JP2016017350A - Horizontal erection device and horizontal erection method for board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a novel horizontal erection device and a horizontal erection method for a board that replaces a filling pipe used in a conventional chemical feeding method and others and may mitigate excavation work.SOLUTION: A horizontal erection device for a board is used for installing a flexible board 5 in an almost horizontal direction from a predetermined depth of a ground, the flexible board being capable of discharging a fluid in the ground to a ground surface and/or discharging an injection material in the ground. A main part of the device includes: a guide member 2 that is penetrated into and installed or drawn out in a vertical direction, from the ground surface side into the ground; delivery means 3 installed in a state supported by the guide member 2, for driving an expansion member 4 in an almost horizontal direction, in a way that allows expansion, into the ground from a part around a tip of the guide member; and connection means (an anchor 7A and a connected body 45 in an example of Fig. 3) that detachably connects a tip side of the board 5 to a tip side of the expansion member, the board being drawn in from the ground surface side along the guide member 2. The board 5 is towed by the expansion member when the expansion member elongates, and is left in the ground when the expansion member contracts.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a horizontal laying apparatus and a horizontal laying method suitable for improving, for example, a ground directly under a structure that is difficult to work as a target ground using a ground injection board.

  For example, as an improvement method for soft ground, use a heavy machine to build a drain material together with a mandrel from the ground surface into the ground, and then pull out the mandrel and obtain an anchor retaining action at the tip of the drain material. The vertical drain method is to cut the upper end side of the ground surface side and leave the separated drain material in the ground, so that the water in the ground is sequentially sucked up to the ground surface by the drain material and discharged to the ground side. is there.

  As a drain material used in this drain method, there is a flexible plastic board provided with a number of partitions in the longitudinal direction. The present applicant pays attention to this board and developed a ground injection board and a ground injection method using the same to solve the problems of Patent Documents 1 and 2 (Japanese Patent Application No. 2014-7380, hereinafter described in this). The invention was called Prior Application 1). This board is made of a flexible plate, and has a plurality of injection material transfer elongated holes extending in the longitudinal direction within the plate thickness, and is provided at a plurality of locations on the side surface to communicate with the elongated holes. An injection port for discharging the injection material flowing along the long hole to the outside is provided. In addition, the construction method includes the step of inserting the board into the placement pipe and placing it in the ground, then pulling out the placement pipe while leaving the board in the ground and exposing one end side to the ground surface side. And a step of connecting an injection material introduction part for introducing the injection material into the long hole on one end side of the board, and a predetermined injection material through the injection material introduction part with one or more long holes A process of pumping to the hole and discharging from the side inlet to the gap in the ground is performed. In the above construction method, by appropriately setting the height of the discharge port for each partition of the board, it is possible to inject the ground improvement material to the desired depth position in the ground on average, so it is more economical depending on the ground properties The ground can be improved.

JP 2004-316394 A JP 2007-16536 A

  By the way, for example, in a place where a concrete underground structure is buried to a predetermined depth in the ground, the supporting ground E of the underground structure A is soft as shown in FIG. It may be pointed out later that a hollow portion or a slack has occurred in the place. For the purpose of preventing the subsidence and deformation and damage caused by the earthquake, if it is necessary to improve the ground in advance, the surrounding ground of the underground structure can be improved by applying known methods. It is difficult to improve the ground directly under the structure.

  That is, in such a case, as illustrated in the drawing, the injection hole a1 and the air vent hole a2 are drilled through the bottom plate A1 of the underground structure A, and the cavity B of the lower ground E is passed through the pipes P1 and P2. If the air is vented while injecting the chemical solution, the cavity B and the slack portion can be repaired. However, in such a construction method, since a large number of holes a1 and a2 are formed in the structure itself, there is a concern that the hole portion may be weakened or aged. That is, after construction, post-construction work such as repairing a damaged portion by drilling or reinforcing work is required, which adversely affects the strength of the underground structure A and the construction period becomes long, which is not economical.

  In addition, as a ground improvement method that does not involve damage to the underground structure or post-construction, a vertical hole or groove is excavated near the underground structure, and the horizontal hole toward the lower ground of the bottom of the underground structure in the vertical hole or groove is substantially horizontal. If the board can be built in, the drain method or chemical injection method can be applied, but in order to construct it, it is necessary to widen the hole or groove width, and it is also not economical because it is a large-scale construction.

  The present invention has been made to solve the above-described problems. Its purpose is to enable the board to be installed in a substantially horizontal direction even from a relatively small vertical hole, so that the lower ground can be effectively improved without damaging the underground structure. An erection device and method are provided. Another object is to enable economical construction in a short time. Further, other objects will be clarified in the following description of contents.

  In order to achieve the above object, the present invention of claim 1 is specified with reference to FIG. 1 and FIG. 2, and includes fluid in the ground (fluid includes liquid, gas, powder, fluid, etc. ) Can be discharged to the ground surface and / or the flexible board 5 that can discharge the injected material into the ground is used when installed in a substantially horizontal direction from a predetermined depth in the ground. A guide member 2 that is vertically inserted and pulled out toward the inside, and is provided in a state supported by the guide member, and an elastic member that extends from the periphery of the front end side of the guide member toward the substantially horizontal direction in the ground. And a connecting means (anchor 7A and combined body 45) for releasably connecting the leading end side of the board drawn from the surface side along the guide member 2 to the leading end side of the expanding and contracting member. And the board There while being towed by the elastic member during elongation of the elastic member 4, and characterized in that it is left on the ground during the reduction of the elastic member 4.

  In the present invention described above, the board is the same as that of a known plastic drain material in that it has a flexible elongated plate shape and a plurality of long holes are formed in the plate thickness. Depending on the application and purpose, it is preferable to have the structure described in the prior application 1, that is, the injection port provided on both sides or one side of the board and leading to the long hole in the plate thickness.

