JPH08338131A - Form support construction and execution method thereof - Google Patents

Abstract

PURPOSE: To move a form support without separating it by separating the upper part and the lower part of a form support from each other at a little under a strut part, confronting hand jack bases with each other so as to integratedly join them together, and rotating a hand jacks. CONSTITUTION: An upper form support pillar 5a is constructed capably of being separated from the upper parts, and inserting members 7 with flange are inserted in the separating parts by stroke by which the upper form support 5a can be hollowed. Hand jacks are fitted to the lower part of the upper form support pillar 5a and the upper part of a lower form support pillar 5b. Bases 8 of both hand jacks are integratedly fastened together through bolt/nut 9, hence, when the form support is moved, both hand jack handles 10 are rotated, and it is lowered by the stroke necessary for hollowing. The form support pillar is drawn from the hollow and dodged about a strut, a horizontal connection 11 is detached so as to dodge a vertical temporary pillar, and turning is repeated so as to move the form support.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] The present invention relates to a formwork support structure and a construction method for constructing an upper floorboard (slab) of an underground structure having a box-shaped cross section (for example, a structure such as a subway, an underground road, a common ditch).

[0002]

2. Description of the Related Art Conventionally, in the case of constructing an underground structure having a box-shaped cross section, the construction has been performed by dividing one construction into certain units (1 span) for all extensions to be constructed. That is, when the construction for one section is completed, the formwork support is moved to the next construction section and the formwork support is constructed again. Slab construction was carried out by repeating this process, but it would be labor and time inefficient to assemble and disassemble the formwork support work each time.

Therefore, a method has been adopted in which the form supporting work is moved while maintaining the required shape.

FIG. 11 is a plan view of the form support of a box-shaped structure. FIG. 12 is a vertical sectional view of FIG. In order to construct an underground structure having a box-shaped cross section, for example, a girder 15 (lateral direction) for receiving a load (sidewall load) of a temporary earth retaining wall, or a vertical temporary column 21 for supporting a road surface lining load
(Vertical direction) etc. are installed at intervals of about 2 to 3 m.

The formwork support which receives the load of the slab is erected in the space formed by the temporary material, that is, the beam 15 (horizontal direction) or the vertical temporary column 21 (vertical direction) for supporting the road surface lining load. Has been done. Therefore, if it is attempted to move the form supporting member while it is erected, it cannot be moved as it is because it interferes with the temporary material. Therefore, the movement of the formwork support work is performed by dividing it into blocks divided by the erection material (cut beam 15, vertical temporary column 21). Note that the divided form supporting work receives an overload when the concrete of the slab 20 is cast, so that the divided structure must be integrated each time in order to obtain rigidity.

Further, in order to facilitate the movement of the split formwork support work, a moving device is provided under each of the split formwork support work to save labor. The moving device is a rail / wheel system for the blocks below the cross beam 15 (temporary material in the lateral direction), and the wheels with V-grooves at the lower part of the formwork support work on rails made of angle steel, for example. It is a movable structure.

Upper formwork support (block above beam)
Is a saddle roller system. In the saddle-roller structure, a roller is removably mounted on the sill beam 15, and the upper frame support is mounted on the saddle made of, for example, channel steel, and the roller is mounted on the roller. The structure is such that the upper formwork support can be moved.

However, these moving devices and related members have a complicated structure, and the desorption work is complicated and dangerous because it involves lifting and lowering work of heavy objects. The movement power of the formwork support work was, for example, a towing system using a winch.

[0009]

The above-mentioned conventional method has the following problems.

(B) Since the movement is divided into blocks and carried out separately, for example, in the case of 6 divisions, approximately 6 times as much construction work is required as compared with the case where no division is made, and the construction efficiency is increased. Remarkably bad.

(B) A moving device is required for each of the divided form supporting works, and the work of laying and removing the rail is required for each movement, resulting in poor construction efficiency. Especially above the girder 15,
The moving device and related members of the upper form support work have a complicated structure, and the work is complicated and labor is useless.

