Grout injection method and grout injection device

Abstract

To provide a grouting material charging method and a grouting material charging device for suppressing dust scattering around during grouting material charging work.SOLUTION: Provided is a grouting material charging method for charging a grouting material G into a mixer 7, including a bag hanging step of suspending a material bag 17 into a material charging part 11 of the mixer 7 in which a hanging wire 37 for hanging the material bag 17 containing the grouting material G is inserted through a recovery package body 33, a bag destruction step of destroying the material bag 17 in the material charging part 11 and discharging the grouting material, and a bag recovery step of sealing at least the destroyed part 17a of a wreckage 18 of the material bag 17, which has been destroyed in the bag destruction step, in the recovery package body 33, and lifting the wreckage 18 from the material charging part 11 with the hanging wire 37.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a grout injection method and a grout injection device. [Background technology]

[0002] A conventional material mixing device described in Patent Document 1 is known as a technology in this field. This device is equipped with a storage tank for storing dry mix material, and the storage tank has a material receiving port that opens upward. A material supply bag containing the dry mix material is hung by a crane, moved above the material receiving port of the storage tank, and the bottom of the material supply bag is opened to charge the dry mix material into the storage tank. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-269558 A Summary of the Invention [Problem to be solved by the invention]

[0004] In this type of material injection method, dust may leak when the material is injected, or dust remaining in the bag may scatter around when the empty material supply bag is lifted by a crane after the material is injected, which may deteriorate the working environment. The object of the present invention is to provide a grout injection method and grout injection device that suppresses dust from scattering around during material injection work. [Means for solving the problem]

[0005] The grout material injection method of the present invention is a grout material injection method for injecting grout material into a mixer, and includes a bag introduction process in which a material bag containing grout material is hoisted into the material input section of the mixer with a hoisting material for suspending the material bag through a recovery packaging body, a bag destruction process in which the material bag is destroyed within the material input section to eject the grout material, and a bag recovery process in which at least the destroyed portion of the remains of the material bag destroyed in the bag destruction process is enclosed in the recovery packaging body and the remains are hoisted from the material input section by the hoisting material and recovered.

[0006] In the bag introduction process, a lid member that functions as a lid for the inlet of the material bag in the material input section is installed above the material bag with a hanging material inserted through an insertion hole formed in the lid member, and the lid member covers the inlet when the material bag is hung into the material input section, and in the bag recovery process, the lid member is lifted up following the debris via a lid member hanging material connected to the lid member separately from the hanging material.

[0007] The material input section is provided with an opening / closing lid section that can open and close the inlet of the material bag, and in the bag introduction process, the material bag is hung in the material input section with the opening / closing lid section open, and then the opening / closing lid section is closed with a hanging material extending upward from the material bag being inserted through it.

[0008] The recovery packaging has a cylindrical shape with a hollow portion through which a hanging material is inserted, and in the bag introduction process, the upper end of the recovery packaging is fixed so as to be wrapped around the hanging material or the material bag at a fixed position above the destroyed portion of the material bag, and in the bag recovery process, the lower end of the recovery packaging is sealed below the debris.

[0009] The recovery packaging has a cylindrical shape with a hollow portion through which a hanging material is inserted, and in the bag introduction process, the recovery packaging is installed in the lid member so as to surround the insertion hole, and in the bag recovery process, the recovery packaging is pulled out from the lid member and the upper end of the recovery packaging is fixed at a fixed position above the destroyed portion of the material bag so as to be wrapped around the hanging material or the material bag, and the part of the recovery packaging located below the fixed position is sealed below the remains of the material bag.

[0010] The grout material injection device of the present invention is a grout material injection device that injects grout material into a mixer, and comprises a material bag that contains grout material, is suspended into the material injection section of the mixer, and is broken within the material injection section to eject the grout material, and a recovery packaging body that is installed with a hanging material that suspends the material bag inserted therethrough, and that encloses at least the broken portion of the remains of the broken material bag.

