JP2006322154A - Foundation construction method of building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation construction method of a building capable of integrating a foundation and a sill into the upper surface of base concrete without taking into consideration horizontal accuracy, by simultaneously performing the construction of the foundation and a fixation of the sill to its foundation. <P>SOLUTION: The foundation 18 is constructed so that the sill 1 is arranged in a state of floating from the ground surface by supporting the sill 1 on the ground surface of a foundation constructing via a plurality of support members 3; a reinforcement 14 for the foundation is arranged in a space between the sill 1 and the ground surface; an anchor bolt 15 is installed in the lower part of the sill 1; forms 17 for the foundation are arranged on the ground surface on both lower sides of the sill 1 in this state; and concrete is placed up to a level reaching the under surface of the sill 1 between both the forms 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a building foundation construction method capable of building a concrete foundation of a building in an integrated state with a building base disposed thereon.

  Conventionally, a general method of building a concrete foundation in a building is to place a foundation formwork facing on both sides on a solidified ground, arrange a foundation rebar inside the foundation formwork, and anchor to it. Bolts are built, then concrete is placed between the foundation molds, and the concrete frames are disassembled after the concrete is solidified, so that the reinforcing bars for foundations are embedded inside, and the anchor bolts protrude from the upper surface for a predetermined length. To build concrete foundations.

The foundation is placed on the concrete foundation constructed in this way, and a nut is screwed onto the upper end of the anchor bolt that penetrates the foundation. By tightening this nut, the foundation is fixed to the concrete foundation. Yes (see Patent Document 1).
Japanese Patent Laid-Open No. 10-195585

  By the way, in the conventional foundation construction method as described above, the construction of the foundation and the fixing of the foundation thereon are separate processes, and the foundation cannot be attached until the solidification of the foundation concrete. .

  In addition, for the horizontal placement of the foundation, the horizontal accuracy of the upper surface of the foundation concrete is required, but skillful techniques and labor are required to finish the upper surface of the concrete placed between the molds horizontally and accurately. As a result, it is difficult to secure skilled workers who can perform such operations.

  Therefore, the object of the present invention is to perform the construction of the foundation and the fixing of the foundation on it at the same time, not only shortening the construction period for constructing the building but also without considering the horizontal accuracy on the upper surface of the foundation concrete The object is to provide a foundation construction method for a building that can integrate the foundation and foundation.

  In order to solve the problems as described above, the present invention floats the foundation from the ground by supporting the foundation on the ground of the foundation construction part via a plurality of support members capable of adjusting the vertical length. The foundation rebar is placed in the space between the foundation and the ground along the length of the foundation, and anchor bolts are attached to the bottom of the foundation. In this case, a configuration is adopted in which a formwork is placed on the base plate and concrete is placed between the two formwork pieces up to a level that reaches the bottom surface of the base to construct a foundation integrated with the base.

  Here, the base is made of a steel H-shaped material, assembled in a frame shape corresponding to the planar shape of the building, and supported by a plurality of support members capable of adjusting the vertical length at a plurality of positions on the lower surface. Align horizontally and accurately.

  The support member is formed by fixing a nut inside the lower end of a cylindrical shaft provided with a coupling seating plate with a base at the upper end, and providing a grounding fitting also serving as a rotation operation unit at the lower end of the screw shaft screwed into the nut. The support member is formed by fitting the lower end of the grounding metal fitting into the hole of the base plate arranged on the ground of the foundation construction part, rotating the screw shaft together with the grounding metal fitting, and adjusting the vertical length of the cylindrical shaft and the screw shaft. Level the top surface of the foundation supported in step 1.

  The concrete to be placed between the oppositely placed molds should be placed so that the upper surface reaches the lower surface of the foundation, and the lower surface of the foundation becomes a ruler, so there is no need to pay attention to the horizontal accuracy of the concrete upper surface. In addition, by attaching anchor bolts to the lower part of the foundation in advance, the foundation can be fixed to the foundation when the concrete solidifies.

  According to the present invention, the base is arranged in a state where it is floated from the ground by supporting it through a plurality of support members whose vertical lengths can be adjusted, and the foundation reinforcing bars are placed in the space between the base and the ground. In addition to arranging the bars along the vertical direction, attach anchor bolts to the lower part of the foundation, and in this state, place the formwork on the ground on both sides of the lower part of the foundation. Since the concrete foundation was constructed and the foundation was fixed on it, the foundation was fixed to the foundation when the concrete solidified by attaching anchor bolts to the bottom of the foundation in advance. And the construction period for building the building can be shortened.

  In addition, by placing the foundation horizontally and accurately, the bottom surface of the foundation becomes a ruler for placing concrete, so there is no need to pay attention to the horizontal accuracy of the top surface of the concrete. It is possible to construct a foundation having a foundation with high horizontal accuracy.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  As shown in the drawing, the base 1 uses a steel H-shaped material 1a, is assembled into a frame shape corresponding to the planar shape of the building and its size, and has a right-angled positional relationship with the required corner portion 1a. Are reinforced by joining them using the angle member 2 or the like.

