JP3029797B2 - Building horizontal restoration method and steel pipe pile joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal restoration method for a house or a middle-to-low-rise building, in which the foundation is horizontally restored when the foundation is unequally settled due to land subsidence, etc. , Unit pile, and reaction force removal jig.

[0002]

2. Description of the Related Art Conventionally, in a building such as a house, when the foundation is unevenly settled due to the subsidence and liquefaction of the ground due to an earthquake, or the soil of the ground, etc., as a method of repairing the building horizontally,
The base jack-up method and the underpeening method are generally adopted. The foundation jack-up method is
Although relatively simple work is required, it can be adopted only when the degree of settlement is low, and the ground must be stable. Therefore, when the degree of settlement is large or the ground is unstable, the underpeening method is adopted. As shown in FIG.
A hole 51 reaching the lower surface of the base 50 is excavated from the vicinity of the foundation 50 in the ground 52, a hydraulic jack 53 is arranged on the lower surface of the foundation 50, and the steel pipe pile 54 is pressed into the base 50 as a reaction force.

[0003]

However, since the piles 54 are arranged directly below the foundation 50, it is necessary to connect a number of short unit piles until the required length is reached, and the working efficiency is poor. In addition, a welded joint is used as a joint between the unit piles. However, in order to secure a working space, a large hole 51 must be dug below the foundation 50, and a sufficient welding posture must be taken. Is difficult, and there is still a problem with the stability of welding quality. Since it is necessary to excavate the large hole 51 as described above, it takes time and effort to excavate, and heavy machinery is required. In addition, it takes time and effort to carry in and out the soil on a small land. Further, since it is necessary for the worker 55 to enter the hole 51 largely dug to the bottom of the base 50 to perform the work, there is a problem in safety. In the case where the soil is likely to collapse, earth retaining and the like are required, which further increases the work. In addition,
To stabilize the quality of the joint part of the unit pile, a threaded joint may be considered.However, if a thread groove is cut into a unit pile made of steel pipe, the thickness of that part will be reduced and the strength will decrease.
It is necessary to make the whole pile thick, which increases the cost.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a method for rehabilitating a horizontal building, which requires a small amount of excavation, can lengthen unit piles, is efficient, and can perform work safely. The purpose is to: Another object of the present invention is to provide a horizontal restoration method for a building, a steel pipe pile joint, and a unit pile capable of stabilizing the quality of the joint portion of the unit pile. Still another object of the present invention is to provide a reaction force removing jig which can be effectively used in the method of the present invention.

[0005]

In the horizontal restoration method of a building according to the present invention, a reaction force removing jig is attached to a side surface of a rising portion of a foundation of a building, and a jack supported by the reaction force removing device is used to fix the foundation. This is a method of pressing a pile into the nearby ground. The pile may be formed by connecting a plurality of unit piles. In this case, after the lower unit pile is pressed into the ground to some extent, the upper unit pile is connected to the lower unit pile, and the connected pile is pressed again with the jack. According to this method, the pile is driven into the vicinity instead of directly below the foundation, so that the foundation does not hinder the driving. Therefore, the length of the unit pile can be lengthened, and the work can be efficiently performed when the pile of the required length is driven. It is also possible to use one continuous pile without dividing it into unit piles. In addition, it is not necessary to excavate the ground greatly because a reaction force removing jig is attached to the side surface of the rising portion of the foundation to obtain the reaction force of press-fitting the pile. For this reason, excavation does not require much work, and there is little need to carry in and out soil, which is a problem in narrow land. In addition, it does not require earth retaining, making it possible to work safely. For these reasons, no heavy equipment is required, and even when arranging the piles inside the building, the area for removing the floor of the building for excavation work or the like can be small, and work can be performed under the floor. . In this method, when the foundation has a base portion that is wider than the rising portion, a “hanging portion” may be provided on a part of the base portion, and a pile that is pressed into the ground may be disposed on the hanging portion. By providing the hanging portion in this manner, the pile can be arranged close to the foundation core, and the eccentric load acting on the pile is reduced, and a solid structure can be obtained. The unit pile is, for example, a steel pipe pile and has a threaded portion at the end for joining between the unit piles. Thus, the quality of the joint is stabilized as compared with the welded joint by using the mechanical joint by the threaded portion. Also, when unit piles are joined by welding joints, work is performed beside the foundation, so that a work space is easily obtained, a sufficient welding posture is obtained, and the quality of the joints is stabilized.

