JP5994065B2 - Building subsidence correction foundation structure - Google Patents

Description

  The present invention relates to a subsidence-correcting foundation structure of a building, and more particularly, to a subsidence-correcting foundation structure of a building that can correct uneven subsidence that has occurred in a building by lifting the foundation of the subsidence.

  For example, if the ground that forms the back marsh, coastal landfill, delta lowland, drowning valley, coastal sand bar, etc. is formed from peat-like ground or ground with slow consolidation, etc., it is a soft ground There are many. Such soft ground has a low ground bearing capacity and is likely to continue to be consolidated. Therefore, buildings constructed above soft ground may cause subsidence such as non-uniform subsidence (unequal subsidence). is there.

  In the event of uneven settlement in the building, as a method of correcting this, other than the method of correcting the settled portion of the building by lifting it with the foundation using, for example, a jack device as a lift-up means, the foundation of the building Disposed between the (foundation slab) and the supporting ground in a position suitable for lifting the foundation, a plurality of bags (pressure backs) were laid as lift-up means and placed in the sinked part A method has been developed in which water is pressed into a bag body and inflated to lift the foundation of the sinked portion (see, for example, Patent Document 1).

  Moreover, by using a plurality of bags (hardened material filling bags) laid between the foundation of the building and the supporting ground as a lift-up means, by injecting the hardened material from the injection hose into the bag body and expanding the bag body, When repairing the inclination of the building by pushing up the sinking side of the building, the lower frame with the bag shaped into a substantially U-shaped cross section, and the cross section attached to the lower frame so that it can move up and down A method of repairing unequal settlement has been developed that allows the building to be repaired efficiently by attaching it to the inside of a box-shaped formwork consisting of an approximately U-shaped upper frame. (For example, refer to Patent Document 2).

JP-A-63-32025 Japanese Patent Laid-Open No. 9-60027

  However, according to the technique for correcting the uneven settlement of the building by inflating the bag body by press-fitting the conventional water or hardener, it is laid in advance between the foundation of the building and the foundation ground at the time of building construction. In addition, since the plurality of bags are flexible and can be deformed to be easily damaged, it is difficult to perform maintenance and replacement afterwards, particularly for bags placed in the inner region of the outer periphery of the building foundation. If a long period of time elapses until unequal subsidence occurs, the bag may not be able to operate properly due to damage to the bag or the like. In addition, for example, in a case where a bag body is mounted inside a box-shaped form consisting of a lower frame body and an upper frame body having a substantially U-shaped cross section, this is corrected after unequal settlement occurs in the building. If it is to be installed at the time, a gap for attaching the formwork to the lower part of the foundation of the building must be formed by excavation, and such a gap is excavated in a region inside the outer peripheral portion of the foundation of the building. Since it is difficult to form, it is difficult to lift the entire foundation of the building in a well-balanced manner because the bag body cannot be installed in the inner region of the outer peripheral portion.

  The present invention makes it possible to install the lift-up means when unequal subsidence occurs in the building and correct it, so that maintenance and replacement of the lift-up means can be easily performed, Provide a subsidence-correcting foundation structure for the building that can lift the entire building foundation in a well-balanced manner by making it possible to easily install lift-up means inside the outer periphery of the building foundation. The purpose is to do.

  The present invention relates to a subsidence-correcting foundation structure for a building that can correct a non-uniform subsidence occurring in a building by lifting the foundation of the subsidence, and a plurality of elevating supports arranged along the lower surface of the foundation of the building And a lift-up means installed in each of one or more lifting support boxes selected from these lifting support boxes, at least one of which is a U-shaped crossing. It has a substantially rectangular hollow cross-sectional shape comprising an upper support portion having an upper surface pressure plate and a lower support portion having a lower surface pressure plate, and the upper surface pressure plate can be raised and lowered relative to the lower surface pressure plate. The elevating support box is guided to open to the foundation ground of the outer peripheral portion of the building foundation through a communication path formed by a hollow box provided along the lower surface of the building foundation. The lift-up means can communicate with the inside of the selected one or more lifting support boxes via the introduction opening and the communication passage by work from outside the foundation of the building. The above object is achieved by providing a subsidence-correcting foundation structure for a building that lifts the foundation of a subsidized part by raising the upper surface bearing plate with respect to the lower surface bearing plate. It is a thing.

