JPH11336095A - Construction of base isolation building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the term of works by a method wherein permanent sub-structural columns are erected by inversed placing method, and installation of base isolation devices and construction of the lowermost skeleton for an upper structure are executed in precedence with the permanent sub-structural columns utilized. SOLUTION: Earth retaining walls 1 are provided at the circumference of a base isolation building, and permanent sub-structural base columns 2 are constructed under columns of the base isolation structure and permanent sub-structural columns 3 are inserted respectively into the base columns before hardening. Then, base isolation devices 4 are fixed respectively to the tops of the columns 3 that are exposed with the ground excavated at the inside of the walls 1 and as occasion demands, the devices 4 are fixed to the upside of bearing members 11 provided in projection at the walls 1. After a foundation slab 51 serving as the lowermost skeleton of an upper structure 5 is constructed on the devices 4, or in parallel with the construction, the ground below the devices 4 is excavated, and after a foundation slab 62 or the like for a lower structure 6 is constructed at the bottom of excavation, columns 61 are erected, extending from the slab 62 to the devices 4. Then, construction of skeletons for remaining parts above the slab 51 is executed, following the construction of the slab 51, in parallel with excavation of the ground, or after construction of skeletons for the lower structure 6. Thereby, construction of the upper structure can be started without waiting for completion of construction of the lower structure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a base-isolated building whose upper structure is supported by a base-isolation device.

[0002]

2. Description of the Related Art In the construction of a base-isolated building in which the upper structure is supported by seismic isolation devices, the construction target of the building is cut off, the construction of piles and the construction of the lower structure are completed. After that, the seismic isolation device is installed on the lower structure and the upper structure is constructed, but the construction of the lower structure can not be started until the excavation is completed, and until the construction of the lower structure is completed Since the construction of the superstructure cannot be started, the completion of the building requires a construction period that is the same as the period required for each construction.

[0003] In view of the above background, the present invention proposes a method of constructing a base-isolated building that can shorten the construction period.

[0004]

According to the present invention, a timber column is installed by the reverse striking method, and the installation of the seismic isolation device and the construction of the lowermost frame of the upper structure are performed in advance using the tall column. The construction of the lower structure and the construction of the upper structure are made independent, and the construction of the upper structure can be started without waiting for the completion of the construction of the lower structure, thereby shortening the construction period.

Prior to the installation of the trussed pillar, a trussed pillar for supporting the trussed pillar is constructed below the pillar of the seismic isolation building, and the trussed pillar is inserted into the trussed pillar before the hardening thereof. In order to make root cuts for the construction of the substructure,
A retaining wall is constructed. The construction of the retaining wall and the construction of the truss pillar are performed in parallel or before and after.

[0006] When the seismic isolation device is arranged between the ground floor and the basement floor, the seismic isolation device is installed at the head of the trussed pillar after the trussed pillar is inserted into the trussed pedestal pillar. The lowermost frame of the superstructure is built on top. After or simultaneously with the construction of the superstructure, the ground under the seismic isolation device is excavated and excavated,
Under the seismic isolation device, a substructure frame is constructed.

[0007] Seismic isolation is achieved by building the lower frame of the upper structure continuously after the lower frame of the upper structure is built, or by building the remaining frame of the upper structure after the building of the lower structure. The building is completed.

In some cases, the seismic isolation device is connected in advance to the head of the trussed pillar. In this case, after construction of the trussed pillar and before its hardening, the trussed pillar with the seismic isolation device connected to the head is inserted into the trussed pillar, and then the lowermost part of the superstructure is placed on the seismic isolation device. Is built.

When the seismic isolation device is placed under the basement floor,
The seismic isolation device is connected to the middle part of the shaft. In this case, after the construction of the truss pillar, before the curing, the truss pillar to which the seismic isolation device is connected is inserted into the truss pillar. Also in this case, the construction of the retaining wall is performed in parallel with or before or after the construction of the truss pillar.

[0010] After the timber pillar is inserted, the ground above the seismic isolation device is excavated and excavated, and the lowermost frame of the upper structure is constructed on the seismic isolation device. The ground under the seismic isolation device is excavated and excavated in parallel with or after the construction of the lowermost frame of the superstructure, and the substructure frame is constructed under the seismic isolation device. After constructing the skeleton of the lower structure, the seismic isolation building is completed by the vertical columns being separated vertically with the seismic isolation device in between.

