JP2935591B2 - Semi-underground multi-story parking lot unit and construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking facility, and more particularly to a two-storey semi-underground multi-story parking unit in which the first floor is housed underground, that is, an underground vertical carport and a method of constructing the same. About.

[0002]

2. Description of the Related Art Recently, various multi-story parking facilities have been announced with the recent shortage of parking lots. For example, Japanese Patent Application Laid-Open
No. 23223, No. 56-31968, No. 58-19
Nos. 1874 and 61-242277.

[0003]

However, these prior art parking lot facilities require a large-scale underground excavation device and a large-scale excavation work associated therewith, and it is very difficult to carry out the excavation work. It had to be set up at the same time, and it could hardly be used in the case of forming an underground parking space under the existing parking lot on residential land. In addition, in conventional semi-underground two-story parking lots, water droplets are generated on the wall of the underground parking lot, and abnormalities may occur in the electronic devices in the vehicle body, especially when parking in that place for a long time. Was. The present invention solves such a problem.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention discloses a novel semi-underground type two-story parking lot and a method of setting up the same. In particular, a semi-underground two-story parking lot can be set up in a convenient and new way at the basement of the existing parking lot in the residential land or at the planned parking space,
Also, the present invention provides a parking lot unit having a multi-layered wall having a remarkable moisture-proof effect such that moisture does not blow out to the wall surface of the semi-underground parking lot.

[0005]

According to the present invention, after removing the minimum amount of sediment in the underground part by a safe method that does not damage the excavation wall, the vertical frame that forms the basis of the multi-story parking lot unit is formed using a simple assembly. Installation, then forming the floor,
Then, the side wall surface is quickly formed. In addition, when forming the floor surface and the side wall surface, a special multi-layer structure is employed to completely prevent the generation of moisture. In addition, it adopts an extremely safe and stable screw mechanism for storing vehicles in a semi-underground parking lot, and a simple unitized parking lot can be formed by using the vertical frame extending from the basement to the first floor above the ground, The use of special couplings can completely prevent the inflow of water from the side wall between the basement and the first floor and between the floorboard and the side wall, and can provide a safe multi-storey parking space that can store two cars safely by simple construction. It is.

[0006]

1 is a side view showing a state where two cars are accommodated in a multi-story parking lot 10 according to the present invention. As shown in the figure, the first floor portion of the parking lot is located underground, and only the second floor portion is located at substantially the same level as the ground. Such a semi-underground two-storey parking lot does not deteriorate the landscape of the garden as compared with the case of constructing a two-story garage on the ground, and also prevents the sunshine from being restricted to the garden flowers. Can be.

The multi-story parking garage 10 of the present invention generally comprises at least four vertically extending vertical frames 12 forming the framework of the parking garage 10 and two supporting two cars, respectively. Parking lots 14, 16 and these parking lots 1
It comprises at least four spacer members 18 that connect the parking pedestals 4, 16 at regular intervals, and an elevating device 20 (FIG. 6) that moves the parking pedestals 14, 16 up and down.

Since the parking spaces 14 and 16 have substantially the same structure, only the parking space 14 will be described below.

As shown in FIGS. 1 to 5, the parking pedestal 14 comprises a plate member 22 preferably made of a rigid body such as an iron plate, and a frame 24 (FIG. 5) supporting the plate member. The frame 24 includes a plurality of longitudinal frames 26 and a plurality of lateral frames 2.
8 are fixedly formed in a lattice shape. A pair of guide rails 30 for guiding wheels are provided on the upper surface of the plate member 22 so as to be adjustable in the width direction with screws 32 or the like.
8 is fixed. Therefore, for example, the horizontal frame 2
8 is provided with a long groove (not shown). This rail 30
Has a generally U-shaped cross-section, receives wheels in its recesses, and guides the vehicle body so that it can be parked at a predetermined position on the parking pedestal 14. At the entrance end of the rail 30, the width of the concave portion of the rail is gradually widened, and the rising amount on both sides of the concave portion is gradually reduced to facilitate the guidance of the vehicle. This makes it easy to put the garage in a predetermined position and prevents the corners of the vehicle body from coming into contact with the wall surface of the parking lot when the parking platform 14 is lowered. In addition, in consideration of the case where the dimensions of the storage vehicle body vary, the position of the stopper in addition to the rail can be appropriately adjusted, for example, the rail is mounted so as to be adjustable in the longitudinal direction of the rail. Further, the left and right stoppers 34 may be configured as one stopper connected to each other. As a result, even when the vehicle is derailed from the rail 30, the vehicle can be reliably stopped. Elevating device 2 for vertically moving parking pedestal 14
4 is a threaded column 36 having at least four screws of the same pitch, which are provided vertically in front and rear of the parking pedestals 14 and 16, respectively, as shown in FIGS. A threaded block 38, 40 rotatably supporting each column 36 and fixed to the parking pedestals 14, 16, respectively; four gears 42 fixed to the top of each column 36; A chain 44 extending over these gears 42, a geared motor 46 for driving the chain 44 to rotate in both directions, bearings 48, 50, 52 supporting the upper and lower ends of the column 36, respectively. Consists of

