JP6206954B2 - Column laying method using concrete formwork for concrete foundation - Google Patents

Description

The present invention relates to a method of laying a pillar using a concrete foundation burying form , which is required when excavating a pillar foundation such as a utility pole, for example.

  When conducting electrification of railways, new utility poles will be installed at many locations. The electrification work of the railway has a long construction period, and the laying state of the electric pole continues for a long time from underground excavation for forming the electric pole foundation to placing concrete at the excavation site and building the electric pole.

  Therefore, in order to ensure the safety of continuation of the laid state of the power pole for a long time, a formwork that plays a role of earth retaining is installed around the excavation site when excavating underground for foundation formation.

  In conventional foundation construction, in order to prevent the collapse of the embankment during excavation work, earth retaining is performed with a wooden formwork made of synthetic lauan material or regular sliding material, for example, after about 500 mm excavation from the ground surface, about W (Horizontal) 1,400mm × L (vertical) 1,400mm × H (height) 400mm dimensions, excavation of the recess that becomes the brim for forming the foundation, then excavation of the foundation hole using the earth retaining spiral duct Then, after inserting the spiral duct, raw concrete was cast to complete the foundation for building electric poles.

  However, the longer the laying state of the electric pole from excavation to concrete placement, the more anxiety is in terms of durability with conventional wooden formwork, and after concrete placement, the wooden formwork is demolded It is necessary and time-consuming.

  Therefore, in the present invention, instead of the conventional wooden formwork, it is more durable than wood, and thus has excellent construction safety. We decided to adopt a concrete formwork that can be made.

In addition, although the concrete formwork for foundations has the subject that there is weight compared with a wooden formwork, the solution of the said subject was also able to be aimed at by this invention.

JP 2006-125145 A

Thus, the present invention was devised to solve the above-mentioned conventional problems, and is more durable than wood, and can be buried as it is without the need for mold removal after placing concrete, Since the formwork unit with the divided frame can be manufactured in the factory in advance and the formwork can be formed at the site of the pillar installation, it is easy to transport heavy concrete formwork, and it is safe and cost-effective. It is an object of the present invention to provide a method for laying a pillar using a concrete foundation filling form that can be made inexpensive.

A method of laying a pillar using a concrete foundation filling form according to the present invention is as follows.
A plurality of formwork units that are manufactured in advance and have a rectangular concrete substrate and concrete side plates bent in a substantially right angle direction from both ends of the concrete substrate and formed in a substantially U shape. To the laying site,
In the laying location that is a horizontal plane in the laying site, a pair of the mold unit is paired with each other and the U-shaped tip ends are connected to form a substantially square first frame,
On the top of the first frame, a second frame having the same structure as the first frame is stacked, and the concrete frame is formed into a rectangular tube shape by the first frame and the second frame. Form a buried formwork,
The excavation for placing the earth retaining spiral duct is carried out in the formwork for burying foundation, the earth retaining spiral duct is installed in the excavation hole for the earth retaining spiral duct, and then the inner frame spiral duct is installed. The excavation for entering is carried out further downward than the excavation position of the earth retaining spiral duct, smaller than the excavation diameter of the earth retaining spiral duct, and an inner frame is formed in the excavation hole for the inner frame spiral duct. Installed a spiral duct for
After placing the ready-mixed concrete, the pillars were well-planted, and the inner frame spiral duct, the earth retaining spiral duct and the concrete foundation filling mold were buried,
It is characterized by
Or
The stacking of the frames is a plurality of stages of two or more stages.
It is characterized by
Or
Stacking the frame body, the butt connection locations were shifted by approximately 90 degrees so that the connection portions of the frame bodies did not overlap,
It is characterized by
Or
The formation of the frame is
The connection bolt holes provided on the side surfaces of the U-shaped both ends of each of the united mold units were connected by fitting the U-shaped connection bolts,
It is characterized by
Or
The U-shaped connection bolt is fitted so that the tip protrudes outside the frame,
It is characterized by
Or
The frames are stacked in a rectangular shape with an H-shaped cross section for fixing the lower frame and the upper frame to the central border of the lower frame and the upper frame. A connection fitting is provided to prevent displacement between the frames.
It is characterized by
Or
On the concrete substrate side of both concrete side plates in the formwork unit, conveying jig connection holes are provided at a plurality of locations,
The formation of the frame was formed by fitting a U-shaped conveyance jig into the conveyance jig connection hole of the both concrete side plates and conveying the frame unit manually.
It is characterized by this.

