JPH10252202A - Dome construction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a reinforced concrete wall by means of a simple means, without necessitating construction of a form made of wood or assembling/ disassembling of a large-scaled scaffold. SOLUTION: A supporting member 4 is erected between a ring member 2, which is supported horizontally by a plurality of columns 1, and an annular foundation 3 having a large diameter which is arranged coaxially with the ring member 2. A bag member 5 supported by the supporting member 4 is expanded in order to cast a reinforced concrete wall 6 on the upper surface of the bag member 5. With regard to the internal space of the ring member 2 as well, the bag member 5a is expanded in order to cast a reinforced concrete wall 7 on the upper surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for constructing a dome.

[0002]

2. Description of the Related Art Conventionally, when a dome made of reinforced concrete is constructed, a formwork such as a wooden form is previously built according to the thickness of the reinforced concrete wall as a dome wall, or a reinforcing bar is arranged inside the formwork. In order to bury the reinforcing bars, a form is filled with solid concrete and solidified.

[0003]

By the way, in the conventional dome construction method as described above, it is necessary to assemble a work scaffold to build a wooden formwork and the like. Also, there is a problem that the formwork and the scaffold are significantly large, and assembling and disassembling them significantly increase construction costs. The present invention
A dome construction method which aims to solve such a problem and which can form a reinforced concrete wall by a simple means without the need for assembling and disassembling a frame of a wooden formwork or a large-scale scaffold. The task is to provide

[0004]

In order to solve the above-mentioned problems, a dome construction method according to the present invention comprises a ring member horizontally supported by a plurality of columns standing on the ground, and a ring member having a larger diameter than the ring member. After providing an annular foundation constructed on the ground coaxially with the ring member, a support member is erected between the ring member and the annular foundation, and the bag member is supported by the support member. After inflating the bag member, arranging a reinforced mesh along the upper surface of the bag member and spraying ready-mixed concrete so as to bury the reinforced network, forming a reinforced concrete wall along the upper surface of the bag member, After the reinforced concrete wall is solidified, the bag member is contracted, and the bag member and the support member are detached from the ring member and the annular foundation.

In the above-described dome construction method of the present invention, at least a part of the dome is formed on the upper surface of the bag member by the expansion of the bag member supported by the support member bridged between the ring member and the annular base. A mold is formed, and fresh concrete is sprayed so as to bury the reinforcing steel network arranged along the upper surface of the bag member, and by solidification, the reinforced concrete wall forming the dome is easily formed without requiring a scaffold or the like. Become so.

At this time, if the construction is proceeded sequentially while forming the reinforced concrete wall so as to be symmetrical with respect to the ring member, the construction can be performed safely with a balance in strength.

In the case of constructing a large number of domes of the same shape and the same size, the above-mentioned support member and bag member can be used repeatedly, so that a gap between the above-mentioned ring member and the annular base is 36.
A bag member supported by the above-mentioned support member is provided so as to cover the entire surface over 0 degrees, and a reinforced concrete wall forming an entire dome wall is cast on the upper surface of the expanded bag member at a stretch, greatly shortening the construction period. It can also be shortened.

Further, according to the dome construction method of the present invention, first, the support member and the bag member partially cover the space between the ring member and the annular foundation, and after the reinforced concrete wall on the upper surface of the bag member is solidified, the same. After shrinking the bag member,
The bag member is turned along with the support member along the ring member and the annular foundation, and then the bag member is expanded again.After that, a reinforced concrete wall is formed along the upper surface of the bag member. After forming the required reinforced concrete wall between the ring member and the annular foundation,
The bag member and the support member are detached from the ring member and the annular foundation.

The above-described method of constructing a dome is advantageous when a single dome is constructed, and is used repeatedly by rotating a small number of support members and a bag member around the ring member and the annular foundation. Therefore, the construction cost of the dome can be reduced.

[0010] In the dome construction method of the present invention, a central bag member that covers the inner space of the ring member is provided and inflated, and a reinforcing mesh is disposed on the upper surface of the central bag member so that the reinforcing mesh is buried. By spraying ready-mixed concrete, a top reinforced concrete wall is formed along the upper surface of the central bag member, and after the top reinforced concrete wall is solidified,
The center bag member is contracted and removed.

