JPH072882Y2 - Pit for elevator car park formation - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to an elevating mechanism for constructing an ascending / descending multi-level parking lot that allows cars to be parked in a vertically stacked manner such as two or three steps. It relates to the structure of the pit that is the basis for installing the pit, and is characterized by making the pit construction extremely easy and rational.

(Prior Art) At present, the rate of increase in the number of automobiles possessed is increasing, and soaring land in urban areas is remarkable.
Therefore, there is a serious shortage of parking lots in urban areas, and it is impossible to meet the demand for parking even if the ordinary flat parking form is adopted.

At present, in order to solve such a problem, a multi-tiered elevator parking lot has been actively constructed so that automobiles can be vertically stacked and parked.

For example, as shown in FIG. 11, there is a structure in which an automobile can be parked in two stages vertically via a lifting device C. That is, in FIG. 11, in the state shown on the left side, the lower vehicle A can be taken in and out, and when the upper vehicle B leaves, the lifting device C is operated to operate the same. As shown on the right side of the figure, the upper vehicle is configured to be lowered.

(Problems to be Solved by the Invention) When constructing an elevator multi-story parking lot as shown in FIG. 9, it is necessary to form a pit P by excavating the ground in order to lower the lower vehicle A. Further, in order to form such pits P, it is necessary to strengthen the four peripheral wall surfaces and the bottom surface by concrete placing or the like for stabilization. Particularly, the bottom surface needs to be reinforced in consideration of the weight of the automobile.

However, in the past, since the formation of the pit P was configured such that the excavated surface was subjected to a reinforcement treatment by cast-in-place concrete, temporary construction of a concrete formwork or the like was required, and its construction was required. Was forced to be accompanied by significant complications.

The present invention is intended to solve such a conventional problem, and is characterized in that the construction of a pit for forming a three-dimensional lift parking lot can be remarkably easily and rationally achieved. It relates to a pit for forming a parking lot.

(Means for Solving Problems) The first elevating and lowering parking garage forming pit according to the present invention integrally comprises a bottom plate portion 1a and wall plate portions 1b.1c rising from two sides of the bottom plate portion 1a at right angles. The corner blocks 1 that are precast products that are continuously connected are installed at the four corners of the pit P, and the U-shaped drain groove 2 that is a precast product is installed in the center of the pit P. Corner block 1
Are connected by the cast-in-place concrete 3 having a required width, and the overall width L of the pit P is set according to the cast width of the cast-in-place concrete 3.

Then, the connection between the corner block 1 and the U-shaped drainage groove 2 is performed by connecting the reinforcing bar 1d for reinforcement of the corner block 1 with
It is desirable to connect the reinforcing steel bar 2a of the drainage channel 2 to the reinforcing steel bar 3a of the cast-in-place portion and cover the connected portion with the cast-in-place concrete 3.

The second elevating and lowering parking garage forming pit according to the present invention integrally connects a bottom plate part 4a and wall plate parts 4b.4c rising from two sides of the bottom plate part 4a at right angles, and further A corner block 4 which is a precast product formed by forming a joint concrete placing groove 4e on the inner surface side by providing a butt guide piece 4d on the outer surface side of the edge of the plate sections 4b.4c.
Are installed at the four corners of the pit P, and the bottom plate portion 5a and the bottom plate portion 5a
The wall plate portion 5b that rises at a right angle from the wall plate portion 5b is integrally connected, and further, on the outer surface side of both end edges of the wall plate portion 5b, by providing the abutting guide piece portions 5c.5d, its inner surface side The L-shaped block 5, which is a precast product formed by forming joint concrete pouring grooves 5e.5f on the corner block 4,
U-shaped drain groove 6 which is a precast product.
Is installed in the central part of the pit P, connected to the L-shaped block 5, and the wall plate parts 4b.4c in the corner block 4 are installed.
The matching guide piece 4d provided in the L-shaped block 5 and the matching guide piece 5c provided in the wall plate portion 5b of the L-shaped block 5 are connected to each other in the grooves 4e and 5e. 1 joint concrete 7 is placed and the L-shaped block 5
A guide piece 5d for abutment provided on the wall plate portion 5b in
While abutting against the upper edge of the side wall of the U-shaped drain groove 6,
The second joint concrete 8 is formed in the groove 5f of the L-shaped block 5.

