JP6065204B2 - Unit base for frame construction - Google Patents

Description

  The present invention relates to a unit frame for frame construction used when constructing a reinforced concrete frame.

As is well known, as a construction method for constructing a large underground structure such as a foundation of a large-scale bridge or an underground tank, for example, a pneumatic caisson method as shown in Patent Document 1 or a patent document 2 is shown. Various caisson methods such as the press-fitting caisson method are known.
In these caisson methods, a robust cylindrical enclosure as a submerged part is formed on the surface, a blade is provided at the lower end, and the lower ground of the blade is excavated, and the entire enclosure is sequentially submerged in the ground. At the same time, it is fundamental to add a new chassis to the top of the chassis.

  When this type of caisson method is used, the cylindrical casing as a submerged container needs to have a sufficiently strong structure, so it may be constructed as a robust reinforced concrete casing with a wall thickness of several meters. However, when constructing a reinforced concrete frame with such a large cross section, the required amount of reinforcing bars is inevitably enormous, and it is necessary to densely arrange large diameter reinforcing bars. It becomes a troublesome work that requires time and effort.

For this reason, when constructing a reinforced concrete frame with such a large cross section, a unit base for supporting the rebar or an element equivalent to it has been placed in the frame and it has been used for efficient bar arrangement work. The construction method is also adopted in which the unit base is left as it is and is finally embedded in the housing.
For example, Patent Document 1 describes that a reinforcing bar rack (such as an assembled steel bar) is embedded in the lower part of a wall body to be deposited by a pneumatic caisson method, and Patent Document 3 describes a method using a caisson method. However, it is described that steel embedded scaffolds for performing reinforcement work when installing the side walls of underground tanks are installed in the sidewalls, and these reinforcing bar racks and embedded scaffolds correspond to the above unit mounts Is.

Japanese Patent Laid-Open No. 10-54038 JP 2003-105773 A JP 2007-63895 A

By the way, it is not limited to the case of the caisson method, but the workability can be improved to some extent by using the unit mount as described above or the elements corresponding to it in the construction of the large-section reinforced concrete frame. The various unit mounts used at the present time are somewhat inefficient in response to each work and do not necessarily have a sufficient workability improvement effect.
In particular, it will not be a problem if the work is completed in several lots, but there are many cases where the same section is repeated continuously for 10 or more lots. In such a case, the work efficiency is further improved. It is said that it is necessary to plan.

  In view of the above circumstances, an object of the present invention is to provide an effective and appropriate unit mount that can sufficiently improve the work efficiency when constructing a reinforced concrete structure with a large cross section.

The invention according to claim 1 is a unit frame that is installed in a vertically stacked manner in the construction of a reinforced concrete frame, wherein the unit frame is composed of a vertical member and a horizontal member made of steel. The unit frame is provided with a reinforcing bar ruler member for positioning and supporting the reinforcing bars arranged in the casing, and the unit frame is moved up and down on the vertical member. provided joint with the adjust function for coupling to position in direction, and said the distal end portion of the crosspiece is provided mold guide member, the formwork guide member forms the skeleton It contacts the formwork for positioning, and the said formwork is positioned and supported .

The invention described in claim 2 is the unit frame for housing construction according to claim 1, wherein the unit frame can also be used as a support frame for positioning and supporting a cooling pipe embedded in the frame. It is characterized by being.
The invention according to claim 3 is a unit frame that is installed in a vertically stacked manner in the construction of a reinforced concrete frame, wherein the unit frame is made of a vertical member and a horizontal member made of steel. The unit frame is provided with a reinforcing bar ruler member for positioning and supporting the reinforcing bars arranged in the casing, and the unit frame is moved up and down on the vertical member. A joint part having an adjustment function for positioning and connecting in the direction is provided, and a form guide for positioning and supporting the form for forming the housing at the tip of the cross member A member is provided, and the unit base can also be used as a support base for positioning and supporting a cooling pipe embedded in the housing. Is shall.

