JPS60102427A - Fixation of structure - Google Patents

Abstract

PURPOSE:To uniformly pack cement mortar into the downside of a washer without any aperture as well as shorten the period of operations by providing a vertical through hole and a side through hole passing from the inner wall of the vertical through hole to the upside of a cross beam in the cross beam as the base of a structure. CONSTITUTION:A cross beam 2 as the base of a structure is inserted into an anchor bolt 8 buried in the concrete foundation 7, and a washer 16 is fitted on the bolt 8 and clamped with a nut 17. Cement mortar is charged by a charging gun into the side through hole 10 passing the inner wall of a vertical through hole 9 provided in the cross beam 2 and packed into the whole spaces of the through hole 9 and the side through hole 10. The cement mortar is hardened to strongly fix the cross beam 2 to the anchor bolt 8 of the concrete foundation 7.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for fixing structures made of reinforced concrete or t'i steel.

Structures made of reinforced concrete or Fi steel are generally fixed to anchor bolts buried in the foundation concrete. For example, when expanding the width of a road and installing a built-in sidewalk that extends from the road shoulder, one end of the cross beam made of reinforced concrete is fixed to an anchor bolt in the foundation concrete of the road shoulder.

Also, when dismantling railway power transmission structures, signals, and bridges, the steel column bases are fixed to anchor bolts.

Conventionally, as a method of fixing this type of structure, the cross beams of the structure,
A base such as a column base (provide a through hole larger than the diameter of the anchor bolt, lift the structure with a crane truck, and connect the through hole in the base to the foundation concrete! Push through the J + 1- anchor bolt,
Push a washer through this 7, tighten it with a nut, and accurately adjust the direction, height, level, etc. of the structure in advance, and then install shoring, turnbuckles, etc. to prevent the structure from moving. The nut and washer are removed, mortar or grout is injected into the gap between the through hole in the base and the anchor bolt, the washer is pushed through again, and the nut is fully tightened to secure the anchor.

However, with such conventional fixing methods, it is necessary to remove the nuts and bolts that have been temporarily tightened by pushing them through the anchor bolts again, and then pushing them through again for final tightening, making the fixing work cumbersome and time consuming. Injecting mortar or graft with the washer and nut removed is not only dangerous as it may cause the structure to move unexpectedly, but also cause the mortar or graft to be removed from the washer. It was difficult to completely match the lower surface, and there was a drawback that uniform fixing strength could not be obtained.

Therefore, the present inventor attempted to devise a method for fixing a structure that is efficient, does not require much effort, is less dangerous, and provides uniform strength. As a result, the present invention was completed.

That is, the method for fixing a structure of the present invention includes: (e) providing a vertical through hole in the base of the structure made of reinforced concrete or steel and a side hole opening from the inner wall surface of the through hole to the upper surface of the base; By pushing a through hole in the base body through an anchor bolt buried in the foundation concrete, then pushing a washer through the anchor bolt and tightening it with a nut, and then injecting mortar or graft into the through hole from the side through hole. , side holes and through holes'! It is characterized by filling the two gaps with mortar or graft.

Hereinafter, the method of the present invention will be explained in detail with reference to the implementation schedule of the drawings.

FIG. 1 shows an example in which the wooden method is used when constructing a prefabricated walkway on the shoulder of a road. In Figure 1,
1 is an existing roadway, and an assembled walkway A will be constructed extending from the shoulder of this roadway.

The assembled walkway A is mainly composed of cross beams 27 which are structures made of reinforced concrete, pillars 3 made of reinforced concrete that support the ends of the cross beams 2, and large plexigraph reinforced concrete plates 4 which are swallowed up between the cross beams 2. has been done. What? , 5#'i is a boundary fence between the roadway and the assembled walkway, and 6 is a protective fence for the assembled walkway.

When constructing an assembled walkway, first, one end of the cross beam 2, which is the base of the structure, is fixed to an anchor bolt 8 buried in foundation concrete 7 cast on the road shoulder. As shown in FIG. 2 of L1 at one end of the cross beam 2, a side hole 10 is provided that connects the vertical through hole 9 and the inner wall surface of the a through hole 9 to the upper surface of the cross beam base body 2. This through hole 9 and side hole 10
is formed by placing an iron pipe 11 having a through hole 9 and a side hole 10 into mortar when manufacturing a reinforced concrete cross beam base 2 in advance. Note that a side hole 10 is formed beside the upper end of the through hole 9, and a small hole for overflowing air and mortar that opens to the upper surface of the horizontal beam base 2 is provided on the upper wall surface of the horizontal portion of the side hole 10. Good too. Moreover, other metal pipes or synthetic resin pipes can be used as the iron pipe 11. Note that instead of the reinforced concrete O cross beam base 20, it is also possible to use a cross beam base made of steel whose surface is coated with anti-rust paint.

The cross-beam base body 2 is lifted up by a crane truck by hooking a wire to a hook attached to the cross-beam base body 2.

