JP2012102521A - Circular installation method of steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circular installation method of steel sheet piles capable of accurately installing the steel sheet piles by holding the upper end part of a preceding steel sheet pile in a stable state by a clamp part of a self traveling movement type press-in device when connecting a plurality of the steel sheet piles in a circular arcuate shape of a small curvature radius and pressing and installing them.SOLUTION: In the circular installation method of steel sheet piles 11 using a self traveling movement type press-in device 10, to the distal end side first and distal end side third preceding steel sheet piles 11'a and 11'c, in the state of respectively interposing an adjusting attachment plate 20 having a tapered part 20a of a taper angle α corresponding to a crossing angle θ of the tangential direction s2 of the distal end side second preceding steel sheet pile 11'b and the tangential directions s1 and s3 of the distal end side first or distal end side third preceding steel sheet pile 11'a or 11'c between front and back holding surfaces 21, the upper end parts of the distal end side first and distal end side third preceding steel sheet piles 11'a and 11'c are held by the clamp part 14 of the self traveling movement type press-in device 10, and the next steel sheet pile 11 is pressed in and installed underground.

Description

  TECHNICAL FIELD The present invention relates to a method for circularly placing steel sheet piles, and in particular, supporting a press-fitting reaction force on a preceding steel sheet pile previously placed in the ground, and a continuous direction of steel sheet piles along the upper end portion of the preceding steel sheet pile. It is related with the circular placement method of the steel sheet pile using the self-propelled movement press-fitting apparatus which carries out the self-propelled movement to the steel sheet pile, and press-fits the steel sheet pile sequentially.

  For example, prior to the excavation work of the ground surface, the steel sheet piles are continuously formed in the ground to form a continuous wall for retaining, mainly U-shaped steel sheet piles and hat-shaped steel sheet piles. Z-shaped steel sheet piles are used. As a method of placing a steel sheet pile into the ground, for example, a vibration placement method using a vibro hammer or a press-in placement method using a press-fitting device is known, but in recent years the surrounding environment has been considered. In many cases, a press-fitting method is employed.

  In addition, various heavy equipment and devices are used as the press-fitting device used in the steel sheet pile press-fitting method. For example, as a device suitable for construction in a narrow work yard in an urban area, a self-propelled mobile press-fitting device is used. An apparatus is known (see, for example, Patent Document 1). The self-propelled movable press-fitting device is provided, for example, with a saddle portion including a plurality of sets of clamp portions for gripping the upper end portion of a preceding steel sheet pile previously placed in the ground, and is slidable relative to the saddle portion. Slide base portion, a swivel portion provided so as to be turnable with respect to the slide base portion, and a press-fitting press fit provided with a chuck portion that is provided so as to be able to move up and down relative to the swivel portion and grips a steel sheet pile to be press-fitted. The upper end portion of the preceding steel sheet pile is held by the clamp portion to support the press-fitting reaction force on the preceding steel sheet pile, and the steel sheet pile is automatically provided along the upper end portion of the preceding steel sheet pile. The steel sheet piles are sequentially press-fitted while running.

JP 2000-2069 A

  For example, when a continuous wall surrounding the shaft is formed using the self-propelled moving press-fitting device as described above, the self-propelled moving press-fitting device includes a mechanism that allows the slide base portion to slide relative to the saddle portion, Since the turning part has a mechanism that can turn with respect to the slide base part, a large number of steel sheet piles are arranged in a rectangular shape by press-fitting the steel sheet piles in the direction bent at the corner part. Thus, for example, a shaft having a rectangular hollow cross-sectional shape can be formed. Moreover, by carrying out curve construction, a large-scale structure having a circular hollow cross-sectional shape with a diameter of, for example, about 16 to 25 m is provided by arranging a large number of steel sheet piles so as to draw an arc shape having a relatively large curvature radius. It becomes possible to form a vertical shaft.