  The feeding means extends or contracts in a substantially horizontal direction by a rotary drive mechanism such as a motor or a piston mechanism from the periphery of the distal end side of the guide member while being supported by the guide member. As the elastic member, the meshing structure described in Japanese Patent Application No. 2014-28169 shown in FIG. 2 and FIG. 3 (hereinafter, the invention described herein is referred to as the prior application 2), and the similar shape as shown in FIG. A telescopic or telescopic structure in which hollow cylinders are built in order of size, a single link connection body as shown in FIG. Of course, it may be other than that. Towing the board includes a configuration as shown in FIG. 6 where the board is pulled by a single feeding means, and a configuration as shown in FIG. 9 where the board is pulled by a plurality of feeding means. The connecting means maintains the engagement during the expansion process of the elastic member and releases the engagement during the contraction process. In the example of FIG. 4, the anchor attached to the front end side of the board is pulled in a connection mode that is engaged when the expansion / contraction member is advanced, and is disengaged by the anchor effect when the expansion / contraction member is contracted so that the board can be left unattached. It becomes an aspect. In the example of FIG. 9, it is pulled in a connected state in which a concave portion provided on the distal end side of the elastic member is engaged with the convex portion on the side surface of the anchor attached to the distal end side of the board, and the convex portion is formed when the elastic member is reduced. It becomes a non-connecting mode in which the concave portion is disengaged and the board can be left.

The present invention as described above is more preferably embodied as described in claims 2 to 4. That is,
(1) The injection nozzle 8 provided on the distal end side of the telescopic member 4 and the fluid transfer supply pipe 23 which is drawn from the ground surface along the guide member 2 and whose distal end is connected to the ejection nozzle 8 are provided. (Claim 2).
(2) The expansion / contraction member 4 has flexibility, is integrally joined by the feeding operation of the feeding means 3 and is rigidized while sequentially extending in the feeding direction, and is divided or reduced by the reduction operation of the feeding means 3 It is the structure which consists of a pair of link coupling body 4A, 4B which fits in a storage space in a folding state (Claim 3).
(3) Further, when the stretchable member 4 is formed by coupling the link connectors 4A and 4B, a hollow portion 40 through which a long object such as the board 5 can be inserted in the longitudinal direction is formed inside the stretchable member. (Claim 4).

(4) As shown in FIG. 10, the elastic member uses a unit link member 58 having a hollow portion through which a long object such as the board can be inserted in the longitudinal direction, and the unit ring members are connected to each other. Are connected to each other through hinges 59, maintain a straight line state in a horizontal state, and can be bent only upward in one direction with respect to the other side via the hinges 59. (4D) (Claim 5).
(5) As shown in FIG. 9A, the feeding means or the expansion / contraction member is composed of a pair arranged at a predetermined interval, and the board 5 is pulled together by the expansion / contraction members 4C and 4C. (Claim 6).

Claims 7 to 10 are specified as a method of horizontally installing the board. That is,
(5) A board with a horizontal construction method in which a flexible board capable of discharging the fluid in the ground to the ground surface and / or discharging the injected material into the ground is installed substantially horizontally in the ground from a predetermined depth of the ground. The extending member provided around the front end of the ground penetration guide member allows the elastic member to expand and contract in a substantially horizontal direction, and the connection for releasably connecting the front end side of the board to the front end side of the elastic member. And a guide member positioning step of penetrating and arranging the guide member to a predetermined depth in the ground, and extending the elastic member to a predetermined length by pulling the board by the feeding means, and then reducing the elastic member The board is left in the ground and the board is left in the ground, and the board is provided with a cutting step for cutting off the ground surface side of the board from the board supply means ( Motomeko 7).

(6) In the process of extending the expansion / contraction member, a drilling fluid is injected from the injection nozzle provided on the distal end side of the expansion / contraction member (for example, water or a fluid or granular material is accompanied by high-pressure air). It is a structure (Claim 8).
(7) In the guide member erection step, the guide member is inserted into a previously drilled vertical hole and positioned (Claim 9).
(8) In the guide member erection step, the excavating means is rotated by the rotating means to excavate the ground to form the vertical hole, and at the same time, the guide member is positioned in the vertical hole. ).

  In the first aspect of the present invention, a guide member, a feeding means, and a connecting means are provided, and the flexible board is pulled by the expansion / contraction member when the expansion / contraction member is extended, and the connection of the connection means is released when the expansion / contraction member is contracted. Can be left behind. Therefore, the apparatus of the present invention pulls the flexible board along the guide member to a predetermined ground depth as described in claim 6 and then is pulled by the extension of the expansion / contraction member by the feeding means so as to extend substantially horizontally from the predetermined depth in the ground. For example, even in places where it is difficult to work, such as directly under the structure, the building work can be efficiently performed without damaging the structure. As a result, the present invention is a vertical drain construction method for discharging the fluid in the ground to the ground surface side or a similar construction method, and a ground injection construction method for injecting an injection material such as a chemical into the ground gap or a similar construction method. It can contribute to the expansion of application opportunities for construction methods.

  According to the second aspect of the present invention, it becomes possible to inject excavation fluid in the course of expansion by the injection nozzle at the tip of the expansion / contraction member, or to inject the backfilling fluid into the low density portion or the hollow portion generated by the retraction of the expansion / contraction member. For this reason, in the present invention, for example, even if the ground property is hard, it is possible to horizontally enter the ground while excavating with the high-pressure jet of the improving fluid, so that the expansion and contraction member can be extended even if the extension operation output of the feeding means is small. To.

  The invention of claim 3 specifies a specific configuration example of the elastic member. This includes, for example, the structure known as “zip chain lifter” (registered trademark), and the structure described in the above-mentioned prior application 2.

  In the invention of claim 4, for example, the board can be pulled horizontally without being affected by the ground properties because it can be pulled to a target position while inserting a long object such as a board along the inner hollow portion of the elastic member. Can be built in.

