JPH06158989A - Rail - Google Patents

Abstract

PURPOSE:To improve workability by automatically expanding and contracting a rail according to expansion and contraction among structures when the rail is laid on the structures repeatedly moved in order from a head rail at the distance of expansion and contraction of approximately 30cm or more as caisson bodies continuously arranged at intervals. CONSTITUTION:When expansion and contraction sections are installed on their midways of rails 3, 4 fixed to separately moved structures 1, 2, the rails 3, 4 fastened to each structure 1, 2 are constituted separately. Rail materials 11a, 11b having the shape of the approximately half of a shape in the longitudinal direction are mounted at the end sections of both rails 3, 4, and the rail materials 11a, 11b are connected slidably in the longitudinal direction, thus forming the expansion and contraction sections.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail laid on a moving structure such as a box in a propulsion method.

[0002]

2. Description of the Related Art As one of the propulsion methods for pushing a concrete box into the ground to construct a tunnel-like underground structure,
An infinite self-propelled forward construction method as shown in FIG. 7 is known. This is a large number (3
(More than one) concrete boxes 21 are arranged, and a propulsion jack 22 is arranged between the boxes 21.

Further, a hood-like blade 23 is attached to the tip of the leading box 21, a PC steel wire 24 is arranged so as to penetrate all of the boxes 21, and a fixing tool 25 and a fixing tool 25 are provided at the ends thereof. Tow jack 26
Set up. Each box body 21 is provided with a hood-like skirt 27 at the rear end except for the rearmost one, and the skirt 27 is slidably engaged with the front end of the box body 21 continuing to the rear.

In this way, the portion of the blade opening 23 is excavated, and the stroke of the propulsion jack 22 provided between the box body 21 at the front and the box body 21 at the rear of the box body is extended and moved forward by a fixed amount, and the whole box is opened. If the body 21 advances by a certain amount, the same operation is repeated from the beginning. In that case, in order to move the first box body 21 forward, the fixing tool 25 and the towing jack 26 are made free, and the friction resistance due to the own weight of the rear box body 21 and the earth pressure is used as a reaction force to move the first box body. The propulsion jack 22 between 21 and the second box 21 is activated.

Next, the second box 21 is moved forward by the fixing device 25.
And tow jack 26 fixed to PC steel wire 24, and tow jack
26 is operated to tension the PC steel wire 24, and the first box 21 and the third box 21 are reacted with the propulsion jack 22 between the second box 21 and the third box 21 as a reaction force. .

When the third box 21 is moved forward, the first box 21 and the second box 21 are acted as reaction forces and the towing jack 26 is operated to pull the box.

However, if the propulsion jacks 22 are arranged between the boxes by such a propulsion method, the number of the propulsion jacks 22 becomes very large and the cost becomes high. It is also necessary to have a structure in which it is mounted and supported on either one of the front and rear boxes 21.

Therefore, as shown in FIG. 8, a rail is erected on the bottom plate inside the concrete boxes 21 arranged in a row, and the propelling jack 22 is provided horizontally and vertically movable on the carriage 29 traveling on the rail 28. Can be considered.

In this way, the propulsion jack 22 can be freely moved in the box body 21 by the self-propelled carriage 29, and can be moved to a necessary place between the box bodies 21 and horizontally moved. When the horizontal jacks are aligned and the propulsion jack 22 is moved upward and downward, the propulsion jack 22 is moved to the box 21.
The number of propulsion jacks 22 can be set to a necessary minimum, and the cost can be reduced.

[0010]

In this way, the jack 22 is placed between a large number of boxes 21, and the stroke of the jack 22 is extended from the top box 21 to make the box look like a scale insect. In the construction method of pushing into the box, the propulsion amount of the box 21 is about 30 cm or more, but the box that moves sequentially like this
When a track device such as a rail 28 or a bogie 29 is installed on an object such as 21 in which the distance between the structures changes by a constant length, the length of the rail 28 must be correspondingly changed.

By the way, as a rail having an expansion / contraction portion in the middle, conventionally, for example, there is a rail which cuts the rail obliquely and copes with a temperature change and adjusts the amount of change by sliding.

