JP2010126955A - Sunk floor correction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide sunk floor correction method capable of accurately correcting a sunk floor inexpensively in a short construction period. <P>SOLUTION: In the floor constructed on a ground, injection holes are drilled for injecting an expandable resin at and around the center part in the sunk area. Next, the expandable resin is injected to the underside of the floor through the injection hole drilled at the center part to raise the floor around the center part a predetermined amount by the expansion force of the expandable resin. Then the expandable resin is injected to the underside of the floor through the injection holes drilled around the center part to raise the floor around the center part a predetermined amount by the expansion force of the expandable resin. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for correcting a submerged floor using an expandable resin.

  For example, in factories and warehouses, the floor surface sinks locally due to uneven sinking or heavy objects placed on it, causing troubles in work, and in offices and homes, the floor surface sinks to open and close the door. Difficulties may arise. Conventionally, in response to local settlement of the floor surface, an overlay method in which concrete is placed on the surface of the subsidized floor surface, or after removing the concrete floor, sand or gravel is thrown into the recessed portion of the ground. Then, the flatness of the floor surface was ensured by a method of placing concrete again. However, the overlay method has problems such as generation of dust due to the chiseling work and cracking easily in the thin part of the overlay. Further, the latter method also has a problem that dust is generated due to the chiseling work and it takes days to complete the work.

  In Patent Document 1, in order to solve such a problem, a part of the soil concrete is cut to form a cut reaction force plate, and a reaction force plate is taken from the cut reaction force plate and installed via a rack. A method of correcting the uneven settlement of soil concrete by lifting the soil concrete and forming a gap between the soil concrete and the ground, filling the formed gap with mortar, and hardening it is described.

JP 2000-199237 A

  However, the invention disclosed in Patent Document 1 has a problem that it is necessary to install a gantry for lifting the soil concrete, and the construction is large and costly, and the preparation and construction of the construction take time.

  The present invention has been made to solve such problems, and provides a subsidence floor correction method that can accurately correct a subsidence floor at a low cost and in a short construction period. Objective.

  In order to achieve the above-mentioned object, the subsidence floor correction method according to the first aspect of the present invention comprises an inflatable resin injection hole in the center part of the subsidence range of the floor constructed on the ground and around the center part. And inflating resin below the floor from the injection hole drilled in the central portion, expanding the expandable resin to push up the floor around the central portion by a predetermined amount, and successively And a step of injecting an inflatable resin under the floor from an injection hole perforated around the base, and expanding the inflatable resin to push up the floor around the central portion by a predetermined amount.

  In order to achieve the above object, the subsidence floor correction method according to the second aspect of the present invention includes a step of drilling inflatable resin injection holes in a substantially matrix form in a subsidence range of a floor constructed on the ground. And sequentially injecting expansive resin into the injection holes drilled in the outer row from the injection holes arranged in the corners of the substantially matrix shape, and expanding the expansive resin to place a floor around the injection holes in the outer row. And a step of sequentially injecting an expandable resin for each row of adjacent injection holes, and inflating the expandable resin to push up the floor around the adjacent injection holes by a predetermined amount. To do.

  In order to achieve the above object, the subsidence floor correction method according to the third aspect of the present invention includes a step of drilling inflatable resin injection holes in a substantially matrix form in a subsidence range of a floor constructed on the ground. And an injecting hole formed by sequentially injecting an expandable resin from an injection hole disposed in a corner of the approximately matrix shape into an injection hole drilled to the outside of the approximately matrix shape, and expanding the expandable resin to perforate the outside. The surrounding floor is pushed up by a predetermined amount, and then the inflatable resin is sequentially injected into the injection holes adjacent to the inside of the injection holes drilled on the outside, and the expandable resin is expanded to surround the injection holes adjacent to the inside. And a step of pushing up the floor by a predetermined amount.

  Moreover, in order to achieve the said objective, the subsidence floor correction construction method which concerns on the 4th viewpoint of this invention WHEREIN: In the joint part in which the level | step difference has arisen in the adjacent floor by the subsidence of the ground, the said each of the said said adjacent floors A step of perforating an inflatable resin injection hole in the vicinity of the joint, and an inflatable resin is injected under the floor from an injection hole perforated in a floor having a lower height among the adjacent floors where the step is generated. The resin is expanded to push up the floor having a low height by a predetermined amount, and then an expandable resin is injected under the floor through an injection hole drilled in the floor having a high height, and the expandable resin is expanded to increase the height. A step of pushing a high floor by a predetermined amount, and the step is eliminated by pushing up the low floor and the high floor by the expansion force of the injected expandable resin. And

  Moreover, in order to achieve the said objective, the subsidence floor correction method which concerns on the 5th viewpoint of this invention is each adjacent along the said joint part in the adjacent floor in which the space | gap is formed under the joint part. A step of drilling an inflatable resin injection hole in the floor of the floor, and of each of the adjacent floors, the floor end is largely subsidized or the space formed below the floor is expanded from the injection hole in the floor Injecting an expandable resin to expand the expandable resin, and subsequently injecting the expandable resin from the injection hole in the floor adjacent to the floor into which the expandable resin was injected, and expanding the expandable resin; And filling the voids to support the floor by expansion of the injected expandable resin.