Although not shown, preferably, four gears are similarly arranged below the lower portion of the threaded block 40,
Chains are attached to these in the same manner as in FIG. Thereby, the integrated rotation of each threaded column body 36 can be performed more reliably.

The spacer member 18 which holds the upper and lower parking stands 14 and 16 at a constant interval is made of a C-shaped steel having a predetermined length surrounding the column 36. The upper and lower ends of the spacer member 18 are fixed to the parking stands 14 and 16 by known means, and the spacer moves up and down simultaneously with the vertical movement of the parking stands 14 and 16. Outside the spacer member 18, the vertical frame 12, which is preferably made of C-shaped steel, extends integrally from the floor surface to the ceiling as shown in FIGS. 5 and 7 so as to surround the spacer member 18 from the outside. I have. This allows the spacer member 18 to slide along the C-shaped inner surface of the frame 12 without rattling.

When the motor 46 is driven in this way, the four pillars 36 rotate simultaneously via the chain 44 and the gear 42, and the parking pedestals 14 and 16 are simultaneously moved by the same amount to the frame 12 while maintaining a constant interval. It can move up and down along.

The plate members 22, 22 of the upper and lower parking stands 14, 16
For example, there is a Herten steel having a thickness of 5 mm.
4 and the drain of the lower parking pedestal 16 are communicated by a suitable means known in the art, and the drains from these drains are collected at one place through the drain 128 on the basement floor. Pump 5
The drainage can be drained out of the parking lot at 6. Further, an opening / closing lid 58 for maintaining a pump or the like is attached to one corner of the parking stands 14 and 16.

FIG. 5 shows a frame 2 constituting the parking stands 14 and 16.
4 shows an example. According to this, three longitudinal frames 26 extending to the center and both sides in the longitudinal direction, and three lateral frames 28 arranged to the center and the front and rear parts in the lateral direction.
And consisting of Threaded blocks 38 and 40 screwed to the threaded column 36 are fixed to the front and rear lateral frames 28, respectively. Similarly, these upper and lower frames 2
As described above, the upper and lower ends of the spacer member 18 are fixed between the portions 4 and 24.

Next, a method for constructing a multistory parking lot according to the present invention will be described.

Because many of today's vehicles are equipped with many complex electronic components, exposure to moisture during parking is not a good thing for the vehicle body. Therefore, it is necessary that the underground accommodation part of the multistory parking garage does not contain moisture as much as possible. For this reason, in the present invention, the structure of the underground part in particular is made to have a special waterproof structure, and in the present invention, the following special construction method is provided for quickly and inexpensively constructing the multi-story parking lot.

First, as shown in FIG. 8, a steel fluttering prism 100 is prepared. This fluttering prism 100 has substantially the same size as the floor area of the parking lot to be created.
The flutter angle body 100 has a horizontal flutter angle 102 and a vertical flutter angle 104.
Consisting of In the illustrated example, these flutter angles are two on each side, that is, eight steel flutter angles in total. Each flutter angle has a sheet pile through hole 106 through which a predetermined number of steel sheet piles are passed. Each of the flutter angles 102 and 104 forms a groove 108 in the center of which the cutter enters, and each of the flutter angles 102 and 104 has its end fixed by a screw or the like. It should be noted that, in the flutter angle body 100, it is not essential to have a flap angled through hole inside the groove 108. It is provided so that the work can be continued quickly by changing the flutter angle. Next, this fluttering prism 10
0 is set on the planned parking lot ground. At this time, the fluttering horn is set on the ground so as to be horizontal depending on the level.

