JP3002126B2 - Temporary receiving method for structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for temporarily receiving a structure, which is suitable for repairing a structure in which an existing pile has been damaged due to a large earthquake or the like and which has sunk.

[0002]

2. Description of the Related Art Conventionally, when an existing pile, which supported the structure, was damaged due to a large earthquake or land subsidence due to a large earthquake or land subsidence, the structure is raised to a predetermined position before the settlement. The restoration work is being carried out in various ways. As an example of these various restoration methods, for example, excavating the ground such as below a structure to expose the foundation of the structure and the vicinity of the upper part of the pile, and a new pile or the like below the structure. After the foundation is constructed, the structure is jacked up to a predetermined position using an appropriate lifting means such as a hydraulic jack, and the jacked-up structure is supported on these new piles or foundations. There is.

[0003]

In the above-mentioned restoration method, however, it is necessary to excavate the ground below the structure to expose the foundation of the structure. This causes a risk that the existing piles are further damaged due to excavation of the ground and the structure further sinks. Therefore, there is a demand for a device for performing restoration work as safely as possible.

[0004] In view of the above circumstances, the present invention has an object to provide a temporary structural receiving method capable of preventing a further damage to an existing pile during excavation or the like and performing a repair work as safely as possible. And

[0005]

That is, a first aspect of the present invention relates to an existing pile (3) cast in the ground (2), and
Substructures (5, 6) supported by the existing pile (3)
And a structure (1) comprising a structure body (7) supported on the substructure (5, 6), wherein the structure (1) in a state where the existing pile (3) is damaged is used. To repair
A support pile (1) is placed on the ground (2) below the structure body (7).
3) Casting and constructing, excavating the ground (2), and forming an excavation space (14) below the foundation structure (5, 6) so that the substructure (5, 6) is formed. While exposing
The substructure (5, 6) is temporarily supported and supported on the support pile (13) via predetermined temporary support means (15, 16), and in that state, a repair work on the structure (1) is performed. It is configured to perform.

According to a second aspect of the present invention, in the method for temporarily receiving a structure (1) according to the first aspect, the substructures (5, 6) are supported by the existing piles (3). A plurality of footings (5) and the respective footings (5)
An underground beam (6) for joining the support piles, the support pile (13)
A plurality of castings are constructed around the footing (5) at positions not interfering with the underground beam (6), and the temporary receiving support means (15, 16) A supporting horizontal member (15) installed between a plurality of supporting piles (13, 13), and a supporting horizontal member (15) installed between the supporting horizontal member (15) and the substructure (5, 6); Bridge member (1
5) A temporary support telescopic support device (16) capable of pressing the substructure (5, 6) upward in a manner to obtain a reaction force in (5).

According to a third aspect of the present invention, in the method for temporarily receiving a structure (1) according to the second aspect, the supporting transverse member (15) is provided below the underground beam (6). The temporary supporting telescopic support device (16) is installed between the supporting horizontal member (15) and the underground beam (6).

According to a fourth aspect of the present invention, in the method for temporarily receiving a structure (1) according to the second aspect, the supporting horizontal member (15) passes below the footing (5). The temporary support telescopic support device (16)
The supporting horizontal member (15) and the footing (5)
It is installed between.

According to a fifth aspect of the present invention, in the method for temporarily receiving a structure (1) according to the second aspect, the support pile (13) includes a support pile body (53) and the support pile body. A supporting steel material (12) embedded in the support pile body (53), the supporting steel material (12) being arranged so as to protrude upward from an upper end of the support pile body (53); 5
3) A structure body load support surface (13a) is formed at an upper end of the support pile (13, 13), and the support transverse member (15) is provided between the plurality of support piles (13, 13). In such a manner as to be supported by the supporting steel material (12, 12).