  In order to achieve the above object, the subsidence floor correction method according to the sixth aspect of the present invention is such that a heavy object is placed on the floor constructed on the ground, and the position of the heavy object is centered. In the floor that has been sunk, the step of perforating an inflatable resin injection hole in the vicinity of and around the placement position of the heavy object on the floor, and the weight from the injection hole perforated in the vicinity of the placement position described above An inflatable resin is injected under the object, the inflatable resin is inflated to push up the floor under the heavy object by a predetermined amount, and then expand from the injection hole drilled around the vicinity of the loading position of the heavy object And a step of inflating the expandable resin to push up the floor around the loading position of the heavy object by a predetermined amount.

  The expandable resin may be a foamable urethane resin.

  In addition, the method further includes a step of connecting the floor to an underground beam or a coupling device fixed to the ground, and the coupling device prevents the floor from being pushed up when the expandable resin is expanded. May be.

  In order to achieve the above object, the subsidence floor correction method according to the seventh aspect of the present invention includes a gap formed below the floor due to ground subsidence, or an expansive resin between the floor and the ground. Injecting and pushing up the floor by the expansion force of the expandable resin, monitoring the change in the height of the floor, and stopping the injection of the expandable resin when the rise of the floor is detected .

  In order to achieve the above object, the subsidence floor correction method according to the eighth aspect of the present invention is a solid foundation that has subsided due to the subsidence of the ground. A step of perforating an injection hole, a step of installing a support on the bottom surface portion, and a step of allowing the support to receive a load of an upper structure acting on a solid foundation; and injecting the expandable resin into the injection hole, And a step of inflating the expandable resin to push up the solid foundation within the subsidence range by a predetermined amount.

  The support may be a jack, and the jack may support a horizontal member spanned over the solid foundation.

  ADVANTAGE OF THE INVENTION According to this invention, the correction method of the subsidence floor which can correct | amend the floor which settled in the low cost and short construction period can be provided.

  A subsidence floor correction method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

1A and 1B show a construction diagram of a subsidence floor correction method according to the first embodiment of the present invention. FIG. 1A is a plan view of a subsidence floor, and FIGS. FIG.1 (e) is sectional drawing shown by the arrow II of FIG.1 (a) which showed the correction method of the subsidence floor in order of construction.
As shown in FIGS. 1 (a) and 1 (b), the interstitial floor 10 made of reinforced concrete sinks over a settlement area 10a indicated by a circle, and the amount of settlement is greatest at the center of the settlement area 10a. The cause of the settlement of the interstitial floor 10 is the subsidence of the ground 11 under the interstitial floor 10, and the interstitial floor 10 cannot follow the subsidence of the ground 11. In many cases, voids 12 are formed between them. The construction method according to the first embodiment of the present invention is applied to the soil floor 10 that has sunk.

  First, as shown in FIG.1 (b), the expansible resin injection | pouring hole 13 for inject | pouring the expansible resin 30 into the dirt floor 10 which sunk with the drill drill (not shown) etc. is drilled. As shown in FIG. 1A, for example, the expandable resin injection hole 13 is formed at one location in the center of the subsidence range 10a where the maximum subsidence amount (h) occurs and four locations around it. In addition, although the space | interval of the expansible resin injection hole 13 changes with various conditions, such as the subsidence range 10a of the earth floor 10, and the amount of subsidence, it shall be about 0.8 thru | or 3 m. Further, the diameter of the expansive resin injection hole 13 can be set as appropriate depending on the subsidence range 10a of the earth floor 10 and the amount of subsidence, but about 16 mm is sufficient.

  Next, as shown in FIG. 1 (c), the expandable resin 30 is injected from the injection gun 20 into the under floor 10 into the expandable resin injection hole 13 drilled in the center of the subsidence range 10 a. The injection gun 20 is connected to two injection pumps 22 that store the material of the expandable resin 30 and supply it to the injection gun 20. The injection gun 20 mixes the material of the expandable resin 30 supplied by the injection pump 22 and injects the expandable resin 30 under the dirt floor 10. The injection gun 20 is fixed to an approximately U-shaped injection gun jig 21, and the tip thereof is inserted into the expandable resin injection hole 13. The injection gun 20 may be injected with the expandable resin 30 by manually inserting its tip into the expandable resin injection hole 13.

The expandable resin 30 is made of a mixture of foamable polyurethane resin, for example. The performance of the expandable resin 30 required for carrying out the present invention is that the volume expands approximately 2 to 40 times from the initial state of mixing with the injection gun 20 until solidifying in the ground 11. Solidification starts in 50 seconds, the approximate expansion is completed within 5 minutes, the strength of about 90% is obtained within 15 minutes, the solidification is carried out for about 30 minutes, and further solidification, It is preferable that secondary foaming does not occur.
Such an expandable resin 30 is composed of, for example, two materials ejected from the injection gun 20 and mixed. The first material is a water-soluble polyol-based mixture, for example, a uretec resin manufactured by Bay System, the Netherlands. The second material is, for example, Uristel 10 of an isocyanate mixture manufactured by Bay System, the Netherlands. These two materials are stored in the respective infusion pumps, and the volume of the first material: volume of the second material is 1: 1 to 1 depending on the type and application location of the expandable resin 30 or the desired performance. .5, the expansive resin 30 suitable for the above-described performance can be manufactured by collision-mixing both materials with the injection gun 20.

