JPH08226244A - Foundation structure of two-story parking device - Google Patents

Abstract

PURPOSE: To reduce a construction cost required for foundation work while securing a required strength with regards to a foundation structure of a two- story parking device. CONSTITUTION: A concrete layer 21 having no reinforcing bars is installed on a ground G. A plurality of concrete short posts 23 buried in the ground, centering on the vicinity of each of bolt installation positions 29a, 29b and 29c equivalent to each anchor bolt of a base plate of a double stage parking device is connected to the concrete layer 21 on the upper end and laid out symmetrically, centering on the vicinity of teach bolt installation position while each vertical reinforcement 24 whose lower part is driven into the ground and each upper part of sloping reinforcements 25 are combined with the concrete short post. Anchor bolts, whose upper end is projected from the top of the concrete short post and inserted into each anchor bolt, are buried and fixedly installed at each bolt installation position which is the central part of each concrete short post.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a plurality of anchor bolts which are inserted into a plurality of anchor bolt holes formed in a base plate of a two-stage parking device to fix the same.
The present invention relates to a basic structure of a two-stage parking device that is embedded and fixed except an upper end portion that is inserted into an anchor bolt hole of a base plate.

[0002]

2. Description of the Related Art First, referring to FIGS. 6 and 7, an example of a two-tiered parking system installed on the ground through a foundation structure of this type will be described. A pallet 13 for mounting a vehicle is erected on a base plate 10. It is supported by an arm assembly 12 that is guided and supported so as to be able to move up and down by the pair of columns 11 and is moved up and down by a motor (not shown). As a result, another vehicle can be parked in the space below the raised pallet 13. The column 11 is covered with a cover 15 in a use state.

In such a two-tiered parking system, four anchor bolt holes 14a are formed in the base plate 10 at the upper end portion of the four anchor bolts 6 fixedly embedded in the concrete 2 of the foundation 1 and protruding upward from the concrete 2. , 14b,
It is installed by inserting 14c and tightening it with a nut.

Such a conventional foundation 1 is shown in FIGS. 8 and 9.
As shown in, the ground bolt G is dug to a predetermined depth, and the anchor bolts 6 are placed on the crushed stone layer 4 formed by laying and crushing split stones.
It is formed by striking concrete 2 thicker than the burial depth. The concrete 2 has reinforcing bars 3 laid in a lattice shape and having crossed portions tied together with a wire, embedded in the middle portion in the thickness direction to reinforce the entire surface. The reinforcing bars 3 are arranged so as to avoid the bolt installation positions 5a, 5b, 5c where the anchor bolts 6 are provided, and bolt embedding holes are formed at these positions to anchor and fix the anchor bolts 6. For example, as shown in FIG. 6, the concrete 2 has a width approximately the same as the pallet 13 and a length slightly larger than the width of the base plate 10, but the length may be approximately the same as the pallet 13. . Strike anchor bolts and chemical anchor bolts (details will be described later) are used as the anchor bolts 6,
Concrete 2 is constructed by using a formwork if necessary.

[0005]

In the foundation of the prior art described above, the entire concrete is made thicker than the burial depth of the anchor bolts and entirely reinforced by the reinforcing bars 3, so that the area of foundation work for reinforcement becomes large. At the same time, there is a problem that the amount of concrete and reinforcing bars increases, and thus the cost required for foundation work increases. An object of the present invention is to reduce the cost required for foundation work by reducing the area of foundation work where reinforcement is provided while ensuring the required strength.

[0006]

To this end, the basic structure of a two-tiered parking system according to the present invention comprises a concrete layer provided on the ground over a wider area than the base plate of the two-tiered parking system and having no reinforcing bars. , A plurality of concrete short columns that are buried in the ground centered around each bolt installation position corresponding to each anchor bolt hole of the base plate and the upper end is connected to the concrete layer, and approximately symmetrical about each bolt installation position Vertical bars, which are vertically arranged and are driven vertically into the ground, and the upper parts other than this lower part are integrally connected to the concrete short columns, and the vertical bars are centered around the bolt installation positions. 〞Symmetrically arranged in the shape of a figure that spreads downward, each lower part is driven into the ground and each upper part except this lower part is integrated with the concrete short column It is characterized by having a plurality of combined inclined rebars and a plurality of anchor bolts that are embedded and fixed at each bolt installation position that is the center of each concrete short column and whose upper end projects from the upper surface of the concrete short column. It is a thing.

