JP6283906B2 - Prop foundation - Google Patents

Description

  The present invention relates to a foundation for holding a columnar object such as a column of a building structure.

  When installing large-scale agricultural greenhouses or large-scale photovoltaic power generation facilities, such as so-called mega-solar facilities, concrete or reinforced concrete floors (slabs) are used as the foundation to support the stands on which the columns and solar panels are placed. Is used. Specifically, the buried part at the bottom of the column is hardened with concrete and buried in the ground, or a concrete foundation with an anchor is placed in advance on the ground, and the anchor bolt is installed on the anchor bolt. The part is connected and fixed.

  Conventional concrete floor foundation work requires concrete mixer trucks and concrete formwork for placing concrete on-site, and further requires a curing period of about one month after placing concrete. After the concrete is hardened, it is necessary to remove the formwork. In particular, to form a concrete slab on a large site such as a mega solar facility requires a great deal of cost and construction period.

  On the other hand, if the concrete buried part at the bottom of the support column is brought into the site as a form that has been prepared in advance in a factory etc., and the method of backfilling the concrete part in the hole excavated in the ground is used, the site work is simplified and the construction period is shortened. . However, in order to install such a heavy object on the site, it is difficult to carry out construction in a place where roads are narrow such as inefficiencies of transportation and mountainous areas where heavy machinery cannot pass.

  Therefore, for example, a foundation of a columnar structure that holds a pole with a foundation mainly composed of a foamed synthetic resin formed body, the foundation is a foamed molded body, and reinforcing members such as iron plates and reinforcing bars arranged on the surface and inside thereof It is a complex with a light weight, solves various problems associated with heavy load transportation and installation work with large heavy machinery in the installation of columnar structures, and on-site work of concrete, and has a short construction period, is inexpensive, and has a wide range of columnar shapes. A foundation applicable to a structure has been proposed (see Patent Document 1). In addition, the soil slab and the column base support block that supports the column base of the temporary structure are integrally constructed on the ground with cast-in-place concrete, and precast concrete for weight is placed on both sides of the column base support block. Multiple blocks are installed, and the column base support block and the precast concrete block for weight are united with PC steel that is penetrated in the horizontal direction in common, and when removing a large-scale temporary structure A basic structure that can efficiently perform dismantling / removal work has been proposed (see Patent Document 2).

Japanese Patent Laid-Open No. 11-152759 JP 2000-156158 A

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a strut foundation that can be constructed very easily and at low cost.

For this reason, the strut foundation of the present invention is embedded in the ground, and is at least a pair of precast concrete anchor blocks arranged substantially parallel or orthogonally and spaced apart by a predetermined interval, and the pair of anchor blocks . together is placed across the gap, it consists of a post fixing block having a through hole of the anchor bolt, and the strut fixing block and angled connecting member for connecting and fixing supports disposed thereon, A first feature is that anchor bolts from the support block are suspended and fixed with reinforcing steel materials arranged on both sides of the anchor block, and mortar concrete is placed in the gap. . Further, the anchor block, a ground beam for connecting a plurality of the anchor block between the horizontal connecting rod is a second feature in that a matable transverse groove line. Furthermore, the third feature is that the anchor block has a substantially trapezoidal shape with an inclined surface that expands downward .

  The support foundation according to the present invention uses a precast concrete forming block instead of a conventional concrete slab foundation, which eliminates the need for concrete placing work, removal of the formwork associated therewith, and large heavy machinery. The construction period is short.

It is a front view which shows the support | pillar foundation which concerns on this invention. It is a top view of the foundation block concerning the present invention. It is a top view which shows typically the installation state of the support | pillar foundation which concerns on this invention. It is a front view which shows the other usage method of the support | pillar foundation which concerns on this invention.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 3, embodiment of the support | pillar foundation which concerns on this invention is described. Needless to say, the present invention is not limited to the examples described below.

  As shown in FIGS. 1 and 2, the strut foundation according to the present invention is embedded in the ground E and at least a pair of anchor blocks 1 disposed substantially parallel or orthogonally spaced apart at a predetermined interval. 1, a column fixing block 3 placed across the pair of anchor blocks 1, 1, and a connection plate 4 for connecting and fixing the column fixing block 3 and the column 2.

  The strut foundation is mainly composed of, for example, a pair of precast concrete square anchor blocks 1, 1, and anchor bolts 3 from the strut fixing block 3 are suspended in the gap between both anchor blocks 1, 1. The reinforcing steel materials 8 and 8 are disposed and fixed, and the mortar concrete 6 is placed in the space. Here, in this embodiment, the transverse cross section of the anchor blocks 1 and 1 has a substantially trapezoidal shape with an inclined surface 1b that expands downward, and is pressed downward by backfill earth pressure and pulled out from the ground. The strength is improved.

  The support block 3 has a through-hole 3a through which the anchor bolt 3 is passed, and bolts and nuts are connected to the support column 2 standing on the support block 3 and an angled connecting plate 4. 9 is fastened and fixed.

Further, the anchor block 1,1, which connecting rod 7 is provided fittable connecting transverse groove line 1a for connecting the other of the anchor block 1 and 1 with each other in the horizontal direction, shown in FIG. 3 As described above, the strut foundations arranged at predetermined locations on the foundation surface are tensioned in common to the long connecting rods 7 (usually reinforcing bars), thereby fulfilling the function of the underground beam to stabilize the horizontal direction on the foundation surface. .

The anchor blocks 1 and 1 can be used with appropriate hardness depending on the use situation, and when the load such as the weight of the support column 2 is large or a structure to which external force is easily applied, or for the purpose of preventing cracking The steel plate may be reinforced. For example, as shown in FIG. 4, in an angle steel column 2 or the like, the steel plate surface is sandwiched from the left and right by a pair of connecting plates 4 and is fixed to the column fixing block 3 using two anchor bolts 5. .

  Depending on the moisture content and properties of the surrounding soil, the surfaces of the anchor blocks 1 and 1 can be covered with a synthetic resin or the like to prevent collapse or corrosion. The anchor blocks 1 and 1 have an outer shape that is not a rectangular shape as in the present embodiment, but can be appropriately formed according to the application, such as a cylindrical shape or a polygonal column shape. In this case, an adhesive or mortar is applied to the joint between the support 2 and the anchor blocks 1 and 1 in order to prevent displacement and rotation after the support 2 is attached and to firmly fix the support 2. Or it can be fastened with a band or the like.

1 Anchor block (precast)
1a connecting the lateral groove line 1b inclined surface 2 posts (manufactured by wood or steel)
3 Prop fixing block 3a Bolt through hole 4 Connecting plate 5 Anchor bolt 6 Placing mortar concrete 7 Connecting rod (rebar)
8 Vertical bolt holding steel
9 Prop fixing bolt E Underground

Claims (3)

While being buried in the ground, at least a pair of precast concrete anchor blocks are spaced at a predetermined interval and substantially parallel or perpendicular, while being placed across the gap between the pair of the anchor block The anchor fixing block having a through hole for the anchor bolt, and an angle-shaped connecting member for connecting and fixing the supporting pole block and the supporting pillar erected on the supporting block, the anchor bolt from the supporting pillar fixing block. A pillar foundation comprising: a mortar concrete that is suspended and fixed by a reinforcing steel material disposed on both of the anchor blocks, and mortar concrete is placed in the gap . The anchor block, pillar foundation of claim 1 wherein the underground beams for connecting a plurality of the anchor block between the horizontal connecting rod is characterized in that a matable transverse groove line. The support foundation according to claim 1 or 2, wherein the anchor block has a substantially trapezoidal shape with an inclined surface that expands downward .

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