JP4732915B2 - Foundation construction method and device, and anchor bolt support device for construction - Google Patents

Description

  The present invention is applied to a concrete foundation when constructing a low-rise building for a house such as a wooden or RC wall structure, and in a mode in which an upper end screw portion is projected from a foundation concrete placed in a formwork. A method of constructing a foundation that performs horizontal and vertical positioning at a predetermined position and at a predetermined interval adapted to the mounting position of the column with respect to the anchor bolt to be embedded, and connects the column directly to the upper end screw part or via a base. The present invention relates to an apparatus and an anchor bolt support apparatus for construction.

  This type of concrete foundation includes a cloth foundation, an independent foundation or a solid foundation. For example, in the case of a cloth foundation, a concrete foundation that is continuous in a strip shape along the length of the wall with an inverted T-shaped cross section is constructed. In order to fix buildings such as wooden structures and RC wall structures, anchor bolts are buried in the foundation, and a pillar is erected directly or via a base on the upper end thread of the anchor bolt protruding on the foundation. When picking and constructing, foundation concrete is placed in the mold with the upper end thread supported by an anchor support provided on the mold.

  Therefore, it is necessary to install the anchor bolts embedded in the foundation concrete with a predetermined position and interval that are set in conformity with the mounting positions and intervals of the foundation and pillars. If accuracy decreases due to deficiencies or immaturity of workers, the repair work takes a lot of labor and cost, and the damage is enormous, such as causing a delay in the construction period. Various proposals have been made.

JP 2005-315021 A JP 2000-104263 A Japanese Patent No. 3632948 JP 2000-248747 A JP 09-88083 A

  In these prior arts, for example, in the case of Patent Document 1, an anchor bolt is inserted into each insertion hole provided in the upper and lower horizontal plates, and is detachably locked and held by press-contact of a push screw. A support device for a foundation anchor bolt for positioning in the width direction and in the longitudinal direction by arranging a plurality of positioning portions opened in a slit shape on both ends to be placed on the base plate, and aligning the positioning portions with the black line on the top end Is disclosed.

  The support device for a foundation anchor bolt according to Patent Document 1 has no inclination by loosening a push screw to adjust the height of the anchor bolt and inserting the anchor bolt into the spaced upper and lower insertion holes. The anchor bolt is supported in the vertical state, and the anchor bolt is positioned by moving the support device in the width direction and the longitudinal direction on the top end of the formwork and aligning the positioning part with the black line. It is.

  In the case of Patent Document 2, an anchor bolt is inserted into an insertion portion provided in the center of the holding plate, and is supported by being sandwiched by a pair of upper and lower nuts to be screwed together, or welded to the upper center surface of the holding plate. The anchor bolt is inserted into the insertion tube portion that is fixed and fixed in place, and is locked with a screwed nut provided on the upper end side of the insertion tube portion, and is held on the top end of the formwork. An anchor bolt holding jig provided with positioning portions that can be engaged from the left and right at the top end of the formwork is disclosed at both ends of the plate.

  In the anchor bolt holding jig according to Patent Document 2, the height of the anchor bolt is adjusted by loosening the upper and lower nuts with respect to the insertion portion or the upper nut with respect to the insertion tube portion. In the latter case, the anchor bolt is supported in a vertical state without inclination by inserting a long insertion tube portion, and the width direction of the holding jig is determined by the positioning portion engaged with the top end of the mold. And anchor bolts are positioned by moving the holding jig in the longitudinal direction.

  Further, in the case of Patent Document 3, a long plate-shaped positioning tool main body that is installed with both end sides laid on the top end of the mold frame is bridged between the concrete placing opening and the mold frame. In addition to providing a frame-shaped medium frame material, an opening in which an anchor bolt mounting hole is formed in a cutout shape at the opening edge of the opening protrudes from the medium frame material, and an opening in which no mounting piece is provided An anchor bolt positioning tool provided with a notch-shaped auxiliary mounting hole in the mouth edge portion of this is disclosed.

  The anchor bolt positioning tool according to Patent Document 3 is designed to increase positioning accuracy by locking the anchor bolt directly in the mounting hole, and adjacent each positioning tool main body at the corner or the corner of the mold. When one of the mounting holes is aligned with the other auxiliary mounting hole, the anchor bolt can be attached to the mounting hole, and the mounting hole and the auxiliary mounting hole are formed in a notch shape and opened. The long anchor bolt can be moved horizontally and inserted into each mounting hole by communicating with the portion.

  In the case of Patent Document 4, the longitudinal dimension is an integral multiple of the module of the building unit (basic dimension corresponding to the column interval), and the short dimension is a width that can be placed between the top ends of the formwork. It is an installation tool that is formed in the shape of a long plate, and is provided with a horizontal beam that bridges the formwork by forming a concrete loading window and an anchor bolt insertion hole in the long plate. An anchor bolt installation jig using three types of end jigs, intermediate jigs for beam intermediate parts, and joint jigs for connection parts is disclosed.

