JPS59233021A - Excavation work - Google Patents

Abstract

PURPOSE:To facilitate the excavation of a pit by a method in which a rotary bit is set between guide frames erected into left and right-handed paired guide-setting holes, and excavation is made while moving the bit toward the longitudinal direction of the pit along the guide frames. CONSTITUTION:Left and right-handed paired guide-setting holes 1 are excavated, and guide frames 2 are erected into the holes 1. Cross frames 6 and 11 are attached to the guide frames 2 and also an oil-pressure cylinder 7 is attached to the cross frames 6 and 11. A presser tube 10 is attached to the presser plate 9 attached to a piston rod 8, and a bracket 14 provided with a rotary bit 15 capable of lowering along the guide frames 2 is provided to the tip of the tube 10. When a motor 21 is driven, the bit 15 is turned to excavate the natural ground 22 between the pits 1.

Description

[Detailed description of the invention] The present invention relates to an excavation method.

That is, a guide frame is installed in a pair of left and right guide installation holes that have been drilled in advance, and then a rotating bit is stretched between the guide frames and is moved in the longitudinal direction of the hole along the guide frame. It is designed to excavate the ground between the holes that have been previously drilled.

The excavation method of the present invention does not involve excavating a vertical hole all at once; instead, a hole is excavated in advance for installing a guide frame, and the rotary bit is moved in the longitudinal direction of the hole using this guide frame as a guide to perform excavation. Since it is a type of material, it has the feature that it can easily drill holes without the need for large-scale excavation equipment.

The embodiments shown in the drawings will be described below.

+1) (+) is a pair of left and right guide installation holes drilled in advance in the ground, +2) (2) is the guide installation hole m (1
) is a guide frame that is built into a guide frame, and has a sharp tip and a U-shaped cross section.

A water pipe (3) and a hydraulic pipe (4) are housed inside the U-shaped cross section, and their surfaces are covered with a guide plate (5). (2) The upper horizontal frame (6) connecting (2) is suspended horizontally, and the hydraulic cylinder (7) (7
) is attached, and a push-down plate (9) is attached via a universal joint at the tip of this piston rod (8) (8), and the push-down pipe α@ directly connected to this push-down plate (9) is It is designed to be guided by the guide tube a of the lower horizontal frame aυ which is prepared between the frames separately from the horizontal frame (6) and can be joined together according to the horizontal frame (6).aQ indicates the joint of the push-down tube 0@ .

A U-shaped bracket α→ is directly connected to the tip of the push-down tube (10), and a cylindrical rotary pin (IG) with a chip planted on the surface is mounted horizontally on this bracket 04), and the outer side of the bracket 04) A sliding piece αQaQ attached to slides along the guide plate (5) of the guide frame (2).

In addition, the water pipe (3) housed in the guide frame (2) opens at a water supply port (17) provided in the middle of the guide plate (5), and water is supplied from this water supply port α'7) to the excavation hole αB. The waste is sucked up in the pipe from the drain port 09 of the push-down pipe (10), and is discharged to the outside through a drain pipe connected to a pump provided on the ground surface.

Furthermore, the hydraulic piping (
4) is connected to a hydraulic unit (not shown) prepared on the ground surface, and its tip is further connected to a sliding piece drive motor Cυ(3) installed on at least one of the brackets 04).

The hydraulic cylinder (7) is also supplied with oil from the aforementioned hydraulic unit.

Since the present invention is as described above, a pair of left and right guide installation holes fil (1, 1) are excavated in advance in the ground, and a guide frame +2 (+21) is built therein.

During this installation, the tip of the guide frame f2+ +2) is sharp, so the guide installation hole [1,) (1
) The tip of the guide frame can be inserted further into the soil from the bottom to stabilize the guide frame.

Attach the upper and lower horizontal frames (6) αυ to the guide frame (21 (2+) exposed on the ground, and attach the hydraulic cylinder (71 (71) to the hydraulic cylinder (71 (71)
Attach the push-down tube ae to the push-down plate (9) attached to the piston rod (8) +8+. A guide frame (bracket 04 with two rotary bits attached that can be lowered along 21+21) is provided in advance at the tip of the push-down tube OC.

Thus, the hydraulic piping in the guide frame (2+ +21)
4) Supply oil to the drive motor eυ installed on the sliding piece aO through (4) When the motor is driven with oil, the rotary bits α rotate and excavate the ground Q between the holes tl) and tl). become. At this time, water is supplied from the water pipe (3) into the hole α barrel to facilitate excavation. Excavated items are pushed down with water 0■
It is sucked up inside and discharged outside.

Then, if the length of the push-down pipe α is insufficient depending on the excavation depth, an auxiliary push-down pipe a is spliced.

Also, by pressing down O5, the drive motor Q11
The hydraulic pipe (4) will also be stretched as it moves down.

Therefore, the part connecting the hydraulic pipe (4) and the drive motor is arranged so that it can move along a guide hole provided in a guide plate (5), not shown.

In addition, drainage may be drained by dropping a drain pipe connected to the pump into the hole 08 without using the push-down pipe. In such a case, the push-down pipe αQ can be used to provide hydraulic piping for the drive motor e11.

As the rotating bit, those shown in FIGS. 3(a), 3(b), and 3(c) are used.

The one shown in Fig. 4 shows a simple case of the excavation method, and the guide frame + 2) (2+ is fixed by holding down the guide frame (21F21) from the top with a weight body (C). .

(C) is a guide adjustment device, which is installed on one or both sides of the guide.

[Brief explanation of the drawings] Fig. 1 is a front view showing the first embodiment of the method of the present invention, Fig. 2 is a cross-sectional view of the same, and Fig. 3 shows various types of rotating bits. The front view and FIG. 4 are cut front views showing a second embodiment of the construction method of the present invention.

Claims (1)

[Claims] A guide frame is installed in a pair of left and right guide installation holes that have been drilled in advance, and then a rotating bit is stretched between the guide frames and moved in the longitudinal direction of the hole along the guide frame to perform preliminary drilling. An excavation method that excavates the ground between the drilled holes.