Regarding the opening inside the ring member,
By making the ring member small in diameter, it can be easily covered with an umbrella-shaped roof or the like, but as in the above-described dome construction method of the present invention, a central bag member that covers the internal space of the ring member is provided. In the method of placing a top reinforced concrete wall on the upper surface of the inflated central bag member, even if the ring member has a large diameter, the work of closing the internal opening of the ring member can be performed simply and inexpensively. become.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dome construction method according to one embodiment of the present invention will be described below with reference to the drawings.
1 is a perspective view showing a construction state of a dome under construction according to the method of the present invention, FIG. 2 is a perspective view showing a completed state of the dome of FIG. 1,
FIG. 3 is a longitudinal sectional view of a dome under construction according to the method of the present invention;
FIG. 4 is a plan view showing a main part of the dome of FIG. 3, and FIG. 5 is a sectional view taken along line AA of FIG.

In the dome construction method according to the present embodiment, first, the ring member 2 is horizontally supported by the plurality of columns 1 on the ground G. Further, an annular base 3 having a larger diameter than the ring member 2 is constructed on the ground G coaxially with the ring member 2.

Next, four support members 4 which form a pair in the left, right, front and rear directions are provided between the ring member 2 and the annular base 3 at an interval of 45 degrees, and the size of each support member 4 itself is determined. Are also set to have a central angle of 45 degrees. Then, over the entire surface of each support member 4, the bag member 5
Are supported by the same support member 4, and each bag member 5 is inflated using an air compressor (not shown).

In this way, after each bag member 5 is in an inflated state rounded upward, the reinforcing bar net 6a is arranged on the upper surface of the bag member 5, and the reinforcing bar net 6a is embedded. By spraying fresh concrete, a reinforced concrete wall 6 is formed along the upper surface of each bag member 5 as a dome wall.

After the stiffening of the reinforced concrete wall 6, each bag member 5 is contracted and then swiveled 45 degrees along the ring member 2 and the annular base 3 together with the support member 4.

Next, after each bag member 5 is inflated again,
Along the upper surface of the bag member, a reinforced concrete wall 6 is formed by distributing the reinforced mesh 6a and spraying ready-mixed concrete, and is joined to the reinforced concrete wall 6 which has been solidified first.

Thus, the reinforced concrete wall 6 is formed over 360 degrees. The inner space of the ring member 2 is also expanded at the required time by providing a central bag member 5a that covers the internal space, and a reinforcing bar mesh 7a is arranged on the upper surface of the central bag member 5a, and the reinforcing bar network 7a is removed. The fresh concrete is sprayed so as to be buried, and the top reinforced concrete wall 7 is formed. Then, after the top reinforced concrete wall 7 is solidified, the central bag member 5a is contracted and removed.

As the sheet forming each of the above bag members 5, 5a, a sheet made of fiber reinforced plastic and having a thickness of about 2 to 3 mm is used.

A wet concrete injection nozzle mounted on an aerial work vehicle (not shown) is used for spraying the ready-mixed concrete, and a compressed air pipe and a ready-mixed concrete feed pipe are connected to the nozzle. The operation of spraying the ready-mixed concrete is performed sequentially from the low-rise portion connected to the annular foundation 3 to the high-rise portion. In order to obtain a required wall thickness, the spraying operation of the ready-mixed concrete is divided into two or three times. It is done.

Further, after the reinforced concrete walls 6 and 7 are solidified, the reinforced material is pulled, the ends of the reinforced concrete material are locked to the concrete material, and a compressive stress is applied to the concrete material to form a prestressed concrete wall. In order to allow relative movement with the concrete material, an operation is performed in which a cloth or a soft tube is previously applied to the outer periphery of the required reinforcing material, or a lubricant coating is applied.

After the construction is completed, the support member 4, the bag members 5, 5a are removed, and the pillar 1 is also removed, thereby completing the dome.

In the dome construction method of the present embodiment described above,
When the bag member 5 supported by the support member 4 bridged between the ring member 2 and the annular foundation 3 expands, at least a part of the dome is formed on the upper surface of the bag member 5 and the bag member is formed. Fresh concrete is sprayed so as to embed the reinforcing steel net 6a distributed along the upper surface of 5, and the solidification thereof allows the reinforced concrete wall 6 to be easily formed without requiring a wooden frame or a scaffold.

At this time, as shown in FIGS. 1 and 3, when the construction is carried out sequentially while forming the reinforced concrete wall 6 so as to be symmetric with respect to the ring member 2, the construction can be balanced and the construction can be carried out safely. Can do it.

When a large number of domes of the same shape and the same size are to be constructed, the above-mentioned support member 4 and bag member 5 can be used repeatedly.
A bag member 5 supported by the support member 4 is provided so as to cover the entire surface over 60 degrees.
The reinforced concrete wall 6 forming the entire dome wall can be cast at a stretch to greatly shorten the construction period.

