JP2599071B2 - Structure of crosswalk for dam embankment construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passage for moving from a movable scaffold to a fixed staircase, and more particularly to an ascending and descending formwork device which moves up and down along an inclined surface of a dam embankment in construction work of the dam embankment. It is used as a walkway for workers to move, to transport materials and equipment, and to assemble formwork for concrete work from a work platform to a temporary fixed staircase along the slope of the dam embankment. It is about structure.

[0002]

2. Description of the Related Art Conventionally, in the construction work of a concrete dam, a work scaffolding integrally provided at a lower end of an elevating formwork device which moves up and down along a slope of a dam embankment under construction is used to construct a slope of the dam embankment. As shown in FIG. 5, to reach the fixed stairs provided in the vertical
A ladder 35 is erected from an appropriate place in the width direction of the working scaffold 33 horizontally erected at the lower end of the ladder 35, and the lower end of the ladder 35 is brought into contact with the upper end of the fixed stairs 34 to perform the ladder 35. .
The ladder 35 is fixed to the work platform 33 by an appropriate fixing member 36 or a binding material such as an iron wire, and
It goes up and down integrally with

[0003]

However, in the structure of such a crossing path from the work scaffold 33 to the fixed stairs 34 by the ladder 35, the elevating formwork device 32 is raised with the construction of the dam embankment 31. And the ladder hanging from the work scaffold 33
There has been a problem that the fixed stairs 35 cannot be used as a passage until the extension of the fixed stairs 34 toward the lower end of the moved ladder 35 is completed. Such a problem can be solved by connecting and extending the fixed stairs 34 by the rising pitch of the elevating formwork device 32 in advance, but the ladder 35 hinders the extension work of the fixed stairs 34. If the ladder 35 is not removed, the fixed stairs 34 cannot be extended, and during that time, there is a disadvantage that the fixed stairs 34 cannot be used as a passage.

The present invention has been proposed in order to solve such a problem, and a work scaffold attached to an elevating formwork device which is raised with the construction of a dam embankment moves. In addition, a passage from the work scaffold to the fixed stairs provided on the inclined surface of the dam embankment can be secured without interruption, and the structure of the crossing passage for dam embankment construction that can be used even during the work of adding the fixed stairs. The purpose is to provide.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a structure of a crossing passage for building a dam embankment of the present invention comprises a lift-type formwork apparatus which moves up and down along a slope of a dam embankment being built. A crossover passage from a work scaffold integrally provided at the lower end to a fixed staircase extending along the slope of the dam embankment according to the construction of the dam embankment, and the crossover passage is formed in a step shape. The upper end is fixed in place of the work scaffold and the lower end is movable along the side surface of the fixed stairs as the elevating type form device is moved up and down.
The length of the transfer passage is set so that the distance between the lower end of the transfer passage and the lower end of the lift-type form device is equal to or greater than a one-step movement pitch of the lift-type form device that rises stepwise according to the construction of the dam embankment. It is characterized by having been set.

[0006]

[Function] A stair-like cross-passage installed at a suitable place on a work scaffold that rises integrally with the elevating formwork device with the construction of the dam embankment, with its lower end fixed to the slope of the dam embankment Since it extends along one side of the stairs, it does not hinder the extension and extension work of the fixed stairs, and can be used as a crossing passage even during the work. Furthermore, since the length of the transfer passage is set so that the distance from the lower end of the transfer passage to the lower end of the lift-type form device is equal to or greater than the movement distance of one step of the lift-type form device, Before ascending the formwork apparatus, the fixed stairs corresponding to the length equal to or longer than the next ascending distance of the elevating formwork apparatus can be added, and therefore, the elevating formwork apparatus is moved to the next concrete placing position. However, the work can be immediately performed using the passage from the work platform to the fixed stairs.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
FIG. 1 shows a cross-section from a working scaffold 3 erected integrally with an elevating formwork device 2 which rises and lowers along a slope of a concrete dam embankment 1 to a fixed staircase 4 erected along the slope of the dam embankment 1. FIG. 1 shows a crossover passage 5 provided in a vehicle. A formwork device for constructing a dam embankment body 1 includes a formwork panel 2a and a plurality of horizontal members provided at regular intervals to hold the formwork panel 2a. It is composed of a thick end member 2b and a vertical end thick member 2c, and is provided with a suitable lifting device (not shown) for raising and lowering the form device in the slope direction of the dam embankment body 1 by means of this form device. This constitutes the formwork device 2. The vertical end thick member 2c of the formwork device is fixed to the dam embankment 1 under construction by a fixing device such as an anchor bolt, and has a structure in which the fixing device is detached when ascending and descending and can be moved up and down.

