Isolator installation method

Abstract

To easily install an isolator even when a skeleton is constructed on an upper part before installing the isolator.SOLUTION: A separation space forming step of providing a separation space having a predetermined dimension between an upper structure and a lower structure and supporting the upper structure by a temporary receiving column; a support material removing step of separating the upper structure and the lower structure and removing a support material supporting the upper structure; a lower base installing step of installing a lower base on an upper surface of the lower structure in the separation space; An upper base temporary installation step of temporarily installing an upper base on a lower surface of the upper structure, an isolator installation step of installing an isolator between the lower base and the upper base, and an upper base permanent installation step of permanently installing the upper base.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an isolator installation method. [Background technology]

[0002] Seismic isolation devices are widely used as devices to suppress the vibrations that propagate from the ground to buildings during earthquakes. Seismic isolation devices are generally installed on a seismic isolation foundation that is integrated with the substructure (building foundation, underground beams, piles, mat slab, etc.). The seismic isolation foundation is constructed in a protruding position above the substructure.

[0003] A construction method has been proposed in which a seismic isolation foundation that protrudes above the substructure is constructed using precast concrete (PCa). The construction procedure for constructing a seismic isolation foundation using precast concrete involves first installing the seismic isolation lower foundation, then installing the seismic isolation device, and then installing the seismic isolation upper foundation. After that, the seismic isolation upper foundation is connected to the superstructure. This construction method reduces the amount of on-site work required to construct the seismic isolation foundation, while enabling high-quality construction.

[0004] In the construction method of constructing the seismic isolation foundation using precast concrete, when constructing a new building and then constructing the superstructure after the seismic isolation upper foundation is installed, there is sufficient space above the seismic isolation upper foundation once it has been installed, which makes it easy to use that space to connect the seismic isolation upper foundation and the superstructure. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-32759 [Patent Document 2] Japanese Patent Application Laid-Open No. 2011-47201 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in seismic isolation retrofit work, because a superstructure is constructed on top of the seismic isolation layer before the seismic isolation foundation is constructed, when carrying out the above-mentioned procedure, the work of installing the seismic isolation devices, including the construction of the seismic isolation foundation, is difficult. This problem is not limited to the case of installing seismic isolation devices in seismic isolation retrofit work, but is also the same when installing an isolator other than a seismic isolation device on any floor of an existing building. In other words, if a skeleton is constructed on top before the isolator is installed, the work of installing the isolator is difficult.

[0007] One object of the present invention is to easily install an isolator even if a structure is constructed above the isolator before the isolator is installed. Other objects of the present invention will become apparent from the description herein. [Means for solving the problem]

[0008] One aspect of the present invention is an isolator installation method comprising: a space forming step of providing a space of a predetermined dimension between an upper structure and a lower structure and supporting the upper structure with temporary support pillars; a support material removal step of separating the upper structure from the lower structure and removing the support material supporting the upper structure; a lower base installation step of installing a lower base on the upper surface of the lower structure in the space; an upper base temporary installation step of temporarily installing an upper base on the underside of the upper structure in the space; an isolator installation step of installing an isolator between the lower base and the upper base; and an upper base installation step of permanently installing the upper base.

[0009] Other features of the present invention will become apparent from the following description and drawings. [Effects of the Invention]

[0010] According to the above aspect of the present invention, the isolator can be easily installed even if a frame has been constructed above the isolator before the isolator is installed. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is an explanatory diagram showing an overview of an existing building 10. As shown in FIG. [Figure 2] FIG. 2 is a flow chart of the isolator installation method of this embodiment. [Figure 3] FIG. 3 is an explanatory diagram showing the state after the support material 13 has been removed. [Figure 4] FIG. 4 is an explanatory diagram showing the state after the lower base 14 has been installed on the upper surface of the lower structure 11. [Figure 5] FIG. 5 is a flow diagram showing the detailed procedure of the lower base installation step (S004). [Figure 6] FIG. 6 is an explanatory diagram showing the state in which the lower base 14 is temporarily placed above the lower structure 11. [Figure 7] FIG. 7 is an explanatory diagram showing how the lower plug-in connecting member 17 is inserted into the lower vertical communication hole 141. As shown in FIG. [Figure 8] FIG. 8 is an explanatory diagram showing the state after the lower base 14 has been suspended. [Figure 9] FIG. 9 is an explanatory diagram showing the state after the upper base 15 has been temporarily installed. [Figure 10] FIG. 10 is a flow diagram showing the detailed procedure of the upper base temporary installation step (S005). [Figure 11] FIG. 11 is an explanatory diagram showing the state in which the upper base 15 is temporarily placed above the lower base 14. [Figure 12] FIG. 12 is an explanatory diagram showing how the upper base 15 is raised and brought close to the underside of the superstructure 12 after connecting the upper base pre-connecting member 18 and the joint 52. [Figure 13] FIG. 13 is an explanatory diagram showing the state after the upper base 15 has been raised and brought close to the underside of the upper structure 12. [Figure 14] FIG. 14 is an explanatory diagram showing how the isolator 20 is pulled horizontally and the lower surface of the isolator 20 is connected to the upper surface of the lower base 14. [Figure 15]FIG. 15 is an explanatory diagram showing the state after the isolator 20 is installed between the lower base 14 and the upper base 15. As shown in FIG. [Figure 16] FIG. 16 is an explanatory diagram showing the state after the upper base 15 has been fully installed. [Figure 17] FIG. 17 is a flow diagram showing the detailed procedure of the upper base installation step (S007). [Figure 18] FIG. 18 is an explanatory diagram showing the state after the upper base 15 is lowered and the lower surface of the upper base 15 is brought into close contact with the upper surface of the isolator 20. As shown in FIG. [Figure 19] Fig. 19A is an explanatory diagram showing the state when filling material 16 starts to be injected into lower gap 140. Fig. 19B is an explanatory diagram showing the state when filling material 16 continues to be injected into lower gap 140. [Figure 20] Fig. 20A is an explanatory diagram showing the state when the filler 16 has been discharged from the lower gap side connection path 31. Fig. 20B is an explanatory diagram showing the state when the filler 16 has been discharged from all the connection paths. [Figure 21] FIG. 21 is an explanatory diagram showing the state when the injection of the filler 16 into the upper gap 150 begins. [Figure 22] FIG. 22 is an explanatory diagram showing the state when the filler 16 has been discharged from all the connection paths. DETAILED DESCRIPTION OF THE INVENTION

