JPH0418120B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention provides a method for constructing an arched tunnel and a sliding inner scaffolding trolley for use in the method.

(Prior art) Conventionally, the construction of arch-shaped tunnels is as shown in Fig. 4A~
The procedure was as shown in I. On the first day,
As shown in FIG. 7, in the first section of the open groove 1, concrete 4 is placed between the arch-shaped inner slide form 2 and outer slide form 3. At this time, in the second section, part of the reinforced scaffolding 5 is assembled. The length of each section is approximately 10.5m.
On the second day, as shown in Figure B, the concrete 4 is cured in the first section, the gable frame is dismantled, and the surface of the poured area is roughened. In the second section, the assembly of the reinforced scaffolding 5 continues. On the third day, as shown in FIG. C and FIG. 5, the inner slide form 2 in the first section is moved to the second section and set, and the formwork is inspected. In the second section, the assembly of the reinforced scaffolding 5 is continued and completed. On the fourth day, as shown in FIG. D and FIG. 6, assembly of reinforcing bars 6 is started on the outer surface of the slide form 2 in the second section. On the fifth day, assembly of reinforcing bars 6 is continued in the second section, as shown in FIG. On the sixth day, as shown in Figure F, the assembly of the reinforcing bars 6 in the second section was completed, and the reinforcing bars 6
to be inspected. On the seventh day, as shown in Figure G, dismantling of the reinforced scaffolding 5 will begin in the second section. On the 8th day, as shown in Figure H, the dismantling of the reinforcing steel scaffolding 5 in the second section is completed, and the outer slide form 3 in the first section is moved and set on the outside of the reinforcing bars 6 in the second section. . On the 9th day, as shown in Figure I,
The assembly of the outer slide form 3 in the second section is completed, and the formwork is inspected. Next, as shown in FIG. 7, concrete 4 is placed between the inner slide form 2 and the outer slide form 3. After that, the above-mentioned process is repeated, and the third section and the fourth section are
Work will be carried out in sections, and arch-shaped tunnels will be formed one after another.

(Problems to be Solved by the Invention) However, such construction methods have the following problems.

(b) It takes too many steps and days to form one section of tunnel.

(b) There is a lot of work at heights, which is dangerous.

(c) Hanging scaffolding 7 is required, and advanced kite skills are required.

(d) Labor management and safety management are difficult due to irregular job types and personnel assignments.

An object of the present invention is to provide a construction method for an arch-shaped tunnel that can shorten the process, safely perform construction using standard techniques, and in a clear construction cycle, and a sliding inner scaffolding trolley for use in the construction method. There is a particular thing.

(Means for solving the problem) The construction method of the arched tunnel according to the present invention is as follows:
A sliding inner scaffolding trolley is moved to the construction section and set, reinforcing bars are assembled around the outer circumference of the inner scaffolding trolley, and after the reinforcing bars have been assembled, the inner scaffolding trolley is moved from the inside of the reinforcing bars to the next one. Instead, move the inner slide form to the inside of the reinforcing bars and set it. Next, move the outer slide form to the outside of the reinforcing bars and set it. In this state, both slide forms This is characterized by concrete being poured in between.

The sliding inner scaffolding trolley used in the construction method of the arched tunnel according to the present invention includes an inner scaffolding main body having wheels at the lower part, and an arch-shaped support supported on the outer surface of the inner scaffolding main body so that the diameter can be contracted inward. It comprises an inner dimension gauge, a reinforcing reinforcing reinforcing guide pipe supported along the outer surface of the inner dimension gauge, and a retractable outer scaffold slidably supported by the inner scaffold body.

(Function) When using the sliding inner scaffolding trolley in this way,
Among these, the scaffolding cart will be used to assemble reinforcing bars. After the reinforcing bars are assembled, the inner scaffolding cart can be easily moved to the next construction section, and the inner slide form can be moved and set inside the reinforcing bars instead. Therefore, the scaffolding can be set in the construction section and moved to the next section efficiently.

The sliding type internal scaffolding trolley is equipped with an arch-shaped internal dimension gauge, and the surface of this internal dimension gauge is equipped with a reinforcing bar fog guide pipe, which makes it easy to position the reinforcing bars and also allows for no problem with reinforcing bar fog dimensions. You can take it. The outer scaffold can be slid from the inner scaffold body and protrude outward as needed.

(Example) Examples of the present invention will be described in detail below with reference to the drawings. First, with reference to FIGS. 2 and 3, the structure of an example of the sliding type internal scaffolding cart 8 of the present invention will be described. Of these, the scaffolding cart 8 is a rail 10 installed on pre-cast concrete 9 at the bottom of the open trench 1.
It is designed to move upwards. That is,
This sliding inner scaffolding trolley 8 has an inner scaffolding main body 11 formed by assembling H-shaped steel or the like, and wheels 12 that run on rails 10 and a rake lamp 13 are provided at the lower part of the inner scaffolding main body 11. Inner scaffolding body 11
An arch-shaped inner cavity dimension gauge 14 is provided on the outer surface of the holder. The inner space gauges 14 adjacent in the circumferential direction are pivotally connected by a hinge 15. These inner space dimension gauges 14 are supported by the inner scaffold main body 11 by adjustment jacks 16 so that the diameter can be reduced. A reinforcing bar covered guide pipe 17 is supported along the outer surface of the inner space gauge 14. A retractable scaffold 18 is supported by the inner scaffold main body 11 so as to be horizontally slidable, and can be protruded to the outside as required. An insert-type handrail 19 is attached to the tip of the outer scaffold 18.

