JPS5952098A - Device for burying pipe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly directed to a management and installation device for burying small diameter pipes.

Currently, as a construction method for burying small-diameter pipes 1, for example, pipes with a diameter of 800 mm or less, the single-angle construction method has become mainstream instead of the conventional cut-and-cover construction method. This propulsion method installs a 411iA @ means, such as a hydraulic cylinder, in the starting shaft,
The oil [E] is used to press the rear part of the buried pipe and push the buried pipe into the ground while compacting the ground in front of the buried pipe.

However, this propulsion method is particularly considered to be a consolidation method.

This consolidation method simply pushes the rear part of the buried pipe to I41 using a hydraulic cylinder, so a large amount of resistance is exerted between the other pile and the buried pipe, and this creates a huge force as a propulsion force. Moreover, since a large force is applied to the buried pipe, the buried pipe is easily damaged, and the buried pipe is also easily displaced from the place in which it should be buried, resulting in poor directional accuracy.

Therefore, the rotary excavation method in the propulsion method, in which the underground pipe is propelled and buried using a hydraulic cylinder while excavating the ground using a single-rotation excavation tool, has been newly developed and used in the rotary excavation method. V immediate installation device (patent application 1984-1017)
30 @) was proposed first.

As shown in FIG. 5, this management equipment includes a hydraulic cylinder 3 as a propulsion means and a rotary excavator sounding and viscosity imparting liquid supply section 20 in the starting shaft 2.

- F. A rotary cutting tool 7 is rotatably supported at the front of the excavator main body 6, and the +a cutting blade 10. 1 piece 14 is provided. A front part of a buried pipe 4 having an outer diameter smaller than the outer diameter of the rotary excavator 7 is connected to the rear part of the excavation rock main body 6.

The rear part of the buried pipe 4 is brought into contact with the hydraulic cylinder 3. Inside this buried pipe 4 is a drilling tool rotating shaft and viscosity imparting liquid supply pipe 2.
1, and both ends of the excavation tool rotation 11i111 and viscosity imparting liquid supply pipe 21 are connected to the rotary excavation tool 7 and the same rotary excavation tool drive section and viscosity imparting liquid supply section 20, respectively. An IE force holding frame 17 for holding 1 mo of earth and sand is provided in an annular gap 18 formed between the excavated hole on the side of the starting shaft 2 and the buried pipe 4, and an earth discharge port 22 is provided in the pressure holding frame 17. establish.

Next, the operation of the management equipment configured as shown in 1E above will be explained. First, the rotary excavating tool 7 is rotated by turning on the driving operation source of the cutting tool small moving part and viscosity imparting liquid supplying part 20 for one rotation,
While cutting the ground 1 four times with the bending blades 10 and 11 of the rotary excavation tool 7, a viscosity imparting liquid is injected from the injection port 14 of the rotary excavation tool 7, and the injected viscosity imparting liquid is and the excavated earth and sand (1υ stirring blades 12, 1 of the rotating excavator 7)
3 to produce a viscous liquid mixed earth and sand 19.

At this time, the outer diameter of the rotation one bend cutting tool 7 is Jll! Since the diameter is larger than the outer diameter of the installed pipe 4, an annular gap 18 is formed between the hole drilled 10 times on the other side and the buried pipe 4.

For this reason, the rotation (the viscous liquid mixed earth and sand generated in the vicinity of the cutting tool 7) 9 is caused by the pressure of the viscosity imparting liquid injected from the injection port 14 and the propulsive force of the hydraulic cylinder 3.
The pressure is reduced, and the soil is discharged from the discharge port 22 of the pressure holding frame 17 to the starting shaft 2 through the outer circumference of the scoop M rock body 6 and the annular gap 18. On the other hand, at the same time as the above-mentioned excavation of the earth 1, the hydraulic cylinder 3 is extended to propel the buried pipe 4.

When the hydraulic cylinder 3 reaches the stroke end,
By contracting the hydraulic cylinder 3, connecting a new buried pipe d4 in the starting q well 2, and carrying over the above-mentioned operation 1-, the buried pipe 4 can be installed in the 111Q order. In addition.

9 in the figure is a direction forward jack.

In this way, the above-mentioned pipe hammering equipment (k; H, excavator main body 6
Since the ground 1 is excavated in the front part of the ground to create a viscous mixed top sand, the resistance of four people is reduced, and [2]
Since the rod-shaped gap 18 between the pipe 4 and the pipe 4 is filled with earth and sand mixed with a viscous liquid, the frictional resistance between the pipe 4 and the pipe 4 is reduced. Therefore.

