JPH0532536B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Object of the invention (industrial field of application) The present invention is a method and device for leveling a foundation pillar surface used in the construction industry. More specifically, the present invention relates to a method and apparatus for accurately setting a reference plane for a pillar and installing an anchor bolt at the position of the pillar by using a ruler plate for the pillar.

(Prior art) Conventionally, the leveling of the pillar surface of a foundation for a steel-framed building was carried out using a root cut of 30 mm, as shown in Figure 15 of the drawing.
A formwork 32 is constructed using wooden panels 31 on the leveled concrete inside, and wooden blocks 33, 33 are fixed to the upper edge of this formwork 32 at predetermined intervals, and 3 to 4 wooden blocks are placed on top of these wooden panels 33. After attaching the anchor plate 36 with the anchor bolt 34 suspended from the nut 35, concrete is poured into the formwork 32 and cured for a predetermined period of time, after which the formwork 32 is taken apart and the root cutting 30 is filled in. This was done by placing the pillars back together, then applying level mortar to the desired height and leveling the pillars, and completing the surface of the pillars.

(Problem to be Solved by the Invention) In the conventional method described above, the anchor bolt 34 is simply suspended from the anchor plate 36 by the nut 35, so when concrete is placed, the fluid pressure applied thereto causes the anchor bolt 34 to tilt. When the steel column is erected, the anchor bolt 34 will not fit into the hole drilled in the mounting plate, and it will be necessary to correct it so that it stands upright. Not only does it take a lot of time and effort, but the threads of the anchor bolt 34 are damaged during the repair, making it difficult to tighten the nut 35.

The height and level of the pillar surface are set by applying level concrete to the position of the pillar on the foundation, so a skilled person is required for the work. This is usually done after curing for 1 to 2 days, and then the pillars must be allowed to harden until they have sufficient support, and then the pillars must be erected, resulting in double work and poor workability and performance.

It had the following problems.

The present invention was made in order to solve the above-mentioned conventional problems, and includes a ruler plate for pillar construction, which has a hole in the center to form a reference plane for pillar construction, and supports anchor bolts on the outside. After accurately setting the height, horizontality, and direction using the adjustment means of three or more support rods,
The object of the present invention is to provide a method and apparatus for embedding anchor bolts and pouring concrete to form a reference surface to accurately level the pillar surface at the pillar construction position.

B. Structure of the Invention (Means for Solving the Problems) The means of the present invention for achieving the above-mentioned object is to suspend three or more support rods at equal intervals onto the leveled concrete at each pillar erecting position of the foundation. a step of setting the height and horizontality of the pillar-erecting ruler plate supported by these support rods by operating an adjusting means provided on the support rod; and a step of setting the orientation of the pillar-erecting ruler plate as a direction reference. The process of setting the index to the line, and the process of embedding and fixing the anchor bolt supported by the ruler plate after setting the height, horizontal, and direction, in concrete.
A method for leveling a foundation pillar surface comprising the steps of filling concrete into a hole provided in the center of the ruler plate, aligning it with the ruler plate, and forming a reference surface for the pillar after the ruler plate is removed. Three or more support rods are placed vertically on the leveled concrete at equal intervals, and the upper and lower adjustment nuts are screwed into the screws of these support rods. , a ruler plate for pillar construction that can be freely adjusted longitudinally and horizontally, an anchor bolt fixed by the ruler plate hex nut, an index provided on the ruler plate to align its direction with the direction reference line, and The structure of the device for leveling a foundation pillar surface includes a hole filled with concrete in the center and a hole for forming a reference surface for the pillar after the ruler plate is removed.

However, in this method and equipment, the leveled concrete is used as a reference for the horizontal device between the foundation formwork and the ruler board for setting standards for the erection pillars, and the leveled concrete is placed within the root cut dug on the site with a thickness of 30 to 70 mm. After it hardens, mark the installation position of the formwork and the installation position of the support rod of the ruler plate for the pillar on the surface, and match it with this marking. The foundation formwork is installed and the support rods for the ruler plates are installed.

