JPH0477110B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of constructing an underground multi-level parking garage, which is constructed mainly in a place where it is difficult to secure a parking space above ground.

[Problem to be solved by the invention]

For example, although parking is now essential for office buildings and commercial buildings built in urban areas, these buildings are usually constructed on cramped lots, making it difficult to secure sufficient parking space. The reality is that it is difficult.

Traditionally, you have to choose between an underground parking lot or a multi-storey parking lot, but both hinder the effective use of limited land for buildings and result in the reduction of floor space for parking lots. .

This invention was made based on this background, and aims to propose a new parking lot that realizes effective use of land.

[Means to solve the problem]

The present invention eliminates the impact on the floor area of above-ground buildings by installing a multi-storey parking lot underground with vertical circulation, realizing effective use of land.At the same time, by constructing it with cylindrical concrete walls, The structure is designed to bear pressure and water pressure mainly as compressive stress in the circumferential direction, and the wall thickness is reduced, which means lower construction costs.

For underground multi-level parking garages, earth anchors are buried at a depth deeper than the base construction depth, and after removing the waste concrete that forms the cylindrical concrete wall, the soil within that area is buried to a depth that will not collapse. The ground is excavated and a cutting edge is formed at the tip of the concrete wall. At the same time, a prestressed steel anchorage is formed in the shape of a brim on the inner periphery of the concrete wall, and then the concrete wall is constructed to a certain height.
It is constructed by pulling the prestressing steel material with jacks to lower the cutting edge to a certain depth, then repeating the process of excavating the inside of the cutting edge, and finally creating a base.

〔Example〕

The present invention will be explained below based on the drawings showing one embodiment.

The underground multi-level parking lot A of this invention is constructed below a building on the ground as shown in FIG. 1-I, and parking is carried out in a vertical circulation manner.

As shown in the figure, the underground multi-level parking lot A is composed of a bottom plate 1 formed below and a cylindrical concrete wall body 2, and has a bottom area that can accommodate at least two cars in parallel.

Cars are installed within the concrete wall 2, similar to the multi-story parking lot above ground, and are parked on pallets that circulate like a Ferris wheel.

Figure 1- is a plan view of the above-ground building, and as shown by the broken line, this underground parking lot A can be used as a pile foundation for the building, and the cylindrical concrete wall 2 is , the wall thickness can be thinner than in the case of a rectangular shape, since the water pressure is largely borne in the form of circumferential stress.

Fig. 2 shows a concrete wall 2 formed in an oval cross-sectional shape, and an underground multi-level parking lot A of the embodiment shown in Fig. 1.
This shows an example in which two units are connected.

In this case, the inside of the concrete wall 2 is placed in the central part.
A partition wall 3 is provided to partition the space, and this partition wall 3 is also used as a stake as shown.

The construction procedure will be explained with reference to FIG.

First, underground obstacles are removed and concrete 5 is placed on leveled ground to determine the installation location of the earth anchor 4 (I).

From above this waste concrete 5, pre-boring is performed according to the ground, and the earth anchor 4 containing the prestressing steel material 6 is driven to a position deeper than the construction depth of the base plate 1 ().

After driving all the earth anchors 4, remove the waste concrete 5 in the area that will form the cylindrical concrete wall, excavate the ground in this area to a depth (approximately 1 to 1.5 m) that will not collapse the soil, and then remove the concrete. A cutting edge 7 is formed at the tip of the wall 2 (). At the same time, a collar-shaped anchoring portion of the PC steel material 6 is formed on the inner peripheral side of the cutting edge 7 ().

Now, assemble the formwork 8 around the upper end of the cutting edge 7,
While constructing a concrete wall 2 of a certain height by arranging reinforcement and pouring concrete (), the ground on the inner circumferential side of the cutting edge 7 is excavated ().

After excavation, a jack 9 is installed at the anchoring part of the PC steel material 6, and the blade mouth 7 is sunk by a certain amount by pulling the PC steel material 6 with the jack 9, and after sinking, the extra length of the upper end of the PC steel material 6 is cut off. ().

Continue to repeat the steps ~ above (),
When the cutting edge 7, that is, the concrete wall 2 has been sunk to a predetermined depth, the jack 9 is removed.
The upper end of the PC steel material 6 is fixed, concrete is poured on the inner circumferential side of the cutting edge 7 to create the base 1, and the underground multi-level parking lot A is constructed ().

The earth anchor 4 buried below the bottom plate 1 is buried as it is, and serves to prevent the underground multi-level parking lot A and above-ground buildings from floating or falling due to groundwater.

〔Effect of the invention〕

This invention is as described above, and since it is constructed vertically in the basement of a building, it is possible to secure a parking space with a large capacity without interfering with the utilization of the building site, and it is also possible to secure a parking space with a large capacity without hindering the use of the building site. Since it is thin, it can be realized at low cost.

[Brief explanation of the drawing]

Figure 1-, is a perspective view and plan view showing an example of construction of an underground multi-story parking garage, Figure 2- is a perspective view and plan view showing another example, respectively, and Figures 3-- are construction. It is a schematic diagram showing a procedure. A...Underground multi-storey parking lot, 1...Bottom plate, 2...Concrete wall, 3...Partition wall, 4...Earth anchor, 5...Discarded concrete, 6...PC steel material,
7...Blade mouth, 8...Formwork, 9...Jatsuki.

Claims (1)

[Claims] 1. Earth anchors containing prestressed steel are buried vertically below the perimeter of the disposable concrete cast in a disk shape on the ground, below the base construction depth of a designated underground multi-storey parking lot, and a cylindrical concrete wall is constructed. After removing the waste concrete in the area that forms the area, excavate the ground to a depth that will not collapse the soil in that area, form a cutting edge at the tip of the concrete wall, and at the same time attach the PC steel anchorage to the concrete wall. A brim-like shape is formed on the inner circumference of the body, and a cylindrical concrete wall is built at a certain height above the cutting edge.The PC steel is pulled by a jack installed at the PC steel fixing part, and the cutting edge is held constant. From the process of alternately repeating the procedure of sinking only the depth, allowing the cutting edge to sink to a predetermined depth, constructing a concrete wall, and then pouring concrete around the inner circumference of the cutting edge to create a base. How to build an underground multi-storey parking lot.