The corner block 4 and the L-shaped block 5 are connected via the first joint concrete 7 described above, the reinforcing bar 4f for the corner block 4 and the reinforcing bar 5g for the L-shaped block 5 are connected to each other by the reinforcing bar 7a. And connecting the L-shaped block 5 and the U-shaped drainage groove 6 via the second joint concrete 8 as described above. Reinforcing bar 5g for reinforcing the mold block 5 and reinforcing bar 6a for the U-shaped drain groove 6
It is preferable that the second joint concrete 8 is connected to the second joint concrete 8a through the joint 8a.

The third ascent / descent parking garage forming pit according to the present invention integrally connects the bottom plate portion 10a and the wall plate portions 10b.10c rising from two sides of the bottom plate portion 10a at right angles, and the wall concerned. By providing the guide piece 10d for abutment on the outer surface side of the edge of the plate portion 10b.10c, the corner block 10 which is a precast product formed by forming a joint concrete placing groove 10e on the inner surface side thereof is pitted. Installed at the corner of P, bottom plate 11a
And a wall plate portion 11b standing upright at a right angle from the bottom plate portion 11a are integrally connected to each other, and a butt guide piece portion 11c is provided on the outer surface side of the edge of the wall plate portion 11b, whereby an inner surface thereof is formed. A precast product for connecting the L-shaped block 11 which is a precast product formed by forming a joint concrete placing groove 11d on the side to the corner block 10 and standing up in the inner center of the pit P. Bulkhead block 13
Are sandwiched between the above L-shaped blocks 11 so as to be supported and fixed, and the abutting guide piece portion 10d provided on the wall plate portions 10b and 10c of the corner block 10,
The first joint concrete 12 is placed in each groove 10e and groove 11d which are matched by connecting the abutting guide piece portions 11c provided on the wall plate portion 11b in the L-shaped block 11, and further, L A second joint concrete 14 is placed between the mold block 11 and the fire barrier wall block 13.

Then, the connection between the corner block 10 and the L-shaped block 11 through the above-mentioned first joint concrete 12, the reinforcing rebar 10f of the corner block 10 and the reinforcing rebar 11e of the L-shaped block 11, While connecting with 12a, the first joint concrete 12 is placed in the connecting portion, and further,
The connection between the fireproof bulkhead block 13 and the L-shaped block 11 through the second joint concrete 14 described above is performed by the L-shaped block.
The reinforcing rebars 11e drawn out from the bottom surface of 11 and the reinforcing rebars 13a of the bulkhead block 13 are connected by the reinforcing rebars 14a, and the second joint concrete 14 is placed at the connecting portions. Is desirable.

(Operation) The above-described first elevating multi-story parking pit forming pit of the present invention comprises a corner block 1 which is a precast product and a U-shaped drainage groove 2 which is a precast product, and a cast-in-place concrete 3 having a required width. The pit P is formed by connecting the pits with each other. Then, the overall width of the pit to be constructed is adjusted by the casting width of the cast-in-place concrete 3.

In the constructed pit P, as shown in FIG. 11, an elevator car parking lot is formed by installing an existing elevator C.

In this case, due to the presence of the U-shaped drainage groove 2, the drainage action in the pit P is achieved.

The above-described second pit for forming the elevated three-dimensional parking lot of the present invention is a corner block 4 which is a precast product.
The L-shaped block 5 and the U-shaped drainage groove 6 form a pit P, and the first and second joint concrete 7 is formed on site.
The pit P can be completed only by placing 8 and 8.

The above-mentioned pits for forming the third ascending / descending three-dimensional parking lot of the present invention are the corner blocks 10 which are precast products.
The L-shaped block 11 and the fire protection partition block 13 form a pit P, and the pit P can be completed on site only by placing the first and second joint concretes 12 and 14.

Based on the presence of the fire protection partition block 13, the pits P each having two parking spaces in the left-right direction are divided into units, and the spread of fire in the event of a fire is prevented.

(Embodiment) The construction of the present invention will be described in detail with reference to an embodiment shown in the drawings.

1 and 2 show a first embodiment of the present invention, in which 1 is a corner block which is a precast product to be installed in the corner portion of the pit P. That is, the bottom plate portion 1a and the wall plate portions 1b.1c rising from two sides of the bottom plate portion 1a at right angles are integrally connected.

Reference numeral 2 is a U-shaped drainage groove which is a precast product, and is to be installed in the central portion of the pit P. The drainage groove 2 and the corner block 1 are connected by a cast-in-place concrete 3 as shown in FIG.
Further, the overall width L of the pit P is set according to the casting width of the cast-in-place concrete 3.

