JP2019044574A - Method for embedding sheet pile - Google Patents

Abstract

To provide a method for embedding a sheet pile which embeds a sheet pile after preliminary excavation using a plurality of augers by a simple method.SOLUTION: A method for embedding a sheet pile includes: providing an embedded reference line 1 on the ground at a position where a sheet pile 6 is embedded; embedding a plurality of augers 2 and 3 in the ground at a position where the augers are adjacent to each other, on the embedded reference line 1; pulling out the auger 2 embedded on one end side of the embedded reference line 1 to the ground; embedding the auger 2 to a position adjacent to the auger 3 on the embedded reference line 1 again; then pulling out the auger 3 to the ground, and embedding the auger 3 to a position adjacent to the auger 2 on the embedded reference line 1 again; forming a sheet pile embedded region 7; vertically installing the sheet pile 6 in the sheet pile embedded region 7; and weighting the sheet pile to embed the sheet pile.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method of burying a sheet pile and a trench pile (hereinafter, collectively referred to as "sheet pile" in the present specification) used for revetment work and pile protection, in particular, using an auger in advance. The present invention also relates to a sheet pile embedding method for embedding a sheet pile later.

  Sheet piles are long, narrow, plate-like piles that are driven into the ground before construction for the purpose of retaining the earth and water. As a method of burying a sheet pile conventionally, for example, a sheet pile is fixed to a shaking machine using a vibro hammer provided on a large civil engineering machine, and the sheet pile is buried in the ground using the vibration. There are methods such as a method, and a method of burying in the ground using a large hydraulic device etc. (prior art 1 and 2).

Japanese Patent Application Publication No. 08-170332 Japanese Patent Application Laid-Open No. 10-195875

  The sheet pile burial method using the above-mentioned vibro-hammer, the vibration and the sound are severe at the time of construction, if it is used in the town, the problem of the noise and the vibration will occur, and it goes against the flow of emphasis on living environment consideration in recent years It was necessary to take sufficient noise and vibration measures separately.

  Also, of course, even with the use of a vibro hammer, it is considered that it is necessary to use a large-sized device to bury the sheet pile even if it is a sheet pile burying method by hydraulic pressure. In the construction work, construction could not be done unless the road was closed. In particular, sheet piles are used to prevent flooding of rivers as described above, and will be buried in the dikes of the rivers, but the upper part (top part) of the dikes of the rivers is wider than the roads. Sheet pile burying work in a narrow place is extremely difficult, as it may not be possible to bury the sheet pile by placing on a dike a civil engineering machine that is narrow and provided with a large hydraulic system and a vibro hammer. The

  The inventor recalled that the sheet pile is embedded using a small device instead of using a large device such as a vibro-hammer type or hydraulic type, but even in this case, the following problems arise It went up.

  For example, when a sheet pile is embedded using a small apparatus, the small apparatus does not have small power and can not directly embed the sheet pile into hard ground by press-fitting, so usually augers etc. are embedded before embedding the sheet pile. It is conceivable to carry out a prior digging using the provided boring machine. With this advance moat, after digging in the ground where the sheet pile is to be buried in advance using an auger, the auger is pulled out to make a hole in the nearby ground, or the soil is returned, and the same place is shifted and the same. By repeating the work, while making a hole in the position to embed the sheet pile by drilling a large number of holes in the ground, the condition of the soil in the ground is kept soft, and the embedding of the sheet pile thereafter is performed by It is a construction method to realize with such a small power device. The inventor repeatedly conducted the preceding moat and conducted thorough investigations on a method of properly embedding the sheet pile, and obtained the following results.

  First, when using the auger to drill the first hole in the ground, the hardness of the soil in the ground is generally uniform, so using the auger allows holes to be drilled vertically in the ground, The soil of the portion excavated by the auger is excavated, and when the excavated portion is bored or the soil is returned, the soil of the surrounding area 7 becomes soft. However, since the auger has the property of rotating and digging so as to push it from above, if there is a hard layer and a soft layer in the ground, the digging tends to proceed in the direction of the soft layer. For example, when trying to open the second hole near the first hole using one auger, as shown in FIG. 17 (a), the vicinity of the first hole 7a is excavated by drilling Due to the soft layer, in the second drilling, the auger 2 advances to incline in the direction of the first hole 7a which is the soft layer, and the second hole is drilled in the desired position. I could not Also, in order to avoid this, in the third and fourth drillings, the holes were spaced from each other. In this case, the holes 7b and 7c can be opened vertically because the distance is wide. However, as shown in FIG. 17 (b), looking at the entire underground, the area around the auger excavated area, ie, the part where the holes are drilled, is a soft layer, but The hard layer (black portion in FIG. 17 (b)) remains in the opened portion, and the hard layer and the soft layer alternate in the ground. As described above, in the underground condition where hardness is not uniform, even if it is attempted to embed the sheet pile using a small device, the power is small, and the hard layer prevents the sheet pile from being embedded, and the sheet pile is desired. It could not be buried at the location.

  However, the present inventor changes the idea based on the above verification results, and when embedding the sheet pile, all the soil at the position where the sheet pile is embedded is a soft layer, that is, the underground of the portion in which the sheet pile is embedded. Even if all soil is in a soft state, sheet piles can be buried using small devices without using large devices used in hydraulic or vibro hammer methods. I noticed.

  Furthermore, according to the inventors of the present invention, in the previous digging using a single auger, the digging is carried out with markings so that the depth to be drilled can be grasped in the prior digging using one auger. And, the mark attached to the auger disappears due to contact with the soil, etc. After that, it is necessary to dig by relying on the skill of the expert, and if it is done several times, it is necessary to dig a little deeper with extra margin, ie extra moat It becomes. However, if it is attempted to bury interlocked sheet piles sequentially in such an overcut state, the sheet piles to be embedded in the area excavated later are only by the amount that is overcut compared to the beginning. It was noticed that there is a problem that the sheet piles sink more than the previously embedded sheet piles, the heights of the sheet piles become uneven, and the connected sheet piles can not be connected at the same height.

  An object of the present invention is to provide a sheet pile embedding method for embedding a sheet pile after advance digging using a plurality of augers by a simple method.