  In the invention of claim 5, for example, the structure of claim 3 or 4 can be simplified, and a long object such as a board or a supply pipe can be provided along the inner hollow portion of each unit link member as shown in FIG. Since it can be pulled to the target position in the inserted state, the board can be laid horizontally without being affected by the ground properties.

  According to the sixth aspect of the invention, the desired flexible board can be pulled by the pair of feeding means or each of the telescopic members, so that a large traction force and quick and stable operation can be obtained.

  In the invention of claim 7, after the guide member is penetrated and arranged to a predetermined depth in the ground, the horizontal erection of the board is completed by the operation of the horizontal erection of the board, the remaining in the ground, and the edge cutting of the board. The construction cycle per board is short and economical construction is possible. In other words, in the method of the present invention, for example, a vertical drain construction method that realizes quick erection work even in a difficult place such as directly under a structure, thereby discharging the ground fluid to the ground surface side or improving the ground. In addition to this, it is possible to expand the application opportunities of a similar construction method, a ground injection method in which an injection material such as a chemical solution is injected into the ground gap or a similar construction method.

  In the eighth aspect of the invention, as the horizontal laying method of the board according to the sixth aspect, since the drilling fluid is ejected from the spray nozzle provided in the stretchable member during the extension process of the stretchable member, the extension member is extended by the feeding means. Can be performed more stably and quickly, and the load can be reduced. In short, it is advantageous in realizing short-time construction.

  According to the ninth aspect of the present invention, since the guide member is inserted into the vertical hole after the vertical hole is excavated by the dedicated excavator according to the sixth or seventh aspect, the entire configuration of the device used can be simplified.

  In invention of Claim 10, in Claim 6 and 7, since a guide member can be built simultaneously with excavation of a vertical hole, a construction cycle can be shortened.

(A) is the model whole block diagram shown in the construction standby state after completion | finish of a board installation in a substantially horizontal direction in the ground with the apparatus of a form example, (b) is CC sectional expanded sectional view of (a). . It is a figure for demonstrating the delivery means of the said apparatus. (A) is a block diagram for demonstrating the expansion-contraction member of the delivery means of FIG. 2, (b) is a block diagram which shows an example of the link coupling body which comprises the expansion-contraction member. (A) And (b) is a block diagram which shows the relationship between the said expansion-contraction member, an injection nozzle, a flexible board, and an anchor. (A) is a schematic diagram for demonstrating operation | movement at the time of inject | pouring using the board built in the ground, (b) is a schematic side view which shows an injection | pouring state. It is a flowchart which shows the example of a procedure at the time of building a board horizontally with the apparatus of FIG. (A) is a figure which shows the positioning process of a guide member, (b) is a figure which shows the expansion | extension process of an expansion-contraction member, (c) is a figure which shows the contraction process of an expansion-contraction member. (A) is the block diagram which inject | pours injection materials, such as a chemical | medical solution, into the ground from both surfaces of a board, (b) is the block diagram which has inject | poured from one side of the board as the modification. The modification 1 of the said apparatus is shown, (a) is a schematic diagram which shows the process which is extending | stretching the expansion-contraction member of a delivery means, (b) is a schematic diagram which shows the process in which the expansion-contraction member is shrunk | reduced. Modification 2 of the above-mentioned apparatus is shown, (a) is a schematic diagram corresponding to FIG. 9 (a), (b) is a schematic diagram corresponding to FIG. 4 (a). It is explanatory drawing which shows an example of the ground improvement construction right under the conventional underground structure.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments to which the present invention is applied and modifications thereof will be described below with reference to the drawings. In this description, the apparatus structure shown in FIGS. 1 to 4, the method of horizontally installing the board shown in FIGS. 5 to 8 using the device structure, and the ground improvement example using the board shown in FIGS. 5 and 8. The modification 1 shown in FIG. 9 and the modification 2 shown in FIG. 10 will be described in detail in this order. Note that some of the drawings are omitted or schematically illustrated.

(Equipment structure) As shown in FIGS. 1 to 4, the horizontal laying device 9 of the board is capable of discharging the fluid (gas or liquid) in the ground to the ground surface among the ground improvement devices as shown in FIGS. This is suitable when the flexible board 5 that can be discharged into the ground is installed in a substantially horizontal direction from a predetermined depth in the ground. The main part of the apparatus is a base machine 1 that supports the leader 10 upright on the distal end side, and a guide member 2 that is moved up and down along the leader 10 and vertically inserted into or extracted from the ground side into the ground. And a feeding means 3 that is supported by the guide member 2 to drive the telescopic member 4 so as to extend and contract from the periphery of the front end side of the guide member in a substantially horizontal direction within the ground, and is drawn in from the ground surface along the guide member 2 Connecting means (anchor 7A and combined body 45) for releasably connecting the front end 5b of the board 5 to the front end side of the telescopic member 4 is provided. The operating feature is that the board 5 is pulled by the expansion / contraction member when the expansion / contraction member 4 is extended, and is left in the ground when the expansion / contraction member 4 is contracted.

  Here, in the examples of FIGS. 1 and 9, it is known that a cavity B and a slack are generated immediately below the underground structure A as an existing structure, and the cavity B is backfilled and includes the cavity B. It is the setting which improves the ground using the board 5 built under the object in the ground. The board 5 is the same as that described in the above-mentioned prior application 1, and is formed of a flexible elongated plate and has a plurality of long holes 50 partitioned by a partition 51 within the plate thickness. Further, the board 5 has a plurality of inlets 53 provided on both sides or one side as shown in FIGS. 5 and 7 and communicating with the long holes 50 within the plate thickness. Each injection port 53 is provided with a window 52 communicating with the long hole 50 on both side surfaces or one side surface of the boat 5, and a guide plate (guide member of the prior application 1) 54 disposed in the long hole 50 from the window 52. The injection material transferred along the long hole 50 is discharged to the outside. When the guide plate 54 is configured to discharge from both side surfaces as shown in FIGS. 5 and 7A, the guide plate 54 is substantially U-shaped divided by the intermediate plate portion 54a and the both side plate portions 54b. If it is the structure which discharges from a side surface, it will become a shape which is a rectangular container shape and lacked the corresponding side surface for windows. Reference numeral 70 in FIG. 5 is a hole closing cap attached to the tip of the board as necessary. Please refer to the prior application 1 for details.