[0012] At least the following matters will become clear from the description of this specification and the accompanying drawings.

[0013] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The same or equivalent components, members, etc. shown in each drawing are designated by the same reference numerals, and redundant explanations will be omitted where appropriate.

[0014] ===This embodiment=== FIG. 1 is an explanatory diagram showing an overview of an existing building 10. As shown in FIG.

[0015] <<Definition of direction etc.>> First, with reference to FIG. 1, the directions and the like in an existing building 10 that is the target of the isolator installation method of this embodiment will be defined.

[0016] As shown in Figure 1, the vertical direction is referred to as the "up-down direction," the vertically upward direction is simply referred to as the "upward direction," and the vertically downward direction is simply referred to as the "downward direction." The horizontal direction is also the direction perpendicular to the up-down direction. In Figure 1, to make it easier to understand the directions in the existing building 10, the up-down direction and the horizontal direction are each represented by a line segment with a double-headed arrow.

[0017] The above definitions of directions and the like are common to other embodiments in this specification unless otherwise specified.

[0018] <<Summary>> Next, an overview will be given with reference to FIG.

[0019] As an example of an isolator installation method according to this embodiment, seismic isolation retrofit work will be described, in which the foundation or underground portion of an existing building 10 is renovated and a seismic isolation device is installed to reduce shaking of the building due to an earthquake or the like. For example, as shown in FIG. 1, a portion of the structure of the existing building (here, a foundation column 50) is cut between the upper and lower sides, and a seismic isolation device (an isolator 20, described later) is installed at the cut portion to seismically isolate the existing building 10. Note that in FIG. 1, the outline of the seismic isolation device (isolator 20) is indicated by a dashed line. In this embodiment, the lower side of the structure, defined by the position where a separation space S (described later) is formed, is called the substructure 11, and the upper side is called the superstructure 12.

[0020] In seismic isolation retrofit construction, a skeleton (superstructure 12) is constructed on top of the seismic isolation layer before the construction of the seismic isolation foundation (i.e., before the installation of the seismic isolation device). In this embodiment, even if a skeleton is constructed on top before the installation of the seismic isolation device, the seismic isolation device can be easily installed. However, examples to which the isolator installation method of this embodiment can be applied are not limited to the installation of a seismic isolation device in seismic isolation retrofit construction described below, but may also include the insertion of a member to raise (or lower) a part of a column of an existing building 10. In other words, the isolator installed by the isolator installation method of this embodiment may be any member, including a seismic isolation device. Therefore, according to the isolator installation method of this embodiment, the isolator can be easily installed even if a skeleton is constructed on top before the isolator is installed.

[0021] <<Isolator installation procedure>> The procedure of the isolator installation method of this embodiment will be explained below using an example of installing a seismic isolation device in seismic isolation retrofit construction.

[0022] Figure 2 is a flow diagram of the isolator installation method of this embodiment. Below, each step (S001 to S007) shown in Figure 2 will be explained using figures as necessary. Of the steps (S001 to S007) shown in Figure 2, steps S004 (lower base installation step), S005 (upper base temporary installation step), and S007 (upper base main installation step) each include more detailed steps. These detailed steps are indicated by double boxes in Figure 2, and will be described in detail as appropriate during the explanation of each step S004 (lower base installation step), S005 (upper base temporary installation step), and S007 (upper base main installation step).

[0023] <Reinforcement step, separation space formation step, and support material removal step> The procedure for the isolator installation method of this embodiment is as follows: first, the lower structure 11 and upper structure 12 of the existing building 10 are reinforced (S001; reinforcement step), a separation space is formed between the lower structure 11 and the upper structure 12 (S002; separation space formation step), and then the support material supporting the upper structure 12 is removed (S003; support material removal step).

[0024] Fig. 3 is an explanatory diagram showing the state after the support material 13 has been removed. Fig. 3 shows the state of the existing building 10 after the above-mentioned reinforcing step (S001), separation space forming step (S002), and support material removing step (S003).

[0025] Specifically, in the reinforcing step (S001) of this embodiment, as shown in FIG. 3, a lower reinforcing body 21 is provided so as to surround the end portions of the columns of the lower structure 11, and an upper reinforcing body 22 is provided so as to surround the end portions of the columns of the upper structure 12. The lower reinforcing body 21 and the upper reinforcing body 22 are made of, for example, reinforced concrete, but may also be made of other materials. Hereinafter, the lower structure 11 provided with the lower reinforcing body 21 may be collectively referred to as the "lower structure 11," and the upper structure 12 provided with the upper reinforcing body 22 may be collectively referred to as the "upper structure 12."

