JP2016011520A - Horizontal movement restraining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal movement restraining method of an existing building capable of securing horizontal holding bearing force, by inexpensively restraining the horizontal movement of the building in a construction period, without reducing working efficiency, even when the outer periphery of the existing building canot be sufficiently excavated.SOLUTION: A horizontal movement restraining method comprises Steps S1 and S2 for forming an excavation space 63, Steps S3 and S4 for constructing a mat slab 21 on a bottom surface of this excavation space 63 and a Step S5 of providing a temporary receiving column 70 on this mat slab 21 and joining a horizontal movement restraining material 80 for restraining the relative movement to the mat slab 21 of the existing building 1, to the respective mat slab 21 and 1 existing building by anchor bolts 821 and 845 between the mat slab 21 and the existing building 1.

Description

  The present invention relates to a horizontal movement restraining method for securing horizontal holding strength by restraining horizontal movement of an existing building during construction, for example, when making an existing building having existing piles seismic isolation.

Conventionally, there has been known a base-isolated retrofit construction for making an existing building base-isolated under the foundation (see Patent Document 1).
In this foundation seismic isolation retrofit work, the foundation is temporarily excavated under the foundation of the existing building, and a support work is erected on the excavated part, and a reaction force is applied to the bottom of the excavated part. Then, attach a seismic isolation device such as laminated rubber directly under the foundation, and then remove the jack. As a result, the base is supported by the seismic isolation device and the existing building is seismically isolated.

Here, the work of excavating directly under an existing building is as follows.
That is, a mountain retaining wall is constructed outside the existing building, and the ground between the mountain retaining wall and the outer wall surface of the existing building is excavated to a position deeper than the foundation of the existing building. Thereby, excavation space is formed in the side of the existing building. Then, it digs horizontally from near the bottom of this side excavation space, and forms an excavation space directly under the foundation of this existing building.
At this time, in the excavation space on the side of the existing building, a horizontal movement restraint material such as steel or slab is installed between the existing building and the mountain retaining wall to restrain the horizontal movement of the existing building (Patent Document) 1).

JP 2001-349065 A

By the way, the conveyance work in the vertical direction, such as the input of materials such as temporary materials and the carry-out of earth and sand, is performed using a lifting machine through an excavation space formed along the outer periphery of the existing building. As a result, there is a problem that the horizontal movement restraining material is positioned on the vertical movement path of the material and the earth and sand, which hinders the vertical conveyance work and lowers the work efficiency.
Moreover, horizontal movement restraint materials, such as a steel material and a slab, are supported by the mountain retaining wall and the existing building at both ends. Therefore, there is a problem that it is necessary to secure the rigidity of the horizontal movement restraining material itself or to join the horizontal movement restraining material firmly to the mountain retaining wall or the existing building, which increases the construction cost.

  Furthermore, in order to support the horizontal movement restraint material on the mountain wall, it is necessary to excavate the outer periphery of the existing building to form an excavation space, but when the site area is small, along the outer periphery of the existing building There was a possibility that the excavation could not be performed sufficiently and the horizontal movement restraint material could not be provided.

There are two basic seismic isolation retrofits: a suburban seismic isolation retrofit that has a large site and a sufficient excavation of the outer periphery, and an urban seismic isolation retrofit that has a small site and cannot fully excavate the outer periphery.
Even if the outer periphery of an existing building cannot be excavated sufficiently, the present invention can secure horizontal holding strength by restraining horizontal movement of the building during construction without lowering work efficiency and at low cost. It aims at providing the horizontal movement restraint method of the existing building.

  The present inventor conducted the basic seismic isolation retrofit work for existing buildings from the first excavation to the completion of pressure-resistant panel placement, from the completion of pressure-resistant panel placement to the completion of the seismic isolation upper case, and after the completion of the seismic isolation upper case. It was classified into three. In these processes, from the completion of the installation of the pressure-proof panel to the completion of the seismic isolation upper frame, horizontal movement between the existing building and the new installation (pressure panel) is a method to ensure horizontal holding strength after the completion of the seismic isolation upper frame. Focusing on the ability to restrain the horizontal movement of an existing building by providing restraints, the inventors have invented a horizontal movement restraining method capable of ensuring a predetermined horizontal holding strength.