According to a sixth aspect of the present invention, in the method for repairing a structure (1) in which an existing pile (3) is damaged according to the second aspect, the supporting transverse member (15) is a straight steel material. Consists of

According to a seventh aspect of the present invention, in the method for repairing a structure (1) in which an existing pile (3) is damaged according to the fifth aspect, the foundation structure (5, 6) is connected to the support pile. After being temporarily supported by (13), the lower foundation structure (19) is placed in the excavation space (14) while maintaining the state.
Is constructed so as to be supported by the support pile (13) via the structure body load supporting surface (13a), and then the substructure (5, 6) and the lower substructure (19) are constructed. Are connected so that the load from the substructure (5, 6) side can be transmitted to the lower substructure (19).

It should be noted that the numbers in parentheses and the like are for convenience showing the corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0013]

According to the first aspect of the present invention, the substructure (5, 6) side is temporarily supported and supported on the support pile (13) via predetermined temporary support means (15, 16). Is done.

Further, in the second aspect of the present invention, it is possible to avoid the work of placing and constructing the support pile (13) directly below the footing (5) or directly below the underground beam (6). In addition, the position of the support point (16a) for supporting the substructure (5, 6) by the temporary support telescopic support device (16) is adjusted corresponding to the position of the substructure (5, 6). You.

In the third aspect of the present invention, the supporting horizontal member (15) does not need to be disposed below the footing (5).

According to a fourth aspect of the present invention, the footing (5) is directly supported via a telescopic support device (16) for temporary receiving.

According to a fifth aspect of the present invention, the support pile (13) is provided with a support transverse member (15) erected thereon and above the support pile main body (53) of the support pile (13). In the above, various operations are performed in such a manner that the load can be supported on the support pile (13) via the structural body load support surface (13a) of the support pile body (53).

Further, in the sixth aspect of the present invention, the degree of bending of the supporting transverse member (15) depends on the magnitude of the load applied to the supporting transverse member (15) from the substructure (5, 6). Will be shown.

According to a seventh aspect of the present invention, the structure main body (7) side receives a load from the structure main body (7) side.
It is connected to the support pile (13) side so as to be transmitted to the support pile (13) via the lower substructure (19).

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view showing a building before restoration, FIG.
Shows a state in which the building shown in FIG. 1 is undergoing restoration work by the temporary receiving method according to the present invention,
FIG. 3 is a side view showing the vicinity of the foundation of the building, FIG. 3 is a diagram showing a state where the repair work is further advanced near the foundation of the building shown in FIG. 2, and FIG. 4 is a view of the building shown in FIG. Figure 5 shows a state where restoration work has progressed further around the foundation.
Is a cross-sectional view taken along the line X1-Y1 in FIG. 4, FIG. 6 is a view showing a state in which the repair work is further advanced near the foundation of the building shown in FIG. 4, and FIG. 7 is a line X2-Y2 in FIG. It is sectional drawing.

As shown in FIG. 1, a building 1 which is a large reinforced concrete building such as a factory has a plurality of existing stakes 3 made of reinforced concrete poured into a ground. The piles 3 support a plurality of foundations 5 which are independent footings made of reinforced concrete. In addition,
One foundation 5 is supported by a plurality of piles 3, and underground beams 6 made of reinforced concrete extending in a substantially horizontal direction are provided between the foundations 5, 5. The foundation 5 and the underground beam 6 are buried in the ground 2. Further, on these foundations 5, a building body 7 having a plurality of columns, beams, slabs, and walls made of reinforced concrete is erected. The slab 9 on the floor on the first floor of the building body 7 is supported by the plurality of underground beams 6.

By the way, due to the occurrence of a large earthquake or the like, the plurality of piles 3 of the building 1 described above, as shown by the solid line in FIG.
The pile 3 is broken and damaged in the vicinity of the joint between the pile 3 and the foundation 5). Therefore, the plurality of foundations 5 supported by the plurality of piles 3 and the building main body 7 supported by the plurality of piles 3 via the foundations 5 have a predetermined position ST1 before the pile 3 is damaged (see FIG. 1). From the two-dot chain line (shown by a two-dot chain line), it is settled unevenly and is inclined as shown by the solid line in FIG.

