JP4839004B2 - Injection material infusion method and injection material packer - Google Patents

Description

  The present invention relates to an osmotic injection method for improving a natural ground by injecting an injection material from the inside of a perforated pipe placed in a natural ground such as soft geology.

  Conventionally, a packer or injection cap is installed at the mouth of a perforated pipe inserted to a predetermined depth in a borehole formed in a natural ground, and an injection material is inserted into the perforated pipe on the bottom side of the hole from the packer or the injection cap. The injection material was infiltrated at once into the natural ground through all the holes of the perforated pipe. However, in this method, for example, in the excavation hole upward from the horizontal, the pressure on the hole side of the excavation hole is larger than the pressure on the bottom side of the excavation hole. There was a problem that the deviation of the improved region due to the injection material occurred in the length direction of the excavation hole. In addition, there is a problem that this tendency increases as the natural ground becomes softer.

  Therefore, a method has been proposed in which one excavation hole is divided into a predetermined length, and the injection amount or the like is changed in accordance with the spring water or the ground condition of the divided portion.

  For example, in Patent Document 1, a perforated pipe provided with a plurality of holes with check valves is installed in an excavation hole, and a single packer is inserted into the perforated pipe so as to be near the hole bottom side end of the perforated pipe. The injection material is pressed into the perforated pipe on the bottom side of the hole from the single packer, and a low-strength injection material with a short hardening time is injected into the ground through a hole with a check valve. Next, a method of secondary injection of a high-strength secondary injection material having a long curing time toward a natural ground is disclosed. In this method, the low-strength primary injection material with a short setting time flows to the mouth side of the perforated pipe body following the gap between the perforated pipe and the natural ground, and there is a weak layer in the natural ground in the process. If it does, it will flow to the outside of a perforated pipe along the part, it will permeate | transmit so that it may fill in a weak layer part, and it will be in the state stuffed into the weak layer part. In this state, a high strength secondary injection material having a long curing time is injected and cured to form a cylindrical improvement body on the outer periphery of the perforated tube. After the secondary injection material is cured, the single packer is moved to the hole opening side by a predetermined distance, and the primary injection material is injected again. That is, a series of steps consisting of a step of injecting the primary injection material, a step of injecting the secondary injection material, and a step of moving the single packer are repeated to form a cylindrical improvement body on the outer periphery of the perforated tube.

In addition, a perforated pipe with a plurality of holes with check valves is installed in the excavation hole, and a double lucker is inserted into the perforated pipe to expand the diameter near the bottom end of the perforated pipe. The injection material is press-fitted into the perforated pipe between the double packers, the injection material is injected into the ground through a hole with a check valve, and when the injection material is hardened, the double packer is moved to the hole side by a predetermined distance. A method of moving and filling the inside of the perforated tube with an injection material is performed. In this method, after a series of steps consisting of a step of injecting an injection material between double packers and a step of moving the double packer is repeated to form a cylindrical improvement body on the outer periphery of the perforated tube, Fill.
JP 2004-68473 A

  However, in the method described in Patent Document 1, the state where the single packer is installed must be maintained until the high-intensity secondary injection material having a long curing time is cured. There is a problem in that work efficiency is poor.

  In addition, when injecting the secondary injection material after injecting the primary injection material, in order to change the mixing ratio of the main material and the curing material, the change of the injection amount of each injection pump of the main material and the curing material and There is a problem that adjustment, adjustment work such as piping of main material and hardening material, etc. must be performed, and humans make these changes, adjustments, etc., and there are many work and complicated change that can not be made quickly .

  In the method of installing a double packer in the perforated pipe and press-fitting the injection material into the perforated pipe between the double packers, an injection material having a short curing time or an injection material having a high curing strength is provided from the inside of the perforated pipe between the double packers. When injected, a part of the injection material is hardened in the perforated tube, and there is a problem that it becomes difficult to move the packer on the bottom side of the hole.

  Moreover, in order to prevent the injection material from hardening in the perforated pipe between the double packers, if the step length of the injection section distance is shortened and the number of steps is increased, the injection work time required for one excavation hole is increased and the work efficiency is increased. There was a problem of getting worse.

  In addition, after forming a cylindrical improvement body on the outer periphery of the perforated pipe, it is necessary to remove the double packer from the borehole and fill the perforated pipe, which increases the amount of material replacement work and time. There was a problem of requiring.