  The expansive resin 30 thus injected expands under the interstitial floor 10 and presses the interstitial floor 10 upward. Then, the expandable resin 30 further expands its volume and pushes up the floor 10. The position of the surface of the interstitial floor 10 to be pushed up by injection into the center of the subsidence range 10a is set to about −20 mm, which is the final target level, to reduce bending stress acting on the interstitial floor 10 for the time being. In addition, when inject | pouring the expansible resin 30 under the interstitial floor 10, the quantity of the expansible resin 30 to inject | pour is adjusted, confirming the height change of the interstitial floor 10 using a level, a scale, etc.

  Subsequently, as shown in FIG. 1 (d), the expandable resin 30 is sequentially injected into the remaining expandable resin injection holes 13 with the injection gun 20 under the floor 10. When injecting the expandable resin 30, the position of the surface of the dirt floor 10 is set to the final target level of about −10 mm while adjusting the injection amount of the expandable resin 30. As described above, the reason why the floor 10 is pushed up to a level that does not reach the final target level is that when the expandable resin 30 is injected from one injection hole 13, the floor 10 near the other injection hole 13 is In consideration of being pushed up, it is possible to prevent the floor 10 from being pushed up beyond the target level.

  In this way, the height of the pushed up floor 10 has not reached the final target level as described above. Accordingly, the height of the surface of the soil floor 10 is confirmed, and based on the confirmation result, the expandable resin 30 is injected little by little from the expandable resin injection hole 13, and the height of the surface of the soil floor 10 is reduced. adjust. When it is confirmed that the height of the surface of the dirt floor 10 has reached the final target level position, the injection of the expandable resin 30 is stopped, and finally the expandable resin injection hole 13 is filled with mortar or the like. The subsidence floor correction method according to the embodiment is completed.

By using the subsidence floor correction method according to the first embodiment of the present invention described above, the following effects can be obtained.
(1) In the subsidence floor correction method according to the first embodiment described above, the expansive resin injection hole 13 is drilled in the interstitial floor 10, and the expansive resin 30 is transferred from the drilled expansive resin injection hole 13. It is a method of correcting the settlement of the dirt floor 10 by pouring down. For this reason, this construction method does not require large-scale equipment and can be constructed by several people, so that the construction cost can be reduced.
(2) Moreover, since the expansible resin 30 inject | poured under the dirt floor 10 solidifies in the curing time of about several tens of minutes as mentioned above, construction can be completed in a short construction period. In addition, this construction method does not require large-scale equipment as described above, and can be constructed if a space where several people can work is secured. As a result, the construction method can also complete the construction while the factory or warehouse is in operation.
(3) Moreover, the injection amount of the expansive resin 30 can be adjusted while confirming the height of the surface of the interstitial floor 10, and further, as described above, the expansibility is increased until the interstitial floor 10 is pushed up to the target level position. By injecting the resin 30 a plurality of times, the height of the surface of the dirt floor 10 can be freely controlled. Therefore, it is possible to accurately correct the floor 10 to the final target level position.
(4) Further, as described above, first, the expansive resin 30 is injected into the expansive resin injection hole 13 formed in the central floor 10 to correct the central portion of the subsidence range 10 a of the interfloor floor 10. Subsequently, by injecting the expandable resin 30 into the expandable resin injection hole 13 formed in the periphery thereof, the shape change of the dirt floor 10 when the dirt floor 10 is pushed up (pushed up by the expandable resin 30). The change in curvature due to this can be reduced. Therefore, generation | occurrence | production of the crack etc. of the dirt floor 10 can be suppressed.

The present invention is not limited to the above-described embodiments, and various modifications and applications are possible. 2 is a construction diagram of the subsidence floor correction method according to the second embodiment of the present invention. FIG. 2 (a) is a plan view of the subsidence floor 10, FIG. 2 (b). -FIG.2 (e) is sectional drawing of arrow II-II of Fig.2 (a) which showed the correction method of the settlement floor in order of construction.
Next, the subsidence floor correction method according to the second embodiment of the present invention will be described with reference to FIG. In the present embodiment, as in the first embodiment described above, as shown in FIGS. 2 (a) and 2 (b), the floor 10 sinks over a settling range 10a indicated by a circle, and the amount of subsidence is as follows. Is the largest at the center of the settlement area 10a.

  First, as shown in FIG. 2B, an expandable resin injection hole 13 for injecting the expandable resin 30 is drilled into the soil floor 10 that has been sunk by a drill drill (not shown) or the like. The inflatable resin injection holes 13 are formed in a matrix as shown in FIG. 2A, so that the inflatable resin injection holes 13 can be uniformly formed in the settlement range 10a.