Since the building 1 in which the pile 3 has been damaged and settled is constructed as described above, the building 1 is repaired by the following procedure. As a first procedure, ground improvement work is performed. First, a chemical solution is injected into the ground 2 below the building body 7 in such a manner that a predetermined boring machine (not shown) penetrates the slab 9 from above the slab 9 on the floor on the first floor of the building body 7. A hole (not shown) is formed, and a predetermined ground solidifying material is injected into the ground 2 through the hole. By injecting the ground hardening material, the ground 2 (for example, to a depth of 15 to 17 m from the ground surface) below the building body 7 is improved and strengthened. Thereby, the stability of the ground 2 below the building body 7 was improved. At the same time, along with this work, a gap (not shown) between the foundation 5 and the ground 2 in the lower part of the foundation 5 and the slab 9 and the ground 2 in the lower part of the slab 9 on the floor on the first floor. It is preferable to fill a gap (not shown) with a predetermined filler (not shown) (for example, a mixture of bentonite liquid and cement). Thereby, the stability between the foundation 5 and the ground 2 or between the slab 9 on the floor on the first floor and the ground 2 is also improved, which is convenient in the subsequent work.

Next, as a second procedure, a support pile construction work is performed. That is, an appropriate excavator (not shown), for example, a well-known BH machine capable of constructing a cast-in-place concrete pile by performing ground excavation using muddy water, particularly, installing the machine main body in a floor space of the first floor where the floor height is limited. Known TB that can be installed
FIG. 2 (in FIG. 2, for the sake of convenience in simply explaining the idea of the present invention), the inclination of the foundation 5 and the building body 7 due to settlement and the damage of the pile 3 are omitted. 3 to FIG. 15), as shown in FIG. 3 to FIG. 15, the slab 9 is penetrated from above the slab 9 on the floor side of the first floor of the building body 7. A plurality of holes 10 for supporting piles are formed in the ground 2 below the main body 7. In addition,
As shown in FIG. 5, a plurality of (four in FIG. 5) support pile holes 10 are formed around each foundation 5 so as not to interfere with the underground beam 6. Further, as described above, the stability of the ground 2 below the building body 7 is improved, and
Between the slab 9 on the floor side of the first floor and the ground 2
And the stability between the support pile holes 10
Can be stably performed. Next, as shown in FIG. 3, a reinforcing bar cage 11 is inserted and installed in each of the drilled support pile holes 10. Each rebar cage 11 is configured in such a manner that a plurality of rebar cage pieces 11a shorter than the height of the floor space on the first floor are connected.
1a is sequentially connected in the floor space of the first floor, and the connected reinforcing bar pieces 11a are inserted into the holes 10 for the support piles. Next, as shown in FIG. 3, a vertical steel pipe 12 is inserted and installed in the upper side of each support pile hole 10, and concrete 30 is poured into the support pile hole 10 and filled (the steel pipe 12 is not filled). Alternatively, an H-shaped steel or the like may be employed.) That is, the steel cage 12 and the steel pipe 12 in each support pile hole 10 are buried by the concrete 30. By consolidation of the cast and filled concrete 30, the plurality of reinforced concrete support pile main bodies 53 are connected to the respective support pile holes 1.
It was cast and constructed in the form of being set at 0. The support pile 13 is constituted by the respective support pile bodies 53 and the steel pipes 12 embedded in the support pile bodies 53. That is, a plurality of support piles 13
Was built. Each steel pipe 12 is arranged so as to protrude upward from the upper end of the support pile main body 53, and an upper end face 13a is formed at the upper end of the support pile main body 53 in a form capable of supporting a load from above. Have been. Note that, as described above, as shown in FIG.
The support piles 13 installed in the holes 10 for the support piles do not interfere with the underground beams 6 around the foundations 5 because the support piles 13 are formed so as not to interfere with the underground beams 6. It is built and cast in the form. Further, as another embodiment, the support pile main body such as the support pile main body 53 may be constructed of steel pipe concrete or the like.