  And according to the subsidence correction foundation structure of the building of this invention, it is preferable that the said lift-up means is an expansion | swelling bag body which is inflated and deformed by a fluid pressure being loaded inside from a flat state.

  According to the building subsidence correction foundation structure of the present invention, the lifting support boxes are arranged in a plurality of rows along the lower surface of the building foundation, and in each row, between adjacent lifting support boxes. The hollow box is interposed, and the lifting support box arranged at the end or the end opening of the hollow box opens to the foundation ground of the outer peripheral portion of the foundation of the building as the introduction opening It is preferable.

  Furthermore, according to the subsidence correction basic structure of the building of the present invention, it is preferable that the hollow box has a substantially rectangular hollow cross-sectional shape that is substantially the same as the lifting support box.

  Furthermore, according to the subsidence correction foundation structure of a building of the present invention, it is preferable that the elevating support box and the hollow box are connected to the foundation ground when the building is constructed.

  Further, according to the building subsidence correction foundation structure of the present invention, the lifting support box and the hollow box are connected to the foundation ground when correcting the subsidence generated in the building after the building is constructed. Are preferably installed.

  Furthermore, according to the subsidence correction foundation structure of the building of this invention, it is preferable that the said raising / lowering support box and the said hollow box are connected and installed in the foundation ground by the propulsion method.

  Furthermore, according to the subsidence correction foundation structure of the building of the present invention, both the upper support portion and the lower support portion constituting the lifting support box have a U-shaped cross-sectional shape. preferable.

  According to the subsidence correction basic structure of the building of the present invention, the upper support part constituting the lifting support box has a U-shaped cross-sectional shape, and the lower support part is a flat plate member. It is preferable that

  According to the subsidence correction foundation structure of the present invention, it is possible to install the lift-up means when the subsidence occurs in the building and correct it, thereby maintaining and replacing the lift-up means. It is possible to easily lift and lift the entire foundation of the building in a well-balanced manner by making it possible to easily install lift-up means inside the outer periphery of the foundation of the building. it can.

1 is a schematic perspective view illustrating a subsidence correction foundation structure for a building according to a preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates a building settlement subsidence foundation structure according to a preferred embodiment of the present invention, wherein (a) is a schematic view taken along line A-A in FIG. 1 before a lift-up means is operated to lift the building foundation. FIG. 2B is a schematic cross-sectional view taken along line AA of FIG. 1 in a state where the foundation of the building is lifted. (A) is the B section expanded sectional view of Drawing 2 (a), and (b) is the B 'section expanded sectional view of Drawing 2 (b). (A)-(c) is a schematic vertical view explaining the process of installing a raising / lowering support box and a hollow box in connection with a foundation ground by a propulsion construction method. The lifting support box of another form will be described. (A) is a schematic cross-sectional view of the state before the lift-up means is operated to lift the foundation of the building, and (b) is a schematic illustration of the state where the foundation of the building is lifted. It is sectional drawing.

  A subsidence correction foundation structure 10 of a building according to a preferred embodiment of the present invention shown in FIG. 1 is constructed as a small-scale building constructed on, for example, a landfill created by embankment above a soft ground, for example, Adopted as a structure to correct the inclination of the residential building by pushing up the sinking part of the residential building when the residential building has been subsidized for several months to several decades after construction, for example. It has been done. 1-5, only the part of the foundation 11 of the building which abbreviate | omitted the housing | casing part is shown as a principal part of the residential building by which subsidence is corrected by this embodiment.