(C) The moving device and the related members of the upper form supporting work are hoisted and hoisted with the construction of these,
The number of heavy work tasks such as desorption increases the number of dangerous work factors.

(D) In addition, since the girder 15 bears the side wall load during the construction of the underground structure, it is a principle that the load such as the formwork support work is not overlaid, but in this case, it is made into a block. Since the weight of the formed frame supporting work is mounted on the cutting beam 15, an extra provisional column is needed so that the cutting beam 15 can support the mounting weight, and the attaching and detaching work is required.

(E) Since the moving device is of a rail type, it is difficult to make fine adjustments such as lateral movement at right angles to the moving direction, and labor is required for such fine adjustments.

The present invention has been devised to solve the above problems.

[0016]

[Means for Solving the Problems] In a formwork support structure, when the formwork support is moved, in order to avoid interference with a cutting beam or a vertical temporary column which is a temporary material, the formwork support work is performed. Props,
The upper formwork support and the lower formwork support are separated at a position slightly lower than the portion where the cutting beam is located, and the upper part of the upper formwork support column is also separable, and the separated portion of the upper formwork support column is separated. Insert the collared insert member into the upper formwork support pillar by a stroke that allows the hollowing of the upper formwork support pillar, attach a hand jack to the lower part of the upper formwork support pillar, and attach the lower formwork support pillar to the lower formwork support pillar. The hand jacks are also attached to the upper part, and the bases of the both hand jacks are fastened and integrated with bolts and nuts. When moving the form support, the both jacks are rotated by turning the hand jack handle 10. Lower the stroke required for pulling out, formwork support pillars are hollowed out, cross beams are crossed, horizontal joints are removed, vertical temporary pillars are crossed, and the formwork support work is moved by repeating refilling. And the construction method.

Further, in the formwork supporting structure, a plurality of oil jacks are formed by forming a lower part formwork supporting part below the portion where the beam is located, and by forming a plurality of oil jacks on the lower formwork supporting structure. A frame is placed, an upper frame support is installed on the upper part of the oil jack frame, and the oil jack frame is repeatedly refilled at the part of the cross beam that interferes with the movement of the frame frame support. The structure and construction method is to remove the horizontal connection at the pillar and repeat the refilling to move the form support.

In the formwork support structure, a plurality of wheels are provided below the lower formwork support column, and the formwork support is composed of an assembled truss.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The formwork support structure and construction method of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing a hollow structure of the form support pillar 5. The formwork supporter 14 is composed of assembled trusses,
Moreover, the upper formwork support 14a and the lower formwork support 14b are separated from each other just below the portion where the cutting beam 15 is located.
The upper formwork support 14a includes the large support joint 6 at the bottom of the large support handjack 4 and the upper formwork support 14a.
At the separated portion of a and the lower formwork supporting structure 14, the flanged support member insertion member 7 which is inserted into the upper formwork supporting support member 5a is inserted by a stroke for hollowing. A hand jack provided with a hand jack base 8 is attached to the lower part of the upper form supporting member 5a. A hand jack having a similar hand jack base 8 is attached to the lower formwork support pillar 5b, and the handjack base 8 attached to the upper formwork support pillar 5a and the lower formwork support pillar 5b. The hand jack base 8 attached to the above is fastened with the bolts and nuts 9 to integrate the upper frame support work 14a and the lower frame support work 14b.

When attempting to move the formwork support 14 to the right, the beam 15 and the formwork support column 5 interfere and cannot move. Therefore, the upper formwork support pillar 5a is hollowed out, but the handjack handle 10 is operated to lower the upper formwork support pillar 5a downward.

That is, if the upper formwork support pillar 5a is lowered by the amount of the detaching stroke, the upper formwork support pillar 5a can be hollowed out. Details of the detachable portion are shown in FIG.

Here, in order to hollow out the upper formwork support pillar 5a, the end of the upper formwork supportwork 14a may be in the state of a cantilever, but the formwork supportwork is assembled into a truss structure. Therefore, sufficient rigidity can be maintained.

