JPH0359219A - Open shield machine capable of burying two stage up and down - Google Patents

Abstract

PURPOSE:To improve execution efficiency, shorten construction period, and reduce construction cost, by modifying an open shield machine so as to bury the upper part object to be buried on the backfilling earth of the latter, accompanying with burying the lower part object to be buried. CONSTITUTION:While progressive drilling is performed inside a front frame 1 with a drilling machine, the lower part object to be buried A is buried in the space inside a tail frame 3. At the same time, the upper part object to be buried B is buried inside a projecting frame 4 protected with a projected plate 6 on the backfilling earth of the lower part object to be buried A. Nextly, the front frame 1 is advanced by extending a propulsion jack with giving reaction on the backfilling earth of the lower and upper object to be buried A, B. Further, the propulsion jack is contractedly retreated by the dead weight of the front frame 1 and the friction force of surrounding earth and sand applied on a front plate 2, a tail plate 5, and the projected plate 6, as the reaction, to advance the tail frame 3 and the projecting frame 4. By repeating this operation and advancing the open shield machine, the upper and lower two stages of objects to be buried A, B are buried with same pace.

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to an open shield machine that is an improved open shield machine that can simultaneously bury objects such as pipes in two layers, one above the other. .

"Prior art" For example, when it is necessary to bury an upper part such as a box on top of a lower part buried object such as a humid pipe using the open shield method using an open shield machine,
Conventionally, the following method was used.

First, one end of the lower buried object is buried and backfilled within the tail frame of the open shield machine. Once the lower part has been buried, the backfill soil is dug up using a low-height open shield machine to bury the upper part.
Bury and backfill the upper buried object within the tail frame.

"Problems to be Solved by the Invention" As mentioned above, in order to bury buried objects in two levels, upper and lower, using a conventional open shield machine, after completing the burying of the lower buried objects, backfilling is required. It is extremely inefficient to have to dig up and bury the buried materials above.
This had the disadvantage of increasing construction costs and prolonging the construction period.

"Means for Solving the Problems" Therefore, the purpose of this invention is to improve the conventional open shield machine and make it possible to bury objects above and below at the same time, and has the following configuration. This is the summary.

As shown in FIGS. 1 and 2, a front frame 1 has a front plate 2 attached to the left and right sides, and a tail frame 3 has a tail plate 5 attached to the left and right sides so as to be slidable in the front and back direction. At the rear upper part of the tail frame 3 of the open shield machine, which connects with the propulsion jack 9 and connects the front plate 2 and the tail plate 5,
A protruding frame 4 that protrudes rearward is formed.

A protruding plate 6 protruding from the tail plate 5 is formed on both left and right sides of the protruding frame 4.

``Operation'' Burying of objects in two stages, upper and lower, can be carried out as shown in Fig. 3.

While excavating the inside of the front frame 1 using an excavator such as a backhoe, a lower buried object A such as a humid pipe is buried in the space inside the tail frame 3 already formed by the excavation.

At the same time, since the inside of the protruding frame 4 is protected by the protruding plate 6, the upper buried object B, such as a box, is placed on top of the backfill soil of the lower buried object A, which has already been buried within the protruding frame 4.
bury it.

Then, a reaction force is applied to the backfilling soil of the lower buried object A and the backfilling soil of the upper buried object B through the rearmost parts of the tail frame 3 and the protruding frame 4 or the reaction force plates attached to these. , the front frame 1 can be moved forward by extending the propulsion jack.

Next, if the weight of the front frame 1 and the frictional force between the front plate 2, the tail plate 5, and the protruding plate 6 with the sand on the circumferential surface are used as reaction forces, the propulsion jack is retracted and the tail frame 3 and the protruding frame 4 can be advanced. The rearmost space created by this is immediately backfilled for the lower buried object A from within the protruding frame 4 and for the upper buried object B from above the ground. By repeating this operation and moving the open shield machine forward, a predetermined space can be secured in the tail frame 3 and the protruding frame 4, and the lower buried object A and the upper buried object B are installed in these spaces, respectively.

Hereinafter, by repeating the above construction method using the open shield machine of the present invention, it becomes possible to bury the upper and lower buried objects ASB at the same time.