The unit frame of the present invention is the one in which the same shape and the same size are stacked in the vertical direction in the frame to be constructed and stacked in multiple stages, and the reinforcing bar is positioned using the reinforcing bar ruler member By doing so, it is possible to efficiently carry out the bar arrangement work.
This unit base is a frame made of vertical members and cross members made of steel, and the vertical member is provided with a joint portion having an adjusting function for connecting the unit bases in the vertical direction. Therefore, the unit mount can be easily and accurately installed in the housing. Moreover, since the formwork guide member for positioning and supporting a formwork is provided in the front-end | tip part of a cross member, formwork can also be performed efficiently.
Therefore, by using the unit base of the present invention, it is possible to efficiently construct a large cross-section frame having a continuous cross-sectional shape constructed by, for example, the caisson method by simple repetitive work, It is possible to sufficiently improve the efficiency and accuracy of the assembly work of the formwork.

The embodiment of the present invention is shown, and is a diagram showing a situation in which the unit mount of the present embodiment is installed in a housing to be constructed. It is a figure which shows the installation process of a unit stand, (a) is the state at the time of completion | finish of construction of a previous lot, (b) is the state which has installed some unit mounts in this lot, (c) is The state in which the rest of the unit base is installed, (d) is a diagram showing the state in which the installation process of the unit base in this lot has been completed. The same shows the process after installing the unit mount, (a) is the state where the reinforcing bars are arranged, (b) is the state where the formwork is assembled, (c) is the state when the construction of this lot is completed. FIG.

Hereinafter, with reference to FIGS. 1-3, embodiment of the unit mount for frame construction of this invention is described.
FIG. 1 is a diagram showing a situation in which a unit base 2 of the present embodiment is installed when constructing a reinforced concrete case 1 having a large cross section. FIGS. 2 to 3 show the case 1 using the unit base 2. It is a figure which shows the process for 1 lot in the case of constructing.
FIG. 2 (a) shows the state at the end of construction of the previous lot, and FIG. 2 (b) shows the state where construction of the current lot is started, and FIG. 1 is shown in FIG. 2 (b). The situation corresponding to the process shown is shown.

The unit gantry 2 according to the present embodiment has a multistage structure in which the same shape and the same size are vertically arranged in the case 1 for the purpose of improving the efficiency of the bar arrangement work and the formwork when the reinforced concrete case 1 is constructed. It is piled up and installed, and is finally buried in the housing 1 as it is.
The unit base 2 of the present embodiment is configured by assembling a vertical member 3 and a horizontal member 4 made of various steel materials into a frame shape, and a reinforcing bar 10 arranged in the housing 1 is positioned on the unit base 2. A reinforcing bar ruler member 5 is provided for supporting the vertical support member 3, and a joint member 6 having an adjusting function for positioning and connecting the unit mounts 2 in the vertical direction is provided on the vertical member 3. A formwork guide member 7 for positioning and supporting the formwork 11 for forming the housing 1 is provided at the front end of the cross member 4.

  Specifically, in the unit mount 2 of the present embodiment, various steel materials such as an equilateral mountain-shaped steel (angle material), a grooved steel, a steel pipe or the like as shown in the figure are connected to each other. Thus, it is assembled into a three-dimensional frame as a whole.

The length of the vertical member 3 corresponds to the height of one lot of the casing 1 to be constructed, and the upper and lower ends of the vertical member 3 are connected to the upper and lower sides of the unit base 2 respectively. A joint portion 6 for connecting other unit mounts 2 having the same shape and size is provided.
The joint portion 6 is configured so that the vertical members 3 of the unit base 2 connected in the vertical direction can be easily and reliably connected to each other by bolt fastening, and a long hole or the like for accurately positioning in the vertical direction. It is supposed to have an adjustment function.

