JP4545499B2 - Pile foundation support structure - Google Patents

Description

  The present invention relates to a pile foundation support structure.

  For example, when multiple steel piles are driven into the ground and concrete cloth foundations are supported by these steel piles from below, the pile head height position of each steel pile is a height suitable for supporting the concrete foundation. It is not always easy to set the position.

  The goal of steel piles is to hit the center position of the foundation, but it is quite difficult to drive all steel piles to the center position of the foundation, and the piles must be driven to an eccentric position exceeding the allowable range. In such a case, a bracket that protrudes toward the center of the foundation is welded to the upper end of the steel pile that has been driven in, and a part or all of the foundation load is applied to the bracket. It is not always easy to attach the bracket to the height position suitable for the foundation support of the upper end portion of the steel pile driven into the ground by welding.

  In view of the above problems, the present invention can easily set the pile head height position of a pile driven into the ground to a height position suitable for foundation support, and the pile is temporarily A pile that can be easily provided with a lateral protrusion for foundation support at a height suitable for foundation support, even if it has been driven to an eccentric position beyond the allowable range from the center. The objective is to provide a foundation support structure.

The above-described problem is that a plurality of piles are driven into the ground, and a pile head member for foundation support is screwed to a screw portion provided at an upper end portion of each pile so that the position can be adjusted in the vertical direction. The foundation is supported by
The pile head member is
One or two or more types of non-eccentric pile head members used for piles driven in an eccentric position relative to the center of the center or an allowable eccentric range, and
One or more types of eccentric pile heads with side protrusions that are used for piles that are driven in an eccentric position exceeding the allowable range with respect to the center of the foundation and that project toward the center of the foundation and support the foundation It solves by the foundation support structure (the 1st invention) of the pile which consists of one or two or more pile head members among members.

  In this structure, each pile head member that supports the foundation is provided on the threaded portion at the top of the pile so that the position of the pile head can be adjusted in the vertical direction. The position can be set easily.

  And in said 1st invention, when at least one of the pile head members consists of said pile head member for eccentricity (2nd invention), this pile head member for eccentricity is for foundation support. Therefore, by adjusting the position of the eccentric pile head member in the vertical direction using the above screw mechanism, the side protrusion can be positioned at a height suitable for the foundation support. Can be easily prepared.

  In addition, the above-mentioned problem is that the pile head member having a lateral protrusion that is driven into the ground at an eccentric position that exceeds an allowable range with respect to the center of the foundation and protrudes toward the center of the foundation to support the foundation, A pile foundation support structure (third invention), wherein the pile is screwed to a screw portion provided at the upper end of the pile so that the position can be adjusted in the vertical direction, and the foundation is supported by the pile head member. Solved.

  In this structure, the pile head member with the lateral protrusion is provided on the threaded portion at the upper end of the pile so that the position of the pile head can be adjusted in the vertical direction. It can be easily provided at a height suitable for the support.

  Also, it is a pile head member for eccentricity used for piles driven in an eccentric position exceeding the allowable range with respect to the center of the foundation, and can be adjusted in the vertical direction with respect to the screw part provided at the upper end of the pile The side protruding portion is also provided by a pile head member for eccentricity (fourth invention) characterized by comprising a threaded portion that is screwed to the side and a side protruding portion that protrudes toward the center of the foundation and supports the foundation. Can be easily provided at a height suitable for the base support.

  Since the present invention is as described above, the pile head height position of the pile driven into the ground can be easily set to a height position suitable for the support of the foundation. Even if it is driven into an eccentric position beyond the allowable range from the center, the side protrusion for the foundation support can be easily provided at a height position suitable for the foundation support. In addition, according to the structure of the present invention, it is possible to easily proceed with the repair work when the foundation is sunk by using the screw mechanism.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  In the first embodiment shown in FIGS. 1 to 4, the foundation 1 is made of a concrete cloth foundation, and the pile 2 is made of a steel pipe pile. As shown in FIG. 1, the piles 2 are driven into the ground by a rotary press-fitting method or the like. FIG. 1 shows a case where several piles have been driven eccentrically from the center position of the foundation with the goal of driving all the piles 2... Into the center position of the foundation 1.

