JP2017002629A - Auger combinedly-using steel sheet pile press-in method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auger combinedly-using steel sheet pile press-in method for pressing in a steel sheet pile of various joint pitches by combinedly using simultaneous excavation by an auger when pressing in a steel sheet pile, by using the same steel sheet pile press-in pull-out machine.SOLUTION: By using the same steel sheet pile press-in pull-out machine 50, a U-shaped steel sheet pile 1 different in a joint pitch is continuously pressed in by mutually meshing a joint, by combinedly using simultaneous excavation by an auger 25 of using an auger casing 2 different in a diameter in response to the joint pitch of the steel sheet pile 1.SELECTED DRAWING: Figure 2

Description

  The present invention uses the same steel sheet pile press-fitting and drawing machine to make steel sheet piles of various joint pitches, particularly a plurality of U-shaped steel sheet piles having a difference of about 200 mm or more in joint pitches at the time of steel sheet pile press-fitting. The present invention relates to an auger combined steel sheet pile press-fitting method in which simultaneous excavation by an auger is used to continuously press-fit a steel sheet pile joint.

  In recent years, in the press-fitting and drawing work of steel sheet piles in various civil engineering foundation works, etc., a static load type steel sheet pile press-fitting and drawing machine that generates less vibration and noise has been adopted. Various types of steel sheet piles to be press-fitted are provided. Currently, U-shaped steel sheet piles are widely used in Japan (see Non-Patent Document 1), and U-shaped steel sheet piles with a joint pitch of 400 mm. Is mainly used. In addition, recently, wide U-shaped steel sheet piles with joint pitches of 500 mm and 600 mm are also used.

  For this reason, the applicant has provided a static load type steel sheet pile press-in / pull-out machine having versatility capable of press-fitting and pulling out steel sheet piles having different joint pitches as described above (Patent Document 1). This steel sheet pile press-and-pull machine is equipped with a plurality of chuck devices corresponding to the steel sheet pile joint pitch as a chuck device, and the plurality of chuck devices can be detachably attached to the chuck frame, respectively. By clamping an existing steel sheet pile including the steel sheet pile, the pedestal was placed on the existing steel sheet pile, and the steel sheet pile pressed into the chuck device was inserted and chucked, and the leading steel sheet pile was released. In the state in which the joint of the steel sheet pile to be press fitted into the joint is engaged, the plurality of chuck devices mounted on the chuck frame adopt a configuration that does not interfere with other members of the steel sheet pile press-fitting and drawing machine. Therefore, it is possible to press-fit and pull out steel sheet piles with various joint pitches.

  As shown in Patent Document 1, a static load type steel sheet pile press-and-puller is provided with a clamp device composed of a plurality of clamp members below a pedestal placed on an existing steel sheet pile, and this clamp device provides an existing A reaction force is obtained by clamping the steel sheet pile, and the steel sheet pile chucked by the chuck device is press-fitted and pulled out from the ground by a press-fitting pull-out cylinder. Therefore, when the pressure input by the press-fitting cylinder required to press-fit the steel sheet pile in hard ground, etc. exceeds the reaction force obtained from the existing pile (pressure input> reaction force from the existing pile), the steel sheet pile Cannot be press-fitted. In such a case, the pressure of the steel sheet pile can be reduced with the pressure input less than the reaction force obtained from the existing pile by reducing the press-fitting resistance due to earth pressure by using the excavation of the press-fitted ground with an auger simultaneously with the press-fitting of the steel sheet pile. Press-in is possible.

  Simultaneous excavation with an auger at the time of steel sheet pile press-fitting is performed by holding the auger casing in the concave part of the U-shaped steel sheet pile and chucking the steel sheet pile and auger casing with a chuck device. The press-fitted ground is excavated by an auger (auger head) that is engaged and attached to the tip of a screw rod that is inserted into the auger casing. Since the purpose of simultaneous excavation with an auger is to reduce the press-fitting resistance due to earth pressure in hard ground or the like, it is desirable to excavate the entire cross-sectional area of the steel sheet pile to be pressed in as much as possible. Furthermore, it is necessary to pay attention not to cause excessive excavation that reduces the peripheral frictional resistance of the pressed steel sheet pile.

  The auger casing in simultaneous excavation is required to be able to be chucked by the chuck device in close contact with the press-fitted steel sheet pile, and is held in the recess formed between the web and the flange of the steel sheet pile as described above. Is chucked. Therefore, the diameter of the auger casing that can be used in the simultaneous excavation is determined by the joint pitch of the steel sheet piles. Therefore, the diameter of the auger casing to be used is selected according to the joint pitch of the steel sheet pile to be press-fitted, and the auger casing having the maximum diameter that can be held by each steel sheet pile having a different joint pitch is selected and used. It is desirable.

  However, in order to properly use the auger casing that can be held in the recess of the steel sheet pile according to the joint pitch of the steel sheet pile, it is necessary to equip a plurality of auger casings with different diameters in advance, which increases the number of parts. In addition, labor for carrying in and out of the work site will increase. On the other hand, as long as it can be held in the recess of the steel sheet pile, excavation is possible regardless of the diameter size of the auger casing. Therefore, at present, the main focus is on making the auger casing versatile from the economical point of view and dealing with steel sheet piles with different joint pitches in one auger casing. Thus, auger casings having different diameters are not properly used. In other words, the economic advantage of the former was greater than the advantage of the latter.

  Therefore, as an auger casing with versatility, an auger casing having a diameter that can be held by a steel sheet pile with the smallest joint pitch is used for press-fitting steel sheet piles having a large joint pitch. It was. Specifically, an auger casing having the largest diameter (diameter 318.5 mm) that can be held by a steel sheet pile with a joint pitch of 400 mm, which is the most frequently used, is a general-purpose product even when a steel sheet pile with a joint pitch of 500 mm and 600 mm is press-fitted. As shared.