  The horizontal movement restraining method according to claim 1 is a horizontal movement restraining method for restraining the horizontal movement of an existing building when the existing building (for example, an existing building 1 described later) is subjected to seismic isolation. A step (for example, steps S1 and S2 to be described later) for excavating a ground (for example, a later-described ground 6) below the building to form a drilling space (for example, a later-described drilling space 63), and a bottom surface of the excavation space A step (for example, steps S3 and S4, which will be described later) for constructing a pressure plate (for example, a mat slab 21 to be described later), and a temporary receiving material (for example, to be described later) for temporarily supporting the existing building on the pressure plate. A horizontal movement restraining material (for example, horizontal movement restraining materials 80 and 90 described later) is provided between the pressure platen and the existing building and restrains relative movement of the existing building with respect to the pressure platen. ) Preliminary wherein each anchor bolt existing buildings (e.g., anchor bolts 821,845,911,931 described later) step of joining (e.g., step S5 will be described later), characterized in that it comprises a a.

  Here, in the present invention, the existing building has an existing pile (for example, an existing pile 4 described later), and after the step of joining to the pressure platen and each of the existing building with an anchor bolt, A seismic isolation device (e.g., between the step of removing the pile head and cutting the edge between the existing pile and the existing building (e.g., step S <b> 6 described later) and the pressure platen and the lower surface of the existing building) A step of providing a seismic isolation device 30 described later (for example, step S7 described later) may be further included.

According to this invention, the horizontal movement restraint material which restrains the movement with respect to the pressure board of the existing building was provided between the newly installed pressure board and the lower surface of the existing building. Thereby, the horizontal movement of the existing building during a construction period is restrained, and horizontal holding strength can be secured.
In addition, since the horizontal movement restraint material is provided on the pressure plate rather than the excavation space on the outer periphery of the existing building, that is, the vertical work work space for the construction material, the horizontal movement restraint material can be easily used when transporting the construction material. Since it can avoid, it can prevent that work efficiency falls.

In addition, since the horizontal movement restraint material is disposed directly under the existing building, the horizontal movement restraint material can be easily installed at a necessary location even when the outer periphery of the existing building cannot be excavated sufficiently.
In addition, since the horizontal movement restraint material is joined to the existing building on the upper surface and joined to the pressure platen on the lower surface, the rigidity of the horizontal movement restraint material itself can be ensured as in the past, or the existing building or pressure board can be strengthened. Since it is not necessary to join, a horizontal movement restraint material becomes a simple structure, and construction cost can be reduced.

Further, in the case where the horizontal movement restraining material is formed by laminating a plurality of members, the arrangement of bolts that join these members is determined as follows.
That is, the horizontal resistance force between the existing building and the pressure platen by the horizontal movement restraint material is obtained by multiplying the shear strength of a single bolt that joins a plurality of members constituting the horizontal movement restraint material by the number of bolts. It is done. Therefore, the bolt arrangement may be determined so that the horizontal resistance exceeds the required holding strength of the existing building.

  The horizontal movement restraining method according to claim 2 is characterized in that the horizontal movement restraining material (for example, a later-described horizontal movement restraining material 80) is a first wall-like member (for example, a later-described first extending member) extending upward from the pressure platen. 1 H-section steel 81, foundation 82, and first L-shaped steel plate 83), and a second wall-like member that extends downward from the lower surface of the existing building and overlaps the first wall-like member (For example, a second H-shaped steel 84 and a second L-shaped steel plate 85 described later), and the first wall-shaped member and the second wall-shaped member are bolted together. It is characterized by.

According to the present invention, since the wall-shaped members of the horizontal movement restraint material are arranged so as to overlap each other, when bolting the wall-shaped members or when releasing the bonding between the wall-shaped members, the position of the bolt is determined. Since it can be easily confirmed visually, work efficiency is improved and a bolt arrangement plan can be easily created.
Further, the bolt hole may be a long hole in the height direction, and the relative height between the wall-shaped members may be adjustable in the construction stage.

  The horizontal movement restraint method of the existing building according to claim 3, wherein the horizontal movement restraint member (for example, a later-described horizontal displacement restraint member 90) is a plurality of H-section steels (for example, to be described later) stacked horizontally. A plurality of H-section steels are joined together with bolts.