[0011] In any of claims 1 to 3,
After the construction of the lowermost structure of the upper structure, the construction of the remaining structure of the upper structure and the root cutting and the construction of the lower structure can be performed in parallel. By performing the operations in parallel, the construction period can be shortened.

When the seismic isolation device is also supported on the mountain retaining wall, a receiving member is protruded from the inner peripheral side of the mountain retaining wall after the mountain retaining wall is constructed as described in claim 4, and the seismic isolation device is mounted on the receiving member. A seismic device will be installed.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction procedure of a base-isolated building will be described with reference to FIGS.

As shown in FIG. 1, a mountain retaining wall 1 is constructed at an outer peripheral position of a seismic isolation building, and a trussed pillar 2 for supporting a trussed pillar 3 is constructed below a column of the seismic isolated building. Mountain retaining wall 1
For example, pillar columns and underground continuous walls are used, and trussed pillars 2 are constructed by cast-in-place concrete piles and ground improvement by stirring and mixing.

After the construction of the stanchion 2, the truss 3 is inserted into the stanchion 2 before curing. The trussed pillar 3 is inserted until its head reaches a depth corresponding to the level of the lowermost frame of the upper structure 5 supported by the seismic isolation device 4, and the head is higher than the level of the lowermost frame bottom. It is located at a level lower by the height of the seismic isolation device 4.

Subsequently, as shown in FIG. 2, the ground in an area surrounded by the retaining wall 1 is excavated until the head of the timber pillar 3 is exposed, and after excavating the ground, as shown in FIG. The seismic isolation device 4 is installed on the head of No. 3 and fixed to the head of the truss 3. Although a laminated rubber bearing is shown as the seismic isolation device 4 in the drawings, the seismic isolation device 4 of the present invention is used together with a seismic isolation bearing in addition to a laminated rubber bearing, a sliding bearing, a rolling bearing, and the like. Damper is included.

The seismic isolation device 4 may be connected on the head of the trussed pillar 3 in advance before the trussed pillar 3 is inserted into the trussed pillar 2. Seismic isolation device 4
Installation is completed.

FIG. 9 shows an example in which the seismic isolation device 4 and the head of the trussed pillar 3 are joined. Here, a plate 7 for supporting the seismic isolation device 4 is fixed on the head of the trussed pillar 3 with bolts 8, and a filler plate 9 is directly or directly interposed between the plate 7 and the plate 7. The lower flange 41 is joined. The lower flange 41 penetrates through the lower flange 41 and the plate 7 and is fixed to the plate 7 by anchor bolts 10 protruding below the plate 7 for fixing the lower structure 6 to the column 61.

In FIG. 9, the bolt 8 penetrating the lower flange 41 is connected to the anchor bolt 10 so that the lower flange 41 of the seismic isolation device 4 can be joined to the anchor bolt 10 previously fixed to the column 61 or the like. It is screwed into a nut 81 integrated with the upper end.

When the seismic isolation device 4 is also supported on the retaining wall 1, as shown in FIG. 2, a receiving member 11 is protruded from the inner peripheral side of the retaining wall 1 along with the insertion of the straight pillar 3, and the receiving member 11 is provided. The seismic isolation device 4 is installed on 11 and fixed. The receiving member 11 projects from the retaining wall 1 in a beam shape or a slab shape, and is constructed such that the top end thereof is the same as the top end of the straight pillar 3.

In FIG. 2, the left receiving member 11 shows an example of engagement with the mountain retaining wall 1 when the retaining wall 1 is a column row pile, and the right receiving member 11 shows an example of engagement with the mountain retaining wall 1 when the underground continuous wall is used. When the retaining wall 1 is a pillar pile, cut off part of the soil mortar or concrete,
The receiving member 11 is supported by the retaining wall 1 by welding a stud bolt 12 or an anchor bolt to a steel core inserted into the inside and casting concrete.

Also in the case of an underground continuous wall, a part of the concrete of the retaining wall 1 is cut off, the anchor bar 13 is fixed therein, and the concrete is cast and the receiving member 11 is supported by the retaining wall 1.

The seismic isolation device 4 is fixed to the receiving member 11 by placing an anchor bolt 10 on the receiving member 11 before placing the receiving member 11 in concrete. This is performed by screwing a bolt 8 that penetrates through the lower flange 41 to the nut 81 that has been formed.

After the seismic isolation device 4 is installed, as shown in FIG. 4, a foundation slab 51 and a foundation beam, or a foundation slab 51 and a foundation beam, which are the lowermost frame of the upper structure 5, are constructed on the seismic isolation device 4. I do.