  The anchor bolt installation jig according to Patent Document 4 has a longitudinal dimension set to an integral multiple of the module of the building unit, so that it can cope with the foundations of various lengths by simply connecting a plurality of jigs. By allocating and using three types of standardized jigs at various locations on the foundation, foundation work including installation of anchor bolts can be easily performed.

  In the case of Patent Document 5, a substantially boat-shaped grout filling mold body is provided on the upper end thread portion side of the anchor bolt, and a level adjuster using bolts and nuts is suspended from the bottom surface of the mold body. When the foundation concrete is installed, a recess is formed at the top and the height adjustment bolt of the level adjustment tool protrudes from the bottom of the recess. A grout filling method at the lower end of the column base and a forming mold for forming a grout filling recess are disclosed in which level mortar is placed in the recess in a state of being directed to the groove.

  The grout filling method and forming mold according to Patent Document 5 are installed at the lower end of the column base, compared to the conventional method in which grout is filled with a grout filling form on the top edge of the foundation concrete. By filling the recess with grout so that the surface is almost at the same level as the top edge of the foundation concrete, interference between the anchor bolt and the floorboard and the interference between the grout and the outer wall panel, which was a problem of the conventional construction method, is prevented. It is what you do.

  However, there are still problems that need to be improved in the prior art including these prior arts. For example, in the case of Patent Document 1, the shape of the support device is not flat, and die cutting and bending are performed. It is difficult to reduce the manufacturing unit cost as necessary, and when installing the anchor bolt to match the mounting position of the pillar, the installation position of each support device is set while measuring using a scale etc. There are problems such as difficulty in improving positioning accuracy and work efficiency.

  Moreover, in the case of patent document 2, in the form which clamps an anchor bolt with a pair of each nut, a fall prevention function is inadequate, and long insertion is carried out in the form which inserts an anchor bolt through a long insertion cylinder part. It is not easy to work vertically to weld the cylinder part vertically, the positioning part that regulates the width direction cannot be applied to various wooden or steel molds, and anchor bolts are fitted to fit the mounting position of the column. When positioning, as in the case of Patent Document 1, since the installation position of each support device is set while measuring using a scale or the like, it is difficult to improve positioning accuracy and work efficiency, etc. There was a problem.

  In addition, in the case of Patent Document 3 and Patent Document 4, it is difficult to reduce the manufacturing unit price because a large and expensive manufacturing facility is required in order to form a large number of punching holes while being flat. Because it is long and heavy, it requires a large vehicle to be transported to the site, and it requires a lot of human power to erection the formwork at the site. It is not impossible to assemble the anchor bolts, but considering the transportation to the site and the construction work at the site, it is practically impossible to assemble in advance. There was a problem in construction.

  Further, in the case of Patent Document 5, the mold body for filling grout supports both sides of the mold body for foundation concrete placement so that the height can be adjusted, and the center of the mold body for grout filling is supported with respect to the center bottom surface. Since the level adjuster is suspended, it is necessary to adjust the height of the mold body in a complicated manner, and the level adjuster cannot be positioned accurately unless this height adjustment is appropriate. The level adjustment using the height adjustment bolt needs to be set in relation to the relative position of the anchor bolt with the upper end thread. However, since it is set individually, positioning accuracy is difficult to obtain, and the anchor bolt is inserted through the mold body. Therefore, there were problems such as that assembly was not easy.

  Therefore, the present invention provides a foundation construction method and apparatus and a construction anchor bolt support device that can solve the problems of the prior art, and in particular, each anchor bolt is made strong at each installation position of adjacent columns. It can be supported vertically by the supporting force, the interval between the installation positions of adjacent pillars can be easily and accurately positioned with an inexpensive positioning plate (spacing setting plate) with a simple structure, and the relative position to the upper end threaded portion of the anchor bolt The main purpose is to be able to easily and accurately set the level adjustment of the grout layer formed between the steel column and the level adjuster provided.

The foundation construction method according to the present invention is an aspect in which an anchor bolt support device is provided in which an upper end screw portion is screwed to a template and anchor bolts are suspended, and both ends of the template are installed between the top ends of the mold. Place anchor bolt support devices at each column installation position, and after positioning the upper end threaded portion of each anchor bolt support device, fix both ends of the template to the top end of the mold and place the foundation concrete A basic construction method,
In the anchor bolt support device, an auxiliary plate connected to the upper end threaded portion of the anchor bolt is provided in parallel and spaced apart from the lower side of the template, and a level adjuster equipped with a height adjustment bolt is provided on the auxiliary plate to assist After placing the concrete in the formwork so that the head of the height adjustment bolt protrudes by embedding the plate, remove the template and reach the top surface of the height adjustment bolt head set on the ground contact surface of the column It is characterized in that a grout layer is formed by filling grout material on basic concrete . (Claim 1)

