JPH1113287A - Large space constructing method applying diagonal tension system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an all-weather great space constituting method as being capable of performing a constructing method for a multilayer great space underground structure and a constructing method for a ground structure right thereon at the same time. SOLUTION: A hollow main tower 1 having a height on a ground level 3 is constructed at the depth of a supporting ground 2 in an almost vertical direction, a mountain-retaining wall 4 is constructed in a ground on the outer periphery of the main tower 1 to reach the supporting ground 2 and a canopy truss 5 is set up on a ground level encircled by the mountain-retainign wall 4. The canopy truss 5 is suspended from the upper part of the main tower 1 with a diagonal member 6, the ground encircled by the mountain-retainign wall 4 is advanced to be drilled, the first underground floor 9 is constructed on the drilled bottom at the step when it is advanced to be drilled deeply enough to construct the first underground floor and the first underground floor 9 is suspended from the canopy truss 5 with a suspending material 10. The steps of drilling the ground, constructing the underground floor and suspending the underground floor with the suspending material 10 are repeated in a stepwise manner for construction to the lowest floor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention belongs to the technical field of a construction method of an underground structure having a large space with many columns and no pillars,
Furthermore, the construction method of large-scale underground structures with many layers,
The present invention relates to a large space construction method applying an all-weather type cable staying system, which can simultaneously carry out a method of constructing a ground structure directly above it.

[0002]

2. Description of the Related Art Conventionally, as a large space construction method capable of simultaneously executing a method of constructing a multi-story large space underground structure and a method of constructing an above-ground structure immediately above, for example, Japanese Patent Laid-Open No. No. 4,470,32 discloses that a truss beam prestressed at the ground level is erected on an existing track as a roof, and a truss beam also prestressed as an underground intermediate beam is erected on the existing track. A method for constructing an underground space is disclosed.

[0003]

[Problems to be Solved by the Invention]
The large space construction method described in Japanese Patent No. 7032 has several points to be improved in practical use. In order to implement the above construction method, it is an essential condition that at least one of the upper chord material and the lower chord material of the truss beam is prestressed. Therefore, it can be said that the span of the truss beam is inevitably limited, and accordingly, the size of the space of the underground structure is also limited. The work of laying the track for erection of the truss beams is an indispensable requirement and is very troublesome. In addition, the work for laying the truss beams on the track requires special care and is very troublesome. A large space can be constructed only on the ground floor, which is sandwiched between the ground-level truss beam and the truss beam as an intermediate beam. Therefore, it cannot be a so-called large space. Certainly, although the use of truss beams for the second floor of the basement and the like is disclosed, it is difficult to say that it is practical in consideration of the above.
In addition, there is no change in the pillars on the lower floor.

That is, according to the above-mentioned conventional construction method, it can be said that there is still room for study and development in the method of constructing a large space underground structure for each layer in multiple layers. Therefore, an object of the present invention is to apply a cable staying system, specifically, to suspend a canopy truss on the ground surface from a main tower with diagonal materials, thereby achieving higher work efficiency and a larger underground space than the conventional construction method. It is an object of the present invention to provide a method for constructing a multi-story, column-free underground structure capable of constructing an underground structure.

It is a further object of the present invention to provide an all-weather cable staying system capable of simultaneously implementing a method of constructing a multi-story large space underground structure and a method of constructing an above-ground structure immediately above it. It is to provide an applied construction method.

[0006]

As a means for solving the problem of the prior art, a large space construction method using the cable staying system according to the first aspect of the present invention is a hollow space having a height above the ground 3. A step of constructing the main tower 1 substantially vertically to the depth of the supporting ground 2, a step of constructing a retaining wall 4 reaching the supporting ground 2 in the outer peripheral ground of the main tower 1, A canopy truss 5 is installed on the ground surface, and a process of suspending the canopy truss 5 from the upper part of the main tower 1 with a diagonal member 6 and excavating the ground surrounded by the retaining wall 4 are performed. Main tower 1
At the stage of discharging to the ground through the hollow portion 1a of the above, and at the stage where the excavation has proceeded to the depth at which the floor of the first basement is constructed, the first basement floor 9 is formed on the excavation bottom surface 8; A step of suspending from the canopy truss 5 with the suspending material 10 and a step of repeating the steps of excavating the ground, constructing the underground floor, and suspending the underground floor with the suspending material one floor at a time to the floor of the lowest floor And characterized in that:

A large space construction method applying the cable staying system according to the second aspect of the present invention is a method of constructing a hollow main tower 1 having a height on the ground 3 substantially vertically to a depth of the supporting ground 2, A step of constructing a retaining wall 4 reaching the supporting ground 2 in the outer peripheral ground of the main tower 1, and installing a canopy truss 5 on the ground surface surrounded by the retaining wall 4; The process of hanging the diagonal 6 from the upper part of the tower 1 and the excavation of the ground surrounded by the retaining wall 4 are advanced.
a, and at the stage where the excavation has proceeded to the depth at which the floor of the first basement is constructed, a first basement floor 9 is constructed on the excavation bottom surface 8, and the first basement floor 9 is provided with the canopy truss. 5
From the ground to the floor of the lowest floor by repeating ground excavation, construction of the basement floor, and hanging the basement floor with the hanging material one floor at a time, A step of constructing a ground structure above the canopy truss 5 in parallel with the construction.

