JPS60226997A - Pipe propelling and embedding apparatus - 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 relates to an improved and novel apparatus for propelling and burying pipe bodies (eg, hume pipes, steel pipes, etc.) underground.

Traditionally, when burying small-diameter pipes such as sewage pipes, the open-cut method was used, which caused traffic obstruction, noise, vibration, and other pollution. However, a construction method has been adopted in which the pipe is propelled and buried in this horizontal shaft, and various devices are known to carry out this construction method (Japanese Patent Laid-Open No. 51-31017, No. 52-33313, Utility Model Application No. 52-33313, Publication No. 53-40007, etc.).

Earth removal auger sleeve used in these known devices +7. - are all made by fixing strips around a straight core at a constant pitch and storing them in a casing. For example, if relatively large gravel is present in the excavated ground, Not only does it become difficult to transfer the material to the end, but it also sometimes ends up damaging the auger screw.
It may even become unusable, and furthermore, gravel and the like collect at the tip of the excavation, making it impossible to propel it.

On the other hand, attempts have been made to provide a gravel crushing member such as an abacus bead at the tip, but depending on the type of gravel, it may not be possible to reliably crush the gravel, and this cannot be said to be sufficient.

In other words, the size of gravel that can be transported using conventional auger-free methods is approximately equal to the space volume formed by the pinch of the auger screw and the gap between the casing to which the screw is attached and the screw core. The size of the gravel is limited to a size that matches the size of the stone, and if the size of the gravel is larger than this, there are various disadvantages as described above.

Therefore, the inventor of the present invention completed the present invention by carrying out improvements through intensive research and on-site implementation for the purpose of eliminating the above-mentioned drawbacks of the conventional technology. An earth removal mechanism is inserted and supported inside the earth removal mechanism, a device for rotating the earth removal mechanism is operatively linked to the rear end of the earth removal mechanism, and a buried pipe connected to the leading pipe and a rear end of the earth removal mechanism. In a pipe-propelled burying device in which a device for burying soil is operatively linked, the soil removal mechanism is formed by fixing a continuous spiral member to the inner wall surface of a cylindrical body for soil removal. Features.

Hereinafter, the apparatus according to the present invention will be explained in detail based on the accompanying drawings.

Figure 1 shows the earth removal mechanism (
FIG. 2 is a cross-sectional view of the earth removal screw (FIG. 2). In the figure, 1 is a cylindrical body for soil removal, and 2 is a spiral member.

As is clear from FIGS. 1 and 2, this earth removal screw has a spiral member having an arbitrary width fixed to the inner wall surface of an earth removal cylinder 1 at an arbitrary pitch.

There is no particular restriction on the width (a) of this spiral member 2, and it may be quite small or wider than the radius of the earth removal cylinder 10, and this width should be adjusted to suit the buried ground. It is determined as appropriate depending on the size of the gravel to be collected, but it goes without saying that it will vary depending on the diameter of the cylindrical body l for soil removal.

For example, when the earth removal cylinder 1 has an inner diameter of 350wIIφ and the size of the gravel is 75mm or more, the width (a) of the spiral member is 50 to 200, preferably 75 to 150.
The quality is good.

Further, the pitch (b) of the spiral member 2 is also arbitrary as described above. This pitch Φ) is generally determined by the type of buried ground, the width (a) of the spiral member 2, the inner diameter of the earth removal cylinder l, the rotation of the earth removal cylinder, etc. When the inner diameter of the clay cylinder 1 is 350 mφ and the width of the spiral member 2 is approximately 100 cm, the number of containers is approximately 100 cans.

Next, FIG. 3 shows a tubular body propulsion burying device equipped with the above-mentioned earth removal screw.

In the figure, 11 is a leading pipe for horizontal shaft excavation, a protection pipe 12 is connected to the rear end of the leading pipe, and a buried pipe body (for example, a humid pipe, a steel pipe, etc.) 13 is connected to the rear end thereof. There is. In the leading pipe 11, protection pipe 12, and buried pipe 13, an earth removal screw 10 is inserted and supported by a casing 14, and the screw 10 and the casing 14 can be replenished at the rear end as the excavation progresses, which will be described later. It looks like this.

