JP2005232720A - Columnar foundation constructing method, foundation constructing member and foundation structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a columnar foundation constructing technology for completing work for installing a columnar material in a short time. <P>SOLUTION: This foundation constructing member 1 comprises a rigid cylindrical body 2, a bag body 3 fixed to the cylindrical body 2 in a state of being applied to the outer face of the cylindrical body 2, and a base member 4 on which an anchor bolt 23 is mounted. The foundation constructing member is inserted into a excavated hole 20 previously formed in the ground, and then mortar 21 is filled in the bag body 3 to inflate the bag body 3 in the excavated hole 20. After the foundation constructing member 1 is fixed into the excavated hole 20, the columnar material 5 is mounted to the base member 4 with the anchor bolt 23. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for constructing a foundation of a columnar object such as a sign or an illumination lamp.

  Conventionally, when a columnar object such as a sign or an illuminating lamp is erected and fixed on the ground, as a method of constructing the foundation of this columnar object, for example, a concrete foundation is constructed by placing concrete at the construction site. And a method of building a foundation by bringing concrete blocks prepared in advance in a factory or the like to a construction site (for example, see Patent Documents 1 and 2).

JP-A-9-78607 JP-A-9-78608

  However, in the method of placing concrete at the construction site, columnar objects cannot be installed on the concrete foundation until the placed concrete has hardened, so it takes several days to complete the construction. As a result, the construction cost increases accordingly. On the other hand, in the construction methods described in Patent Documents 1 and 2, a step of hardening the concrete at the construction site is not required because the ready-made concrete block is used. However, concrete blocks transported from factories, etc. are heavy, so they are not easy to handle, are not very long (a length of several meters at most), and have a simple structure. The construction work becomes large, such as the need for a machine and the need to secure a large work space.

  The objective of this invention is providing the foundation construction technique of the columnar thing which can complete the installation operation | work of a columnar thing in a short time.

Means for Solving the Problems and Effects of the Invention

  A basic construction method for a columnar object according to a first invention has a rigid cylindrical body and a bag body fixed to the cylindrical body in a state of covering the outer surface of the cylindrical body, and is erected on the ground. Inserting a base construction member for constructing the foundation of the columnar object into a hole formed in the ground in advance, and injecting a pressurized fluid into the bag body to expand the bag body within the hole And a process.

  In this foundation construction method, first, a foundation construction member having a rigid cylindrical body and a bag body fixed to the cylindrical body is inserted into a hole formed in the ground. Then, by injecting a pressurized fluid into the bag body, the bag body is expanded in the hole, and the foundation building member can be easily fixed in the hole. Furthermore, a columnar object such as a sign or an illumination lamp can be immediately attached to the foundation constructed by fixing the foundation construction member in the hole in this way. Therefore, the installation work of the columnar object can be completed in a short time, and the construction cost can be reduced.

  The foundation construction method for a columnar object according to a second invention is the method according to the first invention, wherein the foundation construction member is provided at an end of the cylindrical body and a plurality of anchor bolts for fixing the columnar object. It has a base member to which is attached. Accordingly, the columnar object can be fixed to the base member of the foundation building member fixed in the hole via the plurality of anchor bolts. Further, at that time, it becomes easy to adjust the verticality (tilt with respect to the ground) of the columnar object with the anchor bolt.

  According to a third aspect of the present invention, in the first or second invention, the bag body includes a plurality of warps and wefts that are continuously woven in a spiral shape with respect to these warps. It is a seamless tubular woven fabric, and is characterized by being a different-diameter tubular woven fabric in which the diameters at both ends are smaller than the diameter in the middle in the longitudinal direction.

  In this way, since the bag body is a seamless tubular woven fabric, the pressure resistance of the bag body is high, and even if pressurized fluid is injected into the bag body with a high injection pressure to reliably support the columnar object, The body is difficult to break. Moreover, since the bag body is a different-diameter cylindrical woven fabric having small diameters at both ends, play between the both ends and the cylindrical body is reduced, and the bag body is securely attached to the cylindrical body at both ends. Can do. Furthermore, when the pressurized fluid is injected into the bag body, the entire bag body swells substantially uniformly, so that no excessive pressure acts locally on the bag body.

