JP3191583U6 - Tip wing member for ground reinforcement - Google Patents

Abstract

Provided is a tip wing member for ground reinforcing material which can correspond to a tubular reinforcing material having a plurality of pipe diameters.
As a tip wing member 10 attached to the tip of a tubular reinforcing material that is inserted into the ground while being rotated about an axis, the tip wing member 10 is provided on the outer peripheral surface of a main body 12 having a bottomed cylindrical shape. The helical wing member 14 is fixed, and the upper portion of the main body 12 is formed as a mounting portion 18 which is a tapered outer peripheral surface 20 whose diameter is reduced upward, and the bus bar of the tapered outer peripheral surface 20 A plurality of protrusions 24 extending over the entire length in the direction are integrally provided at predetermined intervals in the circumferential direction, and the mounting portion 18 having such a shape is provided in the front end opening of the reinforcing material. In the configuration in which the reinforcing member is inserted, the front end opening of the reinforcing member and the mounting portion 18 are fixed by welding so that the reinforcing member and the front end wing member 10 can be fixed.
[Selection] Figure 1

Description

  The present invention relates to a tip reinforcing wing member for ground reinforcement, and in particular, can cope with a change in the pipe diameter of a tubular reinforcing material embedded in the ground while being rotated around an axis and penetrated into the ground. The present invention relates to a tip member that can be formed.

  Conventionally, the steel pipe is rotated around its axis and embedded in the ground so that it can be used as a pile-shaped ground reinforcing material to reinforce the ground such as sandy and viscous ground. It has been done. In addition, such a tubular ground reinforcing material is provided with a spiral wing member (blade) at the tip portion that penetrates into the ground so that it can be easily screwed into the ground. Has been.

  For example, as disclosed in Japanese Utility Model Publication No. 4-31317, Japanese Patent Application Laid-Open No. 7-173832, Japanese Patent Application Laid-Open No. 11-93163, Japanese Patent Application Laid-Open No. 2006-9313, Japanese Patent Application Laid-Open No. 2007-77699, etc. A spiral wing member or the like can be attached to the tip of a long ground reinforcing material directly or via a short cylindrical member. In this case, the spiral wing member is fixed in advance to the outer peripheral surface of the cylindrical member by welding or the like, while the upper end portion of the cylindrical member is set against the lower end portion of the long ground reinforcing material. It is used by being fixedly attached by pinning, screwing, welding or the like.

  By the way, the tip wing member in which such a spiral wing member is fixed to the outer peripheral surface of a short cylindrical member is a tubular body of a ground reinforcement material selected for realizing a desired ground reinforcement effect. Prepared in correspondence with the number of the diameters of the steel pipes, one tip wing member is combined with each tubular main body of one pipe diameter, and both of them are integrated by appropriate fixing means. It is attached and used. For this reason, it is necessary to prepare and hold the tip wing member provided with the spiral wing member as many as the diameter of the ground reinforcing material (tubular body), thereby increasing the number of parts. As a result, the cost of the ground reinforcement method as a whole is increased.

Japanese Utility Model Publication 4-31317 JP-A-7-173832 JP-A-11-93163 JP 2006-9313 A JP 2007-77699 A

  Here, the present invention has been made in the background of such circumstances, and the problem to be solved is for a ground reinforcing material that can cope with a plurality of tubular reinforcing materials having a plurality of pipe diameters. The purpose is to provide a tip wing member, and the number of tip wing members to be prepared can be reduced by being able to be attached to a reinforcing material having a plurality of pipe diameters, thereby reducing the cost of the ground reinforcement method. There is also an attempt to reduce it advantageously.

  In the present invention, in order to solve the above-described problems, a tip wing member attached to the tip of a tubular reinforcing material that is embedded in the ground while being rotated around an axis is provided. A structure in which a spiral wing member is fixed to the outer peripheral surface of the cylindrical main body portion, and the upper portion of the main body portion is a mounting portion having a tapered outer peripheral surface whose diameter decreases upward. In the form in which the mounting portion is inserted into the tip opening of the reinforcing member, the tip opening can be fixed to the mounting portion by welding and fixed. The gist of the tip wing member for ground reinforcing material is characterized by the above.