``Effects'' Because it is possible to bury objects in two levels, upper and lower, at the same time, construction costs can be significantly reduced compared to conventional methods, and the construction period can be shortened.

If the upper buried object is short in length from front to back, such as a box, the protruding frame and plate can be formed short, making it possible to sufficiently accommodate curved travel.

"Embodiments" Hereinafter, the present invention will be described in detail based on illustrated embodiments.

In Figures 1 and 2, 1 is the front frame,
A front plate 2 is fixed to both left and right sides. A hydraulic unit (not shown) is attached to the front frame 1 and drives a propulsion jack, which will be described later.

Reference numeral 3 denotes a tail frame, and a protruding frame 4 that protrudes rearward is integrally formed at the upper rear part of the tail frame. Reference numeral 5 denotes a tail plate, which is provided on both left and right sides of the tail frame 3, and a protruding plate 6 that protrudes rearward is integrally formed at the upper rear part of the tail plate. This protruding plate 6
are located on both left and right sides of the protruding frame 4.

On both left and right sides of the tail frame 3 and the protruding frame 4,
As shown in FIG. 4, a guide portion 7 is provided, and the tail plate 5 and the protruding plate 6 are slidable in the front-rear direction by the guide portion 7.

Reference numeral 8 denotes a hinge portion that connects the front plate 2 and the tail plate 5. In the embodiment, the front plate 2
It is formed by locking a fastener such as a bottle, bolt, or napht provided in the hole (see Fig. 5).

A hydraulic propulsion jack 9 connects the front frame 1 and the tail frame 3, and is driven by the hydraulic unit. In the embodiment, the cylinder part of the propulsion jack 9 is attached to the front frame 1 via a universal joint, and the rond part is attached to the tail frame 3 via a spherical bearing.
It is attached to the hinge part 8 and can sufficiently cope with curved driving.

10a and 10b are removable reaction plates. As described above, these reaction plates 10a and 10b are not necessarily necessary for moving the chill frame 3 and the protruding frame 4 forward. Also, only one of them may be used.

In addition, when the propulsion jack 9 is extended to advance the front frame 1 by taking a reaction force on the backfill soil of the lower buried object A, a large reaction force is applied to the backfill soil of the lower buried object A, and the upper buried object Sometimes I lift object B. Therefore, as shown in FIG. 6, it is preferable to fix the support member 11 to the tail frame 3 on the front side of the reaction force plate 10a, and to tension the reaction force absorption spring 12 between the reaction force plate 10a and the support member 11.

Here, instead of forming the above-mentioned tail frame 3 and protrusion frame 4 integrally, it is also possible to form them separately and to connect and fix them to each other, or to connect them detachably. Similarly, the tail plate 5 and the protruding plate 6 can be formed separately and connected and fixed to each other, or can be connected detachably.

Further, the present invention can be implemented in the "open shield excavator" described in Japanese Patent Application Laid-Open No. 56-105097.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view, and FIG. 2 is a plan view. Further, FIG. 3 is an explanatory diagram showing the buried state. FIG. 4 is a sectional view showing the guide portion, and FIG. 5 is a plan view showing the hinge portion. FIG. 6 is a longitudinal cross-sectional view of the main part showing the state in which the reaction force absorbing spring is attached. l...Front frame 2...Front plate 3...Tail frame 4...Protruding frame 5...Tail plate 6...Protruding plate 9...Propulsion jack 10a , 10b... Reaction plate A... Lower buried object B... Upper buried object

Claims (1)

[Claims] 1 A front frame 1 with front plates 2 attached to the left and right sides and a tail frame 3 with tail plates 5 attached to the left and right sides so as to be slidable in the longitudinal direction are connected by a propulsion jack 9, and the front plate 2 In an open shield machine formed by connecting a tail plate 5 and a rear part of the tail frame 3, a protruding frame 4 that protrudes rearward is formed at the upper part of the rear part of the tail frame 3, and a protruding frame 4 that protrudes from the tail plate is formed on both left and right sides of the protruding frame 4. plate 6
An open shield machine that can be buried in two stages, upper and lower.