In the foundation construction method according to claim 1, a long interval setting plate provided with a mounting hole for connecting with an anchor bolt is prepared for each predetermined interval for constructing a pillar, and between adjacent anchor bolt support devices. Positioning by detachably connecting . (Claim 2)

The foundation construction method according to claim 1 or 2 , wherein a partition plate is provided between the molds with the anchor bolt support device interposed therebetween, and the foundation concrete is placed in the mold from the outside of the partition plates. A recess for filling the grout material is formed between the partition plates, and a grout layer is locally formed by filling the grout material between the partition plates. (Claim 3 )

The foundation construction apparatus according to the present invention provides an anchor bolt support device in which an upper end screw portion is fixed to a template and anchor bolts are suspended, and both ends of the template are installed between the top end portions of the formwork. Place anchor bolt support devices at each column installation position, and after positioning the upper end threaded portion of each anchor bolt support device, fix both ends of the template to the top end of the mold and place the foundation concrete A basic construction device that performs
The anchor bolt support device includes a flat template laid between the molds, an auxiliary plate spaced in parallel to the lower side of the template, an upper end screw portion passing through the template and the auxiliary plate, and an upper end screw. And an anchor bolt that is fixed by holding the template and the auxiliary plate from above and below with a holding nut screwed to the portion, and the auxiliary plate has a height adjusting bolt that sets the upper surface of the grout layer on which the column is installed It is characterized by providing a level adjuster comprising (Claim 4 )

5. The foundation construction device according to claim 4 , wherein the level adjuster includes a height adjustment nut fixed to the auxiliary plate, and a screw shaft that is screwed to the height adjustment nut to adjust a height of a head top surface. It has a possible height adjustment bolt, and a locking holding plate for preventing the height adjustment bolt from loosening by drilling a screw hole to be screwed into the screw shaft of the height adjustment bolt . (Claim 5 )

6. The foundation construction device according to claim 4 or 5 , wherein a long interval setting is provided between each adjacent anchor bolt support device with a mounting hole connected to the anchor bolt at every predetermined interval for constructing a pillar. The plate is erected and is detachably connected to the upper end thread portion of the anchor bolt through the attachment hole . (Claim 6 )

The anchor bolt support device for constructing a foundation according to the present invention is such that the upper end screw portion is fixed to the template and the anchor bolt is vertically suspended, and both ends of the template are installed between the top end portions of the formwork. An anchor bolt support device placed at each installation position, a flat template laid between molds, an auxiliary plate spaced in parallel to the lower side of the template, and an upper end screw portion as a template A grout layer in which the auxiliary plate is inserted and anchor bolts are fixed by holding the template and the auxiliary plate from above and below with a holding nut screwed into the upper end threaded portion, and a column is installed on the auxiliary plate. A level adjuster provided with a height adjusting bolt for setting the upper surface of is provided . (Claim 7 )

In the construction anchor bolt support device of the foundation according to claim 7, wherein the level adjustment device includes a height adjustment nut fixed to the auxiliary plate, screw shaft height adjustment nut screwed to the height of the head top surface Has a height adjustment bolt that can be adjusted, and a locking holding plate that is provided with a screw hole that is screwed into a screw shaft of the height adjustment bolt to prevent the height adjustment bolt from loosening. (Claim 8 )

In the foundation construction method according to claim 1 , each anchor bolt is suspended in a self-supporting vertical state by an anchor bolt support device that screw-fixes each anchor bolt to the template and the auxiliary plate arranged in parallel vertically. Therefore, it is possible to prevent the body from falling over and to set the upper end threaded portion of each anchor bolt at the correct column installation position. In addition, the anchor bolt support device is preliminarily assembled at a factory or work site near the site. By making it unitized, it can be placed and constructed as it is on the top end of the formwork, so it is possible to improve work efficiency at the site and shorten the construction period.

In the foundation construction method according to claim 2, the anchor bolt support devices 3 adjacent to each other using the interval setting plate are connected to each other so that the template bolt and the upper end thread portion of the anchor bolt are connected to each other. Since the relative position can be easily regulated and positioned, the horizontal and vertical positioning adjustment operations for each anchor bolt support device can be performed quickly and accurately.

In addition, unlike conventional positioning tools such as Patent Documents 3 and 4 installed between the molds, the interval setting plate can be installed without being restricted by the width intervals of the molds. This standardization makes it easy to procure interval setting plates and inventory management.

Furthermore, since the interval setting plate has a simple structure and it is very easy to attach the anchor bolt support device to each anchor bolt, it can be constructed inexpensively and efficiently, and multiple types are prepared in advance. Thus, it is possible to adapt to various building structures, and after positioning the anchor bolt support device, it can be removed and reused repeatedly.

In the foundation construction method according to claim 3, since the steel column is erected by forming a grout layer in the filling recess provided in the rising part of the foundation, the height at which the steel column is installed is substantially the same as that of the rising part. At the same level, the building can be designed easily, and the use of grout materials such as non-shrink mortar is localized, so that filling and leveling operations are easy, and the levelness and verticality And the amount of grout used can be reduced.