[0006] The use of the press-fitted piles for horizontal restoration of a building can be roughly divided into, for example, the following two methods.
A first method is a method in which after the press-fitting of the pile is completed, a foundation receiving member for transmitting the supporting force of the pile to the foundation is attached to the pile, and concrete is connected to the top end face of the foundation. The foundation receiving member may be a bracket that is welded to the pile to receive the lower surface of the foundation, or may be a member that is attached to a rising portion of the foundation. In this way, when raising the foundation by joining concrete to the top end face, it is not necessary to lift the foundation, so the jack only needs to have the pressing force necessary for press-fitting the pile, and the number of piles and the driving depth Also, it is enough to reinforce the foundation, and simple construction is enough. Therefore, a building in which uneven settlement of the foundation has occurred can be very easily rehabilitated horizontally by reinforcing the foundation with piles. The second method is a method in which a reaction force is obtained by a press-fitted pile, and the foundation of the building is jacked up during the press-fitting process, or after the press-fitting, or during both the press-fitting process and the press-fitting process. In this case, it is necessary to jack up several places of the foundation at the same time. Since the pile is displaced from the foundation core, an eccentric load acts on the pile and it is difficult to lift with a jack,
Depending on the condition of the sunk foundation, the condition of the ground, etc.
Horizontal restoration of a building is possible by jacking up such a foundation.

[0007] The steel pipe pile joint of the present invention comprises a female screw side joint member and a male screw side joint member. The female screw side joint member is
It comprises a screw tube made of steel pipe with an internal thread formed on the inner diameter surface, and a short tube-shaped backing metal partly fitted and fixed in the screw tube and protruding from the base end of the screw tube. The external thread side joint member is a steel pipe screw cylinder having an external thread formed on the outer diameter surface,
A short cylindrical backing metal partly fitted into and fixed to the screw cylinder and protruding from the base end of the screw cylinder. Each of the female screw side joint member and the male screw side joint member fits the backing metal into an end of a steel pipe unit pile main body and welds the screw cylinder to the unit pile main body. Further, the unit pile according to the present invention has a female thread side joint member and a male thread side joint member provided at both ends of a steel pipe unit pile main body, and has the following configuration. The female screw-side joint member includes a screw pipe made of a steel pipe having an internal thread formed on an inner diameter surface thereof, and a short cylindrical back which is partially fitted and fixed to the screw pipe and protrudes from a base end of the screw pipe. It consists of a deposit. The male screw-side joint member is a steel pipe screw cylinder having an external thread formed on an outer diameter surface, and a short cylindrical shape partly fitted and fixed to the screw cylinder and protruding from a base end of the screw cylinder. It consists of backing money. The screw cylinders of the female screw side joint member and the male screw side joint member have a pipe wall thicker than the unit pile main body. In each of the female screw side joint member and the male screw side joint member, the backing metal is inserted into the end of the unit pile main body to weld between the screw cylinder and the unit pile main body. In the case of a steel pipe pile joint or unit pile of this configuration, since the female thread side joint member and the male screw side joint member which are separate from the unit pile body made of steel pipe are used, the pipe wall of the unit pile body is thickened to form a thread groove. It is not necessary to perform the operation, and it is sufficient that the pile has the necessary thickness, and the unit pile can be made inexpensive. Further, it is also possible to use a solid material such as a structural steel pipe for each joint member, and a solid joint is obtained. Since each joint member is a short member, it is easy to handle and can easily form a thread groove, weld a backing metal, and the like. In this way, by preparing the female screw side joint member and the male screw side joint member provided with the thread grooves in advance as a pair of components, a unit pile having a screw type joint can be easily manufactured.

[0008] The reaction force removing jig of the present invention includes a foundation member attached to a side surface of a rising portion of a foundation, and a jack member having a receiving portion of a jack for press-fitting a pile at an upper portion. A connecting mechanism is provided for mounting the jack-side member up and down so that the mounting position can be changed with respect to the member. According to this jig, when the pile is pressed in by the horizontal restoration method of the present invention, after the jack is pressed into the pile to some extent,
The mounting position of the jack member on the reaction force removing jig can be changed downward, and press-fitting by the jack can be performed again.
Thus, by making the position of the jack-side member of the reaction force removing jig variable, a long unit pile can be press-fitted even if the stroke of the jack is short.

