JPS59233028A - Residential land formation work on sloped ground - Google Patents

Abstract

PURPOSE:To form a strong residential ground by a method in which sheathing walls are constructed on both sides of master piles driven at given intervals, a timbering work is provided between the piles of sheathing walls and the master piles, and underground beams and walls are formed between the master piles, followed by cutting and banking works. CONSTITUTION:Master piles 5 are penetrated into pits 6 provided at given intervals, and sheathing walls 8 and 8' are constructed at a given interval on both sides of the master piles 5. Timbering works 10 and 10' are provided between the piles 9 and 9' of the sheathing walls 8 and 8' and the master piles 5, and underground beams 14 and walls are formed between the master piles 5 to construct an underground retaining wall 16, followed by embedding work, back-filling work 18, cutting work 19, and banking work 20. Since the amount of area to be excavated and also of soil to be excavated is small, the construction work can be attained by small-size working machine. Also, since the majority of the natural ground can be left behind, strong residential ground can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for creating a stepped residential lot on a slope. Conventionally, in residential development KFi on sloped land, as shown in Figure 1, an L-shaped concrete retaining wall 1 is constructed, but in order to construct this retaining wall m1, the required retaining wall m2 is required by placing sheet piles, etc. After constructing a temporary structure and supporting it with earth anchors 3 as necessary, the flooring will be excavated and
A large number of foundation piles 4 are driven, the tAf wall 1 is constructed thereon, and the excavation is then backfilled. For this reason, a relatively wide floor requires a large area and requires a large amount of excavation, and the removal and loading (g.

It is time-consuming and requires the use of heavy machinery for backfilling (backfilling), and it is difficult to compact the ground to the same level as the ground through compaction during backfilling.In addition, there is a lot of slope excavation and the height is high. Therefore, sufficient consideration had to be taken to prevent the ground from collapsing, and there were disadvantages in that they were forced to use nearby land for shoring of the stopping wall, temporary storage of backfilling soil, etc. .

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

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

Reference numeral 5 denotes parent piles that are arranged in a self-supporting row at required intervals on the underground retaining wall construction plan. It was driven and made to stand on its own, and was used as a parent pile with I″ii diagram-shaped (
It may also be made of hollow shaped steel, steel pipes, etc.

Reference numeral 8.8' denotes a pile retaining wall built at a required interval on both sides of the main piles 5 arranged in a row. After installing the retaining piles 9 and 9' in a row, while digging backwards downward between the main pile 5 and the retaining piles 9 and 9', dig between the opposing parent pile and the retaining piles 9 and 9'. It is constructed by sequentially erecting shoring 10.10', and wall materials 11.11' between the retaining piles 9 and 9' downwards, and each retaining pile is The walls 8, 8' have a height that reaches at least from the slope surface to a position facing the upper end of the concrete foundation of the parent pile 5.

In the above, the H-shaped C! For the walls, we used shaped steel, square pipes, steel pipes, etc., and for the shoring, we used the shown jacks, and we used cut-and-cut wood for the walls. In addition, pipes, H-shaped steel, C-shaped steel, etc. with the desired cross-sectional shape may be used.

Next, between the parent cores 5, beam reinforcing bars 12 are arranged directly above the concrete foundation 6', and above them, wall reinforcing bars 13 are arranged, and the outside of these bars is shaped into a predetermined shape. After surrounding it with a frame, concrete is poured there and underground beam 14
Then, after a predetermined curing period, formwork and retaining wall 8.8/
will be dismantled and removed, and backfilling work 17, rear backfilling work 18, cutting work 19, and embankment work 20 will be carried out 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 (3) is mounted as shown. Reference numeral 22 in FIGS. 3 and 5 is a drain pipe penetrated through the wall 15.

Figures 7(a) and 7(b) show other examples in which pipes with the desired cross-sectional shape are used as wall materials for the retaining wall, and (a) shows a circular pipe 24 attached to the H-shaped steel 23 of the retaining pile. The end is inserted and locked with a stopper 25, and in (b) a square pipe 26 is used as the stopper, and a circular pipe is inserted into the receiving opening 26' arranged vertically. The end of the vibrator 27 is inserted and locked with a stopper 28.

As detailed above, according to the present invention, since the floor area is small, and therefore the excavation area and amount of excavation are also small, a small machine is sufficient for carrying out and carrying in (backfilling) the excavated soil.
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. Furthermore, as mentioned above, the retaining wall can be supported using the parent piles, so construction can be started simultaneously on all blocks adjacent to each other vertically and horizontally in a stair-like manner. In comparison, it is possible to significantly shorten the construction period. In addition, there is no need to support the retaining wall on the adjacent land, and since there is little backfilling soil, there is no need to temporarily store it in land C, etc., and there is no impact on the neighboring land G.
can also be minimized.

[Brief explanation of drawings]

Drawings Figure 1 is an explanatory diagram of the conventional housing 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 (
b) (b) is a schematic plan view and cross-sectional view of the underground retaining wall as constructed, Figures 4 and 5 are cross-sectional views and plan views of the underground retaining wall construction status, and Figure 6 is a schematic plan view of the underground retaining wall. Plan view of reinforcement situation, Figure 7 (
(a) and (b) are sectional views of main parts showing other examples of the stopper wall. 5... Main pile, 8.81... Mountain retaining wall, 10.
10'...Shoring, 14...Underground beam, 15...
・Wall body, 16... Underground retaining wall. N ~ Needle (166- Special opening H59-233028 (6)

Claims (1)

[Claims] 1. Set up free-standing rows of parent piles at predetermined intervals on the slope, and construct retaining walls at predetermined intervals on both sides of the row of parent piles. After erecting appropriate shoring between the above-mentioned main piles, underground beams and walls are formed between the above-mentioned parent piles to form an underground retaining wall, and the necessary cutting and embankment work is carried out. Housing land preparation method.