JPH0733674B2 - Cylinder press-fitting device into the ground - Google Patents

Description

TECHNICAL FIELD The present invention relates to a press-fitting device for burying a tubular body, for example, a reinforced concrete cylindrical well (hereinafter simply referred to as a PC well) in the ground in a vertical direction. Is.

(Prior art) Conventionally, this type of PC well was buried by digging a vertical hole in the
The wells are installed by hanging them in a vertical hole with a crane. Then, after the PC well is installed, it is the current situation that earth and sand are put into the pit to backfill it.

(Problems to be solved by the invention) By the way, conventional burying of PC wells requires a considerable amount of labor and days for vertical hole excavation and backfilling, and there is a place to temporarily accumulate the excavated earth and sand. It was necessary, and transportation of earth and sand was indispensable, and there were problems such as a large amount of cost and a lot of construction period.

The present invention has been made in view of the actual situation as described above,
It is an object of the present invention to provide a cylinder press-fitting device that can embed a PC well without digging a pit in the ground, and can shorten the construction period and cost.

(Means for Solving the Problem) In the present invention, in order to achieve the above-mentioned object, the following technical means is provided.

That is, the present invention provides a substantially ring-shaped base (1), a plurality of sliding bodies (3) arranged on the base (1) at equal intervals and movable in the radial direction, and each sliding body ( A jack (9) provided with a moving cylinder (5) of 3) and an engaging projection (13) arranged in parallel with the column (7) on each sliding body (3).
And a pressure ring (16) provided with an engagement piece (17) that engages with the engagement protrusion (13), and a cylindrical body (20) placed below the pressure ring (16). ) Is pushed down by the jack (9).

(Operation) According to the present invention, the base (1) is installed and fixed at the position where the tubular body is embedded, the tubular body (20) is positioned and placed on the ground, and the tubular body (2
After placing the pressure ring (16) on (0), the jacks (9) juxtaposed on the columns (7) are lifted, and the sliding bodies (3) are moved inward toward the moving cylinders (5). To move the engaging protrusion (13) to the engaging piece (1) of the pressure ring (16).
Engage in 7) respectively. Next, the jack (9) is moved downward, the cylinder body (20) is pushed down via the pressure ring (16), and is pressed into the ground. When the jack (9) reaches the lower limit, each sliding body (3) is retracted outward by the moving cylinder (5) to the engaging piece (17) of the pressure ring (16).
After disengaging the engaging protrusion (13) from the press fitting ring (16) and shifting the pressurizing ring (16) from the existing press-fitting cylinder (20b) to the temporary storage space, the next press-fitting cylinder (20b) is pressed. (20c) is placed, and the pressure ring (16) is placed on the tubular body (20c) again. Therefore,
Raise the jack (9) to the upper limit, and slide each sliding body (3).
Are moved inward by the moving cylinder (5),
After engaging the engaging protrusions (13) with the engaging pieces (17) of the pressure ring (16), respectively, the jack (9) is moved downward and the tubular body (via the pressure ring (16) ( 20) Press in. In this way, the press-fitting operation can be repeated to sequentially press-fit a plurality of cylindrical bodies (20) into the ground.

(Example) Hereinafter, the Example of this invention is described based on drawing.

In the drawings, (1) is a polygonal ring-shaped base, and sliding guides (2) are provided on the base (1) at intervals of 60 degrees with respect to the center of the ring in the radial direction. 2) A moving cylinder in which a slide body (3) capable of supporting a reaction force is provided slidably in a radial direction, and the end of a piston rod (4) is connected to the outside of a slide guide (2). (5) is provided in the sliding body (3). Then, on each sliding body (3), a jack mounting bracket (6) is fixed to the facing inner end, and a jack guide post (7) is provided outside each bracket (6). ), The hydraulic unit (8) is housed.

The jack mounting bracket (6) has an outer clevis (11) on the piston rod (10) of the jack (9).
Are connected by a pin (12) via a bush (not shown).

On the cylinder (9a) of each jack (9), engaging projections (13a) (13b) (trunnions) project downward from the middle of the head cover (9b) and project on the left and right sides parallel to the pin (12). It is provided, and the press-fitting stroke can be increased with one jack (9) by two-step operation. And
A substantially T-shaped guide (14) is provided at the position of the lower engaging protrusion (13b) on the surface of each cylinder (9a) facing the support (7), and is provided on the support (7). The guide (14) is engaged with the guide rail (15) so that each cylinder (9a) can be vertically moved up and down without falling.

(16) is a pressurizing ring, which is large enough to be inserted into each jack (9), and two pairs of engaging pieces (17) are provided outwardly corresponding to each jack (9). Each engagement piece (17) is formed with a notch (18) with which the projection (13a) (13b) is engaged. The ring (16) can be divided into three parts and is assembled by connecting means such as bolts and nuts. The ring (16) is connected to the lower side of the ring (16) via a cover ring (19), such as a PC well (20). ), And is optimally designed according to the diameter and thickness of the PC well (20).

