JPS60238522A - Ground penetrator - Google Patents

Abstract

PURPOSE:To prevent the deformation and breakage of a pile by providing a vertically movable penetrating blade whose tip is positioned below the lower end of a pile and a driver to the lower end of the pile to be penetrated. CONSTITUTION:A ground penetrator 1 has the body 5 connecting to a pile 4 to be penetrated and to be grasped by the chuck 3 of a static load type pile constructor 2. The body 5 also has a wedge-clamping type clamp 6 to be synergistically worked with a wedge presser 8, and thereby a pile 4 is clamped between the body 5 and the clamp 6. A ground penetrating blade 10 with a chisel 9 is provided in a vertically movable manner and positioned downwards from the lower end of the pile 4 when the tip of the blade 10 is connected with the pile 4. The pile can thus be sturdily penetrated similarly to the penetrating condition of single pile, and the scale of the equipment used can be made smaller than the conventional ones.

Description

[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a ground penetrating machine, particularly a pile press-in machine, and more specifically, a chuck grips a pile to be press-fitted and press-fits the pile into the ground by applying a static push-down load. The present invention relates to a ground penetrating machine that is used in combination with a pile press-in machine (hereinafter referred to as a static load type pile construction machine).

Technical background of the invention and its problems The static load type pile construction machine can construct piles without noise and with 'R' motion, and does not cause damage or deformation of the pile head. However, there is a problem in that a push-down load is applied to the pile through a chuck that is gripped at an above-ground location, or in other words, a press-fitting load is applied to the pile at an above-ground location. That is, P.
When press-fitting piles, the engineering resistance is the resistance at the tip of the pile,
It is the addition of peripheral surface resistance and section resistance,
In this regard, applying a press-fit load at the above-ground part of the pile will result in a large loss of force due to these resistances, and with a pile tip pile construction machine, if there is an obstacle layer such as boulders or gravel in the ground, It is difficult or impossible to press in the pile. Forcibly press-fitting the pile may cause deformation or damage to the tip of the pile, or worsen the directionality of the bip, causing the pile to collapse, increasing section resistance, etc., and making it impossible to carry out subsequent pile construction. .

However, the reality is that no effective countermeasure has yet been established to simply solve the water bending problem of static load type pile construction machines.

Conventionally, in pile construction using a static load-type biμ construction machine, the method of assisting the press-in of the pile has relied on excavation by jet water or a combination of excavation with an earth auger. According to this, the ground is excavated at the tip of the pile at the same time as the pile is press-fitted, that is, an excavation means is additionally installed at the tip of the pile, so the effect of press-fitting the bip itself is improved, but the former In the latter case, the ground was loosened due to water seepage, and in the latter case, the hole drilled by the auger was too large.
In both cases, it is more difficult to firmly press in the pile than in the case of independent pile press-in construction without such additional auxiliary means, and in both cases, additional auxiliary press-in means such as excavation are required. If this is used in combination, the overall size of the static load type pile construction machine will inevitably increase considerably. Thus, the above-mentioned problems of static load type pile construction machines cannot be easily solved by conventionally known construction methods.

OBJECT OF THE INVENTION Therefore, the present invention aims to solve this problem in a simple manner.

Furthermore, the present invention is applicable not only to pile construction with a specification that allows the operation to be performed concurrently with the pile construction, but also only when necessary during pile construction, that is, at locations of obstruction layers such as stones and gravel in the ground. The purpose of the present invention is to provide a ground penetrating machine capable of performing pile construction by operating the machine while the tip of the pile is breaking through, and at other times pulling it out to the ground and leaving it on standby.

The ground penetrating machine of the present invention is used in combination with a static load pile construction machine (i.e., a pile press-in machine that grips the pile to be press-fitted with a chuck and press-fits it into the ground by applying a static push-down load). A ground penetrating machine that penetrates into the ground prior to the pile, and includes a main body having a tightening means and releasably tightened to the lower end of the press-fitted pile by the tightening means, the main body The grade is characterized by being equipped with a vertically movable ground penetrating blade whose tip is located below the lower end of the bi when the grade is joined, and a drive machine that drives the grade.

Effect of the Invention In the present invention, the main body of the penetrating machine is tightly connected to the lower end of the pile to be press-fitted by its tightening means, so that the main body is integrated with the pile to be press-fitted, and under this connection,
The tip of the ground penetrating blade will be located below the lower end of the pile. Therefore, after the main bodies are connected, the press-fit pile is grasped with the chuck of the static load type pile construction machine, or the press-fit pile is held in the chuck during construction of the static load type pile construction machine.
, connect the main body to this, press-fit the press-fit pipe P by applying a static push-down load to the chuck, and then press the blade against the press-fit pile using a ground penetration grade drive machine. By pressing down, the blade can be penetrated into the ground prior to the pile being pressed in. Preliminary penetration into this grade of ground can be proceeded by repeating the operation of returning to the original position with a drive machine and pushing down again when the push-in pile reaches its limit. Pre-grade ground penetration assists pile press-in.