  On the other hand, for example, in a narrow work yard, when forming a small and medium-sized shaft having a circular hollow cross-sectional shape with a diameter of about 7 to 16 m, for example, an arc shape with a relatively small curvature radius is drawn. It is difficult to grip the upper end of the preceding steel sheet pile in a stable state by the clamp part, and the upper end of the preceding steel sheet pile is damaged. It is difficult to press-fit and place the sheet piles in a circular arc shape with high accuracy. That is, if the radius of curvature is small, the bending angle for conforming to the planned arc shape increases between a pair of adjacent steel sheet piles adjacent to each other. For example, in one set of a plurality of clamp parts of the saddle part , If one of the preceding steel sheet piles is gripped along the gripping surface, the gripping surface of the other preceding steel sheet pile will be disposed obliquely at a considerable angle with respect to the other set of clamp parts. It is difficult to grip the upper end of the other preceding steel sheet pile in a stable state with a stable gripping area.

  The present invention stabilizes the upper end of the preceding steel sheet pile by the clamp part of the self-propelled moving press-fitting device even when a plurality of steel sheet piles are connected in a line so as to draw an arc shape with a small radius of curvature. It is an object of the present invention to provide a steel sheet pile circular placing method that can be gripped in a state where the steel sheet piles are connected in a circular arc shape and can be press-fitted with high precision.

  The present invention includes a saddle portion including a plurality of sets of clamp portions for gripping the upper end portion of a preceding steel sheet pile previously placed in the ground, a slide base portion provided slidably with respect to the saddle portion, A swivel portion provided so as to be capable of swiveling with respect to the slide base portion, and a lift press-fitting portion provided with a chuck portion for gripping a steel sheet pile to be press-fitted provided so as to be able to move up and down relative to the swivel portion Self-propelled to support press-fitting reaction force on the preceding steel sheet pile and to self-propelled in the connecting direction of the steel sheet pile along the upper end portion of the preceding steel sheet pile, and sequentially press-fit the steel sheet pile A steel sheet pile circular driving method using a movable press-fitting device, wherein the preceding steel sheet piles are at least the first tip side and the third tip side of the preceding steel sheet piles arranged continuously in an arc shape. And the tangential direction of the second preceding steel sheet pile on the tip side, and An adjustment attachment plate having a taper portion having a taper angle corresponding to the angle of intersection with the tangential direction of the first steel sheet pile at the end side or the third at the front end side, the first steel at the front end side and the third at the front end side. In the state of being interposed between the front and back gripping surfaces of the sheet pile, the upper end portions of the first steel sheet pile at the front end side and the third at the front end side are gripped by the clamp portion of the self-propelled moving press-fitting device. And the said objective is achieved by providing the circular placement method of the steel sheet pile which press-fits the following steel sheet pile in the ground.

  Further, the steel sheet pile circular driving method of the present invention is characterized in that the adjustment attachment plate includes a locking metal fitting at an upper end edge of the preceding steel sheet pile at an upper end portion thereof, and a lower end portion thereof. In addition, a magnet member that is bonded to the surface of the preceding steel sheet pile is provided, and prior to the clamp portion gripping the upper end portions of the first steel sheet pile at the front end side and the third front end side, The locking bracket is engaged with the upper edge of the preceding steel sheet pile, the magnet member is adhered to the surface of the preceding steel sheet pile, and the adjustment attachment plate is moved along the front and back gripping surfaces of the preceding steel sheet pile. It is preferable to position at a predetermined position.

  According to the steel sheet pile circular driving method of the present invention, even when a plurality of steel sheet piles are connected and press-fitted so as to draw an arc shape with a small radius of curvature, the clamp of the self-propelled mobile press-fitting device The upper end portion of the preceding steel sheet pile can be gripped in a stable state by the portion, and the steel sheet pile can be connected in a circular arc shape and can be press-fitted with high accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view illustrating a self-propelled moving press-fitting device used in a circular sheet pile placing method according to a preferred embodiment of the present invention. It is a schematic top view explaining the shaft which has the circular hollow cross-sectional shape formed by the circular placement method of the steel sheet pile concerning one preferable embodiment of this invention. It is a schematic side view explaining the construction situation of the circular placement method of the steel sheet pile according to a preferred embodiment of the present invention. It is a schematic expanded top view explaining the construction situation of the circular placement method of the steel sheet pile according to a preferred embodiment of the present invention. The structure of the adjustment attachment board used for the circular placement method of the steel sheet pile which concerns on preferable one Embodiment of this invention is demonstrated, (a) is a top view, (b) is a front view, (c) is a left view. is there. It is a perspective view of the adjustment attachment board used for the circular placement method of the steel sheet pile concerning one preferred embodiment of the present invention.