  Next, as shown in FIG. 2 (c), the expansive resin 30 is injected from the injection gun 20 into the underfloor floor 10 into the perforated expansible resin injection hole 13. In the present embodiment, first, the expandable resin 30 is injected from the expandable resin injection hole 13 at the lower left in the drawing of FIG. In addition, when injecting the expandable resin 30, the position of the surface of the dirt floor 10 is set to the final target level of about −10 mm while adjusting the injection amount of the expandable resin 30.

  Subsequently, as shown in FIG. 2 (d), the expandable resin 30 is sequentially injected under the dirt floor 10 from the remaining expandable resin injection holes 13. At this time, the expandable resin 30 is placed so that the height of the surface of the dirt floor 10 is about -10 mm, which is the final target level, in the order of the expandable resin injection holes 13 indicated by the arrows of the broken line a in FIG. inject. Thus, the space | gap formed under the dirt floor 10 can be suppressed by filling the expansible resin 30 from the edge part of the subsidence range 10a.

  Next, the height of a plurality of locations on the surface of the dirt floor 10 is confirmed, and based on the confirmation result, as shown in FIG. 2 (e), the expandable resin 30 is injected little by little from the expandable resin injection hole 13. Finely adjust the height of the surface of the dirt floor 10. When it is confirmed that the height of the surface of the dirt floor 10 has reached the final target level position, the injection of the expandable resin 30 is stopped, and finally the expandable resin injection hole 13 is filled with mortar or the like. The subsidence floor correction method according to the second embodiment is completed.

  Thus, by using the subsidence floor correction method according to the second embodiment of the present invention, the above-described actions and effects can be obtained, and the expansive resin 30 is sequentially applied from the end of the subsidence range 10a of the dirt floor 10. Therefore, there is an effect that it is possible to suppress voids formed under the floor 10. Further, when the settlement of the interstitial floor 10 is large and, as shown in the first embodiment, there is a possibility that cracks or the like may occur in the interstitial floor 10 by pushing up the interstitial floor 10 from the center of the subsidence range 10a. As shown in the embodiment, by sequentially filling the inflatable resin 30 from the end portion, the occurrence of cracks in the dirt floor 10 can be suppressed.

In the above-described embodiment, the expansible resin injection holes 13 drilled in a matrix on the dirt floor 10 have been described. For example, the expansive resin injection holes 13 may be staggered.
Moreover, even if the order of the expansible resin injection hole 13 into which the expansible resin 30 is injected is the order indicated by the arrow of the broken line b, the effect of the present invention can be enjoyed.

  Next, a third embodiment according to the present invention will be described with reference to FIGS. FIG. 3A to FIG. 3C are cross-sectional views showing the correction method in the order of construction when a step is generated in the joint portion of the floor 10. FIG. 3 (a) shows a situation in which the ground 11 below the joint portion 10b of the interstitial floor 10 has locally sunk and a level difference has occurred in the joint portion 10b of the interstitial floor 10. Since the subsidence range of the ground 11 on the left side in the drawing is large, the sagging of the interstitial floor 10 protruding into the subsidence range is larger than that of the adjacent interstitial floor 10. As described above, the construction method according to the third embodiment of the present invention is applied to the dirt floor 10 in which the level difference occurs at the joint portion 10b.

  First, as shown in FIG. 3 (a), the expansive resin injection hole 13 is drilled in the dirt floor 10 on both the left and right sides in the figure using a drill (not shown) or the like.

  Next, as shown in FIG. 3 (b), the expandable resin 30 is injected from the expandable resin injection hole 13 drilled in the dirt floor 10 (left side in the figure) having a large sag. In addition, at the time of injection | pouring of the expansible resin 30, only the target dirt floor 10 can be pushed up by inject | pouring the expansive resin 30 into the under floor 10 in several steps. And if expansion | swelling of the expansible resin 30 pushes up the floor 10 to the same level as the adjacent floor 10, injection | pouring of the expansible resin 30 will be stopped.

Subsequently, as shown in FIG. 3 (c), the expandable resin 30 is injected from the expandable resin injection hole 13 drilled in the adjacent soil floor 10, and the gap 12 formed below the soil floor 10 is formed. Fill. Thereby, the level | step difference which arose in the joint part 10b of the dirt floor 10 can be eliminated.
By the way, when the expansive resin 30 is injected from the side of the floor 10 where the drooping is small, when the expansive resin 30 is filled on the side of the floor 10 where the drooping is large, the level of the floor 10 where the dripping is small is the target level. It may be pushed up above. In order to avoid such a phenomenon, in this embodiment, the expandable resin 30 is injected from the earth floor 10 having a large sag.