The advance penetration of the ground by the blade described above can be achieved by maintaining the connection of the penetration machine body to the lower end of the press-in pile.
/ During construction, after pulling the intruder to the ground together with the pile, return the pile to the site where the pile was pulled out, or loosen the tightening means and uncouple the intruder body, If the penetrating machine is pulled out to the ground using the pre-connected wire rope, only the pile will be press-fitted, that is, the operation of the penetrating machine of the present invention will be stopped.To restart the advance penetration of the ground by the blade, pull out the pile once and then press-in the pile. Reconnect the penetrating machine body to
This can be done by inserting the pile into the ground where it has been pulled out.

Effects of the Invention As described above, according to the present invention, the pile press-in is assisted by the pre-penetration of the ground by the curved water blade, so the pile can be press-fitted in the same state as if it were press-fitted alone. According to the construction of the present invention, the equipment required for assisting pile press-in can be smaller in scale than in the past. Therefore, in the present invention, the above-mentioned problems of static load type pile construction machines can be easily solved.

In the present invention, since the main body of the penetrating machine is tightly connected to the lower end of the press-fitted pile by the tightening means,
During pile construction, we do not only perform pile construction with specifications that include preliminary penetration of ground penetration grade, but also perform bi-not-tight removal of obstructions such as boulders and gravel in the ground only when necessary. It is also possible to construct piles in such a way that the ground penetrating blade is operated underground while the tip is breaking through, and at other times the penetrating machine is pulled out and stands by on the ground.

Example Embodiments of the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 3.
In Figure 2.8, (1) is a ground penetrating machine used in conjunction with the static load type pile construction machine (2) [Fig. 10 1], which is known per se. 3)
The main body (5) is connected to the press-fit biμ (4) which is gripped by the
, said body (5) having clamping means, such as a wedge-type clamp (6), for releasably clamping it to the lower end of said pile (4). The clamp (6) is driven by a drive machine, for example a hydraulic drive machine such as a hydraulic cylinder plunger device (7) or a drive machine such as an electric screw jack, and is operated in cooperation with the horizontal presser foot (8). Main body below (5)
Tighten the pile (4) between and the clamp (6). Clamp (6) with hydraulic cylinder plunger device (7)
), the tension is released.

The hydraulic cylinder plunger device (7) is pivotally connected to the clamp (6) at one end and to the body (5) at the other end.

The main body (5) is equipped with a ground penetrating blade qO) with a chisel attached to the tip, more preferably with a chisel (9) attached removably, so as to be movable up and down, and a driver for driving the blade qO, such as a hydraulic cylinder. - Equipped with a hydraulic drive machine such as a plunger device 01) or a drive machine such as an electric screw jack. The tip of the blade (10) is located below the lower end of the pile (4) when the main body (5) is connected to the lower end of the pile (4). The hydraulic cylinder/plunger device U has a main body (
5) and the other end is pivotally connected to the ground penetrating blade q■. +121 (:i'2 is the guide rail formed on both the left and right sides of the lower end of the main body (5), and the guide rail /'i+31:12 is the left and right ear of the upper half side (10a) of the ground penetration grade q The opening 3... is a clamp of the static load type pie/L' construction machine (2).

Other embodiments of the present invention are shown in FIGS. 4 and 5.
．． In FIG. 5, the same reference numerals as in FIGS. 1 to 8 indicate the same parts. The one in Figure 4.6 has two hydraulic cylinder plunger devices (11) on the left and right, and eliminates the vertical movement guide of the ground penetrating blade t101 by the guide tray fv (13f12) in Figures 1 to 3. Except for this, the structure is the same as that of the embodiment shown in FIGS. 1 to 8.

The ground penetrating blade [1 (11) may be of the type shown in Fig. 6.7 in addition to the types shown in Figs. 1 to 5.

Modified examples of the tightening means are shown in FIGS. 8 and 9, and FIG.
In Figure 9, the same symbols as in Figures 1 to 8 indicate the same parts, and the one in Figure 8.9 is an eccentric claw type clamp (18
) is connected to the rear end of the clamp by pulling the wire rope 191 upward and rotating it in the clockwise direction in Fig. 8 to perform the required tight connection, and attach the guide pulley ■ to the rear end of the clamp 1 boat. By pulling the wire rope (21) connected through the clamp upward, the clamp (body) is turned in the opposite direction to release the clamp.

The upper ground penetrating machine of the present invention assists in the press-in of the pile in the following manner.