  In such a tip reinforcing wing member for ground reinforcement according to the present invention, a plurality of protrusions extending in the generatrix direction are advantageously formed on the tapered outer peripheral surface of the mounting portion formed on the upper portion of the main body portion. The strips are integrally provided at a predetermined interval in the circumferential direction, and can be welded and fixed to the plurality of projections in a state where the distal end openings of the reinforcing material are in contact with each other. Yes.

  Further, according to an advantageous aspect of the ground reinforcing material tip wing member according to the present invention, the plurality of protrusions are respectively integrated with the tapered outer peripheral surface with a phase difference of 180 ° or less in the circumferential direction. It is arranged.

  Further, in the present invention, preferably, the protrusion is provided in a dimension of width: about 5 mm and height: about 1 mm.

  According to another desirable aspect of the ground reinforcing material front wing member according to the present invention, the tapered outer peripheral surface of the mounting portion forms an angle of about 30 ° to about 60 ° with respect to the axis of the main body portion. It is formed as follows.

  Moreover, according to another preferable aspect of the tip wing member for ground reinforcing material according to the present invention, a cylindrical guide portion is coaxially and integrally provided at an upper end portion that becomes the minimum diameter of the mounting portion. Yes.

  Furthermore, in the present invention, advantageously, the main body portion has a closed bottom portion, and an excavating blade is fixed to the outer surface of the bottom portion.

  Further, in the tip wing member for ground reinforcing material according to the present invention, generally, the reinforcing material is brought into contact with an intermediate portion in the generatrix direction of the tapered outer peripheral surface of the mounting portion so that it can be fixed by welding. Furthermore, since the reinforcing members having different pipe diameters are brought into contact with different positions in the generatrix direction of the tapered outer peripheral surface of the mounting portion and can be fixed by welding. is there.

  As described above, in the tip wing member for ground reinforcement according to the present invention, the upper portion of the cylindrical main body portion in which the spiral wing member is integrally provided on the outer peripheral surface is reduced in diameter upward. The mounting portion having a tapered outer peripheral surface is configured such that the tip opening of the tubular reinforcing material is fixed to the tapered outer peripheral surface by welding. Depending on the ground reinforcement effect to be used, even if reinforcing materials with different pipe diameters are used and the size of the opening of the tip changes, the taper outer peripheral surface of the mounting part located at the upper part of the main body part In this case, it can be brought into contact at any position of the intermediate portion in the generatrix direction, whereby the attachment of the main body and the tip opening of the reinforcing material can be advantageously performed. is there.

  For this reason, since it is sufficient to use one tip blade member for a plurality of reinforcing materials having different tube diameters, it is not necessary to prepare a tip blade member corresponding to the tube diameter of the reinforcing material. As a result, the number of tip blade members to be prepared for many reinforcing materials having different pipe diameters can be reduced, and therefore, it can contribute to the cost reduction of the ground reinforcement method. It became.

  In particular, as in the tip wing member for ground reinforcement defined in claim 2, a plurality of protrusions extending in the generatrix direction are provided on the outer peripheral surface of the mounting portion formed on the upper portion of the main body portion. A tubular reinforcing material and a tubular shape are integrally provided at predetermined intervals in the direction, and are fixed to each of the plurality of protrusions by welding in a form in which the tip opening of the reinforcing material is brought into contact with the plurality of protrusions. As a result, the distance between the tapered outer peripheral surface of the mounting portion and the tip opening of the reinforcing material can be sufficiently increased due to the presence of the protrusion. Since the end opening of the reinforcing material can be welded and fixed to the tapered outer peripheral surface of the mounting portion with a wide welding width, a welded portion having sufficient welding strength can be advantageously realized. is there.