[0026] A joint 52 is installed in advance in the lower reinforcing body 21 of the substructure 11. The joint 52 installed on the substructure 11 side is, for example, a screw-type joint, and is a member to which a lower plug-in connector 17 (described later) is connected in a subsequent lower base installation step (S004). The hole of the joint 52 (the hole into which the lower plug-in connector 17 is screwed) communicates with a lower vertical communicating hole 141 (described later) formed in a lower base 14 (described later) installed on the upper surface of the substructure 11. For this reason, the hole of the joint 52 that communicates with the lower vertical communicating hole 141 may be collectively referred to as the lower vertical communicating hole 141.

[0027] In addition, a joint 52 is also installed in advance in the upper reinforcing body 22 of the superstructure 12. The joint 52 installed on the superstructure 12 side is also, for example, a screw-type joint, and is a component to which an upper base-prepared connecting material 18 (described later) is connected in a subsequent upper base temporary installation step (S005). The hole of the joint 52 (the hole into which the upper base-prepared connecting material 18 is screwed) communicates with an upper vertical communicating hole 151 (described later) formed in an upper base 15 (described later) installed on the underside of the superstructure 12. For this reason, the hole of the joint 52 that communicates with the upper vertical communicating hole 151 may be collectively referred to as the upper vertical communicating hole 151. The joint 52 installed on the superstructure 12 side may also be referred to as the "upper structure-prepared connecting material."

[0028] In addition, in the reinforcing step (S001), only one of the lower structure 11 and the upper structure 12 may be reinforced, or the reinforcing step (S001) may not be provided.

[0029] Specifically, in the separation space forming step (S002) of this embodiment, as shown in FIG. 3 , a separation space S of a predetermined dimension is provided between the lower structure 11 and the upper structure 12. The separation space S is a space in which the lower base 14 and the upper base 15 are installed in a subsequent process. The "predetermined vertical dimension of the separation space S" is the vertical dimension of the lower base 14 and the vertical dimension of the upper base 15 plus the dimension required for installing the lower base 14 and the upper base 15. The "dimension required for installing the lower base 14 and the upper base 15" also includes the required dimensions of the lower gap 140 (described below) and the upper gap 150 (described below) into which the filler 16 is filled, and the dimension required for inserting the lower plug-in connecting member 17 into the lower vertical communicating hole 141.

[0030] In the separation space forming step (S002) of this embodiment, as shown in Fig. 3, the upper structure 12 is supported by temporary support columns 23 so as to satisfy the predetermined vertical dimensions of the separation space S described above. The temporary support columns 23 are, for example, hydraulic jacks, and a load is applied in advance (preloaded) so that the temporary support columns 23 can support the upper structure 12.

[0031] In the support material removal step (S003) of this embodiment, the support material 13 (specifically, part of the column 50 shown in FIG. 1) that supports the superstructure 12 is cut and removed. Since the superstructure 12 was supported by the temporary support columns 23 in the preceding separation space formation step (S002), after the support material 13 is removed, the superstructure 12 will be supported only by the temporary support columns 23.

[0032] After the support material removal step (S003), as shown in FIG. 2, a lower base 14 is installed on the upper surface of the lower structure 11 in the space S between the above-mentioned lower structure 11 and upper structure 12 (S004; lower base installation step).

[0033] <Steps for installing the lower base> FIG. 4 is an explanatory diagram showing the state after the lower base 14 has been installed on the upper surface of the lower structure 11.

[0034] The lower base 14 is a member (seismic isolation lower foundation) that supports the lower part of the seismic isolation device (isolator 20). In this embodiment, a base plate 51 that supports the isolator 20 is installed on the upper surface of the lower base 14, and therefore the lower base 14 supports the isolator 20 via the base plate 51. The lower base 14 is formed from PCa (Precast Concrete). However, the lower base 14 may also be formed from site PC. Site PC is also called site PCa and refers to the fabrication of PCa on site. By forming the lower base 14 from PCa or site PC, the lower base 14 and the substructure 11 can be constructed separately.

[0035] A lower vertical communicating hole 141 is formed in the lower base 14. The lower vertical communicating hole 141 is a hole through which a lower plug-in connecting member 17 (described later) is inserted. When the lower base 14 is installed on the lower structure 11, the lower vertical communicating hole 141 on the lower base 14 side communicates with the hole of the joint 52 that has been installed in advance on the lower structure 11. In the lower base installation step (S004), the lower plug-in connecting member 17 is inserted into the lower vertical communicating hole 141 from above the lower base 14 and connected to the joint 52.

[0036] When the lower base installation step (S004) is completed, as shown in Fig. 4, the gap (lower gap 140 described below) formed between the upper surface of the lower structure 11 and the lower surface of the lower base 14 is filled with filler material 16 (grout material). Note that the filler material 16 is filled not only in the lower gap 140 but also in the lower vertical communicating hole 141 (specifically, the gap between the inner peripheral surface of the lower vertical communicating hole 141 and the outer peripheral surface of the lower insert connecting member 17 connected to the joint 52).

[0037] The following describes in detail the procedure for the lower base installation step (S004).

[0038] FIG. 5 is a flow diagram showing the detailed procedure of the lower base installation step (S004).

[0039] In the lower base installation step (S004), first, the lower base 14 is temporarily placed above the lower structure 11 (S101; lower base temporary placement step).

[0040] Fig. 6 is an explanatory diagram showing the state in which the lower base 14 is temporarily placed above the lower structure 11. Fig. 6 shows a schematic plan view of the temporarily placed lower base 14 as viewed from above and below.

[0041] 6, in the lower base temporary placement step (S101), the lower base 14 is pulled sideways (moved in a substantially horizontal direction) and temporarily placed above the lower structure 11. At this time, the lower base 14 is temporarily placed so that the lower vertical communication hole 141 on the lower base 14 side communicates with the hole of the joint 52 previously installed in the lower structure 11.