The work scaffold 3 which is disposed along the lower end edge of the elevating form device 2 over substantially the entire length thereof is provided with one end edge of the scaffold plate 13 in the longitudinal direction of the elevating form device 2. Vertical end thick wood
It is fixed to the lower end of 2c in a erected state and horizontally extends toward the slope of the dam embankment 1, and a handrail 3a having an appropriate height is erected on the other end edge of the projecting end. On the other hand, the fixed stairs 4 are extended from the bottom of the dam embankment 1 on the slope of the embankment along with the construction of the dam embankment 1, and are fixed on the slope of the dam embankment 1 by fixing tools such as anchor bolts. In addition, a step portion is connected to and extended from the upper end of the dam embankment body 1 every time a predetermined height portion is constructed.

The crossing passage 5 provided between the work scaffold 3 and the fixed staircase 4 includes a passage portion 5a formed in a step shape,
A support frame 5b for supporting the passage portion 5a, a support frame fixing member 5c for fixing the support frame 5b to the elevating mold device 2, and a handrail of an appropriate height standing on both side edges of the passage portion 5a 5d, the stepped passage portion 5a is fixed and supported on a support frame 5b, and the support frame fixing member 5c is provided with two vertical ends 2c of the vertical end thick members 2c of the vertically movable form device 2. The upper ends of the end members 2c and 2c are integrally fixed to the lower ends thereof by fixing members such as bolts and nuts, and the lower ends of the support frames 5b are fixed in an upright state between these fixing members 5c and 5c. ing.

[0010] Further, the lowermost tread plate 15 in the passage portion 5a of the transfer passage 5 is disposed so as to be opposed to one side surface of the fixed stairs 4 in a close state, and the transfer passage 5 is moved up and down. At the time of ascent with the step 2, the tread plate 15 is configured to move along one side surface of the fixed staircase 4. In addition, migration passage 5
The uppermost tread plate 25 communicates with the scaffold plate 13 at an appropriate position of the work scaffold 3, and the connecting plate 6 is bridged between the tread plate 25 and the scaffold plate 13. One end of the connecting plate 6 is connected to the scaffold plate 13,
The other end is detachably connected to the tread plate 25 by a connecting member such as a bolt and a nut or an iron wire. The connecting plate 6 is used in accordance with the size of the gap between the scaffold plate 13 of the work scaffold 3 and the uppermost tread plate 25 of the cross passage 5. If there is no gap, the scaffold plate 13 and the tread plate 25 are used. May be directly connected.

As shown in FIG. 2, the lowermost tread plate 15 of the crossing passage 5 and the vertical end thick member 2c of the elevating formwork device 2 are used.
The length of the crossover passage 5 is set so that the distance L between the lower ends is equal to or greater than the moving distance of one step of the elevating formwork device 2 that is raised according to the construction of the dam embankment 1. The mounting structure of the supporting frame fixing member 5c of the crossover passage 5 with respect to the lower end of the vertical end thick member 2c of the elevating type frame device 2 includes a plurality of bolts at appropriate intervals in the longitudinal direction of the vertical end thick member 2c. A mounting hole is provided, or the bolt mounting hole is formed as a long hole and
The mounting position of the support frame fixing member 5c with respect to the length direction is configured to be adjustable, so that the distance L can be adjusted.

In the structure of the cross passage constructed as described above,
A work scaffold attached to the up-and-down formwork device 2 in the construction of the dam embankment 1 by casting concrete while moving the up-and-down formwork device 2 diagonally upward at a predetermined pitch. From 3, a worker moves and transports materials and equipment through a passage 5 to a fixed staircase 4 erected on the slope of the dam body 1. At this time, in parallel with the formwork assembling work using the work scaffold 3 or the concrete placing work on the assembled formwork apparatus, the fixed stairs 4 are inclined upwardly as shown in FIG.
As shown in the figure, a step portion having a length corresponding to the interval L
Perform 14 additional work.

