WO2021233753A1

WO2021233753A1 - Method for creating a tension anchor in the ground, and receiving drum for a tension cable element

Info

Publication number: WO2021233753A1
Application number: PCT/EP2021/062588
Authority: WO
Inventors: Martin Mußack; Matthias Wachinger
Original assignee: Bauer Spezialtiefbau Gmbh
Priority date: 2020-05-22
Filing date: 2021-05-12
Publication date: 2021-11-25
Also published as: EP3913144A1; EP3913144B1

Abstract

The invention relates to a method for creating a tension anchor in the ground with at least one flexible tension cable element which is unwound from a receiving drum and, to form the tension anchor, is introduced into an anchor hole in the ground, which method is characterized in that the receiving drum is suspended on a movable holding arm in a rotatable manner in order to unwind the tension cable element. The invention further relates to a receiving drum for a tension cable element for creating a tension anchor in the ground, comprising a drum-shaped basic body having an inner receiving space for receiving at least one tension cable element and at least one outlet opening for the tension cable element. There is provision that the drum-shaped basic body has arranged thereon a central shaft with a connecting portion by means of which the drum-shaped basic body is able to be suspended centrally.

Description

PROCEDURE FOR CREATING A TENSION ANCHOR IN THE SOIL AND

RECEIVING DRUM FOR A PULLING ROPE ELEMENT

The invention relates to a method for creating a tie rod in the ground with at least one flexible tension cable element, which is unwound from a take-up drum and inserted into an anchor hole in the ground to form the tie rod, according to the preamble of claim 1.

The invention further relates to a receiving drum for a pull rope element for creating a tie rod in the ground with a drum-shaped base body with an inner receiving space for receiving at least one pull rope element and at least one outlet opening for the pull rope element, according to the preamble of claim 5.

Tie rods, also known as ground anchors, have long been used in special civil engineering, for example for back anchoring retaining walls. An anchor hole is made in the ground, in which a tie rod is then inserted and anchored in the ground, for example by means of high pressure injection. By applying a tension element to the free end of the tie rod, for example, forces can be diverted backwards into the ground from a support wall.

Depending on the forces to be dissipated, tie rods can be several meters in length, often from 5 to 20 meters and more. With such lengths, it is common not to use rigid tie rods, but tie rods that are constructed with one or more flexible cable elements. Such flexible pull rope elements are arranged in a coiled form in a receiving drum for storage and transport. Such flexible pull rope elements emerge from EP 3517688 A1, for example. For storing and transporting such long pull rope elements, it is known to arrange the se in a wound form in a receiving drum, which usually have a diameter of between 1 and 3 meters. The Aufnahmetrom mel is usually rotatably Gela Gert on an inclined bearing block, which is positioned directly on an anchor hole on the floor. A worker can then pull the pull rope element out of the take-up drum by hand and insert the pull rope element into the anchor hole while rotating the take-up drum.

Such manual work is time-consuming and strenuous. In addition, there is a risk of stronger steel rope pull rope elements being under tension in the coiled form, with the tension being able to abruptly decrease, especially when the last pull rope section is removed from the take-up drum. As a result, the end of the pull rope can move uncontrolled and abruptly, which represents a not inconsiderable risk of injury for workers in the vicinity of the drum.

Auxiliary or support excavators with a gripping device for gripping drill pipe elements are known for handling drill pipe elements, so et wa from EP 3382 139 B1. However, such support devices are only intended for rigid drill pipe elements.

The invention is based on the issue of specifying a method and a receiving drum with which a simple and safe creation of a tie rod in the ground with at least one flexible pull cable element is made possible.

The object is achieved on the one hand by a method with the features of claim 1 and on the other hand by a receiving drum with the features of claim 5. Preferred embodiments of the invention are given in the dependent claims.

The method according to the invention is characterized in that the receiving drum for unwinding the pull rope element is rotatably suspended on a movable holding arm. A basic idea of the invention is to no longer store a take-up drum standing on the ground on a bearing block, which is difficult to handle and requires a suitable parking space at the anchor hole. According to the invention, the take-up drum is freely suspended so that it can be rotated in a simple manner. A movable holding arm is provided for hanging, so that simple positioning and handling of the receiving drum is made possible.