If it is a method of laying a pillar using a concrete foundation laying mold according to the present invention, it is more durable than wood, and it can be buried as it is without the need for mold removal after placing concrete, In addition, a formwork unit with a divided frame body can be manufactured in the factory in advance, and the formwork can be formed at the site where the pillars are laid, which makes it easy to transport heavy concrete formwork, and is safe and cost-effective. It has an excellent effect that it can be made inexpensive.

It is composition explanatory drawing (1) explaining the structure of the concrete foundation filling formwork. It is composition explanatory drawing (2) explaining the structure of the concrete foundation filling formwork. It is composition explanatory drawing (3) explaining the structure of the concrete foundation filling formwork. It is a structure explanatory view (4) explaining the structure of the filling mold for concrete foundations. It is explanatory drawing (1) explaining the structure of the Example of this invention. It is explanatory drawing (2) explaining the structure of the Example of this invention. It is explanatory drawing (3) explaining the structure of the Example of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIG. 7, the present invention is applied to a laying place 16 such as a utility pole on the side of a railway that performs electrification work, for example.

  Specifically, when forming a foundation to be laid, such as a utility pole, for example, a substantially square-shaped collar portion is formed at that location, and the bottom surface is a horizontal plane, and a so-called foundation foundation is formed. The formwork is erected in a rectangular tube shape and applied.

  The present invention uses a buried type foundation mold 8 that does not require demolding after placing concrete, and as shown in FIG. 1, the mold is formed with a rectangular concrete substrate 1. The formwork unit 3 having a concrete side plate 2 and 2 bent in a substantially right angle direction from both ends of the concrete substrate 1 and formed in a substantially U-shape is a basic member.

  The mold unit 3 can be manufactured in large quantities at a factory in advance.

  As shown in FIG. 2, two mold units 3... Are paired, and the U-shaped end portions of the respective mold units 3 and 3 are abutted and connected to each other. One frame 4a is formed.

  As shown in FIGS. 1B and 2, connection bolt holes 5 are provided on the side surfaces of the U-shaped both ends of the mold unit 3. Therefore, the frame body 4 has a U-shaped connection bolt 6 fitted into the connection bolt holes 5, 5 of the pair of butted mold unit 3, 3, and the pair of mold unit 3, 3 It is formed by connecting.

  Next, on the upper part of the formed first frame body 4a, a second frame body 4b configured by connecting a pair of mold unit 3, 3 is stacked like the first frame body 4a.

  In addition, as shown in FIG. 3, the first frame body 4a and the second frame body 4b are located at the connecting bracket mounting position at the central boundary between the lower first frame body 4a and the upper second frame body 4b. A rectangular connection fitting 7 having an H-shaped cross section is attached to prevent the frames 4.

  That is, as can be understood from FIG. 4, the H-shaped rectangular connection fitting 7 has an H-shaped cross section, and a concave groove portion is formed on each of the upper side and the lower side.

  The concave groove portion on the lower side of the H-shaped rectangular metal fitting 7 is fitted into the connecting metal fitting mounting position at the upper center end in the longitudinal direction of the first frame 4a, and the second concave groove portion on the upper side of the H-shaped rectangular metal fitting 7 is inserted. The 2nd frame 4b is mounted in the 1st frame 4a so that the connection bracket attachment position of the longitudinal direction center lower end part of the frame 4b may fit. Thereby, the 1st frame 4a and the 2nd frame 4b are fixed, and the shift of frame 4 can be prevented.

  As described above, the concrete foundation filling form 8 according to the present invention is formed in a rectangular tube shape by stacking the first frame body 4a and the second frame body 4b, for example.

  And this concrete laying form 8 for concrete foundation plays the role of earth retaining from the concrete placement performed to form the foundation to the construction of pillars such as electric poles, and the concrete placement After the foundation work is completed, it will be buried as it is without demolding.

  The present invention can be formed not only from the first frame body 4a and the second frame body 4b but also from a plurality of frame bodies 4 ..., and is embedded in concrete foundations in two or more stages. The formwork 8 can also be formed.

  For example, it is conceivable that the lower two stages are used for the brim for forming the foundation, and the upper two stages are used for earth retaining of the embankment generated in large quantities.

  Next, a method for laying a column using the concrete foundation filling form 8 will be described.

  Formed in a substantially U shape, having a concrete substrate 1 having a rectangular shape, which is manufactured in advance at a factory, and concrete side plates 2 and 2 bent in a substantially right angle direction from both ends of the concrete substrate. A plurality of units 3... Are prepared, and the prepared plurality of formwork units 3.

  In the laying site, a so-called collar recess is excavated and an excavation recess having a bottom surface in a horizontal plane is formed in an area serving as a foundation formation location.

  Then, a pair of the above-mentioned formwork units 3 are prepared at the excavation location, and the U-shaped tip portions thereof are butted and connected to form a substantially square first frame body 4a.