Japanese Patent No. 5460443

JIS A 5528 Hot rolled steel sheet pile

  The earth and sand excavated by simultaneous excavation by the auger at the time of steel sheet pile press-fitting is conveyed in the ground direction by a screw rod inside the auger casing, and among the plurality of earthing holes drilled at appropriate intervals in the peripheral part of the auger casing, It is discharged to the ground from the earth exit that is exposed on the ground. Therefore, excavation by the auger does not proceed unless the earth and sand filled in the auger casing is discharged from the discharge port. Therefore, in order to perform excavation with the auger efficiently, it is necessary to discharge the excavated earth and sand smoothly, and the excavation efficiency can be grasped as the earth discharge efficiency of the excavated earth and sand.

  The passage area of the earth and sand excavated by the auger in the auger casing is an area obtained by subtracting the sectional area of the screw rod from the inner diameter sectional area of the auger casing. The larger the passage area, the smaller the passage resistance of the discharged earth and sand, and the smaller the passage area, the larger the passage resistance. When the passage resistance is increased, it is necessary to decrease the rotation speed of the screw rod and increase the driving torque of the auger drive device. Therefore, the discharge time is increased due to the decrease in the rotation speed, and the soil removal efficiency is deteriorated.

  When performing auger excavation with an auger drive device having the same drive force, increasing the diameter of the auger casing has a smaller earth removal resistance, and accordingly, the excavation force of the auger drive device can be increased. Therefore, the time for excavation and soil removal is shortened, and the press-fitting time that is combined with excavation by an auger can be shortened. Specifically, when a steel sheet pile having a joint pitch of 500 mm is press-fitted, excavation by an auger is used in combination with an auger casing (diameter 318.5 mm) having a maximum diameter that can be held by a steel sheet pile having a joint pitch of 400 mm. Rather than using an auger casing (diameter 355.6 mm) that has a maximum diameter that can hold a steel sheet pile with a joint pitch of 500 mm, excavation with an auger is used to significantly reduce the earth removal time. It can be shortened.

  The conventional simultaneous excavation of augers during the press-fitting of steel sheet piles places great emphasis on economic efficiency, and technical interest is whether or not excavation is possible by sharing the auger casing as a general-purpose product. Shortening the construction period due to improvements was not considered a technical issue. That is, the emphasis when press-fitting a plurality of steel sheet piles with different joint pitches in combination with simultaneous excavation by an auger is to improve economics by sharing an auger casing, and simultaneous excavation is possible. No special attention was paid to construction efficiency at the expense of economy.

  Recently, interest in the auger combined steel sheet pile press-in method has increased, and the target of construction has expanded beyond the conventional earth retaining foundation work to new targets. In particular, an auger combined steel sheet pile press-in method is attracting attention in constructions involving urgency such as restoration work and countermeasure work resulting from disasters such as earthquakes and tsunamis, for example, embankment construction work and embankment reconstruction work. Since these constructions are urgent due to their nature, as a new issue, steel sheet piles with various joint pitches selected from steel sheet piles with different joint pitches depending on the construction conditions are constructed as early as possible in time. It has come to be required to do.

  However, the conventional construction method that places importance on economic efficiency and shares a versatile auger casing regardless of the joint pitch of steel sheet piles has not been recognized as a serious issue, so the recent construction period It was difficult to meet the demand for shortening. And in urgent construction, the demand for shortening the construction period will increase more and more in the future.

  Therefore, the present invention uses the same steel sheet pile press-fitting machine to join steel sheet piles of various joint pitches together with the joints of the steel sheet piles together with simultaneous excavation by an auger at the time of steel sheet pile press-fitting. In the auger combined steel sheet pile press-in method for continuous press-fitting, the new issue mentioned above is the pursuit of construction efficiency for shortening the work period by improving the soil removal efficiency during excavation, and the common use of the auger casing, which is a conventional issue It aims to provide a new auger combined steel sheet pile press-in method that satisfies the balance with the pursuit of economic efficiency.

  The applicant pays attention to Patent Document 1 that can handle steel sheet piles having various joint pitches by exchanging and using a plurality of chuck devices in the same steel sheet pile press-fitting and drawing machine. In the press-fitting method, a plurality of chuck devices are used properly according to the joint pitch of the steel sheet piles, and a plurality of auger casings having different diameters are installed and used for each chuck device unit used in the steel sheet pile press-puller. It was conceived that both the pursuit of construction efficiency by improving the soil removal efficiency during excavation and the pursuit of economic efficiency by sharing the auger casing can be realized in a balanced manner. That is, the present invention is based on the idea that each a plurality of chuck devices is equipped with an auger casing having a different diameter.

  In order to solve the above-mentioned problems, the present invention uses the same steel sheet pile press-fitting machine to form U-shaped steel sheet piles having different joint pitches, and auger casings having different diameters according to the joint pitches of the steel sheet piles. An auger combined steel sheet pile press-in method is provided as a basic feature, in which excavation by an auger to be used is used together, and a joint is mutually engaged and press-fitted continuously.

  And, as U-shaped steel sheet piles, joint pitches of 400 mm, 500 mm, and 600 mm are used, and an auger casing for press-fitting U-shaped steel sheet piles with a joint pitch of 400 mm can be held in the recesses of the steel sheet piles. An auger casing having a maximum diameter that can be held in a recess of a steel sheet pile having a joint pitch of 500 mm as an auger casing when a U-shaped steel sheet pile having a joint pitch of 500 mm or 600 mm is press-fitted using an auger casing having the maximum diameter. Use a casing.

  Moreover, as a steel sheet pile press-in / drawing machine, a pedestal having a clamping device disposed below, a slide base slidably disposed on the pedestal, a turntable rotatably disposed on the slide base, and a turntable A guide frame that is erected on the top, a lift body that is mounted on the guide frame so as to be movable up and down and has a steel sheet pile press-in / pull-out cylinder attached thereto, a chuck frame that is formed below the lift body, and a swivel within the chuck frame Drilling with an auger using a steel sheet pile press-fitting / removing machine equipped with a U-shaped steel sheet pile and an auger casing and detachably equipped with a first chuck device or a second chuck device. And steel sheet pile press-fitting cylinder are used together, U-shaped steel sheet piles are meshed with each other and continuously pressed into the ground. Upon stuffing plate, by engaging the distal end of the tip and the steel sheet pile of the auger casing, kept together so as not shift the position of the tip of the tip and the auger casing of the steel sheet pile.