  A steel sheet pile circular driving method according to a preferred embodiment of the present invention is a method of driving a plurality of U-shaped steel sheet piles 11 into the ground using a known self-propelled mobile press-fitting device 10 as shown in FIG. Thus, for example, as shown in FIG. 2, the steel sheet piles 11 are continuously arranged in the ground so as to draw a circle having a diameter of about 7 to 16 m, thereby forming the plurality of U-shaped steel sheet piles 11. This is employed when a small and compact shaft 13 having a continuous wall 12 as a surrounding mountain retaining wall is formed, for example, in a narrow work yard in an urban area. In addition, the circular placement method of the present embodiment sequentially and accurately supports each steel sheet pile 11 in a state where the press reaction force is stably supported by the preceding steel sheet pile 11 along a planned arc-shaped continuous arrangement direction. It was adopted so that it could be pressed into the ground.

  Here, the self-propelled moving press-fitting device 10 includes a saddle portion 15 including a plurality of sets of clamp portions 14 that grip the upper end portion of the preceding steel sheet pile 11 ′ that has been placed in advance in the ground, and the saddle portion 15 The slide base portion 16 provided so as to be slidable, the turning portion 17 provided so as to be able to turn with respect to the slide base portion 16, and the press-fitting provided so as to be movable up and down with respect to the turning portion 17. And an up-and-down press-fit portion 19 including a chuck portion 18 for gripping the steel sheet pile 11, and the clamp portion 14 grips the upper end portion of the preceding steel sheet pile 11 ′ to support the press-fit reaction force on the preceding steel sheet pile 11 ′. At the same time, a mechanism is provided in which the steel sheet piles 11 are sequentially press-fitted and driven while being self-propelled and moved in the connecting direction of the steel sheet piles 11 along the upper end of the preceding steel sheet pile 11 '.

  In the present embodiment, the self-propelled moving press-fitting device 10 presses and inserts several initial steel sheet piles 11 using, for example, a reaction force stand (not shown), and then uses these initial steel sheet piles 11 as the preceding steel. The steel sheet piles 11 can be sequentially pressed and driven while being gripped by the clamp portion 14 as the sheet pile 11 ′ and supporting the press-fitting reaction force. Then, the self-propelled moving press-fitting device 10 press-fits the next steel sheet pile 11 and then press-fits the next steel sheet pile 11 while holding the preceding steel sheet pile 11 ′ with the clamp portion 14. Then, when the next steel sheet pile 11 is press-fitted to a depth sufficient to support the weight of the self-propelled mobile press-fitting device 10, the further steel sheet pile 11 is gripped by the chuck portion 18 of the up-down press-fit portion 19. In the state, the clamp part 14 holding the preceding steel sheet pile 11 ′ is opened and the self-propelled moving press-fitting device 10 is raised. When the self-propelled mobile press-fitting device 10 is raised, the saddle portion 15 is moved forward by one sheet of the preceding steel sheet pile 11 ′, and the self-propelled mobile press-fitting device 10 is lowered at the next reaction force support position. After confirming the above, the reaction force base is newly constructed by closing the clamp portion 14 again, and the next steel sheet pile 11 is continuously press-fitted. In this way, the self-propelled moving press-fitting device 10 sequentially press-fits the steel sheet piles 11 while self-propelling and moving in the connecting direction of the steel sheet piles 11 along the upper end portion of the preceding steel sheet pile 11 '. It has a mechanism that can.

  Further, in the present embodiment, the self-propelled movable press-fitting device 10 includes a configuration in which the slide base portion 16 is slidable linearly along the continuous direction of the steel sheet pile 11 with respect to the saddle portion 15. Yes. Each of the plurality of sets of clamp portions 14 is configured to be slidable in a direction perpendicular to the slide direction of the slide base portion 16 with respect to the saddle portion 15, and is not used for gripping. The self-propelled moving press-fitting device 10 can be used in a state where is appropriately removed from the position of the preceding steel sheet pile 11 ′, while each clamp portion 14 is rotatable with respect to the saddle portion 15. It does not have a simple structure. In the circular placing method of the present embodiment, even if the clamp portion 14 does not have a structure that can rotate with respect to the saddle portion 15, a plurality of steel sheet piles 11 are continuously provided so as to draw an arc shape with a small radius of curvature. When the press-fitting is performed, the upper end portion of the preceding steel sheet pile 11 ′ can be stably held by the clamp portion 14, and the steel sheet pile 11 is connected in a circular arc shape with a high precision press-fitting. To be able to go.