FIG. 6 is a front view of the moving device for the entire form supporter 14. Wheels 16 are provided below the lower formwork support 14b.
And the wheel frame 16a is attached. When moving the formwork support, the jack base 12 is rotated, the jack base 12 is pulled up, and the wheels are moved in a state in which the wheels bear the top load. Since the wheels are also rotatable in any direction and do not move on the rails as in the conventional case, the movement direction is not restricted by the rails, so it is possible to deal with lateral deviation and the position of the frame supporter 14 can be adjusted slightly. Easy to adjust. FIG. 7 is a side view of FIG. After the frame support 14 is moved, when the position of the frame support is determined, the handjack base 12 is lowered and the wheels 16 and the wheel frame 16a are removed.

Next, the method of moving the form support 14 will be described.

FIG. 2 is a side cross-sectional view of a box-shaped underground structure and a form supporting structure, in which two upper form supporting supports on the left side of the form supporting structure 5a are hollowed out. Form support 14
After constructing the slab for one span, the formwork support 14 is sequentially moved to the right to build a continuous slab concrete, but the entire formwork support is interfered with by the cutting beam 15 which receives earth pressure on the side wall. It is impossible to move at once. Therefore, the formwork support 14 is located above the gantry 15
It is assumed that a and the lower frame support 14b below the beam are joined and integrated.

When the form support 14 is moved to the right, the form support column of the upper form support 14a located on the left side of the cross beam 15a which interferes during movement is hollowed out. FIG. 2 shows an upper formwork support pillar which constitutes a formwork support 14 of one span.
It shows a state where the book is pulled out.

Next, the entire formwork support 14 is moved to the right to the cross beam 15b. Fig. 3 shows the form support 14 up to the girder 15b.
It is the figure which moved.

The formwork support pillar on the left side of the cutting beam 15b is again hollowed out, and the formwork support pillar is installed on the right side of the cutting beam 15b.

FIG. 4 is a view showing that the form support pillars located on the left side of the cutting beam 15b are erected on the right side. Then in FIG.
Is a diagram in which the form supporting member 14 is moved until the form supporting member support pillar is located on the left side of the cutting beam 15b as described above.

After that, this operation is repeated in order and the form support 1
Move 4 to the right.

FIG. 8 shows the oil jack frame 1 by further streamlining the hollowing of the form support pillar using the hand jack.
9 upper frame support 14a and lower frame support 14b
It is a figure which shows the Example completely separated. The form support 14 is moved to the right from the right side of the cutting beam 17a to the left side of the cutting beam 17b, and then FIG. 9 shows that the oil jack 18a that interferes with the cutting beam 17b is contracted when the form supporting system is moved to the right side. It is the figure which showed the place where the cross beam 17b intersects.

FIG. 10 is a view showing that the oil jack 18a is exchanged and refilled, the oil jack 18b is contracted, and the cross beam 17b is exchanged.

Thereafter, this operation is sequentially repeated to move the entire mold support 14 to the right side.

The vertical temporary columns, which are temporary members, are repeatedly refilled with horizontal joints, which have been reduced in number to a required number, and the form support 14 is moved as a whole. Since a large load is not applied to the horizontal tie material, the number is small during movement, which is easier than refilling the beam section.

[0036]

The effects of the present invention are as follows.

(A) When moving the formwork support work, it is no longer necessary to move each block divided by the erection material (cut beams, temporary columns). By hollowing out the formwork support pillars or refilling the oil jack frame, it became possible to move as a whole without suffering from the interference of the cutting beams of the formwork support work.

(B) Since the formwork supporting structure which has been a torii frame structure in the past is an assembled truss structure, the formwork supporting work that occurs when hollowing out the formwork supporting column or applying an oil jack frame is performed. The cantilever structure of can also have sufficient rigidity. Therefore, it became possible to temporarily remove and restore (refill) the member at the location where the temporary material and the frame support pillar interfered with the movement of the frame support.

(C) Since the assembled truss structure is adopted, it is possible to attach / detach any member, and it is possible to flexibly cope with changes in the width direction of the structure.

(D) Since the movement of the form support is made by means of wheels which can be freely rotated in the lower part of the form support, the man-hours for laying and removing the rail are not required as compared with the rail system. Also, it became possible to move in the width direction and make fine adjustments.