[0011] The grout material injection device of the present invention may further include a lid member that functions as a lid for the inlet of the material bag in the material injection section, and the lid member may be installed above the material bag with a hanging material inserted through an insertion hole formed in the lid member. Effect of the Invention

[0012] According to the present invention, it is possible to provide a grout material injection method and a grout material injection device that suppress dust scattering in the surrounding area during material injection work. [Brief description of the drawings]

[0013] [Figure 1] 1 is a front view showing an offshore wind power generator to which a grout injection method and a grout injection device according to an embodiment of the present invention are applied. [Diagram 2] FIG. 2 is a schematic diagram showing a grout supply facility. [Diagram 3] FIG. 1 is a perspective view showing a grout material injection device according to a first embodiment. [Figure 4] 1(a) to 1(c) are schematic diagrams showing a grout material injection method according to a first embodiment. [Diagram 5] 5(a) and (b) are schematic diagrams showing the grout material injection method of the first embodiment following FIG. 4. [Figure 6] FIG. 5 is a perspective view showing a grout material injection device according to a second embodiment. [Figure 7] 6(a) to 6(d) are schematic diagrams showing a grout material injection method according to a second embodiment. [Figure 8] FIG. 11 is a perspective view showing a grout material injection device according to a third embodiment. [Figure 9] 13(a) to 13(c) are schematic diagrams showing a grout material injection method according to a third embodiment. [Figure 10] 10(a) and (b) are schematic diagrams showing a grout material injection method according to a third embodiment following FIG. 9. [Figure 11] 1(a) and 1(b) are diagrams showing modified examples of the grout injection method and grout injection device of the present invention. [Figure 12] 5(a) to 5(c) are diagrams showing modified examples of the grout material injection method and the grout material injection device of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of a grout injection method and a grout injection device according to the present invention will be described in detail with reference to the drawings. The grout injection method of the present embodiment is carried out at a construction site of an offshore wind turbine 101 shown in FIG.

[0015] The offshore wind turbine 101 comprises a leg 102 that extends vertically and protrudes above the seawater surface from the seabed B, and a generator body 103 attached to the upper end of the leg 102. The generator body 103 comprises a nacelle 105 and blades 107 attached to the nacelle 105. The leg 102 comprises a monopile 111 driven into the seabed B, a transition piece 113 connected above the monopile 111, and a tower 115 connected further above the transition piece 113. The main bodies of the monopile 111, the transition piece 113, and the tower 115 have a roughly circular cross section and are arranged coaxially.

[0016] The upper end of the monopile 111 is located below sea level and has a tapered shape. The lower end of the transition piece 113 has a conical inner surface that corresponds to the tapered shape of the upper end of the monopile 111. The transition piece 113 is installed on the monopile 111 such that the lower end of the transition piece 113 covers the upper end of the monopile 111, and the upper part of the transition piece 113 protrudes above the sea surface.

[0017] When constructing the offshore wind turbine 101, the verticality of the transition piece 113 is adjusted on the monopile 111, and then grout is filled into the gap (grout filling point 112) between the lower end of the transition piece 113 and the upper end of the monopile 111, and the monopile 111 and the transition piece 113 are joined via this hardened grout. The tower 115 is, for example, a vertical column made of concrete or steel, and is bolted to the upper end of the transition piece 113. By installing the transition piece 113 as described above, the verticality of the transition piece 113 is ensured so as to compensate for the vertical accuracy of the monopile 111, and therefore the verticality of the offshore wind turbine 101 is ensured.

[0018] During the grout filling operation, a SEP barge (not shown) is installed near the monopile 111, and grout is sent from equipment on the SEP barge to the grout filling point 112. High-strength grout is used as this grout. This type of grout develops its strength about 24 hours after mixing, so it needs to be mixed on the SEP barge just before use. Therefore, grout supply equipment 1 as shown in Figure 2 is provided on the SEP barge.

[0019] As shown in FIG. 2, the grout supplying equipment 1 includes a grout conveying pipe 3 connected to the grout filling portion 112, a pump device 5 for pumping grout to the grout conveying pipe 3, and a mixer 7 for supplying mixed grout to a hopper 5a of the pump device 5. The mixer 7 has a cylindrical mixer body 9, and the mixer body 9 includes a material input section 11 into which powdered grout material is input, and a material kneading section 13 for adding water to the input grout material and kneading the grout material. The material input section 11 and the material kneading section 13 are partitioned into upper and lower sections by a wire mesh 15 horizontally provided in the mixer body 9. The material input section 11 is provided with a bag introduction port 19 for introducing a material bag 17 (described later) into the material input section 11 so as to open upward. Further, a bag-breaking metal fitting 21 for breaking the material bag 17 is provided at the center of the lower part of the material input section 11 so as to protrude upward.