A low press-fit pie, TV (a)... is grasped with a clamp (131) and the pie 1v(a)... is held free-standing on top of the silent load type pie/I/ chuck (3) of the construction machine (2). Pressure-fitted pie/
" +41, and tighten it to the lower end of the pile (4) using the penetrating machine main body f511 clamp (6) or (181).

Under this condition, a static downward load is applied to the chuck (3) to press the pile (4) into the ground, and the pile (4) is inserted into the hydraulic cylinder/plunger device +111 simultaneously with construction or when necessary. Yoshi ground shell blade IIG pie/l
/ If you press down on +41, the corresponding grade (
]0) The press-fitting of the pile (4) is assisted by the preliminary penetration into the ground.

During the construction of the above pie A/(41), if the penetrating machine (1) is pulled out to the ground together with the pie/"+41, or the pile (4)
If the main body (5) is uncoupled from the main body (5) and the penetrating machine (1) is pulled out to the ground, the penetrating machine (1) will be in a non-operating state and the pi A
/+41 press-fit only construction specifications are possible. Ground penetration blade! ] Pi/V +41 due to advance penetration of Cfl
To assist in press-fitting, pull out the pile (4) and reconnect the penetrating machine body (5) to it.
1 should be returned to the ground where it was pulled out.

The static load type pile construction machine (2) can be of the following configuration: a chuck (3) that grips the press-fit pile (4) on a low press-fit bi 1v (clamp 13 that grips al...); ) are arranged adjacent to each other, and the chuck (3) is moved between the clamp and the relative vertical movement and the above-mentioned Pi/I/(a) parallel direction by appropriate means. Relative back-and-forth driving is possible at a pitch greater than the pile parallel pitch, and furthermore, by appropriate means, the shift ramp fl... can be linearly traversed in the direction that traverses the parallel direction. It is designed to be able to rotate. In addition to this configuration, chuck (3)
More preferably, it is rotatably displaceable by more than 180° in a direction around its vertical axis. Such a required drive or rotational displacement of the chuck (3) may be effected by a hydraulic cylinder/plunger device or a hydraulic motor, which are known per se.

In the static load type pi) V construction machine (2) shown in Figure 10, I is between the clamp t13)... and the chuck (3).
) is a hydraulic cylinder/plunger device that drives the chuck (3) up and down relatively, one end of which is connected to the main body of the chuck (3), and the other end of which is connected to a mast (05) that can be pivoted horizontally, more preferably pivoted. be combined. Mast (151 is Pi/L/(a)... Via u(a) in parallel direction...
・Parallel pitch I L−)j −1”/ −IaI
I'Z, 1. 41 cells hCCS/I+ −
/ h' -1- It is installed on the slide base 06) which can be driven forward and backward by the plunger device, and is mounted on the slide base 0.
The mark is mounted on Sadzlz[η with a clamp (131).

In addition to the above-mentioned static load type pile construction machines, the pile press-in reaction force can be absorbed by the dead weight of the static load type pile construction machine, or by using an earth auger or similar screw anchor installed in the ground. It is also possible to use a static load-type pi/l' construction machine that uses a winch to apply a static downward load to pi μ.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
Figure 3 is a sectional view taken along the line ■~■ in Figure 1, Figure 4 is a front view showing the other side of the implementation of the present invention, Figure 5 is a side view thereof, and Figure 6 is a sectional view taken along the line Figure 1. FIG. 7 is a front view showing a modified example of the ground penetrating blade, FIG. 7 is a partially cross-sectional side view thereof, FIG. 8 is a front view showing a modified example of the tightening means, FIG. 9 is a side view thereof, and FIG. 10 is a diagram showing the present invention. FIG. 2 is a front view showing how the penetrating machine is used together with an example of a static load type pipe IV construction machine to which the present invention is applied. (1) is a ground penetrating machine, (2) is a static load type pie IV construction machine, 13! ! Yuzuru chuck, (4) is press fit pile, (
5) is the main body, (6) is the model clamp (tightening means), +71, (IIJ is the hydraulic cylinder plunger device (driver), (9) is the chisel, Oσ is the ground penetrating blade, and 0 is the pre-pressured pile. +la is an eccentric claw type clamp (tightening means), +19), f2n is a wire rope. (Above)) Agent: Eiji Saegusa, Patent Attorney, Figure 1 Figure 2 Figure 4 Figure 1 Figure 5 Figure 7 Figure 1 ＼ Figure 8 $10 Figure

Claims (1)

[Claims] ■ It is a ground penetrating machine that is used in conjunction with a pile press-in machine that grips the pile to be press-fitted with a chuck and press-fits it into the ground by applying a static downward load, and penetrates into the ground before the pile to be press-fitted. The main body has a tightening means and is releasably tightened to the lower end of the press-fit biμ by the tightening means. 1. A ground penetrating machine characterized by being equipped with a ground penetrating blade that can move up and down, and a drive machine that drives the blade.