[0009]

An embodiment of the present invention will be described with reference to the drawings. This horizontal restoration method of building is based on the foundation 2 of building 1.
The reaction force removal jig 3 is attached to the side of the rising portion 2a of
In this method, the pile 6 is pressed into the ground 5 near the foundation 2 by the jack 4 supported by the reaction force removing jig 3. An outer wall 7 is installed on a top end surface of the foundation 2 via a base (not shown). In this embodiment, building 1 is a house,
The foundation 2 is a cloth foundation around the building, a part of which is shown in a plan view in FIG. At a plurality of locations on the settling side of the cloth foundation 2,
The reaction force removal jig 3 is attached, and the pile 6 is hit. In addition, in the independent foundation 2A and the internal cloth foundation 2B which are the internal foundations in FIG.
The present invention can be applied similarly to the outer fabric base 2. Also,
The reaction force removing jig 3 is, in this example, the building 1 with respect to the foundation 2.
However, it may be mounted on the outer surface of the building as in the example of FIG.

As shown in FIG. 1, the reaction force removing jig 3 includes a base member 8 and a jack member 9 each made of steel. The foundation side member 8 includes an anchor 11 embedded in the foundation 2a.
Thereby, it is attached to the side surface of the foundation 2 at a plurality of upper and lower locations.
The anchor 11 may be a chemical type such as a hardening agent, a through bolt, or a driving type, and is inserted into the mounting hole 21 of the plate-shaped portion of the base member 8. The side surface of the jack-side member 9 is formed in an inverted L-shape, and an upper piece thereof serves as a receiving portion 9 a of the jack 4. The jack 4 is composed of a hydraulic jack, and is attached downward to the lower surface of the receiving portion 9a with bolts and nuts. The base-side member 8 and the jack-side member 9 can be attached to each other by vertically changing their positions by a coupling mechanism 10.

The coupling mechanism 10 includes a pair of left and right guide portions 8a provided on the base member 8 for supporting the jack member 9 so as to be slidable up and down. Replaceable bolt insertion hole 1
And 3. The bolts 12 penetrate the jack-side member 9 and are arranged at a plurality of upper and lower locations.
The coupling mechanism 10 is not limited to the one shown in the drawing, but can change the mounting position of the jack-side member 9 with respect to the base-side member 8 up and down, and firmly fixes the two 8, 9 at each changed position. Anything that can be in a state is acceptable.

The pile 6 is made of a steel pipe pile, and a plurality of unit piles 6 a are connected by a steel pipe pile joint 14. As shown in FIG. 5, the steel pipe pile joint 14 includes a female screw side joint member 15 and a male screw side joint member 16. The female screw side joint member 15 is a steel pipe screw cylinder 15a having an internal thread formed on the inner diameter surface, and a short cylindrical backing part partially fitted into the screw cylinder 15a and protruding from the base end of the screw cylinder 15a. Money 15
b. The male screw side joint member 16 includes a steel pipe screw cylinder 16 a having an external thread formed on an outer diameter surface, and a screw cylinder 1.
6a, a short cylindrical backing metal 16b partially fitted inside and protruding from the base end of the screw cylinder 16a. Each screw cylinder 15a,
Structural steel pipe (STK) is used for 16a, and each backing metal 15b, 16b is screwed to each screw cylinder 15a, 16a at a plurality of locations (for example, four locations) in the circumferential direction by local fillet welding 17.
Welded to. Each screw groove is, for example, a rectangular screw. Further, the end face 18 on the base end side of each of the screw cylinders 15a and 16a.
Is 45 ° whose inner diameter is narrower to form a groove for welding
It has a tapered surface with a slight gradient.