  The foundation construction member for the columnar object of the fourth invention is a member for foundation construction for constructing the foundation of the columnar object standing on the ground, and is provided with a rigid cylindrical body and an outer surface of the cylindrical body. A bag body fixed to the cylindrical body in a covered state; and a base member provided at an end portion of the cylindrical body and to which a plurality of anchor bolts for fixing the columnar body are attached. It is what.

  Therefore, by inserting the foundation building member into the hole formed in the ground and then injecting a pressurized fluid into the bag body, the bag body is expanded in the hole, and the foundation building member is inserted into the hole. It is possible to construct the foundation by fixing it easily and securely. Also, in this state, columnar objects such as signs and illuminating lights can be immediately fixed to the base member via a plurality of anchor bolts, so that the installation work of the columnar objects can be completed in a short time, and the construction cost can be reduced. It becomes possible to reduce. Furthermore, it becomes easy to adjust the verticality (tilt with respect to the ground) of the columnar object with an anchor bolt.

  According to a fifth aspect of the present invention, in the fourth aspect of the invention, the base member includes a cylindrical base body attached to an end of the cylindrical body, and the base body to the base body. A plurality of plate-like members extending radially outward in the radial direction and parallel to the length direction of the base main body, and provided at the ends of the plurality of plate-like members opposite to the base main body, And a plurality of cylindrical members parallel to the length direction of the base body.

  In this base member, a plurality of anchor bolts are respectively attached to the plurality of cylindrical members, and the loads acting on the plurality of cylindrical members from the columnar object via the anchor bolts are a plurality of plate-like shapes extending radially from the base body. Since it is dispersed in the member, the columnar object is stably supported by the base member.

  According to a sixth aspect of the present invention, in the fifth aspect of the invention, the base body is configured such that the base body is rotatably attached to an end of the cylindrical body, and the base member is the base body. It has a fixing means which fixes non-rotatably with respect to the said cylindrical body. When pressurized fluid is injected into the bag body, the bag body may expand while the foundation construction member rotates depending on how the bag bodies overlap in the hole. However, since the base body of the base member is rotatably attached to the cylindrical body, the angle of the base member relative to the cylindrical body can be adjusted after the bag body is inflated. Then, after the base member is fixed to the cylindrical body by the fixing means so as not to rotate, the columnar object is attached to the base member.

  The basic structure of the columnar object of the seventh invention is a rigid cylindrical body, a bag body fixed to the cylindrical body in a state of covering the outer surface of the cylindrical body, and an end portion of the cylindrical body. And a base member to which a plurality of anchor bolts for fixing the columnar object are attached, and a base construction member inserted into a hole formed in the ground, and an additive injected into the bag body And a pressurized fluid.

  Therefore, since the pressurized fluid is injected into the bag body of the foundation building member inserted into the hole and the bag body expands, the foundation building member is fixed in the hole and the foundation is quickly built. You can quickly fix the pillars to this foundation. In addition, since a columnar object such as a sign or an illuminating lamp can be installed on the base member via a plurality of anchor bolts, it is easy to adjust the verticality (tilt with respect to the ground) of the columnar object with the anchor bolt. .

Embodiments of the present invention will be described. In the present embodiment, the present invention is applied when a columnar object such as a sign or an illumination lamp is installed on the ground.
First, the member for foundation construction for constructing the foundation of the columnar thing erected is demonstrated with reference to FIGS. 1-3. As shown in FIG. 1 and FIG. 2, the foundation building member 1 includes a cylindrical body 2 made of a rigid steel pipe and a bag body fixed to the cylindrical body 2 in a state of covering the outer surface of the cylindrical body 2. 3 and a base member 4 to which a plurality of anchor bolts 23 (see FIGS. 4 (b) to 4 (d)) for fixing the columnar object 5 are attached. .