  In order to achieve the above object, according to the sheet pile embedding method of the present invention, (1) an embedded reference line is provided on the ground at a position where the sheet pile is embedded, and (2) a plurality of augers are approached on the embedded reference line. (3) Pull one auger buried at one end of the buried reference line to the ground, and place the auger on the buried reference line near the other buried augers. Forming the sheet pile embedded area by re-embedding the one auger, and (4) performing the work of (3) a plurality of times, (5) erecting the sheet pile in the sheet pile embedded area, and applying a load It is characterized by giving and burying.

  In the sheet pile burying method according to the present invention, in (2), one auger provided with a scraping mechanism consisting of an iron rod on the outer peripheral surface of the steel pipe and the other not provided with a scraping mechanism on the outer peripheral surface of the steel pipe It is characterized in that it is buried alternately with an auger.

  In the sheet pile burying method according to the present invention, the other auger is characterized in that a thin iron plate is wound around the outer peripheral surface thereof.

  The sheet pile burying method according to the present invention is characterized in that in (2), the scraping mechanism is provided around the steel pipe and the auger is provided around the scraping mechanism using the auger. I assume.

  In the sheet pile burying method according to the present invention, in (3) and (4), a contact preventing jig is disposed at a position in contact with the other augers being buried, and one auger is buried.

  In the sheet pile embedding method according to the present invention, a construction machine having a boom whose tip position can be moved in three dimensions, a rotary drive mechanism having a vertical rotation axis suspended at the tip of the boom, and the rotary drive mechanism An auger and / or a sheet pile using a sheet pile embedding device provided under a rotating shaft and having an attachment for releasably engaging an auger and / or a sheet pile embedding tool for clamping a sheet pile It is characterized by being buried.

  In the sheet pile embedding method according to the present invention, the tip end of the boom is provided with a tip having a pressing portion and a hook, and the pressing portion of the tip is pressed against the sheet pile and the sheet pile is embedded by applying a load. It is characterized by

  In the sheet pile embedding method according to the present invention, the attachment has a cylindrical outer shape, a through hole is provided on the outer peripheral surface thereof, and the sheet pile embedding tool has a cylindrical outer shape smaller than the outer shape of the attachment. And a through hole having substantially the same size as the through hole of the attachment is provided on the outer peripheral surface thereof, and the sheet pile embedding tool and the attachment are engaged via the respective through holes. Do.

  In the sheet pile embedding method according to the present invention, the sheet pile embedding tool has two grooves facing each other at the lower end portion of the outer peripheral surface, and has a fixing portion for fixing the sheet pile to the inner surface of the lower end portion. The sheet pile is inserted into the two grooves and fixed by a fixing portion to embed the sheet pile.

  In the sheet pile embedding method according to the present invention, a plurality of sheet pile embedding apparatuses are used, the above (1) to (4) are performed using one sheet pile embedding apparatus, and the above ((4) using the other sheet pile embedding apparatus) 5) to do.

  In the sheet pile burying method according to the present invention, the sheet pile burying method is used to feed and bury the sheet pile at the top end of the river embankment, and the sheet pile is used as a foundation pile for reinforcement and raising of the embankment. It is characterized by

  In the present invention, after a plurality of augers are used and the plurality of augers are temporarily buried at a close position on the buried reference line, one of the buried augers is one auger buried at one end of the buried reference line. Withdrawing and re-embedding adjacent to the other augers being buried and repeating this operation, drilling a hole in the ground where the sheet pile is to be buried and making the soil around the hole soft. It is possible to use a small burial device to facilitate sheet pile burial that can be buried only with the construction of noise and vibration pollution, such as vibro hammer, and large hydraulic equipment machines. It becomes possible. Further, in the present invention, since the drilling is alternately performed using at least two augers, when the augers to be buried later are to be buried near the previously buried augers, a part of the augers comes out on the ground. This makes it possible to embed the auger behind the auger while looking at the mark, so that the height of the sheet pile can be kept the same without the need for extra digging.

  In addition, the auger is often provided with a scraping mechanism consisting of a spiral blade or the like for transporting the excavated soil to the ground on the outer peripheral surface of the steel pipe. If it is attempted to bury them side by side, there is a risk that the auger scraping mechanisms may be intertwined, and the augers can not be juxtaposed and buryed in a close position. However, according to the present invention, since the auger provided with the scraping mechanism and the auger not provided with the scraping mechanism are alternately embedded, there is no entanglement between the scraping mechanisms, and the auger is embedded at a close position. It is possible to form the sheet pile embedded area as a soft layer. Furthermore, if a plurality of augers provided with an anti-entanglement mechanism are used for excavation, the auger may be excavated while being rotated with a second auger at a position next to the first auger embedded first. The augers can be embedded in the desired close position without intertwining each other.

  In the method according to the present invention, by embedding the auger using the contact prevention jig, it becomes possible to easily position the auger, and it is possible to sequentially embed at a fixed interval, and The state can be a more even soft layer.

  In the method according to the present invention, by using a sheet pile burying device capable of engaging an auger and a sheet pile burying tool with a simple structure through an attachment or devising the structure, it is possible to further reduce the size of the mini shovel etc. By embedding the sheet pile using a suitable jig, the sheet pile can be embedded by a small machine, and the sheet pile can be easily embedded at a desired position. In addition, when a part of sheet pile burial remains high due to an obstacle etc. in the ground, the treatment such as monken placement as described in utility model registration (Registration No. 3199718) is carried out and burried in a desired position. It is possible to

Explanatory drawing showing an example of the sheet pile embedding method according to the present invention Explanatory drawing showing an example of the sheet pile embedding method according to the present invention Explanatory drawing showing an example of the sheet pile embedding method according to the present invention The perspective view of the contact prevention jig used for the sheet pile embedding method by this invention, and the side view explaining a use condition Side view showing a configuration of an example of a sheet pile embedding device used for a sheet pile embedding method according to the present invention Side view showing another configuration of a sheet pile embedding device used for a sheet pile embedding method according to the present invention The perspective view showing the composition of an example of the tip tool used for the sheet pile embedding method by the present invention The perspective view which shows the other structure of the tip tool used for the sheet pile embedding | flush-mounting method by this invention A six view showing a configuration of an example of an attachment used for a sheet pile embedding method according to the present invention A six-sided view showing a configuration of an example of a sheet pile embedding tool used for a sheet pile embedding method according to the present invention The front view which shows the structure of an example of the auger used for the sheet pile embedding | flush-mounting method by this invention The perspective view which shows the structure of another example of the auger used for the sheet pile embedding | flush-mounting method by this invention Explanatory drawing which shows the other example of the sheet pile embedding | flush-mounting method by this invention. A six-sided view showing the configuration of an example of the underground press-in tool used for the sheet pile embedding method according to the present invention Explanatory drawing which shows the other example of the sheet pile embedding | flush-mounting method by this invention. Explanatory drawing which shows the other example of the sheet pile embedding | flush-mounting method by this invention. Explanatory drawing explaining the problem of the prior art of this invention

  1 to 3 show an embodiment of a sheet pile embedding method according to the present invention.

