JP2694431B2 - Construction method of anchor bolt - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing an anchor bolt used for fixing a column base of a building. 2. Description of the Related Art As a method for fixing a column base of a building or the like to a foundation structure, there are an embedding type, a root winding type and an anchor bolt type, but the space used for the foundation floor can be widened. In addition, anchor bolts are often used because of good workability. The anchor bolt type is one in which anchor bolts are embedded in concrete of a foundation structure. Generally, the construction method is as shown in FIG. Anchor bolts 15 are attached to the steel frame 24 and concrete is poured to embed the anchor bolts 15. This method has the advantage that the anchor bolts 15 can be firmly fixed, but since the steel frame 24 is manufactured by welding at the factory and brought to the site, heavy equipment such as a tow truck is required, and Since the frame 24 is large, it interferes with the reinforcement of the foundation structure. Further, since it is attached and fixed by welding, it is difficult to correct the position, and the workability is poor. In view of the above, there has been proposed a system in which the frame is assembled by the anchor bolts themselves without using the steel frame as described above (see Japanese Utility Model Laid-Open No. 60-58645). As shown in FIG. 11, this anchor has a lower end portion of an anchor bolt 15 fixed to a fixing plate 25 installed on the foundation ground and an upper end portion fixed by an auxiliary plate 14, thereby making a conventional large-sized steel bolt. This allows for robust assembly without using a frame. [0005] However, the improved type described above requires a small amount of adjustment in the height direction of the anchor bolt, so that it is difficult to apply the anchor bolt to various substructures having different thicknesses. It is necessary to prepare various bolt lengths with a difference of 100mm pitch, resulting in high cost and labor for production and inventory. Further, an anchor bolt having a length longer than the design strength not only causes a high cost, but also is heavy, and thus the workability is deteriorated. Furthermore, when dealing with a corner post, it is difficult to fit the nut with washer at the bottom. Moreover, in its construction, after fixing the fixing plate to a predetermined position of the foundation ground in advance, a plurality of anchor bolts are erected, and further, the upper end portions of these are fixed by an addition plate, The upper end of the anchor bolt may shift from the predetermined position due to twisting or the like. In this case, it is necessary to correct it by loosening nuts at both ends of the anchor bolt, and some problems remain in terms of construction. The present invention is intended to improve the above-mentioned conventional method, and it is not necessary to prepare many kinds of anchor bolts for construction, and it is possible to use anchor bolts having a short length. Furthermore, it is an object of the present invention to provide an anchor bolt construction method that improves the construction workability such as positioning work and that is easy to construct on a corner post. The structure of the present invention will be described with reference to FIGS. 1 to 9 corresponding to the embodiments. An anchor frame 1 in which a plurality of rods 7 having fixing means 13 for anchor bolts 15 are erected is placed on the ground 23, while a plurality of anchor bolts 1 are provided at predetermined hole positions of the template 14.
