CN211523202U - Anchoring element arrangement in ground and ground anchoring element - Google Patents

Abstract

The invention relates to an anchor assembly in the ground and a ground anchor for such an anchor assembly, having an elongated traction element which is introduced into a borehole in the ground, wherein an anchor body is connected with the traction element at a ground-side anchoring section, the traction element comprising at least one ground-side first partial traction element and a rear-side second partial traction element, the first partial traction element being releasably connected with the second partial traction element by means of a connecting device. The connection device includes: a first coupling element coupled to the first portion of the traction element; and a second connection element connected with a second partial traction element, and the first connection element and the second connection element are releasably connected with each other via a thread.

Description

Anchoring element arrangement in ground and ground anchoring element

Technical Field

The invention relates to an anchor assembly in the ground with a ground anchor having an elongated traction element which is introduced into a borehole in the ground, wherein an anchor body is connected with the traction element at a ground-side anchoring section, the body having a larger outer diameter than the traction element, and the traction element comprises a non-metallic material, wherein the traction element comprises at least one ground-side first partial traction element and a rear-side second partial traction element, wherein the ground-side first partial traction element comprises a non-metallic fiber material, and wherein the first partial traction element is releasably connected with the second partial traction element by means of a connecting device.

The invention also relates to a ground anchor for such an anchor assembly, having an elongated traction element to which an anchor body is firmly connectable on a ground-side anchoring section, wherein the traction element comprises a non-metallic material, wherein the traction element comprises at least one ground-side first traction element and a rear-side second traction element, wherein the ground-side first traction element comprises a non-metallic fiber material, and wherein the first traction element is releasably connectable with the second traction element by means of a connecting device.

Background

Anchor devices with ground anchors (ground anchors) are used, for example, in the rear anchorage of construction pit walls in the ground on site. By means of said anchor device, the pressure acting on the walls of the construction pit can thus be dissipated into the ground at the rear.

To construct the anchor assembly, a bore hole is first formed through the support wall of the construction pit into the ground at the rear. The bore hole may have a length of up to 10 m and more. A drill anchor having an elongate pulling element, typically comprising a steel material, is introduced into the borehole. An anchoring body is formed on the ground-side anchoring section of the traction element by introducing a condensable mass in the ground, said body being firmly connected to the traction element and the ground after condensation. After curing of the anchor body, the clamping member can be attached, in particular can be screwed, onto the free head element of the ground anchor. The clamping element is located on the construction pit supporting wall and can thus guide the applied pressure into the ground at the rear via the traction element.

In certain situations, such as where a construction pit is closed, it is desirable to remove the ground anchor. This removal may be required for environmental reasons, in particular in ground anchors made of rusted steel material. Metal elements may also constitute undesirable obstacles in surrounding property (surrounding property) which, for example, may significantly impede construction work on such property.

At least partially detachable ground anchors are known from the prior art. Thus, the traction element of the ground anchor may be provided with a mechanical separator element, for example with a threaded section.

From EP 0583725 a1 a ground anchor is known with a traction element which is formed at least in several areas from a specific ferromagnetic material. Via the electrical heating means, the pulling element can be heated in a certain section above the curie temperature of the steel material, so that the strength of the pulling element is reduced in the separator section. Upon application of a corresponding traction release force, the traction element is detached in the separator section. The detached part of the traction element can thus be removed from the ground.

In such ground anchors, the metal part remains in the ground at all times due to the method. In addition, ground anchors of this kind require the use of special steel, which is costly to produce.

A common ground anchor, also known as a tie-back anchor (tieback anchor), is described in AT 514992B 1. In this tie-back anchor, rear-side and air-side clamping and pulling elements as well as ground-side anchoring and pulling elements made of non-metallic fiber material are arranged. The two traction members are connected to each other via a common connecting sleeve. Here, the two traction members may be arranged overlapping in the sleeve at least in several regions, wherein a void in the sleeve is potted with an adhesive material. Alternatively, provision is made for a threaded sleeve to be provided on the connecting sleeve, wherein the clamping and pulling element is screwed directly into said threaded sleeve.

SUMMERY OF THE UTILITY MODEL

The object of the invention is to specify an anchor assembly and a ground anchor which have a simple construction and can be employed particularly flexibly.

According to the utility model discloses, the purpose is realized through anchor assembly and with the help of ground anchor assembly. Preferred embodiments are specified in other aspects.

According to the utility model discloses an anchor assembly's characterized in that connecting device includes: a first coupling element coupled to the first portion of the traction element; and a second connection element connected with a second partial traction element, and characterized in that the first connection element and the second connection element are releasably connected to each other via a thread.