  As the cylindrical body 2, a relatively long and cylindrical steel pipe is used. For example, a steel pipe having a diameter of 165 mm and a length of 1450 mm can be used. Two notches 2a are formed at the tip of the cylindrical body 2 (the right end in FIG. 1). In addition, two inlets for injecting pressurized mortar (pressurized fluid) into the bag 3 described below into the base end side portion (left end side portion in FIG. 1) of the cylindrical body 2. 2b is formed in the position which mutually opposes.

  As shown in FIG. 3, the bag body 3 is formed of a different-diameter cylindrical woven fabric having two small-diameter portions 3a formed at both ends and a large-diameter portion 3b formed between the two small-diameter portions 3a. Has been. This different-diameter tubular woven fabric is a seamless tubular woven fabric composed of a plurality of warps and wefts that are continuously woven in a spiral shape with respect to these warps.

As an example of this embodiment, for example, warp yarns of 1100/2 dtex × 768 polyester fibers and weft yarns of polyester fibers of 1100/6 dtex × 7 yarns / cm are used, and the diameter D ₁ of the small diameter portion 3a = 200 mm. When the length L ₁ of the small diameter portion 3a is 400 mm, the diameter D _{2 of} the large diameter portion 3b is 300 mm, and the length L ₂ of the large diameter portion 3b is 1100 mm, the design withstand pressure of the bag 3 is 1.5 MPa. It was.

  As shown in FIG. 1, a cylindrical body 2 is inserted into the bag body 3, and the bag body 3 is a cylinder by two band-shaped fixtures 6 attached to two small diameter portions 3 a at both ends. It is fixed in a state where it covers the outer surface of the body 2. Moreover, two ring-shaped metal fittings 7 for preventing the fixture 6 from being detached from the cylindrical body 2 are attached to both ends of the cylindrical body 2.

  Thus, since the bag 3 is a seamless tubular woven fabric, the pressure resistance is high, and even if the mortar 21 is injected into the bag 3 with a high injection pressure as described later, the bag 3 is broken. Hateful. Moreover, since the two small diameter parts 3a are formed in the both ends of the bag body 3, the play between these two small diameter parts 3a and the cylindrical body 2 becomes small, and the small diameter part 3a is made into a band-shaped fixture. By tightening with 6, the bag body 3 can be securely attached to the cylindrical body 2. Furthermore, when the mortar 21 is injected into the bag body 3, the bag body 3 swells substantially uniformly, and an excessively large pressure does not act on the bag body 3 locally.

  Inside the cylindrical body 2, an injection pipe 8 for injecting the mortar 21 into the bag body 3 is provided. The injection pipe 8 has a T-shape having a main pipe 8a and a branch pipe 8b branched from the main pipe 8a in the radial direction of the cylindrical body 2, and both ends of the branch pipe 8b are respectively formed in the cylindrical body 2. It communicates with the bag body 3 through the two inlets 2b formed in.

  As shown in FIGS. 1 and 2, the base member 4 includes a cylindrical base body 10 rotatably attached to an end portion of the cylindrical body 2, and a radially outer side of the base body 10 from the base body 10. The four plate-like members 11 extending radially and parallel to the length direction of the base body 10 are provided at the ends of the four plate-like members 11 opposite to the base body 10 (outside in the radial direction). And a plurality of cylindrical members 12 parallel to the length direction of the cylindrical base body 10.

  The base body 10 has a cylindrical shape with a slightly larger diameter than the cylindrical body 2. And the base end part of the cylindrical body 2 is inserted in this base main body 10, and the base main body 10 is attached with respect to the cylindrical body 2 so that rotation is possible. At the positions of both ends of the cylindrical base main body 10, annular stoppers 16 for preventing the removal are fixed to the cylindrical body 2 by welding, respectively, and the circumferential portion of the side surface of the base main body 10 is divided into four equal positions. Two push bolts 15 (fixing means) are attached to each.

