JPH0738475Y2 - Open-cut type Messel shield machine - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of an open-cut type Messel shield machine used for underground burial work such as a pipe.

(Prior Art) As a pipe burying method, an open pit method using an open-cut type Messel shield machine as shown in FIG. 3 is known. In this Messel shield machine, frames 1 and 2 each having a rectangular cross section divided into front and rear are connected by an intermediate jack 3. The front and rear sides of the front frame 1 are attached to the front and rear sides by a Messel jack 5 provided on the front frame 1. A large number of strip-shaped mesels 4 driven in the direction are arranged in parallel. These messel jacks 5 and intermediate jacks 3
Is a hydraulic power unit 23 mounted on the front frame 1
It is driven by pressure oil supplied from.

The excavation of the ground is carried out by the backhoe in front of the front frame 1.
21. Both sides and the bottom of the face are driven by a messel jack 5 and sequentially penetrate into the ground.
Yamadome is given by. Then, the front frame 1 moves forward by synchronously contracting all the messel jacks 5 in accordance with the progress of excavation.

On the other hand, inside the rear frame 2, the foundation construction and crane
Laying of a pipe culvert (box culvert) 20 using 22 is performed. The rear frame 2 advances due to the contraction of the intermediate jack 3, and in the rear of the rear frame 2, backfilling work of the backfill soil 14 is performed on the box culvert 20 that has been laid.

Since the front and rear frames 1 and 2 move forward by the contracting forces of the messel jack 5 and the intermediate jack 3 that use the frictional resistance between the messel 4 and the ground as a reaction force, these propulsion reaction forces act on the pipe. Nonetheless, any type of pipe can be used for the buried pipe, including cast-in-place concrete. In addition, as the shield machine moves by itself in this way, each step of excavation, mountain retention, pipe laying and backfilling is performed continuously, so the area of the excavated part required for the work is also increased. It can be kept to the minimum necessary.

(Issues to be devised) By the way, this rear side is particularly effective for burial work on roads with heavy traffic where it is difficult to secure a work space by the conventional construction method. It is often limited to a time zone when the amount is small, and it is preferable to cover the excavated portion during the working hours so that the vehicle can pass through the construction site.

Then, this invention aims at providing the open-cut type Messel shield machine of the structure which can perform such a lining easily.

(Means for Achieving the Object) The present invention connects the two front and rear frames with an intermediate jack, and allows a plurality of messels penetrating the front face of the front frame to be freely displaced in the front and rear directions on the outer periphery of the front frame. In an open-cut type Messel shield machine equipped with jacks for arranging them in parallel and driving each of these mesels back and forth, in the front frame, at the upper edge front edge of the front frame,
By supporting the lining plate via an arm provided so as to be able to swing about a substantially horizontal axis that is orthogonal to the traveling direction of the shield machine, and laying the arm down on the ground in front of the face. While the lining plate forms a continuous runway on the excavation part together with other lining plates arranged on the rear shield machine, the arm in front is rearwardly raised and the ground in front of the cutting face and the front part of the shield machine are formed. The excavated portion is opened between the and.

(Operation) During work, the lining plate is raised or tilted backward so that the upper part of the face is in a fully open state, which does not hinder excavation work. At the end of the working time, this lining plate is unfolded on the ground in front of the face to cover the face, and another lining plate is continuously installed behind the face to install the lining plate on the shield machine. The lining of the excavated part from the mountain to the backfill soil in the rear is completed.

(Embodiment) FIGS. 1 and 2 show an embodiment of the present invention. The same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 1 is a front frame of the shield machine, and 2 is a rear frame connected to the front frame 1 via an intermediate jack 3. A large number of mesels 4 are arranged side by side in a strip shape on both side surfaces and a lower surface of the front frame 1, and a messel jack 5 for driving the mesels 4 back and forth is supported by the front frame 1.

An arm 6 fixed to a lining plate 7 is provided at the upper end of the front frame 1.
Is hinged to the front of the front frame 1 so as to be able to fall down. Further, on the upper surface of the front frame 1 behind the arm 6, another lining plates 8 and 9 are fixedly provided adjacent to each other. The lining plate 9 is fixed to the front frame 1 so as to cover the gap between the front and rear frames 1 and 2, and is supported so as to be displaceable relative to the rear frame 2. Further, the lining plate 7 is locked to the lining plate 8 by the locking tool 10 with the tip of the arm 6 tilted backward so that the upper part of the face can be fully opened. The vertical dimensions of the front and rear frames 1 and 2 with respect to the excavated cross section are determined so that the upper surfaces of the lining plates 7 to 9 substantially match the ground heights on both sides.

