Fixation method of lifting eye on concrete element obtained by method of casting into sliding form, and support for lifting eye

FIELD: construction.

SUBSTANCE: group of inventions relates to fixation of lifting eyes on a concrete element during its installation. A lifting eye is made of a metal rod and is at least partially located inside a cavity made in the concrete element surface. The above method involves transfer of at least the forces acting in longitudinal direction of the concrete element and applied to the lifting eye to the above concrete element by means of a support. A support is placed at least partially into the above cavity of the concrete element in which the lifting eye is located.

EFFECT: improving lifting eye fixation efficiency.

10 cl, 4 dwg

 

The technical field to which the invention relates.

The invention relates to the fastening of the mounting loop on the concrete element, such as a hollow or solid concrete slab obtained by the casting method in a sliding formwork, installation of the concrete element. In particular, the invention relates to a method for fastening a mounting loop at least during installation of the concrete elements, as well as to the support that is intended for use in conjunction with a mounting loop of the concrete element at least during installation of the concrete element.

The level of technology

Concrete elements during their manufacture are usually supplied with various mounting hinges, which are designed to introduce them hooks of a crane during installation of the concrete elements. These mounting tabs provide a faster, more convenient and more secure mounting of heavy concrete elements with a crane.

Mounting hinges for reinforced concrete slabs (in particular, hollow-core concrete slabs) obtained by the casting method in a sliding formwork, usually attached to the concrete slab after its receipt, but prior to hardening of concrete.

In the case of hollow-core concrete slabs installation mounting loops is performed by opening the upper surface sugandhapatta concrete slabs - or on the same line with emptiness, or in line with the wall between the cavities and the placement of the element forming the mounting loop, thus obtained deepening. To ensure secure mounting of the loop element, forming a mounting loop can be placed in such a way that it relies on creating the initial tension reinforcement hollow core slabs; for example, this is ensured by placing the end sections of the element, forming a mounting loop, under which creates the initial tension reinforcement of hollow core slabs.

Element forming a mounting loop, usually made of a metal rod by bending it in a suitable form; this form contains a portion forming a mounting loop, and the end portion designed to be placed inside the concrete and possibly under creating the initial tension reinforcement concrete slabs obtained by the casting method in a sliding formwork.

Mounting loop, in addition, is usually placed in the concrete slab obtained by the casting method in a sliding formwork, so that its highest point is essentially flush with the upper surface of this slab, and in the specified upper surface has a recess formed around the mounting tabs to allow the introduction of lifting hooks into the mounting loop. When mounting the loop is in such a recess is not necessary to remove it from the concrete slab after the installation of the last, as solid and smooth the top surface of concrete slabs easily obtained by filling the recesses accommodating the mounting loop, for example, mortar, or other suitable levelling compound.

In the case of hollow core slabs inside the depression, which received its upper surface during installation of the mounting loop and which surrounds the mounting loop, enter the Cup-shaped element (usually plastic) to prevent the occurrence of the alignment structure inside the cavities of hollow core slabs in the process of leveling the upper surface of this plate after its installation.

Mounting tabs to the present time was usually placed on the top surface of concrete slabs obtained by the casting method in a sliding formwork, so that in the region of each end of the concrete slab was installed two mounting tabs next to each other. In this case, the installation of concrete slabs was performed by means of the lifting boom to ensure the elimination of redundant obliquely acting forces applied to the mounting loops. Excessive obliquely acting forces can cause the element, the image of the store mounting loop changes its position in the concrete slab to be mounting that impairs binding and in the worst case leads to the separation of the mounting tabs from the concrete slabs during the operation of the installation and, consequently, to the destruction of reinforced concrete slabs subject to installation, and possibly injury of personnel working on the construction site.

Disclosure of inventions

According to the invention, inside the recess for mounting hinges, which are made in the concrete element, obtained by the casting method in a sliding formwork, near the mounting loop is entered bearing, which is used to secure this mounting tabs in the concrete element at least in the longitudinal direction of the latter. In the result, at least those forces which are directed in the longitudinal direction of the concrete element and attached to the mounting loop during installation of the concrete element, can be successfully transferred from the mounting tabs of the concrete element to be mounted. In this case, the installation of the concrete element can be performed without lifting the boom. This makes it easier and faster manipulation of concrete elements and placement of concrete elements during their installation, in particular on the construction site.

According to the invention, the mounting loop or element forming a mounting loop formed or: open the IAOD of a metal rod by bending it in a suitable form. These types of elements forming a mounting loop, known, for example, from the publications EP 1878854 and WO 2008/025894.