The foundation construction device according to claim 4 is a foundation construction device that specifies the auxiliary plate and the level adjuster used in the foundation construction method according to claim 1 , and the level adjustment is performed using various known level adjustment means. Thus, the same effect as in the case of claim 1 can be expected.

Since the foundation construction device according to claim 5 is the foundation construction device that identifies the anchor bolt support device used in the foundation construction method according to claim 1 in a state including the specific configuration of the level adjuster, it has been described above. the same effects as effects by the level adjuster in claim 1 can be expected.

Builder foundation of claim 6, the anchor bolt support apparatus used strategy for a foundation by claim 2, since a builder foundation specified in condition including a spacing plate, according to claim 2 described above The same effect as in the case of can be expected.

In the anchor bolt supporting device for constructing a foundation according to claim 7 , each anchor bolt is suspended in a self-standing vertical state by screwing each anchor bolt to a template and an auxiliary plate arranged in parallel vertically. Therefore, the upper end threaded portion of each anchor bolt can be erected at an accurate column installation position in order to prevent falling.

In addition, the template and auxiliary plate are flat and the overall structure is simple. The unit price of the parts is low and the assembly work is easy. Therefore, it is possible to reduce the manufacturing cost. By temporarily assembling at the work site into a unitized state, it can be placed and installed on the top edge of the formwork as it is, improving work efficiency at the work site and shortening the work period. Is possible. Furthermore, the height of the grout material to be filled and the height at which the steel column is installed can be set by adjusting the height with the height adjusting bolt.

Building anchor bolt support device of the foundation according to claim 8, since the level adjustment device especially is connected to the anchor bolt through the auxiliary plate may easily precision mounting position stable and level adjustment of the level adjuster Is possible.

  In addition, since the installed steel column can be supported by the top surface of the head of the height adjustment bolt, the support force against the loading load of the steel column is high, and it is firmly supported in combination with the prevention of loosening by the locking holding plate. In addition, since the auxiliary plate is embedded in the foundation concrete, it functions as a fixing plate that resists the pulling force acting on the anchor bolt, and can improve the pulling strength.

  A preferred embodiment in which the present invention is applied to a fabric foundation will be described in detail with reference to the accompanying drawings for a foundation construction method and a construction anchor bolt support device according to the present invention. FIG. 1 is an exploded perspective view of an assembled state. 2 is a cross-sectional view of the main part along the width direction after assembly, and FIG. 3 is a cross-sectional view of the main part along the longitudinal direction after assembly.

  In the illustrated embodiment, a base portion 101 that forms a footing that is a part of the foundation concrete that constitutes the fabric foundation has already been constructed, and a rising reinforcing rod 103 that protrudes from the base portion 101 by connecting the lower end side to the base rebar 102. On the other hand, although it applies to the case where the foundation concrete is placed and the rising portion is constructed, it can also be applied to the case where the base portion and the rising portion are simultaneously constructed by a single concrete placement.

  On the base portion 101, rising reinforcing bars 103 are arranged along the longitudinal direction Y that constructs the pillars at predetermined intervals, and the frame is formed on both the left and right sides of the rising reinforcing bars 103 while being separated in the width direction X. (The formwork shown is a steel formwork) 1 (1A, 1A) is erected, and each formwork 1A is supported using known formwork support means (not shown) and bent into an L shape. A plurality of anchor bolt support devices 3 (3A, 3B) are placed on the top end 2 of the processed mold 1A at predetermined intervals for constructing the pillar.

  As shown in an enlarged front view in FIG. 4, the anchor bolt support device 3 (3A, 3B) includes a template 4 and a plurality of anchor bolts 5 (four in the illustrated embodiment) and auxiliary plates 6 and level adjustment. The tool 7 is configured as a main part and can be assembled on site using these components. However, in order to improve work efficiency at the site, temporary assembly is performed in advance at the factory or a workplace near the site. In this state, a structure that can be placed between the molds 1 is adopted.

  That is, a long template 4 formed in a horizontally long flat plate shape and a short auxiliary plate 6 formed in a rectangular flat plate shape are arranged in parallel in the vertical direction, and are drilled in a vertical communication manner with respect to the plates 4 and 6. The upper end screw portions 5a of the four anchor bolts 5 are inserted into the through holes, and the holding nuts 8 and 9 are screwed into the upper end screw portions 5a so that the plates 4 and 6 can be sandwiched from above and below. I am doing so.

  In the illustrated embodiment, the lower end side of the anchor bolt 5 is bent. However, it is possible to use a necessary number of straight or other known shapes, and the template 4 and the auxiliary plate 6 can be used. As shown by the phantom lines in FIG. 6, the anchor bolt 5 can be inserted into the notch-shaped insertion hole 16 from the side surface and assembled easily. A monitoring window hole 17 is provided.