5 and 15 are vertically installed to fix the anchor bolt 15 at a position corresponding to the fixing means 13 of the vertical rod 7 to the vertical rod 7 through the fixing means 13 to a required vertical position, and in that state, After aligning the template 14 at a predetermined horizontal position, the base 2 is tightened through the mounting holes 6 and 6 formed in the base 2 to tighten the stencon anchor bodies 5 and 5 and the tightening body attached thereto. It is characterized in that it is fixed at a predetermined position on the ground 23. Embodiments of the present invention will be described below with reference to the drawings. 1 to 6, reference numeral 1 denotes an anchor frame used in the construction method of the present invention, which is composed of a base 2 and a plurality of rods 7, 7. The base 2 is formed in the shape of a rectangular frame by an angle member, and fixing bolts 3 and 3 project inwardly at the four corners by welding, and the nut 4 is screwed. In addition, the angle members on each side of the base 2 are provided with mounting holes 6 and 6 which are inserted into the stercon anchor main body 5 embedded in the ground (disposed concrete) 23. The mounting holes 6 and 6
Are formed to be larger than the outer diameter of the main body 5 of the STECON anchor to be used, and a gap is left around the main body 5 of the STECON anchor. Further, the rod 7 is formed by an angle member so as to be vertically long, and an insertion hole 8 for the fixing bolt 3 is provided at a ridge portion at a lower end portion thereof. On the upper part of the rod 7, an L-shaped member 10 is fixed to an upright half receiving portion 9 which is bent inward of an angle member, and an insertion hole 11 is formed between them. Anchor bolt fixing means 13 in which a push bolt 12 is screwed so as to move back and forth is provided. On the other hand, 14 (see FIGS. 1 and 6) is a template in which a plurality (12 in the embodiment) of anchor bolts 15 are joined and erected at the upper portion thereof, which is formed in a rectangular shape and has four corners. A plurality of mounting holes (not shown) are provided in the peripheral portion including the portions at substantially equal intervals. The anchor bolt 15 is provided with external threads 16 and 17 at the upper end and the lower end, and the external thread 16 at the upper end is formed relatively long. Each of the anchor bolts 15 is attached by inserting an outer end screw 16 of the upper end thereof into a hole of the template 14 and sandwiching the nuts 18 and 18 screwed from both upper and lower surfaces of the template 16.
A nut 19 is also screwed into an outer screw 17 at the lower end of the anchor bolt 15. The group of anchor bolts 15 suspended from the template 14 as described above is located at the four corners of the template 14 in positions corresponding to the fixing means 13 of the rods 7 and 7, respectively. The anchor bolts 15 and 15 are inserted from their lower ends into the insertion holes 11 and 11 of the fixing means 13 in the rods 7 and 7.
Then, push bolts 12 and 12 are tightened and fixed at an appropriate height. It should be noted that the four anchor bolts 15 are previously inserted into the insertion holes 11 of the fixing means 13 in the rod 7 and temporarily fixed by the push bolts 12, and then the anchor bolts
It is of course possible to attach the template 14 to the upper end of the bolt 15. 7 to 9 show another example of the anchor frame used in the construction method of the present invention. The use of an angle member for the rod 7 is the same as the anchor frame of the above embodiment. There are bolts 3 fixed to the four corners of the base 2.
In place of the bolt insertion holes 20 and 20, the lower end of the rod 7 corresponds to the bolt insertion hole 2
1, 21 are provided, and the rod 7 is attached to the corner of the base 2 as shown in the figure, and is fixed by mounting bolts and nuts (not shown). In addition, vertical rod 7
The anchor bolt fixing means 13 in the upper part of the above is fixed to the upper end of the rod 7 with a bracket 22 made of an angle member or the like, and the angle members are fixed to each other at both ends to form the insertion hole 1 of the anchor bolt 15. A push bolt 12 is screwed into one of the angle members and is fixed to the bracket 22. Anchor used in the construction method of the present invention
The frame is configured as described above, and in the construction, first, the main body of the Stainon anchors 5, 5 is embedded in the ground, and the base 2 is fitted and mounted on the ground through the mounting holes 6, 6, and further, The lower ends of the rods 7, 7 are attached to the four corners of the base 2 so as to be fixed and erected. Then template 14
Anchor bolts 15 and 15 are vertically installed on the rails, and four bolts at the corners are inserted into the insertion holes 11 of the anchor bolt fixing means 13 of the rods 7 and 7 and fixed. After the assembly is completed in this way, the base 14 is appropriately slid in the horizontal direction by using a plumb bob (not shown) to bring the template 14 into a predetermined position. Tighten a nut as a tightening body into the anchor bodies 5 and 5 to fix the base 2 on the waste container. By the above assembling work, each anchor bolt
When the upper end portion of 15 is supported at a predetermined position, then the foundation concrete is driven to a predetermined height selected as necessary in the assembled state. In addition, Stecon anchor
The main body 5 is constructed by, for example, burying a hole in the ground through the mounting hole of the base at the stage of assembling the anchor frame or at the stage of connecting the anchor bolt and the template to the anchor frame. Is not limited to the above work procedure, and the Stecon anchor itself is not limited to this.