  And as shown in FIGS. 1-4, the subsidence correction foundation structure 10 of this embodiment is the foundation which makes it possible to correct the uneven subsidence which arose in the house building by lifting the foundation 11 of the subsidence part. A plurality of lifting support boxes 12 arranged along the lower surface of the foundation 11 of the building, and one or more lifting support boxes 12 selected from these lifting support boxes 12 (see FIG. 2). It is comprised by the lift-up means 15 each installed in the inside. The elevating support box 12 includes an upper support portion 13 having an upper surface support plate 13a and a lower support portion 14 having a lower surface support plate 14a, of which at least one (both in the present embodiment) has a U-shaped cross section. And a substantially rectangular hollow cross-sectional shape (see FIGS. 3A and 3B), the upper surface support plate 13a can be moved up and down relative to the lower surface support plate 14a, and the lift support box 12 is It opens to the foundation ground 20 in the outer peripheral portion of the building foundation 11 through the communication passage 17 by the hollow box 16 (see FIGS. 1 and 4C) provided along the lower surface of the building foundation 11. Communication with the introduction opening 18 is possible. The lift-up means 15 is installed by being introduced into the selected one or more lifting support boxes 12 through the introduction opening 18 and the communication passage 17 by work from outside the building foundation 11. Then, by raising the upper surface bearing plate 13a with respect to the lower surface bearing plate 14a, the sinked portion of the foundation 11 can be lifted (see FIGS. 2A and 2B).

  Further, in the present embodiment, the lift-up means 15 is an inflatable bag body 19 that is inflated and deformed when a fluid pressure is applied to the inside from a flat state (see FIGS. 3A and 3B).

  In the present embodiment, the building foundation 11 is a solid foundation in which a foundation slab 11b is arranged inside the outer peripheral rising portion 11a as shown in FIG. The inner rising portion 11c is also provided at the inner slab of the foundation 11 surrounded by the outer peripheral rising portion 11a at an appropriate position where, for example, a partition wall is arranged in accordance with the floor plan of the first floor portion of the house building. 11b is provided upright.

  In this embodiment, the foundation 11 of the building has a substantially horizontally long planar shape in which, for example, the width in the east-west direction is larger than the width in the north-south direction. In addition, for example, the amount of subsidence of the foundation 11 in the east side portion is larger than the amount of subsidence of the foundation 11 in the west side portion, so that the subsidence is inconsistent. In the present embodiment, by the method described later, the entire foundation 11 of the building is pushed up by a predetermined lift-up amount while eliminating the uneven settlement, and the settlement generated in the building 10 can be effectively corrected. Yes.

  In this embodiment, the foundation ground 20 immediately below the foundation 11 of the building firmly supports the load from the building loaded via the foundation 11 and distributes it to the lower ground and transmits it to the ground below. In order to efficiently support the load from the building, it is preferable that the ground crushed stone is spread and ground improvement or the like is performed.

  In this embodiment, the lifting support box 12 arranged along the lower surface of the foundation 11 of the building is an upper support portion having a U-shaped cross section as shown in FIGS. 3 (a) and 3 (b). 13 and the lower support portion 14 having the same U-shaped cross-sectional shape are overlapped with the open side of the U-shape facing each other so that the upper surface bearing plate 13a is placed on the lower surface bearing plate 14a. In a state in which it has not been raised (see FIG. 3A), for example, it has a flat, oblong, substantially rectangular, hollow cross-sectional shape having a width of about 100 to 300 mm and a height of about 50 to 200 mm. ing.

  Moreover, the upper support part 13 and the lower support part 14 which comprise the raising / lowering support box 12, Preferably, using a steel plate with a thickness of about 2-20 mm, for example, bending one iron plate, or three pieces The steel plate can be easily formed so as to have a U-shaped cross-sectional shape having a desired size by, for example, integrating the steel plates by welding. In this embodiment, the elevating support box 12 is formed to have an axial length of, for example, about 500 to 1000 mm.

  The function of the expansion bag body 19 installed as the lift-up means 15 in the elevating support box 12 when the uneven settlement is corrected is inflated and deformed when a fluid pressure is applied to the inside from the flat folded state. It is possible to use various known bags including In the present embodiment, the inflatable bag body 19 breaks even when a high water pressure of, for example, about 0.2 to 0.3 MPa is applied to the inside using a sheet material similar to the sheet material used for a fire hose, for example. It can be easily formed in a state where there is no such thing. The inflatable bag body 19 has, for example, an inlet attached to one end thereof, and is formed so as to have a thickness of, for example, about 20 to 40 mm in a state before being inflated flatly (FIG. 3 ( a)). The inflatable bag body 19 is formed so that it can be inflated and deformed to have a height of about 60 to 360 mm, for example, when it is inflated by injecting, for example, water as a pressurized fluid from the inlet. (See FIG. 3B).