Further, the dome construction method of this embodiment
It is advantageous in the case of a single dome construction to use a construction method in which a part of the entire circumference, for example, a partial reinforced concrete wall 6 extending about 45 degrees is sequentially cast between the ring member 2 and the annular foundation 3. Yes, a small number of support members 4 and bag members 5
Can be repeatedly used so as to be swung around the ring member 2 and the annular foundation 3, so that the construction cost of the dome can be reduced.

The opening inside the ring member 2 can be easily covered with an umbrella-shaped roof or the like by making the ring member 2 small in diameter. As described above, the bag member 5a that covers the internal space of the ring member 2 is provided, and the reinforcing mesh 7a is disposed on the upper surface of the expanded bag member 5a, and the reinforced concrete wall 7 is cast by spraying fresh concrete. Even if the ring member 2 has a large diameter, the work for closing the internal opening of the ring member 2 can be performed simply and inexpensively.

[0028]

As described above, according to the dome construction method of the present invention, the following effects can be obtained. (1) Due to the expansion of the bag member supported by the support member bridged between the ring member and the annular base, at least a part of the mold of the dome is formed on the upper surface of the bag member, and the upper surface of the bag member The fresh concrete is sprayed so as to bury the reinforcing steel mesh arranged along the, and the solidification thereof allows the reinforced concrete wall forming the dome to be easily formed without requiring a scaffold or the like. (2) If the construction is proceeded sequentially while forming the reinforced concrete wall so as to be symmetrical with respect to the ring member, the construction can be performed safely with a balance in strength. (3) When constructing many domes of the same shape and the same size, the above-mentioned support member and bag member can be used repeatedly, so that the entire space between the above-mentioned ring member and the annular base extends over 360 degrees. It is also possible to provide a bag member supported by the support member so as to cover it, and to cast a reinforced concrete wall forming the entire dome wall on the upper surface of the inflated bag member at once, thereby greatly shortening the construction period. (4) The cost can be reduced even when a single dome is constructed by repeatedly using the support member and the bag member around the ring member and the annular foundation. (5) In the construction method in which a central bag member that covers the internal space of the ring member is provided and a top reinforced concrete wall is cast on the inflated upper surface of the central bag member, even if the ring member has a large diameter, the same ring is used. Work for closing the internal opening of the member is performed simply and inexpensively.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a construction state of a dome under construction according to the method of the present invention.

FIG. 2 is a perspective view showing a completed state of the dome of FIG. 1;

FIG. 3 is a longitudinal sectional view of a dome under construction according to the method of the present invention.

FIG. 4 is a plan view showing a main part of the dome of FIG. 3;

FIG. 5 is an AA plane view of FIG. 4;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pillar 2 ring member 3 annular foundation 4 support member 5 bag member 5 a central bag member 6 reinforced concrete wall 6 a reinforced mesh 7 top reinforced concrete wall 7 a reinforced mesh G ground

Claims (4)

[Claims] A ring member horizontally supported by a plurality of pillars standing on the ground, and an annular foundation constructed on the ground coaxially with the ring member and having a larger diameter than the ring member. A support member is erected between the ring member and the annular base, the bag member is supported by the support member, and after the bag member is inflated, a reinforcing mesh is arranged along the upper surface of the bag member. Spraying ready-mixed concrete so as to bury the reinforced mesh, thereby forming a reinforced concrete wall along the upper surface of the bag member, and shrinking the bag member after the reinforced concrete wall is solidified, thereby allowing the bag member and the support member to contract. A dome construction method, wherein the dome is removed from the ring member and the annular foundation. 2. The dome construction method according to claim 1, wherein the construction is sequentially performed while forming the reinforced concrete wall so as to be symmetrical with respect to the ring member. 3. The dome construction method according to claim 1 or 2, wherein the support member and the bag member partially cover the space between the ring member and the annular foundation, and the reinforced concrete on the upper surface of the bag member. After the wall is solidified, the bag member is contracted, and then the bag member is rotated along with the support member along the ring member and the annular foundation, and then the bag member is expanded again. A reinforced concrete wall is formed along the same manner, and a required reinforced concrete wall is formed between the ring member and the annular foundation in the same procedure as described above, and then the bag member and the support member are removed from the ring member and the annular foundation. A method for constructing a dome, comprising removing the dome. 4. The dome construction method according to claim 1, wherein a central bag member that covers an inner space of the ring member is provided and inflated, and a reinforcing bar mesh is also provided on an upper surface of the central bag member. By arranging and spraying ready-mixed concrete so as to bury the same reinforced mesh, a top reinforced concrete wall is formed along the upper surface of the central bag member, and after the top reinforced concrete wall is solidified, the central bag member is shrunk. A method for constructing a dome, comprising removing the dome.