Further, the drainage groove 2 and the corner block 1 are connected through the above-mentioned cast-in-place concrete 3, which is a reinforcing bar 1d for the corner block 1 and a reinforcing bar 2a for the U-shaped drainage groove 2. Are connected via reinforcing steel bars 3a of the cast-in-place portion, and the cast-in-place concrete 3 is formed in this state.

3 to 6 show a second embodiment of the present invention, in which 4 is a corner block which is a precast product to be installed in the corner portion of the pit P. Thus, the bottom plate portion 4a and the wall plate portions 4b.4c rising from the two sides of the bottom plate portion 4a at right angles are integrally connected. Further, a joint guide piece portion 4d is provided on the outer surface side of the edge of the wall plate portions 4b and 4c, whereby a joint concrete pouring groove 4e is formed on the inner surface side thereof.

Reference numeral 5 is an L-shaped block which is a precast product, and is formed by integrally connecting a bottom plate portion 5a and a wall plate portion 5b standing upright from the bottom plate portion 5a. Then, on the outer surface side of both end edges of the wall plate portion 5b, the guide piece portions 5c.
Due to the provision of the joints, the joint concrete placing grooves 5e and 5f are formed on the inner surface side thereof. 6 is a U-shaped drainage groove which is a precast product, and is to be installed in the central portion of the pit P.

Numeral 7 is the first joint concrete, which is used for the abutment guide piece 4d provided on the wall plates 4b.4c of the corner block 4 and the abutment provided on the wall plate 5b of the L-shaped block 5. The grooves are formed in the respective grooves 4e and 5e that are matched by connecting the guide piece portions 5c.

Reference numeral 8 is a second joint concrete, which is a butt guide piece 5d provided on the wall plate portion 5b of the L-shaped block 5.
And the upper edge of the U-shaped drain groove 6 near the upper edge of the side wall are abutted with each other, and the L-shaped block 5 is driven in the groove 5f.

Further, the corner block 4 and the L-shaped block 5 are connected through the first joint concrete 7 described above. As shown in FIG. 5, this is the reinforcing bar 4f for the corner block 4 and the L-shaped block. The reinforcing steel bar 5g of No. 5 is connected to the reinforcing steel bar 7a of the first joint concrete, and the first joint concrete 7 is formed in this state.

Further, the connection between the L-shaped block 5 and the U-shaped drainage groove 6 via the second joint concrete 8 described above is performed, as shown in FIG. ,
The reinforcing reinforcing bar 6a of the U-shaped drainage groove 6 is connected to the reinforcing reinforcing bar 8a of the second joint concrete 8 to form the second joint concrete 8 in this state.

7 to 8 show a third embodiment of the present invention. In the figure, 10 is a corner block which is a precast product to be installed in a corner portion of the pit P, and includes a bottom plate portion 10a and a wall plate portion 10b which rises from two sides of the bottom plate portion 10a at right angles. 10c and 10c are integrally connected.

Further, a joint concrete placing groove 10e is formed on the inner surface side of the wall plate portions 10b, 10c by providing the abutting guide piece portion 10d on the outer surface side of the edge.

Reference numeral 11 denotes an L-shaped block that is a precast product, and includes a bottom plate portion 11a and a wall plate portion 11 that stands upright from the bottom plate portion 11a.
It is formed by integrally connecting with b. Then, on the outer surface side of the end edge of the wall plate portion 11b, the butting guide piece portion 11c is formed.
Due to the provision of the groove, a joint concrete placing groove 11d is formed on the inner surface side thereof.

Reference numeral 12 is the first joint concrete, and the guide piece 10d for abutment provided on the wall plate portions 10b and 10c of the corner block 10 and the abutment provided on the wall plate portion 11b of the L-shaped block 11 The groove is formed in each groove 10e and groove 11d that are matched by connecting the guide piece portion 11c.

Further, the connection between the corner block 10 and the L-shaped block 11 through the above-mentioned first joint concrete 12 is, as shown in FIG. 9, this is the reinforcement reinforcing bar 10f of the corner block 10 and the L-shaped block. The reinforcing steel bars 11e of 11 are connected to the reinforcing steel bars 12a of the first joint concrete 12, and the first joint concrete 12 is formed in this state.

Numeral 13 is a fireproof bulkhead block to be erected at the center of the inside of the pit P. The pit P having a parking space for two cars in the left-right direction is divided into parts for each car, and the pit P is accordingly divided. The inside of each parking space is independent to prevent the spread of fire in the event of a fire.