[0042] After the lower base temporary placement step (S101), the lower plug-in connecting member 17 is inserted into the lower vertical communication hole 141 from above the lower base 14 temporarily placed above the lower structure 11 (S102; lower plug-in connecting member insertion step).

[0043] FIG. 7 is an explanatory diagram showing how the lower plug-in connecting member 17 is inserted into the lower vertical communication hole 141. As shown in FIG.

[0044] After the lower base temporary placement step (S101), as shown in Fig. 7, brackets 24 and jacks 25 are attached to support the lower base 14 that has been temporarily placed above the substructure 11. Supporting the lower base 14 with the brackets 24 and jacks 25 allows stable work to be performed in the lower plug-in connector insertion step (S102) and the subsequent lower base suspending step (S103).

[0045] As described above, the separation space S formed between the lower structure 11 and the upper structure 12 has a predetermined dimension. Furthermore, in the lower plug connector insertion step (S102), a sufficient space is formed between the upper surface of the lower base 14 and the lower surface of the upper structure 12 to allow the lower plug connector 17 to be inserted into the lower vertical communicating hole 141. This makes it possible to easily insert the lower plug connector 17 into the lower vertical communicating hole 141. The lower plug connector 17 is then screwed into the hole of the joint 52 previously installed in the lower structure 11 to connect the lower plug connector 17 and the joint 52.

[0046] After the lower plug connecting member insertion step (S102), the lower base 14 is lowered until a lower gap 140 is formed (S103; lower base lowering step).

[0047] FIG. 8 is an explanatory diagram showing the state after the lower base 14 has been suspended.

[0048] As shown in Figure 8, a level spacer 53 is installed on the upper surface of the lower structure 11 from which the lower base 14 is suspended. The level spacer 53 is, for example, a height adjustment bolt, and is a horizontal holding member that supports the lower surface of the lower base 14. The lower base 14 is suspended until its lower surface abuts against the upper end of the level spacer 53. The level spacer 53 also functions as a horizontal holding mechanism that keeps the surface on which the base plate 51 installed on the upper surface of the lower base 14 supports the isolator 20 horizontal.

[0049] When the lower base hanging step (S103) is completed, a lower gap 140 is formed between the lower surface of the lower base 14 and the upper surface of the lower structure 11, as shown in Fig. 8. The lower gap 140 is a gap that will be filled with filler material 16 in a subsequent lower gap filling step (S104). The lower gap 140 is connected to a lower vertical communicating hole 141, and the filler material 16 injected into the lower gap 140 can also be injected into the lower vertical communicating hole 141.

[0050] After the lower base hanging step (S103), filler 16 is injected into a lower gap 140 formed between the lower surface of lower base 14 and the upper surface of lower structure 11 in separated space S (S104; lower gap filling step). As a result, filler 16 is filled into lower gap 140 and lower vertical communicating hole 141 (specifically, the gap between the inner peripheral surface of lower vertical communicating hole 141 and the outer peripheral surface of lower insert connecting member 17 connected to joint 52). Note that a method of filling filler 16 into lower gap 140 and lower vertical communicating hole 141 (a method of connecting lower structure 11 and lower base 14) will be described later.

[0051] According to the detailed procedure of the lower base installation step (S004) described above, the lower base 14 is installed on the upper surface of the lower structure 11 in the space S, as shown in Fig. 4. After the lower base installation step (S004), the upper base 15 is temporarily installed on the lower surface of the upper structure 12 in the space S between the lower structure 11 and the upper structure 12 described above, as shown in Fig. 2 (S005; upper base temporary installation step).

[0052] <Upper base temporary installation step> FIG. 9 is an explanatory diagram showing the state after the upper base 15 has been temporarily installed.

[0053] The upper base 15 is a member (seismic isolation upper base) that supports the upper part of the seismic isolation device (isolator 20). In this embodiment, a base plate 51 that supports the isolator 20 is installed on the underside of the upper base 15, and therefore the upper base 15 supports the isolator 20 via the base plate 51. The upper base 15 is formed from PCa (Precast Concrete). However, the upper base 15 may also be formed from site PC. Site PC is also called site PCa and refers to the fabrication of PCa on site. By forming the upper base 15 from PCa or site PC, the upper base 15 and the superstructure 12 can be constructed separately.

[0054] An upper vertical communication hole 151 is formed in the upper base 15. The upper vertical communication hole 151 is a hole through which an upper base-prepared connecting material 18 (described later) is inserted. When the upper base 15 is installed on the upper structure 12, the upper vertical communication hole 151 on the upper base 15 side communicates with the hole of a joint 52 pre-installed in the upper structure 12. In the upper base temporary installation step (S005), the upper base-prepared connecting material 18 pre-installed in the upper vertical communication hole 151 is connected to the joint 52 (upper structure-prepared connecting material) pre-installed in the upper structure 12.

[0055] 9, the upper base 15 is located in a raised position so as to be in close contact with the underside of the upper structure 12. However, the upper base 15 does not have to be in close contact with the underside of the upper structure 12, and may be in a raised position so as to be at least close to the underside of the upper structure 12 (it may be raised close).

[0056] The following describes in detail the procedure for the upper base temporary installation step (S005).

[0057] FIG. 10 is a flow diagram showing the detailed procedure of the upper base temporary installation step (S005).

[0058] In the upper base temporary installation step (S005), first, the upper base 15 is temporarily placed above the lower base 14 (S201; upper base temporary installation step).

[0059] Fig. 11 is an explanatory diagram showing how the upper base 15 is temporarily placed above the lower base 14. Fig. 11 shows a schematic plan view of the temporarily placed upper base 15 as viewed from above and below.