  As shown in FIG. 1, a buried reference line 1 is provided which indicates the position where the sheet pile is to be buried in advance in the ground. With the buried reference line 1, a line etc. is drawn in advance to the ground at the position where the sheet pile is to be buried, and along the buried reference line, thereafter, the auger 2 and 3 are used alternately to repeat the embedding and drawing operations. This is a mark for advancing drilling, and is provided, for example, by drawing a white line on the ground portion or scraping the ground on the ground. However, the present invention is not limited to this, and any method may be used as long as the position where the sheet pile is embedded can be viewed from the ground.

  As shown in FIG. 2A, the auger 2 is excavated to a predetermined depth while rotating the auger 2 to one end side of the embedded reference line 1 using the sheet pile embedding device 4 etc. shown in FIG. Once buried in the After the auger 2 is removed from the embedding device 4, the auger 3 different from the auger 2 is connected to the embedding device, and is rotated along the embedded reference line 1 to a position close to the already embedded auger 2. Drill to depth and bury in the ground. Since the upper end of the auger 2 is exposed to the ground when the auger 3 is buried, the height of the sheet pile can be kept the same if the same depth as that of the auger 2 is buried with the auger 2 as a mark. Thereafter, even when the auger is buried, the depth can be made constant by embedding the auger buried next to the place to be buried in the mark.

  The number of augers to be buried is two or more depending on the type of sheet pile to be buried later, the condition of the site, and the like. Since the sheet pile has several sizes and several thicknesses and widths, the diameter, number, and length of the auger are appropriately selected according to the type of sheet pile. For example, in the case of using three augers, after auger 2 is buried as described above and auger 3 is buried in the ground, auger 3 is removed from burial apparatus 4 and a third auger is connected, and then a buried reference line The third auger is embedded in the vicinity of the auger 3 already embedded along the. Furthermore, when the number of augers is increased, the same procedure is followed.

  Further, after the auger 2 is embedded, when the auger 3 is embedded, if the contact preventing jig 5 is used, it becomes possible to more easily position the augers 2 and 3 embedded in parallel, It can be embedded at intervals.

  As shown in FIG. 4 (a), the contact prevention jig 5 is curved according to the diameter of the auger between the two pile portions 51 for embedding and fixing on the ground and the two pile portions. A semi-circular main body 52 and an adjustment plate 53 for adjusting the auger spacing are provided at the lower end of the main body. The contact prevention jig is not limited to this shape, and the number of adjustment plates may be increased, or the pile portion may not be provided, or various variations such as increasing the number of pile portions may be made. Is considered. In short, any shape can be used as long as the auger to be embedded can be adjusted at a constant interval.

  As a specific method of use, for example, as shown in the explanatory view of the state of use in FIG. 4 (b), one end of the adjusting plate 53 of the contact prevention jig 5 when the auger 3 is embedded after the auger 2 is embedded. Are placed along the buried reference line so as to be in contact with the auger 2, and the pile portion 51 is driven into the ground with a hammer or the like. Thereafter, the auger 3 is disposed above the curved portion of the semicircular arc-shaped main body 52, and then the auger 3 is embedded.

  After the auger 3 is embedded, the auger 3 is removed from the sheet pile embedding device 4 and the auger 2 already embedded at one end on the embedded reference line 1 is connected again to the sheet pile embedding device 4. The auger 2 is reconnected, and the auger 2 is pulled up to the ground by pulling the auger 2 to the ground by pulling the auger 2 out by rotating it in the reverse direction of the rotation direction when the rotary drive mechanism of the sheet pile embedding device 4 is buried. Then, the extracted auger 2 is further excavated to a predetermined depth using the sheet pile embedding device 4 at a position close to the auger 3 already embedded along the embedded reference line 1 and embedded again. After the auger 2 is buried again, the auger 3 is also pulled out to the ground by the sheet pile burial device 4 like the auger 2 and excavated to a predetermined depth at a position close to the auger 2 reburied along the buried reference line 1 Bury.

  By this alternating work, as shown in FIG. 2 (b), in the part where auger 2 and auger 3 were pulled out to the ground, the ground made of soil remaining in the hole and its surrounding is turned into soft ground, 7 can be formed, and the area 7 in the ground below the buried reference line 1 is hollow near the ground, and the deep area is an area formed of soft soil consisting of residual soil generated by excavation .

  In addition, after the auger 2 is buried again, the process may proceed to the next step without pulling out and re-burying the auger 3, or repeating the above operation, ie, two augers 2 and 3 along the buried reference line 1 Therefore, the work may be repeated alternately and repeatedly. When three or more augers are used, all the augers are temporarily buried as described in (2) above, and then one auger at one end of the buried reference line is pulled out, and along the buried reference line 1 Re-embedded in the adjacent position of other augers being buried. Furthermore, by sequentially repeating drawing and embedding one by one along the embedded reference line 1, the region 7 formed of a soft layer can be formed widely.

  Then, as shown in FIG. 3, the sheet pile 6 is lifted using the sheet pile embedding device 4 used for embedding the auger or another small embedding device, and placed at a desired position on the embedding reference line 1. Then, the sheet pile 6 is built and embedded by a method such as press fitting.

  After the sheet pile 6 is embedded, the auger 2 and the auger 3 are pulled out along the embedded reference line 1, and the sheet pile 6 is embedded to connect the sheet piles. In the case of the burying of two sheet piles, this is the end, but if the burying of the sheet pile is continued further, the augers 2 and 3 are buried and pulled out, and the burying of the sheet pile is repeated.

