JPH04194224A - Advancing method for open shield machine and device thereof - Google Patents

Abstract

PURPOSE:To simply execute installing work in a short time and improve safety by previously assembling a receiving pressure adjusting frame out of a rectangu lar frame body as a pushing square member and a receiving member of jacks as a slat, and assembling a concrete box body of long box length. CONSTITUTION:A receiving pressure adjusting frame 9 is constituted out of a rectangular frame body 10 which is contacted with the front end face of a concrete box body consisting of a bottom plate 4a, side plates 4b, an upper plate 4c, suspending down in the tail part 1d of a shield machine, and a receiving member 12 of propulsion jacks joined with the former through horizontal joining members 11. After shortening the propulsion jacks 2, the box body 4 is suspended down from the upward, provided in the tail part 1d of the shield machine 1, and the receiving pressure adjusting frame 9 is suspended down so that the rectangular frame body 10 is contacted with the front end face of the box body 4. Then, the propulsion jacks 2 are extended, and the box body 4 is advanced by reaction through the receiving pressure adjusting frame 9. Hereby, the concrete box body of long box length can be installed with small sized propulsion jacks.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an open shield machine used in the open shield construction method for constructing underground structures such as underground passages for water supply and sewage systems, public drains, telegraph and telephone lines, etc. in urban areas. and how to move forward.

[Conventional technology]

The open shield construction method is a highly rational construction method that takes advantage of the advantages of the cut-and-cover construction method (open construction method) and the shield construction method.
A U-shaped open shield machine 1 with openings on the front, rear, and top surfaces, consisting of a bottom plate IC of approximately the same length as the bottom plate IC connecting them, is used, and this shield machine 1 is installed in the launch shaft 6, and the shield The earth and sand in front of the starting shaft 6 is excavated from the front or top opening of the machine 1, and the earth is discharged. Then, the propulsion jack 2 of the shield machine 1 is extended and the reaction force is taken by the reaction wall in the launch shaft 6 to advance the shield machine 1, and the concrete box 4 is suspended from above as an underground structure. shield machine 1
Set it behind the propulsion jack 2 which has been retracted within the tail part ld of.

Next, earth and sand are similarly excavated and discharged from the front or upper surface of the shield machine 1, and the shield machine 1 is advanced by extension of the propulsion jack 2, and a second concrete box is placed in front of the first concrete box 4. The concrete box 4 is suspended into the tail portion ld of the shield machine 1. Thereafter, the same excavation and setting steps of the concrete boxes 4 are repeated to sequentially bury the concrete boxes 4 in the ground in columns, and backfill 5 is applied to the rear concrete boxes 4. Although not shown in the drawings, When the open shield machine 1 reaches the reaching shaft, it is removed and the construction is completed. In the figure, reference numeral 7 indicates a push angle that is suspended behind the propulsion jack 2. This push angle 7 is a square frame body that is joined to the front end surface of the concrete box 4, which is a cylinder that can be pulled out laterally. It has the role of evenly transmitting the load of the concrete box 2 to the front end of the concrete box 4 and protecting the concrete box 4 from destruction.

[Problems to be Solved by the Invention] Incidentally, the longer the concrete boxes 4 to be laid, the fewer the number of concrete boxes 4 will be required, and the number of forward steps of the shielding machine 1 will also be reduced.

On the other hand, setting the concrete box 4 with a long box requires a propulsion jack 2 with a long stroke, and the overall length of the "open shield machine" to which this is installed is also long, and the diameters of the piles in the starting shaft 6 and the reaching shaft are also large. There must be.

For example, the length of the concrete box 4 to be laid is L =
At 1.50m, the stroke of propulsion jack 2 is L.
= 1.50m or more is required to secure the 1.50m space required for installing the box 4, but conventionally, the push angle 7 alone is insufficient to compensate for the difference in box length and jack stroke. In this case, the strut 8 is placed in front of the push corner 7.

The struts 8 are vertical square members made of steel or wood, and the struts 8 are square frame members connected to the front end surface of the concrete box 4.
In contrast, the left and right longitudinal parts, that is, the concrete box 4
It is arranged so as to correspond to the front ends of the left and right side wall plates forming the.

However, in such a conventional method, the suspension work of the push angle 7 and the strut 8 is performed separately, and the struts 8 are also arranged one by one (four in the example shown), which is time-consuming. Become what you need.