It is front explanatory drawing which shows an example of the tip wing member for ground reinforcement materials according to this invention. It is a plane explanatory view of the tip wing member for ground reinforcement shown in FIG. It is AA cross-section explanatory drawing in FIG. It is bottom face explanatory drawing of the tip wing member for ground reinforcement materials shown by FIG. It is front explanatory drawing which shows the form formed by welding and fixing the front-end | tip wing member for ground reinforcement materials shown in FIG. 1 and a tubular reinforcement material. FIG. 7 is an explanatory cross-sectional view showing an example of different contact forms between the protrusion provided on the tapered outer peripheral surface of the attachment portion formed on the upper portion of the main body portion of the ground reinforcing material front wing member and the front end opening portion of the reinforcing material. (A) is sectional explanatory drawing which shows the state contact | abutted to the protrusion part located in the upper part in the bus-line direction of a taper-shaped outer peripheral surface, (b) is the center in the bus-line direction of a taper-shaped outer peripheral surface. It is sectional explanatory drawing which shows the state contact | abutted to the protrusion part located in a part, (c) is a cross section which shows the state contact | abutted to the protrusion part located in the lower part in the generatrix direction of a taper-shaped outer peripheral surface. It is explanatory drawing.

  Hereinafter, in order to clarify the configuration of the present invention more specifically, representative embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 shows an example of a front wing member for ground reinforcement according to the present invention in the form of a front view, and FIGS. 2 and 4 show its plan view and bottom view, respectively. Further, FIG. 3 shows an AA cross-sectional form in FIG. In these drawings, the tip blade member 10 is composed of SCW410 (cast steel product for welded structure) or a cast steel product having mechanical properties equivalent to or higher than that, and has a cylindrical main body 12 and an outer peripheral surface thereof. It is composed of a fixed spiral wing member 14, an excavation blade 16 provided integrally on the outer surface of the bottom portion, and a tapered attachment portion 18 that constitutes the upper portion of the main body portion 12.

  In the tip wing member 10 having such a configuration, the main body 12 has a bottomed cylindrical shape as shown in FIG. 3, and a wing member 14 made of the same material as that of the main body 12 is provided on the outer peripheral surface thereof. It is provided integrally in a spiral shape over approximately 360 °, and is shaped so that it can easily bite into hard ground, and is angled with respect to the axis of the main body portion 12 so as to enter the ground. The driving force is increased. Further, on the outer surface of the bottom portion of the main body 12, as shown in FIG. 4, the excavation soil is excavated, and the excavated soil can be easily moved from the center to the outside. Are integrally disposed.

  And the attachment part 18 which comprises the upper part of the main-body part 12 has the taper-shaped outer peripheral surface 20 which becomes small diameter upwards, as further shown in FIGS. A short cylindrical guide portion 22 is coaxially provided in an integrated structure at the upper end portion having the smallest diameter, and can be easily centered when attaching a reinforcing member (30) described later. 1 and 2, a plurality of protrusions 24 that extend over the entire length of the tapered outer peripheral surface 20 in the generatrix direction are integrally provided at predetermined intervals in the circumferential direction. ing. The plurality of protrusions 24 are three in this case, and are integrally formed on the tapered outer peripheral surface 18 with a phase difference of 120 ° in the circumferential direction and a width of 5 mm and a height of 1 mm. -ing The tapered outer peripheral surface 20 is formed so as to form an angle of 30 ° with respect to the axis of the main body portion 12 here.

  By the way, the tip wing member 10 for ground reinforcement according to the present invention is used by being attached to the tip of a tubular reinforcement represented by a steel pipe in the same manner as in the past. An example is shown in FIG. Then, in the form in which the attachment part 18 provided in the upper part of the main-body part 12 in the front-end | tip wing member 10 is inserted in the opening part of the front-end | tip (lower end) of the reinforcing material 30, these front-end | tip opening parts and attachment parts 18 and Is fixed by welding and fixed, but at this time, the attachment portion 18 has a tapered shape having a tapered outer peripheral surface 20, so that the tube diameter of the reinforcing member 30 changes. Even so, the lower end of the distal end opening of the reinforcing member 30 is brought into contact with or locked to any position of the intermediate portion in the generatrix direction of the tapered outer peripheral surface 20 of the mounting portion 18. The welded portion 32 is formed by welding. In addition, the reinforcing member 30 is configured by connecting a plurality of pipes in addition to a single pipe body, and here, the lower reinforcing pipe 30a and the upper reinforcing pipe 30b are connected to each other. It is comprised in the form.