Since the amount of change with temperature is very small, the amount of expansion and contraction is also small. Therefore, it is difficult to apply the above-mentioned conventional technique to a rail laid on a structure that moves about 30 cm like a box, and in such a case, it means that the rail is laid again, etc. Workability was not good.

The object of the present invention is to eliminate the disadvantages of the above-mentioned conventional example, and to provide a structure which is repeatedly moved in order from the beginning with an expansion / contraction distance of about 30 cm, such as a box which is continuously arranged at intervals. The purpose of the present invention is to provide a rail that can be improved in workability by automatically expanding and contracting in response to expansion and contraction between structures when the rail is laid.

[0014]

In order to achieve the above-mentioned object, the present invention separates the rails fixed to each structure when an expansion / contraction part is provided in the middle of the rails fixed to the individually moving structures. It is configured as a body, and a rail member having a substantially half shape in the lengthwise direction is provided at the ends of both rails, and the rail member is slidably joined in the lengthwise direction to form a stretchable portion. It is what

[0015]

According to the present invention, a rail member having a substantially half shape formed at the end of the rail fixed to each structure is joined to form a shape similar to the fixed portion of the rail in the contracting portion, The wheels of the track device can run on this. When one structure moves and the distance between the structures changes, the rail material parts of both rails slide with each other, the expansion and contraction part expands by the moving stroke of the structure, and the other structure If it moves following, the expansion / contraction part will contract accordingly.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a plan view showing a contracted state of a rail of the present invention, and FIG. 2 is a plan view of the same in an expanded state. The rail of the present invention is straddled over structures 1 and 2 such as a box that move sequentially. The rail 3 and the rail 4 are provided.

The rail 3 is fixedly laid on the upper part of the structure 1, and the left end is located near the end of the structure 1 in the traveling direction and the right end is located slightly inside the right end of the structure 1. As shown in FIG. 3 as a sectional view taken along line AA of FIG. 1, the basic structure of the main body of the rail 3 is composed of a lower plate 5 and an upper square steel 6 which are conventionally known structures, and an anchor bolt 9 is used. Rail presser 8 on pillow 7 fixed to structure 1
Fix the plate 5 with.

The right end of the rail 3 is a rail member 11a having a shape in which the square steel 6 and the plate 5 are vertically cut in half and the left half is cut off as shown in FIG.
To form. In this case, the square steel 6a is formed to have a diameter half that of the square steel 6, the plate 5a is formed to have substantially the same diameter as the plate 5 in consideration of strength, and a reinforcing rib 10a is provided depending on the case. Then, this rail material 11a is also fixed to the pillow material 7 by the rail retainer 8 in the same manner as the main body portion. In this way, the rail 3 is fixed on the structure 1.

The rail 4 is laid across the structures 1 and 2. The right end is fixed to the forward end of the structure 2, that is, the left end, and the left half is attached to the structure 1. Continue to rail 3. The basic structure of the main body of the rail 4 is composed of the plate 5 and the square steel 6 as in the case of the rail 3, and the fixed portion to the structure 2 is such that the rail 4 can rotate horizontally with respect to the pillow 7. As described above, the pin 12 has a hinge structure.

The main body of the rail 4 laid on the structure 1 side is slidably installed on the pillow 7 fixed to the structure 1 with anchor bolts 9.

Similar to the right end of the rail 3 of the rail 4, FIG.
As shown in FIG. 5, the square steel 6 and the plate 5 are longitudinally cut in half and cut into half to form a rail material 11b.
In this case, the square steel 6b is formed to have a diameter half that of the square steel 6, the plate 5b is formed to have substantially the same diameter as the plate 5 in consideration of strength, and a reinforcing rib 10b is provided depending on the case. Then, the rail material 11b is slidably installed on the pillow material 7 with the rail retainer 8, slidably joined to the side surface of the rail material 11a on the rail 3 side, and the square steel is combined with the square steels 6a and 6b. The expansion / contraction part is configured to have the same shape as that of No. 6. In the figure
Reference numeral 13 indicates wheels of the track device.