[0020] On the SEP barge, powdered grout material is prepared in a state of being contained in a flexible bag-shaped material bag 17. When the grout is mixed in the grout supplying equipment 1, the material bag 17 is moved while being suspended by the crane 23. Then, the crane 23 is operated to suspend the material bag 17 into the material input section 11 through the bag inlet 19. Then, the bottom of the material bag 17 is broken by the bag breaking fitting 21, and the grout material is discharged from the material bag 17. The discharged grout material passes through the wire net 15 and falls into the material mixing section 13, where it is mixed with water supplied from the water supply device 27 and is stirred and mixed by the rotary mixing blades 13a at the bottom of the material mixing section 13. The mixed grout is injected from the material mixing section 13 through the delivery passage 13b into the hopper 5a of the pump device 5, and the grout is pumped from the pump device 5 through the grout transport pipe 3 to the grout filling point 112.

[0021] In the grout supply equipment 1 as described above, after the material bag 17 breaks in the material input section 11, there is a risk that grout dust will scatter outside the material input section 11. In addition, after the grout material is input, the remains of the emptied material bag 17 are lifted and moved by the crane 23, so there is a risk that grout dust remaining in the remains will scatter. In order to suppress such scattering of grout dust, a grout material input method described below is carried out. Hereinafter, first to third embodiments of the grout material input method and the grout material input device used therein will be described.

[0022] [First embodiment] In the grout material injection method of this embodiment, a grout material injection device 31 shown in FIG. 3 is used. As shown in FIG. 3, the grout material injection device 31 includes the material bag 17 and a recovery package 33 for enclosing the remains 18 of the material bag 17 after the bag is broken. The recovery package 33 is made of a flexible material and is located above the material bag 17. For example, polyvinyl chloride, polyethylene, etc. are used as the material of the recovery package 33. The recovery package 33 is cylindrical, and a hanging wire 37 (hanging material) for hanging the material bag 17 is inserted into the tube of the recovery package 33. The upper end of the recovery package 33 is narrowed in the radial direction and fixed around the hanging wire 37 by a cable tie 34. The vertical length of the recovery package 33 is adjusted so that the remains 18 of the material bag 17 (FIG. 4(c)) can be enclosed in the grout material injection method described later. In this embodiment, the upper end of the collection package 33 is fastened around the hanging wire 37 , but the upper end of the collection package 33 may also be fastened around the upper end of the material bag 17 .

[0023] Furthermore, the grout material injection device 31 includes a lid member 35 that functions as a lid for closing the bag inlet 19 (FIG. 2). The lid member 35 is circular and fits onto the upper end of the mixer body 9 so as to close the bag inlet 19. A circular insertion hole 35a is formed in the center of the lid member 35. The insertion hole 35a is configured as a hollow part of a cylindrical part 35b that extends vertically in the center of the lid member 35. The lid member 35 is located above the recovery package 33, and a suspending wire 37 is inserted into the insertion hole 35a. The upper end of the cylindrical part 35b is connected to the crane 23 via a lid sling 39 (a suspending material for the lid member). The lid sling 39 is, for example, a cord made of the same material as the suspending wire 37. The length of the lid sling 39 is adjusted so as to enable a series of operations of the lid member 35 in the grout material injection method described later.

[0024] If the portion where the recovery package 33 is fixed to the hanging wire 37 is called the fastening portion 33a (fixed position), the fastening portion 33a is provided at a position slightly above the upper end of the material bag 17. That is, in Fig. 3, the recovery package 33 and the material bag 17 are shown separated to facilitate understanding of the structure, but in reality, the upper end of the material bag 17 is located immediately below the fastening portion 33a, as shown by the dashed line. Then, as shown in Fig. 4(a), the recovery package 33 is folded in the axial direction and positioned so as to cover the upper part of the material bag 17.

[0025] In addition, since the insertion hole 35a of the lid member 35 has a smaller diameter than the material bag 17, the lid member 35 is placed on the material bag 17 in such a state that the insertion hole 35a is caught on the upper part of the material bag 17. Then, the collapsed collection package 33 is sandwiched between the lid member 35 and the material bag 17. In this state, the length of the lid sling 39 is adjusted so that slack is generated in the lid sling 39.