Therefore, the present invention has been made in view of the above problems, and its purpose is to arbitrarily set the injection step length and the number of times according to the ground condition of the natural ground, from natural ground improvement to filling in the pipe. possible continuous infusion of, and in a short time can be reliably natural ground improvement such Note needful packer is to provide a penetration grouting method of injection material using the Re Narabiniko.

In order to achieve the above object, the infusion method for injecting material according to the present invention includes a packer installed in a perforated tube inserted to a predetermined depth in a drilling hole formed in a natural ground, and a hole is formed more than the packer. A permeation injection method in which an injection material is press-fitted into the perforated pipe on the bottom side and permeated into the natural ground through the hole of the perforated pipe, and the step of inserting the perforated pipe into the excavation hole; The step of inserting the packer into the perforated pipe and installing it at a predetermined position, and press-fitting the permeation compound injection material into the perforated pipe on the bottom side of the hole with respect to the packer and injecting into the ground through the hole Filling the perforated tube on the bottom side of the hole with respect to the packer after injecting the osmotic compounded infusate, and filling the perforated tube on the bottom side of the packer, Immediately after curing the compounded injection material, the process of moving the packer to the hole side Characterized by (first invention).

  According to a second invention, in the first invention, a series of steps consisting of a step of injecting the osmotic compounding injection material, a step of injecting the rapid-hardening compounding injection material, and a step of moving the packer are repeated. Features.

According to a third invention, in the first or second invention, the packer includes a main material pipe that feeds a main material, a hard material pipe that feeds a hard material, the main material pipe, and the It has a bag-like inflatable body that is disposed on the outer peripheral side of the hardener tube and can be expanded and contracted by working fluid pressure, and has a hollow conical shape with the tip cut off, and the end on the expansion side is the expansion body. An end cover made of an elastic body, which is connected to one end, and is disposed so that the end on the narrow closed side surrounds the end of the main material pipe and the hardener pipe, and the inner side of the end cover The main material and the hardened material are mixed together.

  A fourth invention is the cement-based injection material according to any one of the first to third inventions, wherein the osmotic compounding injection material and the rapid-hardening compounding injection material are obtained by mixing a main material of a cement material and a hardener. In accordance with the desired strength and curing time, the blending ratio control system capable of adjusting the blending ratio of the main material and the curing material is controlled, the penetration blending injection material and the rapid-hardening blending injection material, Is characterized by being continuously injected.

According to a fifth invention, in the first invention, the perforated tube is provided with only the hole from the end of one end to a predetermined length position in the longitudinal direction, and the other end from the position of the predetermined length. A hole with a check valve is provided up to the end of the hole, and the drilled hole is inserted into the drilling hole while drilling or after drilling so that the one end of the perforated pipe is on the bottom side of the hole , the packer is installed in the perforated tube so as to close the most hole bottom of the check valve with holes, characterized in Rukoto.

The packer for injecting material according to the sixth aspect of the present invention is inserted into an excavation hole formed in a natural ground, and used in an infiltration injection method for infiltrating the injectable material into the natural ground through a hole provided in an outer peripheral portion. A main material pipe that feeds the main material, a hard material pipe that feeds the hardened material, and an outer peripheral side of the main material pipe and the hardener pipe. It has a bag-like inflatable body that can be inflated and contracted by fluid pressure, a hollow conical shape with the tip cut off, an end on the expanding side is connected to one end of the inflating body, and an end on the narrowly closed side is said It is provided with the front-end | cover cover which consists of an elastic body arrange | positioned so that the edge part of the main material pipe | tube and the said hardening | curing material pipe | tube may be enclosed.

  According to the osmotic injection method of the injection material according to the present invention, the injection material can be moved immediately after pressing the rapid-hardening compounding injection material with a short hardening time into the perforated pipe on the bottom side of the packer. The injection work time is shortened. In addition, since the rapid-hardening compounding injection material can be continuously injected into the perforated pipe after the infiltration compounding injection material is press-fitted, work such as pipe refilling becomes unnecessary, and the construction efficiency is greatly improved. To do.

  In order to mix the main material and the hardening material in the perforated pipe just before being injected into the natural ground by the injection material injection packer, an injection material having a short hardening time can be used. In addition, since the tip cover of the injection packer is made of an elastic material, even if the injection material hardens inside the tip cover, when the injection material is injected again, the tip portion of the tip cover expands, and the injection is cured. The material can be discharged.

