Correction method for differential settlement of building

Abstract

To provide a correction method to facilitate the correction of differential settlement in a residential building.SOLUTION: The correction method includes: laying a laminated structure made of polystyrene geofoam for correction in a surface layer portion where future correction may be required, depending on ground strength and soil quality at the time of constructing a new house; and, when differential settlement occurs, injecting resin into the laminated structure to align the foundation with a higher portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] To provide a method for easily correcting differential settlement when constructing a new house on land including soft ground by replacing the anticipated soft ground with ground for correcting differential settlement. [Background technology]

[0002] Currently, when differential settlement occurs in a building due to factors such as traffic vibrations or liquefaction of the ground caused by earthquakes, or over time, a commonly used method of correcting this is to use a jack to lift up the sunken part of the building together with the foundation, and then fill in the gap between the foundation and the base with a hardening material such as mortar or grout to solidify it.However, correcting differential settlement after it has occurred inevitably requires large-scale construction work and is expensive.

[0003] Furthermore, when building a new house, even if the supporting layer is shallow, if the ground is a mixture of sandy ground layers with high groundwater levels and soft ground layers, simple surface improvement work or the driving of columnar piles is carried out, and no costly liquefaction countermeasures are taken.

[0004] These are currently common countermeasures for differential settlement in new construction, but as a countermeasure for solving the problem of differential settlement in future residential buildings, correction technology is disclosed in Patent Document 1.

[0005] The correction technology disclosed in Patent Document 1 involves heating a heating element installed between the underside of the foundation of a building supported on a polystyrene foam artificial ground and the top surface of the polystyrene foam artificial ground, thereby melting and removing that part of the top surface of the artificial ground, and causing the building to sink under its own weight on the side where the part was removed, thereby correcting uneven settlement of the building. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Application No. 2004-253439 Summary of the Invention

[0007] However, in the construction method of Patent Document 1, the polystyrene foam underneath the concrete foundation is melted to lower the foundation, so that the uneven settlement is corrected by matching it to the lower level of the subsidence rather than the original position.

[0008] This approach can sometimes cause problems, such as the road being lower than the existing roads around it.

[0009] This causes a new problem: rainwater seeps into the lowered areas, making drainage difficult. [Problem to be solved by the invention]

[0010] For this reason, the inventor of the present application has proposed a method for correcting the subsidence of a building that easily returns the part of the foundation, including the part that has sunk, to its original height, rather than a correction method that lowers the part of the foundation that has not sunk to the height of the foundation that has sunk.

[0011] Furthermore, this repair method must be able to be carried out in the narrow ground space between the block wall that was built after construction. [Means for solving the problem]

[0012] The result of the study was that the surface layer of the ground, including the soft layer, A support layer of laminated polystyrene foam plates is placed in a trench formed by excavation under the foundation of a building, and in response to uneven settlement that occurs after the building is constructed due to earthquakes, traffic vibrations, etc., a spray pipe is inserted into the polystyrene foam plates and a filler is injected to raise the lowered foundation part and correct the tilt of the house.

[0013] In the second invention, the polystyrene foam laminated plate is stacked horizontally on the bottom part of the house foundation and combined with a polystyrene foam control plate at a 90-degree angle.

[0014] As a third invention, the polystyrene foam laminate is laid in a state sandwiched between the foundation of the house and the surface improvement or support piles.

[0015] As a fourth invention, the polystyrene foam laminate is made by laminating polystyrene foam plates, and grooves or notches are provided at the interface between each plate to guide the flow of filler. [Effects of the Invention]

[0016] The combination of the expanded polystyrene laminate and filler of the present invention makes it possible to efficiently and inexpensively repair residential buildings that have suffered from differential settlement. BEST MODE FOR CARRYING OUT THE INVENTION

[0017] First, the polystyrene foam laminate 6 shown in Figure 1 is made by stacking any number of polystyrene foam plates 3, each about 10 mm to 100 mm thick, and temporarily fixing them together with simple tape or the like. At both interfaces of the polystyrene foam plates 3, shallow polystyrene foam grooves 4 and polystyrene foam plate notches 5 are made, as shown in Figures 3 and 4, to allow the filler to easily spread.

[0018] This polystyrene laminated plate 6 is installed so as to be located below the house foundation 8 as shown in Figure 2, and as shown in Figure 5, it is placed in the space in the trench installed above the surface improvement 13 of the ground 2 on the house site 15, and the house foundation 8 is constructed on top of it.