  As a result, the inflatable bag body 19 expands inside the lifting support box 12, thereby raising the upper surface support plate 13 a of the upper support portion 13 with respect to the lower surface support plate 14 a of the lower support portion 14 and sinking. The base 11 of the part can be pushed up (lifted up) together with the residential building with a lift-up amount in the range of about 10 to 160 mm, for example.

  A hollow box 16 that forms a communication path 17 for communicating the lifting support box 12 with an introduction opening 18 that opens to the foundation ground 20 (see FIGS. 1 and 4C) is, for example, made of concrete or metal. It is a box. In this embodiment, the hollow box 16 is formed as a concrete cylindrical body with both ends being open surfaces, and is substantially the same as the lifting support box 12, for example, having a width of about 100 to 300 mm and a height. Is formed so as to have a flat, horizontally long, substantially rectangular, hollow cross-sectional shape having a size of about 50 to 200 mm. Moreover, in this embodiment, the hollow box 16 is formed so that it may be longer than the raising / lowering support box 12, for example, about 1000-2000 mm.

  And in this embodiment, as shown in FIG. 1, the raising / lowering support box 12 is arranged in multiple rows (2 rows in this embodiment) along the lower surface of the foundation 11 of the building. The hollow box 16 is interposed between the adjacent lifting support boxes 12, and the end opening of the lifting support box 12 or the hollow box 16 (hollow box 16 in the present embodiment) disposed at the end is provided. The opening 18 is open to the foundation ground 20 in the outer peripheral portion of the foundation 11 of the building.

  Further, the elevating support box 12 and the hollow box 16 may be installed in advance in a row on the foundation ground 20 prior to forming the foundation 11 of the building at the time of construction of the house building. However, in this embodiment, when correcting the uneven settlement that has occurred in the residential building after a long period of time has elapsed since the construction of the residential building, the lower surface of the foundation 11 of the building is preferably obtained by a propulsion method. Are installed on the foundation ground 20 in a row in a row.

  In order to install the lifting support box 12 and the hollow box 16 in a row along the lower surface of the building foundation 11 by the propulsion method, for example, as shown in FIG. 1 and FIG. A portion of the ground adjacent to one short side of the foundation 11 of the building is dug down to form a propulsion work yard 21 that is one level lower than the surrounding ground surface. Further, as shown in FIG. 4A, the bearing wall 22, the propulsion mount 23, the propulsion jack 24, and the like are installed in the formed propulsion work yard 21.

  Thereafter, as shown in FIG. 4 (b), the elevating support box 12 and the hollow box 16 are alternately connected in the axial direction via a known joint mechanism so that these hollow interiors communicate with each other. For example, while pushing the ground of the face of the front end with a water jet, the propulsion jack 24 sequentially pushes it from the propulsion mount 23 toward the base ground 20 directly below the foundation 11 of the building.

  Here, the propulsion method using a water jet is a well-known method for propelling and installing a cylindrical body such as a square steel pipe in the ground, and is a pressure water pressure feed having a jet water injection nozzle at the tip. In the state where the tube is inserted into the cylindrical body, jet water is sprayed from the spray nozzle toward the face surface at the tip of the tubular body, thereby cutting the earth and sand on the face surface with the jet water and cutting the earth and sand. Is pushed into the ground with a propulsion jack while sequentially adding the cylindrical body to the main pushing side through the hollow interior of the cylindrical body together with the mud water from the jet water. This is a known construction method that can be propelled to depth and embedded.

  Moreover, in this embodiment, it is preferable to attach the tip hollow box 25 having a blade edge to the tip portion in the propulsion direction and propel the lifting support box 12 and the hollow box 16 so that the face surface is The earth and sand can be cut more easily.