[0026] A method for introducing grout material using such a grout material introducing device 31 will be described. (Bag introduction process) First, as shown in Fig. 4(a), the grout material supplying device 31 including the material bag 17, the collection package 33, and the lid member 35 is moved while being suspended by the crane 23. As shown in Fig. 4(b), the material bag 17 is suspended into the material supplying section 11 through the bag inlet 19 by operating the crane 23. At this time, the lid member 35 placed on the material bag 17 fits into the upper end of the mixer main body 9 to close the bag inlet 19. The movement of the lid member 35 to fit into the upper end of the mixer main body 9 may be manually guided by an operator positioned near the bag inlet 19.

[0027] (Bag destruction process) In the material input section 11, the bottom of the material bag 17 is broken by the bag breaking metal fitting 21, and the grout material is discharged from the material bag 17. The discharged grout material passes through the wire mesh 15 and falls into the material mixing section 13. At this time, in order to promote the discharge of the grout material, the material bag 17 is swung up and down in the material input section 11 by operating the crane 23.

[0028] (Bag collection process) After almost all of the grout material in the material bag 17 has been discharged, the remains 18 of the broken material bag 17 are pulled up through the insertion hole 35a of the cover member 35 by operating the crane 23, as shown in Fig. 4(c). At this time, the cover sling 39 is still in a slack state, so the cover member 35 continues to close the bag introduction port 19. At this time, the fastening portion 33a of the recovery package 33 is pulled up from the insertion hole 35a together with the hoisting wire 37, so that the folded recovery package 33 is pulled out from the insertion hole 35a while being stretched in the axial direction.

[0029] Then, as shown in FIG. 5(a), when the entire collection package 33 and the debris 18 of the material bag 17 are pulled up through the insertion hole 35a, the lower end of the collection package 33 is tightened to enclose the debris 18 and sealed with a cable tie 36. As described above, the operation of stretching the collection package 33 in the axial direction and the process of sealing the collection package 33 may be performed manually by an operator. In addition, the collection package 33 is preferably made of a transparent material so that the operator can clearly check the state of the debris 18 during the operation. Then, as shown in FIG. 5(b), when the hook of the crane 23 is further raised, the lid sling 39 is stretched and the lid member 35 is lifted via the lid sling 39 so as to follow the collection package 33 and the debris 18. Then, the debris 18 and the lid member 35 enclosed in the collection package 33 are moved together by the operation of the crane 23 and collected. The collected packaging body 33 and the remains 18 are discarded, and the collected lid member 35 is placed in a new material bag 17 and reused.

[0030] The effects of the grout material injection device 31 and the grout material injection method described above will be described. When the grout material in the material bag 17 is discharged in the material input section 11, dust of the grout material is generated. In particular, as described above, the dust increases when the material bag 17 is shaken up and down in the material input section 11. In the grout material injection device 31 and the grout material injection method, when the grout material in the material bag 17 is discharged in the material input section 11, the bag introduction port 19 is blocked by the cover member 35 (FIG. 4(b)). Therefore, the dust of the discharged grout material is prevented from scattering to the outside through the bag introduction port 19. In addition, since the recovery package 33 is located between the material bag 17 and the insertion hole 35a at this time, the scattering of the dust to the outside through the insertion hole 35a is also prevented.

[0031] In addition, when the remains 18 of the material bag 17 are moved from the material input section 11 and collected, the remains 18 are sealed in a recovery package 33 (FIGS. 5(a) and 5(b)). In particular, the broken portion 17a of the remains 18 of the material bag 17, from which the remaining grout material is likely to leak, is sealed in the recovery package 33. Therefore, the dust of the grout material remaining in the remains 18 is prevented from scattering to the outside during movement and collection. In addition, when the remains 18 of the material bag 17 are pulled up from the material input section 11, the remains 18 are covered by the recovery package 33 (FIGS. 4(c) and 5(a)). Therefore, even while the remains 18 are being pulled up, the dust is prevented from scattering to the outside. By preventing the dust from scattering to the outside as described above, the deterioration of the working environment can be prevented.

[0032] Furthermore, the recovery package 33 and the lid member 35 are automatically moved to the place of use together with the material bag 17, and the lid member 35 is automatically lifted and collected when the debris 18 is collected. Therefore, the use of the recovery package 33 and the lid member 35 can prevent the cycle time of the grout material injection work from becoming extremely long. Furthermore, if the recovery package 33 and the lid member 35 are attached to the material bag 17 to be used in the next work while the grout material injection work is being performed, and at least a part of the grout material injection device 31 is constructed, the cycle time of the grout material injection work can be shortened.