In FIG. 4, a clearance is secured between the right retaining wall 1 and the frame of the upper structure 5 to avoid collision of the upper structure 5 with the retaining wall 1 when the upper structure 5 is displaced relative to the lower structure 6. In order to achieve this, the spacing member 14 is arranged, but the clearance can be secured by cutting off the lowermost skeleton of the upper structure 5 or a part of the top of the retaining wall 1. There is also a case where the lowermost skeleton is constructed while using the retaining wall 1 as a formwork, such as the connection with the wall 1.

After or at the same time as the construction of the lowermost frame of the upper structure 5, the ground under the seismic isolation device 4 is excavated as shown in FIG. And is discharged through an opening (not shown). Excavation is performed to the depth of the foundation slab 62 of the substructure 6.

After excavating and discharging the ground, a foundation slab 62 of the substructure 6 or a foundation slab 62 and an underground beam are constructed at the bottom of the root as shown in FIG. 6, and subsequently, as shown in FIG. The pillar 61 is constructed from the slab 62 to the seismic isolation device 4. At this time, if necessary, the formwork 16 is installed between the foundation slab 62 and the receiving member 11, and the earth pressure wall 15 is built up on the inner peripheral side of the retaining wall 1.

Thereafter, a clearance is secured between the lowermost frame of the upper structure 5 and the retaining wall 1 as shown in FIG. As described above, the clearance is obtained by removing the spacing member 14, or by cutting the inner peripheral side of the top of the retaining wall 1 or the lowermost frame of the upper structure 5, or by removing the spacing member 14, It is formed by shaving the retaining wall 1 and the upper structure 5.

The remaining body of the upper structure 5 above the foundation slab 51 is constructed after the construction of the foundation slab 51, in parallel with the excavation of the ground, and also after the construction of the body of the lower structure 6.

10 to 12 show that the superstructure 5 has a basement floor,
The construction procedure when the seismic isolation device 4 is arranged below the basement floor is shown. In this case, the seismic isolation device 4 is connected to the middle part of the truss column 3, and the truss column 3 remains in the truss column 2 until the seismic isolation device 4 is located near the top end of the truss column 2. Inserted.

In this case, for the arrangement of the seismic isolation device 4, the trussed pillar 3 has the main members 31 located at the four corners on the cross section as shown in FIG. 10 and FIG. , Adjacent main material
Assembled from lattice material 32 erected between 31,31.
From the insertion of the trussed pillar 3 into the trussed pedestal pillar 2 to the construction of the foundation slab 51 of the superstructure 5 on the seismic isolation device 4,
Is protected from soil and water by an iron plate or the like (not shown) assembled around the box.

The lower flange 41 and the upper flange 42 of the seismic isolation device 4 have anchor bolts 10 for fixing to the column 61 and the foundation slab 62 of the lower structure 6 or the truss pillar 2 and the foundation slab of the upper structure 5. Anchor bolt 10 for fixing to 51 and pillar 52 is attached.

After the trussed pillar 3 is inserted into the trussed pillar 2, excavation and earth removal from the surface to the installation position of the seismic isolation device 4 are performed.
On the seismic isolation device 4, a lowermost frame such as the foundation slab 51 of the upper structure 5 is constructed.

Construction of the skeleton, such as the base slab 61 of the lower structure 6 below the seismic isolation device 4, is performed in parallel with or before or after the construction of the lowermost skeleton of the upper structure 5. The truss pillar 2 is used as it is as the pillar 61 of the lower structure 6.

After the construction of the lowermost frame of the upper structure 5 and the frame of the lower structure 6, the timber pillar 3 straddles the upper structure 5 and the lower structure 6 with the seismic isolation device 4 interposed therebetween. In order to allow the relative displacement of the upper structure 5 with respect to 6, the section of the truss pillar 3 at the height of the seismic isolation device 4 is cut off as shown in FIG. Are separated vertically.

In this case, too, the basic slab 51 of the upper structure 5
The remaining upper frame is constructed after the construction of the base slab 51, in parallel with the construction of the frame of the lower structure 6, and also after the construction of the frame of the lower structure 6.

[0037]

According to the first, third and fourth aspects of the present invention, a straight pillar is installed by a reverse striking method, and a seismic isolation device is installed using the straight pillar and the lowermost frame of the upper structure is installed. By leading the construction, the construction of the lower structure and the construction of the upper structure are made independent, so that the construction of the upper structure can be started without waiting for the completion of the construction of the lower structure, thereby shortening the construction period.