  Further, a U-shaped steel sheet pile having a joint pitch of 400 mm and a first auger casing having a maximum diameter that can be held in the recess of the steel sheet pile are inserted into the first chuck device, and a U-shaped steel sheet pile having a joint pitch of 400 mm is inserted. A second auger having a maximum diameter capable of being held in a concave portion of a U-shaped steel sheet pile having a joint pitch of 500 mm or 600 mm and a steel sheet pile having a joint pitch of 500 mm in the second chuck device while press-fitting the steel sheet pile into the ground A U-shaped steel sheet pile having a joint pitch of 500 mm or 600 mm is press-fitted into the ground through the casing.

  And, the existing U-shaped steel sheet pile including the leading steel sheet pile among the plurality of existing steel sheet piles press-fitted with the joints engaged with each other is gripped by the clamping device, and the pedestal is installed on the existing U-shaped steel sheet pile In the state of being placed on the upper side, the U-shaped steel sheet pile and the first auger casing with a joint pitch of 400 mm are inserted into the first chuck device for chucking, or the second chuck device has a joint pitch of 500 mm or 600 mm. While inserting and chucking the U-shaped steel sheet pile and the second auger casing to be press-fitted, the joint of the U-type steel sheet pile to be press-fitted is press-fitted into the open joint of the leading U-shaped steel sheet pile, When press-fitting a U-shaped steel sheet pile with a joint pitch of 600 mm, the second auger casing is held in an eccentric manner in the direction of press-fitting of the steel sheet pile.

  According to the auger combined steel sheet pile press-in method according to the present invention, a plurality of chuck devices corresponding to the joint pitch of the steel sheet piles can be detachably attached to the chuck frame of the steel sheet pile press-out machine. It is possible to replace the chuck device. Then, it becomes possible to chuck the steel sheet piles having different joint pitches to the plurality of chuck devices and the auger casing having the maximum diameter that can be held in the recesses of the steel sheet piles. Therefore, excavation by an auger at the time of press-fitting can be performed using an auger casing having a diameter size with good soil removal efficiency according to the joint pitch of steel sheet piles.

  Instead of sharing an auger casing with a diameter that can be used in common with steel sheet piles of joint pitches of all sizes as press-fitting objects in the conventional construction method, multiple chuck devices are pressed into the same steel sheet pile. In the present invention used in the drawing machine, by selecting the diameter size of the auger casing for each of the plurality of chuck devices in units of the chuck device, the soil removal efficiency can be improved according to the joint pitch of the steel sheet piles to be press-fitted. In addition, the construction efficiency in the auger combined steel sheet pile press-in method can be improved and the construction period can be shortened.

  Specifically, when a steel sheet pile having a joint pitch of 400 mm, 500 mm, and 600 mm is press-fitted with the same steel sheet pile press-and-puller together with excavation by an auger, the chuck device is for a steel sheet pile with a joint pitch of 400 mm. The first chuck device and the second chuck device for the joint pitches 500 mm and 600 mm are used. Then, a steel sheet pile having a joint pitch of 400 mm and a first auger casing having a maximum diameter that can be held in the concave portion of the steel sheet pile are inserted into the first chuck device, and a U-shaped steel sheet pile having a joint pitch of 400 mm is ground. The steel sheet pile with a joint pitch of 500 mm or 600 mm and the second auger casing having the maximum diameter that can be held in the recess of the steel sheet pile with a joint pitch of 500 mm are inserted into the second chuck device and the joint pitch of 500 mm or A 600 mm U-shaped steel sheet pile can be pressed into the ground.

  As a result, a steel sheet pile press fitter that can press-fit steel sheet piles with a joint pitch of 400 mm together with excavation using an auger can be used to press-fit steel sheet piles with joint pitches of 500 mm and 600 mm using simultaneous excavation with an auger. The soil removal efficiency during excavation can be improved. That is, any steel sheet pile with a joint pitch of 400 mm, 500 mm, and 600 mm can be excavated with an auger with good earth removal efficiency, and the construction period can be shortened compared to the past. Both the pursuit of construction efficiency for shortening the construction period by improving the soil removal efficiency during excavation can be realized in a balanced manner. Therefore, it is possible to deal with urgent work such as restoration work and countermeasure work caused by disasters such as earthquakes and tsunamis, for example, embankment construction work and embankment reconstruction work.

Process explanatory drawing which shows the principal part of the auger combined use steel sheet pile press-fitting method concerning this invention. The side view of the steel sheet pile press-fit drawing machine which shows the mounting state of an auger casing and a steel sheet pile. The perspective view of the 1st chuck device. The perspective view which shows the assembly | attachment state to the chuck | zipper frame of a 1st chuck apparatus. The perspective view which shows the mounting state to the chuck | zipper frame of a 1st chuck apparatus. The perspective view of the 2nd chuck device. The perspective view which shows the assembly | attachment state to the chuck | zipper frame of a 2nd chuck apparatus. The perspective view which shows the mounting state to the chuck | zipper frame of a 2nd chuck apparatus. The top view of a U-shaped steel sheet pile. The top view which shows the construction state of a U-shaped steel sheet pile. The perspective view of a U-shaped steel sheet pile. The perspective view which shows the mounting state of an auger casing and an auger excavator. The principal part perspective view of an auger casing. Explanatory drawing which shows the mounting method of an auger casing and a steel sheet pile. Explanatory drawing which shows the mounting state of an auger casing and a steel sheet pile. (A) is a perspective view which shows the mounting state of an auger casing and a steel sheet pile, (b) is the same top view. (A) is a perspective view which shows the mounting state of an auger casing and a steel sheet pile, (b) is the same top view. (A) is a perspective view which shows the mounting state of an auger casing and a steel sheet pile, (b) is the same top view.