  Also, in a series of steps consisting of a step of press-fitting an infusion blended injection material, a step of press-fitting a rapid-hardening blended injection material, and a step of moving the packer, the curing time can be increased by using a packer for injecting the injection material. In addition, since it is difficult to be influenced by the hardening strength, the length of the injection step and the number of injections can be appropriately changed according to the situation of the natural ground.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of an injection material blending amount control system, an injection hole tube and an injection packer, and an injection material infiltration method according to the present invention will be described below in detail with reference to the drawings. For the convenience of understanding the invention, in this embodiment, a method for improving a natural ground from the face to the front of the face at the time of tunnel excavation will be described. However, the application target of the present invention is not limited to tunnel excavation work. However, it can be widely applied to general construction to improve natural ground.

  FIG. 1 is a view showing an injection state of an injection material according to the present embodiment. As shown in FIG. 1, an excavation hole 10 for injecting an injection material along the outer periphery of the face of the tunnel is excavated obliquely upward toward a natural ground 12 by a drilling machine such as a drill jumbo 20 and the excavation hole. The perforated tube 14 for injection is inserted into the inside 10. Then, an injection packer 16 is installed in the injection holed tube 14, and an injection material is injected between the injection packer 16 and the hole bottom 18 of the excavation hole 10 to improve the natural ground 12.

  Below, the process of the osmotic injection method of the injection material which concerns on this embodiment is shown.

  FIG. 2 is a view showing a perforated tube for injection according to the present embodiment. As shown in FIG. 2, the injection perforated tube 14 is provided with a hole 22 from the end of one end to a predetermined length position in the longitudinal direction, and from the position of the predetermined length to the end of the other end. A hole 24 with a check valve is provided. The check valve of the hole 24 with the check valve opens the hole by moving the valve body to the outside of the perforated pipe 14 for injection when a predetermined pressure is applied from the inside of the perforated pipe 14 for injection. With respect to the pressure from the natural ground side, the valve body is configured to be in close contact with the hole and not to open the hole.

  FIG. 3 is a view showing a state in which a perforated pipe for injection is inserted into the excavation hole according to the present embodiment. As shown in FIG. 3, the perforated pipe 14 for injection is inserted into the excavation hole 10 formed in the natural ground 12 to a predetermined depth. And it inserts in the excavation hole 10 so that the end of the injection | pouring holed tube 14 may become the hole bottom 18 side, and the outflow of an injection material is prevented in the opening | mouth part of the clearance gap between the holed tube 14 for injection | pouring and the digging hole 10. The caulking 26 is performed.

  FIG. 4 shows a state in which an injection packer is installed in the injection hole tube, and FIG. 5 is a diagram showing a configuration of this injection packer. As shown in FIG. 4, the injection packer 16 is inserted into the injection hole tube 14. As shown in FIG. 5, the injection packer 16 includes a main material pipe 27 that feeds the main material, a hardening material pipe 28 that feeds the hardening material, a main material pipe 27, and a hardening material pipe 28. A bag-like inflatable body 30 that can be expanded and contracted by working fluid pressure, and a hollow conical shape with the tip cut off, with an end on the expanding side at one end of the inflatable body 30 And a distal end cover 32 that is connected and disposed so that the end on the narrow closed side surrounds the ends of the main material tube 27 and the hard material tube 28. The main material and the curing material are mixed inside the tip cover 32. The material of the tip cover 32 is an elastic body such as rubber. Even if the injection material is left inside the tip cover 32 and hardened, the tip cover 32 expands when the injection material is injected again, and the injected injection material is hardened. And a new injection material are discharged.

  The injecting packer 16 is inflated by press-fitting a fluid such as nitrogen or water into the expanding body 30, and the expanding body 30 portion is located closest to the hole bottom 18 side of the hole 24 with a check valve of the perforated pipe 14 for injection. It is installed so as to close the hole 24 with a check valve.