The above-mentioned fire-proof partition block 13 is sandwiched between the L-shaped blocks 11 to support and fix it. As shown in FIG. 10, this is for reinforcement to be pulled out from the bottom of the L-shaped blocks 11. Reinforcing bar 11e and reinforcing bar 13a for bulkhead block 13 are connected to reinforcing bar 14a for second joint concrete 14
And the second joint concrete 14 is placed.

(Effects of the Invention) As described in claim (1), the first elevating three-dimensional parking lot forming pit according to the present invention has a bottom plate portion 1a and the bottom plate portion 1a.
Corner block 1 which is a precast product made by integrally arranging wall plate parts 1b.1c standing up from two right angles of
Are installed at the four corners of the pit P, a U-shaped drainage groove 2 is installed at the center of the pit P, and the drainage groove 2 and the corner block 1 are formed by a cast-in-place concrete 3 having a required width. And the total length L of the pit P is set according to the casting width of the cast-in-place concrete 3.

Then, based on the adoption of such a configuration, that is, the corner block 1 which is a precast product and the U-shaped drainage groove 2 which is a precast product are connected by the cast-in-place concrete 3 having a required width. Since the pit P is formed according to the above, the construction work can be remarkably facilitated and speeded up as compared with the case where the pit is constructed based on the method existing in all in-situ concrete as in the past. It will be.

Further, based on the adoption of the configuration as set forth in claim (2), it is possible to strengthen the entire pit.

Next, the second elevating and lowering parking garage forming pit according to the present invention has a bottom plate portion 4a and a wall plate portion 4b rising from two sides of the bottom plate portion 4a at right angles as described in claim (3). .4c are integrally connected to each other, and further, by providing the abutting guide piece 4b on the outer surface side of the edge of the wall plate section 4b.4c, a groove for joint concrete pouring is formed on the inner surface side. Corner block 4 which is a precast product formed by forming 4e
Installed at the four corners of the bottom plate portion 5a and the wall plate portion 5b rising at a right angle from the bottom plate portion 5a are integrally connected to each other. Guide piece 5c, 5d
L is a precast product in which the joint concrete placing grooves 5e.5f are formed on the inner surface side by providing the L
The mold block 5 is connected to the corner block 4, and the U-shaped drain groove 6 which is a precast product is connected to the L-shaped block 5 and is installed in the central portion of the pit P. Guide piece 4d for abutment provided on the wall plate portions 4b.4c and the wall plate portion of the L-shaped block 5
The first joint concrete 7 is placed in each groove 4e and the groove 5e which are matched by connecting the abutting guide piece 5c provided in 5b, and the wall plate portion in the L-shaped block 5 is further placed. Guide piece 5d for butting provided on 5b and U-shaped drain groove 6
The second joint concrete 8 is placed in the groove 5f of the L-shaped block 5 while being abutted with the upper edge of the side wall.

Then, based on the adoption of such a structure, that is, the corner block 4, which is a precast product, the L-shaped block 5, and the U-shaped drainage groove 6, respectively, are cast into the first and second joint concretes 7 and 8. By connecting by
Since it is configured to form the pit P, the construction work can be remarkably facilitated and speeded up as compared with the case where the pit is constructed based on the conventional method that depends entirely on cast-in-place concrete. Become.

Further, based on the adoption of the configuration as set forth in claim (4), the strengthening property of the entire pit can be achieved.

Further, the third ascending / descending parking garage forming pit according to the present invention is, as described in claim (5), a bottom plate portion 10a and a wall plate portion 10b which rises from two sides of the bottom plate portion 10a at right angles. 10c is integrally connected to the wall plate portion 10b.By forming a butt guide piece 10d on the outer surface side of the edge of the wall plate portion 10b.10c, a joint concrete placing groove 10e is formed on the inner surface side. Corner block 10 which is a precast product consisting of
Is installed at a corner portion of the pit P, and the bottom plate portion 11a and the wall plate portion 11b standing upright at a right angle from the bottom plate portion 11a are integrally connected to each other, and on the outer side of the end edge of the wall plate portion 11b. The L-shaped block 11 which is a precast product formed by forming the joint concrete casting groove 11d on the inner surface side of the corner block 10 by providing the butt guide piece 11c.
And a fire-prevention bulkhead block 13 which is a precast product for standing upright in the inner center of the pit P so as to be supported and fixed by being sandwiched between the above-mentioned L-shaped blocks 11 and the corner block. Wall plate part 10 in 10
b. The guide piece 10d for abutment provided on 10c and the guide piece 1 for abutment provided on the wall plate portion 11b of the L-shaped block 11.
Grooves 10e and 11d are matched by connecting with 1c.
A first joint concrete 12 is placed therein, and a second joint concrete 14 is placed between the L-shaped block 11 and the fire-proof partition block 13.