Next, a temporary receiving operation is performed as a third procedure. That is, under the slab 9 on the floor side of the first floor, the underside of each foundation 5 and the ground 2 around the foundation 5 are excavated as shown in FIG. 4 and connected to the foundation 5 and the foundation 5. Part of the underground beam 6 and the upper part 3a of the plurality of piles 3 under the foundation 5
(For example, 1.5 m below the bottom end of the foundation 5).
To a depth of. ). At the same time as the excavation, the steel pipe 12 of the support pile 13 is cut to make the levels uniform. The upper end 12a of the steel pipe 12 after cutting is arranged slightly above the upper surface of the ground 2 formed by excavation. Further, by this excavation, a construction space 14 for performing each subsequent operation is formed below the foundation 5. In addition, while exposing the upper part 3a of each pile 3, as shown in FIG. 4, the reinforcing iron plate 17 is wound around these upper parts 3a to reinforce the damaged part of the upper part 3a (in addition to the damaged part of the upper part 3a). A filler such as a non-shrink mortar may be filled.) That is, the ground 2 under and around each foundation 5 is excavated in such a manner that the upper part 3a of the pile 3 supporting the foundation 5 is exposed, so that the supporting power of the foundation 5 by the ground 2 is obtained by the excavation. Although the load from the foundation 5 applied to the damaged and exposed pile 3 increases by the loss, the damaged portion of the upper part 3a of each pile 3 is reinforced as described above, and the strength of each damaged pile 3 is improved. Therefore, even if the load on these piles 3 increases,
The risk of further collapse and the foundation 5 sinking further is prevented. By the way, in this embodiment, as shown in FIG. 5, four support piles 13 are constructed for each foundation 5, and two of the four support piles 13 are provided.
The other two support piles 13 are in pairs. That is, the pair of support piles 13, 13
The pair of support piles 13 are arranged at positions substantially symmetrical with respect to one underground beam 6 joined to the foundation 5, and another pair of support piles 13, 13 sandwiches another underground beam 6 joined to the foundation 5. And are arranged at substantially symmetrical positions. Therefore, a pair of support piles 13, 13
Between each pair of support piles 13 and another pair of support piles 13, 13.
3 is supported on the upper end 12a of the steel pipe 12 and has a horizontal H
Each of the support members 15 made of a mold steel or the like is erected. As described above, each pair of support piles 13, 13
The support members 15, which are provided between the pair of support piles 13, are located below the underground beams 6 because the underground beams 6 are arranged at substantially symmetrical positions with one underground beam 6 joined therebetween. At the same time, the underground beam 6 is three-dimensionally crossed. Next, a temporary receiving jack 16 composed of a hydraulic jack or the like is placed between each of the three-dimensionally intersecting support members 15 and the underground beam 6, and the underground beam 6 is moved upward in such a manner that a reaction force is applied to the support member 15. ,
That is, they are installed so that they can be pressed in the direction away from the support member 15. After the installation, each temporary receiving jack 16 is driven, and between the support members 15 and the underground beam 6 that are three-dimensionally intersected, a reaction force is applied to the support members 15 so that the support members 15 are positioned above the support members 15. The underground beam 6 is given a force to press the underground beam 6 upward. That is, the supporting beams 6 are provided with the supporting force by the plurality of supporting piles 13 having the steel pipes 12 via the temporary receiving jacks 16 and the supporting members 15, and therefore, the foundation 5 joined to the underground beams 6 is provided. Are these underground beams 6
A plurality of supporting piles 13 provide a supporting force via the temporary receiving jack 16 and the supporting member 15. That is,
The foundation 5 is not only supported by the existing pile 3,
It is also supported by a plurality of support piles 13. In other words, the foundation 5 is temporarily supported by the plurality of support piles 13 via the temporary receiving jack 16 and the support member 15. In the temporary receiving operation described above, the support member 1
5 was erected under the underground beam 6 to temporarily support the underground beam 6 so as to support the underground beam 6. As another embodiment of the present invention, for example, a two-dot chain line in FIG. As shown in the figure, the temporary receiving support may be performed by supporting the base 5 by supporting the base 15 under the base 5. In addition, in the above-mentioned provisional work, each basic 5
Is excavated below and in the surrounding ground 2 in such a manner that the upper part 3a of the pile 3 supporting the foundation 5 is exposed. Therefore, the load from the foundation 5 on the damaged and exposed pile 3 increases due to the loss of the support force of the foundation 5 by the ground 2. When the load applied to the pile 3 increases, the pile 3 further collapses, and the foundation 5 may further sink. Therefore, in order to minimize the increase in the load applied to the pile 3, the temporary receiving operation is sequentially performed on one or a small number of foundations 5 of the entire building 1. By doing so, the load from the foundation 5 during the temporary receiving operation is
Via a plurality of underground beams 6 joined to the foundation 5, the foundation 5 before starting the temporary receiving operation or after the temporary receiving operation is completed (that is, the load is applied by the ground 2, the pile 3, the support pile 13, etc.) Tents that can be sufficiently supported) and concentrated on the pile 3 that supports the foundation 5 during the temporary receiving operation as much as possible. That is, since the increase in the load applied to the pile 3 can be minimized, the danger that the pile 3 is further collapsed and the foundation 5 further sinks can be prevented.