  Hereinafter, an embodiment of an auger combined steel sheet pile press-fitting method according to the present invention will be described with reference to the drawings. In the present invention, a steel sheet pile that is pressed together with simultaneous excavation at the time of press-fitting with an auger is a “U-shaped steel sheet pile 1” (hereinafter simply referred to as “steel sheet pile 1”) that is most widely used in Japan. In particular, a plurality of steel sheet piles 1 having a difference of about 200 mm or more in the joint pitch P are targeted.

  In this embodiment, the steel sheet piles 1a, 1b, and 1c are collectively referred to as a steel sheet pile 1, and the first auger casing 2a and the second auger casing 2b are collectively referred to as an auger casing 2, and the first chuck device 3a and the second chuck. The apparatus 3b is collectively referred to as a chuck apparatus 3. In addition, the insertion holes 31a and 31b in the chuck device 3 are integrated into the insertion hole 31, the chuck portions 32a and 32b are integrated into the chuck portion 32, the chuck ring gears 33a and 33b are integrated into the chuck ring gear 33, the flange 34a, 34b is collectively referred to as a flange 34.

  As shown in FIGS. 9 and 10, the steel sheet pile 1 has a substantially U-shaped cross-section, and flanges 12 having a predetermined arrangement angle θ are connected to both ends of the web 11. A joint 13 is formed at the open end. In the steel sheet pile 1, the web 11 extends in parallel with the neutral axis L1, and the arrangement angle θ of the flange 12 varies depending on the joint pitch P. Accordingly, a recess 14 is formed in a region surrounded by the web 11 and the flange 12. Then, the joints 13 are engaged with each other and continuously press-fitted as shown in FIG. Therefore, the joint 13 is located on the neutral axis L2 of the steel sheet pile wall after press-fitting. Conventionally, the joint pitch P of the steel sheet pile 1 is mainly 400 mm, and recently, those having a wide width of 500 mm and 600 mm are also used. In the present invention, the steel sheet pile 1 having a joint pitch P of 400 mm, 500 mm, and 600 mm, which is mainstream in Japan, is a specific press-fitting target.

  FIG. 2 is a side view of the steel sheet pile press-fitting / removing machine 50 showing the mounted state of the auger casing 2 and the steel sheet pile 1. In the figure, reference numeral 50 denotes a steel sheet pile press-fitting / drawing machine, 51 is a pedestal, 52 is a clamping device, which is disposed at the lower part of the pedestal 51 and clamps an existing steel sheet pile 15 to make a steel sheet pile press-fitting and drawing machine 50 And a reaction force is obtained from the existing steel sheet pile 15. In the illustrated example, three clamp members 52a, 52b, and 52c are provided so as to be slidable in the width direction along the clamp guide formed on the lower surface of the base 51.

  Even if the size of the joint pitch P of the existing steel sheet pile 15 has a difference of about 200 mm or more by changing or adjusting the number, shape, interval, direction, etc. of the clamp device 52, the existing steel sheet pile 15 And the steel sheet pile press-fitting / drawing machine 50 can be fixed. Specifically, even the existing steel sheet pile 15 having a joint pitch P of 400 mm, 500 mm, or 600 mm, or a combination of these joint pitches P can be clamped by the clamp device 52.

  F shows the advancing direction of the steel sheet pile press-fitting and drawing machine 50. A slide base 53 is provided on the pedestal 51 so as to be slidable at a distance equal to or greater than the joint pitch P of the steel sheet pile 1 to be press-fitted along the straight traveling direction F of the steel sheet pile press-fit pulling machine 50. A turntable 54 is disposed on the slide base 53 so as to be rotatable about a vertical axis (not shown), and a support arm 56 pivotally supported by a bearing portion 55 provided at the tip of the turntable 54. A guide frame 57 is erected via the. The guide frame 57 can be tilted about the horizontal axis of the bearing portion 55 by expansion and contraction of a tilt cylinder (not shown) whose one end is pivotally supported by the support arm 56.

  An elevating body 58 is mounted on the guide frame 57 so as to be movable up and down. A pair of left and right steel sheet pile press-in / pull-out cylinders 59 are attached to both sides of the lift body 58, and one end of the steel sheet pile press-in / pull-out cylinder 59 is pivotally supported by the bearing portion 55. It is configured to drive. A chuck frame 4 is formed below the elevating body 58, and a steel sheet pile 1 having a different joint pitch P and an auger casing 2 having a different diameter are respectively inserted into the chuck frame 4 through insertion holes 31 (FIGS. 3 and 6). (See) A plurality of chuck devices 3 that can be inserted into the chuck and can be chucked integrally are detachably mounted. Reference numeral 28 denotes a hydraulic hose winder for supplying pressure oil as a power source to the auger excavator 27.

  3 is a perspective view of the first chuck device 3a constituting the plurality of chuck devices 3, FIG. 4 is a perspective view showing the assembled state to the chuck frame 4, and FIG. 5 is a perspective view showing the mounted state. It is. The first chuck device 3a can be inserted through a first auger casing 2a having a maximum diameter (specifically, a diameter of 318.5 mm) that can be held in a steel sheet pile 1a having a joint pitch P of 400 mm and a recess 14 of the steel sheet pile 1a. Insertion holes 31a (31), a chuck portion 32a (32) for chucking and fixing the steel sheet pile 1a inserted through the insertion holes 31a (31) and the first auger casing 2a as a unit, and the insertion holes 31a (31) A chuck ring gear 33a (33) installed at the upper end of the first chuck device 3a so as to surround the outer periphery, and a ring-shaped flange 34a (34) installed at the lower part of the chuck ring gear 33a (33). Have. The chuck portion 32a (32) has a known configuration including a fixed chuck claw, a movable chuck claw, and a cylinder device that operates the movable chuck claw.

  The first chuck device 3a is rotatably mounted in the chuck frame 4. The chuck frame 4 is provided with a groove 41 on the inner peripheral surface, and a semicircular front cover 42 is detachable. As shown in FIG. 4, the flange 34a (34) of the first chuck device 3a is fitted into the groove 41 of the chuck frame 4 with the front cover 42 removed, and thereafter the flange 34a is inserted into the groove 41 of the front cover 42 in the same manner. After fitting (34), the front cover 42 is fixed to the chuck frame 4 using a fastener such as a bolt. The first chuck device 3a mounted in the chuck frame 4 has a pinion gear (not shown) connected to a drive shaft of a chuck turning motor mounted on the elevating body 58 as a chuck ring gear 33a ( 33) and can be rotated in the chuck frame 4.