The support rod is used to support the ruler plate for the pillar construction.The material used for the support rod is shaped steel or steel bar.In the case of steel bar, a thread is formed at the top, and in the case of shaped steel, the screw is welded to the top. In order to set these support rods in the correct relative position and upright position, they are placed at equal intervals on a base member made of a cut plate or a frame-shaped base member formed by bending a section or steel bar. Three or more, usually three or four, are fixed at the top of these support rods, and the lower pair of adjustment nuts are screwed into the screws provided in the above manner so as to hold the ruler plate for the pillar construction, which will be described later. It is matched.

Ruler plates for pillar erection are used to accurately and easily set the height, horizontality, and direction of the erection surface of a steel frame column.A steel plate is cut to the required size, and the above-mentioned support is placed on the outside of the ruler plate. A hole or notch is provided to match the rod,
These holes or notches are passed through the support rod, and the upper and lower adjustment nuts screwed onto the screws of the support rod are inserted into the support rod, and each part of the ruler plate can be freely raised and lowered by operating each adjustment nut to adjust the height and height. In addition to making it easy to set the horizontal level, a space is created between the support rod and the hole through which it passes, and the orientation of the ruler plate can be corrected by moving horizontally in this space. The board should be provided with two or four marks on the vertical or horizontal center line, or if necessary, the outer edge of the ruler board could be used as the marks, and these marks should be aligned with the direction reference line described below. , the direction of the ruler board is set.

As will be described later, it is economical to remove the ruler plate after forming the reference plane of the pillar with concrete and reuse it for the next foundation construction.

The direction reference line is a line that aligns the respective ruler plates installed in each root cutting, and is a line that displays a straight line connecting each pillar erection position with a thread or a light beam, etc. When the indicators are aligned, the orientation of each ruler plate is aligned correctly, and if a thread is used as a reference, a plumb bob with a hanging thread is used in conjunction with this.

Anchor bolts are used to connect the mounting plate of columns by being buried in the foundation, and as is known, the lower end is bent into a U-shape, hook shape, etc., and a nut that sets the embedding depth is screwed into the bolt. Insert it into the hole provided between each support rod of the ruler plate, screw the fastening nut onto it,
It is fixed in place so that it will not shift or tilt even when the concrete flow pressure is applied, and it is buried in the concrete so that there is an adjustment space between it and the ruler plate.

The hole provided in the center of the ruler plate for pillar construction is filled with concrete from this part to form the reference surface for the pillar.The created reference surface can withstand the load of the pillar and maintain it in a stable state. Fill the hole with concrete until it reaches the concrete for the column foundation in which the anchor bolt will be embedded, and level the top surface so that it is even with the ruler plate. You can easily obtain a reference surface that is aligned in height and horizontally with the ruler plate, so after the concrete has hardened, remove the ruler plate and erect the column on the reference surface, and the column mounting plate will be supported only at its center. Since there is a space around the anchor bolt, the inclination of columns other than those of heavy columns can be easily corrected by adjusting the nut screwed into the anchor bolt.

(Function) The method and apparatus of the present invention configured as described above includes applying leveled concrete horizontally in a root cutting excavated at a predetermined position, and constructing a formwork at a fixed position on the leveled concrete. After that, place a base member with three or more support rods vertically attached at equal intervals in a fixed position within the formwork, fix this base member so that it does not move with a stopper, and attach it to the top of each support rod. If you attach a ruler plate for building a pillar by inserting it into the upper and lower adjustment nuts screwed into the screws provided in this part, the ruler plate will be supported so that it can move up and down, forward and backward, and left and right. In addition, it is not necessary to attach the ruler plate to the support rod after installing the support rod in the formwork. Instead, attach the ruler plate to the support rod and then install the support rod into the formwork. There is no problem.

Once the ruler plates are installed in this way, adjust the adjustment nuts of each set relative to each other, and use a measuring tool such as a level to accurately adjust the ruler plates so that they are horizontal at the desired height. Move the ruler plate laterally using the gap between the hole, the support rod, and the hole so that the index on the ruler plate is aligned with the direction reference line of the straight line connecting the positions. After correcting the direction of the ruler plate, tighten the adjustment nut. Tighten to fix the ruler plate, insert the anchor bolt whose burial depth is determined by the nut into the hole for the anchor bolt in the ruler plate, screw the locking nut into the part that comes out above the ruler plate, and tighten. Then, the anchor bolt is fixed so that it will not move due to external force.
Incidentally, the above-mentioned anchor bolts may be attached, if necessary, before the ruler plate is supported by the support rod.