Next, as a fourth procedure, a lower foundation construction work is performed. In addition, the basic 5 in the state where the said temporary receiving work was completed
As for, the state of temporary support is maintained.
That is, as shown in FIG. 6, the ground 5 under and around the foundation 5 in the state where the temporary receiving operation has been completed is completed.
(For example, as shown by a two-dot chain line in FIG. 6)
Dig about 1 m below the top surface of the ground 2 during the temporary receiving work. ). That is, the construction space 14 below the foundation 5 is expanded downward. Then, a not-shown formwork, reinforcing bars and the like are installed on the excavated ground 2, that is, in the construction space 14, and concrete is poured in such a manner that a part of the upper part 3 a of the pile 3 below the foundation 5 is embedded. As shown in FIGS. 6 and 7, a rectangular parallelepiped lower foundation 1 having a horizontal section corresponding to the foundation 5 is provided.
Build 9. Therefore, a plurality of piles 3 corresponding to each foundation 5
And the steel pipe 12 projecting upward from the upper end surface 13a of the support pile 13 is in a state of vertically penetrating the lower foundation 19 corresponding to the foundation 5. In addition, the height level of the upper end of the lower foundation 19 is substantially equal to the height level of the upper surface of the ground 2 (shown by a two-dot chain line in FIG. 6) at the time of the temporary receiving work, and is thus supported by the plurality of support piles 13. The supporting members 15 and the like are exposed above the lower foundation 19. Further, the lower foundation 19 and the plurality of support piles 13 are connected to the upper end surface 13 of the support pile main body 53 of each support pile 13.
a is integrally joined in such a manner that a contacts the bottom of the lower foundation 19. That is, the load from the lower foundation 19 is supported by the support pile main bodies 53 of the plurality of support piles 13 via the respective upper end surfaces 13a. In addition, when setting the formwork or reinforcing bars of the lower foundation 19, the lower foundation 19
A friction reducing material 20 such as a sponge member is wound around the upper part 3a of the plurality of piles 3 corresponding to the above. That is, after the construction of the lower foundation 19 is completed, the lower foundation 19 and the lower foundation 1
9 is in contact with the upper part 3a of the plurality of piles 3 embedded in the pile 9 through the friction reducing material 20, so that the plurality of piles 3 can move vertically with respect to the lower foundation 19. State.