[0019] As shown in FIG. 6, it is arranged below the foundation 8 of the house on the site of the house.

[0020] When arranging these polystyrene foam laminates, they may not be arranged continuously but may be arranged in an island pattern depending on the weight of the house.

[0021] A 10 mm to 100 mm thick styrene foam control plate 7 may be placed on this styrene foam laminated plate 6 to allow the filler 12 to be filled later to be filled efficiently and to suppress lateral expansion into adjacent areas.

[0022] Since the residential foundation 8 of the building is established after the polystyrene foam laminated plate 6 and the polystyrene foam control plate 7 are laid, construction can be carried out smoothly without the need for difficult work.

[0023] Next, we will explain how to correct the uneven settlement that occurred after the construction of Building 1 using this polystyrene laminated board 6.

[0024] As shown in Figures 7 and 8, a drill bit 9 attached to the tip of a drill is used to drill a nozzle hole of 50 mm or more inside the polystyrene foam laminate 6 from the ground, and the filler delivered from the filling device 11 is filled into the polystyrene foam laminate.

[0025] This filler 12 can be a fast-hardening type such as cement or water glass, or rigid foamed urethane can be injected into the sunken area as shown in Figure 9 (1), and foamed to raise the foundation of the house in an orderly manner as shown in (2), thereby correcting the subsidence.

[0026] In addition to correcting the subsidence of a house foundation, for example when pulling a house, the polystyrene foam laminated plate and polystyrene foam control plate are located under the foundation, so they can be easily cut or thermally melted to create space under the foundation for installing a hydraulic jack.

[0027] The present invention is not limited to the above embodiment and various modifications are possible. For example, the polystyrene foam laminated plates 6 do not need to be laid on the entire foundation of the continuous footing, and can be laid at intervals depending on the weight of the building. [Brief explanation of the drawings]

[0028] [Figure 1] FIG. 10 is a cross-sectional view showing an embodiment in which a polystyrene foam laminate plate is laid under a house foundation. [Figure 2] FIG. 10 is a perspective view showing grooves and notches formed in a polystyrene foam plate. [Figure 3] 3 is a cross-sectional view showing the AA′ cross section of the polystyrene foam plate shown in FIG. 2. [Figure 4] A cross-sectional view showing an embodiment in which a polystyrene foam laminate plate and a polystyrene foam control plate are embedded in the groove portion of the surface improvement. [Figure 5] FIG. 10 is a plan view showing the arrangement of a house foundation, a polystyrene foam laminated plate, and a polystyrene foam control plate. [Figure 6] FIG. [Figure 7] FIG. 10 is a cross-sectional perspective view showing a state in which a nozzle is inserted into a polystyrene foam laminate and a filler is injected. [Figure 8] Cross-sectional views showing the state before (1) and after (2) inserting a nozzle into a polystyrene foam laminate and injecting filler. [Figure 9] FIG. 10 is a cross-sectional view showing how a sinking residential foundation is corrected by injecting a filler. [Explanation of symbols]

[0029] 1. Building 2 Ground 3 Styrofoam boards 4 Styrofoam board groove 5 Styrofoam board notch 6 Styrofoam laminate 7 Styrofoam control board 8. Housing Foundations 9 Excavation Bits 10 nozzles 11 Filling equipment 12 Fillers 13 Surface layer improvement 14 GL 15 Residential Sites

Claims

1. In the surface layer of the ground, including the soft layer, A method for correcting differential settlement of a building, characterized in that a support layer of laminated polystyrene foam plates is provided in grooves formed by excavation at multiple positions under the foundation of the building, and in response to differential settlement that occurs after the construction of the building due to earthquakes, traffic vibrations, etc., an injection pipe is inserted into the laminated polystyrene foam plates and a filler is injected to correct the tilt of the house.

2. 2. The method for correcting uneven settlement of a building according to claim 1, wherein the expanded polystyrene laminated plate is a combination of a horizontal layer and an expanded polystyrene control plate at a 90-degree angle to the bottom part of the foundation of the house.

3. 3. The method for correcting differential settlement of a building according to claim 1 or 2, wherein the expanded polystyrene laminate is laid in a state sandwiched between the foundation of the house and the surface improvement or support piles.

4. A method for correcting uneven settlement of a building as described in claims 1 to 3, characterized in that the polystyrene foam laminate is made by stacking polystyrene foam plates, and grooves or notches are provided at the interface of each plate to guide the flow of filler.

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