Reference numeral (21) is a centralized control panel for centrally controlling the hydraulic unit (8) in each column (7). (22) is a level sensor of the pressure ring (16).

As shown in FIG. 4, the hydraulic circuit of the hydraulic unit (8) is configured to control each jack (9) and moving cylinder (5) by a centralized control panel (21). In the figure, (23a) and (23b) are the main oil supply pipe, (24) is the main oil discharge pipe, (25a) and (25b) are the oil supply and discharge pipes to the moving cylinder (5), and (26) is the descending side of the jack (9). (Press-fit side) Oil supply / drain pipe, (27a) is the oil supply / drain pipe for high speed jack jack, (27a)
b) Jack low speed oil supply pipe, (28) oil pump, (2
9) is a pump drive motor, (30) is an oil tank, (31) (3
2) is an oil filter. Also, (33) (34) (3
5) is a check valve, (36) (37) (38) is a pilot operated check valve, (39) (40) (41) (42) (43) is an electromagnetic switching valve,
(44) is a variable flow throttle valve with check valve, (45) (46) (47)
(48) is a relief valve, (49) is a digital pressure gauge, (50)
Is a pressure gauge.

A case where the PC well (20) is press-fitted into the ground in the apparatus of the above embodiment will be described with reference to FIGS. 5 (1) to (10). First, the pump drive motor (29) is started to operate the oil pump (28), and at the same time, the electromagnetic switching valve (39) connects the oil supply / exhaust pipe (25a) to the main oil supply pipe (23a) to move each moving cylinder ( 5) Oil is supplied to the piston rod (4) to advance, the sliding body (3) is retracted to the opposite outside, and the state shown in Fig. 5 (9) is established. Then, the electromagnetic switching valve (39) is moved to the fourth position. The oil supply / drainage shown in the figure is stopped, that is, the neutral state is set. Then at a predetermined position on the ground
Place PC wells (20a) (20b), and pressurize ring (1
6) Put etc. Therefore, the solenoid switching valve (40) is operated to connect the oil supply / exhaust pipe for high speed ascent (27a) and the main oil supply pipe (23a), and the cylinder (9a) of the jack (9) is rapidly ascended to the ascending limit. Set the solenoid switch valve (40) to the 4th position in the state of (10).
Return to the neutral state of the figure. At this time, the stroke signal (51) from the stroke sensor of each jack (9) is input to the centralized control panel (21), and the centralized control panel is used as a feedback signal of the inverter PG control signal (52) of the motor (29). It is input in (21).

Next, the electromagnetic switching valve (39) is operated to supply and drain the oil supply pipe (25b).
And the main oil supply pipe (23a) are connected to each other, pressure oil is supplied to the piston rod (4) side of each moving cylinder (5),
The jack (9) moves forward together with the support column (7), and the upper engaging projection (13a) is inserted into the notch (18) of the engaging piece (17) of the pressure ring (16), so that the sliding body is at the forward limit. (3) stops. Subsequently, the electromagnetic switching valve (39) returns to the neutral position, and at the same time, the electromagnetic switching valve (41) operates to connect the main supply oil pipe (23b) to the descending side (press-fitting side) supply / exhaust oil pipe (26).
The state of FIG. 5 (1) is reached, and the cylinder (9a) continues to descend. At this time, the stroke (51) from each stroke sensor, the press-fit pressure signal (5) of each digital pressure gauge (49)
3) and level signal (5) from each level sensor (22)
4) is input to the central control panel (21) and pressure ring (16)
Of the pump drive motor (29) is controlled by the inverter PC control signal (52) so that the level of the PC well (20) becomes horizontal, and the PC well (20) is press-fitted in the vertical state.

Then, as shown in FIG. 5 (2), when the cylinder (9a) of the jack (9) reaches the stroke lower limit, the electromagnetic switching valve (4
1) is switched to the return side shown in Fig. 4, and at the same time, the solenoid valve (40) connects the low speed rising oil supply pipe (27b) and the main oil supply pipe (23a), and the cylinder (9a) is slightly lifted. As shown in FIG. 5 (3), when the engagement protrusion (13a) is located at the center of the notch (18) in the vertical direction, the electromagnetic switching valve (40) is again in the neutral state. Then, the solenoid switching valve (3
The main supply oil pipe (23a) and the supply / exhaust oil pipe (25b) are connected by 9), and the sliding body (3) retreats radially outward by the moving cylinder (5) to the state of FIG. 5 (4). Become.