[0007]

The anchor bolts are embedded and fixed at the center of a concrete short column which is buried in the ground and whose upper end is connected to the concrete layer. The upper end of the anchor bolt is projected from the upper surface of the concrete short column. The base plate of the two-tiered parking system is
Each anchor bolt hole is inserted into and fixed to the upper end portion. Each concrete short pillar is not only buried in the ground, but also each upper part of each vertical bar and inclined reinforcing bar whose upper part is integrally connected to each concrete short bar 23 is lower part is driven into the ground and connected to the ground. Since the strength is reinforced, the bond strength of each concrete short column to the ground is sufficiently large.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The basic structure of the two-stage parking apparatus according to the present invention will be described below with reference to the embodiments shown in FIGS. The two-stage parking device installed according to the present invention is the same as that shown in FIGS. 6 and 7 described above in connection with the prior art.

As shown in FIGS. 1 and 2, the structure of the foundation 20 according to the present embodiment has a concrete layer 21 thinner than the conventional one.
And anchoring anchor bolts 31 and 36 which will be described later by embedding 4
It consists of individual concrete short columns 23. The concrete layer 21 is thinner than the buried depth of the anchor bolts 31 and 36 and has no reinforcing reinforcing bar, and is provided over a wider area than the base plate 10 of the two-tiered parking system. The width of the concrete layer 21 of this embodiment is about the same as the width of the pallet 13 and the length thereof is about twice the width of the base plate 10. However, the width is the same as that of the pallet 13 and the length of the concrete layer 21 is about the same as that of the pallet 13. The concrete layer 21 may be provided over the same area or over a wider area. The concrete layer 21 is provided on the crushed stone layer 22.

Each short concrete column 23 is an anchor bolt hole 14a provided in the base plate 10 of the two-stage parking device,
The bolts are embedded in the ground G around the bolt installation positions 29a, 29b, 29c corresponding to 14b, 14c (see FIG. 7), and the upper ends of the bolts are connected to the concrete layer 21. Each of the concrete short columns 23 is a substantially columnar shape having a thick lower portion embedded in the ground G, and the upper half of each of the four vertical reinforcing bars 24 and the inclined reinforcing bars 25 is integrally embedded and fixed. Each vertical rebar 24 is a concrete short column 2
Each bolt installation position 29a, 29b, 29 which becomes the center of 3
The lower halves of the concrete short columns 23, which are arranged substantially symmetrically and vertically about c, and project from the concrete short columns 23, are driven into the ground G. Similar to the vertical reinforcing bar 24, the upper half of each inclined reinforcing bar 25 is integrally connected to the concrete short column 23 except that the upper end of the inclined reinforcing bar 25 is bound to the upper end of each vertical reinforcing bar 24 by a wire 26 and extends downward. The lower half parts protruding from the concrete short columns 23 are driven into the ground G. Reinforcing bars 24 and 25 are located in the peripheral part of the concrete short column 23 except the central part, and the concrete short column 2
It does not project upward from 3.

One anchor bolt 31, 36 is embedded and fixed at each bolt installation position 29a, 29b, 29c, which is the central portion of each concrete short column 23, and each upper end portion is from the upper surface of the concrete short column 23. It is protruding. A strike anchor bolt 31 having a weak pull-out strength is installed for the purpose of positioning at a bolt installation position 29a at the center of the concrete short column 23 corresponding to the anchor bolt hole 14a located at the center among the anchor bolt holes of the base plate 10. Bolt installation positions 29b, 2 at the center of the concrete short column 23 corresponding to the anchor bolt holes 14b, 14c of
9c is a chemical anchor bolt 3 with high pull-out strength.
6 is installed.

Next, a concrete construction process of the basic structure of the two-tiered parking system of the above embodiment will be described with reference to FIGS. First, the ground G is dug to a predetermined depth shallower than the conventional one, and a crushed stone is laid on the bottom of the ground to crush and form a crushed stone layer 22. A mold is provided on the crushed stone layer 22, cement and sand are mixed therein, gravel is added as an aggregate, and concrete kneaded with water is poured into the crushed stone layer 22. After the hardening, the mold is removed, and the concrete layer 21
To form. The concrete layer 21 is relatively thin 60 to 8
This construction is extremely simple because it is about 0 mm and no reinforcing bars are provided. In this state, the concrete short columns 23 are not provided. The concrete layer 21 has a thickness of 60.
If there is an existing concrete layer of mm or more, it may be used.

Next, the anchor bolt holes 14a, 14b, 14
Using the template according to c, use chalk to install four bolts on the concrete layer 21.
Scribing 9a, 29b, 29c, and scribing a circle corresponding to the upper openings 27a of the four excavation holes 27 for the concrete short columns 23 centering on each installation position. Then, as shown in FIG. 3 (a), an upper opening 27a is opened in the concrete layer 21 with a chipping tool, the crushed stone layer 22 and the ground G are excavated with a small scoop to form a short column forming hole 27, and a plasterer is formed at the bottom. Sand is laid and compacted to form a sand layer 28. In this embodiment,
The diameter of the upper opening 27a of the short column forming hole 27 is 200 mm, the depth is 250 mm from the surface of the concrete layer 21, and the lower portion 27b of the short column forming hole 27 is thicker than the upper opening 27a and its diameter is 300 mm.