Thereafter, in the lifted state, the upper part of the column 3 having a spherical upper part is fitted into a through hole provided at the fcl end of the cross beam base body 2 and having a spherical lower face. At this time, the U-shaped connecting fitting 12 protruding from the tip of the upper spherical surface of the support column 3 is pushed into the through hole of the cross beam base whose lower surface is spherical, and the connecting metal fitting 12 protruding toward the upper surface of the cross beam base 2 is pushed into the through hole of the cross beam base whose lower surface is spherical. A bar rod is inserted to connect the support 3 to the cross beam base 2. The upper part of the cross beam base is supported by fitting the spherical surface of the other end of the cross beam base with the spherical surface of the upper part of the column, which is a highly stable support method. It is also possible to adopt a supporting method such as providing a bracket and bolting the support to this.

In the recording with the strut 3 suspended on the cross beam base 2, the cross beam base 2 was lifted and moved by a crane truck, and the through hole 9, which was used at one end of the cross beam base 2, was removed. θ concrete 7
Push it through the anchor bolt 8.

In addition, a jack base 13 is attached to the lower end of the pillar 3,
This jack base 13 is brought into contact with the flat surface of the foundation concrete 14 cast on the road shoulder slope, the wire of the crane vehicle is loosened, and the jack base 13 and turnbuckle 15 are adjusted so that the direction of the cross beam 2 and the support column 3 is adjusted. Accurately determine the height, level, etc. The gap between the through-hole 9 of the cross-beam base 2 and the anchor bolt 8 is made thick enough to allow the cross-beam base 2 to move and adjust its position when adjusting the accurate position of the cross-beam base 2 and the pillar 3. ing.

After the cross-beam base 2 and the support column 3 have been properly positioned, the washer 16 is pushed through the anchor bolt 8 and tightly tightened with the bolt 17, as shown in FIG. The washer 16 serves to evenly transmit the force acting on the cross-beam base to the anchor bolt, and also serves to securely R-fit the nut, and although it can sufficiently cover the through hole 9, it does not invade the side hole 10. It is better to be as busy as possible so that there are no problems. In this way, the cross beam base body 2 is securely held on the anchor bolts 8. In this state, mortar or graft is injected through the opening of the side hole 10 of the cross beam base body 2 using an injection gun.

The injected mortar or graft fills the entire voids of the through hole 9 and the side hole IO and hardens.

It is preferable that the mortar or graft is filled in not only the gaps between the through holes 9 and the side holes 10 but also the four parts 18 of the fastening part to prevent the anchor bolts and nuts from rusting. Moreover, when pouring mortar or graft, if the periphery is vibrated with a rod-shaped or surface pie-break to compact the mortar or graft, voids can be completely eliminated. In this way, the cross beam base 2 is firmly fixed to the anchor bolts 8 of the foundation concrete 7. Note that the lower end of the support column 3 is fixed with concrete 19. In addition, there are 4 reinforced concrete plates between the cross beam base 2! The pavement is laid and the joints are filled to form an assembled walkway.

On the upper side, the horizontal beam base of the assembled walkway made of reinforced concrete was used as the base of the structure, and the method of fixing it was explained.
It can also be used to fix the thick inner base of steel column bases for traffic lights, bridges, etc. Cutting is generally used to provide through holes and side holes in a column base made of steel.

As described above, according to the method of the present invention, when an anchor bolt of the foundation concrete is pushed through a through hole provided in the vertical direction of the base of a structure and fixed by tightening with a washer and a nut, A side hole was created from the inner wall surface to the upper surface of the base, and mortar or graft was injected from this side hole into the through hole, so after accurately positioning the structure, it was tightly tightened with washers and nuts. condition i -C, I side hole, as well as the hole between the through hole and the anchor bolt +a +?
: Can be filled with moi lettuce or graft 75;

Therefore, when positioning the structure, compared to the conventional method in which the temporarily tightened washers and pads are removed and mortar or graft is poured into the shell hole, the time required is shortened.
Furthermore, there is no risk of accidental movement of a heavy structure during injection work, resulting in anchor bolt tension or loosening. In addition, the injected mortar or graft is uniformly filled with no gaps on the lower surface of the washer due to the injection pressure, and the force acting on the base of the structure is evenly transmitted to the sitting position and anchorage, making it strong and even. Provides strong fixing strength.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a part of the zero-start method, and FIG. 2 is a partially cutaway sectional view showing an enlarged main part of the final completion 91 method shown in FIG. A...Assembled walkway, 2...Horizontal beam base, 3... Support column,
7...Foundation concrete, 8...Anchor bolt,
9-... through hole, 10... side hole, 16... washer,
17...Natsuto.

Claims (1)

[Claims] (1) The base of a structure made of reinforced concrete or mineral steel is provided with a vertical through hole and a side hole extending from the inner wall of the through hole to the top of the base, and the through hole of the base is inserted into the foundation concrete. I! By pushing through the thrown anchor bolt, then pushing a washer through the anchor bolt and tightening it with a nut, and then injecting mortar or grout from the side passage hole into the through hole, the gap between the side passage hole and the through hole is filled. A method for fixing a structure, characterized by filling the structure with mortar or grout.