  On the top of the first frame 4a, a second frame 4b configured in the same manner as the first frame 4a is stacked, and a rectangular tube shape is formed by the first frame 4a and the second frame 4b. It is referred to as a buried foundation 8 for eggplant concrete foundation.

  Here, in the present invention, the concrete foundation filling form 8 made of concrete is much more durable than the conventional wooden formwork, and it is buried without being removed from the formwork after the concrete is placed. This is because it can be killed.

  However, concrete foundation formwork is heavier than wooden formwork.

  Therefore, in the factory, the frame body 4 itself is not manufactured and transported, but the mold body unit 3 having a shape obtained by dividing the frame body 4 is manufactured and transported in a non-bulky state. The frame unit 4 is assembled at the laying site to form the frame 4.

  Therefore, the transportation from the factory to the laying site by a truck or the like, and the transportation from the truck or the like to the laying place became extremely easy.

  That is, as can be understood from FIGS. 1 and 2, transport jig connection holes 9 are provided at a plurality of locations on the concrete substrate 1 side of the both concrete side plates 2 and 2 in the mold unit 3. When a U-shaped conveying jig is fitted into the conveying jig connection hole 9 of the both concrete side plates 2, the conveying jig can be gripped from both sides to enable manual conveyance.

  In the embodiment of the present invention, for example, since the weight of one mold unit 3 is about 58 kg, the weight can be easily transported by two people. Then, the frame unit 3 is assembled at the laying site to form the frame body 4.

  In the embodiment, the transport jig connecting hole 9 has a decoy as shown in FIG. 1 and the like, three on the concrete side plate 2, on the concrete substrate 1 side, and slightly on the concrete substrate side from the longitudinal center of the concrete side plate. There are a total of four.

  By providing a plurality of transport jig connection holes 9 in this way, the mounting position of the U-shaped transport jig can be selected according to the transport situation, thereby facilitating transport of the mold unit 3. .

  Further, as can be understood from FIG. 1 to FIG. 3 and the like, the mold unit 3 can be obtained by providing substantially rectangular concave portions 10 at a plurality of locations inside the concrete substrate 1 and the concrete side plates 2 and 2 of the mold unit 3. The weight is reduced.

  Further, as shown in FIGS. 1B and 2, a connecting bolt hole 5 is provided on the side surfaces of both ends of the U-shape of the mold unit 3. The pair of mold units 3 and 3 are connected to each other by fitting U-shaped connection bolts 6 into the connection bolt holes 5 and 5 of the abutted mold unit 3 and 3.

  Here, it is preferable that the U-shaped connection bolt 6 is fitted so that the tip portion protrudes to the outside of the frame body 4. This is because, as can be understood from FIG. 2, the front end of the U-shaped connection bolt 6 protruding from the frame 4 faces outward so that it does not become an obstacle during excavation.

  Moreover, the cross section which fixes the 1st frame 4a and the 2nd frame 4b to the connection bracket attachment position of the center boundary part of the 1st frame 4a located below and the 2nd frame 4b located above is the cross section. An H-shaped rectangular connection fitting 7 is attached to prevent the frames 4 from being displaced.

  That is, as can be understood from FIG. 4, the H-shaped rectangular connection fitting 7 has an H-shaped cross section, and a concave groove portion is formed on each of the upper side and the lower side.

  The concave groove portion on the lower side of the H-shaped rectangular metal fitting 7 is fitted into the connecting metal fitting mounting position at the upper end of the center in the longitudinal direction of the first frame body 4a, and the second concave groove portion on the upper side of the H-shaped rectangular metal fitting 7 is inserted. The 2nd frame 4b is mounted in the 1st frame 4a so that the connection bracket attachment position of the longitudinal direction center lower end part of the frame 4b may fit. Thereby, the 1st frame 4a and the 2nd frame 4b are fixed, and the shift | offset | difference of frames 4 can be prevented.

  It should be noted that not only the first frame body 4a and the second frame body 4b but also a plurality of frame bodies 4... Can be provided. It is possible to have a plurality of stages as described above.

  As described above, for example, it is conceivable that the lower two tiers are used for the brim of the foundation, and the upper two tiers are used for retaining a large amount of embankment, for a total of four tiers.

  Next, in order to put a spiral duct for earth retaining in the concrete foundation filling form 8 formed above, excavation within a predetermined depth from the collar part, for example, a depth of 1.5 m or less from the bottom part of the collar part, for example. I do.