According to the second aspect, since the seismic isolation device is connected to the head of the straight pole in advance, the construction is further simplified.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a stage where construction of a retaining wall and a truss pillar and insertion of the truss pillar have been completed.

FIG. 2 is a cross-sectional view showing a stage where primary root cutting and projecting of a receiving member are completed.

FIG. 3 is a cross-sectional view showing a stage where installation of the seismic isolation device is completed.

FIG. 4 is a cross-sectional view showing a stage where the construction of the lowermost frame of the upper structure has been completed.

FIG. 5 is a cross-sectional view showing a stage at which secondary root cutting is completed.

FIG. 6 is a cross-sectional view showing a stage where the construction of the base slab having the lower structure has been completed.

FIG. 7 is a cross-sectional view showing a stage where the construction of the pillars of the lower structure has been completed.

FIG. 8 is a cross-sectional view showing a stage in which a clearance has been formed between the skeleton of the upper structure and the retaining wall.

FIG. 9 is an elevation view showing an example of a connection between a seismic isolation device and a timber pillar.

FIG. 10 is a cross-sectional view showing a stage where insertion of the trussed pillar is completed when the seismic isolation device is arranged in the middle of the trussed pillar.

FIG. 11 is a sectional view taken along line xx of FIG. 10;

FIG. 12 is a cross-sectional view illustrating a state in which a seismic isolation device installation portion of a straight pillar is cut off.

[Explanation of symbols]

1 ... Mounting wall, 2 ... Structural pillar, 3 ... Structural pillar, 31 ...
… Main material, 32… Lattice material, 4 …… Seismic isolation device, 41 …… Lower flange, 42 …… Upper flange, 5 …… Upper structure, 51…
... foundation slab, 52 ... pillar, 6 ... substructure, 61 ... pillar,
62… basic slab, 7… plate, 8… bolt, 81
... Nut, 9 ... Filler plate, 10 ... Anchor bolt, 11 ... Receiving member, 12 ... Stud bolt, 13 ...
… Anchor bars, 14… spacer, 15… earth pressure walls, 16…
... forms.

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[Procedure amendment]

[Submission date] April 23, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0034

[Correction method] Change

[Correction contents]

Construction of the skeleton such as the foundation slab 51 of the lower structure 6 under the seismic isolation device 4 is performed in parallel with or before or after the construction of the lowermost skeleton of the upper structure 5. The truss pillar 2 is used as it is as the pillar 61 of the lower structure 6.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kimitoshi Sano Kashima Construction Co., Ltd. 1-2-7 Moto-Akasaka, Minato-ku, Tokyo

Claims (4)

[Claims] The present invention relates to a seismic isolation building, wherein a mountain retaining wall is constructed at an outer peripheral position of the seismic isolation building, and a trussed pillar for supporting the trussed pillar is constructed below the pillar of the seismic isolated building. After being inserted into the trussed pillar, the seismic isolation device is installed at the head of the trussed pillar, and the lowermost frame of the superstructure is constructed on the seismic isolation device, while the ground below the seismic isolation device is excavated. ， Construction method of seismic isolation building that removes earth and constructs substructure frame under seismic isolation device. 2. A seismic retaining wall is constructed at an outer peripheral position of the seismic isolation building, and a trussed pillar for supporting the trussed pillar is constructed below the pillar of the seismic isolated building. After inserting the trussed pillar to which the seismic device is connected into the trussed stanchion, construct the lowermost frame of the superstructure on the seismic isolation device, and excavate and discharge the ground under the seismic isolation device. Construction method of seismic isolation building to build a substructure frame below seismic isolation device. 3. A mountain retaining wall is constructed at an outer peripheral position of the seismic isolation building, and a trussed pillar for supporting the trussed pillar is constructed below the pillars of the seismic isolated building. After inserting the trussed pillar to which the seismic device is connected into the trussed stanchion, the ground above the seismic isolation device is excavated and excavated, and the lowermost frame of the superstructure is constructed on the seismic isolation device. After excavating and excavating the ground under the seismic isolation device, constructing a substructure frame under the seismic isolation device, and then separating the vertical columns vertically across the seismic isolation device . 4. A seismic isolation device according to claim 1, wherein after the construction of the retaining wall, a receiving member is protruded on the inner peripheral side of the retaining wall, and the seismic isolation device is installed on the receiving member. Construction method of earthquake building.