  FIG. 6 is a view showing a state in which the osmotic blended injection material is injected into the natural ground in the first step in the osmotic injection method of the present embodiment. As shown in FIG. 6, the osmotic blended injection material 34 is press-fitted into the perforated pipe 14 on the hole bottom 18 side of the injection packer 16 and is injected into the natural ground 12 through the hole 22. At that time, the permeation mixed injection material 34 a that has entered between the injection porous tube 14 and the ground 12 by the check valve of the check valve-provided hole 24 flows into the injection porous tube 14. Is prevented. The osmotic compounding injecting material 34 is a cement-based injecting material obtained by compounding a main material that is an ultra-fine particle cement and a hardening material, and the mixing ratio of the main material and the hardening material is set according to the desired strength and setting time. It is controlled and injected by an adjustable amount control system 36 (described later). The curing time of the osmotic compounding injection material 34 is set to, for example, about 15 to 30 minutes. In addition, in this embodiment, although the hardening time of the osmosis | permeation mixing | blending injection material 34 was 15-30 minutes, it is not limited to this, It can change suitably according to the condition of the natural ground 12.

  When a predetermined amount of the osmotic blended injection material 34 is injected, a cylindrical improvement body 64 is formed on the ground 12 on the outer periphery of the perforated pipe 14 for injection.

FIG. 7 is a schematic view showing an injection material blending amount control system used in this embodiment. As shown in FIG. 7, the blending amount control system 36 for blending the main material and the curing material includes a mixer 42 as a first mixing device for mixing the main material 38 and kneaded water 60 (described later), and curing. A stirrer 43 as a second mixing device that mixes the material 39 and the water 40 and a first water pump that supplies the water 40 to adjust the concentration of the main material 38 fed from the mixer 42 A main material concentration adjusting water pump 44, and a hardening material concentration adjusting water pump 45 as a second water pump for supplying water 40 to adjust the concentration of the hardening material 39 fed from the stirrer 43 with water 40; The main material injection pump 46 as a first injection pump for feeding the main material obtained by mixing the main material 38 with the water 40 into the excavation hole 10 and the hardening material 39 are mixed with the water 40. As a second injection pump for feeding the hardener into the borehole 10 The first feed for feeding the main material from the mixer 42 to the main material pipe 27 of the injection packer 16 via the main material infusion pump 46 and the main material infusion pump 46. The hardener is fed from the stirrer 43 to the hardener pipe 28 of the injection packer 16 through the main pipe feed pipe 50 as a feed pipe, the hardener feed pump 47 and the hardener injection pump 48. A main material as a first measuring device that is provided in the middle of the hardening material supply pipe 51 and the main material supply pipe 50 as the second supply pipe to measure the injection amount and injection pressure of the main material. The material flow meter 52, the main material pressure meter 53, and the hard material flow meter as a second measuring device that is provided in the middle of the hard material feed pipe 51 and measures the injection amount and the injection pressure of the hard material. 54 and the curing material pressure gauge 55 and the curing material feed pump 47 to the curing material injection pump 4. A flow meter for pump 56 for measuring the feed amount up to and an input unit 57 for humans to input the mixing ratio of the main material and the hardener, and the mixing ratio and main material input to this input unit 57 Based on the flow meter 52, main material pressure gauge 53, hardener flow meter 54, hardener pressure gauge 55, and pump flowmeter 56, main material concentration adjustment water pump 44, hardener concentration adjustment And a controller 58 for controlling the supply amounts of the water pump 45, the main material injection pump 46, the hardener feed pump 47, and the hardener injection pump 48. Further, in order to prevent agglomeration of the ultrafine cement, a kneading water 60 for mixing the dispersing agent and water and a kneading water supply pump 62 for feeding the kneading water 60 to the mixer 42 are provided. The controller 58 controls the supply amount of the kneading water supply pump 62 based on the blending ratio. In order to adjust the curing time, an admixture (not shown) may be added to the curing material fed from the curing material feed pump 47.
When the osmotic compounding injection material 34 is injected into the natural ground 12, the mixing ratio of the main material and the curing material that satisfies the desired strength and curing time is input to the input unit 57. The controller 58 controls the main material injection pump 46 and the hardener injection pump 48 so that the blending ratio input to the input unit 57 is obtained.