  In the present embodiment, when the lifting support box 12 and the hollow box 16 are propelled to the foundation ground 20 while cutting the earth and sand on the face, a propulsive force is applied so that the tip portion in the propulsion direction moves upward. Further, for example, by devising the shape of the blade edge and processing and forming it, the lifting support box 12 and the hollow box 16 are made to follow the lower surface of the foundation 11 without being separated from the lower surface of the foundation 11 of the building. In this state, it is possible to easily and continuously arrange the foundation ground 20 directly below the foundation 11.

  And in this embodiment, by the above-mentioned propulsion method, as shown in FIG. 1, the raising / lowering support box 12 and the hollow box 16 are alternately arranged along the lower surface of the foundation 11 of a building, for example, 2 rows. And a position in which the front end portion in the propulsion direction is close to the other short side portion from one short side portion where the propulsion work yard 21 is provided in the foundation 11 of the building having a substantially horizontally long rectangular planar shape. Until then, it will be installed on the foundation ground 20 immediately below the foundation 11 of the building. Accordingly, the plurality of lifting support boxes 12 are distributed and distributed in a well-balanced manner on the entire foundation ground 20 immediately below the foundation 11 of the building, including the inner area of the outer periphery of the foundation 11 of the building. become. In addition, the end opening of the hollow box 16 arranged at the end on the side of the propulsion work yard 21 in each row opens as an introduction opening 18 in the foundation ground 20 in the outer peripheral portion of the foundation 11 of the building in the propulsion work yard 21. Will do.

  When the elevating support box 12 and the hollow box 16 are continuously arranged in a row on the foundation ground 20 immediately below the foundation 11 of the building by the propulsion method, as shown in FIG. The propulsion base 23, the propulsion jack 24, etc. are removed.

  In this embodiment, in order to correct the uneven subsidence that has occurred in a residential building using a plurality of lifting support boxes 12 that are distributed and arranged on the foundation ground 20 immediately below the foundation 11 of the building, From the support box 12, one or more lift support boxes 12 arranged at positions suitable for lifting the foundation 11 of the building in a balanced manner are selected, and lift-up means 15 is provided inside these lift support boxes 12. Each of the inflatable bag bodies 19 is installed.

  In order to install each of the inflatable bag bodies 19 inside the selected lifting support box 12, a building is connected with one end of a pressure hose 26 (see FIG. 4C) connected to the inlet of the inflatable bag body 19. The work from the outside of the foundation 11 can be easily performed by, for example, work from the propulsion work yard 21. In other words, for example, using an operation rod having a function of pushing in and pulling out the expansion bag body 19, the introduction opening 18 opened in the propulsion work yard 21, the communication path 17 by the hollow box 16, and the intermediate position The expansion bag body 19 is introduced through the hollow interior of the lifting support box 12 to be pushed in, so that the work of installing each of the expansion bag bodies 19 inside the selected lift support box 12 is easily performed. be able to.

  When each of the inflatable bag bodies 19 is installed in one or more selected lifting support boxes, as shown in FIG. 4 (c), a pressure feed with one end connected to the inlet of each inflatable bag body 19 The other end of the hose 26 is connected to the pressure water pump 27 to pump the pressure water, so that the expansion bag body 19 is inflated by the fluid pressure of the pressure water. Thereby, as shown in FIGS. 2A and 2B and FIGS. 3A and 3B, the upper surface support plate 13a of the upper support portion 13 is raised with respect to the lower surface support plate 14a of the lower support portion 14. By doing so, it becomes possible to lift the foundation 11 of the subsidence part and to effectively correct the uneven subsidence generated in the residential building.

  Further, the pressure of the pressure water pumped from the pressure water pumping pump 27 to each of the inflatable bag bodies 19 via the pumping hose 26 and the pumping amount are collectively controlled by, for example, a control device, so that the foundation of the sinked portion is obtained. 11 can be lifted in a more accurate and stable state, and the uneven settlement caused in the residential building can be corrected more effectively.