Further, the work of lifting and lowering the push angles 7 and struts 8 by a tow truck is very dangerous because it is carried out in a narrow space. Φ The purpose of the present invention is to eliminate the disadvantages of the conventional example, and to make it possible to install a concrete box with a long box length using a small propulsion jack with a small stroke, which can be done easily and in a short time, and with improved safety. An object of the present invention is to provide a method and facility for advancing an open shield aircraft.

[Means for Solving the Problem] In order to achieve the above-mentioned object, the present invention extends the propulsion jack of a shield machine which has a propulsion jack inside and has openings at the front and rear ends and the top surface, and extends the propulsion jack of the shield machine, which is provided with a propulsion jack inside, and extends the propulsion jack of the shield machine, which is provided with a propulsion jack inside. The shield machine is moved forward by taking the reaction force from the middle structure, and the concrete box that should be positioned in the front row is lowered from above and placed behind the propulsion jack that has been retracted within the tail of the shield machine. In the advancement method of an open shield machine, the shield machine is advanced by excavating from the front or upper front surface and extending the propulsion jack to take a reaction force against the concrete box in the front row and the existing concrete boxes arranged in tandem with the concrete box. After suspending the box from above and positioning it in the front row of the existing concrete box, and further before that, a rectangular frame that comes into contact with the front end surface of the concrete box that is suspended into the tail section of the shield machine; A pressure receiving adjustment frame consisting of a rectangular frame body and a propulsion jack receiving member connected via a horizontal connecting member is suspended and arranged, and the shield machine is moved forward by receiving the propulsion jack extending through the pressure receiving adjustment frame. The main points are as follows.

[Effect]

According to the present invention as set forth in claims 1 and 2, the pressure receiving adjustment frame has a rectangular frame as a pushing angle and a propulsion jack receiving member as a strut assembled together in advance, Since it is sufficient to suspend only one of these, the lifting and removal work can be significantly shortened compared to the conventional method.

According to the present invention as set forth in claim 3, the size of the pressure receiving adjustment frame can be changed by adjusting the jack, so that it can be suspended in a contracted state and then adjusted to a predetermined size by expanding the jack inside the shielding machine.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a longitudinal sectional side view showing one embodiment of the advancement method and advancement equipment for an open shield machine of the present invention, and FIG. are given the same reference numerals.

In the figure, reference numeral 1 denotes an open shield machine, which may be the same as the conventional one, and consists of a front panel consisting of left and right side wall plates 1a and a bottom plate 1c having the same length as these side wall plates 1a and connecting them.
Left and right side wall plates 1 are attached to the U-shaped main body with openings on the rear and top surfaces.
A propulsion jack 2 is disposed inside a so as to face rearward.

Reference numeral 9 in the figure is a pressure receiving adjustment frame used in the present invention, and as shown in FIG. 4
A rectangular frame body 10 that comes into contact with the front end surface (the end surfaces of the bottom plate 4a, side plate 4b, and top plate 4C) of the concrete box 4, and the rectangular frame body 10 and a propulsion jack receiving member 12 connected to the propelling jack via a horizontal connecting member 11.

The receiving member 12 of this propulsion jack is composed of a horizontal member 12a and a vertical member 12b, and may have the same shape as the rectangular frame 10 and be assembled into a rectangular frame, or may omit the horizontal member 12a and only have the vertical member 12b. There are cases where

Furthermore, the rectangular frame 10 also has a horizontal member 10a and a vertical member 10.
The horizontal member 10a and the receiving member 12 of the rectangular frame 10 incorporate a jack 13 in the middle of the horizontal member 12a, and by using the jack 13 as the horizontal connecting member II, the width direction and length can be adjusted. It can also be made variable in the direction.

Although not shown, the vertical member 10b and the vertical member 12b
A jack 13 may also be incorporated in the middle to make it variable in the height direction.

Next, an open shield construction method using such a pressure receiving adjustment frame 9 will be explained.

The outline of the open shield construction method is the same as the conventional example, and the open shield machine 1 is used to excavate and remove earth and sand in the starting shaft.

Then, the propulsion jack 2 of the shield machine 1 is extended and the reaction force is taken by the reaction wall in the launch shaft 6 to advance the shield machine 1, and the concrete box 4 is suspended from above as an underground structure. It is placed behind the propulsion jack 2 which is retracted within the tail portion ld of the shield machine 1.