Next, an example of the method for constructing an arched tunnel according to the present invention using such a sliding inner scaffolding cart 8 will be described with reference to FIGS. 1A to 1E. On the first day, concrete 4 is poured between the arch-shaped inner slide form 2 and outer slide form 3 in the first section of the open groove 1, as shown in FIG. 1A. In the second section, the sliding inner scaffolding trolley 8 is set and assembly of reinforcing bars begins on its outer surface. Second
On the first day, as shown in Figure B, the concrete 4 is cured in the first section, the gable frame is dismantled, and the surface of the concrete joint is roughened. In the second section, the reinforcing bars 6 are assembled and inspected. On the third day,
As shown in Figure C, the sliding inner scaffolding trolley 8 is moved from under the reinforcing bars 6 in the second section to the fourth section, and the inner sliding form 2 is moved from under the concrete 4 in the first section to the third section. After moving and carving there, it is set under the reinforcing bar 6 in the second section. On the fourth day, as shown in FIG.
Set outside. On the fifth day, as shown in Figure E, the gable frame is assembled, the formwork is inspected, and the sliding inner scaffolding cart 8 is moved from the fourth section to the third section and set. Next, concrete 4 is poured between both slide forms 2 and 3 as shown in FIG. 2A, and the above-described steps are repeated to form an arched tunnel.

In this case, when the sliding inner scaffolding cart 8 is moved from under the reinforcing bars 6, the diameter of the inner hollow dimension gauge 14 is reduced by operating the adjustment jack 16, so that the movement can be easily performed.

Also, when assembling the reinforcing bars 6, use the inner space gauge 1
Since the reinforcing bar covering guide pipe 17 is protruded from the surface of the reinforcing bar 4, the reinforcing bar 6 can be assembled by separating the reinforcing bar 6 from the surface of the inner space gauge 14 by the reinforcing bar covering dimension.

(Effects of the Invention) As explained above, according to the method for constructing an arched tunnel according to the present invention, the following effects can be obtained.

(a) A sliding inner scaffolding trolley with completed scaffolding is used to assemble the reinforcing bars, making it possible to significantly shorten the process and construction period.

(b) Work at heights is reduced and safer.

(c) Significant cost reductions can be achieved compared to conventional construction methods.

(d) It does not require advanced technology and can be constructed using standard carpentry and earthwork techniques.

(e) The construction cycle becomes clearer, making labor management and safety management easier.

(f) Particularly advantageous when constructing structures in curved sections.

Moreover, according to the sliding type internal scaffolding trolley according to the present invention, the following effects can be obtained.

(g) Since the inner scaffold body has an inner cavity dimension gauge on its surface, it can be used to easily assemble arch-shaped reinforcing bars.

(h) Since the reinforcing bar fogging guide pipe is provided on the surface of the inner cavity dimension gauge, the fogging dimension of the reinforcing bars can be ensured using this guide pipe.

(i) Since the inner space dimension gauge is supported by the inner scaffold body so that its diameter can be reduced, by reducing the diameter, the sliding inner scaffolding trolley can be easily escaped from within the assembled reinforcing bars.

[Brief explanation of drawings]

Figures 1A to 1E are process diagrams showing an example of the construction method for an arched tunnel according to the present invention, and Figures 2 and 3 are
The figure shows a front view and a side view of an example of a sliding inner scaffolding trolley according to the present invention, Figures 4A to I are process diagrams of a conventional arched tunnel construction method, and Figure 5 shows an example of an inner slide form in a conventional construction method. Figure 6 is a front view showing the relationship with the outside scaffolding, Figure 6 is a front view showing reinforcing bars assembled on the outer surface of the inner slide form in the conventional construction method, and Figure 7 is a front view showing concrete placement in the conventional construction method. be. 1...Open groove, 2...Inner slide form, 3
...Outer slide form, 4...Concrete, 5...Outer scaffolding, 6...Reinforcing bars, 8...Sliding inner scaffolding trolley, 10...Rail, 11...Inner scaffolding body, 12...Wheels, 14... ...Inner space gauge,
15...Hinge, 16...Adjustment jack, 17...
...Reinforced reinforcing guide pipe, 18...Retractable external scaffolding.

Claims (1)

[Scope of Claims] 1. Move and set a sliding inner scaffolding trolley to the construction section, use the inner scaffolding trolley to assemble reinforcing bars on its outer periphery, and after completing the assembly of the reinforcing bars, move the inner scaffolding trolley to the construction section and set it. slide from the inside of the reinforcing bars to the next construction section side, move and set an inner slide form inside the reinforcing bars instead, and then move and set an outer slide form outside of the reinforcing bars, A method for constructing an arched tunnel, characterized in that concrete is poured between the two slide forms in such a state. 2. An inner scaffold main body having wheels at the lower part, an inner hollow dimension gauge supported in an arch shape on the outer surface of the inner scaffold main body so as to be able to contract inwardly, and a hollow dimension gauge supported along the outer surface of the inner hollow dimension gauge. A sliding type inner scaffolding trolley used in the construction method of an arched tunnel, comprising a reinforced reinforcing reinforcing guide pipe and a retractable outer scaffolding slidably supported by the inner scaffolding trolley.