JPH0684622B2 - Parent-side Yokoyaita method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a side pile method for a parent pile.

(Conventional technology) When making the foundation of a building or a basement, dig into the ground,
So-called root cutting is performed, but if this root cutting depth becomes 1.5 m or more and exceeds the self-standing height, or if the root cutting side surface is unstable even if it is unstable, the side surface will collapse. Mount a cliff to prevent it. There are various mountain stoppers,
When using the parent piles, set up the parent piles at appropriate intervals along the boundary of the site, bridge the horizontal sheet piles between these parent piles as the root cutting progresses, and angry these parent piles. It is supported by a crossbeam.

In the case of constructing a frame over the site by using this parent pile side sheet pile construction method, as shown in FIG. 4, a side sheet pile 2'is provided outside the parent pile 1'and the parent pile 1 ' Is being installed in the body.

(Problems to be solved by the invention) However, the above-mentioned pier pile by the side pile piling method is
When a steel column is located in the basement or when a wall reinforcement or the like is jointed, the steel column or the joint part or the like interferes with the erection of the erection, and there is a problem that the underground construction is difficult to perform.

In addition, since this bulging corresponds to the mountain stopper side pressure with bending strength, the member cross section tends to become large.

The present invention has been made in view of the above problems, and its purpose is to utilize the parent pile side sheet pile construction method, when constructing a skeleton to fill the site, joints such as underground steel columns and wall reinforcements. It is an object of the present invention to provide a parent pile lateral sheet pile construction method in which the portion does not hinder the abdominal wake up and the ridge stop side pressure can be coped with by the tension material.

(Means for Achieving the Subject) The parent pile lateral sheet pile method of the present invention for achieving the above-described subject is to drive a parent pile at a constant interval around the periphery of the excavation, and between the parent piles. As the root cutting progresses outward, the transverse sheet piles are laid, and the cutting beam is laid directly on the predetermined parent pile, and the tension material is stretched between the parent piles of the cutting beams. The construction is characterized by supporting the main piles that are not spanned by the beams.

(Operation) Thus, according to the main pile side sheet pile construction method having the above-mentioned configuration,
A mountain girder is supported by directly spanning a cross beam to a specified main pile, and by stretching a tension material between the main piles on which the cross beam is bridged to support the main pile on which the cross beam is not crossed. Since the lateral pressure is converted into a tensile material to obtain the same function as the bending ability of the abdomen, it is possible to eliminate the abdomen, facilitate underground construction, and shorten the construction period.

(Example) Hereinafter, one example of the present invention will be described in detail with reference to the drawings.

1 and 2 are a cross-sectional view and a plan view showing an embodiment of the parent pile side sheet pile construction method of the present invention.

[Driving of the parent pile] First, the parent pile 1 is cast just along the boundary line m of the site M to be excavated.

The parent pile 1 is an H-shaped steel and is driven around the site M at appropriate intervals.

[Construction of cutting beams] Next, as the root cutting progresses, the cross sheet piles 2 are inserted between the main piles 1 to provide ridge-stops, and the predetermined main piles 1 (every two in the drawing) are cut into beams 3. Bridge directly.

In addition, the horizontal sheet pile 2 is to be inserted outside the main pile 1 in order to construct a skeleton for the entire site.

It should be noted that the cutting beams 3 are not limited to being installed every two lines as described above, but may be installed every required number, for example, every three or four lines.

[Tensioning of Tensile Material] As described above, after the cross beam 3 is erected, the tension beam 4 is laid across the main pile 1 on which the cross beam 3 is directly erected, and The parent pile 1a that is not erected is supported.

The tensile member 4 is made of PC steel wire, PC stranded wire and PC with excellent corrosion resistance.
It is a steel rod, and is stretched at appropriate intervals from the upper end to the lower end of the main pile 1 as shown in FIG. 2, and is stretched alternately with the tension members 4a in the other blocks adjacent to both sides. .

Further, after the tension member 4 is stretched, one end is tensioned with a tension jack to give a high tension to the tension member 4, so that the main pile 1a, which is not bridged by the cross beam 3, can face the earth pressure. It can be obtained, and can cope with the mountain stopper side pressure.

(Effects of the Invention) The present invention has the following effects due to the above configuration.

Parent piles are laid at regular intervals around the excavated area, and horizontal sheet piles are laid on the outer side between the parent piles according to the progress of root cutting, and the cross beams are directly laid on the predetermined parent piles. , A tension member is stretched between the main piles of the cut beams to support and form the main piles of the cut beams that are not bridged, so that the mountain is stopped without raising the belly. Therefore, even when a joint part such as a steel column or wall reinforcement is located underground, the abdomen wake up does not interfere and underground work at the root cutting bottom can be easily performed, and work efficiency can be improved. .

Since the parent pile can be provided with the strength to face the earth pressure with a tension material that replaces the abdomen, the safety can be further enhanced.

When the main pile is erected via the abdomen, it is not necessary to take necessary measures for erection, so that the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a plan view of a parent pile side sheet pile construction method of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a sectional view, and FIG. 4 is a sectional view showing a conventional parent pile side sheet pile construction method. In the figure, 1: parent pile 2: horizontal sheet pile 3: crossbeam 4: tensile member m: boundary line M: site.

Claims (1)

[Claims] 1. A parent pile is driven around the excavation at regular intervals, a cross sheet pile is laid on the outer side between the parent piles according to the progress of root cutting, and a direct cutting beam is directly attached to the predetermined parent pile. A parent pile horizontal sheet pile construction method, in which a tensile member is stretched between the parent piles of the cut beams to support the parent piles of which the cross beams are not bridged.