The cross members 4 are assembled in multiple stages (for example, three stages as shown in FIG. 2D in the illustrated example) at substantially equal intervals in the vertical direction with respect to the vertical members 3 described above.
The lengths of the cross members 4 correspond to the wall thickness of the frame 1 to be constructed, and the frame 11 for forming the frame 1 is positioned and supported at both ends of the cross members 4. A formwork guide member 7 is provided.
In the illustrated example, the mold guide member 7 has a spherical head with a smooth tip. As will be described later, in the process of assembling the mold 11, the mold 11 is moved with respect to the tip of the mold guide member 7. It is assumed that the positioning of the mold 11 can be performed with high accuracy by simply contacting and supporting it.
The formwork guide member 7 is preferably made of concrete, mortar or the like.

  And the reinforcing bar ruler member 5 for positioning the reinforcing bar 10 arrange | positioned in the housing 1 is attached to the position of the both ends of the cross member 4 so that the length direction of the housing 1 may be followed. The position where the reinforcing bar ruler member 5 is attached to the cross member 4 is determined in advance with high accuracy corresponding to the reinforcing bar placement position of the reinforcing bar 10 to be arranged in the subsequent stage, and the reinforcing bar ruler member 5 is pre-marked with a reinforcing bar interval. Thus, as will be described later, the reinforcing bar 10 can be properly positioned properly by merely bringing the reinforcing bar 10 to be arranged into contact with the reinforcing bar ruler member 5 in accordance with the marking position.

  In addition, the unit base 2 in the illustrated example is also provided with a brace member 8 between the vertical member 3 and the horizontal member 4. The brace member 8 is for ensuring the rigidity of the entire unit base 2, but this is not necessarily provided. If the desired rigidity can be ensured only with the vertical members 3 and the horizontal members 4, the brace member 8 is not provided. The member 8 may be omitted.

In order to construct the case 1 using the unit frame 2 described above, the construction of the previous lot shown in FIG. Install the unit base 2 of this lot.
It should be noted that the unit base 2 used in this lot is preferably assembled in advance in the desired shape and size at the site or factory, but in the illustrated example, one unit base 2 is shown in FIGS. 2 (b) and 2 (c). As shown in FIG. 4, for convenience, the lower two steps and the upper one step are separately installed while being assembled, and the lowermost and uppermost brace members 8 have only the upper end portion with respect to the cross member 4. They are connected in advance and their lower ends are set as free ends.

As shown in FIG. 2 (a), when the construction of the previous lot is completed, the upper end portion of the vertical member 3 and the upper end portion of the reinforcing bar 10 in the unit base 2 constructed in the previous lot project on the upper portion of the housing 1 that has been constructed. As shown in FIG. 2 (b), the unit rack 2 of this lot is suspended from above, and as shown in FIG. 2 (c), the upper part of the vertical member 3 of the unit rack 2 of the previous lot is suspended. On the other hand, the lower ends of the vertical members 3 of the unit base 2 of this lot are brought into contact with each other and connected by bolt fastening.
At that time, joints 6 are provided at the distal ends of both longitudinal members 3 to be connected, and these joints 6 have an up / down adjustment function. After positioning the lot unit base 2 with high accuracy, it is installed with high precision using its adjustment function.
In addition, when the brace member 8 is provided like the example of illustration, the lower end part of the brace member 8 is connected with the longitudinal member 3 which has been constructed.

Next, as shown in FIG. 2 (c), the uppermost cross member 4 is connected to the vertical member 3, and when the brace member 8 is provided, the lower end thereof is connected to the vertical member 3. To do.
This completes the installation of one unit base 2 in this lot, as shown in FIG. 2 (d), so that other unit bases 2 are similarly installed over the entire length of the housing 1 and they are connected to each other. I will do it.

After the unit base 2 is installed over the entire length of the housing 1 as described above, or in parallel with the operation of sequentially installing the unit base 2, the bar arrangement work and the formwork work in this lot are performed.
That is, as shown in FIG. 3A, the reinforcing bars 10 of the current lot are appropriately joined to the upper ends of the reinforcing bars 10 protruding upward by the construction of the previous lot.
At that time, by performing the bar arrangement according to the markings provided in advance on the reinforcing bar ruler member 5, the bar arrangement work can be performed very efficiently and with high accuracy.