  The level adjuster 7 is configured such that a height adjusting bolt 11 is screwed into a height adjusting nut 10 connected to the center of the auxiliary plate 6 by welding or other fixing means, and at the center with respect to the screw shaft of the height adjusting bolt 11. A thin plate-like locking and holding plate 12 having a screw hole drilled in it and having a handle portion for rotation operation protruding from one end is mounted.

  When the level adjustment tool 7 loosens the screw of the height adjustment bolt 11 to the height adjustment nut 10, the level adjustment tool 7 can adjust the level by adjusting the height of the top surface of the head of the height adjustment bolt 11. When the latch holding plate 12 is rotated, the height adjustment bolt 11 can be prevented from loosening at the position where it comes into contact with the upper end surface of the height adjustment nut 10.

  The anchor bolt support device 3 is placed on the formwork 1 (1A, 1A) at predetermined intervals for constructing the pillars in such a manner that both sides of the template 4 are installed on the top ends 2 and 2, and each adjacent anchor bolt is supported. The anchor bolts 5 of the devices 3A and 3B are connected by one or two spacing setting plates 13, and the template 4 of each anchor bolt support device 3A and 3B is connected via a detachable holding fixture 14. When both sides are fixed to the top end portion 2, as shown in the partial enlarged front view of FIG. 5A and the partial enlarged plan view of FIG.

  The interval setting plate 13 is formed by a narrow and long plate, and has a structure in which mounting holes 15 for the anchor bolts 5 are provided at predetermined intervals for constructing the pillar, and the two adjacent anchor bolt support devices 3 are provided. The length that can be installed in between is the minimum unit, but a plurality of types are available, such as those that are installed over three adjacent locations, those that change the mounting pitch of the mounting holes 15, etc. It is possible to adopt a form in which an appropriate length and a mounting pitch are selectively used according to the building column structure.

  Further, in the illustrated embodiment, the attachment hole 15 is formed as a notch-like hole so that when the interval setting plate 13 is attached to the anchor bolt support device 3, the holding nut 8 is loosened and the side surface is set. However, it is also possible to adopt a form in which the attachment hole 15 is formed as a circular hole and the holding nut 8 is once removed and mounted.

  The holding fixture 14 has upper and lower support plates 18a and 18b connected by side plates 18c and a U-shaped support member 18 and a screw hole formed in the upper support plate 18a and communicated with the screw hole. The guide cylinder 19 is provided on the upper surface of the upper support plate 18a through a fixing means such as welding, and the lower end side of the screw shaft 20a is screwed into the screw holes of the upper support plate 18a and the guide cylinder 19. The clamp member 20b is provided and the pressure member 20 is provided with a rotary operation piece 20c on the upper end side of the screw shaft 20a.

  The nipping fixture 14 rotates the clamping piece 20b and the lower support plate 18b from above and below the template 4 which is superposed on the top end 2 of the formwork 1A by laying both ends. By rotating the screw shaft 20a of the pressure member 20 with the piece 20c, the template 4 and the top end 2 (2a) of the mold 1A are sandwiched between the clamp piece 20b and the lower support plate 18b. It can be detachably fixed.

  Further, the holding fixture 14 is shared not only when the mold (steel mold) 1A shown in FIG. 5A is used but also when the mold (wood mold) 1B shown in FIG. 5B is used. In this case, both end portions of the template 4 are laid in a superposed state on the top end portion 2b formed of square bars, and the top end portion is the same as in the case of the mold (steel mold) 1A. 2 (2b) can be nipped and detachably fixed in a pressure contact state, but as a simple method, a plurality of nail attachment holes 21 are provided at both ends of the template 4 and 2 (2b) can also be fixed.

  Next, FIG. 7 shows the arrangement state of each anchor bolt support device 3 and the interval setting plate 13 with respect to the formwork 1 for foundation concrete placing including the corners, and intersects at the corners. Anchor bolt support devices 3 are arranged between the top end portions 2 of the respective molds 1 to be arranged at predetermined intervals for constructing the pillars, and are temporarily fixed by the holding fixtures 14, and the adjacent anchor bolt support devices 3 are also fixed. The gaps are connected to each other via a gap setting plate 13 attached to the upper end screw portion 5a of the anchor bolt 5.

  The anchor bolt support device 3 measures the absolute position of the upper end threaded portion 5a of the anchor bolt 5 by using a known surveying means such as transit or the like with respect to the anchor bolt support device 3 provided at the corner or the corner portion, for example. The deviation from the set position is adjusted by adjusting the horizontal position by horizontally moving the template 4, and by adjusting the vertical position by loosening the holding nut 8 and adjusting the vertical position. Since the anchor bolt support device 3 to be positioned is positioned at a substantially fixed position, the accuracy can be further improved by performing fine adjustment as necessary.