According to this invention, the horizontal movement restraint material is configured to include a plurality of H-section steels that are horizontally placed and stacked. Therefore, since the horizontal movement restraint material can be composed of only steel materials having the same shape, manufacture is easier and cost can be reduced as compared with the case where steel materials having different shapes are combined.
Further, the necessary horizontal movement restraining force can be easily secured by fastening the flanges of the H-shaped steels with a predetermined number of bolts.
Moreover, since the H-section steel is a reusable temporary material, it can be diverted and the cost can be reduced.

  The horizontal movement restraint method of the existing building according to claim 4, wherein after the seismic isolation device is provided, a horizontal force transmission member that transmits a horizontal force is provided between the horizontal movement restraint material and the base of the seismic isolation device. It is characterized by providing.

  According to this invention, the horizontal force transmission member which transmits a horizontal force was provided between the horizontal movement restraint material and the foundation of the seismic isolation device. Therefore, the horizontal force by the existing building is transmitted to the horizontal movement restraining material and also transmitted to the base of the seismic isolation device via the horizontal force transmission member. Therefore, the horizontal movement of the existing building can be restrained more firmly, and the horizontal holding strength can be secured more.

  According to this invention, the horizontal movement restraint material which restrains the movement with respect to the pressure board of an existing building was provided between the newly installed pressure board and the lower surface of the existing building. Thereby, even if it is a case where the outer periphery of the existing building cannot fully be excavated, the horizontal holding | maintenance tolerance can be ensured by restraining the horizontal movement of the building in the construction period at low cost, without reducing work efficiency.

It is sectional drawing of the foundation part of the existing building where the horizontal movement restraint method concerning 1st Embodiment of this invention is applied. It is sectional drawing which shows the state by which the existing building which concerns on the said embodiment was seismically isolated. It is a flowchart of the procedure which seismically isolates the existing building which concerns on the said embodiment. It is FIG. (1) for demonstrating the procedure which makes the existing building which concerns on the said embodiment seismic isolation. It is FIG. (2) for demonstrating the procedure which makes the existing building which concerns on the said embodiment a seismic isolation. It is AA sectional drawing of FIG. It is FIG. (3) for demonstrating the procedure which makes the existing building which concerns on the said embodiment a seismic isolation. It is the front view and side view of the horizontal movement restraint material which concern on the said embodiment. It is FIG. (4) for demonstrating the procedure which makes the existing building which concerns on the said embodiment seismic isolation. It is FIG. (5) for demonstrating the procedure to make the existing building based on the said embodiment a seismic isolation. It is the front view and side view of a horizontal movement restraint material which are used for the horizontal movement restraint method concerning a 2nd embodiment of the present invention. It is the front view and side view of a horizontal movement restraint material which are used for the horizontal movement restraint method concerning a 3rd embodiment of the present invention. It is a front view of the horizontal movement restraint material and horizontal force transmission member which are used for the horizontal movement restraint method which concerns on 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
The present invention is a means for securing the horizontal holding strength of an existing building during the seismic isolation repair work, and an invention relating to a method for restraining the horizontal movement of the existing building.
In the present invention, as a method for restraining the horizontal movement of the existing building 1, the foundation 82, the H-shaped steels 81 and 84, and the L-shaped steel plates 83 and 85 are laminated and arranged between the existing building 1 and the mat slab 21. They are joined by connecting means (bolts 834, 854, 855, anchor bolts 821, 815, 845). With this horizontal movement restraining method, the necessary holding strength of the existing building 1 during the construction period is secured with a simple configuration.

FIG. 1 is a cross-sectional view of a foundation portion of an existing building 1 to which a horizontal movement restraining method according to a first embodiment of the present invention is applied.
The existing building 1 has an underground frame 2, and the underground frame 2 includes a foundation 3 having an existing pile 4 and a plurality of pillars 5 extending upward from the foundation 3.

The foundation 3 includes a footing 10, a foundation beam 11 that connects these footings 10, and a pressure platen 12 provided between the foundation beams 11 (see FIG. 6).
The aforementioned pillar 5 extends upward from the center of the footing 10.

  About each footing 10 of the foundation 3, the five existing piles 4 are arrange | positioned (refer FIG. 6). One of these existing piles 4 is located at the center of the footing 10, and the rest is located at the peripheral edge of the footing 10.

