JP4615792B2 - Connection structure for easy repair of uneven settlement between foundation and foundation structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connection structure in which a foundation and a structure on a foundation can be easily repaired by different settlement.
[0002]
[Prior art]
In buildings built in soft ground areas, the buildings may cause uneven settlement due to the consolidation settlement of the ground. As a method of repairing a building against such subsidence, the anchor foundation bolts are temporarily disconnected from the concrete foundation and the foundation structure such as the foundation, and the foundation is raised from the top surface of the concrete foundation by jacking up. There is a method in which a pad or the like is filled between the base and the top of the foundation, and the foundation is connected to the concrete foundation again with anchor bolts.
[0003]
[Problems to be solved by the invention]
However, in this method of repairing dissimilar settlement due to the rise of the foundation, there is a case where the restoration cannot be performed unless the foundation is greatly raised from the top surface of the concrete foundation because the degree of disparity of the irregular settlement is large. The height of the male screw rod part of the anchor bolt protruding upward from the top surface of the concrete foundation may be insufficient, and it may be difficult or impossible to connect the foundation to the concrete foundation again with this anchor bolt. .
[0004]
Therefore, it is conceivable to increase the height dimension of the male threaded rod portion of the anchor bolt protruding upward from the top surface of the concrete foundation in advance, but this is often not possible due to the relationship with others.
[0005]
Also, when repairing uneven settlement, loosen the nut that is screwed to the anchor bolt and connects the foundation to the concrete foundation, and accesses the top surface of the concrete foundation where the foundation is installed. Even this may be difficult or impossible, and repair of uneven settlement may be difficult or impossible.
[0006]
In view of the conventional problems as described above, the present invention provides a foundation structure and a concrete foundation even when the foundation structure such as the foundation is greatly raised from the top surface of the concrete foundation in the restoration of the uneven settlement. Can be easily connected again, and in connection with others, the nut connecting the foundation structure to the concrete foundation can be loosened, or the top of the concrete foundation where the foundation structure is installed To provide a connecting structure and a connecting method capable of easily repairing uneven settlement of a foundation and a structure on the foundation, which can easily repair uneven settlement even when it is difficult or impossible to access the surface portion. Is an issue.
[0007]
[Problems to be solved by the invention]
The above problem is that an opening is provided on the side surface of the rising portion of the concrete foundation, and the upper screw through-hole penetrating in the vertical direction that opens to the top of the foundation and the inside of the opening in the upper foundation concrete portion sandwiching the opening. Is provided,
A male threaded rod is inserted through this upper threaded hole,
A first nut that abuts the upper surface of the opening and restricts the male screw rod from being pulled upward is screwed onto the male screw rod portion protruding into the opening.
A second nut that regulates the upward disengagement of the structure on the base is screwed onto the male threaded rod portion protruding upward from the base top surface.
With these first and second nuts, the structure on the foundation is connected to the concrete foundation,
By loosening the first nut through the opening and raising the male screw rod protruding into the opening, the protruding length of the male screw rod from the base top surface can be increased. It is solved by a joint structure that facilitates repair of uneven settlement between foundation and foundation structure.
[0008]
In this structure, by loosening the first nut through the opening and raising the male screw rod protruding into the opening, the protruding length of the male screw rod from the base top surface can be increased. Therefore, even when the structure on the foundation has to be lifted greatly from the top surface of the concrete foundation in the repair of uneven settlement, the protruding length dimension of the male screw rod from the top surface of the foundation is increased. The structure on the raised foundation and the concrete foundation can be easily connected again using the same male threaded rod.
[0009]
In addition, the height of the male threaded rod protruding from the basic top surface before repair can be increased during the repair, so that the height of the basic top surface of the original male threaded rod before repairing can be increased. The height dimension can make this smaller, so that it does not cause any inconvenience in the relationship with others.
[0010]
Furthermore, the male threaded rod can be lifted through the opening provided in the side of the intermediate part in the height direction of the rising part of the concrete foundation. Thus, there is no need to raise the male screw rod, and the male screw rod can be easily raised through the opening.
[0011]
In the above structure, the male screw rod is provided below the second nut, and the male screw rod is raised through the opening so that the structure on the foundation is supported by the receiver and rises together with the male screw rod. It should be made to do.
[0012]
In this case, if the male screw rod is raised through the opening in the repair of the uneven settlement, the foundation structure is also raised simultaneously by the receiver, so when raising the foundation structure, the top surface of the foundation It is not necessary to operate the second nut on the side, and therefore, repair of uneven settlement can be easily performed.
[0013]
In addition, as the male threaded rod is lifted through the opening as described above, the structure on the foundation is also raised, so that the structure on the foundation can be moved without accessing the top surface of the foundation that is easily involved. Can be raised.