According to the invention, a support for mounting hinges, preferably made so that some of the forces that are deflected from the longitudinal direction of the concrete element and attached to the mounting loop in the operation of installation of the concrete element is passed to this pillar of the concrete element.

According to the invention, a support for mounting hinges, preferably made so that it is clamped in position when the lifting hook is inserted into the mounting tabs. Therefore, the lifting hook holds a support for mounting the loop is stationary during the operation of the installation, i.e. at a time when the force applied to the support, maximum. Due to this, during the operation of the installation can be prevented displacement of the support under the action of attached forces.

According to the invention, a support for mounting hinges, preferably, is a separate element that before the mounting operation of the concrete element is placed in the recess for mounting hinges concrete element in order to secure this mounting tabs and that after the operation the installation of the concrete element is removed from the recess. Thus, the support may preferably be administered as a component mounting equipment used by the CSOs in the installation of the concrete element; more precisely, the support is used in conjunction with a lifting hook, used in the operation of the installation.

Bearing according to the invention is particularly useful in the process of mounting the solid concrete slabs or hollow-core concrete slabs.

We offer support for mounting hinges concrete element contains a section abutting against the side wall of the recess for mounting hinges, made in the concrete element; and a section that connects the specified section, abutting against the side wall of the recess for mounting hinges, and the outer surface of the mounting tabs to pass from the mounting tabs of the concrete element at least forces acting in the longitudinal direction of the concrete element and attached to the mounting loop during installation.

Bearing according to the present invention contains, preferably, at the upper edge of the section, abutting against the side wall of the recess for mounting hinges, made in the concrete element) section rests on the upper surface of the concrete element, i.e. the section that rests on the surface surrounding the recess for mounting the hinges of the concrete element. This section rests on the upper surface of the concrete elements, enhances the pinning action supports and improves the stiffness of support.

Bearing according to the present invention, preferably, the designs are so that section, which connects the section abutting against the side wall of the recess for mounting hinges, and the outer surface of the mounting tabs has a length in the cross section which essentially corresponds to the diameter of the grooves for the mounting tabs of the concrete element, and has an opening width which essentially corresponds to the width of the mounting tabs. This opening also has a length, which may, preferably, be of the same length mounting tabs to be placed in the hole.

The characteristics of the proposed method is defined in paragraph 1 of the claims, and signs offer support defined in paragraph 7 of the claims.

Brief description of drawings

The following is a detailed description of the invention with reference to the drawings, which depict examples of its implementation:

figures 1A and 1B schematically show a support according to one variant of implementation, installed in conjunction with a mounting loop of the concrete element,

figures 2A and 2B schematically show a support according to alternative implementation that is installed together with mounting loop of the concrete element.

The implementation of the invention

Figures 1A and 1B schematically illustrate a support 1 according to the present invention installed in conjunction with a mounting loop 3 concrete element, to the which in this case is a hollow-core concrete slab 2. Figure 1A shows a support 1 in cross section, and figure 1B shows the support 1 at the top.

Bearing 1 consists of sections 4, abutting against the side wall of the recess for mounting hinges, made in hollow-core concrete slab 2, section 5, which connects the partition 4 and the outer surface of the mounting tabs 3 and section 6, rests on the upper surface of the hollow core slabs 2.

In the embodiment shown in figures 1A and 1B, section 4 support 1 is essentially cylindrical and is closed at its bottom by a partition 5 having a cut or hole where entered mounting loop 3, as shown in the figures, and at least in the longitudinal direction of the hollow core slabs pairing between the specified cut or hole and the mounting loop 3 is essentially dense. Section 6, which is attached to the upper edge of the section 4 support 1, which in this case is planteary ledge surrounding the upper edge of the section 4.

During installation of hollow core slabs 2 using mounting tabs 3 experiencing obliquely acting force, whose direction is shown by an arrow in figure 1A. In this case, the mounting loop 3 is based on section 5 of the support 1, and section 5 transmits the force to the wall cavities of hollow core slabs 2 through section 4 Therefore, COSO operating force applied to the mounting loop 3 when the installation of hollow core slabs 2, is not able to bend the entire element, forming a mounting loop as part of the mounting tabs on the outside supports, takes only essentially obliquely vertical component of the applied force. Because of this hollow-core concrete slab, provided with supports according to the present invention can be mounted without the use of the lifting boom.

Support 1, preferably made of metal, such as sheet steel, and preferably is a component mounting equipment, made with the possibility of mounting the loop 3. In other words, the support 1, preferably, is not part of mounting tabs attached to the hollow-core concrete slab 2.