In principle, the take-up drum can be freely rotatably mounted. According to a development of the invention, it is particularly advantageous that a rotary drive is arranged on the holding arm, with which the take-up drum is rotated in order to bend the pull cable element. The rotary movement can thus take place mechanically via its own rotary drive, so that a manual rotary movement by a worker can be dispensed with. This makes work easier and increases work safety.

In principle, the holding arm can be provided on a stationary device. According to a development of the invention, it is particularly advantageous that the holding arm is attached to a vehicle with which the receiving drum is moved. The vehicle can be a conventional construction vehicle, in particular a support vehicle, which is used on construction sites with drilling equipment. In particular, the vehicle can be a small excavator or a small excavator-like vehicle with a crawler or wheeled running gear. Such vehicles have a rotatable superstructure on which a holding arm is arranged, which is adjustable by several, approximately horizontal swivel joints. An operator's cabin is provided on the superstructure for a machine operator so that he can transport and position the receiving drum in a protected manner and, if necessary, also operate the rotary drive.

A further advantageous embodiment of the invention consists in that gripping tongs are arranged on the holding arm, with which a connecting section on a central center shaft of the receiving drum for holding and hanging up the receiving drum is releasably gripped. The take-up drum can be designed in a simple manner without its own pivot bearing. The rotation can follow in particular via the rotary drive and the rotatable suspension on the support arm. Due to the free suspension of the take-up drum at a distance Above the ground by means of the holding arm, the receiving drum can be positioned at the anchor hole with a high degree of freedom, regardless of the ground conditions. This makes it easier to unroll the pull cord wound in or on the take-up drum and to insert it into the anchor hole.

With regard to the receiving drum, the invention is characterized in that a central center shaft with a connecting section is arranged on the drum-shaped base body, with which the drum-shaped base body can be suspended in the middle. The drum-shaped base body is approximately cylindrical with a bottom area and a peripheral wall area. A top can be open or closed. In the longitudinal direction of the drum, a central shaft is arranged, which preferably protrudes axially beyond the height of the circumferential wall. A connecting section with which the receiving drum can be releasably suspended from the holding arm is arranged on the central center shaft.

The base body can in principle be designed as a closed body or a body with closed walls. According to a further development of the invention, a particularly easy-to-handle take-up drum is achieved in that the base body is constructed from struts with a framework structure. The recording drum is thus formed with a strut or lattice structure, so that a lightweight construction is given in principle Lich. The structure can be formed from steel or a light metal, in particular an aluminum material. As a result, a hanging load is reduced on the support arm.

Another useful embodiment of the invention is achieved in that the connecting section has at least one radially directed retaining bolt. This can be used particularly well to form a suspension on the holding arm.

In particular, it is advantageous that the retaining bolt has an outer diameter which corresponds to an outer diameter of a drill rod element. In this way, the connecting portion can be gripped by conventional gripping pliers, which is known and used, for example, for gripping Bohrge rod elements. For the suspension, a standard element can be used to create a detachable connection. Into the- In particular, a support vehicle, which is already known from drilling equipment, can also be used for the handling of drill rod elements for anchor drilling.

In principle, the take-up drum, which is constructed essentially rotationally symmetrically, can be designed in any way. The take-up drum preferably has a lateral circumferential wall against which the tension cable elements, which are under tension, rest radially outwards in their wound state. To pull it off, it is particularly advantageous that the receiving drum has a bottom and a lateral peripheral wall on which at least one outlet opening for the pull rope element is arranged. Through the at least one receiving opening on the circumferential wall, the pull cable element can thus be withdrawn or unwound approximately tangentially from the receiving drum. This he allows an efficient removal and insertion of the pull rope element.

Furthermore, the invention comprises an arrangement for supplying a Zugseilelemen tes to create a tie rod in the ground, which is characterized in that at least one pull rope element is mounted in a previously described inventive Shen receiving drum and that the receiving drum via a connecting section on the central center shaft rotatably is hung on a holding arm. The receiving drum and the arrangement according to the invention can be used to carry out the method according to the invention described above. The advantages described above can be achieved in this way.