  FIG. 4 shows a situation in which the subsidence floor correction method according to the third embodiment described above is applied to a concrete pavement plate 15 of an airport apron. FIG. 4 (a) is a plan view of the concrete pavement plate, FIG. 4 (b) is a cross-sectional view taken along arrows IVb-IVb in FIG. 4 (a). In general, since the concrete pavement plate 15 to be constructed on the apron of the airport is thick, the shape of the concrete pavement plate 15 is maintained even if the ground sinks locally, and the step generated in the joint portion 15a is often small. However, when an airplane, a vehicle, or the like passes through the joint portion 15b, the end portion of the concrete pavement plate 15 that is in a cantilever state at the joint portion 15b may bend, resulting in trouble in traveling of the vehicle or the like.

  In order to eliminate the state of the joint portion 15a of the concrete pavement plate 15, first, as shown in FIG. 4 (a), the expansive resin injection hole 13 is provided in the concrete pavement plate 15 along the joint portion 15a. Drilling is performed at every interval, and the expansive resin injection holes 13 are similarly perforated in the adjacent concrete pavement plate 15 at predetermined intervals. In addition, suppose that the level | step difference has arisen between the concrete pavement plates 15 located in the center of Fig.4 (a) between the adjacent concrete pavement plates 15 except the joint part of the right side in the figure. Next, as described above, the end portion of the concrete pavement plate 15 is largely subsidized or the gap 12 formed below the concrete pavement plate 15 is large, and the concrete pavement plate 15 expands sequentially from the inflatable resin injection hole 13. Insulating resin 30 is injected. Subsequently, the expandable resin 30 is injected from the expandable resin injection hole 13 drilled in the adjacent concrete pavement plate 15 to fill the gap 12 formed under the concrete pavement plate 15. Thereby, the step generated in the joint portion 15a of the concrete pavement plate 15 can be eliminated, and the end portion of the concrete pavement plate 15 is supported by the solidified expansive resin 30, and the traveling property of the vehicle or the like passing through the joint portion 15a is improved. Can be increased.

  Next, the subsidence floor correction method according to the fourth embodiment of the present invention will be described with reference to FIGS. FIG. 5A to FIG. 5D are cross-sectional views showing the correction method of the subsidence floor 10 according to the fourth embodiment of the present invention in the order of construction.

As shown in FIG. 5 (a), a heavy object 16 such as a machine tool is placed on the dirt floor 10, and the dirt floor 10 and the ground 11 locally sink due to the load of the heavy object 16. Is in a state. The construction method according to the fourth embodiment of the present invention is applied to the soil floor 10 that has sunk.
First, as shown in the figure, the expansive resin injection hole 13 for injecting the expansive resin 30 into the vicinity of the loading position of the heavy object 16 and the surrounding floor 10 is provided by a drill (not shown) or the like. Drill multiple holes.

  Next, as shown in FIG. 5 (b), the expansive resin 30 is injected downward from the expansive resin injection hole 13 drilled in the dirt floor 10 near the loading position of the heavy load 16. To do. At this time, a small amount of the expandable resin 30 can be divided into a plurality of times and injected into the under floor 10 to push up the under floor 10 in the loading range of the heavy load 16. When the heavy article 16 is heavy and the expansive resin 30 injected in this way cannot push up the floor 10, the expansive resin 30 is injected from the plurality of expansive resin injection holes 13 at the same time.

  In this way, when the surface of the earth floor 10 at the position where the heavy object 16 is placed is pushed up to a predetermined level (the final target level of about −10 mm), subsequently, as shown in FIG. The expandable resin 30 is injected from the expandable resin injection hole drilled around the place where the object 16 is placed, and the height of the surface of the floor 10 is pushed up to the final target level of about −10 mm.

  Next, as shown in FIG. 5D, the expandable resin 30 is injected little by little from the expandable resin injection hole 13, and the height of the surface of the dirt floor 10 is finely adjusted. When it is confirmed that the height of the surface of the dirt floor 10 has reached the final target level position, the injection of the expandable resin 30 is stopped, and finally the expandable resin injection hole 13 is filled with mortar or the like. The subsidence floor correction method according to the fourth embodiment is completed.

  As described above, by using the subsidence floor correction method according to the fourth embodiment of the present invention, the above-described operations and effects can be obtained, and the subsoil floor 10 that has subsided without moving the heavy object 16 can be corrected. Therefore, it is possible to reduce the amount of work, and it is possible to perform construction while the factory is in operation. In addition, in order to inject and expand the expansive resin 30 into the interstitial floor 10 in a state in which a loading load by the heavy object 16 is applied, a high-strength solidified body corresponding to the weight of the heavy object 16 is placed under the interstitial floor 10. Can be formed.

  Next, a fifth embodiment according to the present invention will be described with reference to FIGS. 6A is a plan view of the first floor portion of the building, and FIGS. 6B to 6D are cross-sectional views taken along line IV-IV in FIG. The correction method of the subsidence floor concerning an embodiment is shown in construction order.

  As shown in FIGS. 6A and 6B, the building 40 includes four upright columns 41, underground beams 42 connecting independent foundations (not shown), and a floor 10. Yes. The dirt floor 10 sinks over the settlement range 10a indicated by a circle in the figure, and the amount of settlement is greatest at the center of the settlement range 10a. The dirt floor 10 is not connected to the underground beam 42.

