JPS6233372B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for creating a stepped residential lot on a slope. Conventionally, when developing residential land on sloped land,
As shown in Figure 1, an L-shaped concrete retaining wall 1 is being constructed.In order to construct this retaining wall 1, the required retaining wall 2 is temporarily constructed by placing sheet piles, etc., and as needed. After supporting this with earth anchors 3, the floor is excavated, a large number of foundation piles 4 are driven, and the retaining wall 1 is constructed on top of it, and then the excavation is backfilled. There is. For this reason, a relatively large floor area is required, and a large amount of excavated soil is required.It is necessary to use heavy machinery to carry it out and carry it in (backfilling), which is time-consuming. However, it is difficult to compact the ground to the same degree as the ground, and in addition, there is a lot of slope excavation and the height is high, so sufficient consideration must be taken to prevent the ground from collapsing. There were various disadvantages such as having to use neighboring land for temporary storage of returned soil.

The purpose of the present invention is to eliminate such drawbacks and to leave a large area of ground as the ground for a building. After constructing retaining walls at a predetermined interval on both sides and erecting appropriate shoring between the piles of the retaining walls and the above-mentioned main piles, underground beams and walls are installed between the above-mentioned main piles. This relates to a construction method for building land on a slope, which is characterized by forming an underground retaining wall and performing the necessary cutting and embankment work.

This will be explained in detail below with reference to the illustrated embodiment.

Reference numeral 5 indicates parent piles that are arranged in a free-standing row at required intervals on the planned line for constructing an underground retaining wall.The parent piles 5 are inserted into holes 6 that have been excavated to a predetermined depth underground, and concrete 7 is poured into their foundations. The main pile may be made of I-beams, steel pipes, etc. in addition to the H-beams shown in the figure.

Reference numerals 8 and 8' refer to retaining walls constructed at a required interval on both sides of the main piles 5 arranged in a row. After installing the piles 9, 9' in a row, while digging backwards downward between the main pile 5 and the retaining piles 9, 9', add support between the opposing parent pile and the retaining piles 9, 9'. Engineering 10,1
0', and wall materials 11 and 11' between each of the retaining piles 9 and between each of the retaining piles 9 and 9', respectively, in a downward direction. ' has a height that reaches at least from the sloping ground surface to a position facing the upper end of the concrete foundation of the parent pile 5.

In the above, in addition to the H-beams shown in the figure, I-beams, square pipes, steel pipes, etc. are used as the retaining piles, and in addition to the shown jacks, braces, cut beams, etc. are used as supporting materials, and wall materials are also used. In addition to the pine pile sheets shown in the figure, pipes with the required cross-sectional shape, H-beam steel, and C
Shaped steel or the like may also be used.

Next, between the parent piles 5, beam reinforcing bars 12 are arranged directly above the concrete foundation, and above them, wall reinforcing bars 13 are arranged, and the outside of these bars is placed in a predetermined formwork. After enclosing it, concrete is placed there to form underground beams 14 and walls 15, thereby constructing an underground retaining wall 16.

Next, after a predetermined curing period, the formwork and retaining walls 8, 8' are dismantled and removed, and backfilling work 1
7. Rear backfilling 18, cutting 19, embankment 20
construction to complete the development of the residential land.

In addition, 21 in FIGS. 4 and 5 is a frame removably fixed to the main pile 5, on which a jack is placed as shown. Reference numeral 22 in FIGS. 3 and 5 is a drain pipe penetrated through the wall 15.

Figures 7A and 7B show other examples in which pipes with the desired cross-sectional shape are used as the wall material constituting the retaining wall.
In A, the end of the circular pipe 24 is inserted into the H-beam 23 of the pile and is locked with a stopper 25. In B, a square pipe 26 is used as the pile. The ends of the circular pipes 27 are inserted into the receiving ports 26' arranged in the vertical direction, and are locked with the stoppers 28.

As detailed above, according to the present invention, since the floor area is small, and therefore the excavated area and soil volume are also small, a small machine is sufficient for carrying out and carrying in (backfilling) the excavated soil, and in particular, Since most of the ground can be left intact, a stronger housing ground can be created compared to conventional backfilling and compaction. Also, because there is little excavation on the slope, there is less risk of collapse. moreover,
As mentioned above, the retaining wall can be supported using the parent piles, making it possible to start construction at the same time on all blocks that are adjacent to each other vertically and horizontally in a stair-like manner, and to perform redundant work, significantly shortening the construction period compared to conventional methods. It is possible to do so. Furthermore, there is no need to provide support for the retaining wall on adjacent land, and since there is little backfilling soil, there is no need to temporarily deposit it on adjacent land, etc., and the impact on adjacent land can be minimized.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the conventional residential land preparation method, Figures 2 to 6 show examples of the housing land preparation method according to the present invention, and Figure 2 is a schematic plan view of a state in which a retaining wall has been constructed; Figure 3 A and B are a schematic plan view and cross-sectional view of the underground retaining wall constructed, Figures 4 and 5 are cross-sectional views and plan views of the underground retaining wall construction status, and Figure 6 is an underground retaining wall. Fig. 7A and Fig. 7B are cross-sectional views of main parts showing other examples of retaining walls. 5... Main pile, 8, 8'... Mounting wall, 10, 10'...
Shoring, 14... Underground beam, 15... Wall, 16... Underground retaining wall.

Claims (1)

[Claims] 1. Install parent piles in a self-supporting row at a predetermined interval on a slope, and construct retaining walls at a prescribed interval on both sides of the row of parent piles, and make sure that the stakes in the retaining wall and the above-mentioned parent piles are connected to each other. A residential land on a slope where, after erecting appropriate shoring between the main piles, underground beams and walls are formed between the above-mentioned parent piles, and necessary cutting and embankment work is performed to form an underground retaining wall. Construction method.