first segment according to the present invention.

FIG. 2 is a development view showing a basic concept of a first segment according to the present invention.

FIG. 3 shows a first segment (after correction) according to the present invention.
FIG.

FIG. 4 is a development view of a sewer constructed using the second segment according to the present invention.

FIG. 5 is a development view showing a basic concept of a second segment according to the present invention.

[Explanation of symbols]

A _{0 to} D ₀ right-angled quadrilateral segment A _{1 to} D ₁ , A _{2 to} D ₂ congruent hexagonal segment E, F congruent right-angled triangle

[Procedure amendment]

[Submission date] December 6, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

Claims (4)

[Claims] 1. A concentric rectangular quadrangular segment having sides parallel to a right angle with respect to a tube axis, which are arranged at equal intervals along the tube axis direction along sides in the tube axis direction, and are sequentially arranged in a stepwise manner. Of the adjacent quadrangular segments that are adjacent to each other, remove all the corners that protrude into a step shape into a congruent right triangle,
When the remaining congruent hexagonal segments are assembled in a spiral, the width of the hexagonal segments per ring is slightly
The hexagonal segments that make up the ring after advancing a short distance in the pipe axis direction and subsequently assembling continuously are in the circumferential direction.The right-angled triangular pipe axis with the corners protruding stepwise between the rings removed. A segment which is shifted toward the succeeding side by the length of a side perpendicular to the ring, assembled into the ring by the number of hexagonal segments constituting the ring, and then returned to the same position as the beginning. 2. A parallel parallelogram segment having sides perpendicular to the tube axis, which are displaced at equal intervals along the tube axis direction along the oblique side in the tube axis direction, and are sequentially arranged in a stepwise manner to form adjacent parallel lines. Of the quadrilateral segments, all the acute angles protruding into the step shape are removed in a congruent triangular shape, and the remaining congruent hexagonal segments are assembled into a spiral to advance the width of the hexagonal segment per ring and continue continuously. A segment characterized in that the circumferential positions of the hexagonal segments constituting the ring after assembly are aligned with the same positions as the first. 3. A sewer comprising the segment according to claim 1. 4. A sewer comprising the segment according to claim 2.