JPS5814527B2 - Horizontal sheet pile drilling method and its equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a horizontal sheet pile insertion method and apparatus for mechanically inserting horizontal sheet piles used for earth retaining between parent piles accurately and efficiently without relying on human hands. It is related to.

The currently implemented main pile horizontal sheet pile method is the main pile 3 that has been driven.
The earth and sand 32 between 0a and 30b (usually using H-shaped steel) is excavated by manual excavation, and while securing the insertion space for the horizontal sheet piles, the horizontal sheet piles are cut to match the parent pile spacing and inserted by hand.
A construction method was adopted in which the excess excavated portion 33 was backfilled manually (see Figure 1).

Therefore, in addition to various disadvantages caused by manual work, such as inefficiency and uneven length of horizontal piles inserted between parent piles, making it difficult to align and insert them, and the amount of soil discharged is also uneven, etc. Therefore, there is an inconvenience that backfilling of the over-excavated portion 33 is likely to be uncertain, which is a major cause of uneven settlement in neighboring areas.

Furthermore, since the above-mentioned "over-excavation" is carried out, the over-excavation part of the back soil becomes uneven, and even if it is completely backfilled, the adhesion between the soil and the inserted horizontal sheet pile is weak and uneven settlement in neighboring areas is unavoidable. There are fundamental inconveniences.

The present inventor has focused on the above-mentioned points and has newly developed the horizontal sheet pile insertion method and its device according to the present invention, and the intention is to minimize manual labor and eliminate excessive digging. The purpose is to mechanically insert the horizontal sheet piles accurately and efficiently.

That is, with this intention in mind, the present invention specifically positions the weighted blade body so that it can be lowered through a guide engaged with the parent piles between the driven parent piles, and horizontally moves the weighted blade body above the blade body. The sheet piles are connected, and the blade body uses the overall weight and falling impact energy of the weight to shear and discharge the earth and sand between the parent piles. The purpose of this invention is to provide a method for inserting horizontal sheet piles in which the horizontal sheet piles are propelled down into the earth and sand between the parent piles. a weight that applies falling impact energy to the body, a pair of guides located on both sides of the central blade body and each engaged with the driven parent piles, and both side blade bodies attached to the central blade body or the guides. It is an object of the present invention to provide a horizontal sheet pile insertion device comprising:

The details will be explained below based on the illustrated embodiment. First, this device is mainly composed of a central blade 1, a weight 2, a pair of guides 3, 3, and both side blades 4, 4.

The central blade 1 may be a single piece or a piece made up of multiple pieces, but
In the example shown in Fig. 2, it consists of a plurality of blade bodies 1a, 1b, 1c,
The blade 1a is designed to serve as a base for the other blades 1b and 1c.

That is, the blade 1a forming a part of the central blade has a receiving part 5 at the upper part.
It has a rod 7 extending from side to side in the central part 6, and is combined with the other blade bodies 1b and 1c via this rod 7. Although not shown in the drawings, it is pre-equipped with a spring or other means to hold the blade against the blade 1a. 1b and 1c are extendable and retractable in the left-right direction (arrow A), and in the example shown in FIG. 5, they are integrated.

These central blade bodies 1, 1a to 1c have a structure in which the cutting edge portion 8 at the lower end can be exchanged with cutting edge portions of various shapes depending on the properties of the soil, for example, a straight edge type cutting edge portion as shown in FIGS. 3a to 3d. 8a, a wavy cutting edge part 8b, a serrated cutting edge part 8C, and a half-moon cutting edge part 8d can be used selectively or in combination, so that the cutting edge part 8 can be used in the central cutting body 1, 1a to 1c. It is fitted into the base portions 9a to 9d of and fixed with bolts 10.

The central blade body 1 allows a plurality of horizontal sheet piles 11a, 1lb to be connected in succession above.

That is, two guide posts 12 for the weights 2 are set up above the blade 1a (above the receiving part 5 in FIG. 2), and a clamp fitting 13 for gripping the lower end of the horizontal sheet pile 11a is provided at the upper end of the guide posts 12.

The other horizontal sheet pile 1lb is connected to the previous horizontal sheet pile 11a via the hook 14 in FIG.