  After correcting the uneven settlement that occurred in the residential building by lifting the foundation 11 of the subsidence, for example, filling the solidified material into the gap between the foundation 11 of the building and the foundation ground 20 is solidified. By doing so, the load of the residential building can be supported in a stable state. Further, pressure water is removed from the inflated inflatable bag body 19 and contracted, and the contracted inflated bag body 19 is connected to the communication path 17 or the introduction opening 18 by the hollow box 16 using, for example, the above-described operation rod. To collect through. Furthermore, both ends of the elevating support box 12 and the hollow boxes 16 and 25 arranged in a row on the foundation ground 20 directly below the foundation 11 of the building are closed using, for example, a filling solidified material, The lift support box 12 and the hollow boxes 16 and 25 are left in a state of being embedded in the foundation ground 20 in a state in which the inside of the hollow is filled and solidified as necessary, and solidified. Furthermore, the propulsion work yard 21 that has been dug down is backfilled, and the surrounding ground is leveled, and the construction for correcting the uneven settlement caused in the residential building is completed.

  And according to the subsidence correction foundation structure 10 of this embodiment provided with the above-mentioned structure, after the unequal subsidence occurs in the residential building (building), the expansion bag body 19 which is the lift-up means 15 The expansion bag body 19 can be easily maintained and replaced, and the expansion bag body 19 can be easily placed in the inner region of the outer peripheral portion of the foundation of the building 11. It is possible to lift the entire building foundation 11 while controlling it in a balanced manner.

  That is, according to the subsidence correction basic structure 10 of this embodiment, it is comprised by the several raising / lowering support box 12 and the expansion bag body 19 each installed in the inside of the selected raising / lowering support box 12, and the raising / lowering support box 12 is comprised. Has a substantially rectangular hollow cross-sectional shape, and the upper surface bearing plate 13a can be moved up and down relative to the lower surface bearing plate 14a, and the lifting support box 12 is connected via the communication path 17 by the hollow box 16. In addition, since it is possible to communicate with the introduction opening 18 that opens to the foundation ground 20 in the outer peripheral portion of the foundation 11, the inflatable bag body 19 extends over a long period of time until the uneven settlement occurs after the building is constructed. It is not necessary to leave the base ground 20 in the state immediately below the foundation 11, and after the uneven settlement occurs in the building, work from the outside of the foundation 11 of the building is corrected. Therefore, since each of the inflatable bag bodies 19 can be installed inside the selected lifting support box 12 by being introduced through the introduction opening 18 and the communication passage 17, the inflatable bag body 19 is buried in the ground. Therefore, maintenance management and replacement can be easily performed, and the expansion bag body 19 can be appropriately diverted and used.

  Moreover, since the elevating support box 12 and the hollow box 16 are formed as strong members made of, for example, iron or concrete, these hollow shapes can be easily formed even when buried in the ground for many years. The lifting support box 12 may be provided at any position including the inner region of the outer periphery of the foundation 11 of the building so as to communicate with the introduction opening 18 that opens in the foundation ground 20. Therefore, it is possible to install the inflatable bag body 19 also inside the lifting support box 12 in the region inside the outer peripheral portion of the building foundation, and to lift the entire building foundation 11 while controlling it in a well-balanced manner. .

  Note that the present invention is not limited to the above embodiment, and various modifications can be made. For example, the lift-up means does not necessarily need to be an inflatable bag body that inflates and deforms from a flat state, and has a size and shape that can be introduced through a communication path by a hollow box, for example, a jack device using a hydraulic jack, etc. It may be.

  In addition, the lifting support box and the hollow box need not be installed continuously on the foundation ground when the building is built by, for example, the propulsion method, and then the uneven settlement caused in the building is corrected. According to the known construction method, it can be installed on the foundation ground when correcting the uneven settlement, and can also be installed in advance on the foundation ground at the time of building construction. When the building is constructed and installed on the foundation ground, it should be installed in a state where the hollow interior of the elevating support box and hollow box to be installed are held, for example, by closing both ends. When correcting the uneven settlement in the building, the closed end is dug up to open the closed state, thereby forming the introduction opening and installing the lifting support box inside the selected lifting support box As a result, the same effects as those of the subsidence correction foundation structure 10 of the above-described embodiment can be obtained.