In this case, the height of the anchor bolts 15, 15 can be adjusted by the insertion depth of the anchor bolt 15 into the fixing means 13, and the range thereof is, in the embodiment, from the height of the anchor frame 1 to the anchor frame 1. Anchor bolt to height 15
It can be performed in a wide range up to the height including the height of. Depending on the shape of the anchor bolt used and the structure of its fixing means, the vertical adjustment may be made only within a certain range of the entire length of the anchor bolt. In particular, if the height is known in advance, adjusting the lower end of the anchor bolt within a certain range will reduce the overlap with the vertical rod, and the anchor bolt used will also be short. Therefore, it is preferable. Further, in the above-mentioned examples, all are
In addition to the four anchor bolts 15 and 15 located at the corners of the girder 14, two anchor bolts 15 and 15 that are not fixed to the rods 7 and 7 are hung between the corners. However, it is possible to omit these depending on the usage conditions. As described above, according to the anchor bolt construction method of the present invention, a plurality of anchor bolts are arranged at predetermined intervals so as to match the bolt holes formed in the base plate or the like of the column base. When positioning and fixing the anchor bolts, compared to the conventional construction method that uses a large steel frame or the method that assembles the frame with the anchor bolts themselves, the work for positioning and fixing the anchor bolts is extremely easy. Moreover, since the weight is reduced by using the short anchor bolt, the workability is greatly improved. Furthermore, the anchor frame to be used is easy to transport and carry in, and it can be applied to a corner post. Also, while maintaining the effect of frame assembly with the anchor bolt itself, the anchor bolt can be fixed to the required height by changing the insertion depth of the anchor frame, and its height can be adjusted. Therefore, there are many advantages such that the number of types of anchor bolts can be reduced, mass production of a small number of types is possible, and construction material cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a construction state diagram showing an embodiment of the present invention. FIG. 2 is a front view of an anchor frame used in the present invention. FIG. 3 is a plan view of the base. FIG. 4 is an enlarged plan sectional view showing a fixed state of the base and the vertical rod. FIG. 5 is an enlarged plan sectional view showing a portion of anchor bolt fixing means. FIG. 6 is a cross-sectional plan view illustrating an arrangement of anchor bolts and a fixing state thereof. FIG. 7 is a front view of essential parts showing another embodiment of the anchor frame. FIG. 8 is a plan sectional view showing a mounting state of the base and the vertical rod. FIG. 9 is a plan sectional view showing the arrangement and fixing state of the fixing means and anchor bolts of the anchor frame. FIG. 10 is a construction state diagram showing a construction state in a conventional example. FIG. 11 is a perspective view showing an apparatus used in another conventional example. [Explanation of symbols] 1 Anchor frame 2 Base 3 Fixing bolt 5 Stecon anchor body 7 Vertical rod 11 Insertion hole 12 Push bolt 13 Anchor bolt fixing means 14 Template 15 Anchor bolt 16, 17 External screw 23 Ground

Claims (1)

(57) [Claims] An anchor frame, in which a plurality of vertical rods each having anchor bolt fixing means are erected at the corners of a frame-shaped base, is placed on the ground, while the prescribed frame of the template is placed. A plurality of anchor bolts are hung at the hole position, and the anchor bolts at the corresponding positions with the fixing means of the rod are fixed to the rod at the required vertical position via the fixing means, and in that state,
After aligning the template at a predetermined horizontal position, the base is fixed at a predetermined position on the ground by tightening the main body of the stercon anchor and the fastening body attached to the main body through the mounting hole provided in the base. Anchor bolt construction method.