The electromagnetic switching valve (39) returns to the neutral state again, and the electromagnetic switching valve (40) connects the main oil supply pipe (23a) and the oil supply / discharge oil pipe (27a), and the cylinder (9a) of the jack (9) is halfway. Up, and the lower engagement protrusion (13b) is located at the center of the notch (18) of the pressure ring (16), the stroke signal (51) is set by the stroke sensor and the solenoid switching valve is input. Fig. 5 (5) with (40) in the neutral position
The state becomes as shown in.

Next, the main supply oil pipe (23a) and the supply / exhaust oil pipe (25a) are connected by the electromagnetic switching valve (39), and the sliding body (3) advances toward the opposite inner side, as shown in FIG. 5 (6). To the jack (9)
The engaging projection (13b) of the engaging piece (17) of the pressure ring (16)
When the electromagnetic switching valve (39) is returned to the neutral position, the electromagnetic switching valve (41) connects the main oil supply pipe (23b) and the press-fitting side oil supply / exhaust pipe (26) to the jack (9). The cylinder (9a) descends, the PC well (20a) is completely pressed into the ground, and about half of the upper PC well (20b) remains, resulting in the state shown in FIG. 5 (7). Therefore, the solenoid switching valve (4
The main oil drain pipe (24) and the oil supply / drain pipe (26) are connected by 1), the main supply oil pipe (23a) and the low speed rising oil pipe (27b) are connected again by the electromagnetic switching valve (40), and the cylinder (9a )
Is slightly raised and the locking projection (13b) is located at the center of the notch (18) of the engaging piece (17) as shown in FIG. 5 (8), the electromagnetic switching valve (40) is in the neutral position. The main supply oil pipe (23a) and the oil supply / exhaust oil pipe (25b) are connected by the electromagnetic switching valve (39), and the sliding body (3) is retracted radially outward by the moving cylinder (5). The state shown in FIG. 9 is reached, and the solenoid operated directional control valve (39) returns to the neutral position.

By the above operation, press-fitting of one PC well (20) is completed.

Next, the pressure ring (16) and the cover ring (19) are lifted from above the PC well (20b) by a crane or other moving device to move laterally and temporarily wait, and then the PC well (20
Place the 3rd PC well (20c) on top of b) and the cover ring (19) and pressure ring (16) on top of it to bring it to the state of Fig. 5 (10), and repeat the above operation. PC
Wells (20b) (20c) are pressed into the ground one after another.

According to the above-described embodiment, a cylinder press-fitting stroke that is approximately twice the stroke of the jack (9) can be ensured, and a large press-fitting stroke can be obtained with a jack having a substantially short stroke, and the jack (9) is inexpensive. That is, the entire device can be obtained at low cost. Further, the six jacks (9) and the moving cylinder (5) can be automatically controlled by the central control panel (21), and the level signal (54) of the level sensor (22) and the stroke sensor can be controlled. With the stroke signal (51) and the press-fitting pressure signal (53), the operation of the pump drive motor (29) is controlled, and the PC well (20) can be pressed into the ground accurately and reliably while maintaining the vertical state. it can.

The present invention is not limited to the above embodiment, and for example, a normal jack (9) can be adopted.

(Advantages of the Invention) As described above, the present invention provides a substantially ring-shaped base (1).
A plurality of sliding bodies (3) arranged on the base (1) at equal intervals and movably in the radial direction, and each sliding body (3)
Moving cylinder (4), a jack (9) provided with an engaging projection (13) juxtaposed with the column (7) on each sliding body (3), and the engaging projection (13). Engaging piece (1
The pressure ring (16) provided with 7), and the cylindrical body (20) placed under the pressure ring (16) is pushed down by the jack (9) to be pressed into the ground. Since it is a thing, it is not necessary to excavate a pit in the ground unlike the conventional case,
No need to carry excavated soil and backfilling work, which greatly shortens the construction period and significantly reduces the construction cost.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a plan view,
2 is a partially cutaway enlarged side view, FIG. 3 is an enlarged view of part A of FIG. 1, FIG. 4 is a hydraulic circuit diagram, and FIGS. 5 (1) to (10) are tubular body press-fitting operation explanatory diagrams. is there. (1) ... Base, (3) ... Sliding body, (5) ... Moving cylinder, (7) ... Strut, (9) Jack, (13) ...
… Engagement protrusions, (16) …… Pressure ring, (17) …… Engagement pieces, (20) …… Cylinder.

Claims (1)

[Claims] 1. A substantially ring-shaped base (1), a plurality of slide bodies (3) arranged on the base (1) at equal intervals and movably in a radial direction, and each slide body (3). ) A moving cylinder (5), a jack (9) provided with an engaging projection (13) arranged in parallel with the column (7) on each sliding body (3), and the engaging projection (13). ) And a pressure ring (16) having an engagement piece (17) for engaging with the pressure ring (16), and the cylinder (20) placed below the pressure ring (16) is pushed down by the jack (9). A cylindrical body press-fitting device into the ground characterized by the above.