  And the circular placement method of this embodiment is a circular placement method of the steel sheet pile 11 using the self-propelled movable press-fitting device 11 provided with the above-mentioned structure, Comprising: As shown in FIG.3 and FIG.4, circular arc The leading steel sheet pile 11 ′ (see FIG. 4) that is continuously provided in the shape of the leading steel sheet pile 11′a, 11′c at the leading end side and the third leading steel sheet pile 11′a, 11′c Intersection angle θ between the tangential direction s2 of the preceding steel sheet pile 11′b and the tangential directions s1, s3 of the first or third leading steel sheet pile 11′a, 11′c (see FIG. 4, for example, The adjustment attachment plate 20 (see FIG. 6) having a taper portion 20a having a taper angle α (see FIG. 5; for example, about 5 °) corresponding to about 5 ° is used as the leading steel sheet pile on the tip side and the tip side third. 11'a and 11'c are self-propelled in a state of being interposed between the front and back gripping surfaces 21 respectively. The clamp part 14 of the dynamic press-fitting device 10 grips the upper ends of the first and third leading steel sheet piles 11′a and 11′c, and press-fits the next steel sheet pile 11 into the ground. It is supposed to be.

  Moreover, in this embodiment, as shown in FIGS. 5 (a) to 5 (c) and FIG. 6, the adjustment attachment plate 20 is engaged with the upper end edge of the preceding steel sheet pile 11 at the upper end thereof. A clamp member 14 is provided with a magnet member 23 that is bonded to the surface of the preceding steel sheet pile 11 at the lower end portion thereof, and the clamp portion 14 is the first and third leading steel sheet piles 11 ′ on the distal end side. Prior to gripping the upper ends of a and 11'c, the locking bracket 22 is engaged with the upper edges of the preceding steel sheet piles 11'a and 11'c, and the magnet member 23 is attached to the preceding steel sheet pile 11 '. Attaching to the surfaces of a and 11'c, the adjustment attachment plate 20 is positioned at a predetermined position along the front and back gripping surfaces 21 of the preceding steel sheet piles 11'a and 11'c.

  Here, in this embodiment, the front end side first preceding steel sheet pile 11′a, the front end side second preceding steel sheet pile 11′b, and the front end side third preceding steel sheet pile 11′c are shown in FIGS. As shown in FIG. 1, among the preceding steel sheet piles 11 ′ simultaneously held by the plurality of sets of clamp portions 14 of the self-propelled movable press-fitting device 10, the first, second, Alternatively, it means the third preceding steel sheet pile 11′c, and when the next steel sheet pile 11 is further press-fitted on the tip side as described above, it is 2 The third, fourth, or fourth preceding steel sheet pile 11 'is the first leading steel sheet pile 11'a, the second leading steel sheet pile 11'b, or the third leading steel sheet pile, respectively. 11′c.

  In the present embodiment, the tangential directions s1, s2, and s3 of the preceding steel sheet piles 11'a, 11'b, and 11'c that are continuously provided in an arc shape are the respective preceding steel sheet piles 11'a, 11′b and 11′c can be replaced as the direction in which the centers of the section portions on both sides are connected (see FIG. 4). Furthermore, the holding surfaces 21 on the front and back of the preceding steel sheet piles 11′a, 11′b, 11′c are intermediate sides between the oblique side parts on both sides of the U-shaped steel sheet pile 11 each having a section at the tip. Consists of front and back surfaces of the part.

  And in this embodiment, the adjustment attachment board 20 which has the taper part 20a is interposed between the front and back holding surfaces 21 of the first and third leading steel sheet piles 11′a and 11′c, respectively. In this state, the upper end portions of the first and third leading steel sheet piles 11'a and 11'c are gripped by the clamp portion 14 of the self-propelled movable press-fitting device 10, and the next steel sheet pile 11 Is pressed into the ground.

