JPS59179937A - Placement of anchor bolt - Google Patents

Abstract

PURPOSE:To obtain a foundation without the need to correct the top end by a method in which a horizontal part is welded to the upper end of a vertical part driven into an excavated trench, and a base plate having an anchor frame and an anchor bolt is set on the horizontal part, centered, and welded. CONSTITUTION:A trench 1 is excavated in a place where a foundation is to be constructed, a vertical part 2 consisting of steel angles is vertically driven into the trench 1, and a horizontal support part 3 is horizontally fixed to the upper end of the vertical part 2. Leveling concrete 14 is then placed on broken stones 15, and the anchor frame 5 of a base plate 7 with an anchor bolt, whose height is regulated in advance, is placed on the horizontal support part 3. The center of the base plate 7 is matched with the center of the foundation by sliding the anchor frame 5 in every direction, and the anchor frame 5 is welded to the horizontal part 3. The base plate 7 can thus be exactly set at the center of the foundation to eliminate the need to correct the top end.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anchor bolt construction method aimed at accurately and quickly installing anchor bolts in steel frame construction work. - In the past, it was difficult to accurately install anchor bolts in steel frame construction work, so it was naturally necessary to correct the anchor bolts after concrete IJ was cast. is also included. However, the method of repair involves heating the threaded crotch of the anchor bolt with a gas burner, bending it to make the upper end vertical, and adjusting it to the correct position, which significantly reduces the strength of the anchor bolt. Although it is structurally undesirable, there is no other suitable construction method, so it is commonly used in the industry.

Therefore, in current steel construction construction, in order to increase the amount of exposed anchor bolts, concrete is poured below the required height and an inverted conical void is created around the anchor bolts.

Anchor bolt there? Heat it to red with a gas burner, correct the bending to a predetermined position, and then form it vertically.Then, fill the hole with the inverted cone-shaped mortar, place a mortar layer of the required thickness on the concrete, and install the anchor bolt. Construction of the foundation concrete has been completed. 01
J-ki is known as dai-ori and ota-naoshi, and was carried out as a common practice at each construction site.

However, according to this invention, the anchor frame is fixed to the anchor frame, and the anchor frame is made to be able to slide horizontally in front, back, left and right on the horizontal support material fixed to the dumped concrete. If the set position is accurately determined by measuring with a meter and fixed by welding to the horizontal support member, the anchor bolt will be accurately and firmly fixed in the fixed position, and there will be no risk of it moving during concrete pouring, thus eliminating the need for modification. , the above-mentioned conventional problems are completely fixed. In addition, it is fixed to the anchor frame and the base grate is fixed to the munian anchor bolt, and there is no need to repair the top of the concrete 1.
Since there is no need to provide a mortar layer 7 on the top surface, it is possible to erect the steel frame quickly after the concrete has hardened, and it has remarkable characteristics such as the labor and time required for fixing the anchor bolts as well as the construction period can be significantly reduced. .

That is, embodiments of the present invention will be described as follows based on the accompanying drawings.

A trench of a specified width is dug in the area where the foundation is to be constructed, and a vertical support made of steel angles is installed at the location of the anchor bolt in the trench.
is driven vertically, and the horizontal support member 3.3 is fixed horizontally to the upper end surface of the vertical support member 2, λ, with the upper surface aligned with the V. Next, pour concrete 1, 1- ) / 4 kegwari chestnut / on top of S (~
, the support material is firmly fixed.

The anchor frame F is then floated onto the horizontal support member 3.3. The anchor frame has one horizontal leg rod, one anchor pole 11 at a predetermined interval toward the upper left, the lower bent part of the anchor bolt A is in contact with the bent part of the lower end of the anchor bolt A, and the anchor bolt A is vertically fixed by welding. , the holes provided at the four corners of the base plate 7 are fitted into the upper end of the base plate 7, and the base plate 7 is supported horizontally (or fixed by welding in a horizontal state). In this case, the height of the base plate 7 is determined so that the top surface of the pace plate is flush with the top surface of the concrete to be poured. In the figure, 70 is an auxiliary rod for fixing the anchor bolt and the leg rod. In the above, once the anchor frame is placed on the horizontal support, it is surveyed using a transit or other surveying instrument,
After aligning the center 0 of the base plate 7 with the intersection of the electrician center lines
．． 3 and the welding is fixed. In this way, the anchor bolt B is firmly identified into the ground through the vertical support member, and when concrete I-5' is poured, the concrete 9
Even if it comes into contact with anchor frame q, etc., anchor pol)
There is no risk that the position of 4 will shift. Therefore, the top surface of base plate 7 should be flush with the top surface (concrete) 9 M) Since the height of base plate 7 is fixed, the amount of concrete 90 to be poured should be regulated based on the base plate during construction. In the figure, // indicates a vertical support member β, an auxiliary rod fixed to the vertical support member β, and 7.
2 is the formwork, /3 is the steel frame.