  That is, as shown in FIGS. 6A to 6C, when the attachment portion 18 of the tip wing member 10 is inserted into the tip opening of the reinforcing member 30 having a different pipe diameter, the taper of the attachment portion 18 is increased. The lower end of the reinforcing member 30 comes to be located at different parts of the outer peripheral surface 20 in the generatrix direction. In other words, when the tube diameter of the reinforcing member 30 is small, the lower end is positioned at the upper portion of the mounting portion 18 as shown in FIG. In addition, as the pipe diameter of the reinforcing member 30 increases, the welded portion between the tip opening of the reinforcing member and the mounting portion 18 is as shown in (b). When the tube diameter of the reinforcing member 30 is increased (moved toward the central portion side (lower side) in the generatrix direction of the tapered outer peripheral surface 20 and the reinforcing member 30 is further increased in diameter, as shown in (c)), the end portion on the large diameter side of the mounting portion 18 is obtained. At the lower end, welding fixation is performed over the entire circumference between the reinforcing member 30 and the mounting portion 18.

  Thus, in the tip wing member 10 according to the present invention, the entire tip wing member 10 and the tip opening of the reinforcing member 30 are located at any position on the tapered outer peripheral surface of the mounting portion 18 provided on the upper portion of the main body portion 12. Even if the pipe diameter of the reinforcing material 30, in other words, the diameter of the tip opening changes, from the place where welding fixation is performed over the circumference, the taper-shaped outer circumferential surface 20 of the mounting portion 18 in the generatrix direction. Since the welding position can be changed and the welding fixation can be realized, it is possible to deal with the reinforcing member 30 having a plurality of pipe diameters with one tip blade member 10. This makes it possible to advantageously reduce the type (number) of tip blade members to be prepared.

  In addition, here, the plurality of protrusions 24 extending in the generatrix direction with respect to the tapered outer peripheral surface 20 of the attachment portion 18 constituting the upper portion of the main body portion 12 of the tip wing member 10 are spaced apart from each other at a predetermined interval in the circumferential direction. When the reinforcing material 30 is inserted into the distal end opening of the reinforcing member 30, the inner corner of the lower end of the reinforcing member 30 abuts on the protrusion 24 as shown in FIG. A predetermined distance: x is provided between the outer peripheral surface 20 and the tapered outer peripheral surface 20, and in such a state that the predetermined distance: x is separated, the distal end portion (lower end portion) of the reinforcing member 30 is provided. And the taper-shaped outer peripheral surface 20 of the mounting portion 18 are welded over the entire circumference, so that a welding width (a distance corresponding to x) between them can be sufficiently secured. Therefore, the mounting portion 18 and thus the tip wing member 0 than it welding strength was decided that can effectively increase between the reinforcing member 30. Here, the distance x in the vertical direction between the lower end of the reinforcing member 30 and the tapered outer peripheral surface 20 formed by the presence of the protrusion 24 is generally 1 to 6 mm depending on the thickness of the reinforcing member 30 and the like. A degree is employed, which advantageously results in the formation of an effective weld.

  In addition, the assembly | attachment by welding with such a reinforcing material 30 (30a) and the tip wing | blade member 10 is generally implemented by factory welding, and the assembly | attachment body is conveyed to the site | part which performs ground reinforcement, and is conventional. It will be used in the same way. Specifically, the reinforcement member 30 (30a) formed by attaching the tip wing member 10 to the tip portion is suspended, mounted on a rotation driving jig, and set on a construction machine. After erection and confirming the verticality (perpendicularity) of the reinforcing member 30 (30a), the tip blade member 10 is rotated in the forward direction with respect to the penetration direction of the spiral blade member 14 by rotating around the axis. Embedding is performed while applying a force (right rotational force) and rotationally penetrating into the ground by the propulsive force and pressure input of the wing member 14. When the length of the reinforcing member 30 (30a) is insufficient, the middle reinforcing member or the upper reinforcing member 30b is further connected in a welded or mechanical joint structure, and the rotation penetration operation is continued, and the tip portion is supported. After reaching the ground and confirming that it has reached a predetermined depth of penetration, the burial operation is completed, and the ground is reinforced.