The female screw side joint member 15 and the male screw side joint member 16 are each fitted with a backing metal 15b, 16b at the end of a unit pile main body 6aa made of a steel pipe.
A groove formed between the end faces of the a and 16a and the unit pile main body 6aa is joined by welding 19 such as butt welding. This welding 19 is carried out before the pile driving operation.
aa is performed in a factory or the like in advance. As shown in FIG.
The unit pile 6a is formed by welding the female screw side joint member 15 to one end of the unit pile main body 6aa and the male screw side joint member 16 to the other end. The unit pile body 6aa is a screw cylinder 15
Although it is preferable that the pipe diameter is the same as the pipe diameters a and 16a (the outer diameter is the same), even if the wall thickness t1 of the pipe wall of the unit pile main body 6aa is thinner than the screw cylinders 15a and 16a as shown in FIG. well,
The thickness may be the same as shown in FIG. If the dimension example is shown, the pipe | tube diameter of the screw cylinder 15a, 16a is 120-14.
When the thickness is 0 mm and the wall thickness is 6 mm, the wall thickness of the pipe wall of the unit pile main body 6a is set to 3.2 mm, 4.8 mm, or 6 mm. When the unit pile main body 6aa is made thinner with the same pipe diameter (outer diameter) as the screw cylinders 15a and 16a,
b is an outer diameter of the unit pile main body 6aa and the screw cylinders 15a, 1b.
It is assumed that there is a step so as to substantially match the inner diameter of 6a.
This step is obtained by partially drawing a steel pipe to be the backing metal 15b, 16b.

Next, the procedure of this building horizontal restoration method is shown in FIG.
And FIG. In the case where the foundation 2 shown in FIG. 2A is a subsidence portion, the ground 5 near the indoor or outdoor side of the foundation 2 is slightly dug (FIG. 2B), and a reaction force removing jig 3 is provided on the side surface. Is attached with the anchor 11. The jack 4 is attached to the jack-side member 9 of the reaction force removing jig 3, and the jack-side member 9 is attached to the uppermost position with respect to the base-side member 8. In this state, the unit pile 6a of the pile 6 is arranged below the jack 4. At this time, if the ground 5 is excavated as shown in FIG.
a can be used. In addition, the ground 5 does not necessarily need to be excavated, and when excavating, only the periphery of the pile 6 is sufficient.
In the case where a bracket-type foundation receiving member 23 (FIG. 3) is to be arranged below the foundation 2 later, the excavation hole 22 has a size that allows the arrangement. After such preparation, the unit pile 6a is pressed into the ground 5 with the jack 4 (D). The reaction force of the press-fitting is applied to the foundation 2 via the reaction force removal jig 3.
Is obtained. After extending the jack 4 to the stroke end, for example, as shown in FIG. 2E, the jack 4 is shortened to change the mounting position of the jack side member 9 to the base side member 8 downward, and the jack 4 is extended again. Press the unit pile 6a. The press-fitting by the jack 4 and the change of the mounting position of the jack-side member 9 are repeated.

When the unit pile 6a is pressed into the ground 5 to some extent (F), the mounting position of the jack-side member 9 to the foundation-side member 8 is returned to the upper end position (G), and the unit pile 6a in the press-fitted state is returned.
Then, the next unit pile 6a is connected by screwing the steel pipe pile joint 14. At this time, if there is sufficient height between the lower surface of the jack 4 and the upper unit pile 6a, the jack-side member 9
The upper unit pile 6a can be screwed in by sliding upward and screwing again without removing the base unit 8 from the base side member 8.

After the unit piles 6a are joined in this way, the piles 6 are press-fitted with the jacks 4 again, and the press-fitting by the jacks 4 and the change of the mounting position of the jack-side member 9 are repeated. In this manner, the required number of unit piles 6a are spliced into the ground by connecting an arbitrary number of them. When the press-fitting of the pile 6 is completed, the reaction force removing jig 3 is removed from the foundation 2, and the foundation receiving member 23 is welded to the pile 6 at a height in contact with the lower surface of the foundation 2 as shown in FIG.
In this example, the base receiving member 23 is of a bracket type in which a vertical pile connecting member 23a, a horizontal base receiving member 23b, and a diagonal member 23c are welded in a triangular shape as shown in FIG. A reinforcing plate (not shown) is welded within the triangle. For the pile connection material 23a, channel steel is used outward,
Welding is possible on both flanges corresponding to unit piles 6a of various diameters. The base receiving member 23b and the diagonal member 23c are formed of a section steel such as a channel steel or an H-section steel. In the example of FIG. 4, the hanging portion 24 is provided on the base portion 2 b of the foundation 2, and the pile 6 is disposed in the hanging portion 24, so that the pile 6 is brought closer to the foundation core.