After setting the height, horizontality, and direction of the ruler plate as described above, pour the concrete for the column foundation into the formwork so that there is a space for adjustment between the ruler plate and the anchor bolt. Because it is inserted into the concrete in an upright position without shifting or tilting due to the flow pressure,
Following this concrete pouring, fill the hole in the center of the ruler board with concrete until it reaches the next concrete layer, level the top surface so that it is flush with the ruler board, and then fill the hole with concrete. Since concrete forms the reference surface for the pillars, after the concrete hardens, remove the fixing nut of the anchor bolt and the adjustment nut on the top of the support rod, remove the ruler plate, and remove the support rod from use. If you cut and remove the part and erect the pillar on the reference plane of the pillar, the anchor bolt will pass through the bolt hole provided in the mounting plate easily and reliably, so you can screw the locking nut onto it and temporarily tighten it. For example, only the central part of the mounting plate of the column is supported by the reference plane of the column, and it is stable in an almost upright state on top of it, but the column often has a slight inclination, so in this case , when adjusted with the nut screwed into the anchor bolt, the column is supported only in the center.
The inclination can be easily corrected so that it stands correctly on the reference plane.

If the pillar is heavy, it may be difficult to adjust the inclination of the pillar by operating the nut of the anchor bolt. The tilt can be corrected by pulling the column by operation.

(Example) Next, an example of a method and apparatus for leveling a foundation pillar surface according to the present invention will be described with reference to FIGS. 1 to 12 of the drawings.

In the drawings, 1 is a predetermined number of root cuts excavated at the position of the pillars on the site where the foundation will be constructed, and
As shown in Figure 3, the dimensions are the standard volume of the column foundation, the dimensions of the formwork used to form it, and a working space of approximately 15 cm outside the formwork.

2 is leveled concrete, which is poured into the root cut 1 described above as shown in Figure 3, and its upper surface is finished to be accurately horizontal, and the installation position of the formwork described later and the construction described later are determined. Mark out the installation positions of the support rods of the pillar ruler plate with marks 3 and 4, and install the formwork and the base member of the support rod of the ruler plate, which will be described later, according to these markings 3 and 4.The formwork and the ruler plate It is arranged so that it is accurately installed in a horizontal state almost in a fixed position.

5 is a formwork that forms the foundation, and as shown in Figure 10, it uses a so-called fill-in type that does not take off the form after pouring concrete, and has a length and width that match the foundation dimensions and a thickness of 15 to 15 mm. Four 50mm square panels a
The square formwork 5 can be easily formed using connecting fittings, etc. by connecting them by intersecting A and B as shown in Fig. 14, and the constituent materials thereof include concrete, ceramics, and reinforced plastics. , can withstand the forming pressure of other concrete, transport,
A material that is difficult to break during handling is used, and this fill-in type formwork 5 is used in places where the cutting area is restricted because the thickness of the panel a used is thin, and the root cutting position to be excavated is close to the neighboring land. However, since it can be molded and the root cutting is smaller due to the thinness of the panels, excavation is easier, the amount of leftover soil and backfill soil is reduced, and the labor and time required for disposal are reduced. Although it has its characteristics, panels are not necessarily limited to the fill-in type.

Reference numeral 6 denotes four support rods installed in the formwork 5 described above, whose lower ends are fixed to the plate-shaped base member 7 by welding or the like, so that they stand upright on the base member 7 at equal intervals, and each support rod Screws 8 are provided at the top of each of the rods 6, and as shown in FIG. 10, these screws 8 are screwed into upper and lower adjustment nuts 9 and 9' that sandwich a ruler plate for pillar erection, which will be described later, from above and below. Then, four holes 10 are drilled in the base member 7 described above, and nails 11 are driven into the leveled concrete 2 through the holes 10.
The base member 7 is leveled and fixed to the concrete 2.