Further, in FIG. 5, the central blade is integrally joined and continuous by a band-shaped metal plate 21 connected to the upper part of the central blade.

This band-shaped metal plate 21 is provided on both sides of the front side 22 and back side 23 of the horizontal sheet pile, but at least the back side 23
It is preferable to provide the grooves in the horizontal direction to improve sliding when inserting the horizontal sheet piles.

Note that the plurality of horizontal sheet piles 11a and 1lb are cut uniformly to a desired length in advance.

Therefore, in a continuous state, each horizontal sheet pile is aligned with the others, and especially when integrally joined with the band-shaped metal plate 21, deviation in the left and right direction is restricted, and irregularities may occur. Must not be.

The weight 2 is attached to the guide column 12 through two through holes 15, and is lifted up and dropped by a lifting means (not shown) such as a chain 16, rope, or cable.

The pair of guides 3, 3 are located on both sides of the central blade 1, and are engaged with the driven parent stakes 17, 17, respectively.

Since the parent piles 17, 17 are usually made of H-shaped steel, the guides 3, 3 can have a structure that wraps around the flange part 18. A capsule mold (Figure 4) is used.

However, it goes without saying that these guides 3, 3 can have various shapes and structures corresponding to those of the parent piles 17, 17, and may be provided with things such as rubber rollers.

The pair of guides 3, 3 are separably attached to the central blade body 1, and in the example shown in FIG. 2, they are attached via a hinge 19 and can be separated by removing the shaft of the hinge 19.
In the example shown in Fig. 5, each end is rotatably connected to a pair of guides 3,
A pair of telescoping shafts 25 with spring bodies 24 supported by 3 are connected and attached to the central blade 1 in a substantially V-shape, and can be separated by removing the shafts from the central blade. It's like this.

Both side blade bodies 4, 4 are the above-mentioned central blade body 1 or guides 3, 3.
It is attached to the inner part 20. of the main piles 17, 17.
20.

Next, the insertion method will be explained.

The guides 3, 3 are engaged between the driven main piles 17, 17 to position the central blade 1 with the weight 2 so that it can be lowered.

At this time or in advance, the horizontal sheet pile 11a is connected to the upper part of the central blade 1 via the clamp fitting 13.

In the case of FIG. 5, a band-shaped metal plate 21 is further attached to the upper part of the central blade 1 and fixed to the horizontal sheet pile by nailing or other means.

Then, the chain 16 connected to a winch (not shown) or the like is lifted up, the weight 2 is moved upward, and then the weight 2 is caused to fall, and the falling/impact energy is transferred to the central blade body 1 (specifically, the receiving part 5 in FIG. 2). Add to.

Then, due to the weight of the entire device and this falling/impact energy, the central blades 1, 1a to 1c and both side blades 4, 4,
While being positioned in the left and right direction by the guides 3, 3, it is propelled and lowered into the earth and sand between the parent piles 17, 17.

Therefore, the earth and sand in the inner parts 20 and 20 of the main piles 17 and 17 are sheared by the blades 4 and 4 on both sides, and the earth and sand in the central part between the main piles is sheared by the central blade 1 on the front side (Fig. 2). Then, the horizontal sheet pile 11a was inserted so that the lower center blade body and both side blade bodies 4, 4 were pulled into the excavated gap, and the horizontal sheet pile 11a was successively connected to this horizontal sheet pile 11a. Multiple horizontal sheet piles are also inserted in the same way.

At this time, the guides 3, 3 described above wrap around the flange portions 18 of the parent piles 17, 17 and move smoothly in the excavation direction in accordance with the overall weight of the device and impact energy.

In this case, especially when a band-shaped metal plate 21 is applied to the back side of the horizontal sheet pile as shown in FIG. 5, the band-shaped metal plate 21 acts as a lubricant and progresses more smoothly.

The driven main piles 17, 17 are "shifted" in the vertical direction.
Even if the guide 3 is
, 3 slide down in the same way, and the central blade 1 is propelled and propelled while absorbing the displacement via the hinge 19 and spring (not shown) in FIG. 2, and via the telescopic shaft 25 in FIG.
Descend.