Next, the mold 11 is assembled as shown in FIG.
At that time, a reusable system formwork is used as the formwork 11 and the inner surface of the formwork 11 may be supported by being brought into contact with the front end of the formwork guide member 7 provided at the front end of the cross member 4. Thus, the positioning of the mold 11 can be easily performed with high accuracy.

After that, if concrete is cast and filled in the mold 11 and the mold 11 is removed after a predetermined curing period, the construction of the lot is completed as shown in FIG.
Since the state shown in FIG. 3 (c) is the same as the completion time of the previous lot shown in FIG. 2 (a), the entire process can be performed by simply repeating the above steps up to the final lot. .

  As described above, the unit base 2 of the present invention is configured so that the same shape and the same size can be connected in the vertical direction, and this includes a reinforcing bar ruler member for positioning and supporting the reinforcing bar 10. 5, and the vertical member 3 of the unit base 2 is provided with a joint portion 6 having an adjusting function, and the transverse member 4 has a formwork guide member for positioning and supporting the formwork 11. 7 is provided, it is possible to efficiently construct a large cross-section housing 1 having a continuous cross-sectional shape by a simple repetitive operation by using this unit mount 2, and in particular, the work of bar arrangement and formwork assembly Since it is possible to improve efficiency and accuracy sufficiently, it contributes to shortening the construction period and cost when constructing a reinforced concrete frame with a large cross section, which is constructed by the caisson method, for example. It is get those.

  Although one embodiment of the present invention has been described above, the above embodiment is merely a preferable example, and the unit mount of the present invention is not limited to the above embodiment, and only the frame constructed by the caisson method is used. In addition to being applicable to all cases when constructing reinforced concrete structures with large cross sections, the specifications and specifications of the entire unit mount, the specific shape and dimensions of each part, etc. Naturally, an optimum design may be made according to the scale, form, design and construction conditions.

  In addition, when constructing a reinforced concrete structure with a large cross section, heat generation after the concrete is placed may cause high temperatures and cracks may occur. However, the unit mount of the present embodiment can also be used as a support mount for positioning and supporting such a cooling pipe, thereby providing a cooling pipe. The labor of construction can be reduced.

DESCRIPTION OF SYMBOLS 1 Housing 2 Unit mount 3 Vertical member 4 Cross member 5 Rebar ruler member 6 Joint part 7 Formwork guide member 8 Brace member 10 Reinforcement 11 Formwork

Claims (3)

When constructing a reinforced concrete frame, it is a unit stand that is stacked and installed in the vertical direction in the frame,
The unit gantry is constructed by assembling vertical and horizontal members made of steel into a frame shape,
The unit base is provided with a reinforcing bar ruler member for positioning and supporting the reinforcing bars arranged in the housing,
The vertical member is provided with a joint portion having an adjusting function for positioning and connecting the unit mounts in the vertical direction, and
A mold guide member is provided at the tip of the cross member ,
The formwork guide member is in contact with a formwork for forming the case, and positions and supports the formwork . It is a unit stand for frame construction according to claim 1,
The unit gantry for housing construction is characterized in that the unit gantry can also be used as a support gantry for positioning and supporting a cooling pipe embedded in the housing.   When constructing a reinforced concrete frame, it is a unit stand that is stacked and installed in the vertical direction in the frame,
  The unit gantry is constructed by assembling vertical and horizontal members made of steel into a frame shape,
  The unit base is provided with a reinforcing bar ruler member for positioning and supporting the reinforcing bars arranged in the housing,
  The vertical member is provided with a joint portion having an adjusting function for positioning and connecting the unit mounts in the vertical direction, and
  A formwork guide member for positioning and supporting a formwork for forming the housing is provided at the tip of the cross member,
  The unit gantry for housing construction is characterized in that the unit gantry can also be used as a support gantry for positioning and supporting a cooling pipe embedded in the housing.

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