  As described above, in the present invention, by repeating the embedding and drawing of a plurality of augers, the area to be embedded in the sheet pile can be made into a soft soil state, and sheet piles can be easily made using a small embedding apparatus. It becomes possible to bury it. Also, when drilling using multiple augers alternately, the soil around the previously embedded augers is soft, and the second auger tries to move toward the soft soil, but the above augers are already embedded. Therefore, the auger that has already been buried can be prevented from shifting by contacting the buried auger and the auger can also perform the function of preventing slippage, and drilling can be performed at a closer position. In addition, since it is possible to embed at a more accurate position by using a contact prevention jig, and furthermore, another auger can be embedded with the auger embedded earlier as a mark, the depth of the hole in the sheet pile embedded area also becomes constant. It also becomes possible to easily embed the connected sheet piles and the like at the same height.

  Further, in the present invention, while pulling out one auger and re-burying it in a position close to the other auger, and while embedding and press-fitting the sheet pile, the other auger is in the ground. Being buried, the auger remaining in the ground keeps pushing the surface of the hole so as not to collapse the surface of the auger, forming a state of a mountain stay, and making the wall surface of the hole stable and unlikely to collapse, There is also a secondary effect that the holes in the sheet pile embedding area 7 are less broken than in the method in which the auger is pulled out immediately after excavating with one auger and the next hole is excavated.

  FIG. 5 shows a configuration of an example of a sheet pile burying apparatus used for digging with an auger of the sheet pile burying method according to the present invention or sheet pile burying. For example, as shown in FIG. 5, the sheet pile embedding device 4 has a power unit 12 having a boom 13 whose tip position can be moved in a three-dimensional direction, and a rotational drive having a vertical rotation axis suspended at the tip of the boom 13. The mechanism 14 and the augers 2 and 3 provided under the rotary shaft 15 of the rotary drive mechanism 14 for digging the ground in the ground and the sheet pile embedding tool 17 for holding the sheet pile 6 are detachably engaged. And an attachment 16.

  The sheet pile burying device 4 is, for example, a four-wheeled tire self-propelled truck as shown in FIG. 5, and a power unit 12 is mounted for burying an auger and / or a sheet pile in a bed portion thereof. In addition to the above, outriggers are provided near the four corners of the loading platform to stably hold the loading platform against the ground. Although what is shown in FIG. 5 uses a hole-piercing column vehicle, for example, a mini-excavator, shovel, other pile driving machine with leader, vehicle-type construction machine, mobile crane construction machine shown in FIG. It is also possible to use such vehicles, or to remodel and use these vehicles.

  The power unit 12 may be used as it is or modified as it is, such as a drilled column car, mini shovel, shovel, pile driving machine with leader, vehicle construction machine, mobile crane construction machine, etc. Good.

  The rotary drive mechanism 14 has a vertical rotation shaft 15 suspended at the tip of the boom 13, serves to rotate an auger mounted below the rotation shaft, and can use existing technology.

  As shown in FIGS. 5 and 6, the boom 13 is configured to be able to move in three dimensions what has been lifted by extension, swing, swing or the like. The boom 13 performs the positioning function of the augers 2 and 3 and the sheet pile 6 via the power unit 12. In addition, as shown in FIGS. 5 and 6, the boom 13 is connected to a tip end 18 having a pressing portion 81 which can press the sheet pile to the ground with a load.

  For example, as shown in FIG. 7, the tip end tool 18 has a pressing portion 81 of a flat iron plate at both ends, a connecting portion 82 with the boom near the center, and a power pole support portion 83 curved in an arc. Use the pole fixing jig that is attached to the drill car connected to the drill car via the. Further, as shown in FIG. 8, a pressing portion 81 inclined downward at the tip end is formed of an iron column provided with a hook 84 near the center, and a connecting portion 82 with the boom 13 is provided on the other end side. You may have. Using these, as shown in FIG. 3, the pressing portion 81 is brought into close contact with the upper end portion of the sheet pile 6 built in the sheet pile embedding area 7, the boom is operated, and the pressing portion 81 is directed to the ground The sheet pile 6 can be pushed into the ground and stably installed in the ground. The shape of the tip tool in FIGS. 7 and 8 is merely an example, and the present invention is not limited to this, and it is possible to have an appropriate shape.

  If the hooks 84 are provided as the end tool 18, the sheet pile can be moved and built up to the position where the sheet pile is embedded by lifting the sheet pile 6 and operating the boom. The shape of the hook 84 can be selected as appropriate.

  The pressing portion 81 lifts the sheet pile 6 and temporarily embeds the sheet pile 6 in a desired position, and then adjusts the position of the sheet pile 6 in the depth direction in the ground, and in the direction of the ground with respect to the sheet pile It is for applying a weight and pushing the sheet pile to a stable position in the ground. The load in the direction of the ground operates the boom 13 so that the pressing portion 81 is weighted in the direction of the ground. Further, the pressing portion 81 shown in FIG. 8 is provided at the tip end of the tip end tool 18 and is formed to be inclined downward. This is because the tip of the boom 13 is usually directed upward, but in such a state, it is inclined somewhat downward to load the sheet pile 6 downward (toward the ground). Further, by forming the pressing portion 81 by inclining the tip end tool 18 somewhat downward, it is possible to prevent the sheet pile from being detached from the pressing portion 81 when applying a load to the sheet pile 6. However, as long as the pressing portion 81 is a structure that can be given a weight in the direction of the ground, the pressing portion 81 may be provided at a place other than the tip, regardless of the structure.

  The attachment 16 is, as shown in FIGS. 5 and 6, attached to the lower end of the rotary shaft 15 of the rotary drive mechanism 14 and is formed of a hollow cylindrical steel pipe whose lower end is open. The augers 1 and 2 and the sheet pile burying tool 17 are selected to have an inside diameter such that they can be loosely fitted from below.