[0060] 11, in the upper base temporary placement step (S201), the upper base 15 is pulled sideways (moved in a substantially horizontal direction) and temporarily placed above the lower base 14. At this time, the upper base 15 is temporarily placed so that the upper vertical communication hole 151 on the upper base 15 side communicates with the hole of the joint 52 previously installed in the superstructure 12.

[0061] After the upper base temporary placement step (S201), the upper base pre-installed connecting material 18 installed in the upper vertical communicating hole 151 of the upper base 15 and the joint 52 (upper structure pre-installed connecting material) installed in the upper structure 12 are connected in the vertical direction (S202; pre-installed connecting material connection step).

[0062] FIG. 12 is an explanatory diagram showing how the upper base 15 is raised and brought close to the underside of the superstructure 12 after connecting the upper base pre-connecting member 18 and the joint 52.

[0063] As described above, the separation space S formed between the lower structure 11 and the upper structure 12 has a predetermined dimension. However, at the stage when the pre-connecting material connecting step (S202) is started, the lower base 14 has already been installed, and therefore there is not enough space formed between the lower surface of the upper base 15 and the upper surface of the lower base 14 to allow the upper base pre-connecting material 18 to be inserted into the upper vertical communicating hole 151 later.

[0064] Therefore, in the pre-connecting material connecting step (S202), before the upper base 15 is temporarily placed above the lower base 14 (S201), the upper base pre-connecting material 18 is pre-loaded into the upper vertical communicating hole 151 of the upper base 15. Then, in the pre-connecting material connecting step (S202), the upper base pre-connecting material 18 and the joint 52 loaded into the superstructure 12 are connected in the vertical direction. This allows the upper base pre-connecting material 18 to be inserted into the upper vertical communicating hole 151.

[0065] After the pre-connecting material connecting step (S202), the upper base 15 is raised and brought close to the lower surface of the upper structure 12 (S203; upper base raising and bringing close step).

[0066] FIG. 13 is an explanatory diagram showing the state after the upper base 15 has been raised and brought close to the underside of the upper structure 12.

[0067] When the upper base raising and approaching step (S203) is completed, as shown in Figure 13, a space is formed between the lower surface of the upper base 15 and the upper surface of the lower base 14 for installing the isolator 20 in the subsequent isolator installation step (S006).

[0068] After the upper base raising and approaching step (S203), as shown in Fig. 13, brackets 24 and jacks 25 are attached to support the upper base 15 that has been raised and brought close to the underside of the upper structure 12. By supporting the upper base 15 with the brackets 24 and jacks 25, the upper base 15 can be stably lowered and the underside of the upper base 15 can be brought into close contact with the upper surface of the isolator 20 in the subsequent upper base installation step (S007).

[0069] According to the detailed procedure of the upper base temporary installation step (S005) described above, the upper base 15 is temporarily installed on the underside of the upper structure 12 in the separation space S, as shown in Fig. 9. After the upper base temporary installation step (S005), the isolator 20 is installed between the lower base 14 and the upper base 15, as shown in Fig. 2 (S006; isolator installation step).

[0070] <Isolator installation steps> Fig. 14 is an explanatory diagram showing how the isolator 20 is pulled horizontally and the bottom surface of the isolator 20 is connected to the top surface of the lower base 14. Fig. 15 is an explanatory diagram showing the state after the isolator 20 has been installed between the lower base 14 and the upper base 15. Fig. 14 shows a schematic plan view of the isolator 20 being pulled horizontally, viewed from above and below.

[0071] As described above, the separation space S formed between the lower structure 11 and the upper structure 12 has a predetermined dimension. However, at the stage when the isolator installation step (S006) is started, the lower base 14 has already been installed and the upper base 15 has already been temporarily installed, so that a sufficient space is not formed between the upper surface of the lower base 14 and the lower surface of the upper base 15. Therefore, in the isolator installation step (S006), the isolator 20 can be pulled horizontally as shown in FIG. 14, so that the lower surface of the isolator 20 can be easily connected to the upper surface of the lower base 14.

[0072] 15, when the lower surface of isolator 20 is connected to the upper surface of lower base 14, a gap is formed between the upper surface of isolator 20 and the lower surface of upper base 15. Because this gap is formed, in a subsequent upper base installation step (S007), upper base 15 can be lowered and filler 16 can be injected into the resulting upper gap 150.

[0073] After the isolator installation step (S006), the upper base 15 is installed as shown in FIG. 2 (S007; upper base installation step).

[0074] <Upper base installation steps> FIG. 16 is an explanatory diagram showing the state after the upper base 15 has been fully installed.

[0075] When the upper base installation step (S007) is completed, as shown in Fig. 16, the filler material 16 (grout material) is filled in the gap (upper gap 150 described later) formed between the upper surface of the upper base 15 and the lower surface of the superstructure 12. Note that the filler material 16 is filled not only in the upper gap 150 but also in the upper vertical communicating hole 151 (specifically, the gap between the inner peripheral surface of the upper vertical communicating hole 151 and the outer peripheral surface of the upper base prepared connecting material 18 connected to the joint 52).

[0076] The following describes in detail the procedure for the upper base installation step (S007).

[0077] FIG. 17 is a flow diagram showing the detailed procedure of the upper base installation step (S007).

[0078] In the upper base installation step (S007), first, in the separated space S, the upper base 15 is lowered and the lower surface of the upper base 15 is brought into close contact with the upper surface of the isolator 20 (S301; isolator upper surface contact step).

[0079] FIG. 18 is an explanatory diagram showing the state after the upper base 15 is lowered and the lower surface of the upper base 15 is brought into close contact with the upper surface of the isolator 20. As shown in FIG.