  The adjustment attachment plate 20 is formed by processing a steel plate having a thickness of, for example, about 9 mm. As shown in FIGS. 5A to 5C and FIG. 6, for example, the adjustment attachment plate 20 has a width of about 125 mm and a length of about 450 mm. It has a vertically long rectangular front shape. Further, the adjustment attachment plate 20 is provided with the front side so that the thickness of the right side portion is gradually reduced except for the belt-like edge portion 20b having a width of about 45 mm on the left side in the front view of FIG. By cutting obliquely, a tapered portion 20a having a taper angle α of, for example, about 5 ° is formed. Further, as described above, the adjustment attachment plate 20 is welded and fixed to the upper end corner portion of the belt-like edge portion 20b, and a metal locking metal member 22 having a U-shape is formed on the back side of the upper end corner portion. The magnet member 23 is attached by being fixedly bonded so as to protrude downward from the lower end portion of the belt-like edge portion 20b.

  In this embodiment, the front end side first preceding steel sheet pile 11'a, the front end side second preceding steel sheet pile 11'b, and the front end side third by the three sets of clamp portions 14 of the self-propelled moving press-fitting device 10. Prior to simultaneously grasping the upper end portion of the preceding steel sheet pile 11′c, the top end portion of the first leading steel sheet pile 11′a and the third leading steel sheet pile 11′c of the leading end side of these The adjustment attachment plates 20 are respectively arranged along the front and back gripping surfaces 21. That is, along the holding surfaces 21 on the front and back of the upper end portions of the respective preceding steel sheet piles 11′a and 11′c, the pair of adjustment attachment plates 20 are arranged in the direction in which the steel sheet piles 11 are arranged at the distal ends of these tapered portions 20a. (The tip end side of the tapered portion 20a of one attachment plate 20 is on the front side in the connecting direction, and the tip end side of the tapered portion 20a of the other attachment plate 20 is on the rear side in the connecting direction) Are disposed on the surfaces on both sides of the intermediate side of each of the preceding steel sheet piles 11′a and 11′c, respectively, so that they are respectively attached to predetermined positions on the gripping surface 21. These attaching operations can be easily and smoothly performed using the above-described locking metal fittings 22 and magnet members 23 attached to the adjustment attachment plate 20, respectively.

  Thereby, in this embodiment, by attaching the adjustment attachment board 20 to the holding surface 21 of the front and back, respectively at the front end side first preceding steel sheet pile 11′a and the front end side third preceding steel sheet pile 11′c. The new gripping surface 21 arranged in parallel or substantially parallel to the gripping surface 21 of the second leading steel sheet pile 11′b on the distal end side to which the adjustment attachment plate 20 is not attached is formed by each surface of the adjustment attachment plate 20. 'Will be formed.

  And according to the circular placement method of the steel sheet pile of the present embodiment, even when a plurality of steel sheet piles 11 are connected in series so as to draw an arc shape with a small radius of curvature, the self-propelled moving type The upper end of the preceding steel sheet piles 11'a, 11'b, 11'c can be gripped in a stable state by the clamp part 14 of the press-fitting device 10, and the steel sheet piles 11 are connected in a circular arc shape and press-fitted with high accuracy. You can cast it.

  In other words, according to the present embodiment, the first and third leading steel sheet piles 11′a and 11′c on the tip side have the tangential directions s1 and s3 and the second leading steel sheet pile 11 ′ on the tip side. The adjustment attachment plate 20 having the taper portion 20a having the taper angle α corresponding to the crossing angle θ with the tangential direction s2 of b is attached along the holding surface 21 on the front and back, so that each surface of the adjustment attachment plate 20 Since a new gripping surface 21 ′ is formed which is arranged in parallel or substantially parallel to the gripping surface 21 of the second leading steel sheet pile 11 ′ b on the tip side to which the adjustment attachment plate 20 is not attached, The leading steel sheet piles 11′a, 11′b, 11′c of the tip side first, tip side second, and tip side third arranged in parallel or substantially parallel to each other are equivalent by three sets of clamp portions 14. Gripping surface By simultaneously gripping with the product, the next steel sheet pile 11 can be connected in a circular arc shape and can be press-fitted in a precise and stable state.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the steel sheet pile circular casting method of the present invention can be employed when constructing a large-scale circular shaft as well as a small and medium-sized circular shaft, and the continuous wall formed by the steel sheet pile is Other than the continuous wall around the shaft, it may be another continuous wall for earth retaining. It can also be adopted when forming a continuous wall including other arc-shaped portions other than a circular closed continuous wall. Further, in addition to the first leading steel sheet pile and the third leading steel sheet pile, for example, the adjustment attachment plate can be attached to the fourth leading steel sheet pile on the distal end side, and the present invention can be carried out.