The work of adding the stairs 14 has been completed before the elevating form device 2 is moved to the next stage, and then the elevating form device 2 is moved to the next dam embankment portion at a predetermined position. When the distance is increased, the crossover passage 5 integrally fixed to the elevating formwork device 2 also moves upward along one side surface of the stair portion 14 to which the lowermost tread plate 15 is added. As shown in FIG. 3, the vehicle stops at a position one step before the uppermost step of the staircase section 14. From this state, concrete is poured into the elevating formwork device 2 again in the same manner as above to build a dam embankment portion, and the next stair portion is added to the upper end of the stair portion 14 during that time.
This is repeated to build the dam body 1.

In the above embodiment, the crossing passage 5 is arranged in a direction intersecting the fixed staircase 4.
As shown in (1), a staircase-shaped crossing passage 5 may be arranged on one side surface of the fixed staircase 4 in parallel. That is, the distance L between the lowermost tread plate 15 of the crossing passage 5 and the lower end of the vertical end thick member 2c of the elevating formwork device 2 is equal to or more than the moving distance for one step of the elevating formwork device 2. A transfer path 5 having a certain length
It is disposed along the slope of the already built dam embankment in the slope direction, and the upper end of the crossing passage 5 is fixed to a proper position of the work scaffold 3 erected at the lower end of the elevating formwork device 2. At the same time, the lower end is parallel to one side surface of the fixed staircase 4. Therefore, in this embodiment, the lower surface of the crossover passage 5 can be slid and received on the slope of the dam embankment 1, so that the support frame 5b and the support frame fixing member 5c shown in the above embodiment can be used. do not need. The rest of the structure and the manner in which the steps 14 are added are the same as in the above embodiment.

[0015]

As described above, according to the crossing passage for building a dam embankment of the present invention, the dam embankment can be moved from the working scaffolding integrated with the elevating formwork device that moves up and down along the slope of the dam embankment being built. A stairway is formed in a stair-like passage for crossing to a fixed staircase extending along the slope of the body, and an upper end thereof is fixed to an appropriate position of the work scaffold frame, and a lower end thereof is formed along one side of the fixed staircase. Since the movable form is movable along with the elevation of the elevating formwork device, the crossing passage is arranged at a position deviating from the direction of replenishment of the fixed stairs, so that the extension of the fixed stairs is not hindered. Therefore, it can be used as a crossing passage even during the work.

Further, the length of the transfer passage is set such that the distance from the lower end of the transfer passage to the lower end of the lift-type form device is equal to or greater than the moving distance of one step of the lift-type form device. Therefore, before the ascending and descending formwork apparatus is lifted, the fixed stairs corresponding to the length equal to or longer than the next ascending distance of the ascending and descending formwork apparatus can be added. Therefore, the ascending and descending formwork apparatus is moved to the next concrete placing position. Even if it is moved to a location, it is possible to use the passage immediately from the work scaffold to the fixed stairs, and it is possible to efficiently construct the dam embankment.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention;

FIG. 2 is a side view showing a state where fixed stairs are added.

FIG. 3 is a side view of a state in which the elevating formwork device is raised by one stage;

FIG. 4 is a perspective view showing another embodiment of the present invention;

FIG. 5 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 Dam embankment 2 Elevating formwork device 3 Work scaffold 4 Fixed stairs 5 Crossing passage

Claims (1)

(57) [Claims] 1. A work scaffolding integrally provided at a lower end of an elevating formwork device which rises and falls along a slope of a dam embankment under construction according to the construction of the dam embankment along the slope of the dam embankment. A crossing passage for crossing to a fixed stair to be extended, the crossing passage being formed in a step shape, and having an upper end fixed to an appropriate position of the work scaffold and a lower end to one side surface of the fixed stair. Along with the lifting and lowering of the elevating formwork device, and furthermore, the distance between the lower end of the crossing passage and the lower end of the elevating formwork device is raised stepwise according to the construction of the dam embankment. A structure of a cross passage for building a dam embankment, wherein a length of the cross passage is set so as to be equal to or more than a one-step movement pitch of the formwork device.