JP3123643B2 - Submerging start shaft using excavator with stirring blades and joining method to buried sewer main - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction method for connecting a new installation pipe to a sewage main pipe buried underground, and more particularly to a method for installing a starting shaft from the surface of the ground to the buried main pipe. It is related to the improvement of the work. (See Patent Application No. 1077783 in 1996)

[0002]

2. Description of the Related Art In a conventional excavation of a starting shaft by manual excavation, there is the following embodiment, and the procedure will be described below. 1. When using a circular split-assembled steel formwork (see FIGS. 13 and 14) (1) Excavation by human power is sufficient to accommodate the first-stage formwork. (2) Assemble the first-stage formwork divided into two or three in a circular manner with bolts. (3) Excavation is manually performed at the lower end of the first-stage formwork so as to accommodate the second-stage formwork. (4) Assemble the second or third divided formwork in a circular shape with bolts. (5) Excavation is manually performed at the lower end of the second-stage formwork so as to accommodate the third-stage formwork. (6) Assemble the third-stage formwork divided into two or three with a bolt in a circular shape. (7) At the lower end of the third-stage formwork, a gap is just excavated by human power to accommodate the fourth-stage formwork. (8) Assemble the second or third divided formwork with circular bolts. (9) From the opening of the fourth stage form, a short horizontal sheath is being propelled while being connected by welding. 2. When using H steel piles and wooden earth retaining plates (Fig. 15, Fig. 1
(See 6) (1) H steel piles are driven into the starting shaft at four locations using a driving machine. (2) Excavation by human power is enough to accommodate the first-stage earth retaining plate. (3) The first-stage earth retaining plate is installed between the H steel plate and the H steel pile. (4) Excavation is manually performed at the lower end of the first-stage earth retaining plate so that the second-stage earth retaining plate can fit therein. (5) Excavation to a predetermined depth and installation of a retaining plate are repeated in the same manner as described above, and a short steel pipe is propelled from the opening of the pipe in a horizontal direction while being connected by welding.

[0003]

The conventional starting shaft construction method has the following problems. (A) Since the mold is an assembly by bolts or installation of a retaining plate, water is easily leaked from the joints of the mold and the mold, so that a large amount of labor and cost is required for the water stopping operation. (B) Since the excavation is performed manually, the construction period is long and labor is large. (C) When installing the formwork, there is a risk that a gap will be created between the formwork and the ground due to extra excavation of the ground, which may lead to sinking of the road surface. ▲ d ▼ Wooden earth retaining plates are not suitable for deep places because of the large amount of deflection due to earth pressure and easy deformation. (E) When water accumulates in the excavation pit, the soil on the back of the formwork becomes loose and the ground surface sinks. ▲ F ▼ Vibration noise is generated when driving H steel piles, which may cut or damage obstacles such as underground buried objects. ▲ G ▼ It takes a long time to connect the horizontal tubing and pipes by welding, and it is difficult to accurately propel in the straight direction when bending and welding.

[0004] The present invention has the above-mentioned problems (A).
▲ b ▼. ▲ c ▼. ▲ d ▼. ▲ e ▼. ▲ he ▼. ▲ G ▼)
The goal is to provide a solution to the problem.

[0005]

The above object can be achieved by the following method.

[0006] With regard to (a), water leakage can be prevented by using a form-shaped or putty-shaped seal at the time of screwing in the form joint of this method.

[0007] For (ii), the excavator equipped with the stirring blades of the method is used for excavation and then discharged to the ground with a suction hose, thereby shortening the construction period and reducing labor. .

[0008] With respect to (c), by using the sinking vibrator of this method together when excavating and discharging earth and sand inside the outer pipe, the gap between the ground and the ground is eliminated. To prevent the settlement of the road surface.

Regarding (d), since the outer pipe used in the method is a steel pipe even when used in deep places, it does not bend due to earth pressure.

[0010] Regarding (e), even if water remains in the excavation pit, the joint of the outer pipe of this method is excellent in water tightness, and there is a gap between the outer pipe and the ground. Not for
The settlement of the ground surface due to loosening of earth and sand can be prevented.