  As shown in FIG. 2, four plate-like members 11 are respectively attached to the side portions of the base body 10 in the circumferential direction by welding, and these four plate-like members 11 are attached to the base. The main body 10 extends radially outward. A pair of cylindrical members 12 are fixed by welding at the radial ends of the base body 10 of each plate-like member 11 at positions on the left and right ends in FIG. And when installing the columnar object 5 in the ground, the anchor bolt 23 (refer FIG.4 (b)-(d)) is penetrated by one pair of cylindrical members 12, and the columnar object 5 is 4 pairs of cylinders. It is fixed to the base member 4 by four anchor bolts 23 and nuts 24 respectively inserted into the shaped member 12.

Next, a method for constructing the foundation of the columnar object 5 using the foundation construction member 1 will be described.
As shown in FIG. 4A, first, the excavator 20 such as a hand auger is formed in the ground where the columnar object 5 is erected, and the portion near the ground surface of the excavator 20 is excavated. To do.

  Next, as shown in FIG. 4B, the foundation construction member 1 is inserted into the excavation hole 20. 4C, an injection pump (not shown) for injecting mortar 21 is connected to the injection tube 8, and the mortar 21 is added into the bag 3 from the injection tube 8 through the injection port 2b. Inject pressure. Then, the bag 3 is expanded by the injected mortar 21 and pushes the side wall of the excavation hole 20, so that the cylindrical body 2 inside the bag 3 is fixed in the excavation hole 20 in an upright state. Note that if the injection pressure of the mortar 21 is too small, the bag body 3 does not securely adhere to the side wall of the excavation hole 20, and the cylindrical body 2 is wobbled in the excavation hole 20. Conversely, if the injection pressure is too high, the pressure resistance of the bag 3 will be exceeded, and the bag 3 may break. For this purpose, a measuring instrument (not shown) for measuring the injection pressure is installed between the injection pump and the injection pipe 8 so that the injection pressure can be adjusted to an appropriate value based on the value measured by the measuring instrument. Keep it. In this embodiment, the injection pressure of this mortar 21 is about 0.6 MPa, and the injection speed at that time is 5 L / min. Subsequently, the mortar 21 is also injected into the cylindrical body 2.

  The base member of the foundation building member 1 is attached so that the columnar object 5 is attached in a vertical state with the mortar 21 injected into the bag 3 and the foundation building member 1 fixed in the excavation hole 20. After the plate is temporarily attached to the anchor bolts 23 and nuts 24 and the heights of the anchor bolts 23 and nuts are adjusted, the columnar object 5 is attached to the base member 4. Depending on how the bags 3 overlap in the excavation holes 20, the foundation construction member 1 may slightly rotate in the excavation holes 20 when the bags 3 expand. After the bolt 15 (see FIGS. 1 and 2) is loosened and the angle of the base member 4 with respect to the cylindrical body 2 is adjusted, the columnar object 5 is attached to the base member 4.

  Thus, the columnar object 5 can be attached to the base member 4 immediately after the mortar 21 is injected into the bag 3. Even after the columnar object 5 is attached to the base member 4, the verticality (tilt with respect to the ground) of the columnar object 5 can be easily adjusted by adjusting the height of the anchor bolt 23 with the nut 24. It is.

  Finally, the mortar 25 is also poured into the portion around the base member 4 in the excavation hole 20 to complete the construction work of the foundation 100. At this time, the mortar 25 is directly injected into the excavation hole 20 using a container or the like, and the injected mortar 25 is vibrated by a vibrator and compacted.

  In this way, by injecting the mortar 21 into the bag 3, the foundation building member 1 can be fixed in the excavation hole 20 to quickly build the foundation, and then the columnar object 5 is immediately attached to the base member. 4 can be attached. Therefore, the foundation construction work of the columnar object 5 can be completed in a short time, and the construction cost can be reduced. In some cases, it is possible to complete all work in one day.