  Further, the adjustment attachment plate does not necessarily have to be attached to the gripping surface of the preceding steel sheet pile by the locking metal provided at the upper edge or the magnet provided at the lower edge. For example, a pair of adjustment attachment plates arranged on the front and back gripping surfaces of the preceding steel sheet pile are connected at the upper end to form an integral U-shaped cross-sectional shape, and the top surface is in the space between the pair of adjustment attachment plates. It is also possible to insert the upper end portion of the preceding steel sheet pile until it comes into contact with the upper end connecting portion, and to attach the pair of adjustment attachment plates to the upper end portion of the preceding steel sheet pile. In addition, the operation rod is protruded laterally from the outer surface of the adjustment attachment plate, and the operation rod is integrated and fixed, and until the preceding steel sheet pile is gripped by the clamp portion, the operator can move the adjustment attachment plate through the operation rod. Positioning can also be performed.

DESCRIPTION OF SYMBOLS 10 Self-propelled movement press-fitting apparatus 11 'Prior steel sheet pile 11'a The first preceding steel sheet pile 11'b at the front end side The second preceding steel sheet pile 11'c at the front end side The third preceding steel sheet pile 12 at the front end side Continuous wall 13 Vertical shaft 14 Clamp part 15 Saddle part 16 Slide base part 17 Swivel part 18 Chuck part 19 Lifting press-fit part 20 Adjustment attachment plate 20a Tapered part 20b Strip edge part 21 Grasp surface 21 'New grip surface 22 Locking bracket 23 Magnet members s1, s2 , S3 Tangential direction θ Tangential direction crossing angle α Taper angle

Claims (2)

A saddle portion having a plurality of sets of clamp portions for gripping an upper end portion of a preceding steel sheet pile previously placed in the ground, a slide base portion provided slidably movable with respect to the saddle portion, and the slide base portion A swivel portion provided so as to be capable of swiveling with respect to the swivel portion, and a lifting / lowering press-fitting portion provided with a chuck portion for gripping a press-fitted steel sheet pile provided so as to be able to move up and down relative to the swivel portion. A self-propelled moving press-fitting device that supports the press-fitting reaction force on the steel sheet pile and moves in the direction of the steel sheet pile along the upper end of the preceding steel sheet pile, and press-fits the steel sheet pile sequentially. A steel sheet pile circular casting method using
The tangential direction of the leading steel sheet pile second on the tip side and the leading edge of the leading steel sheet pile at the leading end side and the third leading end side of the preceding steel sheet pile placed continuously in an arc shape An adjustment attachment plate having a taper portion having a taper angle corresponding to an angle of intersection with the tangential direction of the first steel sheet pile on the first side or the third on the front edge side, the first steel sheet pile on the front end side and the third on the front end side. The upper end portions of the first steel sheet pile at the front end side and the third at the front end side are gripped by the clamp portion of the self-propelled movable press-fitting device in a state of being interposed between the front and back grip surfaces. The steel sheet pile circular casting method in which the following steel sheet pile is press-fitted into the ground.   The adjustment attachment plate includes a locking member that is engaged with an upper end edge portion of the preceding steel sheet pile at an upper end portion thereof, and a magnet member that is bonded to a surface of the preceding steel sheet pile at a lower end portion thereof. Prior to gripping the upper ends of the first and third leading steel sheet piles by the clamp portion, the locking bracket is engaged with the upper edge of the preceding steel sheet pile. 2. The steel according to claim 1, wherein the magnet member is adhered to a surface of the preceding steel sheet pile, and the adjustment attachment plate is positioned and arranged at a predetermined position along a front and back gripping surface of the preceding steel sheet pile. Circular sheet pile placement method.

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