  The exemplary embodiments of the present invention have been described in detail above. However, the embodiments are merely examples, and the present invention is limited in any way by specific descriptions according to such embodiments. It should be understood that it is not interpreted.

  For example, in order to ensure stable quality as a pile-shaped ground reinforcing material, the illustrated tip wing member 10 is an integrally molded product of cast steel. The wing member 14, the digging blade 16, and the attachment portion 18 can be produced as two or more parts separately or in combination, and these can be integrated by welding or the like to form one tip wing member 10. It is.

  Further, in the illustrated tip blade member 10, a particularly desirable structure of the present invention in which a plurality of protrusions 24 are provided on the tapered outer peripheral surface 20 of the mounting portion 18 is employed, but the present invention is not limited thereto. However, it is also possible to provide a mounting portion having a tapered outer peripheral surface formed of a simple smooth surface, in which such protrusions 24 are not provided.

  Furthermore, although the number of the protrusions 24 provided on the tapered outer peripheral surface 20 of the mounting portion 18 is three in the illustrated specific example, there is no problem even if the number of the protrusions 24 is four or more, and the reinforcement can be welded. An appropriate number is selected according to the tube diameter and tube thickness of the material 30, the taper angle of the tapered outer peripheral surface 20, and the width thereof is appropriately determined.

  In addition, any of the spiral wing member 14 and the cutting blade 16 can be used in a known shape and structure, and further in size and number.

  Although not enumerated one by one, the present invention can be implemented in a mode with various changes, modifications, improvements, etc. based on the knowledge of those skilled in the art, and such a mode can be implemented in the present embodiment. It goes without saying that all of them belong to the category of the present invention as long as they do not depart from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10 Tip blade member 12 Main body part 14 Blade member 16 Excavation blade 18 Mounting part 20 Tapered outer peripheral surface 22 Guide part 24 Projection 30 Reinforcement material 32 Welding part

Claims (9)

A tip wing member that is attached to the tip of a tubular reinforcing material that is embedded in the ground while being rotated around an axis,
A structure in which a spiral wing member is fixed to the outer peripheral surface of the cylindrical main body portion, and the upper portion of the main body portion is a mounting portion having a tapered outer peripheral surface whose diameter decreases upward. In the form in which the mounting portion is inserted into the tip opening of the reinforcing member, the tip opening can be fixed to the mounting portion by welding and fixed. A tip wing member for ground reinforcement, characterized in that   A plurality of protrusions extending in the generatrix direction are integrally provided at predetermined intervals in the circumferential direction on the tapered outer peripheral surface of the mounting portion formed on the upper portion of the main body, and the plurality of protrusions are provided on the plurality of protrusions. On the other hand, the tip wing member for ground reinforcement according to claim 1, wherein the tip wing member can be fixed by welding in a state where the tip opening of the reinforcement is in contact.   The ground reinforcing material according to claim 2, wherein the plurality of protrusions are integrally disposed with a phase difference of 180 ° or less in the circumferential direction with respect to the tapered outer peripheral surface. Tip wing member.   The tip wing member for ground reinforcement according to claim 2 or 3, wherein the protrusions are provided with dimensions of width: about 5 mm and height: about 1 mm.   The tapered outer peripheral surface of the mounting portion is formed so as to form an angle of about 30 ° to about 60 ° with respect to the axis of the main body portion. The tip wing member for ground reinforcement according to Item 1.   6. The cylindrical guide portion is provided coaxially and integrally at an upper end portion having a minimum diameter of the attachment portion, according to claim 1. Tip wing member for ground reinforcement.   The ground reinforcing material according to any one of claims 1 to 6, wherein the main body portion has a closed bottom portion, and an excavation blade is fixed to an outer surface of the bottom portion. Tip wing member.   8. The reinforcing member according to any one of claims 1 to 7, wherein the reinforcing member is brought into contact with an intermediate portion in the generatrix direction of the tapered outer peripheral surface of the mounting portion and can be fixed by welding. The tip wing member for ground reinforcement according to Item 1. The reinforcing members having different pipe diameters are brought into contact with different positions in the generatrix direction of the tapered outer peripheral surface of the mounting portion, and can be fixed by welding. The tip wing member for ground reinforcing material according to any one of 8.

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