In the present invention, as shown in FIG. 2, the base 3 of the existing building 1 is seismically isolated by installing a base isolation device 30 under the base 3 of the existing building 1.
Specifically, the structure is as follows.

That is, an installation space 20 for installing the seismic isolation device 30 is formed under the foundation 3 of the existing building 1.
On the bottom surface of the installation space 20, a mat slab 21 is constructed as a reinforced concrete pressure platen over the entire surface. A steel pipe pile 22 is driven directly under the footing 10 in the mat slab 21.
A lower seismic isolation foundation 31 made of reinforced concrete is provided on the upper surface of the mat slab 21 and immediately below the footing 10. Further, an upper seismic isolation base 32 made of reinforced concrete is provided on the lower surface of the foundation 3 and immediately below the footing 10. The above-described seismic isolation device 30 is provided between these seismic isolation foundations 31 and 32.

A seismic isolation pit 40 for securing horizontal movement of the existing building 1 is formed around the underground frame 2 of the existing building 1.
That is, a retaining wall 41 is formed around the underground housing 2, and the seismic isolation pit 40 is a space between the retaining wall 41 and the underground housing 2. The seismic isolation pit 40 is a space that continues to the installation space 20.

  A reinforcing housing 50 is constructed on the lower surface of the foundation 3 of the existing building 1, and a damper foundation 51 is constructed on the mat slab 21. An oil damper 52 is provided between the reinforcing housing 50 and the damper base 51.

The seismic isolation device 30 supports the center portion of the footing 10 of the foundation 3 from below by applying a reaction force to the mat slab 21 while keeping the foundation 3 movable in the horizontal direction.
Thereby, the existing building 1 can move horizontally within the range of the seismic isolation pit 40. That is, even if the existing building 1 moves horizontally, it does not collide with the retaining wall 41.
Further, when the existing building 1 shakes in the horizontal direction, the oil damper 52 resists and attenuates the shake.

FIG. 3 is a flowchart showing a procedure for isolating the foundation 3 of the existing building 1.
In step S1, the outer periphery of the existing building 1 is excavated.
That is, as shown in FIG. 4, a mountain retaining wall 61 is constructed outside the existing building 1, and the ground 6 between the mountain retaining wall 61 and the outer wall surface of the underground building 2 of the existing building 1 is excavated, While constructing the peripheral cutting beam 62, it is dug down to a position deeper than the foundation 3 of the existing building 1. Thereby, the excavation space 60 is formed in the side of the existing building.

In step S <b> 2, excavation is performed directly under the existing building 1.
That is, as shown in FIG. 4, the ground 6 is dug horizontally from near the bottom of the excavation space 60 to form an excavation space 63 directly below the foundation 3 of the existing building 1. Then, throw away concrete 23.

In step S3, the steel pipe pile 22 is laid.
That is, as shown in FIGS. 5 and 6, the steel pipe pile 22 is press-fitted on the discarded concrete 23 immediately below or near the pillar 5 of the existing building 1. Specifically, a hydraulic jack 64 is installed on the lower surface of the foundation 3, and the steel pipe pile 22 is press-fitted into the ground 6 with the hydraulic jack 64 using the foundation 3 as a reaction force.
This steel pipe pile 22 serves as a support pile for permanent installation. The pile head of the steel pipe pile 22 is exposed from the bottom surface of the excavation space 63.

In step S4, the mat slab 21 is constructed.
That is, as shown in FIG. 7, studs 24 are placed on the outer peripheral surface of the pile head of the steel pipe pile 22 and the outer peripheral surface of the existing pile 4.
Then, the bar is placed on the bottom surface of the excavation space 63, concrete is placed, and the mat slab 21 is constructed. Thereby, the portion in which the steel pipe pile 22 and the stud 24 of the existing pile 4 are placed is driven into the mat slab 21, and the steel pipe pile 22, the existing pile 4 and the mat slab 21 are firmly integrated.

In step S5, a temporary support post 70 and a horizontal movement restraining material 80 are installed as temporary support materials.
That is, as shown in FIG. 7, the temporary support column 70 is installed on the mat slab 21 at a position immediately below the pillar 5 of the existing building 1.
The temporary support post 70 includes a hydraulic jack 71 provided on the mat slab 21 and a vertical member 72 extending vertically from the hydraulic jack 71 to reach the lower surface of the foundation 3.
Next, by driving the hydraulic jack 71 of the temporary support post 70, the temporary support post 70 temporarily supports the foundation 3 from below by taking a reaction force on the mat slab 21.