Next, earth and sand are similarly excavated and discharged from the front or upper surface of the shield machine 1, and the shield machine 1 is advanced by extension of the propulsion jack 2, and a second concrete box 4 is placed in front of the first concrete box 4. A concrete box 4 is hung and displayed within the tail part ld of the shield machine 1. Thereafter, the same excavation and setting process of the concrete boxes 4 is repeated to sequentially bury the concrete boxes 4 in the ground in columns, backfill 5 is applied on the rear concrete boxes 4, and the open shield machine 1 is installed. Once the tunnel has been reached, it will be removed and the construction will be completed.

After the propulsion jaw 7ki 2 is retracted, the concrete box 4 is suspended from above and the tail portion ld of the shield machine 1 is
Once installed inside, the pressure receiving adjustment frame 9 is suspended so that the rectangular frame body 10 comes into contact with the front end surface of the concrete box body 4.

In addition, when the jack 13 is incorporated, the jack 13 may be shortened and suspended in a small overall state, and the jack 13 may be extended within the tail portion ld to a desired size.

When the propulsion jack 2 is extended after the pressure receiving adjustment frame 9 is disposed in this way, the shield machine 1 moves forward via the pressure receiving tN adjustment frame 9 using the concrete box 4 as a reaction force.

In addition, when the jack 13 is incorporated, the lengths of the left and right horizontal members 12a of the pressure receiving adjustment frame 9 are made unequal, and the receiving member 12 of the propulsion jack is tilted on the left and right sides, as shown in FIG. You can also do that.

In this way, it becomes convenient to bend the shield machine 1 left and right to correct the direction.

(Effects of the Invention) As described above, the oven shield machine advancing method and advancing equipment of the present invention enable a concrete box with a long box length to be installed using a small propulsion jack with a small stroke. The installation work to compensate for the lack of jack stroke can be done easily and in a short time.
As a result, safety is also improved.

In addition, the fact that a small propulsion jack is required means that the oven shield machine itself can be made smaller, which reduces the cost of the shield machine and requires a smaller starting shaft, leading to lower construction costs.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view showing one embodiment of the advancing method and advancing equipment of the oven shield machine of the present invention, Fig. 2 is a transverse plan view of the same, Fig. 3 is a perspective view of the main part, and Fig. 4 is a bending FIG. 5 is a cross-sectional side view showing an outline of the oven shield construction method, and FIG. 6 is a vertical side view showing a conventional example. 1...Oven shield machine 1a...Side wall plate 1c...Bottom plate 1d...Tail portion 2...Propulsion jack 4...Concrete box 4a...Top plate 4b...Side plate 4c ...Bottom plate 5...Backfilling 6...Starting hole 7.
... Push angle 8 ... Strut 9 ... Pressure receiving adjustment frame 10 ...
Rectangular frame 10a...Horizontal member 10b...Vertical member 11...Horizontal connecting member 12...Propulsion jack receiving member 12a...Horizontal member 12b...Vertical member 13...
・Jyatsuki

Claims (3)

[Claims] (1) The propulsion jack of the shield machine, which has a propulsion jack installed inside and has openings at the front and rear ends and the top, is extended to take the reaction force against the existing underground structure formed by vertical rows of concrete boxes and move the shield machine forward. The concrete box to be placed in the front row is suspended from above and set behind the retracted propulsion jack within the tail of the shield machine, and then excavated from the front or top of the front of the shield machine and the propulsion jack is extended to reach the maximum height. In the advancement method of an open shield machine in which the shield machine moves forward by taking reaction force from the front row of concrete boxes and the existing concrete boxes arranged in tandem, the concrete boxes are suspended from above and the front row of the existing concrete boxes are moved forward. After positioning the concrete box, and further before that, a pressure receiving adjustment frame, which is integrally framed with a frame material that contacts the front end surface of the concrete box and a propulsion jack receiving member located in front of the frame material, is suspended and placed. , a method for advancing an open shield aircraft, characterized in that the shield aircraft is advanced by receiving a propulsion jack extending through the pressure receiving adjustment frame. (2) A rectangular frame that comes into contact with the front end surface of a concrete box that is suspended in the tail of the shield machine, as a pressure receiving adjustment frame used in a shield machine with openings at the front and rear ends and the top surface, which is equipped with a propulsion jack inside; Advancement equipment for an open shield machine comprising a propulsion jack receiving member connected to the rectangular frame via a horizontal connecting member. (3) The pressure receiving adjustment frame incorporates a jack into its constituent members,
3. The advancement equipment for an open shield machine according to claim 2, wherein the size is variable.