First, as shown in FIG. 6B, the earth floor 10 and the underground beam 42 are connected by a connecting device 43. As the connecting device 43, for example, an adhesive anchor bolt can be used. The reason for connecting the earth floor 10 and the underground beam 42 with the connecting device 43 as described above is as follows.
As described above, since the interstitial floor 10 and the underground beam 42 are not connected, when the rigidity of the interstitial floor 10 is high, the interstitial floor 10 is entirely formed by the expansive resin 30 injected under the interstitial floor 10. There is a risk of being pushed up. In this case, it is impossible to correct only the settlement area 10a of the floor 10 to correct the settlement of the floor 10. Therefore, by connecting the interstitial floor 10 and the underground beam 42, the interstitial floor 10 is prevented from being pushed up as a whole, and only the subsidence range 10a of the interstitial floor 10 can be pushed up.

  Next, as shown in FIG. 6C, an expandable resin injection hole 13 for injecting the expandable resin 30 is drilled into the soil floor 10 that has been sunk by a drill drill (not shown) or the like. The inflatable resin injection holes 13 may be drilled in the central portion of the subsidence range 10a and the periphery thereof as in the first embodiment, or in the form of a matrix as in the second embodiment. Also good. In the present embodiment, as shown in FIG. 6A, the piercing position of the expandable resin injection hole 13 is the same as that of the first embodiment.

  Subsequently, as shown in FIG. 6 (d), the expansive resin 30 is injected from the injection gun 20 into the expansive resin injection hole 13 drilled in the interfloor floor 10, and the subsidence floor 10 is submerged. Make corrections. In addition, about the injection | pouring procedure of the expandable resin 30, the method similar to the method demonstrated in 1st Embodiment can be taken.

As described above, by using the subsidence floor correction method according to the fifth embodiment of the present invention, the above-described actions and effects can be obtained, and the entire floor can be prevented from being pushed up by the injection of the expandable resin 30. Thus, the subsidence of the floor 10 can be corrected. Moreover, when the underground beam 42 is not arranged under the dirt floor 10, the dirt floor 10 may be connected to an anchor bolt driven into the ground 11.
In addition, about the method of connecting with the earth floor 10 and the underground beam 42 or the ground 11, it can use together also in each embodiment mentioned above.

  Next, a sixth embodiment according to the present invention will be described with reference to FIGS. FIG. 7 is a cross-sectional view showing the bridge portion 52, the earthwork portion 51, and the connecting portion. FIG. 7A shows a state in which the gap 12 is formed below the floor plate 50 due to the ground subsidence. b) shows a state in which the expandable resin 30 is injected into the gap formed below the foot plate 50.

  As shown in FIG. 7 (a), a reinforced concrete foot plate 50, one end of which is supported by an abutment 54, is installed at the connection position between the earthwork portion 51 and the bridge portion 52. Pavement 53 is laid. And since the ground 11 sank, the space | gap 12 is formed under the tread plate 50 as shown in the figure. As described above, since the gap 12 is formed under the foot plate 50, the foot plate may be damaged due to the repeated load of the passing vehicle, or the generation of sound when the vehicle passes may be a problem. In order to solve such a problem, it is required to fill the gap 12 formed under the floor plate 50 with an injection material such as mortar. Under such circumstances, the construction method according to the sixth embodiment of the present invention can be applied.

  In order to inject the expandable resin 30 into the gap 12 formed below the floor plate 50, the expandable resin 30 is injected into the gap 12 in small portions from the injection gun 20 described above. In addition, when injecting the expandable resin 30, confirm the change in the height of the surface of the pavement 53 on the stepping plate 50 using a level, a measure, etc., and confirm that the height has increased by about 1 mm, for example. Then, the injection of the expandable resin 30 is stopped. As described above, when it is confirmed that the height of the surface of the pavement 53 has increased, it is determined that the tread plate 50 is supported by the expandable resin 30 that has expanded and solidified.

  As described above, by using the subsidence floor correction method according to the sixth embodiment of the present invention, the above-described operations and effects can be obtained, and the solidified inflatable resin 30 is responsible for the load on the tread plate 50. Can be confirmed. Therefore, the expandable resin 30 can be reliably injected into the gap 12, thereby solving problems such as the generation of sound during vehicle travel. Further, unlike the case of injecting an injection material such as mortar, it is not necessary to apply pressure to the injection material and inject it into the gap 12, so that the expandable resin 30 can be less likely to leak out of the gap 12.

  Next, a seventh embodiment according to the present invention will be described with reference to FIGS. FIG. 8 is a plan view showing an outline of the subsidence floor correction method according to the seventh embodiment of the present invention, and FIG. 9 shows the subsidence floor correction method according to the seventh embodiment of the present invention. It is a figure shown to (a)-(d)), and has shown sectional drawing of arrow IX-IX in FIG.