  When fine adjustment is performed, for example, by using a general-purpose scale such as a curved scale and the perpendicularity of the interval setting plate 13 with respect to the template 4 is adjusted, horizontal positioning adjustment can be performed. 3 are connected using two interval setting plates 13 arranged in parallel, it is possible to easily and almost automatically adjust the squareness of the interval setting plate 13 with respect to the template 4 by being framed in a rectangular shape. Yes, in the vertical positioning adjustment, the height of the upper end threaded portion 5a of the anchor bolt 5 protruding from the template 4 is made to coincide with the anchor bolt support device 3 provided at the measured corners or corners as a reference. .

  In the anchor bolt support device 3 described above, a parallel interval between the flat template 4 and the auxiliary plate 6 is set as desired, and a plurality of (four in the illustrated embodiment) anchor bolts 5 are provided on each of the plates 4 and 6. The upper end screw portion 5a is inserted, and the anchor bolts 5 and 9 are screwed and fixed to the plates 4 and 6 from above and below by the screwed nuts 8 and 9 so that the anchor bolts 5 are suspended in a vertical state and fall down. It is possible to prevent it.

  In addition, the template 4 and the auxiliary plate 6 are flat and have a simple overall structure, and the unit price is low and the assembly work is easy. By temporarily assembling a unit at a nearby work place and placing it in a united state, it can be placed on the top end 2 of the formwork 1 as it is, so that the work efficiency at the site is improved and the construction period is improved. Can be shortened.

  Further, each anchor bolt support device 3 placed on the top end 2 of the mold 1 is connected to each other by using the interval setting plate 13 to connect the anchor bolts 5 of the adjacent anchor bolt support devices 3 to each other. Since the relative positions of the template 4 and the upper end screw portion 5a of the anchor bolt 5 in each anchor bolt support device 3 can be easily regulated and positioned, the horizontal and vertical positioning adjustment operations for each anchor bolt support device 3 can be performed quickly. And it is possible to carry out with high precision.

  The interval setting plate 13 has a simple structure in which mounting holes 15 for the anchor bolts 5 are provided at predetermined intervals for constructing a column with a narrow long plate, and each anchor bolt 5 of the anchor bolt support device 3 is attached to each anchor bolt 5. Since it is very easy to install, it can be constructed inexpensively and efficiently. By preparing a plurality of types in advance, it can be adapted to various building structures, and the anchor bolt support device 3 After positioning, it can be removed and reused repeatedly.

  Next, the construction of the rising portion and the construction of the pillar with respect to the mold 1 to which the anchor bolt support device 3 is mounted will be described with reference to FIGS. 8 to 10. Both molds 1A are sandwiched between the anchor bolt support device 3 as shown in FIG. , 1A are provided between the partition plates 23 and 23, and when the foundation concrete is placed in the mold 1 from the outside of the partition plate 23, the space between the partition plates 23 and 23 is slightly increased from the bottom side due to the concrete load. Although basic concrete flows in, a rising portion 25 integrated with the base portion 101 is constructed in a state in which a grout filling recess 24 is formed between the partition plates 23 and 23.

  Accordingly, the anchor bolt support device 3 is embedded in the rising portion 25 in such a manner that the upper end screw portion 5a of the anchor bolt 5 and the height adjustment bolt 11 of the level adjuster 7 protrude from the bottom surface of the filling recess 24. However, when placing the foundation concrete, the monitoring window hole 17 prevents the concrete from adhering to the height adjusting nut 10 and the height adjusting bolt 11 of the level adjuster 7 and the threaded portions of the locking holding plate 12. The level of the concrete on the bottom surface of the filling recess 24 is monitored via a seal, and if necessary, a seal member such as a rubber cap is attached to the level adjuster 7 in advance.

  Then, after the cast foundation concrete is hardened, the template 4 is removed from the anchor bolt support device 3 as shown in FIG. 9, and the partition plates 23 and 23 are removed from the filling recess 24, so that the height of the level adjuster 7 is increased. The adjustment bolt 11 is loosened so that the top surface of the head coincides with the level of the rising portion 25, and the locking holding plate 12 is tightened so as to be pressed against the height adjustment nut 10 to prevent loosening. The grouting layer 26 is constructed by filling a grouting material such as non-shrinking mortar or non-shrinking cement into the filling recess 24 including the level up to the top surface of the head 11 and the rising portion 25 of the height adjusting bolt 11.

  Further, after the filled grout material is hardened, the mold 1 is removed as shown in FIG. 10, and the steel column 27 is placed on the top face of the head of the height adjusting bolt 11 and the top face of the grout layer 26, and the steel frame An attachment nut 29 that is inserted into the attachment hole formed in the base plate 28 with respect to the flange-like base plate 28 provided on the lower end side of the column 27 and is screwed into the upper end screw portion 5a. The base plate 28 is fixed, and thereby the steel column 27 can be constructed at a predetermined position of the rising portion 25, but the lower nut of the holding nut 8 of the template 4 is not removed, and the grout layer 26 is not removed. It can also be buried.

