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1. WO2020167268 - APPAREIL DE RENFORT D'ANCRAGE POLYVALENT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

MULTI-PURPOSE ANCHOR REINFORCEMENT APPARATUS

Related Technical Field of the Invention:

The present invention relates to a multi-purpose anchor reinforcement apparatus developed to prevent anchor rope from being released from the concrete mass and to ensure that it is kept in the center along the well.

The present invention relates to anchor reinforcement apparatus that ensures to center the anchor rope in both root area and free area, to provide built-in behavior of the rope against releasing at the critical points by means of an increase in frictional resistance between the anchor rope and root injection and that also supports an increase in the frictional resistance between the root injection and environmental ground.

State of the Art

The increase in the number of multi-story buildings, bridges and dams day by day necessitates the construction of said buildings on the problematic grounds. Along with said requirement, anchors are often preferred so as to solve problems such as carrying capacity and deformation in the geotechnical designs on weak grounds. Anchors are support elements employed to locate the building safely during construction and also used in boring deep wells and in supporting higher retaining walls. Briefly, anchor is a constructional part that transmits the tensile force applied thereon to the carrying ground.

In particular, anchors are used in slope stabilization, excavation support works and deep excavations in Geotechnical Engineering being a sub-sector of Constructional Engineering.

A sufficient number of anchor ropes is driven down to the bottom of the well after boring anchor wells with a vertical or horizontal angle for the anchor application process and it is expected that the well gains endurance through injection. In this technique, adherence between root area concrete and steel ropes are met only by the rope surface. Considering that anchor ropes in diameter of 12.0 - 15.0 mm are used in applications, it is of a crucial importance to elongate significantly the length of the rope and thus the length of the well so as to counterbalance the tensile stresses. Analogously, since there is no element for increasing the frictional resistance between the root area and environmental ground, the composite structure in the root area may be subjected to excessive displacements.

It is necessary to provide some conditions so as to achieve theoretical anchor calculations in the field applications. Some of those conditions are that the anchor rope is attached to the ground by means of the root area, that the rope is in the center, that load of the rope is tested and the anchor may be re tensioned if needed. However, as the anchor applications increase, there occurs some problems resulting in from mistakes in said conditions.

After preliminary research conducted in the state of the art, the patent document numbered "CN205822202 " has been examined. The invention subjected to the application discloses a heterotypic centering support with a conical shape developed for the use of 3 to 6 multiple ropes pertaining to the anchor field.

After preliminary research conducted in the state of the art, the patent document numbered "CN205243501 " has been examined. The invention subjected to the application discloses an anchor rope inclinometer centering device. The invention is used to increase the measurement accuracy in the anchor rope hole.

After preliminary research conducted in the state of the art, the patent document numbered "CN102937028" has been examined. The invention subjected to the application discloses a base plate developed so as to apply an injection plug and also centering element on the free area of the anchor ropes in coal mines.

Increasing capacities of shoring systems by means of the use of anchor elements employed in the state of the art is one of the most preferred methods in current applications.

Collapse modes such as deviation of the anchors in the state of the art from the well diameter, release of the rope from concrete and complete release of the concrete mass from the environmental ground are the most frequent cases in the anchor systems. Problems in the anchors such as faulty workmanship, material defects and releases are the prominent shortcomings resulting in collapses. Both the axial tension force may not affect in the desired direction and the material defects may occur during injection due to the centrifugation of the anchor rope while being positioned in the well. Therefore, problems may occur on the anchor before the project reaches up to its load capacity. Hence, the centering process is one of the crucial factors in the anchor applications. On the other hand, it is required to increase the interactions space between the injection - rope and injections - and ground so as to avoid collapse modes resulting from the cases such as release of the rope from injections or complete release of the root area from the ground.

As a result, due to the aforementioned drawbacks and insufficiency of the existing solutions regarding the subject matter, the need for a development in the related technical field has arisen.

Obj ects of the Invention :

The most important object of the present invention is to solve the release problem resulting in from the failure between concrete - steel rope and concrete - and environmental ground on the anchor root area and also to ensure the centering of the rope. Thus, collapse cases would be minimized, which result from the incidents such as release of the rope from inside concrete in lower loads before the anchor does not reach up to its tension capacity and the full movement of the root area.

Another object of the present invention is to provide extra frictional resistance by increasing the interaction areas of the ground, injection and rope elements by means of wings thereon.

Another object of the present invention is to ensure that the equipment is not released from the concrete in the tension piles functioning against the tensile forces.