  In addition, since the foundation building member 1 includes the base member 4 for attaching the anchor bolt 23, the height of the anchor bolt 23 is adjusted even after the columnar object 5 is attached to the foundation building member 1. By doing, the perpendicularity of the columnar object 5 can be adjusted easily. Further, the load acting on the cylindrical member 12 from the columnar object 5 via the anchor bolt 23 is evenly distributed to the four plate-shaped members 11 extending radially from the base body 10. 5 is stably supported.

Next, modified embodiments in which various modifications are made to the embodiment will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.
1] The structure of the base member 4 to which the anchor bolt 23 is attached is not limited to that of the above embodiment. For example, the number of anchor bolts 23 attached by increasing or decreasing the number of plate-like members 11 may be changed. Alternatively, instead of the base main body 10 and the plurality of plate-like members 11, a relatively thick one or a plurality of laminated plate materials spreading in a plane in the radial direction of the cylindrical body 2 are attached to the cylindrical body 2. A structure may be adopted in which a plurality of anchor bolts 23 are attached to the edge portion.

  2] As the pressurized fluid to be injected into the bag 3, a fluid that does not solidify, such as water, can be used in addition to the fluid solidifying material such as mortar and concrete of the above embodiment. When using a fluid such as water, it is easy to drain the water in the bag and remove the pillar again after installing the pillar, and when building a foundation for a temporary pillar Especially suitable.

It is a top view of the member for foundation construction concerning the embodiment of the present invention. It is the II-II sectional view taken on the line of FIG. It is a top view of a bag. It is a figure which shows the process of the foundation construction work of a columnar thing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base construction member 2 Cylindrical body 3 Bag body 4 Base member 5 Columnar object 10 Base main body 11 Plate-shaped member 12 Cylindrical member 15 Push bolt 20 Excavation hole 21 Mortar 23 Anchor bolt

Claims (7)

For building a foundation for building a foundation for a columnar object standing on the ground, which has a rigid tubular body and a bag body fixed to the tubular body in a state of covering the outer surface of the tubular body Inserting the member into a hole previously formed in the ground;
Injecting a pressurized fluid into the bag to inflate the bag in the hole;
A foundation construction method for a columnar article characterized by comprising:   2. The columnar object according to claim 1, wherein the foundation building member includes a base member provided at an end portion of the cylindrical body and to which a plurality of anchor bolts for fixing the columnar object are attached. Foundation construction method.   The bag body is a seamless tubular woven fabric composed of a plurality of warps and wefts that are continuously woven in a spiral shape with respect to these warps. The method of building a foundation for columnar objects according to claim 1, wherein the fabric is a cylindrical fabric having a different diameter. A member for building a foundation for building a foundation of a columnar object standing on the ground,
A rigid cylinder,
A bag body fixed to the cylindrical body in a state of covering the outer surface of the cylindrical body;
A base member provided at an end of the cylindrical body and to which a plurality of anchor bolts for fixing the columnar object are attached;
A member for foundation construction of a columnar article characterized by comprising: The base member is
A cylindrical base body attached to an end of the cylindrical body;
A plurality of plate-like members extending radially outward from the base body in the radial direction of the base body and parallel to the length direction of the base body;
A plurality of cylindrical members provided respectively at ends of the plurality of plate-like members on the side opposite to the base body, and parallel to the length direction of the cylindrical base body;
The member for foundation construction of a columnar article according to claim 4, wherein The base body is rotatably attached to the end of the cylindrical body,
6. The member for constructing a foundation for a columnar object according to claim 5, wherein the base member has fixing means for fixing the base body to the cylindrical body so as not to rotate. A rigid cylindrical body, a bag body fixed to the cylindrical body in a state of being covered on the outer surface of the cylindrical body, and a plurality of members provided at an end of the cylindrical body and for fixing the columnar body A base member to which the anchor bolt is attached, and a foundation construction member inserted into a hole formed in the ground,
A pressurized fluid injected into the bag;
The basic structure of the columnar object characterized by including.

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