[0014]
Further, in the above structure, the lower basic concrete portion sandwiching the opening is provided with a lower screw hole extending on the same axis as the upper screw hole and opening into the opening, and the male screw rod is It is also inserted into the lower screw hole,
A third nut that contacts the lower surface in the opening and restricts the lowering of the male screw rod may be screwed onto the male screw rod below the first nut in the opening.
[0015]
In this structure, the male screw rod itself can be connected and integrated with the concrete foundation at a required height position by the third nut and the first nut. Further, when the male threaded rod is raised, the third nut supports the male threaded rod and can be held at the height position so that the male threaded rod is not lowered unintentionally.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
[0017]
The connection structure of the embodiment shown in FIGS. 1 and 2 is a case where the connection structure is used for connection between an internal foundation that does not face the outside of a building and a structure on the foundation. Reference numeral 1 denotes a concrete foundation, which is a cloth foundation. Reference numeral 2 denotes a base plate as a structure on the foundation.
[0018]
A side surface of the rising portion 1 a of the concrete foundation 1 is provided with a through opening 3, and an upper concrete portion sandwiching the opening 3 is opened in a vertical direction that opens between the top surface of the foundation 1 and the inside of the opening 3. A penetrating upper screw hole 4 is provided. Further, a lower screw through hole 5 that extends on the same axis as the upper screw through hole 4 and opens into the opening 3 is provided in the lower basic concrete portion sandwiching the opening 3. These upper and lower screw through-holes 4 and 5 can be formed, for example, by placing the steel pipes 6 and 6 in the foundation concrete.
[0019]
A male screw rod 7 is inserted so as to pass to the upper and lower screw through holes 4 and 5. The male threaded rod 7 has a first nut 8 that contacts the upper surface in the opening 3 and restricts the male threaded rod 7 from coming off upward in the opening 3, and a lower surface in the opening 3. A third nut 10 that contacts and restricts the male screw rod 7 from descending is screwed together.
[0020]
The male screw rod portion 7a protruding upward from the top surface of the base 1 is screwed with a second nut 9 that abuts on the upper surface of the base plate 2 and restricts the base plate 2 from coming off. The male threaded rod 7 is provided with a receiver 13 that is positioned lower than the second nut 9 and receives the base plate 2 from below.
[0021]
In addition, the male screw rod 7 is positioned between the first nut 8 and the third nut 10 in the opening portion 3, and upper and lower fourth and fifth nuts 11 for raising the male screw rod 7. , 12 are screwed together.
[0022]
The first nut 8 is tightened to the upper surface in the opening 3, the third nut 10 is tightened to the lower surface in the opening 3, and the third nut 10 is tightened to the upper surface of the base plate 2. 2 is sandwiched between the third nut 10 and the top surface of the foundation 1 and connected to the concrete foundation 1. The receiver 13 is placed in a recess 14 provided in the top surface portion of the concrete foundation 1.
[0023]
In the connection structure as described above, in the case where uneven settlement occurs in the building, the repair can be performed as follows. That is, first, as shown in FIG. 3A, the first nut 8 is loosened and lowered through the opening 3. Then, as shown in FIG. 3 (b), the fourth and fifth nuts 11 and 12 in the opening 3 are positioned at appropriate height positions, and the jacks up between the fourth and fifth nuts 11 and 12. As shown in FIG. 3C, the auxiliary iron plate 15 is lifted by a hydraulic jack 16 or the like. As a result, the base plate 2 is supported by the receptacle 13 of the male screw rod 7 and rises from the top surface of the foundation 1 together with the male screw rod 7.
[0024]
After raising the male threaded rod 7 to the repair height position in this way, as shown in FIG. 4 (d), the third nut 10 is lowered to the lower surface position in the opening 3 and the male threaded rod 7 is lowered. As shown in FIG. 4 (e), padding is performed between the base plate 2 and the top surface of the foundation 1 with plates 17. Finally, as shown in FIG. 4 (f), the first nut 8 is fastened to the upper surface in the opening 3. By tightening the first nut 8, the base plate 2 and the filling 17 are sandwiched between the first nut 8 and the second nut 9, and the base plate 2 is firmly connected to the concrete foundation 1 at the restoration height position, and the uneven settlement of the building is prevented. It will be repaired.
[0025]
As described above, according to the above-described connection structure, even when the base plate 2 has to be greatly raised from the top surface of the concrete foundation 1 in the repair of the uneven settlement, the male from the top surface of the foundation 1 is obtained. The height dimension of the projecting portion 7a of the screw rod 7 can be increased by raising the male screw rod 7, and the raised base plate 2 and the concrete foundation 1 can be easily re-used using the same male screw rod 7. Can be linked. In addition, the height of the protrusion of the basic top surface of the male threaded rod 7 before the repair can be kept small, so that there is no inconvenience in the relationship with others.