The basic idea of the present invention can be seen from the following: the anchoring element is configured at least in two parts (configured from a ground-side first partial traction element and a rear-side second partial traction element), wherein the first partial traction element is formed by using a non-metallic fiber material. Thus, the ground-side first portion of the traction elements is formed substantially or entirely of a non-metallic material. The material can remain in the ground without problems due to rusting or a firm metal barrier.

According to a further aspect of the invention, the rear-side second traction element is releasably connected to the first traction element via a connecting device. The second portion traction elements may be made from virtually any material. The connecting device between the two partial traction elements is releasable, so that the second partial traction element can be flexibly adapted according to the arrangement and, if necessary, removed again from the ground. Thus, a distraction anchor is provided.

According to another aspect of the present invention, the connecting device includes: a first coupling element coupled to the first portion of the traction element; and a second coupling element coupled to the second portion of the traction element. The two connecting elements thus represent coupling elements which can be released from, connected to or coupled to one another by means of a suitable type of connection.

According to a further development of the invention, it is preferred that the first connection element and the second connection element are releasably connected to each other via a thread. The ground anchor can be assembled and installed quickly and efficiently.

The preferred embodiment of the present invention is that the non-metallic fiber material is a glass fiber reinforced plastic material. This kind of glass fiber reinforcement can absorb high tensions even in relatively small diameter parts of the traction element. The material is groundwater neutral and does not rust in the ground. At the same time, it can be easily perforated or cut during earthworking activities (e.g., when performing drilling operations on adjacent property). Therefore, there is no urgent need to remove this ground side component of the anchor. The first partial traction elements are preferably formed entirely or substantially from fiberglass material.

Another preferred embodiment of the invention can be seen in view of the fact that the second partial traction element comprises a metallic material. This material may be substantially reusable due to the removability of the second portion traction elements.

According to a further development of the invention, it is advantageous if the first partial traction element and/or the second partial traction element is constructed as a rod, a tube or a cable. These elements permit themselves to be easily produced and used as traction elements. In particular in so-called traction anchors, a flexible cable may be provided, which may be both a steel cable or a glass fibre rope.

According to a further development, it is advantageous here for at least one of the connecting elements to be fitted axially onto the associated partial traction element. In particular, the connecting element on the air-side or rear-side partial traction element can be simply releasably connected to the connecting element. Which may be rotatably mounted. This may make the connection easier.

The connecting element may be constructed in virtually any manner. An embodiment variant according to the invention, which thus consists in that at least one of the connecting elements is constructed tubular, results in a particularly advantageous construction.

A further advantageous configuration of the invention is that the stop element is fastened to the end of at least one of the partial traction elements in the connection region and that said stop element is accommodated in the cavity of one of the connection elements and comes into contact with a stop on the connection element to form an axial fixation. The stop elements may be joined, welded or fastened in any way to the respective end regions of the partial traction elements. The stop element can thus be accommodated in the cavity of the preferably tubular connecting element via a sliding of the sleeve-shaped connecting element from the opposite side. Here, preferably an annular stop is located on the inner side of the connecting element, said stop coming into contact with the stop element to form an axial fixation. Resulting in a simple and particularly robust axial connection.

A further preferred embodiment variant of the invention provides that the stop element is designed as a clamping cone. Here, the clamping cone is preferably fastened in a suitable manner to the end of the second partial traction element (i.e. the clamping traction member). In case a steel cable is used as clamping pulling means, this may take place by welding or by crimping or clamping or in another suitable manner. The attachment is made from the opposite end of the second partial traction element (which only occupies a small part of the total length of the ground anchor, preferably a maximum of 1 to 2 m). A correspondingly conical stop ring is provided on the inner side of the connecting element assembled in this way, the clamping cone abutting appropriately on said ring. This achieves good force transmission and clamping.

For a certain high tensile strength, according to the invention it is provided that the first partial traction element and/or the second partial traction element is constructed from a plurality of strands of fiber material. The first portion of the traction elements (which may also be referred to as anchor traction elements) may include carbon fibers, synthetic fibers, glass fibers, ceramic fibers, or natural fibers as the fibrous material. By the arrangement of a plurality of strands parallel to each other and preferably arranged in a loop, good force transmission and force introduction is achieved in the sleeve-shaped connecting device. Preferably, the fiber material strand is integrated in the sleeve with the surrounding sleeve-shaped connecting device over a length of up to 2 m. In general, the ground anchor may be assembled from a plurality of first and second partial traction elements or partial traction strands, wherein a plurality of connection devices are also provided.

Furthermore, the invention also comprises a ground anchor, characterized in that the traction element comprises at least one ground-side first partial traction element and a rear-side second partial traction element, wherein the ground-side first partial traction element is formed from a non-metallic fiber material, and in that the first partial traction element is releasably connected to the second partial traction element by means of a connecting device. The ground anchor represents a removable anchor which can be used in particular to form the aforementioned anchor device.