[0011] With regard to (iv), since the method is not driven by the method, almost no vibration noise is generated. In addition, prior to excavation and subsidence of the outer pipe, an obstacle in the ground is confirmed using a high-pressure water jet exploration pipe, so that it is safe without damaging the buried object. ▲ G ▼ Since the connection of the horizontal sheath and the pipe is made by screw connection, it can be connected in a short time, and can be accurately propelled in the straight traveling direction and connected to the main pipe.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. In the embodiment shown in FIG. 1, the first outer tube (6) is fixedly mounted on the outer tube fixing pillar (5).

In the embodiment shown in FIG. 2, an obstruction is confirmed by penetrating a high-pressure water jet probe (12) into the ground.

In the embodiment shown in FIG. 3, an excavator provided with a stirring blade of this method is suspended inside a first-stage outer tube of a starting shaft.

In the embodiment shown in FIG. 4, the earth and sand inside the first shaft outer pipe (6) of the starting shaft is excavated by an excavator provided with stirring blades, and the high pressure water scouring pipe (21) and the suction hose are used together. , Has been discharged to the ground.

In the embodiment shown in FIG. 5, the starter shaft second stage outer tube (27) is rotated clockwise by human power using a rotating lever rod (30) screwed into the outer tube to rotate the starter shaft outside the first stage. The pipe (6) is screwed.

In the embodiment shown in FIG. 6, the first shaft outer tube (6) and the second shaft outer tube (27) of the starting shaft are screwed together.
Is settled using an excavator provided with a stirring blade (17) of the method, a suction hose (20), a high-pressure water scouring pipe (21), and a settling vibrator (22).

In the embodiment shown in FIG. 7, the horizontal sheath of the submerged first shaft outer tube (6) is opened (31).
A high-pressure water probe (29) is used to inject a high-pressure water (14) using a horizontal screw connection type high-pressure water exploration pipe to check for any obstacles in the ground in the propulsion direction.

In the embodiment shown in FIG. 8, a horizontal rotary press-fit thruster (39) is used to sequentially connect horizontal sheaths (43), (35), and (34) having screw-type joints to propel. ing.

In the embodiment shown in FIG. 9, the soil in the propelled horizontal pod is scoured and discharged by using a horizontal screw connection type high pressure water exploration pipe (29) and a suction hose (20). It is carried out.

In the embodiment shown in FIG. 10, a sheath pipe is propelled from a submerged outer pipe and joined to a sewage main pipe.

In the embodiment shown in FIG. 11, the female thread (44) of the first shaft of the starting shaft and the male screw (27) of the second shaft of the starting shaft are joined.

[0023]

Since the present invention is configured as described above, it has the following effects.

By using a steel pipe as the formwork of the starting shaft and screwing the joint portion, deflection due to earth pressure can be eliminated, and water leakage from the joint portion can be prevented by a seal.

Since excavation is carried out by an excavator provided with stirring blades at the same time, the earth and sand is muddy with high-pressure water, and the earth and sand are discharged to the ground using a suction hose.

Further, since the submerged vibrator is installed at the top of the outer shaft of the starting shaft, the submerging time can be shortened.

Further, since the sediment around the starting shaft can be laid without extra excavation by using the sinking vibrator, there is no gap between the outer peripheral surface of the outer tube and the ground. The settlement of the ground surface due to loosening of earth and sand can be prevented.

Before starting the excavation of the starting shaft, the obstacles in the ground are confirmed using the high pressure water jet probe.
It can be safely laid without damaging the buried objects and the like.

Since the joints of the pipes in the horizontal direction are welded without welding, they can be propelled quickly and without any bending while ensuring straightness.

[Brief description of the drawings]

FIG. 1 is an overall cross-section showing an embodiment in which a first-stage outer tube of a starting shaft according to the present invention is installed on a fixing jig using a hanging tool.

FIG. 2 is an overall cross-sectional view showing an embodiment of the present invention in which an obstacle in a ground before excavation is searched with high-pressure water.

FIG. 3 is an overall cross-sectional view showing an embodiment in which an excavator provided with a stirring blade of the present invention is installed using a hanging tool in a first-stage outer pipe of a shaft.

FIG. 4 shows an embodiment in which a sinking vibrator is installed at the top end of the outer tube of the first stage using an excavator provided with stirring blades of the present invention, and excavation and sinking are performed using high-pressure water and a suction hose. It is a whole sectional view showing an example.