FIG. 8 is a front view and a side view of the horizontal movement restraint member 80.
The horizontal movement restraint member 80 is disposed along the long side direction and the short side direction of the existing building 1, respectively.
The horizontal movement restraining member 80 is provided on the mat slab 21 and has a foundation 82 as a first wall member into which the first H-section steel 81 is driven, and a first wall extending upward from the foundation 82. A first L-shaped steel plate 83 as a member, a second H-section steel 84 as a second wall-shaped member provided on the lower surface of the foundation 3 of the existing building 1, and the second H-section steel 84 And a second L-shaped steel plate 85 as a second wall-shaped member that extends downward from the first wall-shaped member 83 and overlaps the first wall-shaped member 83.

The foundation 82 is made of reinforced concrete, and is joined to the mat slab 21 with a plurality of anchor bolts 821. In addition, in FIG. 8, the display of the reinforcement of the foundation 95 is abbreviate | omitted.
The H-shaped steel 81 has a lower flange 811, a web 812, and an upper flange 813, and stiffeners 814 are provided at predetermined intervals along the length direction.

The lower flange 811 of the H-shaped steel 81 is joined to the foundation 82 with a plurality of anchor bolts 815.
Further, the upper portion of the H-shaped steel 81 is exposed from the upper surface of the foundation 82, and a grout material 816 is filled between the upper flange 813 of the H-shaped steel and the upper surface of the foundation 82.

  The first L-shaped steel plate 83 has a substantially L-shaped cross section, a joining plate 831 joined to the upper flange 813 of the H-shaped steel 81 with a plurality of bolts 834, and a wall plate extending upward from the joining plate 831 832 and stiffeners 833 provided at predetermined intervals along the length direction.

The H-shaped steel 84 has a lower flange 841, a web 842, and an upper flange 843, and stiffeners 844 are provided at predetermined intervals along the length direction.
The upper flange 843 of the H-shaped steel 84 is joined to the lower surface of the foundation 3 with a plurality of anchor bolts 845.
Further, a grout material 846 is filled between the upper flange 843 of the H-shaped steel 84 and the lower surface of the foundation 3.

  The second L-shaped steel plate 85 has a substantially L-shaped cross section, a joining plate 851 joined to the upper flange 843 of the H-section steel 84 by a plurality of bolts 854, and a plate shape extending downward from the joining plate 851. Wall plates 852 and stiffeners 853 provided at predetermined intervals along the length direction.

  The wall plate 852 of the second L-shaped steel plate 85 is disposed so as to overlap the wall plate 832 of the first L-shaped steel plate 83, and the overlapped portion is joined by a plurality of bolts 855. These bolts 855 are arranged in a zigzag pattern in two rows in the horizontal direction. The wall plates 832 and 852 are formed with bolt holes through which these bolts 855 are inserted. These bolt holes are elongated in the height direction.

  The horizontal movement restraint member 80 restrains the horizontal movement of the existing building 1 with respect to the mat slab 21. Therefore, the required number of anchor bolts 821, anchor bolts 815, bolts 834, anchor bolts 845, bolts 854, and bolts 855 are stacked with the horizontal holding strength (shear strength) required for the existing building 1 during the construction period. It is calculated | required by remove | dividing by the maximum shear strength per one of each volt | bolt which joins between the member 81,82,83,84,85 made.

In step S6, as shown in FIG. 9, the pile head of the existing pile 4 is removed.
That is, the part exposed from the mat slab 21 among the pile heads of the existing pile 4 is cut and removed, and the edge between the existing pile 4 and the foundation 3 of the existing building 1 is cut. Thereby, the load of the existing building 1 is transmitted to the mat slab 21 via the temporary support column 70, and the horizontal movement of the existing building 1 is restrained by the horizontal movement restraining material 80.

In step S7, the seismic isolation device 30 is installed.
That is, as shown in FIG. 9, the lower base isolation base 31 is constructed on the mat slab 21 and immediately below the pillar 5 of the existing building 1, and the base isolation device 30 is installed on the lower base isolation base 31. To do. Subsequently, the upper base isolation base 32 is constructed on the base isolation device 30.