[0080] 18, when the isolator upper surface adhering step (S301) is completed, an upper gap 150 is formed between the upper surface of the upper base 15 and the lower surface of the upper structure 12. The upper gap 150 is a gap that will be filled with filler material 16 in the subsequent upper gap filling step (S302). The upper gap 150 is connected to the upper vertical communicating hole 151, and the filler material 16 injected into the upper gap 150 can also be injected into the upper vertical communicating hole 151.

[0081] After the isolator upper surface contact step (S301), filler 16 is injected into the upper gap 150 formed between the upper surface of the upper base 15 and the lower surface of the upper structure 12 in the separated space S (S302; upper gap filling step). As a result, the filler 16 is filled into the upper gap 150 and the upper vertical communicating hole 151 (specifically, the gap between the inner peripheral surface of the upper vertical communicating hole 151 and the outer peripheral surface of the upper base-prepared connecting material 18 connected to the joint 52). Note that a method of filling the filler 16 into the upper gap 150 and the upper vertical communicating hole 151 (a method of connecting the upper structure 12 and the upper base 15) will be described later.

[0082] According to the detailed procedure of the upper base installation step (S007) described above, the upper base 15 is finally installed in the separated space S, as shown in Fig. 16. When the upper base installation step (S007) is completed, the procedure of the isolator installation method of this embodiment is completed. According to the isolator installation method of this embodiment, the isolator 20 can be easily installed even if a structure has been constructed above it before the isolator 20 is installed.

[0083] <<Method of connecting the fixed structure and the carry-in block>> As described above, in seismic isolation retrofit construction, a skeleton (superstructure 12) is constructed on top of the seismic isolation layer before the seismic isolation foundation is constructed. In this embodiment, even if a skeleton is constructed on top of the seismic isolation foundation before its construction, the already constructed skeleton can be easily connected to the seismic isolation foundation. However, this is not limited to the case of constructing a seismic isolation foundation in seismic isolation retrofit construction, and may also be the case of connecting a part of the existing building 10 (fixed structure) to a delivered block body (delivered block body). According to the method of connecting the fixed structure and the delivered block body of this embodiment, even if a fixed structure is constructed on top of the delivered block body, the fixed structure and the delivered block body can be easily connected.

[0084] In the following explanation, with regard to a connection method for connecting a fixed structure and a carry-in block body with a connecting material, an example in which the lower structure 11 and the lower base 14 are connected by injecting filler 16 (grout material) into a lower gap 140 between the lower structure 11 and the lower base 14, and an example in which the upper structure 12 and the upper base 15 are connected by injecting filler 16 (grout material) into an upper gap 150 between the upper structure 12 and the upper base 15, will be described in detail. Each of the lower structure 11 and the upper structure 12 corresponds to the "fixed structure," each of the lower base 14 and the upper base 15 corresponds to the "carry-in block body," and the filler 16 corresponds to the "connecting material."

[0085] <Method of connecting the lower structure 11 and the lower base 14> Fig. 19A is an explanatory diagram showing the state when injection of filler 16 into lower gap 140 begins. Fig. 19B is an explanatory diagram showing the state when injection of filler 16 into lower gap 140 continues. Fig. 20A is an explanatory diagram showing the state when filler 16 has been discharged from lower gap side connection path 31. Fig. 20B is an explanatory diagram showing the state when filler 16 has been discharged from all connection paths.

[0086] In the following, as a method of connecting the lower structure 11 and the lower base 14, the manner in which the filler 16 is filled into the lower gap 140 and the lower vertical communicating hole 141 in the lower gap filling step (S104) shown in FIG. 5 described above will be described in detail.

[0087] As shown in FIGS. 19A to 20B , the lower base 14 has a communication passage 144 therein. The communication passage 144 connects a side hole 142 formed in a side surface 146 of the lower base 14 with a horizontal connecting surface hole 143 formed in a bottom surface 147 of the lower base 14. The communication passage 144 is an injection path for the filler 16. The filler 16 supplied from an external filler supply source flows from the side hole 142 into the communication passage 144, passes through the communication passage 144, and flows out from the horizontal connecting surface hole 143 into the lower gap 140. In this way, the filler 16 is injected into the lower gap 140. The bottom surface 147 may be referred to as the "horizontal connecting surface." The horizontal connecting surface hole 143 is formed in the center of the bottom surface 147 of the lower base 14.

[0088] 19A to 20B, the side surface 146 of the lower base 14 of the lower gap 140 is covered by a formwork 43. This prevents the filler 16 from flowing out from the side surface 146 of the lower gap 140. However, the lower gap side surface connecting passage 31 is connected via the formwork 43, and the filler 16 that reaches the side surface 146 of the lower gap 140 can be discharged to the outside through the lower gap side surface connecting passage 31. Furthermore, as the filler 16 is injected into the lower gap 140 covered by the formwork 43, the pressure (air pressure) increases, so the lower gap side surface connecting passage 31 also functions as a path for venting air.

[0089] The lower gap 140 is in communication with the lower vertical communicating hole 141, and the filler 16 injected into the lower gap 140 from the horizontal connecting surface hole 143 can reach the lower vertical communicating hole 141. The lower vertical communicating hole 141 is sometimes referred to as a "communication path." The upper surface opening (upper surface hole 145) of the lower vertical communicating hole 141 is connected to the upper surface connecting path 32, and the filler 16 that reaches the upper surface hole 145 can be discharged from the upper surface hole 145 through the upper surface connecting path 32 to the outside.

[0090] In the method for connecting the fastening structure and the carry-in block body of this embodiment, first, an operator starts to inject filler 16 from an external filler supply source into lower gap 140. As shown in Fig. 19A, filler 16 flows from side hole 142 into communicating passage 144, passes through communicating passage 144, and flows out into lower gap 140 from horizontal connecting surface hole 143.