Thereafter, some supporting material (for example, sandals or jacks) is installed between the lower foundation 19 and the foundation 5, so that the load from the foundation 5 is supported by the lower foundation 19 via the supporting material. Then, the support member 15 and the temporary receiving jack 16, which are temporary receiving supporting means, are removed. After removing the temporary receiving support means, for example, the base 5 is jacked up by seeking a reaction force on the lower foundation 19, and a load from the lower foundation 19 is applied to the lower foundation 19 between the lower foundation 19 and the foundation 5. The restoration of the building 1 is completed by connecting in such a manner that it can be transmitted (for example, by constructing a reinforced concrete structure connecting these both).

In the above-described embodiment, the structure 1 such as a factory is taken as an example of a structure to which the temporary receiving method according to the present invention is applied. Besides buildings such as factories and buildings,
A structure such as a pier may be used.

[0029]

As described above, the first aspect of the present invention relates to an existing pile, such as a pile 3, cast in the ground such as the ground 2, a foundation 5, and a ground supported by the existing pile. A structure such as a building 1 including a foundation structure such as a center beam 6 and a structure body such as a building body 7 supported on the foundation structure, wherein the existing pile is damaged. In order to repair the object, a support pile such as a support pile 13 is cast and constructed on the ground below the structure body, the ground is excavated, and an excavation space such as a construction space 14 is formed below the foundation structure. In the form of forming, while exposing the substructure, the substructure is temporarily supported and supported on the support pile via predetermined temporary receiving support means such as a support member 15, a temporary receiving jack 16, and the like, In this state, the structure is constructed so as to perform a repair work on the structure. That is, for example, even when the existing pile is significantly damaged, the ground is excavated to expose the foundation structure, and the foundation structure is temporarily supported and supported on the supporting pile via predetermined temporary supporting means. The danger that the existing pile is further damaged and the structure body side sinks can be prevented as much as possible. In other words, further damage to the existing piles can be prevented, and the repair work can be performed as safely as possible.

According to a second aspect of the present invention, in the temporary receiving method of a structure according to the first aspect, the substructure includes a plurality of footings such as a plurality of footings 5 supported by the existing pile. Underground beam 6 connecting each footing
Etc., the support pile is constructed by placing a plurality of support piles around the footing at a position not interfering with the underground beams, and the temporary receiving support means is provided in the excavation space, the plurality of A support transverse member such as a support member 15 erected between support piles, and installed between the support transverse member and the substructure;
The temporary support telescopic support device such as a temporary support jack 16 capable of pressing the substructure upwardly in a form that requires a reaction force on the support horizontal member. That is, since the support pile is cast and constructed around the footing so as not to interfere with the underground beam, it is possible to avoid performing the construction work of the support pile directly under the footing or under the underground beam. Therefore, in addition to the effect of the first invention, the repair work can be performed safely. In addition, the support of the foundation structure by the plurality of support piles includes a support transverse member erected between the plurality of support piles, and a temporary support telescopic member installed between the support transverse member and the foundation structure. Since it is performed via the support device, the number of the support points 16a of the temporary receiving telescopic support device for supporting the substructure is minimized as compared with the number of the support piles. Therefore, a plurality of support points 16 to support the substructure
Among the points a, it is possible to prevent as much as possible the generation of the support points 16a that hardly receive the load from the substructure. That is, by applying the load from the foundation structure to each support pile as evenly as possible, it is possible to prevent the risk of damage to the support pile due to concentration of the load on the specific support pile. Furthermore, by employing the telescopic support device for temporary receiving, the vertical position of the support point 16a for supporting the substructure can be adjusted in accordance with the position of the substructure. Therefore, the vertical position of each support point 16a can be adjusted so that each of the plurality of support points 16a to support the substructure receives the load from the substructure, respectively. It is possible to minimize the occurrence of the support point 16a that receives almost no load. That is, by applying the load from the foundation structure to each support pile as evenly as possible, it is possible to prevent the risk of damage to the support pile due to concentration of the load on the specific support pile.