According to a further development of the invention, it is particularly advantageous that a rotary drive is arranged on the holding arm, with which the take-up drum can be rotated for unwinding the pull rope element. The rotary drive has a Ro tor, which can be connected non-rotatably to a center shaft of the take-up drum. In this way, the rotor and the take-up drum can be actuated with power.

Particularly good handling is achieved by a variant of the invention in that the holding arm is arranged on a vehicle with which the receiving drum can be moved freely. So the drum can go through the vehicle can not only be hung freely rotating at the anchor hole, but the take-up drum can also be efficiently transported to and from the anchor hole.

It is particularly useful that the vehicle is an excavator vehicle on which a holding arm is adjustably mounted. Such excavator vehicles, in particular small excavators, can be procured and used inexpensively, with an excavator shovel being replaced by a holding device with a rotary drive.

According to a further embodiment of the invention, it is advantageous that gripping tongs are arranged on the holding arm, with which the connecting section on the central shaft of the receiving drum can be gripped for holding and hanging up the receiving drum. The gripping pliers as a holding device are in particular a single or double collet with clamping claws, so that a centric center shaft can be gripped in a non-positive and / or positive manner. With a corresponding adjustable support arm, preferably with an additional swivel head with at least one further swivel axis, the receiving drum can not only be freely suspended, but also adjusted relative to the vertical, so that a suitable angle can be set in relation to the anchor hole for efficient unwinding.

The invention is explained below using preferred exemplary embodiments, which are shown schematically in the accompanying drawings. In the drawings show:

Fig. 1 is a side view of a take-up drum according to the invention;

Figure 2 is a top plan view of the take-up drum of Figure 1; and

3 shows a side view of an arrangement according to the invention for feeding a pull rope element with the take-up drum from FIGS. 1 and 2.

According to FIGS. 1 and 2, a receiving drum 10 according to the invention has a drum-shaped base body 12 with a bottom 13 and an outer peripheral wall 14. The drum-shaped base body 12 is constructed overall with a framework or lattice structure of struts 15, so that overall a light weight of the preferably metallic receiving drum 10 is achieved. The essentially rotationally symmetrically constructed take-up drum 10 has a central center shaft 16 which extends in an axial longitudinal direction and forms an axis of rotation for the take-up drum 10. A connecting section 17 is attached to an upper end of the central shaft 16, which protrudes axially above the circumferential wall 14. In the exemplary embodiment shown, the connecting section 17 is formed by two radially directed retaining bolts 19 which extend radially away from the center shaft 16 opposite one another.

Inside the receiving drum 10, a receiving space 11 is formed for receiving one or more traction cable elements (not shown) in a wound state. In the illustrated embodiment, the diameter of the take-up drum is about 2.5 m, so that a flexible pull cable element with a length of up to 20 m and more can easily be accommodated in the take-up drum 10. The pull rope element is usually composed of one or more steel ropes and is withdrawn or unwound from the receiving drum 10 via a Austrittsöff opening 18 and introduced into an anchor hole, not shown, in the Bo.

An arrangement according to the invention for supplying a pull rope element to He put a tie rod in the ground with the receiving drum 10 according to the invention is clearly shown in FIG. The receiving drum 10 is suspended by means of a holding arm 20 at a distance from the floor, so that the receiving drum 10 can be positioned almost anywhere and regardless of the ground conditions.

In the arrangement according to the invention according to FIG. 3, the holding arm 20 is part of a vehicle 40. The vehicle 40 has a crawler undercarriage 42 on which an upper carriage 44 with a cabin 46 for an operator is rotatably arranged around a vertical axis. The holding arm 20 is mounted on the upper carriage 44 so as to be adjustable about a horizontal pivot axis. The holding arm 20 is itself formed from a plurality of arm elements 26 which are connected to one another via joints 28 and can be adjusted by means of hydraulic cylinders 30.