[0091] Next, the worker continues to inject filler 16 while checking for any leakage of filler 16. Then, as shown in FIG. 19B , filler 16 that has reached the side surface 146 of lower gap 140 flows into lower gap side surface connecting path 31. Furthermore, filler 16 injected into lower gap 140 also reaches lower vertical communicating hole 141, and as more filler material 16 is injected into lower gap 140, the surface of filler 16 at lower vertical communicating hole 141 rises.

[0092] 20A, the filler material 16 that has flowed into the lower gap side connection passage 31 is discharged from the outlet of the lower gap side connection passage 31. Also, as shown in FIG. 20B, the filler material 16 that has reached the upper surface hole 145 of the lower vertical communicating hole 141 flows into the upper surface connecting passage 32 connected to the upper surface hole 145 and is discharged from the outlet of the upper surface connecting passage 32. By confirming that the filler material 16 is discharged from the outlets of all the connecting passages (the outlets of the lower gap side connection passage 31 and the outlets of the upper surface connecting passage 32), the worker can confirm that the filler material 16 has been filled into the lower gap 140 and the lower vertical communicating hole 141.

[0093] When the worker confirms that the amount of discharged filler 16 has reached a predetermined amount (for example, about 10 liters), he / she ties off the outlets of all the connecting paths and completes the injection. After the injection is complete, the worker removes the formwork 43, buffer materials, etc., and molds the surface of the filler 16 in the upper surface hole 145 of the lower base 14 by about 2 mm to 3 mm below the upper surface of the lower base 14 so that the filler 16 does not leak out.

[0094] <Method of connecting the upper structure 12 and the upper base 15> Fig. 21 is an explanatory diagram showing the state when the injection of filler 16 into upper gap 150 is started. Fig. 22 is an explanatory diagram showing the state when filler 16 has been discharged from all connection paths.

[0095] Below, as a method of connecting the upper structure 12 and the upper base 15, we will explain how the filler 16 is filled into the upper gap 150 and the upper vertical communicating hole 151 in the upper gap filling step (S302) shown in Figure 17 above.

[0096] As shown in FIG. 21 , the upper base 15 has a communication passage 154 therein. The communication passage 154 connects a side hole 152 formed in a side surface 156 of the upper base 15 with a horizontal connecting surface hole 153 formed in an upper surface 157 of the upper base 15. The communication passage 154 is an injection path for the filler 16. The filler 16 supplied from an external filler supply source flows from the side hole 152 into the communication passage 154, passes through the communication passage 154, and flows out from the horizontal connecting surface hole 153 into the upper gap 150. In this way, the filler 16 is injected into the upper gap 150. The upper surface 157 may be referred to as the "horizontal connecting surface." The horizontal connecting surface hole 153 is formed in the center of the upper surface 157 of the upper base 15.

[0097] 21, the upper gap 150 is covered by a formwork 43 on the side surface 156 of the upper base 15. This prevents the filler material 16 from leaking out from the side surface 156 of the upper gap 150. However, the upper gap side surface connecting passage 41 is connected via the formwork 43, and the filler material 16 that reaches the side surface 156 of the upper gap 150 can be discharged to the outside through the upper gap side surface connecting passage 41. Furthermore, as the filler material 16 is injected into the upper gap 150 covered by the formwork 43, the pressure (air pressure) increases, so the upper gap side surface connecting passage 41 also functions as a path for venting air.

[0098] The upper gap 150 is in communication with the upper vertical communicating hole 151, so that the filler 16 injected into the upper gap 150 from the horizontal connecting surface hole 153 can reach the upper vertical communicating hole 151. The upper vertical communicating hole 151 is sometimes referred to as a "communication path." The opening on the lower surface side of the upper vertical communicating hole 151 (lower surface hole 155) is connected to the lower surface connecting path 42, so that the filler 16 that reaches the lower surface hole 155 can be discharged from the lower surface hole 155 through the lower surface connecting path 42 to the outside.

[0099] In the method of connecting the fastening structure and the carry-in block body of this embodiment, first, an operator starts injecting filler 16 from an external filler supply source into the upper gap 150. As shown in FIG. 21 , filler 16 flows from the side hole 152 into the connecting passage 154, passes through the connecting passage 154, and flows out into the upper gap 150 from the horizontal connecting surface hole 153. Next, the operator continues injecting filler 16 while checking for any leakage of filler 16. Then, as shown in FIG. 22 , the filler 16 reaches the side surface 156 of the upper gap 150, flows into the upper gap side connecting passage 41, and is discharged from the outlet of the upper gap side connecting passage 41.

[0100] Meanwhile, the filler material 16 injected into the upper gap 150 flows into the upper vertical communicating holes 151. As shown in Fig. 22, the filler material 16 flows into the lower connecting passage 42 connected to the lower hole 155 of the upper vertical communicating hole 151 and is discharged from the outlet of the lower connecting passage 42. The worker can confirm that the filler material 16 has been filled into the upper gap 150 and the upper vertical communicating holes 151 by checking that the filler material 16 is being discharged from the outlets of all the connecting passages (the outlets of the upper gap side connecting passage 41 and the outlets of the lower connecting passage 42).

[0101] Once the worker confirms that the amount of discharged filler 16 has reached a predetermined amount (for example, about 10 liters), he or she ties off the outlets of all the connecting passages and completes the injection. After the injection is complete, the worker removes the formwork 43, buffer materials, etc.

[0102] As described above, according to the method of connecting the fixing structure and the import block body of this embodiment, the fixing structure and the import block body can be easily connected even if the fixing structure is constructed on top of the import block body.