In the same drawing, a structure in which the earth removal screw 10 is inserted and supported in the casing 14 is shown, but if the screw can be rotated concentrically, for example, the earth removal screw +7 --10 Discharge/\ The structure may be such that the soil cylindrical body 1 is supported and fixed, and there is no particular restriction on the manner in which the soil discharge screw 10 is supported.

15 is a cutter head provided at the tip of the earth removal screw 10.

On the outer circumferential track portion of the head 15, a leading actuating portion having a rudder plate 16 oriented in the excavation direction is provided on the leading pipe 11.
Each pipe is connected to a hydraulic cylinder jack 17 which is fixedly held at a central angle part of 90° inside the pipe, and the operation of the cylinder jack 17 swings the leading pipe 11 provided with the rudder plate 16 vertically and horizontally. This is so that it can be done.

The rudder plate 16 has the function of guiding the forward direction of the leading pipe 11 in the earth and sand around the horizontal shaft excavated by the cutter head, and of preventing the leading actuating section from rolling.

17 is a drive section of the mechanism described above, 18 is an electric motor,
19 is a speed reducer, 20 is an excavation earth discharge port, 21 is a propulsion hydraulic cylinder, 22 is a hydraulic operation panel, 23 is a surveying instrument, 24
25 is a power transmission cable, 25 is an electric hydraulic unit, and 26 is a hydraulic control panel for the jack, which are linked together to form a track (not shown) laid in the starting shaft 27.
It is mounted on a movable rack.

That is, the earth removal screw 10 is rotationally driven by the reducer 19 of the electric motor 18, and the leading pipe 11 and the protection pipe 12 are operated by operating the propulsion hydraulic cylinder 21 whose reaction force is received by the inner surface of the shaft from the operation panel 22. A driving section consisting of a pipe body consisting of a buried pipe body 13, a leading actuating section having a steering plate 16, an electric motor 18, and an operation panel 26 are configured to move together on a track in the excavation direction. Further, each hydraulic cylinder jack 17 is connected to the operation panel 2 via a hose.
6, and the jacks 17 can be operated individually by operating this operation panel 26.

On the other hand, a target 28 is provided at the inner upper part of the guide pipe 11, and a surveying instrument 23 is attached to the rear of the drive section.
These K allow confirmation and correction of deviations in the excavation direction.

When burying a pipe using the apparatus configured as described above, a starting shaft 27 is excavated and formed as shown in FIG. The excavation is carried out toward a reaching shaft that has been excavated.The electric motor 18 is driven, and the cutter head 15 at the tip of the earth removal screw 10 is rotated to excavate earth and gravel, and the excavated earth and sand are removed by the screw. The soil is transported rearward and discharged into the shaft 27 from the discharge port 20, and the cylinder 21 is operated by operating the operation panel 22, leading pipe 11, protection pipe 12, buried pipe body 13, Sufu IJ+--10 and drive unit. If the underground pipes 13 and screws 10 are added when the pipes are moved forward as one and the buried pipe bodies 13 and screws 10 are added after being propelled to a certain distance, it is possible to excavate the horizontal shaft and bury the buried pipe bodies at the same time.

During this work, if the target 28 is observed from the surveying instrument 23 and the lead pipe 11 starts to move in a direction different from the target, the difference in direction can be detected by operating the operation panel to determine the necessary direction within the cylinder jack 17. Push out only the object and adjust the direction of the leading actuator. By doing so, excavation and burying can always be carried out in a straight line easily.

Figure 3 shows an IJ for removing earth and sand after excavation.

- Although the structure shown is one in which the rear part is transported by the action of a screw that takes in from the opening at the tip, it is not limited to this. It can be changed as appropriate.

For example, as shown in FIG. 4(a), the earth removal screw 10
The distal end of the connecting member 3 is closed, and the connecting member 3 is attached to this distal end.
The cutter head 15 having one to several notches 31 is connected through the screw 0, and the cutter head 15 having one to several notches 31 is connected through the screw. There is no particular limitation on the shape, and it can be square, circular,
Form one to several of these geomorphic shapes. 3
4 is a water stop plate.