Thereafter, as shown in FIG.
The cutter 110 of about M is inserted into the groove 108 of the
And cut the ground approximately 50 cm deep.

When the cutting is completed, the inner or outer flutter angle is removed and the outer or inner flutter angle is moved inward or outward, and the outer or inner flutter angle sheet pile through hole 106 is adjusted to be on the cutting line. .

The earth and sand in the flutter angle body 100 is scraped out with a shovel or the like. In this case, since the ground is cut in advance by the cutter 110, the wall surface does not collapse. After all the soil has been scraped out, the earth and sand is excavated vertically to a floor with a depth of about 1.8 to 1.9M, that is, a floor, using the cut wall surface. Sheet pile through holes 10 provided at flutter angles 102 and 104 sequentially from the place where the flooring surface is finished.
A steel sheet pile 112 having a width of, for example, 25 to 30 cm is vertically inserted into the ground through four sides through 6. This excavation depth varies depending on the height of the accommodation vehicle. Finally, cover the sheet pile with a synthetic resin film bag from the top, and place the sheet pile on the sheet pile for another 20 times as shown in FIG.
Root in the ground about cm. Normally, the depth to the flooring surface should be within 2.0M in principle. The bag hanging on the sheet pile may be covered before driving the sheet pile.

The flooring surface is leveled and solidified as much as possible. After this flooring work is completed, for example,
As shown in FIG. 10, the four vertical frames 12 suspended and disassembled using auxiliary materials or the like are lowered vertically to the flooring surface. At the lower end of each vertical frame 12, an iron mounting plate 114 is fixed in advance. Concrete is poured into the portion where the mounting plate 114 is seated.
As shown in FIG. 1, an approximately 5 cm-thick scrap base 116 is formed on the flooring surface. The frame 12 is smeared on the scrap base 116 and before the scrap solid base is solidified. The frame 12 is gently lowered onto the concrete base 116, and the four vertical frames 12 are fixed with the anchor rebar 118 via the mounting plate 114. If the waste concrete base 116 is solidified, the hanging body shown in FIG. 10 is disassembled, and only the four vertical frames 12 are left on the floor surface.

Next, a base concrete 120 is poured over the entire floor surface to a thickness of about 10 cm. As soon as the base concrete is finished, before the concrete is solidified, a floor plate 122 is evenly laid on the floor of the concrete, a scaffold is laid in parallel on the upper surface, and the floor plate and the concrete are brought into close contact with each other while using a wood stick. Fine adjustment of height.

The floor plate 122 of the present invention is preferably made of an anticorrosive material such as an aluminum plate or a stainless plate having a thickness of about 1 mm, and has a thickness of several cm (for example, 1 to 2 cm) on the entire back surface in contact with concrete. Is sprayed with a foaming material 124. In addition, approximately 5
A tooth-shaped rising piece 126 of about cm is raised. The floor plate 122 has a drainage groove 128, a pump mounting portion 130, and a support hole 13 from which the vertical frame 12 protrudes.
And these can be easily and simultaneously processed by press working. The rising piece 126 constitutes a side wall joint.

The base concrete 12 yet to be solidified
By lowering the floor plate 122 on the surface 0 and performing the above-described fine adjustment, the drain groove 128 and the pump mounting portion 130 of the floor plate 122 sink on the surface of the base concrete 120, and the integration of the base concrete and the floor plate is completed. It is planned. Then, it is desirable to leave for about one hour to cure.

After the floor surface is completely solidified, processing of the side wall surface is started. First, the lower part of the side wall surface plate 134 is fixed to the rising piece 126 of the floor plate 122 with a screw or the like. The foam material 136 is sprayed on the outer surface of the side wall plate 134 in advance similarly to the floor plate 122. Like the floor plate 122, the side wall plate 134 is preferably made of a rustproof material such as aluminum or stainless steel. The height of the side wall face plate 134 is almost the same as the depth of the underground excavation. When the rising and fixing of the side wall surface plate 134 is completed over the entire four peripheries, the elongated H-shaped connector 152 having a cross section as shown in FIG. 14 is fitted into the top end portion of the side wall surface plate as shown in FIG. At this time, four corners are fixed by welding or bolt nuts, with the long leg 154 facing downward on the earth wall side and the short leg 155 facing inward. If necessary, in order to prevent the side wall face plate from falling forward due to brace or the like, the support 138 is chewed through the holding body 160 having a flap angle or the like, the bracket 162, and the like, and raised.