Further, a holder 13 for holding the earth retaining plate 12 as shown in FIG. 2 is fixedly provided on the front edge of the front frame 1, and a box culvert laid with the frame rear edge on the rear frame 2.
An upper soil retaining plate 15 and a side soil retaining plate 16 are provided to prevent backfill soil 14 from entering between 20 and 20.

Next, the operation will be described.

As for the burying work, as in the conventional example, ground excavation in front of the front frame 1, retaining of the excavation part by the Messel 4, construction of the foundation 24 inside the rear frame 2 and laying of the box culvert 20 are performed. Backfilling in the rear of the rear frame 2 is performed while the shield machine is moved forward by the expansion / contraction drive of the messel jack 5 and the intermediate jack 3. Since the lining plate 7 is locked together with the arm 6 in the backward tilt position shown in FIG. 1 during the work, the upper part of the face is in a fully opened state, and the lining plate 7 is in a state of excavation work. There is no danger of interfering with Backhoe 21. The hydraulic power unit can be used by placing it on the lining plate 8 or 9.

On the other hand, at the end of the working time, as shown in FIG. 2, the soil retaining plate 14 is inserted into the holder 12 to retain the soil on the front face, and in the rear frame 2, the upper soil retaining plate 15 and the side soil retaining plate 16 are completely filled. Do the return.

Next, using the crane 22 or the like, the arm 6 is deployed together with the lining plate 7 with its tip facing forward, and the tip of the lining plate 7 is placed on the notch formed in the natural ground 25 in advance. The crane is also mounted on the front frame 1 between the lining plates 7 and 8 and on the rear frame 2 between the lining plate 9 and the backfill soil 14.
If a lining plate 11 prepared separately using 22 or the like is laid, a road surface continuous between the ground 25 and the backfill soil 24 is completed. The hydraulic power unit is stored inside the front frame 1 or in another place so as not to be exposed on the lining plates 7, 8, 9 and 11.

In this way, by covering the shield machine and the upper part of the excavation part, the excavated site can be easily used as a road for vehicle passage. Further, when the work is resumed, the construction can be started immediately by rotating the lining plate 7 together with the arm 6 to the rearwardly inclined position, removing the lining plate 11 and the earth retaining plate 12, and setting the hydraulic power unit.

(Effect of the Invention) As described above, according to the present invention, since the lining plate that expands to the ground in front of the frame and covers the face is provided at the upper end of the front frame of the excavation-type Messel shield machine, By tilting the lining plate backward, it will not hinder the excavation work, and at the end of the work, expand this lining plate between the front ground and another lining plate on the shield machine. By paving the ground, a continuous runway with a lining plate is quickly formed between the ground in front of the shield machine and the backfill soil in the rear.
It is also easy to restart construction.

Therefore, by providing the excavated part in the passage space for vehicles during non-working hours, efficient construction of pipes is possible while minimizing traffic obstacles even on busy roads. You can proceed.

[Brief description of drawings]

FIG. 1 is a side view of an open-cut type Messel shield machine during working showing an embodiment of the present invention, and FIG. 2 is a side view of the open-cut type Messel shield machine during non-working time. Further, FIG. 3 is a perspective view of a conventional Messel shield machine. 1 ... Front frame, 2 ... Rear frame, 3 ... Intermediate jack, 4 ... Messel, 5 ... Messel jack,
6 ... arm, 7,8,9,11 ... lining plate, 14 ... backfill soil,
25 …… Solid ground.

Claims (1)

[Scope of utility model registration request] 1. A front and rear halves of the frame are connected by an intermediate jack, and a plurality of messels that penetrate the front face of the front frame are arranged in parallel on the outer periphery of the front frame so as to be freely displaced in the front and rear direction. In an open-cut type Messel shield machine equipped with jacks for driving the front and rear of each Messel in the front frame, it swings at the upper front edge of the front frame about a substantially horizontal axis orthogonal to the traveling direction of the shield machine. Another lining plate which is arranged on the shield machine at the rear by supporting the lining plate through an arm provided so that the arm is laid down on the ground in front of the face. Along with forming a continuous track on the excavated part, the arm is erected rearward to open the excavated part between the ground in front of the face and the front part of the shield machine. Digging type Messel shield machine for.