In step S8, the temporary support column is removed.
That is, as shown in FIG. 10, the hydraulic jack 71 of the temporary support post 70 is driven to jack down, the temporary support by the temporary support post 70 is released, and then the temporary support post 70 is removed. Thereby, the foundation 3 of the existing building 1 is supported by the seismic isolation device 30.

In step S9, the oil damper 52 is installed.
That is, as shown in FIG. 10, the reinforcing housing 50 is constructed on the lower surface of the foundation 3 of the existing building 1. In addition, a damper foundation 51 is constructed on the mat slab 21, and an oil damper 52 is installed between the reinforcing housing 50 and the damper foundation 51.

  In step S10, the horizontal movement restraint member 80 is removed, and the retaining wall 41 is constructed as shown in FIG.

According to this embodiment, there are the following effects.
(1) A horizontal movement restraining member 80 that restrains the movement of the existing building 1 relative to the mat slab 21 is provided between the newly established mat slab 21 and the lower surface of the existing building 1. Thereby, the horizontal movement of the existing building 1 during a construction period is restrained, and horizontal holding strength can be ensured.
Further, since the horizontal movement restraining material 80 is provided on the mat slab 21 instead of the excavation space on the outer periphery of the existing building 1, that is, the construction work conveying space in the vertical direction, the horizontal movement restraining material 80 is transported when the construction material is transported. Since 80 can be easily avoided, it is possible to prevent a reduction in work efficiency.

Moreover, since the horizontal movement restraint material 80 is arranged directly under the existing building 1, even when the outer periphery of the existing building 1 cannot be excavated sufficiently, the horizontal movement restraint material 80 can be easily installed at a necessary place.
Moreover, since the horizontal movement restraint material 80 is joined to the existing building 1 on the upper surface and joined to the mat slab 21 on the lower surface, the rigidity of the horizontal movement restraint material itself can be ensured as in the prior art, or the existing building or pressure platen can be secured. Therefore, the horizontal movement restraint member 80 has a simple structure, and the construction cost can be reduced.

  (2) Since the L-shaped steel plates 83 and 85 of the horizontal movement restraining material 80 are arranged so as to overlap each other, when joining the L-shaped steel plates 83 and 85 with the bolt 855, the joining of the L-shaped steel plates 83 and 85 is released. In this case, since the arrangement position of the bolt 855 can be easily confirmed visually, the work efficiency is improved and the arrangement plan of the bolt 855 can be easily created.

  (3) Since the first H-section steel 81 and the second H-section steel 84 are used for the horizontal movement restraint member 80, the L-shaped steel plates 83 and 85 constituting the horizontal movement restraint member 80 can be easily positioned, The horizontal movement restraint member 80 can be disassembled in a short period of time.

  (4) Since the bolt holes formed in the wall plates 832 and 852 are elongated holes in the height direction, the relative height between the L-shaped steel plates 83 and 85 can be easily adjusted in the construction stage.

[Second Embodiment]
In the present invention, as a method for restraining the horizontal movement of the existing building 1, the foundations 91 and 93 and the mountain main material 92 are laminated and arranged between the existing building 1 and the mat slab 21, and connecting means (bolts 927 and 928 are arranged). , Anchor bolts 911, 931, 925, and 926). With this horizontal movement restraining method, the necessary holding strength of the existing building 1 during the construction period is secured with a simple configuration.

FIG. 11 is a front view and a side view of the horizontal movement restraint member 90 according to the second embodiment of the present invention.
This embodiment is different from the first embodiment in that a horizontal movement restraining material 90 is provided instead of the horizontal movement restraining material 80.
That is, the horizontal movement restraint member 90 is composed of a lower foundation 91, a mountain retaining main material 92 as a plurality of H-shaped steels horizontally placed on the lower foundation 91, and the mountain retaining main material. And an upper base 93 provided on 92.

The lower foundation 91 is made of reinforced concrete, and is joined to the mat slab 21 with a plurality of anchor bolts 911.
The upper foundation 93 is made of reinforced concrete, and is joined to the lower surface of the foundation 3 with a plurality of anchor bolts 931.