After the foundation receiving member 23 is welded to the pile 6 in this manner, concrete serving as a joint 2c is joined to the top end surface of the foundation 2 to make the entire top end surface of the foundation 2 uniform.
Also, concrete 2d is poured into the excavation hole 22 so that the vicinity of the upper end of the foundation receiving member 23 and the pile 6 is filled (FIG. 3).
(B)). Thereafter, the upper part of the base 2b of the foundation 2 is backfilled with earth and sand. At the time of the jointing of the foundation concrete, a portion above the foundation 2 of the building 1 is previously lifted by the foundation jack-up method or the like for the subsidence portion of the foundation 2.

In this way, the subsidence of the foundation 2 is reinforced by the pile 6, and the building 1 can be horizontally restored by the foundation jack-up method. In addition, the pile 6 by the jack 4 is used.
At the time of press-fitting, the jack 4 may be returned to the shortened state after press-fitting to some extent, and the press-fitting may be performed again with the dummy pile 25 interposed between the unit pile 6a and the jack 4 as shown in FIG. good. By using the dummy piles 24 in this manner, shortage of the stroke of the jack 4 is compensated, and the long unit piles 6a can be press-fitted. The dummy piles 25 may be prepared in various lengths, and may be sequentially replaced. Thereby, press-fitting of the longer unit pile 6a becomes possible. The dummy pile 25 has an outer diameter of a stepped shaft at the lower end, and its small-diameter end 25a is fitted into the upper end of the unit pile 6a to prevent misalignment. When the dummy pile 25 is used, the reaction force removing jig 3 does not have to be a vertical slide type.

FIG. 6 shows another embodiment. In this example,
After excavating the ground in the vicinity of the foundation 2, as described above with reference to FIG.
The hanging portion 24 is formed on the base 2b which is wider than the rising portion 2a (FIG. 6B). Thereafter, the bracket-shaped base receiving member 23A for receiving the base portion 2b is attached to the base 2. This base receiving member 23A has a base pile joining material 23a protruding above the basic receiving material 23b, and its upward protruding portion is a rising portion 2a of the foundation 2.
And, it attaches to the inner surface of the hanging part 24 with an anchor (FIG. 6C). Thereafter, the rising portion 2a of the foundation 2
Then, the reaction force removing jig 3 is attached to the rising portion 2a of the foundation 2 with an anchor. The reaction force removing jig 3 may be attached to the foundation receiving member 23A in addition to the rising portion 2a of the foundation 2 with a bolt or the like. The other configuration of the reaction force removing jig 3 is the same as that of the embodiment of FIG. After the reaction force removing jig 3 is attached in this manner, the pile 6 connected with the plurality of unit piles 6a is used in the same manner as described above with reference to FIGS. 2C to 2H in the first embodiment. The ground 5 to the specified depth
(FIGS. 6D and 6E). However, the pile 6
It is arranged in the hanging part 24. Press-fitting with jack 4
This may be performed using the dummy pile 25 as described above with reference to FIG.

When the press-fitting of the pile 6 is completed, the reaction force removing jig 3 is removed from the foundation 2 as shown in FIG. 6 (F), and the foundation receiving member 23A is left on the foundation 2. Next, as shown in FIG. 6 (G), the remaining base receiving member 23A is joined to the pile 6 by welding or the like via an appropriate spacer 33 serving as a connecting member. A portion where the foundation receiving member 23A, the lower portion of the foundation 2 and the upper end of the pile 6 are joined is cast with concrete 2d and embedded therein. After placing the concrete 2d, the excavation hole 22 of the ground 5 is backfilled. In this way, the foundation 2 with the pile 6
Is completed. Thereafter, the portion above the foundation 2 of the building 1 is lifted and horizontally restored as described above. As described above, the suspension portion 24 is provided in the base portion 2b of the foundation 2 and the pile 6 is disposed therein. Thereafter, the periphery of the pile 6 and the foundation receiving member 23A including the suspension portion 24 are embedded with concrete 2d. Since the distance between the pile 6 and the foundation core is short, the foundation can be reinforced firmly and with high working efficiency.