Further, a funnel-shaped member 32 that gradually expands toward the front is integrally joined to the tip of the casing 14.

The equipment shown in Fig. 4 can be used, for example, when excavating in the state shown in Fig. 4 (a) or (b), and on the other hand, when transporting earth and sand with a scree, ) or Φ). Of course, these may be adjusted as desired to prevent the tip face from collapsing.

In general, in sandy ground where the carrying capacity of the scree is large and contains a large amount of water, a large amount of water mixes with the excavated soil and enters the screw, making the ground at the tip of the excavation part more likely to collapse, and if it does not shift. In this case, a serious problem arises in that the leading pipe does not move straight and the direction cannot be adjusted freely.

As shown in Fig. 4, by installing a mechanism that can adjust the intake of excavated soil as appropriate, the amount of excavated soil taken in can be adjusted as desired, even if the excavated ground contains a large amount of water and is prone to collapse. The above-mentioned problems can be solved by performing excavation while adjusting and maintaining the balance of the face.

As explained above, according to the present invention,
- is a structure in which a continuous spiral member is fixed to the inner wall surface of the earth removal cylinder (in other words, the spiral member is not attached to five bars) Since it is not equipped with screws around it, 7.
Even if hard gravel of about 5 or more is included, the screw will not be damaged, the soil will not be difficult to transport, and the gravel will not collect at the tip, and the screw can be transported and discharged reliably. ■Also, the intended purpose can be achieved without attaching a gravel crushing member to the tip. (2) Therefore, the pipe body can be buried easily without being affected by the type of ground in which the pipe body is buried. ■It is possible to bury in a straight line by the action of the rudder plate installed on the leading pipe.

■By installing a protective pipe with a considerable length, it is possible to prevent damage to buried pipes such as Huyum pipes, and even if the direction of propulsion of the double lead pipe changes depending on the soil quality, it will not act on the lead pipe during correction. It is presumed that this is due to the fact that the bending stress is not directly applied to the buried pipe).

[Brief explanation of drawings]

FIG. 1 is a partially cutaway sectional view of the main part of the device of the present invention, and FIG.
3 is a schematic diagram of the entire device, FIG. 4 is a partial schematic diagram showing another embodiment, and FIG. 5 is a sectional diagram of the cutter head. 1... Cylindrical body for soil removal 2... Spiral member 10... Screw for soil removal 11... Lead pipe 12... Protective pipe 13... Buried pipe Body 14...Casing 15...Cutter head 16...Rudder plate 17...Cylinder 1 jack 18...Electric motor 19...Reduction machine 20... Excavation soil discharge port 21... Hydraulic cylinder for propulsion 27... Starting shaft Figure 1 Figure 2 Figure 4 (b) and entrance 33 10 2 Figure 6

Claims (6)

[Claims] (1) An earth removal mechanism is inserted and supported inside the leading pipe, the protection pipe connected to the rear end, and the buried pipe body connected to the rear end, and the earth removal mechanism is attached to the rear end of the earth removal mechanism to rotate it. In the pipe body propulsion burying device, the device is operatively linked, and a device for burying the burying pipe connected to the lead pipe and a device for burying the same is operatively linked to the rear end of the burying pipe and the dirt removal mechanism, and the earth removal mechanism is A tubular body propulsion burial device characterized by being formed by fixing a continuous spiral member to the inner wall surface of a cylindrical body (11). (2) The tube body propulsion burial device according to item 1, wherein the protective tube has a sufficient length so that the bending stress applied to the leading tube does not directly act on the buried tube body. (3) The pipe body propulsion burial device according to the above item 2, wherein the leading pipe is provided with a plurality of rudder plates. (4) The tubular body propulsion burial device according to item W, wherein the width of the helical member of the earth removal mechanism is smaller than the diameter of the earth removal cylindrical body. (5) The tubular body propulsion device according to item 3, wherein the leading actuator having each of the rudder plates is connected and supported by a hydraulic jack supported by the leading pipe. (6) A cylindrical body υ for soil removal to which the spiral member is fixed.
2. The tubular body propulsion burial device according to item 1, which is rotatably fitted into a casing having an inner diameter that substantially matches the outer diameter of the cylindrical body.