[0033] Second Embodiment A second embodiment of the grout material injection method and grout material injection device of the present invention will be described. In the grout material injection method of this embodiment, a grout material injection device 41 shown in FIG. 6 is used. In this embodiment, the same or equivalent components as those in the first embodiment are given the same reference numerals on the drawings, and duplicated explanations will be omitted. As shown in FIG. 6, the grout material injection device 41 is a device in which the cover member 35 is omitted, compared with the grout material injection device 31 (FIG. 3). And, instead of the cover member 35, an openable cover member 45 (openable cover portion) is provided at the upper end of the mixer body 9. The cover member 45 is composed of two semicircular members 45b attached to the upper end of the mixer body 9 via hinges, and an insertion hole 45a (FIG. 7) is formed in the center of the cover member 45 in the closed state.

[0034] The grout injection method using the grout injection device 41 is as follows. (Bag introduction process) First, as shown in Fig. 7(a), the grout material injection device 41 including the material bag 17 and the recovery package 33 is moved while being suspended by the crane 23, the material bag 17 is suspended into the material injection section 11 through the bag inlet 19 with the lid member 45 open, and as shown in Fig. 7(b), the lid member 45 is closed with the hoisting wire 37 inserted through the insertion hole 45a. The opening and closing operation of the lid member 45 may be performed manually by an operator positioned near the bag inlet 19, or may be performed by remote control or the like.

[0035] (Bag destruction process) In the material input section 11, the bottom of the material bag 17 is broken by a bag breaking fitting 21 and the grout material is discharged. (Bag collection process) After the grout material in the material bag 17 is almost entirely discharged, the remains 18 of the material bag 17 are pulled up through the insertion hole 45a of the lid member 45 by the operation of the crane 23 as shown in FIG. 7(c). At this time, the lid member 45 remains closed. At this time, the folded recovery package 33 is pulled out of the insertion hole 45a while being stretched in the axial direction. Then, as shown in FIG. 7(d), when the entire recovery package 33 and the remains 18 are pulled up through the insertion hole 45a, the lower end of the recovery package 33 is squeezed to contain the remains 18 and sealed with a cable tie 36. Then, the remains 18 enclosed in the recovery package 33 are moved and collected by the operation of the crane 23. The collected recovery package 33 and the remains 18 are discarded.

[0036] The grout material injection device 41 and the grout material injection method as described above can also provide the same effects as those of the grout material injection device 31 and the grout material injection method of the first embodiment.

[0037] Third Embodiment A third embodiment of the grout injection method and grout injection device of the present invention will be described. In the grout injection method of this embodiment, a grout injection device 51 shown in Fig. 8 is used. In this embodiment, components that are the same as or equivalent to those in the first or second embodiment are given the same reference numerals on the drawings, and duplicated explanations will be omitted.

[0038] As shown in FIG. 8, the grout material injection device 51 is different from the grout material injection device 31 (FIG. 3) in the manner in which the recovery package 33 is installed. That is, in the grout material injection device 51, the recovery package 33 is installed on the lid member 35. More specifically, the suspending wire 37 is inserted through the recovery package 33 and the lid member 35, and the recovery package 33 is wound around the cylindrical portion 35b of the lid member 35 in a state in which it is pressed and folded in the axial direction. Then, as shown in FIG. 9(a), the lid member 35 is placed on the material bag 17 in a state in which the insertion hole 35a is hooked on the upper portion of the material bag 17. At this time, the lid sling 39 is connected in a loose state to the lower side surface of the cylindrical portion 35b at a position lower than the recovery package 33, not at the upper end of the cylindrical portion 35b. Also, the length of the recovery package 33 in a state in which it is stretched in the axial direction is several times longer than the recovery package 33 of the first embodiment.

[0039] The grout injection method using the grout injection device 51 is as follows. (Bag introduction process) First, as shown in Fig. 9(a), the grout material injection device 51 including the material bag 17, the collection package 33, and the lid member 35 is suspended by the crane 23 and moved, and as shown in Fig. 9(b), the material bag 17 is suspended into the material injection section 11 through the bag inlet 19. At this time, the lid member 35 fits onto the upper end of the mixer main body 9 to close the bag inlet 19.