[0008] A large space construction method applying the cable staying system according to the invention of claim 3 is characterized in that the underground portion 1b of the main tower 1 according to claim 1 or 2 is constructed of an underground continuous wall. And The large space construction method applying the cable staying system according to the invention of claim 4 is characterized in that the retaining wall 4 described in claim 1 or 2 is constructed of an underground continuous wall.

A large space construction method applying the cable staying system according to the invention of claim 5 is characterized in that a film material is formed in a dome shape between the slant members 6 according to claim 1 or 2.

[0010]

Embodiments and examples of the present invention will be described below with reference to the drawings. FIG.
Shows a stage in which the main tower 1 having a hollow portion 1a having a cylindrical shape having a height enough to implement the cable staying system above the ground 3 is almost vertically extended to the depth of the supporting ground 2.
The shape of the main tower 1 may be a cylindrical shape in addition to a cylindrical shape. In this embodiment, the underground portion 1 of the main tower 1 is used.
b is constructed of underground diaphragm walls. This is because there is little noise and vibration due to the construction of the ground work and underground work, and the influence on the surrounding ground is also small.

FIG. 2 shows the construction of a retaining wall 4 that reaches the supporting ground 2 in the outer peripheral ground of the main tower 1 and a canopy truss 5 installed on the ground surface 3 surrounded by the retaining wall 4. The canopy truss 5 is provided with a plurality of diagonal members 6 such as cables from above the main tower 1.
Shows the stage of constructing the cable staying system suspended by. The retaining wall 4 is also constructed of an underground continuous wall in the same manner as the underground portion 1b of the main tower 1, and is generally installed in a substantially circumferential shape having the main tower 1 as a center. In addition, the said retaining wall 4 is not limited to a cylindrical shape, and may be a rectangular tube shape. The canopy truss 5
A three-dimensional truss constructed of upper chord, lower chord, and lattice. Of course, the contact portions of the trusses are integrally connected by bolting or the like. The canopy truss 5
Since it is hung from the upper part of the main tower 1 by a plurality of diagonal members 6 such as cables, it is not particularly necessary to apply prestressing to the upper chord material or the lower chord material in the canopy truss 5. In other words, the span of the canopy truss 5 can be increased arbitrarily by increasing the height of the main tower 1 above the ground and increasing the number of the diagonal members 6 to support it. The canopy truss 5 thus installed is used as an all-weather roof for underground work and a work floor for ground work by laying floor materials or the like on the upper surface.

FIG. 3 shows a stage in which the excavator 7 has excavated the ground surrounded by the retaining wall 4. The excavator 7 is carried in through the entrance 11 and the hollow portion (shaft) 1a provided in the main tower 1, and excavates the ground to a depth where the floor of the first basement is constructed as a permanent floor. As the excavator 7, a remote control type automatic excavator is preferably used. Excavated soil generated by the excavation is discharged to the ground through the entrance 11 and the hollow portion 1a.

FIG. 4 shows an excavated bottom surface 8 where the ground has been excavated to a depth at which the floor of the first basement floor is to be constructed as a permanent floor.
The floor 9 is constructed and a substantially central portion of the first basement floor 9 is suspended from the canopy truss 5 by a suspension member 10. There are various methods for constructing the underground first floor 9, but it is preferable to omit the unloading work of reinforcing bars, formwork, etc. For example, a construction method of directly constructing the first underground floor 9 on the excavation bottom surface 8 is preferable. It is. A tension member such as a cable or a wire is suitably used for the suspension member 10, and a plurality of (four in this embodiment) are disposed circumferentially at equal intervals. After the first basement floor 9 develops a predetermined strength, as the next means, as shown in FIG. 5, excavation of the ground is performed to further construct the second basement floor. In this case, the first basement floor 9 also functions as a cutting beam that supports the main tower 1 and the retaining wall 4 from inside.

Hereinafter, the steps of excavating the ground, constructing the basement floor, and suspending the basement floor with the suspending material 10 are repeated one floor at a time, and as shown in FIG. Build a large space. The excavated soil generated by the ground excavation is discharged to the ground through the entrance 11 and the hollow portion 1a of the main tower 1 each time. The excavator 7 excavates the ground to a depth at which the floor 12 at the lowest floor is constructed as a permanent floor, and then moves the ground to the ground through the entrance 11 of the main tower 1 and the hollow portion 1a. In this way, the floor directly above the basement floor to be constructed also serves as a girder, and is sufficiently and sufficiently supported by the hanging members 10 from the canopy truss 5, so that no pillars are required at all, and it is always as if the basement floor is one. Under the same conditions as when constructing a floor, construction of an underground floor can be carried out safely and efficiently in a manner similar to a reverse striking method. It is preferable that the floor 12 of the lowermost floor be a pressure-resistant slab so as to sufficiently exhibit the strength against tension of the hanging material 10. Also,
Depending on the span of the canopy truss 5, a large space can be formed by removing the hanging member 10 after the underground work is completed. It is to be noted that although illustration and explanation are omitted, the construction of the above-ground structure above the canopy truss 5 in parallel with the construction of such an underground structure portion is performed in the case of a known reverse striking method or the like. Is performed in the same manner as described above.