Drawings

The invention is further described below on the basis of preferred exemplary embodiments, which are schematically represented in the drawing. The drawings are shown in the following:

FIG. 1: according to the utility model discloses a local cross section view of the connection area of first ground anchor assembly;

FIG. 2: a partial cross-sectional view of another drill anchor according to the present invention;

FIG. 3: a cross-sectional view of another ground anchor in the ground according to the present invention;

FIG. 4: a cross-sectional illustration of section a-a of fig. 3;

FIG. 5: a cross-sectional illustration of section B-B in FIG. 3;

FIG. 6: a partial cross-sectional view of another drill anchor according to the present invention in the ground;

FIG. 7: a cross-sectional view of section a-a in fig. 6; and

FIG. 8: cross-sectional view of section B-B in fig. 6.

Detailed Description

In a manner known per se, the illustrated ground anchor 10 comprises an elongated traction element 20, which is only partially represented. The pulling element 20 has, at its ground-side end region, a connecting section, on which the anchor body, which is larger in diameter, can be formed from a concrete material. In an anchor assembly according to the invention, in which the drill anchor 10 is introduced into a borehole in the ground, the concrete material may be injected or introduced in some other way into the area of the anchoring section via a supply line, not shown. After curing of the concrete mass, the anchor body securely connects the traction element 20 with the surrounding ground area.

According to the invention, the traction element 20 comprises, on its ground-side end, a first partial traction element 22, which is made of a non-metallic fiber material. Preferably, the first partial traction elements 22 are formed from a glass fibre reinforced plastic material. The glass fibers here extend substantially in the longitudinal direction of the pulling element 20, wherein said glass fibers are connected to one another via the plastic material. First portion traction elements 22 may be formed between 10% and 95% of the length of traction elements 20, preferably a substantial portion of the length of traction elements 20.

The other partial section of the pulling element 20 is formed by a second partial pulling element 24, the second partial pulling element 24 being formed in a known manner from the materials conventionally used for ground anchors, in particular rods or wire ropes. The free end of the second partial traction element 24 projects out of the ground area and is provided with a connection unit (not shown) for a clamping element. The forces can be absorbed via the traction element, for example by the construction pit support, and dissipated into the rear region of the ground via the traction element 20 of the ground anchor 10.

According to the present invention, first portion traction elements 22 are connected with second portion traction elements 24 via releasable connection apparatus 40. Here, the connecting device 40 comprises a first connecting element 42, which is configured in the type of a tube or sleeve or is firmly connected with the end of the first partial traction element 22. The connection may occur via bonding, welding, crimping, or in another suitable manner.

Furthermore, the connecting device 40 comprises a second connecting element 44, the second connecting element 44 being attached on the end of the second partial traction element 24. Here, the second connecting element 44 is configured with an inner cavity 48 in the form of a tube or sleeve. The area of the inner side of the inner cavity 48 tapers towards the second partial traction element 24, wherein a conical stop 50 or stop hole is formed. The stop element 26 is firmly attached to the corresponding end of the second partial traction element 24. In the illustrated embodiment, the stop element 26 is configured as a clamping cone having a cone angle that corresponds to the cone angle of the annular stop 50 at the cavity 48 of the second connection part 44. The second coupling part 44 is fitted on the second partial traction element 24 from the opposite end so that an axial fixing is formed at least in one direction. The second coupling element 44 is rotatably mounted relative to the second partial traction element 24, at least in an axially unloaded state.

At the sleeve-shaped second connecting element 44, an internal thread 47 is formed on the end opposite the stop 50. The region with the internal thread 47 is sealingly separated with respect to the region with the stop 50 by means of a sealing gasket 30. An external thread 46 corresponding to an internal thread 47 on the second connecting element 44 is formed on the free end of the first connecting part 42.

To form the ground anchor 10, a first connecting element 42 having external threads 46 is threaded into internal threads 47 of a second connecting element 44. If the threaded connection can be released again in a corresponding manner, for example after the construction pit support has stopped, the second partial traction element 24 can be removed again from the ground. Second portion traction elements 24 may be configured as a disposable component or for multiple uses.

According to fig. 2, another ground anchor 10 according to the invention comprises a first partial traction element 22, on the ground-side end of which a point 21 is attached. An anchor section may be formed in this region. The first partial traction element 22 is formed by a plurality of partial strands 22a, 22b, which partial strands 22a, 22b are separated and spaced apart from each other by a distance of a few meters via a spacer element 28. The strands 22a, 22b are consolidated in the housing 23 towards the connecting device 40 and are thus introduced into the first connecting element 42 of the connecting device 40, said housing 23 preferably being formed of PVC. In the tubular first connecting element 42, the individual strands 22a, 22b of the first partial traction element 22 can be firmly connected via bonding.