[0040] (Bag destruction process) In the material input section 11, the bottom of the material bag 17 is broken by a bag breaking fitting 21 and the grout material is discharged. (Bag collection process) After the grout material in the material bag 17 is almost entirely discharged, the remains 18 of the material bag 17 are pulled up through the insertion hole 35a of the cover member 35 by operating the crane 23, as shown in FIG. 9(c). When the upper end of the remains 18 emerges upward from the insertion hole 35a, the upper end of the recovery package 33 is pulled upward from the cylindrical portion 35b. Then, the upper end of the recovery package 33 is squeezed radially and secured around the hoist wire 37 at a position above the remains 18 by the cable tie 34. After that, when the remains 18 is further pulled up as shown in FIG. 10(a), the recovery package 33 of the cylindrical portion 35b extends upward accordingly. Then, when the entire remains 18 is pulled up through the insertion hole 35a, the recovery package 33 is squeezed so as to enclose the remains 18 at a position below the remains 18, as shown in FIG. 10(b), and is sealed with the cable tie 36. The collection packaging body 33 is cut at a position below the cable tie 36. The remaining collection packaging body 33 is folded again and placed in the cylindrical portion 35b. Note that the operation of stretching the collection packaging body 33 in the axial direction and placing it again in the cylindrical portion 35b, as well as the process of sealing the collection packaging body 33, may be performed manually by an operator.

[0041] 10(c), when the hook of the crane 23 is further raised, the lid sling 39 is tensioned and the lid member 35 is lifted via the lid sling 39 so as to follow the recovery package 33 and the debris 18. The crane 23 is then operated to move and recover the debris 18 enclosed in the recovery package 33 together with the lid member 35. The recovered recovery package 33 and debris 18 are discarded.

[0042] The recovered lid member 35 can be reused as it is for the next grout injection operation because the remaining recovery package 33 is still attached to the cylindrical portion 35b. As described above, the recovery package 33 is several times longer than that of the first embodiment, so that the lid member 35 can be used repeatedly for the grout injection operation multiple times without refilling the recovery package 33, depending on the length.

[0043] The grout material injection device 51 and the grout material injection method as described above can also provide the same effects as those of the grout material injection device 31 and the grout material injection method of the first embodiment.

[0044] The present invention can be embodied in various forms, including the above-described embodiment, with various modifications and improvements based on the knowledge of those skilled in the art. In addition, the following modified examples can be constructed by utilizing the technical matters described in the above-described embodiment. The configurations of each embodiment may be used in appropriate combination.

[0045] For example, the collection package 33 is not limited to being cylindrical, and may be flat with a hanging wire 37 inserted through the center, as shown in Fig. 11(a). In this case, too, the outer edge of the collection package 33 can be squeezed and the debris 18 can be enclosed with a cable tie 36 to contain it.

[0046] For example, the lid member 35 may be omitted in the first embodiment. Even in this case, the presence of the collection package 33 can prevent dust from scattering in the bag collection step. Also, the collection package 33 may be omitted in the first embodiment. Even in this case, the presence of the lid member 35 can prevent dust from scattering in the bag destruction step.

[0047] For example, in the case where the cover member 35 is omitted in the first embodiment, in the bag introduction process, the lower end of the collection package 33 may be placed over the upper end of the mixer main body 9 to block the bag introduction port 19, as shown in FIG. 11(b).

[0048] In the first to third embodiments, the upper end of the recovery package 33 is fixed around the hanging wire 37 by the cable tie 34, but the location where the upper end of the recovery package 33 is fixed may be a part of the material bag 17. That is, as shown in FIG. 12(a), strictly speaking, the material bag 17 can be divided into a destruction part 17a that actually contains the grout material G and is destroyed in the material input part 11 to discharge the grout material, and an upper part 17b that is above the destruction part 17a and does not participate in the discharge of the grout material. In the first to third embodiments, the upper end of the recovery package 33 may be fixed around the upper part 17b of the material bag 17 by the cable tie 34. With this configuration, the destruction part 17a of the remains 18 of the material bag 17 can be enclosed in the recovery package 33, so that the scattering of dust during the bag recovery process can be suppressed.