  The details of the device are as follows. In FIG. 1, the base machine 1 is equipped with a board reel 6 that supports a leader 10 in an upright state and winds up a board 5. A movable support 12 is disposed in the leader 10 so as to be movable in the vertical direction of the leader by an elevating mechanism 13 such as a rack and pinion. The movable support body 12 constitutes an elevating mechanism 13 and supports a movable side mechanism portion (not shown) meshed with a fixed side mechanism portion on the reader 10 side, and an upper side of the guide member 2 (an outer cylinder 21 described later). A holder mechanism (not shown) and a rotating mechanism 14 for rotating the guide member 2 (an inner cylinder 20 described later) are held.

  The leader 13 has an upper side of a guide 16 attached to the upper side and supporting the upper side of the pipe 18 and a hydraulic oil pipe (introduction path and discharge path) 19 connected to a hydraulic device (not shown). And a brace 29 attached to the lower side for restricting the deflection of the guide member 2. The upper end of the pipe 18 is connected to the upper end of the supply pipe 22 via the swivel 15 or the like. Although not shown, the upper end of the pipe 19 is connected to a hydraulic hose 24 that is piped to the guide member 2 (a gap between the inner cylinder 20 and the outer cylinder 21) via a swivel 15 or the like. ing. The hydraulic hose 24 is connected to rotation driving means (not shown) such as a hydraulic motor that constitutes the feeding means 3 and extends or contracts the telescopic member 4.

  Further, a guide sheave 11 is provided on the top of the leader 13. Then, the drawing end 5b of the board 5 fed out from the board reel 6 serving as a board supply means is moved downward from the top along the guide member 2 around the guide sheave 11, and enters a casing 37 to be described later. At the same time, it is guided by a roller 39 provided in the housing 37 and is inserted from the inside of the elastic member 4 to the outside through the inside of a combined body 45 to be described later and is prevented from coming off by the anchor 7A.

  The guide member 2 includes an inner cylinder 20 and an outer cylinder 21 as shown in FIG. The inner cylinder 20 has a drilling means 25 connected to the lower side, and a supply pipe 22 that is piped along the cylinder and transfers a fluid for excavation and backfilling. The excavating means 25 includes a lower excavating blade 26, an anti-rotation plate 27 on the excavating blade 26, and a stirring blade 28 on the excavating blade 26. The excavating means 25 is provided near the excavating blade 26 and connected to the supply pipe 22. It has an injection nozzle (not shown). Then, the excavation and backfilling fluid is sent from the supply pipe 22 to the injection nozzle via the swivel 15 provided in the upper part of the inner cylinder 20 and is injected. The outer cylinder 21 is provided so as to maintain a predetermined gap between the outer cylinder 21 and the inner cylinder 20. In this example, as shown in FIG. 4, a supply pipe 23 for transferring excavation and backfilling fluid to the injection nozzle 8 provided on the distal end side of the expansion / contraction member 4 using the gap, and the hydraulic hose 24 described above are provided. Piping. In addition, piping of the supply pipe 23 and the hydraulic hose 24 may be piped along the outer peripheral surface of the outer cylinder 21, for example, other than this example.

  The feeding means 3 is basically the same as the telescopic device described in the above-mentioned prior application 2, is housed in the casing 37, and the guide 37 is fixedly supported by the outer cylinder 21 of the guide member 2 in the guide 37. The telescopic member 4 extends or contracts in a substantially horizontal direction from the vicinity of the front end side of the member, that is, from an entrance (not shown) provided in the housing 37. The expansion / contraction member 4 has flexibility, is integrally joined by the feeding operation of the feeding means 3, is rigidized while sequentially extending in the feeding direction, and is stored in a divided or folded state by the reduction operation of the feeding means 3. 4A and 4B, which are a pair of link coupling bodies (same as the unit link member coupling body of the prior application 2). The stretchable member 4 is configured to form a hollow portion 40 in which the board 5 can be disposed in the longitudinal direction on the inside when the stretchable member is formed by coupling the link connectors 4A and 4B.

  Detailed description. 2 to 4, reference numeral 37 denotes a housing that houses the feeding means 3. A pair of support bases 35 are disposed in the housing 37 so as to face each other. The two support bases 35 are fed from the respective rotary bodies 30 as first and second rotary bodies 30 and 30 for winding or feeding the first and second link coupling bodies 4A and 4B as the feeding means 3, respectively. In addition, a pair of rollers 38 which are pressure bonding means for pressing the first and second link coupling bodies 4A and 4B from above and below are supported.

  That is, the feeding means 3 includes first and second link connectors 4A and 4B formed by sequentially connecting a plurality of unit link members 41 constituting the expandable member 4 so as to be rotatable using a hinge 42. And a pair of upper and lower first and second rotating bodies 30 and 30 for winding or feeding the link connecting bodies 4A and 4B, the rotating body drive shaft 33 of each rotating body 30, and one rotational drive shaft 33. And a rotational drive means (not shown) that is rotationally driven by a hydraulic motor or the like. Reference numeral 36 is in the housing 37 and indicates a schematic arrangement location of the rotating body driving means.

  In addition, the link coupling bodies 4A and 4B are coupled at the tip by the coupling body 45, and are coupled to the coupling surface 41a coupled by the hinge 42 and the non-coupling surface (the concave portion 43 and the convex portion 44) opposite to the coupling surface 41a. And the non-connecting surfaces of the link connecting bodies 4A and 4B sent out from the rotating body 30 are brought into contact with each other through the engagement of the concave portions 43 and the convex portions 44. . Furthermore, the connection surface 41 a is provided with a recess 46 that engages with the protrusion 32 provided on the outer periphery of the rotating body 30.