  As shown in FIG. 4, the support member 3 disposed on the ground of the foundation construction part and supporting a plurality of locations of the base 1 includes a base 1 having a plurality of bolt holes 5 at the upper end of a vertically long cylindrical shaft 4. The base plate 6 is fixed, a nut 7 is fixed inside the lower end of the cylindrical shaft 4, and a grounding metal 9 that also serves as a rotating operation portion is provided at the lower end of the screw shaft 8 that is screwed to the nut 7. The base 1 is horizontally supported by fitting the lower end conical portion 9a of the ground metal fitting 9 into the central hole 11 of the circular base plate 10 disposed on the ground of the foundation construction portion.

  The support member 3 has a joint hole 6 at the upper end fixed to the lower surface of the base 1 using bolts and nuts 12, and a ground hole 9 at the lower end disposed on the ground of the foundation construction portion. In the support state of the base 1 fitted and raised, the screw shaft 8 is rotated through the grounding metal fitting 9 to adjust the vertical length of the tube shaft 4 and the screw shaft 8, thereby supporting the support member 3. The level of the upper surface of the base 1 can be leveled.

  Next, the foundation construction method using the foundation construction method of this invention is demonstrated.

  First, the ground of the foundation building part is finished by placing the concrete 13 on the ground ballast, and then placing the base 1 on the top of the waste concrete 13, as shown in FIG. The base 1 is floated above the discarded concrete 13 by fitting the lower end grounding metal fitting 9 of the supporting member 3 fixed at a plurality of lower portions in the center hole 11 of the circular base plate 10 disposed on the discarded concrete 13. Arrange in a state.

  After assembling the base 1 into a frame shape, the vertical length of each support member 3 is adjusted by rotating the screw shaft 8 to level the level of the upper surface of the base 1.

  Next, the reinforcing bars 14 for the foundation are arranged in the space between the base 1 and the abandoned concrete 13 along the length direction of the base 1 and the anchor bolts 15 are suspended at necessary portions below the base 1. Install.

  As shown in FIG. 3, although the basic reinforcing bar 14 is not shown, the lower portion is supported by a concrete block-like support member or the like disposed on the discarded concrete 13, and the anchor bolt 15 is a flange portion of the base 1. Is attached by screwing the nut 16 screwed into the anchor bolt 15, and the base rebar 14 is arranged in this manner and the anchor bolt 15 is attached, and is discarded on both sides of the lower portion of the base 1. A foundation mold 17 is arranged on the concrete 13 so as to face each other, and then the concrete is placed between the two molds 17 to a level reaching the lower surface of the base 1.

  If the foundation formwork 17 is disassembled after the concrete is solidified, the foundation rebar 14 is embedded inside, and the rising foundation 18 integrated with the base 1 with the anchor bolt 15 is completed.

  As described above, the concrete to be placed between the oppositely disposed molds 17 may be placed so that the upper surface thereof reaches the lower surface of the base 1, and the lower surface of the base 1 becomes a ruler. It is not necessary to pay attention to the leveling of the upper surface and the horizontal accuracy in the case, and by fixing the anchor bolt 15 to the lower part of the base 1 in advance, the foundation 1 can be fixed to the foundation 18 when the concrete solidifies. Therefore, the foundation construction work period for building the building can be shortened.

(A) is a plan view of the base, (b) is a longitudinal sectional view of the foundation construction state Longitudinal front view with foundations placed on abandoned concrete with support members and foundation molds on both sides Longitudinal front view showing the relationship between foundation reinforcing bars, anchor bolts and foundation formwork for the foundation placed on abandoned concrete (A) is a perspective view of a support member, (b) is a longitudinal sectional view showing a screwed portion of a nut and a screw shaft of the support member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 1a H-shaped material 2 Angle material 3 Support member 4 Cylinder shaft 5 Bolt hole 6 Joint seat 7 Nut 8 Screw shaft 9 Grounding metal fitting 10 Round base board 11 Center hole 12 Bolt and nut 13 Discard concrete 14 Foundation reinforcement 15 Anchor bolt 16 Nut 17 Foundation form 18 Foundation

Claims (1)

  By supporting the base on the ground of the foundation construction part via a plurality of support members capable of adjusting the vertical length, the base is placed in a state of floating from the ground, and the space between the base and the ground is placed. Arrange the reinforcing bars for the foundation along the length of the foundation, attach anchor bolts to the bottom of the foundation, place the formwork on the ground on both sides of the bottom of the foundation, and put the concrete between the two forms. A foundation construction method for buildings that is built up to a level that reaches the bottom surface of the foundation and builds a foundation that is integrated with the foundation.

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