Next, as shown in FIG. 3 (b), four bar-shaped deformed rebars 24 having a diameter of 10 mm and a length of 550 mm each having a large number of irregularities extending in the circumferential direction formed on the outer peripheral surface thereof are installed at bolt mounting positions. 29A, 29b, and 29c are arranged point-symmetrically and vertically, and the lower part of the deformed bar 24 is driven into the ground G at the bottom of the short column forming hole 27 by a hammer. Further, four inclined deformed reinforcing bars 25 having the same shape and dimensions are driven outwardly and obliquely downward from the upper end portion of the vertical deformed reinforcing bars 24 and similarly driven into the ground G. Both of the reinforcing bars 24 and 25 are driven in until the upper ends thereof are located 10 mm below the upper surface of the concrete layer 21, and the upper ends of the reinforcing bars 24 and 25 are crossed to some extent and bound by a wire 26.

Next, as shown in FIG. 3 (c), mortar prepared by mixing ordinary portland cement and plaster sand in each short column forming hole 27 and kneading with water is poured into the short column forming hole 27. When the curing period (for example, 5 days in summer, 7 days in winter) has elapsed and it has completely hardened, the upper end will be the concrete layer 2
A concrete short column 23, which is connected to 1 and in which the upper half except the lower half of each of the four vertically deformed reinforcing bars 24 and the inclined deformed reinforcing bars 25 in which the lower half is driven into the ground G is integrally joined, can get. In this way, each concrete short column 23 is not only embedded in the ground G with a thicker lower part, but also each upper part is integrally connected to each concrete short column 23, and each vertical reinforcing bar 24 and inclined reinforcing bar 25 are connected. Since the lower part is driven into the ground G to reinforce the bonding strength to the ground G, the bonding strength of each concrete short column 23 to the ground G becomes sufficiently large.

Next, the anchor bolts 31, 36 fixed to the center of each concrete short column 23 and the burying process thereof will be described with reference to FIGS. 4 and 5. First, the base plate 10 of the two-stage parking device is placed on the concrete layer 21 and the concrete short columns 23, and the anchor bolt holes 14a, 14b, 14 are provided.
c and the bolt installation position 2 at the center of each concrete short column 23
Positioning is performed so that 9a, 29b, and 29c match.

Since the strike anchor bolt 31 corresponding to the anchor bolt hole 14a in the center of the base plate 10 is installed before the chemical anchor bolt 36, its embedding process will be described with reference to FIG. Strike anchor bolt 3
As shown in (b) and (c) of FIG. 3, 1 is equipped with a coaxially provided pin 32, and if it is driven in, the strike anchor bolt 31 divided into a plurality of axial slits 31.
The tip end portion 31a is pushed open by the tip end portion 32a of the pin 32, and the outer periphery of the tip end portion 31a of the strike anchor bolt 31 is provided with unevenness in the circumferential direction.
First, as shown in FIG. 4 (a), a predetermined bolt embedding hole 30 (diameter 17 mm, depth 90 in this embodiment) is concentric with the anchor bolt hole 14a at the center of the concrete short column 23 by a drill.
mm), cut off the cutting powder with a metal brush, and completely remove the cutting powder with a blower.

Next, as shown in FIG. 4 (b), a strike anchor bolt 31 having a nut 33 and a washer 33a screwed together at a predetermined position is provided.
It is inserted through the anchor bolt hole 14a of the base plate 10 so as to reach a predetermined depth therein. And pin 32
When the upper end of the strike anchor bolt 31 is driven by the hammer 34, the strike anchor bolt 31 is fixed by being engaged with the inner surface of the bolt embedding hole 30 with the tip end 31a thereof being opened, as shown in FIG. 3 (c).
In this state, tighten the nut 33 to tighten the base plate 10
Fix it so that it does not move. The strike anchor bolt 31 of this embodiment has an outer diameter of 16 mm and a length of 150 mm, and the protrusion amount from the upper surface of the base plate 10 is 25 mm.

Next, the step of burying the three chemical anchor bolts 36 will be described with reference to FIG. The anchor capsule 37 to which the chemical anchor bolt 36, which is a normal stud bolt, is fixed, has an adhesive such as an uncured epoxy acrylate resin enclosed in a glass capsule having a plurality of constrictions formed on the outer peripheral surface, and is formed in the outer constriction portion. It has a curing agent. First, as shown in FIG. 5 (a), a predetermined bolt embedding hole 35 (diameter: 19 mm, depth: 14 mm) is concentric with the anchor bolt holes 14b, 14c at the center of the concrete short column 23 by a drill.
0 mm) is perforated and the chips are completely removed as in the case of the strike anchor bolt 31.