  Furthermore, although the above-mentioned link coupling bodies 4A and 4B are schematically shown in FIG. 3B, they are spirally wound around the first and second rotating bodies 30 and 30 so as to have a required length. It can be formed. In this case, the first and second rotating bodies 30 and 30 have a depth width that allows spiral winding, and the protrusions 32 are formed on the outer periphery of the rotating body 30 and corresponding to the spiral shape. Further, in the unit link member 41, the two unit link members 41 to be coupled are coupled with each other at an inclination angle α so that the link coupling bodies 4A and 4B are spirally wound. Please refer to the description of the relevant part of the prior application 2 for details.

  The combined body 45 has a flat rectangular shape penetrating back and forth in an internal cavity, the front end side is opened as a rectangular entrance / exit 45a through which the board 5 is inserted, and the rear end side of both link coupling bodies 4A, 4B, It is integrated through the engagement of the concave portion 43 and the convex portion 44, that is, it is joined to the tip which becomes the elastic member 4. On both sides of the combined body 45, the injection nozzle 8 is disposed so that its injection port faces forward and is fixed via a bracket 47. The tip of the supply pipe 23 is connected to the rear end of each spray nozzle 8 via a connector 8a. In this structure, high-pressure fluid is injected from the injection nozzle 8 through the pipe 18, swivel 15, and supply pipe 23 from the excavation fluid production plant provided on the ground surface side to excavate the ground, or to produce backfill fluid. The backfill material and the improved material are injected from the injection nozzle 8 through the pipe 18, the swivel 15, and the supply pipe 23 from the plant.

  Further, as shown in FIG. 4, the drawing end 5b of the board 5 is inserted outside the opening 45a from the inside of the elastic member 4 through the coupling body 45 while being guided by the roller 39 in the housing 37. It is prevented from coming off by the anchor 7A. The anchor 7A has a plate shape slightly larger than the opening 45a, and has slits 7a and 7b for board insertion provided in two upper and lower stages. The drawer end 5b is attached to the anchor 7A by passing through one slit 7a as shown in FIG. 4 (b) and then turning back and passing through the other slit 7b. The tip end side of the member 4 is releasably engaged.

  In the structure as described above, the anchor 7 </ b> A and the combined body 45 serve as a connecting means for releasably connecting the drawn-out end 5 b of the board drawn from the surface side along the guide member 2 to the distal end side of the elastic member 4. Then, when the expansion / contraction member 4 is extended, the connection state of the connection means is maintained, the drawer end 5b is pulled by the expansion / contraction member, and when the expansion / contraction member 4 is contracted, the connection means is disconnected and the anchor 7A is locked. Due to the effect, the board 5 is left in the ground, that is, the board 5 can be installed in the horizontal direction.

(Horizontal erection method) Next, a series of steps when the board 5 is erected using the above-described horizontal erection device 9 will be described with reference to FIGS. The connecting step of releasably connecting the front end side of the board 5 to the front end side of the expansion / contraction member 4 is performed during the construction waiting period in which the guide member 2 is lifted as shown in FIG. The end 5b is connected to the tip of the elastic member 4, that is, the combined body 45 via the anchor 7A.

  Next, as shown in FIG. 7 (a), the guide member positioning step is a guide member positioning step of penetrating and arranging the guide member 2 to a predetermined depth in the ground. In this step, the excavation motor of the rotating mechanism 14 is driven and the elevating motor of the elevating mechanism 13 is driven to lower the guide member 2 via the movable support 12 from the construction standby state of FIG. Then, the ground is excavated by the excavating blade 26. At that time, the excavating fluid is sent from the supply pipe 22 to the injection nozzle provided in the vicinity of the excavating blade 26 via the pipe line 18 and the swivel 15 and injected. However, this injection can be omitted. In this process, as shown in the figure, when the excavating blade 26 reaches the predetermined depth below the bottom structure A1 near the underground structure A, the guide member 2 is supported so as to be stationary, and then the excavation described above is performed. The supply of the working fluid is stopped, and the excavating motor of the rotating mechanism and the lifting motor of the lifting mechanism are stopped (ST1 to ST6 in FIG. 6).

  Next, as shown in FIG. 1 (a), the board leaving step is to build the board 5 in a substantially horizontal direction from a predetermined depth of the ground. In this step, as shown in FIG. 7B, the hydraulic motor or the like of the rotation driving means of the feeding means 3 is rotated in the normal direction, the board 5 is pulled to extend the telescopic member 4 to a predetermined length, and in synchronization therewith. The drilling fluid is sprayed from the spray nozzle 8 to assist the drilling. Subsequently, when the expansion / contraction member 4 is extended by a target distance, the expansion / contraction member 4 is contracted by reversing the hydraulic motor or the like as shown in (c), and the supply of the drilling fluid to the injection nozzle 8 is stopped. This time, the backfilling fluid is ejected from the ejection nozzle 8. In this structure, as described above, when the telescopic member 4 is contracted to reach the storage position that is almost accommodated in the housing 37, the feeding hydraulic motor and the like are automatically stopped, and the board 5 is left and built in the ground. . In synchronization with this, the supply of the backfill fluid is stopped (ST7 to ST14 in FIG. 6). If the ground to be excavated is soft or the soil is disturbed by the high-pressure injection of the excavating fluid and the anchoring effect of the anchor 7A is not effective, the winding of the telescopic member 4 or the link coupling bodies 4A and 4B is difficult. The program setting may be performed so that the take-up operation is performed slowly and / or the timer process is performed to perform the take-up operation after a predetermined time has elapsed.

  Next, the guide member 2 is lifted via the movable support 12 by reversely driving the lifting motor of the lifting mechanism 13 and moved to the rising position on the ground surface side as shown in FIG. At that time, the backfilling fluid is sent from the supply pipe 22 to the spray nozzle provided in the vicinity of the excavating blade 26 via the pipe line 18 and the swivel 15 and sprayed. This injection is automatically stopped when the guide member 2 reaches the raised position. At the same time, the lifting motor is also stopped (ST17 to ST19 in FIG. 6).