  6 is a perspective view of the second chuck device 3b constituting the plurality of chuck devices 3, FIG. 7 is a perspective view showing the assembled state of the chuck device 4 to the chuck frame 4, and FIG. 8 is a perspective view showing the mounted state. It is. The second chuck device 3b includes a steel sheet pile 1b with a joint pitch P of 500 mm, a steel sheet pile 1c with a joint pitch P of 600 mm, and a maximum diameter that can be held in the recess 14 of the steel sheet pile 1b (specifically, a diameter of 355.6 mm). An insertion hole 31b (31) through which the second auger casing 2b having a hole can be inserted, and a steel sheet pile 1b or steel sheet pile 1c inserted through the insertion hole 31b (31) and the second auger casing 2b are integrally chucked and fixed. Of the chuck ring gear 33b (33), the chuck ring gear 33b (33) installed at the upper end of the second chuck device 3b so as to surround the outer periphery of the portion 32b (32), the insertion hole 31b (31) It has a ring-shaped flange 34b (34) installed in the lower part. The chuck portion 32b (32) has a known configuration including a fixed chuck claw, a movable chuck claw, and a cylinder device that operates the movable chuck claw.

  The second chuck device 3b is rotatably mounted in the chuck frame 4 in the same manner as the first chuck device 3a. Therefore, the chuck frame 4 can be detachably equipped with both the first chuck device 3a and the second chuck device 3b, and selects the chuck device 3 to be used corresponding to the joint pitch P of the steel sheet pile 1 to be press-fitted. In addition, the auger casing 2 to be used can be changed according to the chuck device 3.

  Next, the structure of the 1st auger casing 2a chucked with the steel sheet pile 1a with the 1st chuck apparatus 3a and the 2nd auger casing 2b chucked with the steel sheet pile 1b or the steel sheet pile 1c with the 2nd chuck apparatus 3b are demonstrated. The first auger casing 2a and the second auger casing 2b have the same configuration except that the diameter and the inner diameter are different. As shown in FIG. 13, the auger casing 2 is a hollow cylindrical body having a predetermined length. The auger casing 2 holds a predetermined thickness at one end portion of the outer peripheral portion, and extends in the radial direction while facing each other and extends in the vertical direction. A long fixing plate 21 is projected. The fixing plate 21 is a member for chucking by the chuck portion 32 of the chuck device 3. At the other end of the auger casing 2 in the opposite direction of the fixed plate 21, a pair of long close contact plates 22 that extend in the direction perpendicular to the fixed plate 21 and extend in the vertical direction are fixed. Projected at intervals. The contact plate 22 is for abutting the inner surface of the flange 12 constituting the recess 14 of the steel sheet pile 1 to position the auger casing 2 and the steel sheet pile 1.

  Guide plates 23 project from the outer peripheral surface of the auger casing 2 located on the outer side of the close contact plate 22. The guide plate 23 has a rectangular parallelepiped shape having a predetermined thickness, and has a notch 23a at one end. FIG. 14 is an explanatory view showing a method of mounting the auger casing 2 and the steel sheet pile 1. As shown in the figure, the auger casing 2 is positioned on the web 11 of the steel sheet pile 1 so that the auger casing 2 is positioned in the recess 14 of the steel sheet pile 1. An engagement plate 16 (16a, 16b) having a predetermined thickness projecting from the inner surface of the pair of flanges 12 at the tip of the steel sheet pile 1 is brought into contact with the guide plate 23 of the auger casing 2 by contacting the close plate 22 of the casing 2. Both are engaged by being inserted into the notch 23a, and the auger casing 2 and the steel sheet pile 1 are fixed at the leading ends. This is to keep the tip of the steel sheet pile 1 and the auger casing 2 so that the positions of the steel sheet pile 1 and the auger casing 2 do not deviate when the steel sheet pile 1 is pressed and the auger 25 is excavated simultaneously in order to increase the excavation accuracy.

  As shown in FIG. 12, an auger excavator 27 (earth auger) is attached to the upper end portion of the auger casing 2, and a screw rod 24 connected to the auger excavator 27 is inserted. The raising and lowering means of the screw rod 24 is performed by the vertical movement of the cylinder built in the auger excavator 27 or the vertical movement of the lifting body 58 of the steel sheet pile press-fitting and pulling machine 50 holding the auger casing 2. In addition, the diameter of the auger 25 can be excavated in a wider range than the diameter of the auger casing 2 by using a diameter that can be expanded or reduced from the diameter of the auger casing 2. The auger 25 having an excavation range is selected and used by appropriately replacing it. The first auger casing 2a uses an auger 25 having a diameter larger than its diameter (318.5 mm), and a second auger. In the casing 2b, an auger 25 having a diameter larger than its diameter (355.6 mm) is used.

  As shown in FIG. 12, a plurality of soil discharge ports 26 are drilled at appropriate intervals in the peripheral portion of the auger casing 2, and the earth and sand excavated by simultaneous excavation by the auger 25 when the steel sheet pile 1 is press-fitted, The inside of the auger casing 2 is conveyed in the ground direction by the screw rod 24 and is discharged to the ground from the earth discharge port 26 exposed on the ground. And the longer the diameter of the auger casing 2 and the wider the cross-sectional area, the smoother the soil removal, and the higher the soil removal efficiency. In FIG. 13 to FIG. 18, the earth discharge port 26 is not shown.

  In order to chuck the auger casing 2 and the steel sheet pile 1 with the chuck device 3 at the time of construction, the steel sheet pile 1 suspended and supported by the crane in the state where the auger casing 2 is chucked by the chuck device 3 as shown in FIG. The engagement plate 16 (16a, 16b) formed at the tip of the steel sheet pile 1 is inserted into the insertion hole 31 of the chuck device 3 so that the auger casing 2 follows the recess 14 and the notch of the guide plate 23 of the auger casing 2 is formed. The auger casing 2 and the steel sheet pile 1 are chucked together by the chuck portion 32 by the chuck device 3 while being engaged with the portion 23a. Thereafter, the chuck device 3 is swung to a predetermined position in the chuck frame 4, and the joint 13 of the steel sheet pile 1 to be press-fitted with the joint 13 open of the existing steel sheet pile 15 is engaged with the auger 25. In combination with excavation, the steel sheet pile press-fitting cylinder 59 is driven to press-fit the steel sheet pile 1.