Next, as shown in FIG. 5 (b), an anchor capsule 37 (diameter 16.5 mm, length 120 mm) is inserted into the bolt embedding hole 35, and the stopper 3 is inserted as shown in FIG. 5 (c).
The chemical anchor bolt 36 in which 8 is inserted is inserted from the anchor bolt hole 14b and driven by the hammer 39. As a result, the glass of the anchor capsule 37 is crushed, and the adhesive, the curing agent, and the crushed glass fragments are mixed, and the mixture 37
As shown in FIG. 3D, A is filled between the bolt embedding hole 35 and the chemical anchor bolt 36. After a predetermined curing time (for example, 160 minutes at 0 ° C., 20 minutes at 30 ° C.), the mixture 37A is cured and the chemical anchor bolt 3
6 is embedded and fixed in the concrete short column 23. In this state, the nut 33 is tightened to firmly fix the base plate 10. The chemical anchor bolt 36 provided at the bolt installation position 29b has an outer diameter of 16 mm and a length of 200 mm.
The amount of protrusion from the upper surface of the base plate 10 is 25 mm.
Anchor bolt hole 14c at the tip of the base plate 10
Is provided with a spot facing as shown by the chain double-dashed line in Fig. 5 (a),
The chemical anchor bolt 36 provided at the bolt installation position 29c has an outer diameter of 16 mm and a length of 175 mm, and its tip is almost level with the upper surface of the base plate 10.

As described above, the anchor bolts 31 and 36 are
It is embedded and fixed in each bolt installation position 29a, 29b, 29c which becomes the center part of each concrete short pillar 23, and each upper end projects from the upper surface of the concrete short pillar 23. Anchor bolts 31 at bolt installation positions 29a and 29b other than the bolt installation position 29c which is the tip of the base plate 10,
The upper end of 36 is a cover 1 that covers the pillar 11 of the two-stage parking device.
Located within 5.

[0022]

As described above, according to the present invention, since the foundation work for providing the reinforcement is only near each concrete short column in which the anchor bolt is buried, the area of such foundation work is reduced and the concrete and The amount of reinforcing bars used is reduced, and therefore the cost required for foundation work can be reduced. Moreover, since the vertical reinforcing bars and the inclined reinforcing bars secure the necessary bonding strength to the ground in each concrete short column, the mounting strength of the base plate does not decrease.

[Brief description of drawings]

FIG. 1 is an overall plan view showing an embodiment of a basic structure of a two-stage parking device according to the present invention.

2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an explanatory view of a concrete short column of the embodiment shown in FIG. 1 and a construction process for reinforcement thereof.

FIG. 4 is an explanatory diagram of a process of constructing a strike anchor bolt.

FIG. 5 is an explanatory diagram of a process of constructing a chemical anchor bolt.

FIG. 6 is an overall perspective view of an example of a two-stage parking device installed according to the present invention.

FIG. 7 is a plan view of a base plate of the two-stage parking device shown in FIG.

FIG. 8 is an overall plan view showing an example of a basic structure of a two-stage parking device according to a conventional technique.

9 is a cross-sectional view of the basic structure shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Base plate, 14a, 14b, 14c ... Anchor bolt hole, 21 ... Concrete layer, 23 ... Concrete short column, 24 ... Vertical reinforcing bar, 25 ... Inclined reinforcing bar, 29a, 2
9b, 29c ... Bolt installation position, 31, 36 ... Anchor bolt, G ... Ground.

Claims (1)

[Claims] 1. A basic structure of a two-tiered parking apparatus in which a plurality of anchor bolts for fixing a base plate of the two-tiered parking apparatus are embedded and fixed except an upper end portion which is inserted into an anchor bolt hole formed in the base plate. A concrete layer provided on the ground over a range wider than the base plate and having no reinforcing bar, and an upper end portion embedded in the ground centering around each bolt installation position corresponding to each anchor bolt hole and the concrete layer. A plurality of connected concrete short pillars, and they are arranged almost symmetrically and almost vertically with the vicinity of each bolt installation position as the center, each lower part is driven into the ground, and each upper part other than this lower part is the concrete A plurality of vertical rebars that are integrally connected to the short columns, and are approximately symmetrical and lower with the vicinity of each bolt installation position as the center. A plurality of slanted reinforcing bars arranged in an octagonal shape in which each lower part is driven into the ground and each upper part except this lower part is integrally connected to the concrete short column, and the central part of each concrete short column. A basic structure of a two-tiered parking device, comprising a plurality of anchor bolts, which are embedded and fixed at the respective bolt installation positions and whose upper end projects from the upper surface of the concrete short column.