Reference numeral 12 denotes a bottom reinforcing bar that is assembled into the formwork 5 slightly above the base member 7 after the base member 7 is fixed to the leveled concrete 2, a part of which passes over the base member 7, and is attached to the foundation. This serves to strengthen the concrete and securely fix the base member 7.

Reference numeral 13 designates a ruler plate for erecting pillars, with four holes 14 made to match the support rods 6 described above so as to allow the ruler plate 13 to move slightly from front to back and from side to side. When it is passed through, the ruler plate 13 rides on the lower adjustment nut 9 screwed onto the screw 8 of the support rod 6, so the screw 8 is placed on the ruler plate 13.
When the upper adjustment nuts 9' are screwed together, the ruler plate 13 is held between the adjustment nuts 9 and 9' from above and below, and can be freely moved up and down by adjusting each set of adjustment nuts 9 and 9'. , can be freely moved in height and horizontally, and can also be freely adjusted in the lateral direction using upper and lower adjustment nuts 9, 9'.

15 is an anchor bolt, and as is well known, the lower end is U
Using a piece bent into a letter shape, four holes 1 were bored in the ruler plate 13 so as to be located between the support rods 6.
6, screw the nut 17 that sets the depth and insert it through, screw the tightening nut 17' onto the part that protrudes above the ruler plate 13, sandwich the ruler plate 13, and tighten both nuts 17, 17'. Since the anchor bolt 15 does not shift or tilt even if the fluid pressure is applied during pouring of concrete and remains stable in the fixed position, the tightening nut 17' is removed after the concrete hardens. When the pillar 18 is erected on the ruler plate 13, the anchor bolt 15 is reliably and easily inserted into the hole 20 provided in the mounting plate 19.

21 is provided at the center of the ruler plate 13 described above,
A hole with a diameter of approximately 10 mm is formed to form the reference surface 22 of the pillar, and when the concrete is filled from this hole 21 until it reaches the concrete layer that was poured earlier and is leveled with the ruler plate 13, the pillar 18 is formed. The reference plane 22 of the concrete pillar supporting the central part of the mounting plate 19 of
is formed, so when the pillar 18 is erected on this reference surface 22 after removing the ruler plate 13, the pillar 18 will be supported only at the center part of the mounting plate 19, and the outside part through which the anchor bolt 15 will pass will be supported by the pillar 18. Since there is a space in the pillar 18, the inclination of the pillar 18 can be easily adjusted by adjusting the nuts 17 and 17' to which the anchor bolt 15 is threaded after the pillar is erected.

23 is each ruler board 1 after setting the height and horizontal
3, use a water line strung in a straight line across each pillar position, match the hanging line 24 to this water line and lower it to hang the plumb bob 25. The ruler plates 13 are laterally adjusted in position and their orientations are set so that the tips of the rulers match the indicators 26 provided on each ruler plate 13.

Reference numeral 27 is a plumb bob used to correct the inclination of the pillar 18 after the pillar has been erected. The presence or absence of inclination of the pillar 18 is measured based on the opening dimension.

Next, details of the leveling method using the apparatus shown in the above embodiment will be explained.

Dig root cuts 1 of the required volume on the site according to the number of building columns, as shown in Figures 1 and 2, and pour leveled concrete 2 to a depth of about 50 mm at the bottom of each root cut 1. After leveling the upper surface horizontally and solidifying it, mark out on the surface of the leveled concrete 2 the position where the formwork 5 will be assembled and the installation position of the base member 7 attached to the support rod 6 of the ruler plate 13. I got 3 or 4.

Next, at a concrete molding factory, the concrete panel a was molded to a thickness of 25 mm according to the length, width, and mold dimensions, and had interlocking holes A and B for connection at both ends, and then transported to the site. of,
When erected in line with the markings 3 on the leveled concrete 2 in the root cut 1 and combined with the intersecting parts A and B as shown in Fig. 14, the concrete panel a becomes:
It does not require connecting fittings and forms a rectangular formwork 5 as shown in Fig. 4. By backfilling the space between this formwork 5 and the root cutting 1 with soil, the formwork is formed as shown in Fig. 10. 5
was fixed.