A swivel head 32 with a rotary drive 24 is mounted on the free end of the holding arm 20. Underneath the rotary drive 24 there is a gripper 22 with two collet chucks gene arranged with two claws, through which the two radially directed retaining bolts 19 of the connecting portion 17 on both sides of the central shaft 16 of the receiving drum 10 can be gripped positively.

By actuating the rotary drive 24, the center shaft 16 and thus the receiving drum 10 can be rotated as a whole, so as to cause or support an unwinding of the Zugseilele Mentes from the receiving drum 10. Due to the adjustable support arm 20 and the pivot head 32 pivotably arranged thereon with at least one further pivot axis, the tensioned Aufnah meter drum 10 can be arranged and operated over the floor in almost any position. In particular, a longitudinal or rotational axis of the receiving drum 10 can also be employed against a vertical in space.

With the arrangement according to the invention, a pull rope element can be handled in a simple and particularly safer manner by an operator when creating a tie rod with a bottom. As the vehicle 40, a caterpillar vehicle with gripping pliers can be used in particular, which is known and used for feeding rod-shaped drill pipe elements. Accordingly, the retaining bolts 19 of the connecting section 17 of the receiving drum 10 can be designed with a typical diameter of a drill rod element, which can usually be between 10 cm and 30 cm.

Claims

PATENT CLAIMS

1. A method for creating a tie rod in the ground with at least one flexible len pull rope element which is unwound from a take-up drum (10) and is inserted into an anchor hole in the ground to form the tie rod, characterized in that the take-up drum (10) is used to unwind the pull rope element is rotatably suspended on a movable holding arm (20).

2. The method according to claim 1, characterized in that a rotary drive (24) is arranged on the holding arm (20), with which the receiving drum (10) is rotated for unwinding the pull rope element.

3. The method according to claim 1 or 2, characterized in that the holding arm (20) is attached to a vehicle (40) with which the receiving drum (10) is moved.

4. The method according to any one of claims 1 to 3, characterized in that on the holding arm (20) a gripper (22) is arranged with which a connecting portion (17) on a central center shaft (16) of the receiving drum (10) for Holding and hanging the receiving drum (10) is releasably gripped.

5. Receiving drum for a pull rope element for creating a tie rod in the floor, in particular according to a method according to one of claims 1 to 4, with a drum-shaped base body (12) with a receiving space (11) for receiving at least one pull rope element and at least one outlet opening ( 18) for the pull rope element, characterized in that a central center shaft (16) with a connecting section is arranged on the drum-shaped base body (12), with which the drum-shaped base body (12) can be suspended in the middle.

6. take-up drum according to claim 5, characterized in that the base body (12) is built up with a framework structure made of struts (15).

7. receiving drum according to claim 5 or 6, characterized in that the connecting portion (17) has at least one radially directed retaining bolt (19).

8. receiving drum according to claim 7, characterized in that the retaining bolt (19) has an outer diameter which corresponds to an outer diameter of a drill pipe.

9. receiving drum according to one of claims 5 to 8, characterized in that the receiving drum (10) has a bottom and a lateral peripheral wall (14), on which at least one outlet opening (18) for the pull rope element is arranged.

10. Arrangement for feeding a pull rope element for creating a Zugan kers in the ground, in particular according to a method according to one of Ansprü che 1 to 4, characterized in, that at least one pull rope element is stored in a take-up drum (10) according to one of claims 5 to 9, and that the take-up drum (10) is rotatably suspended on a holding arm (20) via the connecting section (17) on the central center shaft (16).

11. The arrangement according to claim 10, characterized in that a rotary drive (24) is arranged on the holding arm (20), with which the receiving drum (10) can be rotated for unwinding the pull rope element.

12. The arrangement according to claim 9 or 10, characterized in that the holding arm (20) is arranged on a vehicle (40) with which the receiving drum (10) is freely movable.

13. The arrangement according to claim 12, characterized in that the vehicle (40) is an excavator vehicle on which a holding arm (20) is adjustably mounted.

14. Arrangement according to one of claims 10 to 13, characterized in that a gripper (22) is arranged on the holding arm (20), with which the connecting portion (17) on the central center shaft (16) of the receiving drum (10) for Holding and hanging up the receiving drum (10) is within reach.