  Further, it is not always necessary that both the upper support portion and the lower support portion constituting the lifting support box have a U-shaped cross section, and only one of them is a U-shaped cross section. It may have a shape. As shown in FIGS. 5A and 5B, the upper support portion 13 ′ of the lifting support box 12 ′ is formed to have a U-shaped cross section, and the lower support portion 14 ′ is formed in a flat plate shape. It can also be formed as a plate member. In the elevating support box 12 ′ shown in FIGS. 5 (a) and 5 (b), the expansion bag body 19 ′ installed therein is expanded from the flat state (see FIG. 5 (a)) by the fluid pressure of the pressure water. Then, when the upper surface bearing plate 13a ′ of the upper support portion 13 ′ is raised with respect to the lower surface bearing plate 14a ′ of the lower support portion 14 ′, the foundation 11 of the sinked portion is lifted (FIG. 5B). Reference), the expansion bag body 19 ′ is supported in the up-and-down direction by pressing the wall surface 20a of the foundation ground 20 to inflate the expansion bag body 19 ′ in the lateral direction at the portion below the upper support portion 13 ′. It is possible to effectively prevent the box 12 'from protruding outward and expanding.

DESCRIPTION OF SYMBOLS 10 Building subsidence correction foundation 11 Building foundation 11b Foundation slab 12 Lift support box 13 Upper support part 13a Upper surface support plate 14 Lower support part 14a Lower surface support plate 15 Lift-up means 16 Hollow box 17 Communication path 18 Introduction opening 19 Expansion Bag body 20 Foundation ground 21 Propulsion work yard 22 Bearing wall 23 Propulsion base 24 Propulsion jack 25 Tip hollow box 26 Pressure hose 27 Pressure water pressure pump

Claims (9)

A subsidence-correcting foundation structure of a building that can correct uneven subsidence that has occurred in a building by lifting the foundation of the subsidence,
A plurality of lifting support boxes arranged along the lower surface of the foundation of the building, and lift-up means respectively installed in one or more lifting support boxes selected from these lifting support boxes,
The elevating support box has a substantially rectangular hollow cross-sectional shape including an upper support portion having an upper surface support plate and a lower support portion having a lower surface support plate, at least one of which has a U-shaped cross section. At the same time, the upper support plate can be raised and lowered relative to the lower support plate,
And the said lifting support box can communicate with the introduction opening which opens to the foundation ground of the outer peripheral part of the foundation of the building through the communication path by the hollow box provided along the lower surface of the foundation of the building,
The lift-up means is installed inside the selected one or more lifting support boxes by being introduced from the outside of the foundation of the building through the introduction opening and the communication path. The subsidence correction foundation structure of a building which raises the foundation of the subsidence part by raising the upper surface bearing plate relative to the lower surface bearing plate.   The building subsidence correction foundation structure according to claim 1, wherein the lift-up means is an expansion bag body that expands and deforms when a fluid pressure is applied to the inside from a flat state.   The elevating support boxes are arranged in a plurality of rows along the lower surface of the foundation of the building, and in each row, the hollow box is interposed between the adjacent elevating support boxes, and arranged at the ends. The building subsidence correction foundation structure according to claim 1, wherein an end opening of the lift support box or the hollow box opened to the foundation ground of the outer peripheral portion of the foundation of the building as the introduction opening.   The subsidence correction foundation structure of a building according to any one of claims 1 to 3, wherein the hollow box has a substantially rectangular hollow cross-sectional shape that is substantially the same as the lifting support box.   The building subsidence correction foundation structure according to any one of claims 1 to 4, wherein the elevating support box and the hollow box are installed continuously on a foundation ground during construction of the building.   The said raising / lowering support box and the said hollow box are any one of Claims 1-4 installed continuously with a foundation ground, when correcting the uneven settlement which arose in the building after building a building. Building subsidence modified foundation structure.   The building subsidence correction foundation structure according to claim 6, wherein the elevating support box and the hollow box are connected to the foundation ground by a propulsion method.   The building subsidence correction foundation structure according to any one of claims 1 to 7, wherein both the upper support portion and the lower support portion constituting the elevating support box have a U-shaped cross-sectional shape.   The said upper support part which comprises the said raising / lowering support box is equipped with the U-shaped cross-sectional shape, The said lower support part is a flat plate member, The any one of Claims 1-7. Building subsidence modified foundation structure.

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