In relation to option implementation, shown in figures 1A and 1B, it should be noted that section 4 does not necessarily have to go to the bottom of the recess, and section 5, which connects the loop 3 and section 4, does not have to be located at a bottom of the recess. According to the present invention, the only requirement is the following: distance from section 5 to the upper part of the mounting tabs 3 should be such that the lifting hook to be put in place the structure in the mounting loop could be properly inserted into the mounting tabs 3. Thus, the lifting hook clamps the support 1 in the desired position and prevents its withdrawal from the deepening of the hollow core slab under the action of forces applied to this support during the operation of the installation.

Figures 2A and 2B schematically illustrate alternative bearing 11 according to the present invention installed in conjunction with a mounting loop 13 of the concrete element, which in this case is a hollow-core concrete slab 12. Figure 2A shows the support 11 in cross section, and figure 2B shows the support 11 at the top.

In this embodiment, base 11 consists of sections 14, rests only in the side wall of the recess for mounting hinges, made in hollow-core concrete slab 12, section 15, which connects the partition 14 and the outer surface of the mounting tabs 13 and section 16, rests on the upper surface of the hollow core slabs 12 along the length of the section 14.

Designed bearing 11 supports mounting loop 13 in the operation of installation of hollow core slabs 12, preferably, for example, only in the longitudinal direction of the hollow core slabs, which sections 14 and 16 are oriented in the direction of the center in the longitudinal direction INR is apostates concrete slab. Components of forces acting essentially in other directions and attached to the mounting loop 11 during the operation of the installation of hollow core slabs 12 are the connecting strap 11.

Compared with the embodiment shown in figures 1A and 1B, an implementation option, shown in figures 2A and 2B, has a "truncated" design, which reduces production costs and costs of material, but sufficient to support the mounting tabs in the direction of the most dangerous bending forces.

For the person skilled in the art it is obvious that in the examples described above may be added a number of modifications and changes without departing from the scope of the invention. Therefore, the above examples do not limit the invention, and the scope of protection of the latter being defined only by the attached claims.

1. The method of fastening mounting tabs (3, 13) on the concrete element (2, 12) obtained by the casting method in a sliding formwork, at least during installation of the specified concrete element is performed using the mounting tabs and mounting loop is formed from a metal rod and at least partially located within the depressions made in the surface of the concrete member, in a specified way to ensure transmission of the at IU the e forces acting in the longitudinal direction of the concrete element and attached to the mounting loop, specified concrete element by means of a support (1, 11), which is placed at least partially in the specified deepening of the concrete element, which is mounting a loop.

2. The method according to p. 1, characterized in that also transmit forces that are deflected from the longitudinal direction of the concrete element and attached to the mounting loop (3) through the support (1) the specified concrete element (2).

3. The method according to p. 1, characterized in that the support (1, 11) is a separate element that before installation of the concrete elements placed together with the specified deepening of the concrete element (2, 12) and a mounting loop (3, 13) located in the recess, and which after Assembly is removed from the concrete element.

4. The method according to p. 1, characterized in that the support (1, 11) establish together with a lifting hook, join with a mounting loop (3, 13).

5. The method according to p. 1, characterized in that the support (1, 11) is clamped in a predetermined position by placing the lifting hook in the mounting loop (3, 13) secured to this support.

6. The method according to one of paragraphs.1-5, characterized in that the concrete element, obtained by the casting method in a sliding formwork, is a solid concrete slab or hollow, Zhelezobeton the reduction plate (2, 12).

7. Bearing (1, 11) for mounting hinges (3, 13), formed from a metal rod and located in a concrete element (2, 12) obtained by the casting method in a sliding formwork, contains the partition (4, 14), rests on the side wall of the recess for mounting hinges, made in the concrete element, and the section (5, 15) connecting the specified partition (4, 14), rests on the side wall of the recess for mounting hinges, and the outer surface of the mounting tabs to pass from the mounting tabs of the concrete element at least forces that are applied to the mounting loop during installation of the concrete element and directed in the longitudinal direction of the concrete element.

8. Reliance on p. 7, characterized in that it contains at the upper end of the specified partition (4, 14), rests on the side wall of the recess for mounting hinges, section (6, 16), rests on the upper surface of the concrete element (2, 12).

9. Reliance on p. 7, characterized in that it is made with possibility of installation in conjunction with a lifting hook is used during installation of the concrete element (2, 12).

10. Bearing in one of the paragraphs.7-9, characterized in that the section (5, 15), which connects the partition (4, 14), rests on the side wall of the recess for mounting hinges, and the outer surface of the mounting tabs (3, 13), has such a length of the cross section, which is essentially suitable for the t to the diameter specified deepening of the concrete element, and has an opening width which essentially corresponds to the width of the mounting tabs.



 

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