The mountain retaining member 92 has a lower flange 921, a web 922, and an upper flange 923, and end plates 924 are provided on both end faces.
The lower flange 921 of the lowermost mountain retaining main member 92 is joined to the lower foundation 91 by a plurality of anchor bolts 925.
The upper flange 923 of the uppermost mountain retaining main member 92 is joined to the upper foundation 93 by a plurality of anchor bolts 926.

In the upper and lower mountain retaining materials 92, the upper flange 923 of the lower mountain retaining material 92 and the lower flange 921 of the upper mountain retaining material 92 are joined by bolts 927.
The horizontal mountain retaining material 92 in the horizontal direction is joined to the end plates 924 by bolts 928.

According to the present embodiment, in addition to the above-described effect (1), the following effect can be obtained.
(5) The horizontal movement restraining material 90 is configured to include a plurality of mountain retaining main materials 92 that are stacked horizontally. Therefore, since the horizontal movement restraint material 90 can be comprised only with the mountain retaining main material 92 of the same shape, compared with the case where the steel materials of a different shape are combined, manufacture is easy and cost can be reduced.
In addition, by fastening the flanges 921 and 923 of the mountain retaining main member 92 with a predetermined number of bolts, a necessary horizontal movement restraining force can be easily secured.
Moreover, since the mountain retaining material 92 is a divertable temporary material, the cost can be reduced.

[Third Embodiment]
FIG. 12 is a front view and a side view of the horizontal movement restraint member 94 according to the third embodiment of the present invention.
This embodiment is different from the first embodiment in that a horizontal movement restraining material 94 is provided instead of the horizontal movement restraining material 80.
That is, the horizontal movement restraint member 94 includes a foundation 95 as a first wall member provided on the mat slab 21 and a first L-shaped steel plate as a first wall member extending upward from the foundation 95. 96 and a second L-shaped steel plate 97 as a second wall-like member that extends downward from the lower surface of the foundation 3 of the existing building 1 and is disposed so as to overlap the first wall-like member 96.

  The foundation 95 is made of reinforced concrete, and is joined to the mat slab 21 with a plurality of anchor bolts 951. In addition, in FIG. 12, the display of the reinforcement of the foundation 95 is abbreviate | omitted.

  The first L-shaped steel plate 96 has a substantially L-shaped cross section, a joining plate 961 joined to the foundation 95 with a plurality of bolts 964, a wall plate 962 extending upward from the joining plate 961, and a length direction , And stiffeners 9633 provided at predetermined intervals.

The second L-shaped steel plate 97 has a substantially L-shaped cross section, a joining plate 971 joined to the lower surface of the foundation 3 with a plurality of bolts 974, and a plate-like wall plate 972 extending downward from the joining plate 971. And stiffeners 973 provided at predetermined intervals along the length direction.
Further, a grout material 975 is filled between the joining plate 971 of the second L-shaped steel plate 97 and the lower surface of the foundation 3.

  The wall plate 972 of the second L-shaped steel plate 97 is disposed so as to overlap the wall plate 962 of the first L-shaped steel plate 96, and the overlapping portions are joined by a plurality of bolts 976. These bolts 976 are arranged in a zigzag pattern in two rows in the horizontal direction. The wall plates 962 and 972 are formed with bolt holes through which these bolts 976 are inserted, and these bolt holes are elongated holes in the height direction.

  According to the present embodiment, there are the same effects as the above (1), (2), and (4).

[Fourth Embodiment]
FIG. 13 is a front view of the horizontal movement restraint member 94 and the horizontal force transmission member 73 according to the fourth embodiment of the present invention.
This embodiment differs from the third embodiment in that a horizontal force transmission member 73 is provided in addition to the horizontal movement restraining member 94.

That is, in step S <b> 8, the temporary support column is removed, and a horizontal force transmission member 73 that transmits a horizontal force is provided between the horizontal movement restraint member 94 and the foundations 31 and 32 of the seismic isolation device 30.
The horizontal force transmission member 73 includes a mountain retaining member 74 provided between the foundation 95 of the horizontal movement restraint member 94 and the lower seismic isolation base 31, the foundation 95 of the horizontal movement restraint member 94, and the upper seismic isolation base 32. , And a steel connecting member 76 that connects the mountain main members 74 and 75 to each other.