Compared to the consolidation method, it is possible to reduce the driving force applied to the buried pipe 4, and since the force acting on the buried pipe 4 is small, damage to the buried pipe 4 is extremely reduced, and the directional accuracy is improved. There are effects such as being

However, since the above-mentioned management equipment discharges the viscous liquid-mixed earth and sand 19 into the starting shaft 2 through the annular gap 18, if a large number of buried pipes 4 are added and the circulation distance becomes long, the viscous liquid-mixed earth and sand will be discharged. When the viscous liquid mixed earth and sand 19 passes through the annular gap 18, the resistance force applied to the viscous liquid mixed earth and sand 19 increases. 1
Me1- is the king? There is a problem in that a certain amount of propulsive force is required, even if the thrust force is not greater than that of a similar type.

Invent this invention, between the above! JMAK The purpose of this project is to provide a management equipment that can bury underground pipes without increasing the propulsion force even if the excavation distance becomes long.

The present invention provides a drive unit for a rotary excavator in the excavator main body,
The rotary excavator is connected to the first drive part, and a soil discharge means is provided in the buried pipe, and the viscous liquid mixed earth and sand is taken into the buried pipe, passed through the buried pipe, and discharged to the starting shaft. It is characterized by

An embodiment of the management facility of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, the same reference numerals as in FIG. 5 indicate the same parts.

7-1-In the management installation device of the present invention in this embodiment, the drive unit 8 of the rotary excavator 7 is installed in the excavator main body 6, and the rotary excavator is attached to the rotation shaft 23 of the drive unit 8. Install 7. The rotating shaft 23 of this drive unit 8 is formed in a hollow shape, and the tip of this rotating shaft 23 is linked to the injection port 14, and a swivel joint 24 is connected to the rear end of the one-rotating shaft 23. At first, connect the tip of the viscosity imparting liquid supply pipe 25 to the top I7, then connect the viscosity imparting liquid supply pipe 25 to the inside of the connecting pipe 5 and the buried pipe 4.
The base is connected to a viscosity imparting liquid supply unit (not shown) installed on the ground. A connecting pipe 5 is connected between the excavator main body 6 and the buried pipe 4.

A pressure pump 15 as a means for discharging earth and sand is installed in this connecting pipe 5, and the tip of the earth and sand discharge pipe 26 is connected to the pressure pump 15. Or a soil disposal unit installed above ground (not shown)
A pressure detector 16 is provided near the earth and sand suction port of the pressure pump 15. A passage through which the viscous liquid mixed earth and sand 19 passes is provided in the area between the direction adjustment jacks 9 on the outer periphery of the excavator main body 6. 27. Note that the outer shell t/ of this passage 27 is
'i It may or may not be present as shown in FIG. 3.

The management equipment of the present invention in this embodiment has the following configuration, hereinafter referred to as ff-4J, +K.
Explanation 1-1.

First, when the drive unit 8 is driven, the rotary excavation tool 7 rotates, and this rotation (the excavation blade 10.11 of the bending tool 7
Power 5 drilled. On the other hand, the viscosity imparting liquid is supplied through the viscosity imparting liquid supply pipe 25. Swivel join) 24 is injected from the injection port 14 through the rotating shaft 23 of the IIK moving part 8, and this viscosity imparting liquid and earth and sand are stirred and mixed by the stirring blades 12 and 13 of the rotary excavation tool 7 to form a viscous liquid mixed earth and sand. generated. This viscous liquid mixed earth and sand 1. It is transferred rearward by the injection pressure of the viscosity imparting liquid injected from the injection port 14 and the propulsive force of the oil field cylinder 3. Namely.

Passage 275 of the excavator body 6: Pass through to fill the annular gap 18. At this time, since the linear gap 18 on the side of the first starting shaft 2 is closed by the pressure holding frame 17, the annular gap 1
The earth and sand pressure in 8 increases as the viscous liquid mixed earth and sand 19 is filled. 2.The above-mentioned earth and sand pressure is measured by the pressure detector 16, and when it reaches a predetermined pressure, the viscous liquid mixed earth and sand 19 is taken in by the pressure pump 15 and buried.
f It is discharged to the starting shaft 2 through the earth and sand discharge pipe 26 in J. Further, when the earth and sand pressure in the annular gap 18 becomes lower than a predetermined pressure, the discharge of the viscous liquid mixed earth and sand 19 is temporarily stopped. In this way, the buried pipes 4 can be buried one after another, and the viscous liquid mixed earth and sand 19 is not discharged into the starting shaft 2 through the annular gap 18, but is taken into the buried pipes 4. Launch through the buried pipe 4＼γ Pit 2
Therefore, even if the excavation distance becomes long, the viscous static mixed earth and sand only passes through the earth and sand discharge pipe 26 in the buried pipe 4, and has no relation to the PT cell overresistance in the annular gap 18. ,Therefore, there is no necessity to increase the propulsive force. Furthermore, 1
Since the drive part 8 of the rotary excavator 7 is provided in the monthly difference machine main body 6,
There is no need to pass the rotating excavator 11411 through the buried pipe 4. Therefore, it is possible to provide earth and sand discharge means, which includes the evacuation pump 15 and the earth and sand discharge pipe 26, within the buried pipe 4 accordingly.