  And the female screw joint 3 for providing the screw part 3a is attached to the upper end part of each pile 2 driven into the ground by welding etc. as shown in FIG. Pile head members selected from the three types of pile head members 4, 5, and 6 shown in FIGS. 2 (a), (b-1), and (b-2) can be adjusted in the vertical direction in each of the screw portions 3a. The foundation 1 is supported on the pile head members 4, 5, and 6. In addition, the screw part of the upper end of each pile 2 may be provided in the pile before pile driving, and may be provided by attaching the joint 3 by welding after pile driving.

  The above three types of pile head members 4, 5 and 6 are all made of a cast steel integrated product. Of these, the pile head member 4 shown in FIG. It is a non-eccentric pile head member used for a pile driven into a position or an eccentric position within an allowable range, and is provided with a male screw portion 7 that is screwed with a screw portion 3a provided at the upper end of the pile 2. The base 1 is supported on the support portion 8 by an I-shaped member provided with a non-eccentric support portion 8 on the upper end side of the screw portion 7.

  Moreover, the two types of pile head members 5 and 6 shown in FIGS. 2 (B-1) and (B-2) are eccentric for use in piles driven into an eccentric position exceeding an allowable range with respect to the center of the foundation 1. The corresponding pile head member is provided with side protrusions 9 on the upper end side of the male screw portion 7 so as to protrude toward the center of the foundation and support the foundation.

  The eccentric head member 5 for eccentricity shown in FIG. 2 (B-1) is an L-shaped pile head member provided with one side protrusion 9, and as shown in FIG. 1 and FIG. 3 (B), In the general part of the foundation in which the foundation 1 extends linearly, it is used for a pile that has been driven eccentrically from the center of the foundation, and the straight general part of the foundation 1 is supported by the side protrusions 9.

  Moreover, the pile head member 6 for eccentricity shown in FIG. 2 (B-2) is a T-shaped pile head member in which the two lateral protrusions 9 and 9 are provided with their directions different from each other by 180 °. As shown in FIG. 1, it is used for a pile that has been driven eccentrically from the center of the foundation 1 in the non-general part of the foundation 1, such as a corner part, a three-way branch part, a four-way branch part, etc. Thus, two mutually orthogonal sides of the foundation 1 are supported by these lateral protrusions 9 and 9.

  In this embodiment, the upper surface of each pile head member 4, 5, 6 is provided with a plurality of protrusions 10, which are embedded in the concrete of the foundation 1, and the foundation 1 is subjected to a horizontal force. It is designed to be able to resist strongly.

  In the above-mentioned foundation support structure, each pile head member 4, 5, 6 is provided on the upper end screw portion 3 a of each pile 2. Can be easily set to a height position suitable for the foundation support by a screw mechanism, that is, by a rotation operation on them.

  Moreover, since the side protrusions 9 for supporting the foundation to the pile driven eccentrically are provided on the pile head members 5 and 6, the side protrusions 9 are supported by the above-mentioned screw mechanism. It can be easily provided at a height position suitable for. 4 (a) and 4 (b), for the piles 2 and 2 having different heights at the upper end height positions, the lateral protrusions 9 and 9 of the eccentric head pile members 5 and 5 are respectively connected to the foundation 1 and The state where it was prepared in the same height position suitable for 1 support is shown.

  In addition, in the case of the L-shaped pile head member 5 shown in FIG. 2 (B-1), the height position can be adjusted with accuracy in units of one pitch of the screw, and the T-type shown in FIG. 2 (B-2). The pile head member 6 can be height-adjusted with an accuracy of 0.5 pitch unit of screw, and the I-shaped pile head member 4 shown in FIG. .

  In addition, as described above, by providing the pile head member with the side protrusions, the pile head member including the side protrusions can be configured with a cast steel integrated product as described above. The pile head member including the side protrusion can be easily manufactured.

  The second embodiment shown in FIGS. 5 and 6 is for the case where the foundation 1 is composed of a group of independent concrete foundations, and several piles with the goal of driving the piles 2... Into the center of each foundation 1. 2 has been driven eccentrically from the center position of the foundation 1, and the upper end threaded portion of each pile 2 that has been driven into the non-eccentric position or the allowable eccentric position is shown in FIG. The pile head members 4 for eccentricity are screwed together to support the foundation 1 as shown in FIG. Further, the upper end threaded portion of each pile 2 driven into an eccentric position exceeding the permissible range is screwed with an eccentric corresponding pile head member 11 made of a cast steel integrated product as shown in FIG. The pile head member 11 for eccentricity is provided with two side protrusions 9 and 9 in the V shape on the upper end side of the male screw portion 7, and the independent foundation 1 is shown in FIG. As shown in (c), these two lateral projections 9 and 9 are supported from below. Others are the same as in the first embodiment.