Next, between the sheet pile 112 covered with the film and the side wall face plate 134, the raw concrete 1 is raised to a height of about 100 cm.
After pouring the concrete, the concrete is hardened immediately so that no avatar is generated, and the sheet pile 112 is sequentially removed before the concrete is still hardened. In addition, solidification is performed to remove air and the like in the portion where the sheet pile was contained.
In this case, the film bag previously covered with the sheet pile 112 remains between the earth wall and the concrete, and when removing the sheet pile, the sheet pile is easily lifted without damaging the earth wall.

Next, ready-mixed concrete is poured between the earth wall and the side wall face plate, and one long leg 154 of the modified H-shaped connector 152 is embedded therein and solidified (FIG. 13). If the H-shaped connector is not used, a U-shaped stainless steel cap 142 and an anchor 144 integrated with the cap are engaged with the upper part of the side wall plate 134, and the anchor 144 is buried in the concrete 140 and solidified. You can also. In this way, the connection between the side wall face plate and the side wall earth wall is completed, and curing is performed for a while.
By using a processed plate having a continuous U-shaped cross section or a corrugated cross section of the four side wall surface plates, the engagement between the concrete and the side wall surface can be improved, and an anchor can be eliminated. Further, the strength can be increased by using the side wall face plate having such a shape.

After that, the bearing 52 is arranged in the support hole 132 of the floor plate 122, and the parking stands 14, 16 and the elevating device 20 are attached to this.

Next, the side wall 1 of the second floor of the parking lot 10
46 and roof portion 148 are assembled by known means. A shutter 150 is attached to the front of the garage as needed.
Also, the motor 46 may be fixed to a beam fixed to the upper part of the vertical frame 12, that is, to the horizontal frame 13.

The ground floor side wall 146 is a base floor side wall face plate 13.
Unlike 4, the adhesion of the foam is not necessary, but instead, the outer surface is desirably coated with a weather-resistant paint or the like in order to increase durability. The material of the wall surface 146 may be aluminum, stainless steel, or tin. In the case where these materials are used, the deformed H-shaped connector 152 shown in FIG. 14 described above so as to prevent rainwater or the like from flowing into the parking lot from between the ground side wall portion and the basement side wall portion.
Can be used. That is, the lower end of the side wall 146 is inserted between one short leg 158 and the other long leg 159, and the space between the connector 152 and the side wall 146 is water-sealed by caulking or the like. The use of the connector 152 can completely prevent the inflow of water.

In the above embodiment, the edge of the floor plate 122 is formed as the rising piece 126. However, a double H-shaped connector 156 as shown in FIG. If the L-shaped connection tool 200 is used, it is not necessary to process the edge of the floor panel 122 by raising it. Note that the double L-shaped connector 200 may be connectors 202 and 204 having a cross-sectional shape as shown in FIGS. 16 and 17 in addition to the cross-sectional shape as shown in FIG. These can be integrally processed by, for example, drawing of an iron material, but are not limited thereto. In the double L-shaped connector 200, 202, 204, generally supporting pieces 206, 208 between the distance l ₁ of the horizontal side is smaller than the support piece 210 and 212 between the distance l ₂ vertical side, in the present invention l ₁ is 1.5 mm and l ₂ are suitably about 15 mm. In addition, by making the lower support piece 208 longer than the upper support piece 206 among the horizontal support pieces, it becomes easy to insert the floorboard. Also, of the vertical support pieces, the inner support piece 2
By making the outer support pieces 212 shorter than 10, the caulking material arranged in the relevant portion easily flows outward when the side wall face plate 134 is inserted between the vertical support pieces, so that a preferable result is obtained. The modified H-shaped connector and the double L-shaped connector disclosed herein are not only used in the underground parking lot of the present invention, but can also be used effectively in other general construction sites.