  Next, as shown in FIG. 1A, a cutting process is performed on the ground surface side to cut off the board side drawn from the board reel 6 serving as a board supply means. In this step, a portion of the board 5 drawn from the opening 45a of the combined body 45 is cut by a cutting means such as a cutter, and is cut off from the board side drawn from the board reel 6 (ST20 in FIG. 6). ). When the next boat 5 is subsequently built, a connecting step of releasably connecting the front end side of the board 5 via the anchor 7A to the front end combined body 45 of the elastic member 4 is performed.

  In the horizontal erection method as described above, after the guide member 2 has been inserted through the board 5 to a predetermined depth in the ground, the board 5 is horizontally erected, left in the ground, and the board 5 is detached. The horizontal installation of the board 5 is completed. For this reason, in this method, for example, it is possible to quickly build even a difficult place such as directly under a structure, thereby draining the ground fluid to the ground surface and improving the ground drain or similar. In addition, the application opportunities of the ground injection method for injecting an injection material such as a chemical solution as described below into the ground gap or a similar method can be expanded. Of course, in this horizontal erection method, the excavating fluid is jetted from the jet nozzle 8 so that the extension operation of the telescopic member 4 by the feeding means 3 can be performed more stably and quickly, and the load can be reduced. Further, in this horizontal erection method, the guide member 2 can erection of the board 5 simultaneously with the excavation of the vertical hole by the excavation means 25, so that the construction cycle can be greatly shortened.

(Example of Ground Improvement) Next, an example of ground improvement using the board 5 left in the ground will be described with reference to FIGS. In this example, as shown in FIG. 5, the distribution head 55 is fitted and attached to the ground-side protruding end 5 a of the board 5. The head 55 has a number of hoses 56 into which the lower portions 56 a are inserted into a plurality of long holes 50 formed in the board 5. For this reason, in this example, if each hose 56 is connected to the supply side of a chemical injection plant (not shown) with the head 55 attached to the upper end 5a of the board, and a chemical or similar liquid is pumped, FIG. As shown in FIG. 8B and FIG. 8A, a chemical solution or the like is discharged from the injection port 53 provided on the front and back surfaces or both side surfaces of the board 5 into the gap between the surrounding ground and penetrates into the cavity B and the surrounding ground of the board 5. The ground can be improved by solidifying or improving the liquid. FIG. 8B is an example in which the inlet is provided only on one or one side of the front and back surfaces of the boat 2. In this case, it becomes easier to discharge a chemical solution or a similar solution to a distance as much as the number of injection ports decreases. FIG. 8C is an example of liquefaction countermeasures for ground improvement. By adjusting the pressure and time of injection of the liquefaction countermeasure fluid from the multiple injection ports 53 provided on the front and back surfaces of the board 5. The structure immediately below the structure A is continuously improved.

  Of course, the board 5 left in the above-mentioned ground naturally discharges ground fluid (moisture, waste liquid, etc.) to the ground surface through the long holes 50 of the board 5 in addition to the usage examples of FIGS. 5 and 8. Or, it is possible to apply a vertical drain method that improves the ground by suctioning and forcibly discharging, or a similar method. Furthermore, as a method of use, for example, the board 5 left in the ground is used as a drain material, and the water in the ground is drained to the surface side, and then the work of injecting the chemical into the ground through the same board 5 is performed alternately. is there.

(Modification 1) FIG. 9 shows a modification 1 of the horizontal erection device, and FIGS. 9A and 9B show aspects corresponding to FIGS. 7B and 7C. In this description, the same or similar members and places as those in the above embodiment are denoted by the same reference numerals, the redundant description is omitted, and detailed description will be made focusing on the changed points.

  The change 1 is that the guide member 2 does not have the excavation means 25 described above. That is, in this horizontal erection device 9, in the above-described guide member erection process, after excavating a vertical hole in the ground in advance, the guide member 2 is inserted into the vertical hole and supported in a stationary state in the vertical hole. become. Therefore, the guide member 2 is provided with a simple excavation blade 26A at the lower end, and can be positioned so as not to move carelessly toward the bottom surface side of the vertical hole by the excavation blade 26A. This advantage is that the entire configuration can be simplified without using a complicated and expensive device as shown in FIG. 1 as a suspension device used for inserting and arranging the guide member 2 in the vertical hole.

  The change 2 is that, instead of the above-described feeding means 3, a telescopic or telescopic structure in which similar hollow cylinders are incorporated in the order of size as shown in FIG. 9A is adopted. is there. In this example, as the elastic member 4C, a second mast 51 is arranged on the base mast 50, a third mast 52 is arranged on the second mast 51, and a top mast 53 is arranged on the third mast 52 so as to be extensible. The base mast 50 is fixed to a support base 35 provided in the housing 37. A combined body 45 </ b> A corresponding to the combined body 45 is attached to the tip of the top mast 53. The structure corresponding to the feeding means 3 includes, for example, a plurality of hydraulic cylinders or a combination of a sheave and a wire that is connected to a plurality of hydraulic cylinders and applies a tensile force to each of the masts 51 to 53. However, any other structure may be used as long as it is a telescopic structure. As an example, there is a structure in which a plurality of cylindrical members are arranged in a nested manner, and each cylindrical member is expanded or contracted by a “zip chain lifter” (registered trademark) or a similar structure incorporated in the cylinder.