According to a third aspect of the present invention, in the method for temporarily receiving a structure according to the second invention, the supporting transverse member is erected so as to pass below the underground beam, and The telescopic support device is installed between the support horizontal member and the underground beam. In other words, there is an existing pile supporting the footing below the footing, but since the supporting horizontal member does not need to be disposed below the footing, the stake of the supporting horizontal member or the like is not required. At this time, the work such as erection and the like does not become difficult due to the interference between the supporting horizontal member and the existing pile, so that the work becomes easy and convenient in addition to the effect of the second invention. Furthermore, when performing the work of releasing the support state between the existing pile and the foundation structure, for example, when cutting between the existing pile and the footing, a support horizontal member is provided below the footing. Since it does not exist, it does not hinder the work and is convenient.

According to a fourth aspect of the present invention, in the method for temporarily receiving a structure according to the second invention, the supporting horizontal member is installed so as to pass below the footing, and the temporary expanding and contracting for temporary receiving is performed. Since the supporting device is installed between the supporting horizontal member and the footing, the footing originally intended to transmit the load on the structure body side downward is provided via the temporary supporting telescopic supporting device or the like. Directly supported. That is,
To avoid supporting the structure body side by supporting a part provided with a purpose different from the purpose of transmitting the load on the structure body side downward, such as an underground beam, to avoid, for example, This prevents an excessive bending stress from being applied to an underground beam or the like. Therefore, in addition to the effect of the second invention, the work can be performed in a form in which the structure is prevented from being damaged as much as possible without giving unreasonable stress to the structure.

According to a fifth aspect of the present invention, in the method for temporarily receiving a structure according to the second aspect, the supporting pile is
It has a supporting pile main body such as the supporting pile main body 53 and a supporting steel material such as a steel pipe 12 buried in the supporting pile main body, and the supporting steel material is disposed so as to protrude upward from an upper end of the supporting pile main body. A structure body load supporting surface such as an upper end surface 13a is formed at an upper end of the supporting pile main body, and the supporting horizontal member is supported between the plurality of supporting piles by the supporting steel material of the supporting piles. In this case, in addition to the effect of the second invention, the support pile is maintained in a state in which the substructure is temporarily supported and supported, that is, in a state where the support horizontal member is erected on the support pile. Above the support pile main body, various operations, for example, above the support pile main body, in a form capable of supporting the load on the support pile via the structure main body load supporting surface of the support pile main body. The lower part is formed so that the load can be supported on the supporting pile via the load supporting surface. It is convenient because it is possible to perform such task of building the lower substructure such as foundation 19. Furthermore, it is convenient because the installed supporting horizontal member can prevent the supporting pile main body from directly pressing the supporting pile main body and crushing or breaking the supporting pile main body.

According to a sixth aspect of the present invention, in the method for temporarily receiving a structure according to the second invention, the supporting horizontal member is made of a straight steel material. Due to the load applied from the substructure, the supporting transverse member bends. Therefore, a danger such as an inadvertent increase in the load on the supporting transverse member can be detected at an early stage by visually checking the degree of bending of the supporting transverse member. That is, in addition to the effect of the second aspect, it is possible to quickly detect an emergency such as a fall of a substructure and take measures such as prompt evacuation of workers or additional installation of a supporter. High safety.

According to a seventh aspect of the present invention, in the method for temporarily receiving a structure according to the fifth invention, after temporarily supporting the substructure on the support pile, the state is maintained. A lower foundation structure such as a lower foundation 19 is constructed in the excavation space in such a manner as to be supported by the support pile via the structure body load supporting surface, and thereafter, the lower foundation structure is connected to the lower foundation structure. Between the lower substructures so that the load from the substructure can be transmitted to the lower substructure. Is connected to the lower substructure side, and thus to the support pile side, so as to be transmitted to the support pile via the lower substructure. In other words, in addition to the effect of the fifth aspect, the underground side of the structure is reconstructed as firmly as possible, so that the restoration can be performed satisfactorily.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing a building before restoration.