  FIG. 8 is a plan view of a corner angle of the solid base rising portion 60 formed in an L shape, and a horizontal member 62 is disposed on the rising portion 60 so as to bridge the opposing rising portion 60. ing. This solid foundation is a foundation that supports, for example, a wooden building on the ground. The horizontal member 62 is, for example, a square member, and supports the floor of the first floor portion and transmits the load of the upper structure to the rising portion 60 of the solid foundation. The rising portion 60 is made of reinforced concrete, and transmits the load of the building to the ground together with the bottom surface portion 61 of the solid foundation.

  As shown in FIG. 9 (a), the ground 11 sinks by h on the left side in the drawing, and the solid base rising portion 60 and the bottom surface portion 61 sink accordingly. Under such circumstances, the construction method according to the seventh embodiment of the present invention can be applied.

  First, as shown in FIG. 9B, a plurality of expandable resin injection holes 13 for injecting the expandable resin 30 are drilled into the bottom surface portion 61 that has been sunk using a drill drill (not shown) or the like. . An example of the arrangement of the expandable resin injection holes 13 is shown in FIG. As shown in the figure, six expandable resin injection holes 13 are formed radially from the corner of the rising portion 60.

  Next, as shown in FIG. 9B, a jack 63 is disposed at a predetermined position below the horizontal member 62, and the arranged jack 63 is operated to push up the horizontal member 62. An example of the arrangement of the jack 63 is shown in FIG. As shown in the figure, three jacks 63 are arranged in the vicinity of the corner of the rising portion 60.

  Subsequently, as shown in FIG. 9C, the expandable resin 30 is injected from the expandable resin injection hole 13 drilled in the bottom surface portion 61. For example, the expansive resin 30 is injected in the order of the expansive resin injection holes 13 indicated by arrows in FIG. 8, so that the expansive resin 30 is reliably filled between the ground 11 and the bottom surface portion 61. Can do.

  When the injection of the expandable resin 30 is completed and it is confirmed that the rising portion 60 and the bottom surface portion 61 have reached a predetermined height, the injection of the expandable resin 30 is stopped and the jack 63 is removed. Finally, as shown in FIG. 9 (d), the expansive resin injection hole 13 is filled with mortar or the like, and the subsidence floor correction method according to the seventh embodiment is completed.

Thus, by using the subsidence floor correction method according to the seventh embodiment of the present invention, the above-described operations and effects can be obtained, and the following effects can be obtained.
The jack 63 pushes up the horizontal member 62 and the jack 63 takes part of the load of the building, so that the load borne by the solid base rising portion 60 and the bottom surface portion 61 is reduced. Therefore, not only the bottom surface portion 61 but also the rising portion 60 can be easily corrected for settlement. In addition, since the load acting on the rising portion 60 with large load transmission to the ground 11 is directly received by the jack 63, the expansive resin 30 is not filled below the rising portion 60, and only the bottom surface portion 61 is lifted. Can be resolved.

  The present invention is not limited to the above-described embodiments, and various modifications and applications are possible. Of course, the arrangement of the expandable resin injection holes 13, the injection hole diameter, the injection order of the expandable resin 30, and the like can be freely set. In the second embodiment, the expansible resin injection holes 13 are described as being perforated in a matrix, but needless to say, it is not necessarily strictly perforated in a matrix. Further, in the subsidence floor correction method according to the seventh embodiment, the jack 63 supports the horizontal member 62 spanned over the rising portion 60. However, as long as the place can handle the load of the superstructure. The place where the jack 63 supports is not particularly limited.

BRIEF DESCRIPTION OF THE DRAWINGS The construction drawing of the subsidence floor correction construction method concerning a 1st embodiment of the present invention is shown, (a) is a top view of the subsidence floor 10, (b)-(e) is correction of a subsidence floor. Sectional drawing of arrow II of (a) which showed the construction method in construction order. The construction drawing of the subsidence floor correction construction method concerning a 2nd embodiment of the present invention is shown, (a) is a top view of the subsidence floor 10 which subsided, and (b)-(e) is correction of a subsidence floor. Sectional drawing of arrow II-II of (a) which showed the construction method in construction order. The construction drawing of the subsidence floor correction construction method concerning the 3rd embodiment of the present invention was shown, and (a)-(c) is a sectional view showing the subsidence floor correction construction method in order of construction. The application example of the correction method of the settlement floor concerning the 3rd Embodiment of this invention is shown, (a) is a top view of a concrete pavement plate, (b) is arrow IVb- in (a). Sectional drawing shown by IVb. The construction drawing of the subsidence floor correction construction method concerning the 4th embodiment of the present invention is shown, and (a)-(d) is a sectional view showing the subsidence floor correction construction method in order of construction. The construction drawing of the subsidence floor correction construction method concerning the 5th embodiment of the present invention is shown, (a) is a top view of the 1st floor part of a building, and (b)-(d) is correction of a subsidence floor. Sectional drawing of arrow IV-IV of (a) which showed the construction method in construction order. The construction drawing of the subsidence floor correction construction method concerning the 6th embodiment of the present invention is shown, and (a) and (b) are sectional views showing the connection part of a bridge part and an earthwork part. The top view which showed the outline | summary of the correction method of the settlement floor concerning the 7th Embodiment of this invention. It is the figure which showed the correction method of the settlement floor which concerns on the 7th Embodiment of this invention in construction order ((a)-(d)), and is sectional drawing of arrow IX-IX in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Soil floor 10a Subsidence range 11 Ground 12 Space | gap 13 Expansive resin injection hole 16 Heavy article 20 Injection gun 22 Injection pump 30 Expansive resin 40 Building 41 Column 42 Underground beam 43 Connecting device 50 Foot plate 60 Solid part rising part 61 Bottom of solid foundation 62 Horizontal material 63 Jack