Note that a ladder 156 can be attached to the side wall surface adjacent to the pump attachment portion 130 for maintenance of the pump and the like. In this case, the opening / closing lid 58 of the parking pedestal 16
Is desirably cut out in a U-shape.

When underground spring water exists, it is necessary to discharge this water outdoors. For this reason, in the present invention, a pumping station 300 as shown in FIG. In this kamaba, a hole of a predetermined size is dug in advance below the base concrete 120, and stones are stacked on the periphery and the bottom to form a stone wall 302. Next, for example, PE dibolin (trade name of Torii Chemical Co., Ltd.) is placed inside the stone wall 302.
And a resin container 304 formed of a PBC corrugated tube (trade name of Shin-Etsu Polymer Co., Ltd.) or the like. This container 30
In FIG. 4, a number of small holes 306 are previously formed. Inside the container 304, a float 308 and a submersible pump 310 are arranged. A lid 312 is fixed to the container 304 by a fastener 314. Through the lid 312, a float 308, a drain pipe 316 of the submersible pump 310, and various cables 318 for operating the submersible pump 310 by movement of the float 308 penetrate.

Thus, the spring water flows into the container 304 from the stone wall 302 and the hole 306 of the container. When the float 308 senses the water level and the float rises by a predetermined value or more, the submersible pump 310 starts operating and discharges spring water to the outside.

When spring water is expected from the outside of the side wall concrete 140, a fibrous synthetic resin is previously applied between the concrete 140 and the earth wall to a band composed of a thin fiber group, that is, a resin sheet. What is necessary is just to constitute a water-permeable drainage means, that is, a belt-blind drainage, which is formed by sticking together a series of rods, and to connect the belt-blind drainage to the stone wall 302. In the case of constructing the belt blind drainage, it is only necessary to hit the fiber band to the earth wall with a concrete nail or a known nail before hitting the side wall concrete 140. As a result, water seeping from the ground surface or earth wall is drained by the belt blind drainage 320 and the stone wall 302.
Through the container 304. According to this method, spring water from the ground surface can be guided freely to the drain,
It is easy to install and effective, and the resin fiber protects the ground surface and prevents erosion of the ground, and further minimizes the internal effects on the masonry, sand walls, mortar, slopes, etc. Can be. If water accumulates in the drainage groove 128, the water easily flows into the container 304 by opening the lid 312 of the kiln place 300. Further, if the lid 312 is made of a screen-like material, the water that has entered the drain groove 128 immediately flows from the lid 312 into the container.

As will be apparent to those skilled in the art, underground kettles and belt blind drainage as shown in FIG. 15 are not used only for the underground parking lot of the present invention, but are used for spring water treatment in general underground rooms. Can be used as well.

[0037]

The multi-story parking lot according to the present invention has the following excellent effects.

(1) Since only the second floor portion is located on the ground, there is no hindrance to the landscape of the garden and the sunlight on the garden trees.

(2) Since it is housed underground, it is safe in terms of preventing theft.

(3) The assembling / repairing / inspection and the like are easy due to the ascending / descending movement by the screw drive system of reliable operation, and the construction cost is low.

(4) A special triple structure of concrete-foam-corrosion-resistant plate material on the side wall and floor plate of the underground parking lot having excellent moisture-proof properties, so that the electronic equipment mounted on the vehicle even if parked for a long period of time. Does not adversely affect

(5) By adopting adjustable guide rails and stoppers, the vehicle can be parked easily and safely without damaging the vehicle body and the parking lot with either left or right steering wheel. (6) Due to the use of the spacer, the second floor does not fall into the first floor.

Further, the following effects can be obtained by the special method of the present invention.

(7) Since the excavation shoulder is preliminarily cut off by using the cutter and the flap angle, the ground is not damaged.

(8) Since the steel sheet piles are sequentially laid vertically, the work is quiet.

(9) Since the backfill of the ground is performed by pouring concrete, it is not necessary to perform the work of backfilling with the earth and sand as before, and the work is quick, and the sinking between the ground and the ground is not required. No problem such as

(10) By covering the sheet pile with a bag made of vinyl or the like, the sheet pile can be easily extracted and damage to the sheet pile and the ground pile can be minimized.

(11) A semi-underground parking lot can be constructed under a quick, simple and quiet working environment under the existing above-ground parking lot.