FIG. 5 is an overall cross-sectional view showing an embodiment in which a second-stage outer tube is installed on the first-stage outer tube of the present invention, and the outer tube is screwed together by using a rotating lever for screwing the outer tube; .

FIG. 6 is an overall cross-sectional view showing an embodiment in which a second-stage outer pipe is submerged using a vibrator high-pressure water and a suction hose using an excavator provided with a stirring blade according to the present invention. .

FIG. 7 is an overall cross-sectional view showing an embodiment in which the presence or absence of an obstacle is confirmed using a joint-type high-pressure water exploration pipe before the mounting pipe from the starting shaft to the main pipe is horizontally propelled. is there.

FIG. 8 is an overall sectional view showing an embodiment of the present invention in which a sheath tube for joining to a mounting pipe is propelled from a sunk starting shaft to a main pipe using a pressurizing rotating device.

FIG. 9 is an overall cross-sectional view showing an embodiment of the present invention in which earth and sand in a sheath propelled toward a main pipe is discharged to the ground using high-pressure water and a suction hose.

FIG. 10 is an overall view of a sheath pipe, an outer pipe, and a sewer pipe.

FIG. 11 is a detailed enlarged view showing an embodiment of the screwed joint portion of the starting shaft according to the present invention.

FIG. 12 is a detailed enlarged view showing an embodiment of a threaded joint part of a sheath pipe for joining a mounting pipe from a starting shaft to a main pipe according to the present invention.

FIG. 13 is a plan view of a conventional starting shaft using a circular split-assembled steel formwork formed by manual excavation.

FIG. 14 is a cross-sectional view of a conventional start shaft using circular split-assembled steel made by manual excavation.

FIG. 15 is a plan view of a starting shaft using an H steel pile and a wooden retaining plate obtained by conventional manual excavation.

FIG. 16 is a cross-sectional view of a starting shaft conventionally using an H steel pile and a wooden formwork by manual excavation.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ground 2 Ground surface 3 Starter shaft outer tube fixing stand 4 Pressurized jack 5 Outer tube fixing leg 6 First starter shaft first stage outer tube 7 Grasping machine 8 Starter shaft outer tube hanging cross beam 9 Suspension bracket 10 Suspension hook 11 Rotating shaft 12 High pressure water injection probe 13 High pressure hose 14 High pressure water 15 Rotation axis 16 Drilling spiral blade 17 Stirrer blade 18 Hydraulic motor 19 Hydraulic hose 20 Suction hose 21 High pressure water scouring pipe 22 Sinking vibrator 23 Suspension fitting 24 Power cord 25 Injecting excavated earth and sand Sediment muddy with water 26 Excavated sediment 27 Starter shaft second stage outer tube 28 Starter shaft first and second stage screw-in joints 29 Horizontal screw connection type high-pressure water exploration tube 30 Lever for outer tube screwing Rod 31 Horizontal sheath pipe opening 32 Start shaft 3rd stage outer tube 33 2nd and 3rd stage screw-type joints of start shaft 34 Horizontal 3rd Sheath tube 35 Horizontal second sheath tube 36 Horizontal second and third sheath tube threaded joint 37 Fixed plate 38 Horizontal rotary press-fit thruster mount 39 Horizontal rotary press-fit thruster 40 Propulsion reaction plate 41 Hydraulic pressure Hose 42 Threaded joint of first horizontal sheath and second sheath pipe 43 Horizontal first sheath of pipe 44 Enlarged view of female thread joint of first stage outer tube of starting shaft 45 Second stage outer tube of starting shaft Enlarged view of the joint part of the horizontal first sheath pipe female thread 47 Enlarged view of the horizontal second sheath pipe male thread joint part 48 Joint view of the horizontal second sheath pipe female thread Enlarged view of 49 49 Enlarged view of the joint part of the male screw of the first sheath in the horizontal direction 50 Screw joint part 51 First-stage circular split-assembly form 52 Second-stage circular split-assembly form 53 53 Third-stage circular Split assembly Frame 54 Fourth-stage circular split-assembly form 55 Vertical assembly bolt for circular split-assembly form 56 Vertical assembly bolt for steel plate for circular split-assembly form 57 Horizontal assembly of circular split-assembly form Bolt tightening steel plate 58 Horizontal assembly bolt of circular split-assembly form 59 Horizontal assembly joint of circular split-assembly form 60 Drilling hole for assembling circular split-assembly form 61 Circular steel formwork 62 Vertical joint of circular split-assembly form 63 Vertical assembly bolt of circular split-assembly form 64 Conventional H steel pile and H steel of starting shaft using wooden earth retaining plate Anti-65 First wooden retaining plate of starting shaft using conventional H steel pile and wooden retaining plate 66 Second wooden retaining plate of starting shaft using conventional H steel pile and wooden retaining plate 67 Conventional H Starting shaft using steel pile and wooden earth retaining plate The fourth stage wooden retaining plate of the starting shaft using the conventional H steel pile and the wooden retaining plate 69 The excavation hole for installing the retaining plate 70 The retaining plate 71 Overall view of the sheath pipe 72 Outside Overall pipe 73 Sewage main 74 Road surface