[0103] ===Summary=== According to the present specification, there is provided an isolator installation method having the following aspects.

[0104] (Aspect 1) Mode 1 is an isolator installation method including a space forming step of providing a space of a predetermined dimension between an upper structure and a lower structure and supporting the upper structure with temporary support pillars; a support material removal step of separating the upper structure from the lower structure and removing the support material supporting the upper structure; a lower base installation step of installing a lower base on the upper surface of the lower structure in the space; an upper base temporary installation step of temporarily installing an upper base on the underside of the upper structure in the space; an isolator installation step of installing an isolator between the lower base and the upper base; and an upper base installation step of permanently installing the upper base.

[0105] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0106] (Aspect 2) In a second aspect, the lower base installation step includes a lower gap filling step of injecting a filler into a lower gap formed between the lower surface of the lower base and the upper surface of the lower structure in the separated space.

[0107] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0108] (Aspect 3) In aspect 3, the lower base and the lower structure have lower vertical communicating holes that communicate in the vertical direction, and the lower base installation step includes, before the lower gap filling step, a lower plug-in connecting material insertion step in which a lower plug-in connecting material that connects the lower base and the lower structure is inserted into the lower vertical communicating hole from above the lower base, and a lower base suspending step in which the lower base is suspended until the lower gap is formed.

[0109] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0110] (Aspect 4) In aspect 4, the upper base and the upper structure have upper vertical communicating holes that communicate in the vertical direction, and the upper base temporary installation step includes an upper base temporary placement step in which the upper base is temporarily placed on the lower base, a connecting material connecting step in which an upper base connecting material inserted into the upper vertical communicating hole of the upper base and an upper structure connecting material inserted into the upper vertical communicating hole of the upper structure are connected in the vertical direction, and an upper base raising and approaching step in which the upper base is raised and approached to the underside of the upper structure.

[0111] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0112] (Aspect 5) In a fifth aspect, the isolator installation step includes connecting the lower surface of the isolator to the upper surface of the lower base by pulling the isolator horizontally.

[0113] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0114] (Aspect 6) In aspect 6, the upper base installation step includes an isolator upper surface adhesion step of lowering the upper base in the separated space to bring the lower surface of the upper base into close contact with the upper surface of the isolator, and an upper gap filling step of injecting a filler material into the upper gap formed between the upper surface of the upper base and the lower surface of the upper structure.

[0115] According to the above-described aspect, even if a structure has been constructed above the isolator before the isolator is installed, the isolator can be easily installed.

[0116] ===Other=== The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. [Explanation of symbols]

[0117] 10 Existing buildings 11 Undercarriage 12 Superstructure 13 Support material 14 Lower Base 15 Upper Base 16 Filler (connector) 17 Lower insert connector 18 Upper base connection material 20 Isolator 21 Lower reinforcement body 22 Upper reinforcement body 23 Temporary support pillar 24 Bracket 25 Jack 31 Lower gap side connection passage 32 Upper connecting road 41 Upper gap side connection passage 42 Lower connecting road 43 Formwork 50 pillars 51 Base Plate 52 Joint 53 Level Spacer 140 Bottom gap 141 Lower upper and lower communication hole (communication path) 142 Side hole 143 Horizontal connection surface hole 144 Communication path 145 Top hole 146 Side 147 Bottom surface 150 Upper gap 151 Upper and lower communication holes (communication passage) 152 Side hole 153 Horizontal connection surface hole 154 Communication path 155 Bottom hole 156 Side View 157 above S Distancing Space

Claims

1. a space forming step of providing a space of a predetermined dimension between the upper structure and the lower structure and supporting the upper structure with temporary support columns; a support material removal step of separating the upper structure and the lower structure and removing a support material that supports the upper structure; a lower base installation step of installing a lower base on an upper surface of the lower structure in the separated space; an upper base temporary installation step of temporarily installing an upper base on a lower surface of the upper structure in the separated space; an isolator installation step of installing an isolator between the lower base and the upper base; an upper base installation step of actually installing the upper base; An isolator installation method comprising:

2. the lower base installation step includes a lower gap filling step of injecting a filler into a lower gap formed between a lower surface of the lower base and an upper surface of the lower structure in the separation space; The isolator installation method according to claim 1 .

3. the lower base and the lower structure have a lower vertical communication hole that communicates in the vertical direction, The step of installing the lower base may include, before the step of filling the lower gap, a lower plug-in connecting member inserting step of inserting a lower plug-in connecting member that connects the lower base and the lower structure into the lower vertical communication hole from above the lower base; a lower base suspending step that suspends the lower base until the lower gap is formed; having The isolator installation method according to claim 2 .

4. the upper base and the upper structure have upper vertical communication holes that communicate with each other in the vertical direction, The upper base temporary installation step includes: an upper base temporary placement step of temporarily placing the upper base on the lower base; a connecting step of connecting the upper base connecting material inserted into the upper vertical communicating hole of the upper base and the upper structure connecting material inserted into the upper vertical communicating hole of the upper structure in the vertical direction; an upper base lifting and approaching step for lifting the upper base toward the underside of the upper structure; having The isolator installation method according to claim 1 .

5. The isolator installation step includes: pulling the isolator horizontally to connect a lower surface of the isolator to an upper surface of the lower base. The isolator installation method according to claim 1 .

6. The upper base installation step includes: an isolator upper surface contact step in which the upper base is lowered in the separated space to bring a lower surface of the upper base into close contact with an upper surface of the isolator; an upper gap filling step of injecting a filler into an upper gap formed between an upper surface of the upper base and a lower surface of the upper structure; having The isolator installation method according to claim 1 .

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