  The attachment 16 is provided with an engagement groove 61 for receiving an engagement projection projecting radially outward from the upper end circumferential surface of the augers 2 and 3 as the details of which are shown in a six-sided view in FIG. The engagement groove 61 is shaped to receive and engage the engagement convex portion of the auger, but is not limited to these shapes, and can take various shapes. In addition, in the attachment 16, in order to engage with the sheet pile embedding tool 17, two engagement holes 62 for tightening bolts with a nut are provided at opposite positions slightly above the center of the outer peripheral surface. . The upper end side of the attachment 16 has a connecting portion 63 whose diameter is larger than that of the lower end side so as to be able to connect with the rotating shaft 15, and is connected with the rotating shaft 15 via the connecting portion 63.

  The sheet pile embedding tool 17 engages with the attachment 16 and is used for press-fitting the sheet pile 6, and has an outer shape slightly smaller than the cylindrical inner peripheral surface of the attachment 16, and its six sides in FIG. As shown in the figure, the lower part has an open hollow cylindrical external shape, and in order to engage with the attachment 16, the bolt is tightened with a through nut at the opposite position above the center of the outer peripheral surface The engagement hole 71 of is provided. The engagement with the attachment 16 is made by aligning the peripheral surface of the attachment with the engagement holes 61 and 71 of the peripheral surface of the sheet pile embedding tool, and fixing the bolt with a nut or the like.

  Furthermore, two grooves 72 slightly wider than the width of the sheet pile are provided from the lower end of the sheet pile embedding tool 17 toward the center. The groove 72 is for sandwiching the sheet pile 6. Further, the two grooves 72 have a fixing device 73 for fixing the sheet pile sandwiched in the two grooves in the vicinity of the lower end in the vertical direction. For example, a vise can be considered as this fixing device, but any fixing device can be used as long as it can fix a sheet pile whose upper end is inserted in the groove 72.

  Augers 2 and 3 are used for advance digging and, as shown in FIG. 11, are made of steel pipe etc., and are provided with claws 21 (31) for digging on the tip end side (lower end side) or The outer circumferential surface of the steel pipe may be provided with a scraping mechanism 22 comprising a spiral blade or the like for scraping soil generated during excavation, and the outer diameter dimension of the steel pipe may be appropriately selected. can do. Further, the upper end portion of the auger has a cylindrical outer shape, and is provided with an engagement convex portion 23 (33) protruding radially outward from the upper end circumferential surface, and the engagement groove 61 of the attachment 16 Engaged with Besides, it is also possible to use an established auger.

  When selecting the shape of the auger, consider the shape that can be easily excavated, the shape that makes it difficult for soil to come out, and the auger that can keep the largest possible hole when the auger is pulled out. For example, as a shape which is easy to excavate, it is preferable that an excavating nail 21 (31) is provided on the tip end side (lower end side) or a scraping mechanism 22 on the outer peripheral surface is provided. In addition, the larger the scraping mechanism 22, the easier it is to excavate, and it is possible to form a hole having a larger shape by the scraping mechanism 22, but more soil remains. On the other hand, if the scraping mechanism 22 is made smaller, although the amount of residual soil is reduced, the digging speed is reduced and the size of the formed hole is also reduced. With regard to the size of the steel pipe, if it is thickened, the largest possible hole can be formed, but if the size of the steel pipe is thickened, power is required to rotate and excrete that much. The shape of the auger is appropriately selected according to the situation, in consideration of the various points as described above.

  In the present invention, since at least two augers are embedded in a position close to each other, it is further preferable to use those having a shape that does not interfere with each other in order to increase the effect of the present invention. Specifically, the first auger 2 is embedded at a position adjacent to a steel pipe as shown in FIG. 11 (a) provided with a scraping mechanism 22 consisting of an iron rod. It is desirable to use another auger 3 having no raking mechanism provided around a steel pipe as shown in FIG. 11 (b). Since the first auger 2 is provided with the scraping mechanism 22, it can be buried quickly and can be enlarged, while the second auger 3 approaches the first auger 2 However, the auger 3 is not provided with a scraping mechanism, so that even if the auger 3 contacts the scraping mechanism 22 of the auger 2, the augers are intertwined and the embedding of the auger 3 stops halfway It is possible to prevent the auger from being buried and to embed the auger at a closer position. Furthermore, the auger used in the present invention can make a large hole and make the residual soil difficult, the steel pipe is thick, and the scraping mechanism should use a scraping mechanism consisting of an iron rod to reduce its size. More desirable.

  In addition, if the auger 3 without the scraping mechanism is used, the problem is that the periphery of the auger is scraped and becomes thinner due to repeated use, and furthermore, the scraping mechanism of the auger's outer circumferential surface spirals to the circumferential surface Since it is formed in a shape, the outer peripheral surface is a convex convex surface, and when pulling out the auger, there is also a problem that the soil which has fallen from the wall surface falls into the hole. Therefore, for the second auger 3 which is not provided with the scraping mechanism, as shown in FIG. 11 (c), if iron plates 34 for preventing thinning are wound around several places on the circumferential surface of these, You can avoid the problem. Specifically, an iron plate 34 is wound around the circumferential surface of the auger 3, and the circumferential surface of the auger 3 and the steel plate 34 are welded to make a full turn, and the welding surface and the corner of the end of the steel plate 34 are processed smoothly. By providing the iron plate 34 in the auger 3, the area of the convex portion of the outer peripheral surface of the auger 3 is increased, so that when the auger 3 is pulled out while rotating, the plasterer coats the wall with cement to make a wall As a matter of course, the wall surface portion of the hole is leveled at the time of extraction, which makes it possible to prevent the hole from being broken.

  Furthermore, it is more preferable to use the augers 2 and 3 that are provided with an anti-entanglement mechanism around the scraping mechanism. For example, as shown in FIG. 12, the lower end of the steel pipe is provided with a claw 21 (31) for digging and a raking mechanism 22 (32) consisting of a spiral blade or the like on the outer peripheral surface. It is conceivable to use an entanglement preventing mechanism 25 (35) composed of a plurality of iron rods arranged in the vicinity so as to vertically penetrate each spiral blade, but it is not limited thereto. The shape and structure may be changed as appropriate. In this case, since any auger is provided with a scraping mechanism, a guard that prevents the auger from being entangled, that is, an anti-entanglement mechanism 25 (35) is provided while making it possible to rapidly form a large hole. As a result, even when another auger is embedded at a close position, it is possible to prevent the rip-off mechanism from being entangled by the entanglement preventing mechanism. In addition, the number, length, thickness, etc. of the entanglement preventing mechanism (guard) can be freely determined.