  FIG. 16A is a perspective view showing a mounting state of a steel sheet pile 1a having a joint pitch P of 400 mm and a first auger casing 2a having a maximum diameter (diameter 318.5 mm) that can be held by the steel sheet pile 1a. FIG. 16B is a plan view of the same. As illustrated, the steel sheet pile 1a and the first auger casing 2a are mounted so that the center of the first auger casing 2a is positioned on the center line of the joint pitch P of the steel sheet pile 1a. Thereby, the range except the joint 13 of the steel sheet pile 1a engaged with the joint 13 of the existing steel sheet pile 15 can be efficiently excavated by simultaneous excavation of the auger 25 capable of expanding the diameter when the steel sheet pile 1a is press-fitted. it can. At that time, the steel sheet pile 1a and the first auger casing 2a are integrally chucked by the first chuck device 3a, and the engagement plate of the steel sheet pile 1a is inserted into the notch 23a of the guide plate 23 formed at the tip of the first auger casing 2a. Since 16 is engaged, both are not separated.

  FIG. 17A is a perspective view showing a mounting state of a steel sheet pile 1b having a joint pitch P of 500 mm and a second auger casing 2b having a maximum diameter (diameter 355.6 mm) that can be held by the steel sheet pile 1b. FIG. 17B is a plan view of the same. As illustrated, the steel sheet pile 1b and the second auger casing 2b are mounted such that the center of the second auger casing 2b is positioned on the center line of the joint pitch P of the steel sheet pile 1b. Thereby, the range excluding the joint 13 of the steel sheet pile 1b engaged with the joint 13 of the existing steel sheet pile 15 can be efficiently excavated by the simultaneous excavation of the auger 25 capable of expanding the diameter when the steel sheet pile 1b is press-fitted. it can. At that time, the steel sheet pile 1b and the second auger casing 2b are integrally chucked by the second chuck device 3b, and the engagement plate of the steel sheet pile 1b is inserted into the notch 23a of the guide plate 23 formed at the tip of the second auger casing 2b. Since 16 is engaged, both are not separated.

  FIG. 18A shows the mounting of the second auger casing 2b having the maximum diameter (diameter 355.6 mm) that can be held by the steel sheet pile 1c having a joint pitch P of 600 mm and the steel sheet pile 1b having a joint pitch P of 500 mm. It is a perspective view which shows a state, FIG.18 (b) is the same top view. As shown in the drawing, the steel sheet pile 1c and the second auger casing 2b are arranged in the direction of travel F for the center of the second auger casing 2b to press the steel sheet pile 1c continuously from the center line of the joint pitch P of the steel sheet pile 1c. Install it eccentrically by a predetermined distance. Therefore, one of the engagement plates 16 formed at the tip of the steel sheet pile 1c is formed as a long engagement plate 16a having a V-shaped cross section, and the other is formed as a short engagement plate 16b. By engaging the engaging plates 16a and 16b with the notch 23a of the guide plate 23 of the second auger casing 2b, the steel sheet pile 1c and the second auger casing 2b can be mounted eccentrically.

  Thereby, the range except the joint 13 of the steel sheet pile 1c engaged with the joint 13 of the existing steel sheet pile 15 can be efficiently excavated by simultaneous excavation of the auger 25 capable of expanding the diameter when the steel sheet pile 1c is press-fitted. it can. At that time, the steel sheet pile 1c and the second auger casing 2b are integrally chucked by the second chuck device 3b, and the engagement plate of the steel sheet pile 1c is formed in the notch 23a of the guide plate 23 formed at the tip of the second auger casing 2b. Since 16a and 16b are engaged, they are not separated.

In the auger combined steel sheet pile press-in method, the following items are required.
A. Excavating the press-fitted ground of the steel sheet pile 1 to be pressed as much as possible by simultaneous excavation of the auger 25 when the steel sheet pile 1 is press-fitted.
A. Exactly excavating the auger 25 simultaneously when the steel sheet pile 1 is press-fitted in the press-fitting direction of the steel sheet pile 1.
C. The simultaneous excavation of the auger 25 during the press-fitting of the steel sheet pile 1 should not result in excessive excavation that reduces the peripheral frictional resistance force of the steel sheet pile 1 to be press-fitted.
D. The range of simultaneous excavation of the auger 25 when the steel sheet pile 1 is press-fitted shall be the minimum necessary range.

  According to the present invention, after satisfying the above items (a) to (d), the earth removal efficiency in the simultaneous excavation of the auger 25 at the time of press-fitting of the steel sheet pile 1 is improved, and both work efficiency and economy are realized in a balanced manner. can do. Therefore, as an example of a case where a steel sheet pile 1a having a joint pitch of 400 mm, a steel sheet pile 1b having a joint pitch of 500 mm, and a steel sheet pile 1c having a 600 mm joint are press-fitted as the steel sheet pile 1, the auger combined steel sheet pile press-in method according to the present invention is described with reference to FIG. explain.

  The characteristics of the auger combined steel sheet pile press-fitting method according to the present invention are the same steel sheet pile press-fitting and drawing machines 50, and (U-shaped) steel sheet piles 1 (1a, 1b, 1c) having different joint pitches P Joints are used together by excavating with an auger 25 using auger casings 2 (first auger casing 2a, second auger casing 2b) having different diameters according to the joint pitch P of the sheet pile 1 (1a, 1b, 1c). 13 is meshed and continuously press-fitted.