Then, adopting such a structure, that is, the corner block 10 and the L-shaped block, which are precast products, respectively.
The pit P is composed of 11 and the fireproof bulkhead block 13, and the first and second joint concretes 12 and 14 are on-site.
Since the pit P can be completed only by placing the pits, the construction work can be made significantly easier and quicker than the case where the pits were constructed based on the conventional method that relies entirely on cast-in-place concrete. Will be planned.

Then, based on the existence of the fire protection bulkhead block 13, the pits P having the parking spaces for two vehicles in the left-right direction are sectioned one by one, and therefore, in the event of a fire, etc. Therefore, the spread of fire to the next car is well prevented.

Further, based on the adoption of the configuration as set forth in claim (6), the strengthening property of the entire pit can be achieved.

[Brief description of drawings]

1 and 2 are views showing a first pit for forming a three-dimensional lift parking lot according to the present invention, in which FIG. 1 is a plan view,
FIG. 2 is an edge view taken along line XX in FIG. 1, and FIGS. 3 to 6 show a second pit for forming an elevated three-dimensional parking lot according to the present invention. Figure is plan view, Figure 4 is third
Fig. 5 is an end view of the Y-Y line in the figure, and Fig. 5 is M in Fig. 4.
FIG. 6 is an enlarged sectional view of a portion, and FIG.
7 to 10 are views showing a third pit for forming a three-dimensional lift parking lot according to the present invention, and FIG. 7 is a plan view,
FIG. 8 is an end view of the line ZZ in FIG. 7, and FIG.
FIG. 10 is an enlarged sectional view of the Q portion in the figure, FIG. 10 is an enlarged sectional view of the R portion of the same as above, and FIG. 1 ... Corner block, 1a ... Bottom plate part 1b.1c ... Wall plate part, 1d ... Reinforcing bar 2 ... U-shaped drainage groove, 2a ... Reinforcing bar P ... Pit 3 ... Cast-in-place concrete 3a ... Reinforcing bar 4 ... Corner Block, 4a ... Bottom plate 4b.4c ... Wall plate 4d ... Butt guide piece 4e ... Joint concrete placing groove 4f ... Reinforcing bar 5 ... L-shaped block, 5a ... Bottom plate 5b ... Wall plate 5c , 5d… Guiding piece 5e, 5f… Joint concrete pouring groove 5g… Reinforcing bar, 6… U-shaped drainage groove 6a… Reinforcing bar 7… First joint concrete 7a… Reinforcing bar 8… No. 2 joint concrete 8a ... Reinforcing steel bar 10 ... Corner block, 10a ... Bottom plate 10b, 10c ... Wall plate 10d ... Guiding guide piece 10e ... Joint concrete pouring groove 10f ... Reinforcing bar 11 ... L-shaped block , 11a ... Bottom plate 11b ... Wall plate 11c ... Butt guide piece 11d ... Joint concrete pouring Grooves 11e ... Reinforcing steel bars 12 ... First joint concrete 12a ... Reinforcing steel bars 13 ... Fireproof bulkhead blocks, 13a ... Reinforcing steel bars 14 ... Second joint concrete 14a ... Reinforcing steel bars

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Koji Matsumoto, 3-4-4 Minamiosawa, Hachioji, Tokyo 904 (56) References JP, U)

Claims (6)