Claims (11)

Drilling an inflatable resin injection hole in the center of the subsidence range of the floor constructed on the ground and around the center;
An inflatable resin is injected under the floor from the injection hole drilled in the central portion, the expandable resin is expanded to push up the floor around the central portion by a predetermined amount, and then sequentially injected into the periphery of the central portion. And a step of inflating the expansive resin from the hole under the floor and expanding the expansive resin to push up the floor around the center by a predetermined amount. A step of drilling inflatable resin injection holes in a substantially matrix form in the settlement area of the floor constructed on the ground;
The expansive resin is sequentially injected from the injection holes arranged in the corners of the substantially matrix shape into the injection holes drilled in the outer row, and the expansive resin is expanded to push up the floor around the injection holes in the outer row by a predetermined amount. And subsequently injecting inflatable resin sequentially for each row of adjacent injection holes, and expanding the expansive resin to push up the floor around the adjacent injection holes by a predetermined amount. Floor modification method. A step of drilling inflatable resin injection holes in a substantially matrix form in the settlement area of the floor constructed on the ground;
The inflatable resin is sequentially injected from the injection holes arranged in the corners of the approximately matrix shape into the injection holes drilled to the outside of the approximately matrix shape, and the expandable resin is expanded to surround the injection holes around the injection holes. The floor is pushed up by a predetermined amount, and subsequently inflatable resin is sequentially injected into the injection hole adjacent to the inside of the injection hole drilled on the outside, and the expansion resin is expanded to form a floor around the injection hole adjacent to the inside. And a step of pushing up a predetermined amount. In the joint portion where a step is generated in the adjacent floor due to ground subsidence, a step of drilling an inflatable resin injection hole in the vicinity of the joint portion of each of the adjacent floors;
Of the adjacent floors where the step has occurred, injecting an expandable resin under the floor from an injection hole drilled in a floor with a low height, and expanding the expandable resin to push up the floor with a low height by a predetermined amount, Subsequently, injecting an expandable resin under the floor from an injection hole perforated in a high floor, and expanding the expandable resin to push the high floor a predetermined amount, and
A method for correcting a subsidence floor, wherein the step is eliminated by pushing up a floor having a low height and a floor having a high height by an expansion force of the inflatable resin injected. In the adjacent floor where a gap is formed below the joint portion, a step of drilling an injecting hole for the expandable resin in each floor adjacent to the joint portion; and
Among the adjacent floors, the expansive resin is injected from the injection hole of the floor where the floor end is largely subsidized or the gap formed below the floor is large, and then the expandable resin is expanded. A step of inflating the expandable resin by injecting the expandable resin from the injection hole of the floor adjacent to the floor into which the expandable resin has been injected, and
A method for correcting a subsidence floor, wherein the floor is filled and supported by expansion of the injected expansive resin. A heavy object is placed on the floor constructed on the ground, and in the floor that has sunk centered on the place where the heavy object is placed, the floor expands in the vicinity of and around the place where the heavy object is placed. A step of drilling the injection hole of the functional resin,
The expansive resin is injected below the heavy load from the injection hole drilled in the vicinity of the placement position, and the expansive resin is expanded to push up the floor below the heavy load by a predetermined amount. A step of injecting an expandable resin from the injection hole perforated around the placement position, and expanding the expandable resin to push up the floor around the placement position of the heavy object by a predetermined amount. The subsidence floor correction method.   The subsidence floor correction method according to any one of claims 1 to 6, wherein the expandable resin is a foamable urethane resin. Further comprising the step of connecting the floor with underground beams or a coupling device fixed in the ground,
The subsidence floor correction method according to any one of claims 1 to 7, wherein the connecting device suppresses the floor from being pushed up as a whole when the expandable resin expands. Injecting expansive resin between the gap formed below the floor due to ground subsidence or between the floor and the ground, and the step of pushing up the floor by the expansive force of the expansive resin,
A subsidence floor correction method, wherein a change in height of the floor is monitored and injection of the expandable resin is stopped when the rise of the floor is detected. In the solid foundation that has subsided due to the subsidence of the ground, a step of drilling an injection hole of an expandable resin in the subsidence range of the bottom surface of the solid foundation;
Installing a support on the bottom surface, and allowing the support to receive a load of an upper structure acting on a solid foundation;
Injecting the expansive resin into the pouring hole, and expanding the expansive resin to push up the solid foundation in the subsidence range by a predetermined amount.   The subsidence floor correction method according to claim 10, wherein the support is a jack, and the jack supports a horizontal member spanned over the solid foundation.

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