  The sheet pile 6 generally has a device for connecting the sheet piles at both ends, and when the sheet piles are embedded, the connection devices of the sheet piles to be embedded later in the connection device of the sheet pile embedded earlier are engaged. The sheet pile to be embedded later is pressed in and embedded by a sheet pile embedding machine. In addition, in the case of a sheet pile without a connecting device, those to be embedded later are arranged side by side in the sheet pile embedded first.

  The case where the present invention is implemented by repeating embedding and extraction one time each using two augers using the drill tower car 4 will be described. In addition, three or more augers may be used, and repeating of embedding and drawing may be performed a plurality of times, and vehicles other than a dug-and-post car may be used.

First, a white line is drawn on the ground at a position where the sheet pile is to be embedded, as the embedding reference line 1 for positioning in advance to embed the sheet pile. Thereafter, a drill car 4 as shown in FIG. 5 (a) is prepared near the buried reference line. The drill car 4 is attached with a rotary drive mechanism 14 having a vertical rotation shaft 15 suspended at the tip of the boom 13, and an attachment 16 as shown in FIG. 9 is attached to the lower end of the rotary drive mechanism. ing. Furthermore, a pressing portion 81 is attached to the tip of the boom.

  At the start of the work, the attachment 16 is provided with a digging claw 21 at its tip as shown in FIG. 11 (a), and an auger 2 made of a steel pipe having a blade 22 consisting of an iron rod spirally welded to the outer peripheral surface. Is engaged by inserting the engagement convex portion 23 at the upper end of the auger into the engagement groove 61 of the attachment 16. The boom 13 is operated to move the lower end of the auger 2 to one end side of the embedded reference line 1 and immediately above the position where the sheet pile is embedded, operate the rotary drive mechanism 14, rotate the auger 2, The claws provided at the tip start digging, digging to a predetermined depth, and embed the auger 2 in the ground.

  After the auger 2 is embedded, remove the engagement convex portion 23 of the auger 2 from the engagement groove 61 of the attachment 16 to prepare the contact preventing jig 5 shown in FIG. 4 and contact the adjusting plate 53 of the same jig with the auger 2 And the pile portion 51 of the same jig is driven into the ground. Next, the attachment 16 is provided with a digging claw 31 at its tip as shown in FIG. 11C, and no scraping mechanism is added to the periphery, and an iron plate 34 for preventing thinning and thinning on the outer peripheral portion The auger 3 made of welded steel pipe is engaged with the attachment 16 in the same manner as the auger 2 and operates the boom 13 so that the auger 3 is placed on the auger 2 already buried along the buried reference line 1 It moves close to the position where the outer periphery of the auger 3 fits in the wall surface of the main body 52 on the arc of the contact prevention jig 5. After that, drilling is performed to a predetermined depth in the same manner as the auger 2 is buried, the auger 3 is buried in the ground, and the state as shown in FIG. 2A is obtained. Further, as described above, the augers 2 and 3 may be provided with a scratching mechanism and a entanglement preventing mechanism (guard) as shown in FIG.

  After the auger 3 is embedded, the engagement convex portion 33 of the auger 3 is removed from the engagement groove 61 of the attachment 16 and the boom is operated to move the attachment 16 directly above the auger 2 already embedded. After the auger 2 is connected again, the auger 2 is pulled out to the ground by rotating it reversely as when the rotary drive mechanism is embedded.

  The adjustment plate 53 of the contact prevention jig 5 is in contact with the auger 3 and arranged again along the buried reference line 1, the pile portion 51 is driven into the ground, and the auger 2 in a state of being pulled up and suspended is placed on the buried reference line 1 The auger 3 is moved close to the already embedded auger 3 and moved to a position where the outer periphery of the auger 2 fits on the wall surface of the main body on the arc of the contact prevention jig 5 And re-bury auger 2 in the ground. Furthermore, in the same manner, the auger 3 is also pulled out to the ground, excavated to a predetermined depth at a position close to the auger 2 re-embedded along the buried reference line 1, and re-embedded. As a result of this work, a hole is formed in the part where auger 2 and auger 3 were pulled out to the ground (although part of the hole collapses during work), as shown in FIG. 2 (b), the buried reference line The ground below 1 becomes a sheet pile burial area 7 including soft soil without hard soil in the hole.

  A sheet pile burial area 7 is formed in the ground of the burial reference line 1, and after the internal soil is in a softened state, using hooks equipped on a dug-backed pillar car, flat laying on the construction site Lift the sheet pile 6 which is being used, operate the boom 13 and move it to the area 7 where the augers 2 and 3 have made holes on the same buried reference line 1, operate the boom 13 as shown in FIG. The sheet pile 6 is embedded in the area 7 and the hooks are removed from the sheet pile.

  Next, in order to stabilize the sheet pile 6, the boom 13 is operated to move the pressing portion 81 provided at the tip of the boom until it comes in contact with the upper end of the sheet pile 6, and the boom is moved toward the ground By moving, pressure in the ground direction is applied to the pressing portion, and the sheet pile 6 is pressed in via the pressing portion. Further, at the stage when the sheet pile 6 is carried into the ground and pressed in to a certain degree and enters a stable state, the engagement hole 62 provided on the outer peripheral surface of the attachment 16 and the outer peripheral surface of the sheet pile embedding tool 17 shown in FIG. The attachment 16 and the sheet pile burying tool 17 are engaged by inserting a bolt through the engagement hole 71 provided in and tightening with a nut.

  The vise 73 of the sheet pile embedding tool 17 is released, the upper end of the sheet pile 6 is sandwiched in the two grooves 72 on the lower end of the side of the sheet pile embedding tool, the sheet pile 6 is fixed by the vise 73, and the boom is operated. The pressure is further applied in the underground direction to further press-fit the sheet pile 6 to a desired depth.

  After the sheet pile 6 is embedded, the auger 2 and the auger 3 are further pulled out along the embedded reference line 1, and the sheet pile 6 is embedded in the same manner to connect the sheet piles. In the case of the embedding of two sheet piles, this is the end, but if the embedding of the sheet pile is continued further, the augers 2 and 3 are embedded and pulled out, and the embedding of the sheet pile is repeated.