In addition, a so-called all-weather construction method, in which a dome-shaped roof is formed by stretching a film material between the diagonal members 6 so that the construction process is not delayed by the weather, may be carried out on the above-ground structure. it can. In addition, the dome roof provides a design for the appearance of the ground structure. FIG. 7 illustrates an example of a ground structure constructed according to the present embodiment. At the upper end of the main tower 1, a column capital 13 is provided to close the opening. The column caps 13 also provide an aesthetic design to the appearance of the above-ground structure. In addition, the hollow portion 1a of the main tower 1 is used as a multipurpose shaft or an elevator shaft for drainage, smoke exhaustion, transportation, or the like after the construction work is completed.

[0016]

[Effects of the present invention] According to the large space construction method applying the cable staying system according to the present invention, the work of laying the track for erection of the truss beam is not required at all, and the work efficiency is higher than the conventional method. The construction method of the underground structure which is excellent in quality can be implemented. By suspending the canopy truss on the ground surface from the main tower with diagonal material, the span of the canopy truss can be enlarged compared to the conventional construction method, a larger underground space can be constructed, and a multi-layer pillarless underground structure can be constructed. The construction method can be implemented. It is possible to simultaneously carry out the construction method of a large-scale underground structure with many layers and the construction method of the above-ground structure directly above it, and it is also possible to carry out an all-weather large space construction method .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a stage of constructing a main tower to a depth of a supporting ground.

FIG. 2 is a cross-sectional view showing a stage in which a canopy wall is constructed, a canopy truss is installed on the ground surface surrounded by the canopy wall, and the canopy truss is hung with diagonal material.

FIG. 3 is a cross-sectional view showing a stage where excavation of the ground has been advanced by an excavator.

FIG. 4 is a cross-sectional view showing a stage where a first basement floor is constructed.

FIG. 5 is a cross-sectional view showing a stage in which a first basement floor has been constructed and ground excavation has been further advanced.

FIG. 6 is a cross-sectional view showing a stage where the floor is constructed up to the lowest floor.

FIG. 7 is a schematic diagram illustrating an example of a structure constructed according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main tower 1a Hollow part 1b Underground part 2 Supporting ground 3 Ground 4 Retaining wall 5 Canopy truss 6 Diagonal material 7 Excavator 8 Excavation bottom surface 9 Basement floor 1 Floor 10 Suspension material 11 Entrance 12 Bottom floor 13 Column capital

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hiroshi Muto 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Naoko Mochizuki 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute (72) Inventor Masato Ujikawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Center

Claims (5)

[Claims] A step of constructing a hollow main tower having a height on the ground substantially vertically to a depth of a supporting ground; and a step of constructing a retaining wall reaching the supporting ground in an outer peripheral ground of the main tower. Installing a canopy truss on the ground surface surrounded by the retaining wall,
The step of suspending the canopy truss from above the main tower with diagonal material, the step of excavating the ground surrounded by the retaining wall, and the step of discharging excavated soil to the ground through the hollow portion of the main tower; At the stage where the depth of the floor of the first basement is constructed, a first basement floor is constructed on the excavated bottom surface, and the first basement floor is suspended from the canopy truss with a hanging material. A step of constructing a floor and repeating the step of suspending the basement floor with a suspending material for each floor to construct the floor of the lowest floor, the large space construction method applying a cable staying system. 2. A step of constructing a hollow main tower having a height on the ground substantially vertically to a depth of a supporting ground, and a step of constructing a retaining wall reaching the supporting ground in an outer peripheral ground of the main tower. Installing a canopy truss on the ground surface surrounded by the retaining wall,
The step of suspending the canopy truss from above the main tower with diagonal material, the step of excavating the ground surrounded by the retaining wall, and the step of discharging excavated soil to the ground through the hollow portion of the main tower; At the stage where the depth of the floor of the first basement is constructed, a first basement floor is constructed on the excavated bottom surface, and the first basement floor is suspended from the canopy truss with a hanging material. A step of constructing the floor and suspending the basement floor with a hanging material by one floor at a time to construct a floor on the lowest floor; and constructing a ground structure on the top of the canopy truss in parallel with the underground construction. A large space construction method using a cable staying system, characterized by comprising a step of proceeding. 3. The large space construction method according to claim 1 or 2, wherein the underground portion of the main tower is constructed of an underground continuous wall. 4. The large space construction method according to claim 1 or 2, wherein the retaining wall is constructed of an underground continuous wall. 5. A large space construction method applying the cable staying system according to claim 1 or 2, wherein a film material is formed in a dome shape between the slant members.