FIG. 7 shows still another embodiment. In this example, instead of using the bracket type base receiving member 23 as in the examples of FIGS. 3 and 4, FIG. 7A or FIG.
As shown in FIG.
7 shows a pile press-in process when connecting the foundation 2 and the pile 6 by attaching A and 23B. This press-fitting process is performed in the excavation hole 2
2 is the same as the embodiment of FIG. 2 except that the base 2 is shallow enough to expose the base 2b of the base 2. After the press-fitting is completed, the entire reaction force removing jig 3 attached to the foundation 2 is removed, and as shown in FIG. 7 (A), the foundation receiving member 23A is attached to the rising portion 2a of the foundation 2 with the anchor 26. The pile 6 is joined to the member 23A by welding or other methods. In addition, instead of removing the entire reaction force removing jig 3, FIG.
(B), leaving the base side member 8 and the jack side member 9
A base receiving member 23B may be attached instead of (FIG. 1).
The pile 6 is joined to the foundation receiving member 23B. Thus, the pile 6 is attached to the rising portion 2 of the foundation 2 by the foundation receiving members 23A, 23A.
In the case of connection at B, the excavation amount of the ground 5 can be further reduced.

Further, in each of the above embodiments, the foundation 2 is raised later by splicing concrete without lifting the foundation 2, but depending on the degree of settlement of the foundation 2 and the condition of the ground 5, the pile 6 , The foundation 2 is lifted. In this case, when the foundation 4 is lifted until the level of the building 1 is restored, the press-fitting of the pile 6 is finished, and the pile 6 and the foundation 2 are connected by the foundation receiving members 23, 23A, 23B as in each of the above examples. . Alternatively, after the press-fit of the pile 6 is completed, the support force may be obtained by the pile 6 and the foundation 2 may be lifted by the jack 4 or another jack. In this case, the foundation jack-up is not required, but if the foundation 2 cannot be lifted sufficiently,
Horizontal restoration of the building 1 by jacking up the foundation and horizontal restoration by press-fitting the pile 6 are used together.

In the above embodiment, the pile 6 is a steel pipe pile, but the pile 6 may be made of a section steel such as an H-section steel or a channel steel.

[0024]

According to the horizontal restoration method of a building according to the present invention,
There is no need to excavate the ground greatly, and there is little need to carry out the soil even on narrow land, and there is no need for earth retaining, and work can be performed safely. Moreover, it is not necessary to use heavy equipment for excavation and the like, and even when pile driving is performed inside the building, the area for removing the floor can be minimized. In addition, the unit pile can be lengthened, and the required length of pile can be driven efficiently. When a hanging portion is formed in the base portion of the foundation and the pile is disposed therein, the pile and the foundation core can be brought closer to each other, and the pile can be more firmly supported. Further, according to the steel pipe pile joint and the unit pile of the present invention, the quality of the joint when the unit pile is joined is stabilized. Further, it is not necessary to increase the thickness of the unit pile main body for forming the thread groove, and the material cost can be reduced. ADVANTAGE OF THE INVENTION According to the reaction force removal jig of this invention, when implementing this invention method, even if the stroke of a jack is short, a long unit pile can be press-fitted and efficient pile driving can be performed.

[Brief description of the drawings]

1 (A) is a cutaway side view showing an embodiment of a building horizontal restoration method according to the present invention, FIG. 1 (B) is an enlarged front view of a base side member of the reaction force removing jig, and FIG. It is a fracture | rupture top view of a side member.

FIG. 2 is an explanatory diagram of a procedure of the building horizontal restoration method.

FIG. 3 is an explanatory diagram of a process following the process of FIG. 2 of the building horizontal restoration method.

FIG. 4A is a perspective view showing a relationship between a foundation receiving member, a foundation, and a pile in the horizontal restoration method of the building, and FIG. 4B is a cutaway front view showing another example of the pile press-fitting method.

5A is a cross-sectional view of a steel pipe pile joint, FIG. 5B is a vertical cross-sectional view of a unit pile obtained by welding the steel pipe pile joint, and FIG. 5C is an intermediate omitted vertical cross-sectional view of another example of the unit pile. is there.

FIG. 6 is an explanatory diagram of a procedure of a building horizontal restoration method according to another embodiment of the present invention.

FIG. 7 is an explanatory diagram of a procedure of a building horizontal restoration method according to still another embodiment of the present invention.

FIG. 8 is a partial plan view showing a mounting position of a base reaction force removing jig.

FIG. 9 is a partial plan view showing another example of a mounting position of a reaction force removing jig on a foundation.