  As shown in FIG. 1, in the present invention, the first chuck device 3a and the second chuck device 3b are exchanged and used as the chuck device 3 for chucking with the chuck frame 4 in the same steel sheet pile press-fitting machine 50. To do. In this way, by replacing the first chuck device 3a and the second chuck device 3b and appropriately recombining the clamp members 52a, 52b, and 52c constituting the known clamp device 52, the joint pitch P is about 200 mm or more. A plurality of steel sheet piles 1 having differences can be press-fitted using the same steel sheet pile press-fitting and drawing machine 50.

  Then, the chuck device 3 can insert the steel sheet pile 1 and the auger casing 2 into the insertion port 31 and chuck them as a unit by the chuck portion 32. Then, the steel sheet pile 1 and the auger casing 2 can be press-fitted into the ground by the lifting and lowering operation of the steel sheet pile press-fitting cylinder 59, and the press-fitting is performed by the rotation of the auger 25 attached to the tip of the screw rod 24 inserted into the auger casing 2. The ground can be excavated simultaneously at the time of press fitting. Therefore, according to the steel sheet pile press-fitting and drawing machine 50, it is possible to press-fit the steel sheet pile 1 into the ground by using excavation by the auger 25 together.

  In the present invention, the first chuck device 3a is mounted on the chuck frame 4, and the maximum diameter (diameter 318) that can be held by the first chuck device 3a in the steel sheet pile 1a having a joint pitch of 400 mm and the recess 14 of the steel sheet pile 1a. The steel sheet pile 1a is press-fitted into the ground together with excavation by the auger 25 at the time of press-fitting.

  Further, instead of the steel sheet pile 1a, a steel sheet pile 1b with a joint pitch P of 500 mm or a steel sheet pile 1c with a joint pitch P of 600 mm can be press-fitted with the same steel sheet pile press-in / drawer 50 together with excavation by the auger 25. it can. In order to press-fit the steel sheet pile 1b, first, the second chuck device 3b is selected as the chuck device 3, the second chuck device 3b is mounted on the chuck frame 4, and the joint pitch P is 500 mm on the second chuck device 3b. The steel sheet pile 1b is inserted through the second auger casing 2b having the maximum diameter (diameter 355.6 mm) that can be held in the steel sheet pile 1b and the recess 14 of the steel sheet pile 1b. Is pressed into the ground.

  In order to press-fit the steel sheet pile 1c, first, the second chuck device 3b is selected as the chuck device 3, the second chuck device 3b is mounted on the chuck frame 4, and the joint pitch P is 600 mm on the second chuck device 3b. Progression for continuously press-fitting the steel sheet pile 1c into the second auger casing 2b having the maximum diameter (diameter 355.6 mm) that can be held in the recess 14 of the steel sheet pile 1c and the steel sheet pile 1b having a joint pitch P of 500 mm. The steel sheet pile 1c is press-fitted into the ground together with excavation by the auger 25 at the time of press-fitting. That is, the steel sheet pile 1a having a joint pitch P of 400 mm uses the first auger casing 2a having the maximum diameter (diameter 318.5 mm) that can be held in the recess 14 of the steel sheet pile 1a, and the joint pitch P is 500 mm. The steel sheet pile 1b and the steel sheet pile 1c having a joint pitch P of 600 mm are press-fitted using the second auger casing 2b having the maximum diameter (diameter 355.6 mm) that can be held in the recess 14 of the steel sheet pile 1b.

  Specifically, the base 51 is installed by grasping the existing steel sheet pile 15 including the leading steel sheet pile 15 with the clamp device 52 among the plurality of existing steel sheet piles 15 press-fitted with the joints 13 engaged with each other. The steel sheet pile 1a and the first auger casing 2a, which are press-fitted with a joint pitch P of 400 mm, are inserted into the first chuck device 3a for chucking, or the second chuck device 3b is connected to the joint. A steel sheet pile 1b with a pitch P of 500 mm or a steel sheet pile 1c with a joint pitch P of 600 mm and a second auger casing 2b are inserted and chucked, and pressed into the open joint 13 of the existing leading steel sheet pile 15. The joint 13 of the sheet pile 1 is engaged and press-fitted continuously.

  Note that when the steel sheet pile 1 is press-fitted, the tip of the auger casing 2 and the tip of the steel sheet pile 1 are engaged so that the positions of the tip of the steel sheet pile 1 and the tip of the auger casing 2 do not shift. I try to keep it. Further, when the steel sheet pile 1c having a joint pitch P of 600 mm is press-fitted, the second auger casing 2b is held eccentrically in the progress direction F of the press-fitting construction of the steel sheet pile 1.

  According to the auger combined steel sheet pile press-in method according to the present invention, a plurality of chuck devices corresponding to the joint pitch of the steel sheet piles can be detachably attached to the chuck frame of the steel sheet pile press-out machine. It is possible to replace the chuck device. Then, it becomes possible to chuck the steel sheet piles having different joint pitches to the plurality of chuck devices and the auger casing having the maximum diameter that can be held in the recesses of the steel sheet piles. Therefore, excavation by an auger at the time of press-fitting can be performed using an auger casing having a diameter size with good soil removal efficiency according to the joint pitch of steel sheet piles.

  Instead of sharing an auger casing with a diameter that can be used in common with steel sheet piles of joint pitches of all sizes as press-fitting objects in the conventional construction method, multiple chuck devices are pressed into the same steel sheet pile. In the present invention used in the drawing machine, by selecting the diameter size of the auger casing for each of the plurality of chuck devices in units of the chuck device, the soil removal efficiency can be improved according to the joint pitch of the steel sheet piles to be press-fitted. In addition, the construction efficiency in the auger combined steel sheet pile press-in method can be improved and the construction period can be shortened.

  Specifically, when a steel sheet pile having a joint pitch of 400 mm, 500 mm, and 600 mm is press-fitted with the same steel sheet pile press-and-puller together with excavation by an auger, the chuck device is for a steel sheet pile with a joint pitch of 400 mm. The first chuck device and the second chuck device for the joint pitches 500 mm and 600 mm are used. Then, a steel sheet pile having a joint pitch of 400 mm and a first auger casing having a maximum diameter that can be held in the concave portion of the steel sheet pile are inserted into the first chuck device, and a U-shaped steel sheet pile having a joint pitch of 400 mm is ground. The steel sheet pile with a joint pitch of 500 mm or 600 mm and the second auger casing having the maximum diameter that can be held in the recess of the steel sheet pile with a joint pitch of 500 mm are inserted into the second chuck device and the joint pitch of 500 mm or A 600 mm U-shaped steel sheet pile can be pressed into the ground.