[Brief description of drawings]

FIG. 1 is a view showing a hollow structure of a form support pillar 5.

FIG. 2 is a side cross-sectional view of a box-shaped underground structure and formwork support, in which two upper formwork support columns on the left side of the formwork support column 5a are cut out.

FIG. 3 is a diagram in which the formwork supporter 14 has been moved to the cutting beam 15b.

FIG. 4 is a view in which the formwork support pillar located on the left side of the cutting beam 15b is erected on the right side and changed.

FIG. 5 is a diagram in which the form supporter 14 is moved until the form supporter post is located on the left side of the cutting beam 15b.

FIG. 6 is a front view of a moving device for the entire form supporter 14.

FIG. 7 is a side view of FIG.

FIG. 8 is a diagram showing an embodiment in which the upper and lower formwork supports 14a and 14b are completely separated by an oil jack frame 19 by further rationalizing the hollowing out of the formwork support columns using a hand jack. is there.

[Fig. 9] Beam 17b for moving the form support to the right
The oil jack 18a that interferes with the
It is the figure which showed the place where it exchanges.

FIG. 10 is a view showing that the oil jacks 18a are exchanged and refilled, the oil jacks 18b are contracted, and the cutting beams 17b are exchanged.

FIG. 11 is a plan view of the form support of a box-shaped structure.

12 is a vertical cross-sectional view of FIG.

[Explanation of symbols]

1 ... Daihiki, 2 ... joists, 3 ... plywood, 4 ...
Large underwriting hand jack, 5 ... Form supporter, 5a
... Upper formwork support pillars, 5b ... Lower formwork support pillars, 6 ... Large joints, 7 ... Brace support member, 8 ... Hand jack base, 9 ...・ Bolts and nuts, 10 ・ ・ ・ Hand jack handle, 11 ・
..Horizontal connection, 12 ... Hand jack base, 1
3 ... Scaffolding board, 14 ... Form support, 14a ...
Upper formwork support, 14b ... Lower formwork support, 15 ・
.... Crossbeams, 15a ... cut beams, 15b ... cut beams, 16
... Wheels, 16a ... Wheel frames, 17a ... cut beams, 17b ... cut beams, 17c ... cut beams, 18a ...
・ Oil jack, 18b ... Oil jack, 19
... Oil jack frame, 20 ... Upper floor (slab), 21 ... Vertical column for supporting road lining load

Claims (6)

[Claims] 1. In a formwork supporting structure, the upper formwork supporting work and the lower formwork supporting work can be separated from each other at a position slightly lower than a portion where the beam is located, and the upper formwork supporting work column can be hollowed out. A structure for supporting the formwork, which is provided with a means, and is normally formed by fastening and integrating a pair of hand jacks attached to the upper and lower formwork supports. 2. In a formwork supporting structure, a plurality of oil jacks are formed by forming a lower formwork supporting part lower than a portion where a beam is located, and comprising a plurality of oil jacks on the lower formwork supporting structure. A formwork support structure, in which a framework is arranged, and an upper formwork support work is installed above the oil jack framework. 3. The form supporting structure according to claim 1, wherein a plurality of wheel frames and wheels are provided below the lower form supporting column in the form supporting structure. . 4. The formwork support structure according to claim 1, wherein the formwork support structure comprises an assembled truss. 5. In a formwork support structure using a hand jack, several upper formwork support columns adjacent to a beam are hollowed out, and only the space formed by hollowing out the formwork support work. Formwork support construction constructed by sequentially moving the whole and crossing the beams, removing the horizontal ties and intersecting the vertical temporary columns and repeating the above-mentioned upper formwork support columns and horizontal ties. Construction method. 6. In a formwork support structure using an oil jack frame, the entire formwork support work is moved until the oil jack interferes with the cutting beam, so that the oil jack crosses the cutting beam. A construction method for constructing formwork support, which is characterized in that the jacks are refilled, the horizontal joints are removed, the vertical temporary columns are exchanged, and the refilling is repeated.