  In the embodiment described above, when the sheet pile 6 is to be embedded, it is temporarily weighted by the pressing portion 81, and thereafter, the sheet pile embedding tool 17 is set to the attachment 16 and pressed into a predetermined position. Depending on the condition of the ground, etc., the burial method can be appropriately changed, for example, it can be weighted into the ground by the pressing portion 81, and can be press-fitted to a predetermined depth to the end without using the sheet pile burying tool 17 as it is .

  In the above-mentioned embodiment, although the method of using a drill pillar was used as sheet pile burial device 4 was explained, other devices may be used. For example, when using a shovel or mini shovel, as shown in FIG. 6 (a), the packet 19 at the tip of the boom is removed, and the rotary drive mechanism 14 and the attachment 16 for detachably engaging the auger are By connecting, it is possible to realize embedding and extraction of the auger. Furthermore, when press-fitting the sheet pile 6 using a mini shovel, as shown in FIG. 6 (b), the rotary drive mechanism 9 is fixed to the boom 13 by a rotating drive mechanism fixing tool 20 such as a wire or a clamp. It can move like a pendulum by the change of the angle of, and can prevent that trouble occurs in work. Furthermore, the distal end tool 18 having the pressing portion 81 and the hook 84 is connected to the tip of the boom, and the boom 13 is operated to stabilize the sheet pile 6 so that the pressing portion 81 contacts the upper end of the sheet pile 6 By moving the boom 13 in the ground direction, pressure in the ground direction is applied to the pressing portion 81, and the sheet pile 6 is press-fit through the pressing portion 81.

  Furthermore, when the sheet pile 6 is embedded by a mini-excavator or the like, as shown in FIG. 13, the bucket 19 may be attached to the tip of the boom 13 of the mini-excavator, and the sheet pile may be embedded by the bucket 19. However, since the tip shape of the bucket 19 is too large and the sheet pile 6 can not be pressed into the ground simply by pushing with the bucket, the following method is used in that case. Specifically, the sheet pile 6 is pressed with the bucket 19 and the press-fit of the sheet pile 6 is performed to the ground, and the bucket embedding tool 9 is placed on the upper end of the sheet pile 6 slightly exposed on the ground. Insert the claws 20 of the bucket 19 into the bucket burying tool 9, operate the boom, move the packet 19 in the ground direction, and press-fit the sheet pile into the ground.

  As illustrated in FIG. 14, the bucket embedding tool 9 has a shape in which the claws 20 of the bucket 1 can be inserted and the shape that can sandwich the sheet pile, and the pressure of the bucket 19 can be transmitted to the sheet pile , Shape does not matter. For example, as shown in FIG. 14, it has a bowl-shaped claw insertion portion 91 of a size having a capacity capable of containing the claws 20 of the bucket at the upper portion, and a clearance portion 92 at the lower portion which can sandwich the sheet pile. The claw insertion portion 91 is provided with a connection hole 93 for passing a wire or the like, and the gap portion 92 is also provided with an engagement hole 94 for engagement with the sheet pile. In the bucket embedding tool of FIG. 14, the sheet pile is embedded in the ground by sandwiching the upper end of the sheet pile located in the ground thread in the clearance 92 and further loading by the bucket 19, but the bucket embedding tool is also included. Some of the buildings are buried in the ground. However, if a wire, for example, is passed through the connection hole 93 in advance, the bucket burying tool partially embedded in the ground can be taken out by pulling the wire. Furthermore, a hole is made in the upper part of the sheet pile 6, the engagement hole 94 of the clearance of the bucket embedding tool is aligned, the pin or bolt is inserted, and the wire is passed through the connection hole 93 and the wire is hooked. When the boom of the mini-excavator is raised, the sheet pile 6 that failed to be buried can be pulled out, and can be used as a pulling-out tool.

  Furthermore, as a method of embedding the sheet pile 6, it can also be performed using two sheet pile embedding devices. For example, one apparatus is specialized for excavating with an auger, and the other is divided into an apparatus for incorporating, press-fitting, and embedding the sheet pile 6 into the sheet pile embedding area 7. As described above, when the two units are used as a set, attachment and detachment of the auger and the sheet pile embedding tool to the attachment 16 becomes unnecessary, and time can be shortened and work efficiency can be improved.

  In addition, as a related matter of the present invention, for example, the sheet pile burying apparatus is installed on the upper road of the river embankment by the following method, and the sheet pile 6 is installed from the upper (ceiling end) road of the embankment. It becomes possible to bury it.

  For example, if there is no road around the river's embankment, sheet piles need to be buried from the top (ceiling end) of the narrow embankment, and transport the sheet pile to the sheet pile burial device and transport the narrow upper road of the embankment. There must be. For example, as shown in FIG. 15, a mini crane 42 is installed on the upper road 41 of the embankment 40 as a method of transporting the sheet pile to the upper road of the embankment and transporting it to the burial site with the sheet pile burying device. A truck 43 which carries and transports the sheet pile 6 is connected to the rear of the mini crane 42. From the truck 45 where the sheet pile 6 is loaded on the lower road 44 of the embankment and the sheet pile storage area at the lower part of the embankment (hereinafter also referred to as "sheet pile storage area") Load up. After folding out the outrigger 46 of the mini crane 42 so that the mini crane 42 can travel, the mini crane 42 travels to pull the carriage 43 and travel the upper road 41 of the narrow embankment 40 to transport to the burial site . After the sheet pile 6 is taken down from the carriage 43 by the mini crane, the carriage 43 is lifted by the mini crane 42 to return to the sheet pile storage area, and rotated 180 degrees to connect the carriage 43 to the rear side in the traveling direction of the mini crane 42 . The mini crane 42 is put in the traveling state again, the carriage 43 is pulled by the mini crane 42, returned to the sheet pile storage area, the outrigger 46 of the mini crane 42 is extended and installed, the carriage 43 is lifted, and the carriage 43 is turned by 180 degrees. It is conceivable to move backward and connect.

