JP4896949B2 - Correction method of subsidence floor - Google Patents

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 includes an inflatable resin injection hole in a central part of a floor subsidence range constructed on the ground and around the central part. a step of perforating the said central portion of expandable resin is injected from the drilled injection hole under the floor in a first push-up process Ru lifting the floor of the central portion by inflating the expandable resin, before from the injection holes drilled around the serial central portion, the expandable resin is injected sequentially under the floor, and a second push-up step of raising press bed around the central portion by inflating the expandable resin, a plurality of injection Injecting expansive resin from the hole under the floor, inflating the expansive resin, and pushing up the floor in the subsidence range so that the height of the surface reaches the final target level; It is characterized by providing.
The height of the surface of the center floor pushed up in the first pushing-up step is a first level that is lower than the final target level, and the second pushing-up is performed. The surface height of the floor around the center portion pushed up in the raising step may be a second level that is lower than the final target level.
The first level may be lower by about 20 mm than the final target level, and the second level may be lower by about 10 mm than the final target level.

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. Among the injection holes arranged in a substantially matrix shape , the inflatable resin is sequentially injected from the injection holes arranged in the corners into the injection holes drilled in the outer row, and the expansive resin is expanded to expand the outer rows. injection hole near the floor lifting, followed by injecting sequentially expandable resin in each column of the adjacent injection hole, the injection hole near to the adjacent inflating the expandable resin bed pushed up first A step of pushing up, injecting an expandable resin under the floor from the plurality of injection holes, expanding the expandable resin, and pushing up the floor in the subsidence range so that the surface height reaches a final target level; A second pushing-up step .

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. When, among the injection holes arranged in the substantially matrix, sequentially expandable resin is injected into the injection holes drilled in the injection hole or al outer side arranged at corners, in the outer inflating the expandable resin The floor around the perforated injection hole is pushed up , and subsequently inflatable resin is sequentially injected into the injection hole adjacent to the inside of the injection hole perforated on the outside, and the expansion resin is expanded to inject the injection adjacent to the inside. a first push-up steps gel bed around hole pushed, the expandable resin is injected from a plurality of the injection holes under the floor, by expanding the expandable resin, the height of the surface and the final target level wherein the subsidence range of floor comprises a second push-up steps gel pushed, the so And features.

In order to achieve the above object, the subsidence floor correction method according to the fourth aspect of the present invention is the floor in which a heavy object is placed on the floor and submerged around the placement position of the heavy object. In the correction method , a step of drilling an inflatable resin injection hole in the vicinity of and around the mounting position of the heavy object on the floor, and a lower part of the heavy object from the injection hole drilled in the vicinity of the mounting position. Injecting expansive resin into the resin, inflating the expansive resin to push up the floor under the heavy object, and then injecting the expansive resin from the injection hole perforated around the position where the heavy object is placed A first lifting step of expanding the expandable resin to push up the floor around the loading position of the heavy object , and injecting the expandable resin under the floor from the plurality of injection holes, Resin is expanded and the floor is pushed up so that the surface height is at the final target level. Characterized in that it comprises pushing the up step, the.
The height of the floor pushed up in the first pushing-up step may be a level that is about 10 mm lower than the final target level.

  The expandable resin may be a foamable urethane resin.

Further, the method further includes a step of connecting the floor to an underground beam arranged under the floor or a connecting device fixed in the ground, and when the expandable resin is expanded by connection with the underground beam or the connecting device. The floor may be prevented from being pushed up entirely.

  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 ends within 5 minutes, the strength of about 90% is obtained within 15 minutes, the solidification takes about 30 minutes, and after 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: the volume of the second material is 1: 1 to 1 according to 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. 7A, a reinforced concrete foot plate 50 supported at one end by an abutment 54 is installed at a 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 footboard 50 as shown to a 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 (9)

Drilling a hole for inflatable resin in the central part of the floor subsidence area constructed on the ground and around the central part;
The expandable resin is injected under the floor from the injection holes drilled in the central portion, a first push-up process Ru lifting the floor of the central portion by inflating the expandable resin,
From the injection holes drilled around the front Symbol central, expandable resin is injected sequentially under the floor, and a second push-up step of raising press bed around the central portion by inflating the expandable resin,
A third lifting step of injecting an inflatable resin under the floor from a plurality of injection holes, inflating the inflatable resin, and pushing up the floor in the subsidence range so that the surface height reaches a final target level; And a subsidence floor correction method characterized by comprising:   The surface height of the center floor after being pushed up in the first raising step is a first level that is lower than the final target level,
  The surface height of the floor around the center portion pushed up in the second pushing-up step is a second level that is lower than the final target level. The subsidence floor correction method according to claim 1.   The first level is about 20 mm lower than the final target level,
  The subsidence floor correction method according to claim 2, wherein the second level is lower by about 10 mm than the final target level. A step of drilling inflatable resin injection holes in a substantially matrix form in the settlement area of the floor constructed on the ground;
Out of the injection holes arranged in a substantially matrix shape , the inflatable resin is sequentially injected into the injection holes drilled in the outer row from the injection holes arranged in the corners, and the inflatable resin is expanded to inject the injection holes in the outer row. the floor near the push-up, followed by injecting sequentially expandable resin in each column of the adjacent injection hole, a first push-up pushes up the floor around the injection hole to the adjacent inflating the expandable resin Process,
A second push-up that injects an expandable resin under the floor from a plurality of the injection holes, expands the expandable resin, and pushes up the floor in the subsidence range so that the surface height reaches the final target level. A subsidence floor correction method characterized by comprising: a process . A step of drilling inflatable resin injection holes in a substantially matrix form in the settlement area of the floor constructed on the ground;
Of the injection holes arranged in the substantially matrix, sequentially expandable resin is injected into the injection holes drilled in the injection hole or al outer side arranged at the corners, drilled into the outer inflating the expandable resin The floor around the injection hole is pushed up , and subsequently the 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 surround the injection hole adjacent to the inside A first lifting step of pushing up the floor of
A second push-up that injects an expandable resin under the floor from a plurality of the injection holes, expands the expandable resin, and pushes up the floor in the subsidence range so that the surface height reaches the final target level. A subsidence floor correction method characterized by comprising: a process . In the method of correcting the floor, in which a heavy object is placed on the floor and sunk around the place where the heavy object is placed,
Drilling an inflatable resin injection hole in the vicinity of and around the mounting position of the heavy object on the floor;
The expansive resin is injected below the heavy load from the injection hole drilled in the vicinity of the placement position, the expansive resin is expanded to push up the floor below the heavy load, and then the heavy load is loaded. A first lifting step of injecting an expandable resin from the injection hole perforated around the vicinity of the placement position, and expanding the expandable resin to push up the floor around the placement position of the heavy object;
Injecting an expandable resin under the floor from the plurality of injection holes, expanding the expandable resin, and pushing up the floor so that the height of the surface reaches the final target level; and A subsidence floor correction method characterized by comprising:   The settlement according to any one of claims 4 to 6, wherein the height of the floor pushed up in the first pushing-up step is a level that is about 10 mm lower than the final target level. Floor modification method. The subsidence floor correction method according to any one of claims 1 to 7 , wherein the expandable resin is a foamable urethane resin. Further comprising the step of connecting the floor with an underground beam arranged under the floor or a connecting device fixed in the ground,
The connection between the ground beam or said connecting device, wherein upon expansion of the expandable resin, according to any one of claims 1 to 8 wherein the floor is characterized by inhibiting the push-up is that the entire Remediation method for subsidence floor.

Images