After fixing this formwork 5, a base member 7 with a supporting rod 6 attached thereto is placed at a position determined by markings 4, and this member 7 is leveled and nailed 11 to the concrete 2.
Fix it by attaching it, screw the adjustment nut 9 into the lower part of the screw 8 provided on the upper part of the support rod 6, put the ruler plate 13 for pillar erection on top of it through the hole 14,
When the upper adjustment nut 9' is screwed into the part of the screw 8 that protrudes above the ruler plate 13, the ruler plate 13 is adjusted to the seventh position.
As shown in the figure, it is supported so that it can move up and down by adjusting the adjustment nuts 9 and 9', so the upper surface of the ruler plate 13 is measured in two intersecting directions using a known level, and its height and horizontal The deviation was corrected by operating the adjusting nuts 9, 9', and the height and leveling of the ruler plate 13 were accurately determined.

Next, string the water thread 23 of the direction base line so as to connect the center of each pillar position, match the hanging thread 24 to this water thread 23, and attach it to four places on the ruler plate 13 as shown in Fig. 6. As shown in FIG. 7, the plumb bob 25 is suspended, and the ruler plate 13 is moved back and forth and left and right so that the indicator 26 on the ruler plate 13 is aligned with the tip of the plumb bob 25. When they are aligned, the fixing nut 9' is tightened, and the orientation of the ruler plates 13 is set so that the upper surface of the ruler plates 13 is aligned with the pillar construction surface and is horizontal, and the directions of each ruler plate 13 are also accurately aligned. .

Therefore, insert the anchor bolt 15 whose embedment depth into the concrete is determined by the lower positioning nut 17 into the hole 16 drilled in the ruler plate 13, and screw the fastening nut 17' into the part that comes out above the ruler plate 13. When the anchor bolts 15 are combined and tightened, the anchor bolts 15 are fixed so as not to tilt or shift due to external forces, and the amount of protrusion of the threaded portions becomes uniform.

When the anchor bolt 15 is fixed in this way, a bottom reinforcing bar 12 is assembled at the lower part of the mold rack 5 so that a part thereof straddles the base member 7 as shown in FIG. Ruler plate 1 as shown in the figure
Concrete is poured so that there is a gap of about 50 mm under the ruler plate 3, a column foundation is formed, and the anchor bolt 15 is embedded and fixed therein. Concrete was poured into the hole 21 forming the reference surface of the column until it reached the previously poured concrete layer, and the top surface 22 of the concrete was leveled accurately according to the ruler plate 13 and cured for two days.

Thereafter, as shown in FIG. 11, the tightening bolt 17' of the anchor bolt 15 is removed, the support rod 6 protruding from the concrete is cut, and the anchor bolt 15 is inserted into the hole 20 provided in the mounting plate 19 of the column 18.
through the center part of the mounting plate 19 to the reference plane 2 of the pillar.
2 and temporarily tighten it by screwing the tightening nut 17' onto the anchor bolt 15. Measure the standing position of the pillar 18 on the reference surface 22 with the plumb bob 27 as shown in the same figure, and check if there is any deviation. If there is, correct the misalignment by operating the nuts 17, 17' screwed onto the anchor bolt 15, and when the pillar 18 stands vertically,
When the tightening nut 17' is tightened, the column 18 is easily and quickly vertically erected.
As shown in Figure 2, when concrete is press-fitted into the space below the mounting plate 19 and allowed to solidify, the mounting plate 19 of the column 18 is supported on its entire surface by the concrete, so it can be hung from the column 18 to the desired height. It was easy to complete the pillar foundation to stabilize the structure.

As a result of adopting this method, for a foundation with eight pillars erected in an area of ^100m2 , the time required from cutting the roots to completing the foundation was 4.5 days, which was cut in half compared to the nine days of the conventional construction method. Moreover, the completed foundation had sufficient height, horizontal and directional accuracy even if the worker was not an expert.

C. Effects of the Invention The method and device for leveling a pillar surface according to the present invention have anchor bolts supported on a ruler plate for pillar construction, and a hole is provided in the center to form a reference surface for the pillar construction. By setting the height, horizontal, and orientation of the ruler plate and embedding anchor bolts in concrete and forming a reference surface, it is easy to level the pillar surface with accurate height and orientation at the foundation pillar construction position. , can be done quickly.