  The change point 3 is a configuration in which the feeding means or the elastic member 4C is a pair arranged at intervals corresponding to the width of the flexible board 5 and the board 5 is pulled by each elastic member 4C. In this structure, as shown in the schematic view seen from the Y direction in FIG. 9A, a pair of housings 37 are juxtaposed in front of and behind the paper surface with respect to the distal end cylindrical portion of the guide member 2, The telescopic member 4 </ b> C built in the housing 37 can be expanded or contracted in conjunction with the masts 51 to 53 by a control signal from the ground surface side, and the tip 5 b of the board 5 extends along the guide member 2. After being pulled downward, the direction is changed by approximately 90 degrees via a guide roller 37a provided between the casings 37 and the anchor 7B is attached, and the anchor 7B is attached to the board tip 5b. In the attached state, it has an engagement shaft portion 7c on both side surfaces, and on the combined body 45A attached to the distal end of the elastic member 4C (mast 53) in which the engagement shaft portions 7c on both sides are arranged on both sides. Can be released to a concave receiving part (not shown) It has been changed at the point which engages the.

  Here, the engaging shaft portion 7c and the concave receiving portion constitute the connecting means of the present invention, and are connected in a manner of engagement when the respective elastic members 4C (mast 53) are advanced as shown in FIG. 9A. When the board 5 is pulled on both sides and the respective elastic members 4C (mast 53) are contracted, the engagement is released by the anchor effect so that the board 5 can be left behind. In the first modification, the target board 5 can be pulled by the pair of feeding means 3 or each of the telescopic members 4C, so that the traction force can be increased and a quick and stable operation can be obtained.

(Modification 2) FIG. 10 shows a modification 2 of the horizontal erection device, and FIGS. 10 (a) and 10 (b) show aspects corresponding to FIGS. 9 (a) and 4 (a). In this description as well, the same or similar members and places as those in the above embodiment are denoted by the same reference numerals, redundant description is omitted, and changes are clarified.

  The change point 4 is an example in which the expansion / contraction member 4 </ b> D of the feeding means 3 is simplified while adopting the concept of the expansion / contraction member 4. In other words, the feeding means 3 is composed of a single link connection body in which a plurality of substantially box-shaped unit link members 58 are sequentially connected to each other using a hinge 59 as the elastic member 4D. Further, the link connecting body, that is, the expansion / contraction member 4D is lifted / lowered by the lifting / lowering driving means by the rack 58a and the pinion 132 provided in the unit link member 58, and supported by the distal end side of the guide member 2 in the lifting / lowering process. The direction is changed by approximately 90 degrees by the existing direction changing means 134.

  First, as shown in FIG. 10B, the unit link member 58 has a hollow portion through which the board 5, the supply pipe 23, and a long object similar to them can be inserted in the longitudinal direction. In addition, the unit ring members 58 adjacent to each other are connected to each other at their opposite ends via hinges 59, maintain a linear state in a horizontal state, and have one side hinged to the other side. A link coupling body, that is, a telescopic member 4D, which cannot be bent downward through 59 and can only be bent upward is configured.

  In other words, the unit link member 58 includes, on the lower surface, one pivot portion 59a provided at the connection side edge portion of one end surface, the other pivot portion 59b provided at the connection side edge portion of the other end surface, and the lower surface. Thus, it has a rack 58a provided in the front-rear direction of the middle part. The unit link member 58 has a size that allows the board 5 and the supply pipe 23 to be inserted with a margin. Further, the one pivotal support part 59a and the other pivotal support part 59b constitute a hinge 59 together with the shaft 59c, and penetrate through and form a connection hole having substantially the same diameter.

  The unit link members 58 described above are rotatably connected to the one pivotal support part 59a and the other pivotal support part 59b that are arranged linearly with the pins or shafts 59c being inserted through the respective coupling holes. For this reason, in this structure, each unit link member 58 has a straight mode in which the end surfaces are in contact with each other, and a bent mode in which the non-connected side, that is, the side not connected by the hinge 59, rotates away from the hinge 59 as a fulcrum. In a substantially horizontal state in which the hinge 59 is arranged on the upper side as shown in FIG. 10B, the straight state is maintained by its own weight, and an integrated rigid body state is obtained.

  The elevating drive means 134 elevates and lowers the extendable member 4D along the guide member 2 by a rack and pinion mechanism. However, the elevating drive means 134 may be raised and lowered by a hydraulic telescopic type or a wiring type instead of the rack and pinion mechanism. In this example, the pinion 132 is held with respect to the reader 10 of FIG. 1 via a bracket 135 or the like, so that the rotation drive unit for the drive shaft 133 can be arranged relatively easily. However, you may make it provide the pinion 132 and the rotation drive part in the housing | casing 137 of the direction conversion means 134, for example.

  The direction changing means 134 changes each corresponding unit link member 58 from the vertical direction to the substantially horizontal direction and from the horizontal direction to the vertical direction on the distal end side of the guide member 2 in the process of raising and lowering the extendable member 4D. 2 is provided in a housing 134 supported around the distal end side. The casing 137 is provided on the upper wall of the casing, and the opening 137a that guides the elastic member 4D into the casing 137. The distal end side of the elastic member 4D that is provided on the one side wall of the casing and guided from the opening 137a. And an opening 137b for guiding the outside to the outside. And in the housing | casing 137, the guide groove part 136 which is provided between the opening 137a and the opening 137b and guides the front end side of the expansion-contraction member 4D from the vertical direction to the horizontal direction is provided. The guide groove 136 is provided between the first bent wall 138 and the second bent wall 139 and is bent at a predetermined curvature. However, as this guide structure, instead of the guide groove 136, for example, a guide roller and a sandwiching roller can be used, and the direction can be changed by extending the elastic member 4D along the curved surface of the guide roller. It is.

  The combined body 45B has a flat rectangular shape that penetrates back and forth through an internal cavity, the front end side is an opening 45a as a rectangular doorway through which the board 5 is inserted, and the rear end side is the link connection body, that is, the front end of the elastic member 4D. The unit link member 58 is connected. The combined body 45B has a lower surface formed in a flat surface and an upper surface formed in an inclined surface gradually inclined toward the lower surface side toward the tip. This is because, for example, in the process in which the elastic member 4D is disposed in a substantially horizontal direction from a predetermined depth in the ground, the horizontal mode is reliably maintained by receiving the downward load (F) due to the presence of the inclined surface, and thus inadvertent. Do not bend it.