[0026]
Moreover, since the raising operation of the male threaded rod 7 can be performed through the opening 3, it is not necessary to access the top surface portion of the foundation 1 which is easily involved. Further, when the base plate 2 is lifted, it is not necessary to operate the second nut 9, and the base plate 2 can be lifted by lifting the male screw rod 7 through the opening 3. There is no need to access the top surface of the concrete foundation 1. Further, in the connection between the base plate 2 and the concrete foundation 1 after the base plate 2 is raised, it is only necessary to tighten the first nut 8 through the opening 3, and it is not necessary to operate the second nut 9. There is no need to access the top. Therefore, even if the foundation 1 is an internal foundation that does not face the outdoors, the underfloor space is used to easily repair the uneven settlement without accessing the top surface of the concrete foundation 1. I can go.
[0027]
Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the support 13 is provided, and by raising the male screw rod 7, the base plate 2 that is a basic structure is also raised, and the male screw rod 7 and the base plate 2 are raised. However, the base 13 is not lifted even when the male screw rod 7 is lifted, and the base plate 2 is lifted separately by jacking up or the like. It is good also as a connection structure.
Moreover, in said embodiment, although the opening part 3 provided in the side surface of the standup part 1a of the concrete foundation 1 is comprised by the hole opened on the both sides | surfaces of the standup part 1a, It may consist of a recess that opens only on the side surface. Further, the lower screw through hole 5 and the third nut 10 sandwiching the opening 3 of the concrete foundation 1 may be omitted, and the operation part for raising the male screw rod 7 is the fourth and fifth nuts. Others may be adopted instead of the ones according to 11 and 12. Moreover, this invention may be used for the external foundation which faces the outdoors. The structure on the foundation is not limited to the base plate 2 as described above, but may be a base or another structure. The point is that the male projecting upward from the top surface of the concrete foundation 1. Any structure may be used as long as it is connected by a screw rod portion.
[0028]
【The invention's effect】
Since the present invention is as described above, even when the foundation structure such as the foundation is greatly raised from the top surface of the concrete foundation in the restoration of the uneven settlement, the foundation structure and the concrete foundation are again connected. Can be easily connected. In addition, it is difficult or even impossible to loosen the nuts that connect the foundation structure to the concrete foundation or to access the top surface of the concrete foundation where the foundation structure is installed. Even if possible, the uneven settlement can be easily repaired.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view showing a connection structure between a foundation and a structure on a foundation according to an embodiment.
FIG. 2 is a front view of the same.
FIGS. 3A to 3C are cross-sectional side views sequentially showing a method for repairing dissimilar subsidence together with FIGS.
FIGS. 4 (a) to 4 (f) are cross-sectional side views sequentially showing a method for repairing dissimilar settlement along with FIGS. 3 (a) to 3 (c).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Concrete foundation 1a ... Rising part 2 ... Base plate (structure on foundation)
DESCRIPTION OF SYMBOLS 3 ... Opening part 4 ... Upper screw through-hole 5 ... Lower screw through-hole 7 ... Male screw rod 8 ... 1st nut 9 ... 2nd nut 10 ... 3rd nut 13 ... Receptacle

Claims (3)

An opening is provided on the side of the rising part of the concrete foundation,
An upper screw through-hole penetrating in the vertical direction that opens to the top of the foundation and the opening is provided in the upper foundation concrete portion sandwiching the opening,
A male threaded rod is inserted through this upper threaded hole,
A first nut that abuts the upper surface of the opening and restricts the male screw rod from being pulled upward is screwed onto the male screw rod portion protruding into the opening.
A second nut that regulates the upward disengagement of the structure on the base is screwed onto the male threaded rod portion protruding upward from the base top surface.
With these first and second nuts, the structure on the foundation is connected to the concrete foundation,
By loosening the first nut through the opening and raising the male screw rod protruding into the opening, the protruding length of the male screw rod from the base top surface can be increased. Connecting structure that facilitates repair of uneven settlement between foundation and foundation structure. The male threaded rod is provided below the second nut, and the male threaded rod is provided with a support. By raising the male threaded rod through the opening, the foundation structure is supported by the receiver and is raised together with the male threaded rod. The joint structure of claim 1, wherein the foundation and the structure on the foundation are easily repaired by dissimilar settlement. The lower basic concrete portion sandwiching the opening is provided with a lower screw through hole that extends on the same axis as the upper screw through hole and opens into the opening, and the male screw rod is the lower screw through hole. Is also inserted inside,
The base according to claim 1 or 2, wherein a third nut that abuts the lower surface of the opening and regulates the descending of the male screw rod is screwed onto the male screw rod below the first nut in the opening. Connecting structure that allows easy repair of uneven settlement with the structure on the foundation.

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