The above-mentioned ruler plate for pillar erection is supported by three or more support rods so that it can be freely adjusted up and down, forward and backward, left and right, so the height and horizontality of the ruler plate can be easily set by operating nuts. Since it is easy to move the ruler plate laterally between the nuts and set its direction, even an unskilled person can quickly and accurately adjust the ruler plate.

Since the anchor bolt is fixed to the ruler plate with the upper and lower nuts, the anchor bolt remains stable even when the fluid pressure is applied during concrete pouring.
It maintains the set position and vertical state, and when the pillar is erected, the anchor bolt fits directly into the hole in the mounting plate, and no correction is required, which saves the time and effort that was conventionally required.

Concrete is poured into the holes made on the ruler plate to form the reference plane for the pillars, so by leveling the poured concrete to the ruler plate, the correct height and horizontal reference plane can be created at the same time as the column foundation is poured. Because it is formed, there is no need for level concrete pouring as in the past, and the labor and time required for this can also be saved.

It has the following unique effects.

[Brief explanation of the drawing]

1 to 12 show an embodiment of the method and apparatus according to the present invention, and FIG. 1 is a sectional view of a state in which a root is cut to a site. Figure 2 is a plan view of the same as above. Figure 3 is a perspective view of pouring leveled concrete at the bottom of the root cut. Figure 4 is a perspective view of the formwork installed on leveled concrete. FIG. 5 is a perspective view of the support rod for the ruler plate for pillar erection installed in the formwork. FIG. 6 is a perspective view of the height and horizontal setting of the ruler plate described above. 7th
The figure is a cross-sectional view of the height and horizontal settings of multiple ruler plates arranged in parallel. FIG. 8 is a perspective view of the anchor bolt supported by the ruler plate. Figure 9 is a perspective view of the column foundation concrete poured into the formwork.
FIG. 10 is a cross-sectional view of the state in which the holes in the ruler plate are filled with concrete to form the reference plane for the pillars. FIG. 11 is a sectional view of a state in which a column is erected with a mounting plate placed on a reference surface and its standing is corrected. Figure 12 is a cross-sectional view of the pillar after it has been erected, the nuts of the anchor bolts are tightened, and the space under the mounting plate is filled with concrete to complete the erection of the pillar. FIG. 13 is a perspective view showing the ruler plate. FIG. 14 is a perspective view showing a part of a concrete panel for formwork. FIG. 15 is a perspective view showing the leveling state of the conventional foundation pillar construction surface. In the figure, 2 is leveled concrete, 6 is a support rod, 7 is a base member, 8 is a screw, 9, 9' is an adjustment nut,
13 is a ruler plate, 14 is a hole, 15 is an anchor bolt, 17, 17' is a nut, 22 is a reference plane for the pillar,
21 is a hole through which a support surface 22 is formed.

Claims (1)

[Claims] 1. A step of vertically standing three or more support rods at equal intervals on the leveled cocrete at each pillar erection position of the foundation, and the height of the pillar erection ruler plate supported by these support rods. a step of setting the horizontal level by operating an adjustment means provided on the support rod; a step of setting the orientation of the pillar erection ruler plate by aligning the indicator with the direction reference line; and setting the height, horizontal, and direction. The process of embedding and fixing the anchor bolts supported by the ruler plate in the concrete, filling the hole in the center of the ruler plate with concrete, aligning it with the ruler plate, and removing the ruler plate, is followed by the construction process. A method for leveling a foundation column surface, comprising the step of forming a reference surface for a column. 2 Place them vertically on the leveled concrete at equal intervals,
Three or more support rods with screws on the top, and a ruler plate for pillar construction that can be adjusted vertically, forward and backward, and left and right by being held between upper and lower adjustment nuts that are screwed into the screws of these support rods; The anchor bolt fixed by this ruler plate hennat, the indicator provided on the ruler plate to align its direction with the direction reference line, and the center of the ruler plate are filled with concrete, and after the ruler plate is removed, the pillar is erected. 1. A device for leveling a foundation pillar surface, characterized in that it is provided with a hole for forming a reference surface for foundation use.