[Scope of utility model registration request] 1. A corner block 1 which is a precast product formed by integrally connecting a bottom plate portion 1a and wall plate portions 1b.1c rising from two sides of the bottom plate portion 1a at right angles to four corners of a pit P. A U-shaped drainage groove 2 which is a precast product is installed in the center of the pit P, and the drainage groove 2 and the corner block 1 are connected by a cast-in-place concrete 3 having a required width. A pit for forming an elevated three-dimensional parking lot, characterized in that the entire length width L of the pit P is set according to the casting width of the cast-in-place concrete 3. 2. The connection between the corner block 1 and the U-shaped drainage groove 2, the reinforcing bar 1d for the corner block 1 and the reinforcing bar 2a for the drainage groove 2, and the reinforcing bar 3a for in-situ casting.
The pit for forming an elevator multi-story car park according to claim 1, wherein the pit is connected to the pit for forming an elevating multi-story parking lot, and the connection portion is covered by the cast-in-place concrete 3. 3. A bottom plate part 4a and a wall plate part 4b.4c rising from two right sides of the bottom plate part 4a are integrally connected to each other, and further on the outer side of the edge of the wall plate part 4b.4c. The corner blocks 4 which are precast products in which the joint concrete guide portions 4d are provided to form the joint concrete pouring grooves 4e on the inner surface side thereof are installed at the four corners of the pit P to form the bottom plate portion.
5a and a wall plate portion 5b standing upright at a right angle from the bottom plate portion 5a are integrally connected, and further, guide end portions 5c, 5d for abutment are provided on the outer surfaces of both end edges of the wall plate portion 5b. Depending on
The L-shaped block 5 which is a precast product formed by forming the joint concrete pouring grooves 5e and 5f on the inner surface side thereof is connected to the corner block 4, and the U-shaped drain groove 6 which is a precast product is connected to the L-shaped block. A guide guide piece 4d for abutment, which is installed in the central portion of the pit P so as to be continuous with the mold block 5 and provided on the wall plate portions 4b and 4c of the corner block 4,
Each groove 4e that is matched by connecting with the abutting guide piece 5c provided on the wall plate 5b in the L-shaped block 5
The first joint concrete 7 is placed in the groove 5e, and the abutting guide piece 5d provided on the wall plate 5b of the L-shaped block 5 and the upper edge of the side wall of the U-shaped drain groove 6 near the edge. And a second joint concrete 8 is placed in the groove 5f of the L-shaped block 5, and the pit for forming an elevated three-dimensional parking lot. 4. The connection between the corner block 4 and the L-shaped block 5 via the first joint concrete 7 is made by reinforcing the reinforcing bar 4f of the corner block 4 and the reinforcing bar of the L-shaped block 5.
5g is connected via reinforcing steel bars 7a, and the first joint concrete 7 is covered on the connecting portion, and the L-shaped block 5 is formed via the second joint concrete 8 described above.
And the U-shaped drain groove 6 are connected to each other by connecting the reinforcing bar 5g of the L-shaped block 5 and the reinforcing bar 6a of the U-shaped drain groove 6 to the reinforcing bar.
The elevating multistory parking pit forming pit according to claim (3), wherein the pits are connected via 8a and the second joint concrete 8 is provided so as to cover the connecting portion. 5. The bottom plate portion 10a and the wall plate portions 10b.10c rising from two right sides of the bottom plate portion 10a are integrally connected to each other, and the bottom plate portion 10b and the wall plate portions 10b.10c are provided on the outer side of the edge. A corner block 10 which is a precast product is formed by forming a joint concrete placing groove 10e on the inner surface side by providing a butt guide piece 10d, and the corner block 10 of the pit P is installed. 11a and a wall plate portion 11b standing upright at a right angle from the bottom plate portion 11a are integrally connected to each other, and the wall plate portion 11b is also connected.
An L-shaped block 11 which is a precast product formed by forming a joint concrete casting groove 11d on the inner surface side by providing a butt guide piece 11c on the outer surface side of the edge of
Is connected to the corner block 10, and a fire barrier wall block 13 which is a precast product for standing upright in the inner center of the pit P is sandwiched between the L-shaped blocks 11 so as to be supported and fixed. Also, the abutting guide piece 10d provided on the wall plate portions 10b and 10c of the corner block 10 and the abutting guide piece portion 11c provided on the wall plate portion 11b of the L-shaped block 11 are connected. Therefore, the first joint concrete 12 is placed in each groove 10e and the groove 11d which are matched with each other, and the second joint concrete 14 is placed between the L-shaped block 11 and the fire protection bulkhead block 13. A pit for forming a three-dimensional lift parking lot, which is configured to be installed. 6. The connection between the corner block 10 and the L-shaped block 11 through the first joint concrete 12, the reinforcing bar 10f for reinforcing the corner block 10 and the reinforcing bar 11e for reinforcing the L-shaped block 11 for reinforcing While connecting with the reinforcing bar 12a, the first joint concrete 12 is placed in the connecting portion, and further, the connection between the fireproof bulkhead block 13 and the L-shaped block 11 via the above second joint concrete 14, Reinforcing rebars 11e drawn out from the bottom surface of the L-shaped block 11 and reinforcing rebars 13a of the partition block 13 are connected by the reinforcing rebars 14a, and the second joint concrete 14 is placed at the connecting portions. The ascent / descent parking garage forming pit according to claim 5, wherein the pit is provided.