  The injection nozzle 8 is disposed on both sides of the combined body 45 </ b> B so that its injection port faces forward, and is fixed via a bracket 47. The rear end of each injection nozzle 8 is inserted into the combined body 45B. And the front-end | tip of the above-mentioned supply pipe 23 piped along the inside of the expansion-contraction member 4D is connected to the rear end of each injection nozzle 8 via the bifurcated joint. However, in this structure, the board 5 and the supply pipe 23 are arranged along the elastic member 4D. For example, the board 5 is arranged along the outer surface of the elastic member 4D, particularly the lower surface in the horizontal state of the elastic member 4D. It is also possible to do.

  In addition, the above form and modification do not restrict | limit this invention at all. The present invention only needs to include technical elements specified in the claims, and the details can be variously changed as necessary. For example, the shape of the combined body or unit link member may be further modified with reference to the above configuration example, or the configuration disclosed in Japanese Patent No. 4136905 or a similar configuration may be adopted as the hinge between the unit link members. It may be.

  In the present invention, for example, the configuration of “substantially vertical” is not strict and includes an aspect having a slight gradient, and the configuration of “substantially horizontal” includes an aspect having a slight inclination. included.

1 ... Base machine (10 is leader, 11 is guide sheave)
2 ... Guide member (20 is an inner cylinder, 21 is an outer cylinder)
3 .... Feeding means (35 is a support base, 37 is a housing)
4 ... Expandable members (links)
4C ... telescopic member (50-53 is mast)
4A ... 1st link coupling body 4B ... 2nd link coupling body 4D ... Expansion-contraction member (link coupling body)
5 .... Flexible board 6 .... Board reel 7A ... Anchor (composing connecting means, 7a and 7b are mounting holes)
7B... Anchor (composing connecting means, 7c is an engaging shaft portion)
8... Injection nozzle 9... Horizontal board mounting device 13... Elevating mechanism 14... Rotating mechanism 15 ... Swivel 16 ... Guide tool 17 ... Guide tool 18.・ Pipe for transferring excavation or backfilling fluid 19 ... hydraulic oil pipeline (introduction and discharge)
22 ... supply pipe 23 ... supply pipe 24 ... hose 25 ... excavation means (26 is an excavation blade, 27 is a rotation prevention plate, 28 is a stirring blade)
30 ... Rotating body 41 ... Unit link member (42 is a hinge, 43 is an engaging recess)
58 ... Unit link member (59 is hinge)

Claims (10)

A flexible board capable of discharging the fluid in the ground to the ground surface and / or discharging the injection material into the ground is used when installing in a substantially horizontal direction from a predetermined depth in the ground,
A guide member that penetrates in the vertical direction from the ground side into the ground and is pulled out;
A feeding means which is provided in a state supported by the guide member, and drives the expansion / contraction member to extend and contract from the periphery of the front end side of the guide member toward the substantially horizontal direction in the ground;
A connecting means for releasably connecting the front end side of the board drawn from the surface side along the guide member to the front end side of the elastic member;
A horizontal erection device for a board, wherein the board is pulled by the expansion / contraction member when the expansion / contraction member is extended, and is left in the ground when the expansion / contraction member is reduced.   It has an injection nozzle provided on the distal end side of the telescopic member, and a fluid transfer supply pipe that is drawn from the surface side along the guide member and has a distal end connected to the injection nozzle. The board horizontal mounting apparatus according to claim 1.   The telescopic member has flexibility, and is integrally joined by the feeding operation of the feeding means and rigidized while sequentially extending in the feeding direction, and is divided or folded into the storage space by the shrinking operation of the feeding means. 3. The board horizontal erection device according to claim 1 or 2, comprising a pair of link links that fits.   4. The board according to claim 3, wherein, when the elastic member is formed by coupling the link connectors, a hollow portion is formed inside the elastic member so that a long object such as the board can be inserted in the longitudinal direction. Horizontal erection device.   The expansion / contraction member uses a unit link member having a hollow portion through which a long object such as the board can be inserted in the longitudinal direction, and the unit ring members are connected to each other through hinges at opposite ends. 3. A link coupling body that maintains a straight line shape in a horizontal state and can be bent only upward in one direction with respect to the other side via the hinge portion. Board horizontal erection device.   The board according to any one of claims 1 to 5, wherein the feeding means or the elastic member is composed of a pair arranged at a predetermined interval, and the board is pulled together by the elastic members. Horizontal erection device. A horizontal erection method in which a flexible board capable of discharging the fluid in the ground to the ground surface and / or discharging the injected material into the ground is installed substantially horizontally in the ground from a predetermined depth of the ground,
A connecting step of extending and retracting the extendable member in a substantially horizontal direction by a feeding means provided around the tip of the ground penetration guide member, and releasably connecting the built-up tip of the board to the tip side of the extendable member When,
A guide member positioning step for penetrating and arranging the guide member to a predetermined depth in the ground;
A board leaving step of drawing the board by the feeding means to extend the elastic member to a predetermined length, and then releasing the connection by reducing the elastic member to leave the board in the ground;
A board horizontal erection method, wherein the board has a cutting step of cutting off the ground-side protruding end of the board from the board supply means.   8. The horizontal erection method for a board according to claim 7, wherein the drilling fluid is ejected from an ejection nozzle provided on a distal end side of the telescopic member in the extension process of the telescopic member.   9. The method of horizontally laying a board according to claim 7 or 8, wherein, in the guide member positioning step, the guide member is inserted and positioned in a vertically excavated vertical hole.   9. In the guide member positioning step, the excavating means is rotated by a rotating means to excavate the ground to create a vertical hole, and at the same time, the guide member is positioned in the vertical hole. The horizontal mounting method of the described board.

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