  As a result, using a steel sheet pile press-fitting machine capable of press-fitting a steel sheet pile with a joint pitch of 400 mm together with excavation by an auger, a steel sheet pile with a joint pitch of 500 mm and 600 mm can be press-fitted together with excavation by an auger, The soil removal efficiency during excavation can be improved. That is, any steel sheet pile with a joint pitch of 400 mm, 500 mm, and 600 mm can be excavated with an auger with good earth removal efficiency, and the construction period can be shortened compared to the past. Both the pursuit of construction efficiency for shortening the construction period by improving the soil removal efficiency during excavation can be realized in a balanced manner. Therefore, it is possible to deal with urgent work such as restoration work and countermeasure work caused by disasters such as earthquakes and tsunamis, for example, embankment construction work and dike reconstruction work.

DESCRIPTION OF SYMBOLS 1 ... Steel sheet pile 1a ... Steel sheet pile with a joint pitch of 400 mm 1b ... Steel sheet pile with a joint pitch of 500 mm 1c ... Steel sheet pile with a joint pitch of 600 mm 11 ... Web 12 ... Flange 13 ... Joint 14 ... Recessed 15 ... Existing steel sheet pile 16 ... engagement plate P ... joint pitch 2 ... auger casing 2a ... first auger casing 2b ... second auger casing 21 ... fixing plate 22 ... close plate 23 ... guide plate 23a ... notch 24 ... screw rod 25 ... auger 26 ... soil removal Port 27 ... Auger excavator 28 ... Hydraulic hose winder 3 ... Chuck device 3a ... First chuck device 3b ... Second chuck device 31,31a, 31b ... Through hole 32,32a, 32b ... Chuck portions 33,33a, 33b ... Chuck ring gear 34, 34a, 34b ... Flange 4 ... Chuck frame 41 ... Groove 42 ... Lont cover 50 ... Steel sheet pile press-fitting / drawing machine 51 ... Base 52 ... Clamping device 52a, 52b, 52c ... Clamp member 53 ... Slide base 54 ... Turntable 55 ... Bearing part 56 ... Support arm 57 ... Guide frame 58 ... Lifting body 59 ... Steel Sheet pile press-fit pull-out cylinder

Claims (7)

  Using the same steel sheet pile press-fitting machine, U-shaped steel sheet piles with different joint pitches can be used together with excavation by an auger using an auger casing with different diameters according to the joint pitch of the steel sheet piles. An auger combined steel sheet pile press-fit method characterized by continuously press-fitting a joint. The maximum diameter that can be held in the recess of the steel sheet pile as an auger casing when press fitting a U-shaped steel sheet pile with a joint pitch of 400 mm, using a joint pitch of 400 mm, 500 mm, 600 mm as a U-shaped steel sheet pile Use an auger casing with
An auger casing having a maximum diameter that can be held in a recess of a steel sheet pile with a joint pitch of 500 mm is used as an auger casing when a U-shaped steel sheet pile with a joint pitch of 500 mm or 600 mm is press-fitted. Combined steel sheet pile press-in method.   As a steel sheet pile press-in / pull-out machine, a pedestal with a clamping device disposed below, a slide base that is slidably disposed on the pedestal, a turntable that is pivotally disposed on the slide base, and a turntable Equipped with a standing guide frame, a lifting body mounted on the guide frame so as to be movable up and down and attached with a steel sheet pile press-in / pull-out cylinder, a chuck frame formed below the lifting body, and a swivel within the chuck frame Drilling with auger and steel using a steel sheet pile press-fitting / removing machine that is detachably equipped with a first chuck device or a second chuck device that can be inserted and chucked through a U-shaped steel sheet pile and an auger casing. The U-shaped steel sheet pile is meshed with each other by jointly using a sheet pile press-fitting cylinder and continuously press-fitted into the ground. Auger combination steel sheet pile press-fit method.   4. The auger according to claim 3, wherein when the steel sheet pile is press-fitted, the tip of the auger casing and the tip of the steel sheet pile are engaged so that the positions of the tip of the steel sheet pile and the tip of the auger casing do not shift. Combined steel sheet pile press-in method. A U-shaped steel sheet pile having a joint pitch of 400 mm is inserted into the first chuck device through a U-shaped steel sheet pile having a joint pitch of 400 mm and a first auger casing having a maximum diameter that can be held in the recess of the steel sheet pile. Is pressed into the ground,
A U-shaped steel sheet pile with a joint pitch of 500 mm or 600 mm and a second auger casing having a maximum diameter that can be held in a recess of the steel sheet pile with a joint pitch of 500 mm are inserted into the second chuck device, and the joint pitch is 500 mm. Alternatively, the auger combined steel sheet pile press-in method according to claim 3 or 4, wherein a 600 mm U-shaped steel sheet pile is press-fit into the ground.   The base is placed on the existing U-shaped steel sheet pile by gripping the existing U-shaped steel sheet pile including the leading steel sheet pile among the plurality of existing steel sheet piles press-fitted with the joints engaged with each other. In a fixed state, a U-shaped steel sheet pile and a first auger casing with a joint pitch of 400 mm are inserted into the first chuck device for chucking, or a joint pitch of 500 mm or 600 mm is press-fitted into the second chuck device. 6. The U-shaped steel sheet pile and the second auger casing are inserted and chucked, and the joint of the U-shaped steel sheet pile to be press-fitted is engaged with the open joint of the leading U-shaped steel sheet pile, and press-fitted. The described auger combined steel sheet pile press-in method.   7. The auger combined steel sheet pile press-in method according to claim 5 or 6, wherein when a U-shaped steel sheet pile with a joint pitch of 600 mm is press-fitted, the second auger casing is held eccentrically in the direction of press-fitting of the steel sheet pile. .

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