Non-shrinkable mortar 741 is filled in the gap between the mountain retaining main member 74 and the foundation 95 and the gap between the mountain retaining main member 74 and the lower base isolation base 31.
Non-shrinkable mortar 751 is filled in the gap between the mountain retaining main material 75 and the foundation 95 and the gap between the mountain retaining main material 75 and the upper base isolation base 32.
The connecting member 76 is connected to the mountain retaining materials 74 and 75 by bolts 761.

  According to this embodiment, in addition to the effects (1), (2), and (4) described above, the following effects can be obtained.

  (6) A horizontal force transmission member 73 that transmits a horizontal force is provided between the horizontal movement restraint member 94 and the seismic isolation foundations 31 and 32. Therefore, the horizontal force generated by the existing building 1 is transmitted to the horizontal movement restraint member 94 and also transmitted to the seismic isolation foundations 31 and 32 via the horizontal force transmission member 73. Therefore, the horizontal movement of the existing building 1 can be restrained more firmly and the horizontal holding strength can be ensured more.

It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
In the first embodiment described above, the first H-section steel 81 and the second H-section steel 84 are provided. However, the present invention is not limited to this, and the first H-section steel 81 and the second H-section steel 84 are provided. The first L-shaped steel plate 83 may be directly bonded to the foundation 82, or the second L-shaped steel plate 85 may be directly bonded to the lower surface of the existing building 1.

DESCRIPTION OF SYMBOLS 1 ... Existing building 2 ... Underground frame 3 ... Foundation 4 ... Existing pile 5 ... Pillar 6 ... Ground 10 ... Footing 11 ... Foundation beam 12 ... Pressure board 20 ... Installation space 21 ... Mat slab (pressure board)
22 ... Steel pipe pile 23 ... Discarded concrete 24 ... Stud 30 ... Base isolation device 31 ... Lower base isolation base 32 ... Upper base isolation base 40 ... Base isolation pit 41 ... Retaining wall 50 ... Reinforcement frame 51 ... Damper base 52 ... Oil damper 60 ... excavation space 61 ... mountain retaining wall 62 ... outer peripheral cutting beam 63 ... excavation space 64 ... hydraulic jack 70 ... temporary support column (temporary support material)
71 ... Hydraulic jack 72 ... Vertical member 73 ... Horizontal force transmission member 74 ... Yamadome main material 75 ... Yamadome main material 76 ... Connecting member 80 ... Horizontal movement restraint material 81 ... First H-section steel (first wall shape) Element)
82: Foundation (first wall member)
83 ... 1st L-shaped steel plate (1st wall-shaped member)
84 ... 2nd H-section steel (2nd wall-shaped member)
85 ... 2nd L-shaped steel plate (2nd wall-shaped member)
90 ... Horizontal movement restraint material 91 ... Lower base 92 ... Yamadome main material (H-section steel)
93 ... Upper foundation 94 ... Horizontal movement restraint material 95 ... Foundation (first wall-shaped member)
96 ... 1st L-shaped steel plate (1st wall-shaped member)
97 ... 2nd L-shaped steel plate (2nd wall-shaped member)

Claims (4)

A horizontal movement restraint method that restrains the horizontal movement of an existing building when the existing building is seismically isolated,
Excavating the ground below the existing building to form an excavation space;
Building a pressure-resistant panel on the bottom of the excavation space;
On the pressure platen, a temporary support material for temporarily supporting the existing building is provided, and a horizontal movement restraining material for restraining relative movement of the existing building with respect to the pressure platen between the pressure platen and the existing building. And a step of joining each of the pressure-resistant panel and the existing building with an anchor bolt. The horizontal movement restraining material, a first wall-like member extending upward from the pressure platen,
A second wall-like member that extends downward from the lower surface of the existing building and is disposed so as to overlap the first wall-like member,
The horizontal movement restraining method according to claim 1, wherein the first wall-shaped member and the second wall-shaped member are bolt-joined. The horizontal movement restraint material is configured to include a plurality of H-section steels stacked horizontally.
The horizontal movement restraining method according to claim 1, wherein the plurality of H-shaped steels are joined with bolts.   The horizontal force transmission member which transmits a horizontal force is provided between the said horizontal movement restraint material and the foundation of the said seismic isolation apparatus, after providing a seismic isolation apparatus. The horizontal movement restraint method described.

Images