In the above, after the concrete has hardened, the grate 76 at the lower end of the steel frame/3 is superimposed on the base plate and is tightened with a nut screwed into the anchor bolt, so that the vertical support, anchor frame, and steel frame are solidly made of metal. are combined to form a continuum.

In the above embodiment, the vertical support member 3 and the horizontal support member 3 are welded together on site. It is also possible to install it and pour concrete 1-/g. Also, the number of anchors used for /I/l- is limited to this number (of course, the number can be set as necessary).

That is, according to this invention, the center position of the anchor frame is determined while moving back and forth and left and right on the horizontal support material, so the center position can be set accurately. If the position is fixed, the anchor bolt can be installed firmly and accurately. Therefore, there is no need to modify the anchor pole L-Y after the concrete has hardened, and there is no need to raise the platform or repair the large end, which were previously considered essential work, so labor and time can be significantly reduced, and the anchor This has the effect of significantly improving the workability of bolt installation. Additionally, since the crown does not need to be re-aligned, the steel frame can be erected immediately after the concrete has hardened, which has the effect of shortening the construction period.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the anchor frame and support member used to carry out the present invention, and Fig. 2 is the same (installed state 1, partial partial view). / Groove 2... Vertical support member 3...Horizontal support member...Anchor frame B...Anchor bolt 7...Base plate Patent applicant Kubo 1) Representative Masaru Suzuki Writ of amendment to the next procedure (voluntary) Commissioner of the Japan Patent Office Young Kazuo Sugi, 31, Indication of the case 1932, Patent Application No. 367 No. 3, Relationship with the person making the amendment Case Patent applicant 4, Agent (Postal code 160) Address: Tokuaki, 29 Shinanomachi, Shinjuku-ku, Tokyo Bill 5, Date of Amendment Order Claims / After fixing the horizontal support member on cast concrete at a predetermined height, an anchor frame plate of a base plate with anchor bolts whose height is regulated in advance is attached onto the horizontal support member. The anchor bolt is installed, and the anchor frame is slid from front to back and left to right to align with the middle of the base plate and the center line of the workpiece, and then the anchor frame and the horizontal support are welded. JMI 7 Contents of the amendment (1) The scope of the claims is as attached in the attached document. (2) On page 3, line 70 of the description, the words ``accurately and'' are corrected. (3) Delete the statement "The above-mentioned perpendicular...fixes" in lines S to 7 of the specification page. (G) Details @ Line 3 on the left page [J is corrected to ``Survey and base'' to ``Survey 2 and base by slightly moving the anchor frame horizontally.'' ” is correct by saying ``construction.'' (5) Does the specification say “certain π” on the first line of page 4? Correct it to ``certainly and quickly.'' (I-) On page G of the specification, line g, ``Place and fix.'' is corrected as follows. A horizontal line of a predetermined height is drawn on the side of the vertical support member 3, and the water support member 3 is aligned accurately with the horizontal line.
．． Weld 3. iSJ horizontal support material 31, ? The protrusion of the more protruding vertical support member -1λ is cut 1° to match the upper surface of the horizontal support member. Furthermore, since the frame anchor curve is pre-fabricated in a factory and has high dimensional accuracy, there is no need to modify the height. List of attached documents

Claims (1)

[Scope of Claims] / After fixing the horizontal support material at a predetermined height on the cast concrete, the height is regulated in advance and the anchor frame of the base plate is placed on the horizontal support material with one anchor bolt. , After sliding the anchor frame front, rear, left and right (two times to align the center of the base plate with the construction center line),
Welding the anchor frame and horizontal support material 5 (p.
How to apply an anchor bolt (a) How to adjust the height of the base brake (anchor bolt)? It is characterized by screwing together and screwing together 1.
, 2 Anchor bolt construction method according to claim 1