  The steel column 27 in the illustrated embodiment has a cross-sectional shape in a plan view and a lower-side column member 27a provided with a flange-like base plate 28 on the top and bottom, and a rectangular tube with a lower end on the upper side. The upper column member 27b is integrally joined to the upper portion 28. However, as a steel column 27 in FIG. 11A described later, a flange-shaped base plate 28 is integrally formed on the lower end side in a rectangular tube shape. For example, steel columns in various known forms can be used.

  In the construction method of the fabric foundation using the anchor bolt support device 3 described above, the height of the grout material to be filled and the height of the steel column 27 are set by adjusting the height of the level adjuster 7 using the height adjusting bolt 11. In addition, since the level adjuster 7 is connected to the anchor bolt 5 via the auxiliary plate 6 in particular, the level adjuster 7 can be mounted at a stable position and the level can be adjusted easily and accurately. It is.

  Moreover, since the installed steel column 27 can be supported by the top surface of the head of the height adjusting bolt 11, the supporting force against the loading load of the steel column 27 is high, and this is combined with the prevention of loosening by the locking holding plate 12. Since the auxiliary plate 6 is embedded in the foundation concrete, it functions as a fixing plate that resists the pulling force acting on the anchor bolt 5 and can improve the pulling strength.

  In particular, the grout layer 26 is formed in the filling recess 24 provided in the rising portion 25 of the fabric foundation so that the steel column 27 is erected, so that the height at which the steel column 27 is installed is substantially the same as the rising portion 25. It is easy to design the building, and the grout material such as non-shrink mortar is used locally, so that the filling and leveling work is easy, and the horizontality and verticality are reduced. It can be increased and the amount of grout used can be reduced.

  Next, another embodiment will be described with reference to FIGS. 11A and 11B. FIG. 11A does not use the partition plate 23 when placing the foundation concrete, and flattens the rising portion 25 without forming the filling recess 24. The grout layer 26 is constructed on the entire upper surface of the rising portion 25, and the other structure and construction method are the same as in the previous embodiment, and the height adjusting bolt 11 of the level adjuster 7 is used. The height of the grout material to be filled and the height at which the steel column 27 is installed are set by adjusting the height of the steel plate 27, and the base plate 28 of the steel column 27 installed at the top surface of the head of the height adjusting bolt 11 is supported. I have to.

  FIG. 11B is similar to FIG. 11A in that the grout layer 26 is constructed on the entire upper surface of the rising portion 25, and the steel column 27 is constructed via the base 30 provided on the grout layer 26. In the illustrated embodiment, a steel base 30 made of H-shaped steel provided with flange portions 30a and 30b on the upper and lower sides of the web is used, and the anchor bolt 5 is fixed to the lower flange portion 30b placed on the grout layer 26. The base plate 28 of the steel column 27 is fixedly screwed to the steel column 27 placed on the upper flange portion 30a.

  The present invention can be applied not only to the fabric foundation according to the illustrated embodiment, but also to an independent foundation or a solid foundation such as a solid foundation, and can take various modifications other than those shown in the scope of the gist. For example, in the illustrated embodiment, a grout layer filled with a grout material such as a non-shrink mortar is provided between the foundation concrete and the column, but the column is constructed directly on the foundation concrete without providing the grout layer. It is also possible to adopt.

  In the illustrated embodiment, the steel column 27 is used as the column, but it is also possible to adopt a form in which a wooden column is used as the column. In the case of a wooden column, for example, the steel base 30 in FIG. Instead, the wooden base is connected to the upper end threaded portion 5a of the anchor bolt 5, and the wooden base and the wooden column are connected to each other, or a hole down joint fitting is attached to the lower side of the wooden column. The form which connects the metal fitting and the upper end screw part 5a of the anchor bolt 5 directly or through a wooden base can be taken.

The disassembled perspective view which shows the assembly state of the fabric foundation construction apparatus by the Example to which this invention is applied. The principal part sectional view along the width direction after the assembly of the cloth foundation construction apparatus of FIG. The principal part sectional view along the longitudinal direction after the assembly of the cloth foundation construction apparatus of FIG. The front view of the anchor bolt support apparatus used for the cloth foundation construction apparatus of FIG. The elements on larger scale of the fabric foundation construction apparatus of FIG. 2 using a steel formwork. The elements on larger scale of the cloth foundation construction apparatus by the modification of FIG. 5A using a wooden formwork. The elements on larger scale of the cloth foundation construction apparatus of FIG. 2 using a steel formwork. The layout of the formwork and anchor bolt support device for foundation concrete placement including a corner. It is the construction state which built the foundation concrete in the formwork, and constructed | assembled the standing part, Comprising: (a) is a partial expanded plan view, (b) is a partial expanded sectional view. FIG. 9 is a construction state in which a grout layer is constructed in the recess on the rising portion of FIG. 8, (a) is a partially enlarged plan view, and (b) is a partially enlarged sectional view. It is the construction state which constructed the steel column on the grout layer of Drawing 9, and (a) is a partial expansion plan view, and (b) is a partial expansion sectional view. The partial expanded sectional view of the construction state by the modification which constructed | assembled the steel column on the grout layer. The partial expanded sectional view of the construction state by the other modification which constructed | assembled the steel column through the foundation on the grout layer by a modification.