(12) The use of a special connector can completely prevent water from entering from the seam.

(13) Since the threaded block moves up and down along with the parking pedestal along the vertical frame completely fixed to the floor, it is possible to move the garage in and out of the garage without any backlash during the up-and-down operation.

(14) The spring water treatment is easily performed, and the humidity in the underground parking lot can be kept low.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a parking lot of the present invention.

FIG. 2 is a plan view of a parking platform.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an elevation view of a lifting device.

FIG. 5 is a plan view of a parking frame.

FIG. 6 is a top view of the lifting device.

FIG. 7 is a cross-sectional view of a parking lot.

FIG. 8 is a plan view of a fluttering prism.

FIG. 9 is a view showing a green cutting operation of a digging shoulder portion for digging a parking lot.

FIG. 10 is a perspective view showing a framework for installing a vertical frame.

FIG. 11 is a cross-sectional view of a part of an underground parking lot being created.

FIG. 12 is a plan view of a floor panel.

FIG. 13 is a view showing a side wall of an underground parking lot.

FIG. 14 is a view showing a special water sealing connector for connecting an underground side wall and a ground side wall.

FIG. 15 is a perspective view of a double L-shaped connecting device.

FIG. 16 is a diagram showing a modification of FIG.

FIG. 17 is a view showing a modification of FIG. 15;

FIG. 18 is a diagram showing a kamaba.

[Explanation of symbols]

10: multi-story parking lot, 12: vertical frame, 13: horizontal frame, 14, 16: parking stand, 18: spacer member, 2
0: lifting device, 22: plate, 24: frame, 26: longitudinal frame, 28: lateral frame, 30: guide rail, 36: threaded column, 38, 40: threaded block, 42: gear, 44: chain, 46: motor, 54: drain, 5
6: drainage pump, 58: open / close lid, 100: steel flap angle, 102: horizontal flap angle, 104: vertical flap angle, 10
6: sheet pile through hole, 108: groove, 110: cutter, 11
2: steel sheet pile, 114: mounting plate, 116: discarded base, 118: anchor rebar, 120: base concrete, 122: floor plate, 124: foam, 126: rising piece, 128: drain, 130: pump mounting Department, 13
2: Support hole, 134: Side wall plate, 136: Foam, 13
8: support, 140: concrete, 144: anchor, 146: side wall, 152: connector, 160: holder
162: Bracket, 200, 202, 204: Double L-shaped connector, 300: Kamaba.

Claims (4)

(57) [Claims] 1. A two-story multi-storey parking unit having a first-floor portion located underground and a second-floor portion located above the ground, wherein a floor plate, a side wall plate, and a lower end communicate with each other from the first floor portion to the second floor portion. At least four vertical frames fixed to the floor, a pair of parking spaces arranged at regular intervals, a threaded block fixed to each parking space, and screwed into these blocks. A threaded column extending vertically, a motor and a chain rotating these threaded columns,
The floor plate and the side wall plate of the underground portion are made of at least concrete, a foam material, and a rust-resistant hard plate material, and are provided with a pot yard provided with a spring water storage container at a lower portion of the base concrete.
Semi-underground multi-storey parking unit. 2. The semi-underground multistory parking lot unit according to claim 1, wherein the side wall plate of the underground portion and the side wall plate of the above ground portion are connected by a modified H-shaped fitting. 3. The semi-underground multi-storey parking unit according to claim 1, wherein the side wall plate and the floor plate are connected by a double L-shaped connector. 4. Cutting the ground with a cutter, scraping out earth and sand, digging a part of the floor further, stacking stone walls around it, shaping the flooring base surface, and using a flutter angle as needed. Plumbing, forming a kamaba in a stone wall, fixing at least four vertical frames to the floor by throwing away concrete base and base concrete, and flooring with a rustproof rigid plate material sprayed with foam on the back side Forming the surface, similarly forming the side wall surface with a rustproof hard plate material sprayed with foam on the back surface, driving the ready-mixed concrete between the sheet pile and the side wall surface, pulling up the sheet pile before the ready-mixed concrete solidifies A method of forming a semi-underground multi-story parking lot unit, comprising: mounting a parking pedestal and a lifting device on a floor surface; and forming side walls and a roof of a ground portion.