Therefore, even if there is a change in the distance (left and right direction) between the main piles 17, 17, the central blade 1 expands and contracts itself, or the shaft expands and contracts, absorbing the change in distance, and the earth and sand between the main piles are removed. Therefore, the cutting edge portion 8 can always be used.

After inserting the horizontal piles 11a and 11c, hinge 1
By removing the shaft rod 9 (Fig. 2) or removing the shaft from the central blade body, the guides 3, 3 and the central blade body 1 are separated, removed from each parent stake 17, 17, and moved to the next insertion location. Let it happen.

As explained above, according to the present invention, many effects can be expected compared to the conventional horizontal sheet pile insertion, and the main ones are listed below.

(B) Since there is no need for any additional digging or backfilling, the risk of uneven settlement in the neighborhood is greatly reduced, and even if buildings, roads, or other objects are located close to the construction site, there is very little possibility of any negative impact.口）The inserted horizontal sheet piles are aligned with the parent pile and do not become irregular, and they can maintain a close contact with the rear surface.Furthermore, when a band-shaped metal plate is applied to the back side of the horizontal sheet piles, The belt-shaped metal plate acts as a lubricant and makes it easier to enter the system, and (c) the manual work process is largely omitted and the insertion of the horizontal sheet piles is mostly automated, resulting in significant improvements in work efficiency and work accuracy. 9. Of course, it is also possible to sufficiently reduce operational expenses.

[Brief explanation of the drawing]

Fig. 1 is a schematic perspective view showing a conventional main pile side pile sheet pile in an inserted state, Fig. 2 is a perspective view illustrating a side sheet pile insertion device according to the present invention in an inserted state, and Figs. 3 a to 3d are FIG. 4 is a partial perspective view showing a modified example of the cutting edge portion of the central blade, FIG. 4 is a partial perspective view showing a modified example of the engagement state of the guide with the parent pile, and FIG. FIG. 2 is a perspective view showing a horizontal sheet pile insertion device in which horizontal sheet piles are joined with band-shaped metal plates. In the figure, 1, 1a to 1c... central blade body, 2... weight, 3, 3...
A pair of guides, 4, 4...both side blade bodies, 11a, 1lb
- Horizontal sheet pile, 17, 17... Main pile, 21... Band-shaped metal plate, 25
…shaft.

Claims (1)

[Scope of Claims] 1. A weighted blade is positioned so as to be descendable between the driven main piles through a guide engaged with the main pile, and a horizontal sheet pile is connected above the blade, and the whole Utilizing the weight and energy of the falling impact of the weight, the blade shears and discharges the earth and sand between the main piles, and together with the blade, the above-mentioned horizontal sheet pile and a plurality of horizontal sheet piles successively connected to this horizontal sheet pile are used to shear and discharge the earth and sand between the main piles. A construction method for inserting horizontal sheet piles that are propelled and lowered into the interior. 2. The horizontal sheet pile insertion method according to claim 1, wherein the earth and sand between the parent piles includes earth and sand from the inner side of the parent piles. 3. A central blade that allows multiple horizontal sheet piles to be continuous upward;
A weight that applies falling impact energy to the central blade, a pair of guides that are located on both sides of the central blade and are respectively engaged with the driven parent piles, and both sides that are attached to the central blade or the guides. A horizontal sheet pile insertion device consisting of a blade body. 4. The horizontal sheet pile insertion device according to claim 3, wherein the central blade is provided with a band-shaped metal plate on its upper portion that continuously and integrally joins the horizontal sheet piles upward. 5. Insertion of horizontal sheet piles according to claim 3 or 4, wherein the central blade has a substantially V-shaped telescopic shaft and is connected to both guides via the shaft. Device. 6. The central blade body is formed of a plurality of blade bodies, and the blade edge part thereof can be freely expanded and contracted in the left and right direction between the two parent stakes.
A horizontal sheet pile insertion device according to any one of claims 3 to 5. T Insertion of the horizontal sheet pile according to any one of claims 3 to 6, wherein the cutting edge portion of the central blade body is replaceable with cutting edge portions of various shapes according to the properties of the earth and sand. Device. 8. The horizontal sheet pile insertion device according to any one of claims 3 to 7, wherein the central blade and the pair of guides on both sides thereof are separable.