Next, the operation will be described. In FIG. 1, the side surfaces of the rail members 11a and 11b are almost in contact with each other, and the rails 3 and 4 are in a contracted state. When the structure 1 at the tip is propelled from this state by a certain distance, for example, 30 cm, the rail 3 fixed on the structure 1 also moves forward accordingly. At this time,
Since the other structure 2 does not move, the rail 4 does not move forward, and only the rail material 11a on the rail 3 side moves forward while sliding on the side surface of the rail material 11b of the other rail 4, as shown in FIG. The contact surface between the rail material 11a and the rail material 11b is reduced, and the rail extends as a whole. At this time, the pillow 7 supporting the rail 4 on the structure 1 moves forward while sliding with the rail 4 as the structure 1 moves forward.

From this state, when the structure 1 at the tip is not moved next and only the structure 2 following is propelled, the end of the rail 4 is fixed to the structure 2, so that the structure 2 can be moved forward. Along with this, the rail material 11b of the rail 4 slides forward on the pillow material 7 on the structure 1 while sliding on the rail material 11a.
The contact surfaces of a and 11b become large and the rail contracts as a whole.

When propelling the structures 1 and 2 individually, even if the traveling direction is slightly deviated to the side, the rail 4 is laterally moved because the end of one rail 4 is hinged by the pin 12. It is possible to prevent the joint surfaces of the rail members 11a and 11b that rotate in the direction and form the sliding portion with the other rail 3 from separating from each other.

As described above, as the structures 1 and 2 are propelled, the rails 3 and 4 fixed to the structures 1 and 2 also move forward while automatically contracting. Further, since the contracting portion is formed in the same shape as the main body portion when the rails 3 and 4 are joined, the traveling of the wheels 13 of the track device on the rails 3 and 4 is not hindered.

[0026]

As described above, the rail of the present invention can be mounted on a structure which is repeatedly moved in order from the leading one at an expansion / contraction distance of about 30 cm, like a box which is continuously arranged at intervals. When laying the rails on and off, the workability can be improved by automatically expanding and contracting in response to expansion and contraction between structures.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of a rail of the present invention in a contracted state.

FIG. 2 is a plan view showing an embodiment of the rail of the present invention in an expanded state.

FIG. 3 is a sectional view taken along the line AA of FIG. 1 showing an embodiment of the rail of the present invention.

FIG. 4 is a sectional view taken along line BB in FIG. 1 showing an embodiment of the rail of the present invention.

5 is a cross-sectional view taken along line CC of FIG. 1 showing an embodiment of the rail of the present invention.

FIG. 6 is a cross-sectional view taken along the line DD of FIG. 1, showing an embodiment of the rail of the present invention.

FIG. 7 is a side view showing an infinite self-propelled forward construction method.

FIG. 8 is a side view showing an example of the advancing device in the infinite self-propelled advancing method.

[Explanation of symbols]

1 ... Structure 2 ... Structure 3 ... Rail 4 ... Rail 5,5a, 5b ... Plate 6, 6a, 6b ... Square steel 7 ... Pillow material 8 ... Rail retainer 9 ... Anchor bolt 10a, 10b ... Reinforcing rib 11a, 11b ... Rail material 12 ... Pin 13 ... Wheel 21 ... Box 22 ... Propulsion jack 23 ... Blade 24 ... PC steel wire 25 ... Fixing tool 26 ... Towing jack 27 ... Skirt 28 ... Rail 29 ... Bogie

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toru Ikeda 1-3-15 Awaza, Nishi-ku, Osaka City, Osaka Prefecture Kashima Construction Co., Ltd. Osaka Branch (72) Inventor Susumu Ando 1-3-3 Awaza, Nishi-ku, Osaka City, Osaka Prefecture No.15 Kashima Construction Co., Ltd. Osaka Branch (72) Inventor Toshio Funasako 1-3-3 Awaza, Nishi-ku, Osaka City, Osaka Prefecture Kashima Construction Co., Ltd. Osaka Branch

Claims (1)

[Claims] 1. When a telescopic portion is provided in the middle of a rail fixed to a structure that moves individually, the rail fixed to each structure is formed separately, and the ends of both rails are lengthwise. The rail is characterized in that a rail member having a shape approximately half of the above is provided, and the rail member is slidably joined in the length direction to form an expandable portion.