Yet another object of the present invention is to reduce the displacement amount of the composite structure in the root area in case the wings are not wide enough in the occasion of interacting with the environmental ground.

Yet another object of the present invention is that it can be used in both the root area and free area.

Yet another object of the present invention is that it comprises a simple and useful design.

Yet another object of the present invention is to reduce the number of anchors by means of an increase in the capacity and to shorten the anchor length.

Yet another object of the present invention is to increase the number of wings and to use apparatus in desired numbers for each well .

The structural and characteristic features and all the advantages of the present invention will be understood more clearly by means of following figures and the detailed description written with references to these figures. Therefore, assessment should be done by taking these figures and detailed description into consideration.

Description of the Figures :

FIGURE 1 illustrates a perspective view of the inventive apparatus .

FIGURE 2 illustrates a top view of the inventive apparatus.

FIGURE 3 illustrates a front view of the inventive apparatus.

Reference Numbers:

100. Anchor Reinforcement Apparatus

110. Main Body

111. Vertical slits

120. Fixed wings

130. Centering Profile

140. Anchor Head

Description of the Invention:

The inventive anchor reinforcement apparatus (100) is comprised of a main body (110) , fixed wings (120) , centering profile (130) , anchor head (140) and anchor grip.

The main body (110) element made from a round profile is formed in a diameter such that it may be fitted into the well. There are symmetrically positioned vertical slits (111) defining the locations, in which fixed wings (120) are to be fastened on the main body (110) . Fixed wings (120) which are formed of plane metal plates, are the main element that increases the friction surface. It is fastened to one side of the vertical slits (111) and it is also ensured that the injection concrete flows out from the remaining space. The centering profile (130) welded to the upper portion of the main body (110) and comprising holes as much as the number of anchor ropes ensures that the anchor reinforcement apparatus (100) is in the same direction as the rope. There is an anchor head (140) comprising holes as much as the number of ropes in the lower portion of the main body (110) . It is ensured by using anchor grips at the lower portion that the anchor reinforcement apparatus (100) is fixed at a desired portion on the rope.

Fixed wings (120) increase the interaction areas of injection and rope elements and provide an extra frictional resistance. Furthermore, it is ensured to reduce the displacement amount of the composite structure in the root area in case the fixed wings (120) are not wide enough in the occasion of interacting with the environmental ground.

The inventive anchor reinforcement apparatus (100) was used in the application of a real-scale example field. In this example, the anchor reinforcement apparatus (100) was completely formed of steel and the components are welded together so as to ensure the highest strength. During the manufacturing process, a metal pipe having a diameter of 90.0 mm, a length of 200.0 mm and a wall thickness of 3.0 mm was used as main body (110) . A single anchor head (140) having a thickness of 30.0 mm was fastened to its lower portion so as to affix the anchor reinforcement apparatus (100) to the anchor rope. On the upper portion, there is a centering profile (130) with holes that are positioned to ensure that the rope goes through the center. The rectangular sheet metals were cut in the sizes of 5.0 mm x 50.0 mm x 150.0 mm and thus, fixed wings (120) were formed and were welded to the slits opening in four main directions such that they were tangent to the interior surface of the cylinder. Vertical slits (111) were formed in a thickness of 8.0 mm, wherein the gap of 3.0 mm remaining after the fixing of wings of 5.0 mm, were fixed to one side in order to ensure that the injection material may flow smoothly and fill up the well. These exemplary sizes were designed for a borer having a diameter range of (180.0 - 220.0 mm) which is commonly used in the field application. The manufacturing processes in desired sizes may be provided as a result of a change of the borer diameter. Sizes of the fixed wings (120) may be changed and the number thereof may be increased. In the exemplary design, a single anchor rope was used again. Ropes in desired numbers may be inserted by means of increasing the number of anchor heads (140) and holes on the upper centering profile (130) . A proper number of anchor reinforcement apparatus (100) may be positioned at the same root area if it is desired to increase the anchor tension capacity. As a result of the exemplary field application, compared to the anchor without an anchor reinforcement apparatus (100), an increase of 38.0% and 90% in the tension capacity, respectively, is observed in anchors with a single anchor reinforcement apparatus (100) and two anchor reinforcement apparatuses (100) .

The inventive anchor reinforcement apparatus (100) is used for three main objects which are ensuring to center the anchor rope in both root area and free area, providing built-in behavior of the rope against releasing at the critical points by means of an increase in frictional resistance between the anchor rope and root injection, and increasing the frictional resistance between the root injection and environmental ground.