In addition, the viscosity imparting liquid is mainly composed of #III granular soil.]
When the soil is mainly composed of coarse grained soil, a bentonite bath solution is used.

As is clear from the above examples, the management equipment of this study is configured to take viscous liquid mixed earth and sand into a buried pipe and discharge it through the buried pipe into a starting shaft, etc. Because there is (:d) There is no need to increase the propulsive force even if the advancing distance NIL increases / ζ effect.Furthermore, the drive part of the rotation 1 bending tool is installed in the r bending & warming main body. Therefore, there is no need to declare the rotation axis of the excavating tool inside the buried α.
Accordingly, earth and sand discharge means can be provided within the JIJi facility.

[Brief explanation of drawings]

Figures 1 to 4 show one embodiment of the management equipment of the present invention. Figure 1 is a sectional view, Figure 2 is an enlarged sectional view of four parts, and Figure 3 is an enlarged sectional view of four parts.
1゛q and chant 41 are IJI in 21.41
-11T line 1. teOI'i Figure 16 and IV-IV
In the line cross-sectional view, Ll). FIG. 5 is a sectional view of a conventional green tapping device. ■... Sodeyama, 2... Starting shaft 53... Hydraulic cylinder. 4... Burying agency, 5... 1 Hakama continuation pipe, 6... Excavation machine body, 7... Rotating excavator, 8... Drive unit, 14...
Inlet, 15--Pressure pump, 16--Earth force generator, 17--Royal force holding 7 body, 18--Annular gap, 1
9...Viscous liquid mixed earth and sand, 23...11 rotation axis, 24.
... Swivel joint, 25 ... Sticky J liquid 1J
1. Supply r, 26... Sediment discharge pipe. Patent Applicant: Nippon Electric Telephone Public Corporation Hitachi Construction Machinery Co., Ltd. Representative Patent Attorney Tadashi Akimoto Continued from page 1 (Inventor: Naoki Miyanagi Hitachi Construction Machinery Co., Ltd. Tsuchiura Factory, 650 Kandate-cho, Tsuchiura City) Applicant Hitachi Construction Machinery Co., Ltd. 2-6-2 Otemachi, Chiyoda-ku, Tokyo

Claims (1)

[Claims] 1. A rotary excavator is rotatably supported at the front part of the excavation machine body, and an injection means for injecting a viscosity imparting liquid into the excavated earth and sand is provided on the rotary excavator, and an injection means is provided at the rear of the excavation machine body. Connecting the front part of a buried pipe whose outer diameter is smaller than the outer diameter of the rotary excavation tool, bringing the rear part of the buried pipe into contact with a propulsion means installed in the starting shaft, and rotating the rotating → bending tool. While excavating the ground,
The viscosity-imparting liquid is injected from the injection means to mix the excavated earth and sand with the viscous liquid mixed earth and sand, and the viscous mixed earth and sand is transferred backward through the outer periphery of the excavator main body. The annular gap formed between the buried pipe and the viscous liquid mixed earth and sand is filled with the viscous liquid mixed earth and sand.
In the management installation device for burying the buried pipe by propelling the digging machine main body and the buried pipe, a moving part of a rotary excavating tool is provided in the excavating machine main body, and the moving part of the rotating drilling tool is provided in the sliding part. , while providing earth and sand discharge means in the buried pipe,
The viscous liquid mixed earth and sand was taken into the buried pipe and the inside of the buried pipe was
A management installation device, characterized in that it is configured to discharge the fuel into the starting shaft. 2. The annular gap formed between the excavated hole on the starting shaft side and the buried pipe has a pressure holding frame that holds the earth and sand pressure, and an output detector that detects the earth and sand pressure is installed near the earth and sand discharge means. Claim 1, characterized in that the structure is configured to maintain the soil strength of the viscous liquid mixed earth and sand in the annular gap at a predetermined level or more.
Management equipment as described in section.