[0049] Furthermore, according to the above-mentioned method in which the upper end of the recovery package 33 is fastened to the upper portion 17b of the material bag 17, the recovery package 33 can be attached in advance to a plurality of material bags 17 prepared on the SEP barge. Therefore, compared to the method in which the recovery package 33 is fastened to the hoisting wire 37 during the slinging work of the material bag 17, the slinging work is simplified and the cycle time of the grout material injection work can be shortened.

[0050] In the third embodiment, the recovery package 33 having a length sufficient for multiple grout injection operations is placed on the lid member 35, but as shown in FIG. 12(b), the recovery package 33 may have a perforation 33c formed for each grout injection operation. This improves the workability of cutting the recovery package 33 in the bag recovery process. As another means for improving the workability, a cutter section 35c for cutting the recovery package 33 may be provided on the upper end surface of the cylindrical section 35b of the lid member 35 as shown in FIG. 12(c). This eliminates the need to separately prepare a cutting device for the recovery package 33. As yet another means, in the cutting process, the worker may cut and seal the recovery package 33 using a handy sealer with a cutter function. In this case, the cutting of the recovery package 33 and the sealing of the lower end can be performed simultaneously, so that the sealing process of the lower end of the recovery package 33 using the cable tie 36 can be omitted, further improving the workability. [Explanation of symbols]

[0051] 7...mixer, 11...material feeding section, 17...material bag, 17a...destroyed part, 18...debris, 19...bag inlet, 31, 41, 51...grout feeding device, 33...recovery packaging, 33a...fastening section (fixed position), 35...lid member, 35a...insertion hole, 37...suspension wire (suspension member), 39...lid sling (suspension member for lid member), 45...lid member (opening / closing lid section), G...grout material.

Claims

1. A method for introducing grout material into a mixer, comprising: A bag introduction process in which a hanging material bag containing the grout material is hung in a material input section of the mixer with a hanging material for hanging the material bag being inserted into a collection package; a bag breaking process in which the material bag is broken in the material input section to eject the grout material; and a bag recovery process for enclosing at least the portion of the remains of the material bag that has been destroyed in the bag destruction process in the recovery package and hoisting the remains from the material input section with the hanging material to recover the remains. In the bag introduction step, a lid member that functions as a lid for an inlet of the material bag in the material input section is formed in the lid member, and the hanging material is inserted into an insertion hole that is smaller than the material bag, and the lid member is placed on the material bag so as to be hooked onto the material bag; a cylindrical recovery package that is provided separately from the lid member is folded in the cylindrical axial direction with the hanging material inserted into a hollow portion, and is placed between the material bag and the lid member; and the material bag, the lid member, and the recovery package are hung from the hanging material in a state in which the upper end of the recovery package is fixed so as to be wrapped around the hanging material or the material bag at a fixed position above the destruction portion of the material bag, When the material bag is hung into the material input section, the lid member is lowered together with the material bag to cover the inlet port, In the bag recovery step, A grout material injection method, in which, while the lid member remains covering the inlet, the debris and the recovery package are lifted by the hanging material through the insertion hole of the lid member, and the recovery package is sealed so that the debris is contained within the recovery package that is pulled out of the insertion hole while being stretched in the axial direction of the tube.

2. In the bag recovery process, 2. The grout material injection method according to claim 1, wherein after the recovery package is sealed, the lid member is lifted from the inlet following the debris and the recovery package via a lid member hanging material connected to the lid member separately from the hanging material, and is recovered together with the debris and the recovery package.

3. A grout material injection device for injecting grout material into a mixer, A material bag that contains the grout material, is suspended in the material input section of the mixer, and is broken in the material input section to discharge the grout material; a recovery package that is installed with a hanging material for hanging the material bag inserted therethrough and that encloses at least the destroyed portion of the remains of the destroyed material bag; a cover member that descends together with the material bag when the material bag is suspended into the material input section and covers an inlet of the material bag in the material input section to function as a cover for the inlet, The cover member is The lid member is formed with an insertion hole smaller than the material bag, and the hanging material is inserted into the insertion hole, and the lid member is placed on the material bag so as to be hooked on the material bag, The collection package is The material bag is provided separately from the lid member, has a cylindrical shape, and is folded in the axial direction of the cylinder with the hanging material inserted through a hollow portion, and is installed between the material bag and the lid member. The upper end of the recovery package is fixed so as to be wrapped around the hanging material or the material bag at a fixed position above the destruction portion of the material bag. Grout injection device.

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