FIGS. 10A and 10B are explanatory diagrams each showing an example of a post-process of the procedure in FIG. 7;

FIG. 11 is a sectional view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... building, 2 ... foundation, 2a ... rising part, 3 ... reaction force removal jig, 4 ... jack, 5 ... ground, 6 ... pile, 6a ... unit pile, 6aa ... unit pile main body, 7 ... outer wall, 8 ... Foundation side members,
9 ... Jack side member, 10 ... Coupling mechanism, 14 ... Steel pipe pile joint, 15 ... Female thread side joint member, 16 ... Male thread side joint member, 15a, 16a ... Screw tube, 15b, 16b ... Back metal, 23, 23A ... Foundation receiving member, 24 ... hanging part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-60928 (JP, A) JP-A-1-304217 (JP, A) JP-A 48-19011 (JP, A) JP-A 54-19028 79905 (JP, A) JP-A-7-102555 (JP, A) Japanese Utility Model Application Sho 61-84734 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) E02D 35 / 00-37 / 00 E02D 27/34 E02D 27/48 E02D 5/24

Claims (10)

(57) [Claims] 1. A horizontal restoration method for a building in which a reaction force removing jig is mounted on a side surface of a rising portion of a foundation of a building, and a pile supported by the reaction force removing jig is used to press a pile into the ground near the foundation. 2. The pile is connected with a plurality of unit piles. After the lower unit pile is pressed into the ground to some extent, the upper unit pile is connected to the lower unit pile, and the connected pile is 2. The method according to claim 1, wherein the jack is press-fitted with the jack again. 3. The method according to claim 1, wherein a hanging portion is formed in the base portion of the foundation, and a pile pressed into the ground is disposed in the hanging portion. 4. The reaction-force removing jig has a base-side member attached to a foundation and a jack-side member having a jack receiving portion, and the jack-side member is vertically attached to the base-side member. The mounting is carried out so as to be changeable, and after the press-fitting of the stake to some extent with the jack, the mounting position of the jack-side member of the reaction force removing jig is changed downward, and then the press-fitting by the jack is continued. The method of claim 1 or claim 2 or claim 3. 5. The method according to claim 2, wherein the unit pile is a steel pipe pile, and has a thread portion at an end for joining the unit piles. 6. The pile receiving device according to any one of claims 1 to 5, wherein after completion of the press-fitting of the pile, a foundation receiving member for transmitting the supporting force of the pile to the foundation is attached to the pile, and concrete is transferred to the top end surface of the foundation. Building horizontal restoration method. 7. A reaction force is obtained by the press-fitted pile, and a press-fitting process is performed.
The building horizontal restoration method according to any one of claims 1 to 5, wherein the foundation of the building is raised with a jack after the press-fitting, or during the press-fitting process and after the press-fitting. 8. A female thread side joint member and a male thread side joint member, wherein the female thread side joint member is a steel pipe screw cylinder having an internal thread formed on an inner diameter surface, and a part of the screw cylinder is internally fitted into the screw cylinder. The male screw side joint member comprises a steel pipe screw cylinder having an external thread formed on an outer diameter surface, and a screw cylinder made of a steel pipe having a short cylindrical backing metal protruding from a base end of the screw cylinder. And a short tube-shaped backing metal part of which is fixed inside and protrudes from the base end of the screw tube, and the female screw side joint member and the male screw side joint member are each made of a steel pipe unit pile body. A steel pipe pile joint, wherein the backing metal is fitted into an end of the pipe pile to weld between the screw cylinder and the unit pile body. 9. A female pipe-side joint member and a male screw-side joint member are provided at both ends of a steel pipe unit pile main body, and the female screw-side joint member includes a steel pipe screw cylinder having an internal thread formed on an inner diameter surface thereof. A steel pipe having a short cylindrical backing metal partly fitted and fixed in the screw cylinder and protruding from the base end of the screw cylinder, wherein the male screw-side joint member has a male screw formed on an outer diameter surface. And a short cylindrical backing metal partly fitted into and fixed to the screw cylinder and protruding from the base end of the screw cylinder, the female screw side joint member and the male screw side joint member The threaded tube has a pipe wall thicker than the unit pile main body, and the female screw side joint member and the male screw side joint member are each inserted with the backing metal at an end of the unit pile main body and screwed. Unit pile welded between the tube and the unit pile body. 10. A base-side member attached to a side surface of a rising portion of a foundation, and a jack-side member having a jack receiving portion for press-fitting a pile at an upper portion, wherein the jack-side member is vertically attached to the foundation-side member. A reaction force removal jig equipped with a coupling mechanism that can be mounted so that the mounting position can be changed.