  During the injection of the osmotic blended injection material 34, the injection amount and injection pressure of the injection material and the curing material are injected by the main material flow meter 52, the main material pressure meter 53, the curing material flow meter 54, and the curing material pressure gauge 55. Is constantly measured, and based on these measurement results, the control device 58 controls the main material injection pump 46 and the hardening material injection pump 48 to adjust the mixture ratio to a predetermined ratio. The main material concentration adjusting water pump 44 and the hardening material concentration adjusting water pump 45 constantly measure the amount of water supplied, and the pump flow meter 56 always measures the amount of hardening material supplied. Based on these measurement results, The control device 58 controls the main material concentration adjusting water pump 44, the hardening material concentration adjusting water pump 45, and the hardening material feeding pump 47 so that the concentration of the main material and the hardening material suitable for the osmotic compounding injection material 34 is obtained. adjust. The main material injection pump 46, the hardening material injection pump 48, the main material concentration adjusting water pump 44, and the hardening material concentration adjusting water pump 45 are, for example, inverter control, mechanical rotation speed control, etc. in order to ensure the accuracy of the flow rate. Use a pump with the following functions.

  FIG. 8 is a diagram showing a state in which the rapid-hardening compounded injection material is filled in the perforated pipe for injection in the first step in the osmotic injection method of the present embodiment. As shown in FIG. 8, after injecting the osmotic compounding injecting material 34, the rapid-hardening compounding material 66 having a shorter curing time than the osmotic compounding injecting material 34 is injected into the perforated pipe for injection on the hole bottom 18 side of the injecting packer 16. 14 is filled. In the case of using the rapid-hardening compounding injection material 66 having a short curing time, the rapid-hardening compounding injection material 66 must be injected at a higher pressure, and the main material injection pump 46 and the hardening material injection pump 48 are injected. It is necessary to change settings such as volume and injection pressure. The hardening time of the rapid-hardening compounding material 66 is set to about 30 seconds to 1 minute, for example. In addition, in this embodiment, although the hardening time of the rapid-hardening mixing | blending injection material 66 was 30 second-1 minute, it is not limited to this and can change suitably.

  When the blending ratio of the rapid-hardening blending injection material 66 is input to the input unit 57 of the blending amount control system 36, the control device 58 immediately controls the main material injection pump 46 and the curing material injection pump 48, and the rapid-hardening blending injection material. The blending ratio is adjusted to 66. Further, the control device 58 automatically controls the main material concentration adjusting water pump 44, the hardening material concentration adjusting water pump 45, and the hardening material feeding pump 47, respectively. Adjust to the density of the material. Accordingly, it is possible to continuously inject the rapid-hardening compound injection material 66 after injecting the permeation compound injection material 34.

  During the injection of the rapid-hardening compounding injection material 66, as described above, the injection amount and the injection pressure of the injection material and the hardening material are constantly measured, and the control device 58 determines the main material injection pump 46 and the hardening based on the measurement result. The material injection pump 48 is controlled to be adjusted so as to have a predetermined mixing ratio, and to be adjusted so as to have a concentration of a main material and a hardening material suitable for the rapid hardening compounded injection material 66.

  In this embodiment, a method of inputting the blending ratios of the penetration blending injection material 34 and the rapid hardening blending injection material 66 into the input unit 57 when the penetration blending injection material 34 and the rapid hardening blending injection material 66 are poured. However, the present invention is not limited to this. When the osmotic compounded injection material 34 is injected, the compounding ratio and the injection amount of the osmotic compounded injection material 34 and the compounding ratio and the injection amount of the rapid-hardening compounded injection material 66 Is input to the input unit 57 in advance, so that the input unit 57 is not operated at all from the injection of the osmotic compounding injection material 34 to the end of the injection of the rapid-hardening compounding injection material 66, that is, a predetermined amount of the osmotic compounding injection material 34 When the injection is performed, the control device 58 automatically controls the main material injection pump 46 and the hardening material injection pump 48 to adjust the mixing ratio of the rapid hardening compounding injection material 66, and immediately, the rapid hardening compounding injection material 66. Continuously It is also possible to amount injected.

  Since this blending amount control system 36 is adjusted based on the measurement results of the measuring device that measures the injection amount and the injection pressure of the main material and the curing material, it maintains the blending ratio of the main material and the curing material with high accuracy. Can do. In addition, since the feed amount of the main material and the hardener is changed instantaneously simply by inputting the blending ratio of the main material and the hardener to the input unit 57, it continuously continues after the osmotic mixture injection material 34 is injected. Thus, the rapid-hardening compounding material 66 can be injected. Furthermore, even when the natural ground 12 conditions change suddenly, the blending amount can be changed instantaneously and with high accuracy, and effective injection can be performed.

  FIG. 9 is a view showing a state in which the injection packer is moved to the hole opening side in the first step in the osmotic injection method of the present embodiment. As shown in FIG. 9, immediately after the hardened compounding injection material 66 is cured, the pressure of the expansion body 30 of the injection packer 16 is released, moved to the hole side, and installed at a predetermined position. The moving distance to the hole opening side is set to about 0.5 to 1 m, for example. In addition, in this embodiment, although the moving distance of the injection | pouring packer 16 was 0.5-1 m, it is not limited to this, It can change suitably according to the condition of the natural ground 12.

  A series of steps consisting of a step of press-fitting the osmotic blended injection material 34, a step of press-fitting the rapid-hardening blended injection material 66, and a step of moving the injection packer 16 are repeated until the improved body 64 reaches the hole.

  FIG. 10 is a diagram showing a state in which the osmotic blended injection material is injected into the natural ground in the second step in the osmotic injection method of the present embodiment. As shown in FIG. 10, the osmotic blended injection material 34 is used for injection between the injection packer 16 and the rapid-hardening compounded injection material 66 filled and cured in the perforated tube 14 for injection in the first step. It is press-fitted into the hole tube 14, opens the hole 24 with a check valve, is filled between the perforated tube 14 for injection and the ground 12 in the first step, and has not yet reached a predetermined strength. It is injected into the natural ground 12 while destroying the injection material 34a. When a predetermined amount of the osmotic blended injection material 34 is injected, a cylindrical improvement body 64 is formed on the ground 12 on the outer periphery of the perforated pipe 14 for injection.

  FIG. 11 is a view showing a state in which the rapid-hardening compound injection material is filled in the perforated pipe for injection in the second step in the osmotic injection method according to the present embodiment. As shown in FIG. 11, after injecting the infiltration compound 34 in the second step, the rapid-injection compound material 66 is filled into the injecting porous tube 14 and the injecting porous tube 14 in the first step and cured. It fills in the perforated pipe 14 for injection between the rapid-hardening compounded injection material 66.

  FIG. 12 is a diagram showing a state where the periphery of the excavation hole according to the present embodiment is improved. As shown in FIG. 12, when a series of steps are repeated, a cylindrical improvement body 64 is formed on the outer periphery of the excavation hole 10, and when the improvement body 64 reaches the hole opening, the permeation injection operation is finished.

  For example, when such improved bodies 64 are formed on the face of a tunnel, a plurality of the improved bodies 64 are installed adjacent to each other in the ground 12 along the outer periphery of the face.

  In the present embodiment, a method is shown in which a series of steps consisting of a step of press-fitting the penetrating compound injection material 34, a step of press-fitting the quick-hardening compound injection material 66, and a step of moving the injection packer 16 is repeated twice. However, the number of steps is not limited to this, and the number of steps can be appropriately changed according to the situation of the natural ground 12.

  According to this osmotic injection method, a rapid-mixing injection material 66 having a short curing time is pressed into the injection holed tube 14 closer to the hole bottom 18 than the injection packer 16, and immediately after the injection, for injection. Since the packer 16 can be moved, the injection time of the injection material can be shortened. In addition, after the osmotic compounding injection material 34 is press-fitted into the injection holed tube 14 on the hole bottom 18 side of the injection packer 16, the rapid hardening compounding injection material 66 is continuously pressed into the injection holed tube 14. Therefore, setup such as refilling of piping becomes unnecessary, and construction efficiency can be greatly improved.

It is a figure which shows the injection | pouring condition of the injection material which concerns on this embodiment. It is a figure showing a perforated tube for injection concerning this embodiment. It is a figure which shows the state which inserted the perforated pipe | tube for injection in the excavation hole which concerns on this embodiment. It is a figure which shows the state which installed the packer for injection in the perforated pipe for injection. It is a figure which shows the structure of the packer for injection | pouring. It is a figure which shows the state which inject | poured the penetration mixing | blending injection material into the natural ground in the 1st step in the osmosis | permeation injection construction method of this embodiment. It is the schematic which shows the compounding quantity control system of the injection material used by this embodiment. It is a figure which shows the state which filled the rapid-hardening mixing | blending injection material in the porous tube for injection | pouring in the 1st step in the osmotic injection construction method of this embodiment. It is a figure which shows the state which moved the injection | pouring packer to the hole opening side in the 1st step in the osmotic injection construction method of this embodiment. It is a figure which shows the state which inject | poured the penetration mixing | blending injection material into the natural ground in the 2nd step in the osmosis | permeation injection construction method of this embodiment. It is a figure which shows the state which filled the rapid-hardening mixing | blending injection material in the porous tube for injection | pouring in the 2nd step in the osmotic injection construction method of this embodiment. It is a figure which shows the state which improved the circumference | surroundings of the excavation hole which concerns on this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Excavation hole 12 Ground 14 Perforated pipe for injection 16 Packer for injection 18 Bottom of hole 20 Drill jumbo 22 Hole 24 Hole with check valve 26 Caulking 27 Main material pipe 28 Curing material pipe 30 Expansion body 32 Tip cover 34 Penetration Compounding injection material 36 Compounding amount control system 38 Main material 39 Curing material 40 Water 42 Mixer 43 Stirrer 44 Main material concentration adjusting water pump 45 Curing material concentration adjusting water pump 46 Main material injection pump 47 Curing material feeding pump 48 Curing Material injection pump 50 Main material feed pipe 51 Cured material feed pipe 52 Main material flow meter 53 Main material pressure gauge 54 Cured material flow meter 55 Cured material pressure meter 56 Pump flow meter 57 Input section 58 Control Device 60 Kneading Water 62 Kneading Water Supply Pump 64 Improved Body 66 Quick Hard Compounding Injection Material

Claims (6)

A packer is installed inside a perforated pipe inserted to a predetermined depth in a borehole formed in a natural ground, and an injection material is press-fitted into the perforated pipe on the bottom side of the hole from the packer. It is an osmotic injection method that penetrates into the natural mountain through the hole of
Inserting the perforated pipe into the excavation hole;
Inserting the packer into the perforated tube and placing it in place;
A step of press-fitting an infiltration blended injection material into the perforated pipe on the bottom side of the packer and injecting it into the natural ground through the hole;
Filling the perforated tube with a rapid hardening compound injection material having a shorter curing time than the penetration compound injection material into the perforated tube on the bottom side of the packer after injecting the penetration compound injection material;
And a step of immediately moving the packer to the hole opening side after curing of the rapid-hardening compounded injection material.   2. The injection material according to claim 1, wherein a series of steps consisting of a step of injecting the osmotic compounding injection material, a step of injecting the rapid-hardening compounding injection material, and a step of moving the packer are repeated. Penetration injection method. The packer has a main material pipe for feeding the main material,
A hardener tube for feeding the hardener,
A bag-like inflatable body disposed on the outer peripheral side of the main material pipe and the hardener pipe and capable of being inflated and contracted by a working fluid pressure;
It has a hollow conical shape with the tip cut off, the end on the expansion side is connected to one end of the expansion body, and the end on the narrow side is the end of the main material pipe and the hardening material pipe The injection according to claim 1, further comprising: a tip cover made of an elastic body disposed so as to surround, wherein the main material and the hardener are mixed inside the tip cover. Material infusion method.   The osmotic compounding injection material and the rapid-hardening compounding injection material are cement-based injection materials obtained by compounding a main material of a cement-based material and a curing material, and depending on desired strength and curing time, the main material and The blending ratio control system capable of adjusting the blending ratio with the curing material is controlled, and the infiltration blending injection material and the rapid hardening blending injection material are continuously injected. An infusion method for injecting material as described in 1. In the perforated pipe, only the hole is provided from the end of one end to a predetermined length position in the longitudinal direction, and a hole with a check valve is provided from the predetermined length to the end of the other end. Inserted into the excavation hole while excavating or excavating the excavation hole so that the one end of the perforated pipe is located on the bottom side of the hole. permeation grouting injection material according to claim 1 which is installed in the perforated tube so as to close the attached hole and said Rukoto. It is a packer that is inserted into an excavation hole formed in a natural ground and is used in an infiltration injection method for infiltrating an injection material into the natural ground via a hole provided in the outer periphery,
A main material pipe for supplying the main material;
A hardener tube for feeding the hardener,
A bag-like inflatable body disposed on the outer peripheral side of the main material pipe and the hardener pipe and capable of being inflated and contracted by a working fluid pressure;
It has a hollow conical shape with the tip cut off, the end on the expansion side is connected to one end of the expansion body, and the end on the narrow side is the end of the main material pipe and the hardening material pipe An injecting packer for injecting material, comprising: a tip cover made of an elastic body, which is disposed so as to surround.