FIG. 2 is a side view showing a state of performing a repair work on the building shown in FIG. 1 by the temporary receiving method according to the present invention, and showing a vicinity of a foundation of the building; is there.

FIG. 3 is a diagram showing a state in which restoration work has further progressed in the vicinity of the foundation of the building shown in FIG. 2;

FIG. 4 is a diagram showing a state in which restoration work has further progressed near the foundation of the building shown in FIG. 3;

FIG. 5 is a sectional view taken along line X1-Y1 of FIG. 4;

FIG. 6 is a diagram showing a state in which restoration work has further progressed near the foundation of the building shown in FIG. 4;

FIG. 7 is a sectional view taken along line X2-Y2 in FIG. 6;

[Explanation of symbols]

1 ... Structure (building) 2 ... Ground 3 ... Existing pile (pile) 5 ... Foundation structure, footing (foundation) 6 ... Foundation structure, underground beam (underground beam) 7 ... Structural body (building body) 12 Steel material for supporting (steel pipe) 13 Support pile 13 a Load supporting surface of structural body (upper surface) 14 Excavation space (construction space) 15 Temporary support Means, supporting horizontal member (supporting member) 16 Temporary receiving support means, temporary supporting telescopic support device (temporary receiving jack) 19 Lower base structure (lower base) 53 Support pile body

Continuation of the front page (72) Inventor Noriyoshi Nishimura 3-1-1, Iwamotocho, Chiyoda-ku, Tokyo Examiner, Mitsui Construction Co., Ltd. You Ito (56) References JP-A-51-67614 (JP, A) JP-A-7-324341 (JP, A) JP-A-8-232284 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 37/00 E02D 35/00

Claims (7)

(57) [Claims] 1. A structure comprising an existing pile driven into the ground, a foundation structure supported by the existing pile, and a structure main body supported on the foundation structure. In order to repair the structure in which the pile is damaged, a support pile is laid and constructed on the ground below the structure body, and the ground is excavated to form an excavation space below the foundation structure. In the form, while exposing the substructure, the substructure is temporarily supported and supported on the support pile via predetermined temporary support means, and a repair work on the structure is performed in that state. A temporary receiving method for a structure. 2. The substructure has a plurality of footings supported by the existing piles and an underground beam joining the footings, and the support pile includes the underground beams around the footing. A plurality of temporary receiving and supporting means are provided between the plurality of supporting piles in the excavation space, and the supporting horizontal member and the foundation structure 2. The structure according to claim 1, further comprising a telescopic support device for temporary receiving, which is installed between the support structure members and can press the substructure upward in a manner to obtain a reaction force on the support transverse member. Temporary acceptance method. 3. The support horizontal member is installed so as to pass below the underground beam, and the temporary support telescopic support device is installed between the support horizontal member and the underground beam. 3. The temporary receiving method for a structure according to claim 2, wherein: 4. The supporting horizontal member is provided so as to pass below the footing, and the temporary supporting telescopic supporting device includes:
The temporary receiving method for a structure according to claim 2, wherein the temporary receiving method is provided between the supporting horizontal member and the footing. 5. The support pile includes a support pile main body and a support steel material embedded in the support pile main body, wherein the support steel material is disposed so as to protrude upward from an upper end of the support pile main body. A structure body load supporting surface is formed at an upper end of the support pile main body, and the support transverse member is erected between the plurality of support piles in such a manner as to be supported by the supporting steel material of the support piles. 3. The temporary receiving method for a structure according to claim 2, wherein the method is performed. 6. The method according to claim 2, wherein the supporting transverse member is made of a straight steel material. 7. After temporarily supporting the foundation structure on the support pile, the lower foundation structure is supported in the excavation space via the structure body load supporting surface while maintaining the state. The structure is constructed so as to be supported by a pile, and thereafter, the foundation structure and the lower foundation structure are connected in such a manner that the load from the foundation structure side can be transmitted to the lower foundation structure. The temporary receiving method for a structure according to claim 5, wherein: