JPH0257601B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a structure in which a lining plate is attached to the top of an excavated shaft in a propulsion method in which a small diameter propulsion pipe such as a Huyum pipe is laid underground. Regarding.

[Conventional technology and its problems]

Conventionally, various types of propulsion methods for laying small-diameter propulsion pipes underground have been known, and the present applicant previously proposed the above-mentioned small-diameter pipes in Japanese Patent Application No. 59-198213. A propulsion method for effective installation was disclosed.

The propulsion method will be explained with reference to FIGS. 4 and 5. First, a hole 31 for propulsion work is drilled in the side wall at the propulsion position, and a blind plate is attached to the hole 31 in advance. 32 is pushed into the ground parallel to the inner moat while swinging, and is sunk to a predetermined depth after determining the direction. After attaching the fixing plate 33 to the bottom of the casing 32, a propulsion device installation space is formed, and a space holding case 34 is attached within the space. The proximal end of the propulsion device 35 is fixed to the other side wall of the casing 32. Next, by using the casing 32 as a propulsion reaction force generator, the propulsion pipe A can be installed by propelling it into the ground through the propulsion work hole 31 from which the blind plate has been removed.

However, conventional propulsion methods, including the above-mentioned propulsion method, have the following problems.

That is, in the conventional propulsion method, when installing a lining plate at the top of a shaft, it is necessary to install a ready-made square lining plate using a support girder separately from the shoring, and the installation of such a lining plate is difficult. In addition to taking a considerable amount of time, it was extremely difficult to adjust the height to the road, etc., causing a hindrance to traffic.

[Problem that the invention seeks to solve]

An object of the present invention is to provide a structure for attaching a lining plate to a casing that can solve the above problems.

[Means for solving problems]

The present invention has a structure in which a vertical shaft is excavated almost vertically from the ground surface in the propulsion method, a casing made of steel pipe or the like is buried therein, and a lining plate is attached to the upper end of the casing in alignment with the ground surface. A cylindrical leg portion is formed around the plate and fits into the outer periphery of the casing so as to be able to move up and down, and a plurality of hydraulic cylinders for setting the level of the lining plate are arranged on the inner peripheral wall of the casing, It is characterized in that a telescopic rod is connected to the lining plate.

With this configuration, by operating the hydraulic cylinder, the level of the lining plate can be freely changed to suit the road surface. In addition, since multiple hydraulic cylinders are arranged, the lining plate can be set in an inclined position with respect to the casing axis by adjusting the travel distance of each telescopic rod. It becomes possible to lay the board.

〔Example〕

Hereinafter, the present invention will be specifically described based on embodiments shown in the accompanying drawings.

Figure 1 is a cross-sectional front view of the lining plate attachment structure to the casing according to the first embodiment, and Figure 2 is the figure 1-
FIG. 3 is a cross-sectional view taken along the line of FIG. 2.

In FIGS. 1 to 3, reference numeral 1 indicates a plurality of casings having hollow circular cross sections connected in series by joints, which are pushed into the ground 2 to a predetermined depth. In addition, the casing 1 may be singular.

Reference numeral 3 denotes a lining plate elevating guide tube with a hollow circular cross section that is detachably attached to the uppermost casing 1, and a lining plate 4 is fitted to the outer periphery of the guide tube 3 so as to be movable up and down.

In this embodiment, the lining plate 4 connects a cylindrical leg 5 with a hollow circular cross section that is fit into the guide tube 3 so as to be able to rise and fall freely, and a base end of the cylindrical leg 5 at the lower peripheral edge.
A circular lining board body 7 forming a road surface 6 on its upper surface
It consists of

Further, 8 is a lining plate height adjustment device detachably attached to the joint between the uppermost casing 1 and the lining plate lifting guide tube 3, and is arranged at intervals in the circumferential direction within the casing 1. A plurality of hydraulic cylinders 9 are fixed to the joint portion with connecting fittings 10 such as bolts, and the tips of the rods 11 are connected to the lower surface of the lining plate main body 7. .

With the above configuration, even if the level of the ground surface G and the level of the tread surface 6 of the lining board 4 are different, the lining board 4 can be raised and lowered by operating the hydraulic cylinder 9. The level of the tread 6 can be easily and quickly matched to the level of the ground surface G. Also,
If the degree of fitting is such that the cylindrical leg portion 5 can be inclined to a certain extent with respect to the lining plate elevating guide cylinder 3, the posture of the lining plate 4 can also be changed freely. That is, since a plurality of hydraulic cylinders 9 are arranged, if the extension amount of each telescopic rod 11 is set appropriately, the lining plate 4 can be tilted with respect to the axis of the casing 1, and the tread 6 can be tilted against the surrounding ground. Construction can be performed in accordance with the slope and camber of the surface G. Further, since the lining plate 4 is connected to the telescopic rod 11, even if an unbalanced load is applied to the lining plate 4, no lifting occurs on the side with no load, and a stable installation state is maintained.

In addition, to explain other structures in FIGS. 1 to 3, 15 is a manhole provided in the lining plate main body 7, and 16 is a manhole provided on the casing 1 and the inner wall of the lining plate lifting guide tube 3 directly below the manhole 15. This is an attached scaffolding metal fitting, and a worker can enter and exit the casing 1 by opening the manhole 15, and can connect the casings 1 from inside.

〔Effect of the invention〕

With the configuration described above, the present invention has the following effects.

By using the lining board lifting device, the level adjustment between the tread of the lining board and the ground surface can be performed quickly and reliably.

There is no need for a lining plate support girder, the device configuration is simple, and it can be manufactured at low cost.

The lining plate can be placed exactly at the same level as the ground surface, making it safer for traffic.

[Brief explanation of drawings]

1 is a cross-sectional front view of a lining plate structure according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line of FIG. 1, FIG. 3 is a sectional view taken along the line of FIG. FIG. 5 and FIG. 5 are explanatory diagrams showing the propulsion method. In the figure, 1: casing, 2: underground, 3: lining plate lifting guide tube, 4: lining plate, 5: cylindrical leg, 6: tread, 7: lining plate body, 8: lining plate height adjustment device,
9: Hydraulic cylinder, 10: Connecting fittings, 11: Telescopic rod, 15: Manhole, 16: Scaffolding fittings, 2
0: Lining plate lifting guide tube, 31: Hole for propulsion work, 3
2: Steel casing, 33: Fixing plate, 34: Space holding case, 35: Propulsion device.

Claims (1)

[Claims] 1 In the propulsion method, a shaft is excavated almost vertically from the ground surface, a casing made of steel pipe or the like is buried inside, and a lining plate is attached to the upper end of the casing to match the ground surface, and a lining plate is installed around the lining plate. A plurality of hydraulic cylinders are arranged on the inner circumferential wall of the casing, and a plurality of hydraulic cylinders are arranged on the inner peripheral wall of the casing to set the level of the lining plate. A structure for attaching a lining plate to a casing, characterized in that it is connected to a lining plate.