  Also in this structure, since each pile head member 4 and 11 is provided in the upper end screw part of each pile 2 ... so that position adjustment is possible to an up-down direction, each pile head member 4 and 11 is foundation support by a screw mechanism. It can be easily set to a height position suitable for. In addition, since the side protrusions 9 and 9 for supporting the foundation on the eccentrically driven pile are provided on the pile head member 11, the side protrusions 9 and 9 are supported on the foundation by the screw mechanism described above. It can be easily provided at a height position suitable for. In addition, in the eccentric corresponding pile head member 11 of the present embodiment, the height position can be adjusted with accuracy in units of one screw pitch.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, the present invention includes a case where all piles are driven into the center position of the foundation or an eccentric position within an allowable range, and a non-eccentric pile head member is screwed into all the piles. Moreover, each pile head member can be easily set to a height position suitable for the foundation support by a screw mechanism. In addition, the present invention includes a case where all piles are driven into an eccentric position exceeding an allowable range, and an eccentric pile head member is screwed into all the piles. It also includes a structure in which a non-eccentric pile head member or an eccentric pile head member is screwed onto the pile to support the foundation. In addition, the pile may be made of various steel piles, may be made of piles other than steel piles, etc., and the foundation is either a continuous foundation or an independent foundation as described above. There is no question, and a foundation other than a concrete foundation such as a steel foundation may be used. In addition, the third and fourth inventions can also be used for repair work for uneven settlement of the foundation, and the repair work can be easily advanced.

It shows the structure of the first embodiment and is a plan view of the foundation. (A) is a perspective view of a pile head member used in the first and second structures, (b-1) and (b-2) are perspective views of a pile head member used in the structure of the first embodiment, Fig. (B-3) is a perspective view of a pile head member used in the structure of the second embodiment, and Fig. (C) is a sectional side view showing an upper end portion of the pile. Drawing (a)-figure (c) are each an enlarged plan view showing the foundation support state by a pile head member. Drawing (a) and figure (b) are sectional side views showing a pile support state by a pile head member, respectively. The structure of 2nd Embodiment is shown and it is a top view of a foundation. Drawing (a)-figure (c) are each an enlarged plan view showing the foundation support state by a pile head member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Foundation 2 ... Pile 3a ... Screw part 4 ... Pile head member for eccentricity 5, 6 ... Pile head member for eccentricity 7 ... Screw part 9 ... Side protrusion 11 ... Pile head member for eccentricity

Claims (3)

Plural piles are driven into the ground, and the pile head member for foundation support is screwed to the threaded portion provided at the upper end of each pile so that the position can be adjusted in the vertical direction, and the foundation is supported by the pile head member And
The pile head member is
One or two or more types of non-eccentric pile head members used for piles driven in an eccentric position relative to the center of the center or an allowable eccentric range, and
One or more types of eccentric pile heads with side protrusions that are used for piles that are driven in an eccentric position exceeding the allowable range with respect to the center of the foundation and that project toward the center of the foundation and support the foundation It consists of one or more pile head members among the members , and
The pile head member is formed of a cast steel integrated molded product having a plurality of protrusions on the upper surface thereof, and the protrusions are embedded in the foundation concrete so that the foundation resists horizontal force. Pile foundation support structure characterized by   The pile foundation support structure according to claim 1, wherein at least one of the pile head members is a pile head member for eccentricity. A pile head member is provided at the upper end of the pile, the pile head member being driven into the ground at an eccentric position exceeding the allowable range with respect to the foundation center, and having a lateral protrusion that protrudes toward the foundation center and supports the foundation. The threaded portion is screwed so that the position can be adjusted in the vertical direction, and the foundation is supported by the pile head member , and
The pile head member is formed of a cast steel integrated molded product having a plurality of protrusions on the upper surface thereof, and the protrusions are embedded in the foundation concrete so that the foundation resists horizontal force. basic support structure of the pile, characterized in that there.

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