Claims (5)

(57) [Claims] 1. A sewage pipe (or mounting pipe) is newly connected to a sewage main pipe buried underground, a starting shaft for joining an installation pipe is sunk, and a sewage main pipe buried beforehand underground is newly installed. In the construction method to perform The starter shaft first stage outer tube (6) is erected on the outer tube fixing pedestal (5) using the gripper (7) and fixed with the pressure jack (4). 2. Ground surface (2) inside the first shaft outer tube (6) of the starting shaft
Then, from the tip of the high pressure water jet (12),
4) Inject while penetrating to check for the presence of obstacles in the ground. 3. An excavator equipped with stirring blades is hung using a hanging metal fitting (9) and a hanging hook (10) inside a first shaft outer pipe (6) of a start shaft having an inner diameter of about 1.0 m which can be operated in the pipe. Installation. 4. At the same time as drilling the ground (1) by rotating the drilling spiral blade (16) and stirring blade (17) installed on the same rotation axis,
High pressure water scouring pipe (21) is used together to mix with water, muddy earth and sand is discharged to the ground with suction hose (20). At this time, a sinking vibrator (22) is placed on the top end of the outer pipe of the starting shaft to accelerate the sinking of the outer pipe. 5. The starter shaft second stage outer tube (27) is placed on the top end of the starter shaft first stage outer tube (6), and the outer tube is screwed by human power using an outer tube screw-in rotation lever (30). Turn the plug-in joint clockwise to connect. 6. The starter shaft second stage outer pipe (27) is laid down in the same construction procedure as in the above steps 3 and 4. 7. According to the method, a horizontal screw connection type high-pressure water exploration pipe (29) penetrates in the propulsion direction from the horizontal flank and the pipe opening (31) of the first shaft outer pipe (6) sunk to a predetermined depth. To check for obstacles. 8. Using the horizontal rotary press-in propulsion device (39), the horizontal sheath is installed on the fixed platen (37), and the short sheath having a threaded joint is sequentially connected and propelled. 9. With the propulsion, sediment remaining inside the pod
The muddy water is formed using a horizontal screw connection type high-pressure water exploration pipe (29) and discharged to the above-ground part with a suction hose (20). 10. After the propulsion removal of the sheath, the drill is inserted horizontally into the sheath and the main pipe is drilled to join the mounting pipe. A method of submerging a starting shaft and connecting it to a buried sewage main using an excavator equipped with stirring blades characterized by the above features 2. A joint part (28) (33) of a starting shaft outside pipe.
2. A starter using an excavator with a stirring blade according to claim 1, wherein a band-shaped or putty-shaped water-stopping agent is applied to the threaded joint (50) of the joint portion (36) (42) of the horizontal sheath. How to lay down shafts and join them to buried sewage mains 3. A drilling spiral blade (16) and a stirring blade (17).
Using a drilling agitator equipped with the same rotating shaft (11),
A method for submerging a starting shaft and connecting it to a buried sewage main pipe using an excavator having a stirring blade according to claim 1. 4. The outer tube of the starting shaft (6) (27) (32)
2. A starting machine using an excavator equipped with a stirring blade according to claim 1, further comprising: installing a submerged vibrator at the top end of the outer tube to facilitate the demounting by vibrating at the time of attaching and detaching the threaded joint. How to lay down shafts and join them to buried sewage mains 5. A joint for a horizontal sheath (36) (4).
2. A method for submerging a starting shaft and connecting it to a buried sewage main pipe using the excavator equipped with a stirring blade according to claim 1, wherein 2) is a threaded joint.