The first connecting element 42 is connected (preferably screwed) to the second connecting element 44, in which the second partial traction element 24 (the so-called clamping element 18) is fastened. By means of the clamping plate 16 and the clamping element 18, the ground anchor 10 can be subjected to traction stresses in a manner known per se.

Fig. 3 to 5 show a further ground anchor 10 according to the invention in an anchor assembly according to the invention in a borehole 5 in the ground 3. The anchoring section 14 is located in the lower region of the ground anchor 10, along which section the anchoring body can be constructed by supplying a curable mass, in particular concrete.

In the ground anchor 10 according to fig. 3, the first partial traction element 22 is constructed from a total of 6 strands, as can be seen from the enlarged sectional view of fig. 5. Here, each strand of the first partial traction element 22 may itself be made of a separate strand of, for example, a glass fiber reinforced plastic material. Here, each partial strand of the first partial traction element 22 is connected via a different connecting device 40 to a partial strand of the steel cable, which is designed as a second partial traction element 24. Here, the three connecting devices 40 are each located at the same height, with two three-part arrangements (two tripartite arrangements) being axially offset from each other, as will be seen from fig. 3 and 4.

Another ground anchor 10 according to the invention is shown in fig. 6 to 8, which largely corresponds to the ground anchor 10 in fig. 3. In particular, first partial traction element 22 and second partial traction element 24 are each assembled from 6 partial strands, as can be seen from the enlarged cross-sectional views of fig. 7 and 8. In contrast to the arrangement according to fig. 3, two connecting devices 40 are each combined into groups at the same height, wherein in total a three-group two-part arrangement of the connecting devices 40 is provided. The partial strands of the first partial traction element 22 and of the second partial traction element 24 are therefore connected to one another in an axially displaced manner in this two-part group. Thereby preventing unnecessary diameter enlargement of the ground anchor 10. Due to the simple connectability of the respective partial pulling elements 22, 24, these elements can be simply packaged and composed.

Claims (11)

1. An anchor device in the ground (3) with a ground anchor (10), which ground anchor (10) has an elongated traction element (20), which elongated traction element (20) is introduced into a drill hole (5) in the ground (3), wherein an anchor body is connected with the traction element (20) at a ground-side anchoring section, which anchor has a larger outer diameter than the traction element (20), and which traction element (20) comprises a non-metallic material,

wherein the traction element (20) comprises at least one ground-side first partial traction element (22) and a rear-side second partial traction element (24), wherein the ground-side first partial traction element (22) comprises a non-metallic fiber material, and

wherein the first partial traction element (22) is releasably connected to the second partial traction element (24) by means of a connecting device (40),

it is characterized in that the preparation method is characterized in that,

the connection device (40) comprises: a first coupling element (42) coupled to the first partial traction element (22); and a second connecting element (44) which is connected to the second partial traction element (24) and which is connected to the second partial traction element

Characterized in that the first connection element (42) and the second connection element (44) are releasably connected to each other via threads (46, 47).

2. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

the non-metallic fiber material is a glass fiber reinforced plastic material.

3. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

the second partial traction element (24) comprises a metallic material.

4. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

the second partial traction element (24) is designed as a rod, a tube or a cable.

5. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

at least one of the first connection element (42) and the second connection element (44) is configured in the shape of a tube.

6. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

at least one of the first connecting element (42) and the second connecting element (44) is axially fitted to the associated partial traction element (22, 24).

7. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

a stop element (26) is fastened in a connection region on one end of at least one of the first partial traction element (22) and the second partial traction element (24), and

characterized in that the stop element (26) is accommodated in a cavity (48) of one of the first and second connection elements (42, 44) and is in contact with a stop (50) on the corresponding connection element to form an axial fixation.

8. The anchor device of claim 7,

it is characterized in that the preparation method is characterized in that,

the stop element (26) is designed as a clamping cone.

9. The anchor device of claim 1,

it is characterized in that the preparation method is characterized in that,

the first partial traction element (22) and/or the second partial traction element (24) are constructed from a plurality of strands of fibrous material.

10. An anchoring element for the ground surface is composed of a base,

having an elongated traction element (20), to which elongated traction element (20) an anchor body can be firmly connected on a ground-side anchoring section, wherein the traction element (20) comprises a non-metallic material,

wherein the traction element (20) comprises at least one ground-side first partial traction element (22) and a rear-side second partial traction element (24), wherein the ground-side first partial traction element (22) is formed from a non-metallic fiber material, and

wherein the first partial traction element (22) is releasably connected to the second partial traction element (24) by means of a connecting device (40),

it is characterized in that the preparation method is characterized in that,

the connection device (40) comprises: a first coupling element (42) coupled to the first partial traction element (22); and a second connecting element (44) connected to the second partial traction element (24),

the first connection element (42) and the second connection element (44) are releasably connected to each other via threads (46, 47).

11. The ground anchor as recited in claim 10, for an anchor device as recited in claim 1.

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