  Then, the earth retaining spiral duct 11 is installed in the excavation hole for the earth retaining spiral duct, and the excavation for inserting the inner frame spiral duct is further performed downward from the excavation position of the earth retaining spiral duct. Excavation with a diameter smaller than the excavation diameter of the earth retaining spiral duct is performed. Thereafter, the inner frame spiral duct 12 is installed in the excavation hole for the inner frame spiral duct.

Thereafter, even when the concrete foundation laying mold 8 is laid for a long period until the concrete is placed for foundation formation, according to the concrete foundation burying mold 8 of the present invention, Because it is extremely durable compared to the conventional wooden formwork, even in places where the construction environment is severe, such as where there is a lot of embankment or where it is narrow, it plays a role of retaining soil in a long-term laying state be able to.

Next, after placing ready-mixed concrete, the pillars 14 are erected. The inner frame spiral duct 12, the earth retaining spiral duct 11, and the concrete foundation filling form 8 are filled.

  That is, as shown in FIG. 6, after placing concrete 13 in the inner-frame spiral duct 12, a pole 14 such as a utility pole is erected. Thereafter, the concrete 13 is cast and integrated without removing the earth retaining spiral duct 11 and the concrete foundation burying mold 8.

  Then, the outside of the concrete foundation burying mold 8 that has played the role of retaining the soil may be prepared as usual so that the entire mold is filled.

Therefore, in the present invention, since it can be completely buried, it is not necessary to remove the mold as in the case of a wooden formwork, and it is possible to save labor and thereby contribute to cost reduction.

DESCRIPTION OF SYMBOLS 1 Concrete board | substrate 2 Concrete side plate 3 Formwork unit 4 Frame 4a 1st frame 4b 2nd frame 5 Connection bolt hole 6 U-shaped connection bolt 7 H-shaped rectangular connection metal fitting 8 Filling formwork for concrete foundation 9 Conveying jig connection hole 10 Concave portion 11 Spiral duct for earth retaining 12 Spiral duct for inner frame 13 Concrete 14 Pillar 15 Line 16 Piling place, etc.

Claims (7)

A plurality of formwork units that are manufactured in advance and have a rectangular concrete substrate and concrete side plates bent in a substantially right angle direction from both ends of the concrete substrate and formed in a substantially U shape. To the laying site,
  In the laying location that is a horizontal plane in the laying site, a pair of the mold unit is paired with each other and the U-shaped tip ends are connected to form a substantially square first frame,
On the top of the first frame, a second frame having the same structure as the first frame is stacked, and the concrete frame is formed into a rectangular tube shape by the first frame and the second frame. Form a buried formwork,
The excavation for placing the earth retaining spiral duct is carried out in the formwork for burying foundation, the earth retaining spiral duct is installed in the excavation hole for the earth retaining spiral duct, and then the inner frame spiral duct is installed. The excavation for entering is carried out further downward than the excavation position of the earth retaining spiral duct, smaller than the excavation diameter of the earth retaining spiral duct, and an inner frame is formed in the excavation hole for the inner frame spiral duct. Installed a spiral duct for
After placing the ready-mixed concrete, the pillars were well-planted, and the inner frame spiral duct, the earth retaining spiral duct and the concrete foundation filling mold were buried,
A method of laying pillars using a concrete formwork for concrete foundations.
The stacking of the frames is a plurality of stages of two or more stages.
A method for laying a pillar using the concrete foundation filling form according to claim 1.
Stacking the frame body, the butt connection locations were shifted by approximately 90 degrees so that the connection portions of the frame bodies did not overlap,
A method for laying a column using the concrete foundation filling form according to claim 1 or 2, characterized in that
The formation of the frame is
The connection bolt holes provided on the side surfaces of the U-shaped both ends of each of the united mold units were connected by fitting the U-shaped connection bolts,
A method for laying a pillar using the concrete foundation filling form according to claim 1, claim 2, or claim 3.
The U-shaped connection bolt is fitted so that the tip protrudes outside the frame,
A method for laying a pillar using the concrete foundation filling form according to claim 1, claim 2, claim 3, or claim 4.
The frames are stacked in a rectangular shape with an H-shaped cross section for fixing the lower frame and the upper frame to the central border of the lower frame and the upper frame. A connection fitting is provided to prevent displacement between the frames.
A method for laying a column using the concrete foundation filling form according to claim 1, claim 2, claim 3, claim 4, or claim 5.
On the concrete substrate side of both concrete side plates in the formwork unit, conveying jig connection holes are provided at a plurality of locations,
The formation of the frame was formed by fitting a U-shaped conveyance jig into the conveyance jig connection hole of the both concrete side plates and conveying the frame unit manually.
A method of laying a pillar using the concrete foundation filling form according to claim 1, claim 2, claim 3, claim 4, claim 5, or claim 6.

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