  In addition to the above, self-propelled bogies for unloading and mini-cranes for unloading are used to move to the burial site, and after loading and unloading sheet piles on bogies using mini-cranes at the burial site, mini-cranes It is also conceivable to return to the sheet pile storage area with a traveling truck. Furthermore, it is also conceivable that the sheet pile is transported to the burial site only by a self-propelled carriage and the sheet pile is suspended by a sheet pile burial device or manually unloaded. In addition, one mini crane is disposed at each of the sheet pile storage area and the burial site, and the method of transporting by the carriage 4 traveling by itself between the sheet pile storage area and the sheet pile storage area is used. A method is also conceivable in which the cart is pushed and moved by human power and unloaded at the burial site by human power or sheet pile burial machine. Furthermore, it is also possible to combine and transport each method. If the sheet pile 6 is not supplied to the sheet pile embedding device 4 by repeating this work, the sheet pile 6 can not be cast from the road 41 on the upper side of the bank 40 of the river.

  In addition, as related matter of the present invention, the embankment can be further strengthened after sheet pile burial in the embankment, for example. That is, after completion of the burying of the sheet pile 6, the embankment 40 is reinforced by injecting cement milk or a drug for hardening the soil, etc. between the soil of the soft hole which has been dug in advance by the auger and the gap between the sheet pile 6 . In addition, when raising the embankment 40, when press-fitting the sheet pile, the height of the sheet pile 6 is stopped in advance by the height of the raised 47 of the embankment 40, as shown in FIG. The sheet pile 6 plays a role as a foundation pile of the raised 47 of the embankment 40, and the strong embankment 40 can be raised. Also, the trench piles 6 can be embedded not only in one row, but also in a plurality of rows, and can be made stronger 47 more.

  The present invention is not limited to the above embodiment, and the technical scope of the claims includes variously modified forms within the scope of the invention.

  According to the present invention, sheet piles can be easily embedded at various sheet pile embedding sites by the method as described above.

Reference Signs List 1 embedded reference line 2 auger 3 auger 4 sheet pile embedding device 5 contact preventing jig 6 sheet pile 7 sheet pile embedded area 9 underground press-in tool 12 power device 13 boom 14 rotation drive mechanism 15 rotation shaft 16 attachment 17 sheet pile embedding tool 18 Tip part 19 packet 20 tip of packet 20 rotation drive mechanism fixture 21 hook of auger tip 22 hooking mechanism 23 engaging convex part 31 hook of auger tip 32 hooking mechanism 33 engaging convex part 34 thin iron plate 35 anti-entanglement prevention Mechanism 40 embankment 41 embankment upper road 42 mini crane 43 truck 44 embankment road 45 truck 46 outrigger 47 embankment raised 48 reinforcement 49 formwork 50 concrete 51 contact prevention jig pile part 52 contact prevention jig Main body portion 53 Adjustment portion 61 of contact prevention jig Engaging concave portion 6 of attachment Attachment engaging hole 63 Attachment connecting part 71 Sheet pile embedding tool engaging hole 72 Sheet pile embedding tool groove 73 Sheet pile embedding tool fixing tool 81 Pressing tool 82 tip tool connecting tool 84 tip tool Hooks 91 Underground press-in claws insertion part 92 Underground press-in clearances 93 Underground press-in wire connection holes 94 Underground press-in engagement holes

Claims (11)

(1) Provide a buried reference line on the ground at the position where the sheet pile will be buried,
(2) Bury a plurality of augers in the ground at a position adjacent to the burial reference line,
(3) One auger buried at one end of the buried reference line is pulled out to the ground, and the one auger is buried again on the buried reference line at a position close to another buried auger. And
(4) A sheet pile embedding area is formed by performing the work of (3) a plurality of times,
(5) A sheet pile burying method characterized in that a sheet pile is built in the sheet pile embedding area, and a load is given to embed the sheet pile.   In (2), alternately embedding one auger provided with a scraping mechanism consisting of an iron rod on the outer peripheral surface of the steel pipe and another auger having no scraping mechanism provided on the outer peripheral surface of the steel pipe The sheet pile embedding method according to claim 1 characterized by   The sheet pile embedding method according to claim 2, wherein the other auger is wound around the outer peripheral surface with a thin thinning prevention iron plate.   The sheet according to claim 1, wherein in (2), the scraping mechanism is provided around the steel pipe, and the sheet is embedded using an auger provided with a entanglement preventing mechanism around the scraping mechanism. Pile burial method   The said (3) and (4) arrange | positions a contact prevention jig in the position which contact | connects the other auger currently embed | buried, and embeds one auger in any one of 4 characterized by the above-mentioned. Sheet pile burial method   A construction machine having a boom whose tip position can be moved in three dimensions, a rotary drive mechanism having a vertical rotation axis suspended at the tip of the boom, and an auger provided under the rotation axis of the rotation drive mechanism And / or sheet pile embedment using a sheet pile embedment device comprising a sheet pile embedment device for releasably engaging a sheet pile embedment for holding the sheet pile and / or Sheet pile embedding method according to any one of 1 to 5   The tip end of the boom is provided with a tip having a pressing portion and a hook, the pressing portion of the tip is pressed against the sheet pile, and the sheet pile is embedded by applying a load. Sheet pile burial method described   The attachment has a cylindrical outer shape and a through hole is provided on the outer peripheral surface thereof, and the sheet pile embedding tool has a cylindrical outer shape smaller than the outer shape of the attachment, and the attachment on the outer peripheral surface A through hole having substantially the same size as that of the through hole is provided, and the sheet pile embedding tool and the attachment are engaged via the respective through holes. Sheet pile burial method   The sheet pile embedding tool has two grooves facing each other at the lower end portion of the outer peripheral surface, has a fixing portion for fixing the sheet pile on the inner surface of the lower end portion, and inserts the sheet pile into the two grooves. The sheet pile burying method according to claim 8, characterized in that the sheet pile is embedded by being fixed at a fixing portion.   A plurality of sheet pile embedding apparatuses are used, the above (1) to (4) are performed using one sheet pile embedding apparatus, and the above (5) is performed using another sheet pile embedding apparatus. The sheet pile embedding method according to any one of claims 1 to 9. 11. The sheet pile burying method is used to feed and bury a sheet pile at the top end of a river embankment, and the sheet pile is used as a foundation pile for reinforcement and raising of the embankment. Sheet pile burial method according to any of

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