Explanation of symbols

1 Formwork 1A (Steel) Formwork 1B (Wood) Formwork 2 Top End 2a Top End 2a (Steel Formwork) Top End 3 (3A, 3B) Anchor Bolt Support Device 4 Template 5 Anchor bolt 6 Auxiliary plate 7 Level adjusting tool 8, 9 Nipping nut 10 Height adjusting nut 11 Height adjusting bolt 12 Locking holding plate 13 Interval setting plate 14 Nipping fixture 15 Mounting hole 16 Insertion hole 17 Monitoring window hole 18 Support member 19 Guide tube 20 Pressurizing member 21 Mounting hole 22 Nail 23 Partition plate 24 Filling recess 25 Rising portion 26 Grout layer 27 Steel column 28 Base plate 29 Mounting nut 30 Base

Claims (8)

Prepare an anchor bolt support device that anchors the upper end screw to the template and suspends the anchor bolt, and supports the anchor bolt at each column installation position in such a way that both ends of the template are installed between the top ends of the formwork. A method for constructing a foundation in which the concrete is placed and the upper end screw portion of each anchor bolt support device is positioned, and then the both ends of the template are fixed to the top end portion of the formwork and the foundation concrete is placed,
In the anchor bolt support device, an auxiliary plate connected to the upper end threaded portion of the anchor bolt is provided in parallel and spaced apart from the lower side of the template, and a level adjuster equipped with a height adjustment bolt is provided on the auxiliary plate to assist After placing the concrete in the formwork so that the head of the height adjustment bolt protrudes by embedding the plate, remove the template and reach the top surface of the height adjustment bolt head set on the ground contact surface of the column A foundation construction method characterized in that a grout layer is formed by filling grout material on foundation concrete . 2. A long interval setting plate provided with a mounting hole for connecting to an anchor bolt at every predetermined interval for constructing a pillar is prepared, and positioning is performed by detachably connecting adjacent anchor bolt support devices. The foundation construction method described in 1 . A removable partition plate is provided between the molds with the anchor bolt support device interposed therebetween, foundation concrete is placed in the mold from the outside of the partition plate, and a grout filling recess is formed between the partition plates. The foundation construction method according to claim 1 or 2 , wherein a grout layer is locally formed by filling a grout material between partition plates. Prepare an anchor bolt support device that anchors the upper end screw to the template and suspends the anchor bolt, and supports the anchor bolt at each column installation position in such a way that both ends of the template are installed between the top ends of the formwork. While placing the device, after positioning the upper end screw portion of each anchor bolt support device, it is a foundation construction device for fixing the both ends of the template to the top end portion of the formwork and placing foundation concrete,
The anchor bolt support device includes a flat template laid between the molds, an auxiliary plate spaced in parallel to the lower side of the template, an upper end screw portion passing through the template and the auxiliary plate, and an upper end screw. And an anchor bolt that is fixed by holding the template and the auxiliary plate from above and below with a holding nut screwed to the portion, and the auxiliary plate has a height adjusting bolt that sets the upper surface of the grout layer on which the column is installed A base construction apparatus characterized by comprising a level adjustment tool provided with The level adjuster includes a height adjusting nut fixed to the auxiliary plate, a height adjusting bolt capable of adjusting the height of the head top surface by screwing a screw shaft into the height adjusting nut, and a height adjusting bolt. 5. A foundation construction apparatus according to claim 4 , further comprising a locking holding plate that is provided with a screw hole that is screwed into the screw shaft to prevent the height adjusting bolt from loosening . Between each adjacent anchor bolt support device, a long interval setting plate having mounting holes connected to the anchor bolts is installed at every predetermined interval for constructing the pillar, and the upper end screw of the anchor bolt is installed through the mounting holes. The foundation construction device according to claim 4 or 5, wherein the foundation construction device is detachably connected to the unit. An anchor bolt support device for mounting an anchor bolt to a template by screwing the upper end screw portion and mounting each end of the template at each column installation position in a manner that the both ends of the template are installed between the top ends of the mold. And
A flat template laid between the molds, an auxiliary plate spaced in parallel to the lower side of the template, and an upper threaded portion inserted through the template and the auxiliary plate, and screwed into the upper threaded portion. A level adjuster with a height adjustment bolt that sets the upper surface of the grout layer on which the column is installed on the auxiliary plate. An anchor bolt support device for constructing a foundation, characterized in that it is provided . It said level adjuster includes a height adjusting nut fixed to the auxiliary plate, the height adjustment nut screw shaft screwed with adjustable height of the head top surface to a height adjustment bolt, the height adjustment bolt The anchor bolt support device for constructing a foundation according to claim 7 , further comprising a locking holding plate that is provided with a screw hole that is screwed into the screw shaft of the screw and that prevents the height adjusting bolt from loosening.

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