Method for placing traction or compression anchors beneath the water level for anchoring a sheet pile wall or the like

The invention relates to a method and iene device for setting a tensile or compressive anchor with a rod, wire or tubular anchor member below a water level for anchoring a sheet pile wall, diaphragm wall, quay wall or the like, wherein a first of the sheet pile wall in height of the bore to mounting for a drill mast mounted with an underwater drill, then pierced the sheet pile and then introduced the anchor element and anchored (cf.. DE-C 3 122 032).

A known device of this type is used for driving an anchor pile by sheet piling. In this device, the holding device consists of a base plate, the angle at the end of the drill carriage to the desired drilling direction, preferably arranged for this at an angle of 45 degrees and is firmly connected to the mount's (DE-C 31 22 032). This device must be attached by the diver on the sheet piling; the operation of the drilling machine is effected from above the water surface via a control unit, which is connected via hoses to the drill. With the aid of this apparatus, the sheet pile is first pierced by means of a tubular cutter; the drill remains in the sheet pile wall and serves as a guide during driving of the anchor pile by the sheet piling through.

A disadvantage of this known method and device that a number of works can be carried out by divers, also that the drill is lost and that the ramming of Ankerpfahies, apart from the guide through the short drill pipe without further guidance and thus no possibility of control takes place. If the anchor pile should hit an obstacle when they are driven, the sheet piling has to be pierced again.

Accordingly, the invention is based on the object to provide a method of the type mentioned for setting a tensile or compressive anchor suitable and specify a suitable for its implementation means whereby that must be performed underwater work to a minimum or completely avoided and the entire be recovered drill.

According to the invention, this object is procedurally achieved in that raised after adjustment and fastening the holding device to the mount, the free end of the carriage by pivoting about an arranged on the fixture joint with a horizontal axis above the water level, on the protruding above the water level end the mount the drill mounted with a first drill to drill through the sheet pile and then lowered the gun carriage in the drilling position and the sheet pile wall is pierced, that raised by the retraction of the first drill the mount again above the water level and a drill pipe for the production of the well bore in full length mounted, lowered the carriage back into the drilling position and the drilling tube is driven through the opening in the sheet pile wall and into the ground and in that after insertion of the anchor element, the drill pipe under compression of the cavity between the anchor member and the borehole wall drawn with hardening material and after re-lifting mount is dismantled above the water level. In this case, the anchor element can be introduced at the same time with the drill pipe during production of the bore hole in this.

The holding device is expediently held on tension members, such as threaded rods, ropes or the like connected and adjusted and suitably secured by clamping at the sheet piling. The carriage can be raised and lowered by means of a cable.

Finally, it is possible to set after the dismantling of the drill pipe to a drill holding Traverse and optionally an anchor nut and set up again after lowering the carriage by means of the drilling machine on the anchor element and to attach to its anchoring in this.

The advantage of the method consists in the fact that the mounting of the drill, the drill pipe, the anchor element and optionally a holding brace and an anchor nut with raised up mount above the water level from land done and the carriage in a simple manner by means of a cable in the drilling position can be lowered. Also, the holding and adjusting the holding device as well as their attachment to the sheet piling can be done from shore via cables and corresponding control units. Since the length of the drill mast is greater than the length of the drill pipe and the anchor element, can not only sacrificed the otherwise necessary shot as introducing the drill pipe and anchor member, but possibly even inserted the anchor element from the outset in the drill pipe and together with it into the ground are screwed.

A particularly suitable for carrying out the inventive device with a respect to a sheet pile wall or the like adjustable and attachable to the holder and an attached drill carriage with guides for a drill and a drill and / or a drill pipe is characterized in that said on the full stored length of the drill pipe and the anchor element dimensioned mount to the holding device about a hinge with horizontal, running parallel to the sheet piling axis swivel and is using a cable from land raised and lowered.

The holding device is convenient to Zuggliedem such as threaded rods, ropes or the like suspended and adjustable from the shore as well as raised and lowered in front of the sheet pile wall.

The joint can be detachable and can be provided vertical guide rails, may be lifted along the lower end of the mount on the water surface and lowered again.

For the clamped fastening to the sheetpile, the holding device may be provided with pliers which are operable by means of hydraulic cylinder-piston units. For fixing the holding device on the sheet pile wall but may also be provided magnets or suction devices.

Suitably, the holder of the contour of the sheet pile wall adapted guide body. Characterized the centering of the holding device on the sheet pile wall can be facilitated, was added the torque occurring during drilling and achieves a security against horizontal displacements of the holding device.

The carriage is furthermore mounted pivotably on the holding device around a joint with running at right angles to the drilling axis axis. Here is the pivot axis of that camp go at least approximately through the center of the hole in the sheet pile wall. The arrangement of this joint in immediate vicinity of the opening of the sheet pile wall and so that its axis passes through the center of the opening and the well bore axis intersects, has the advantage that it can be drilled through the same opening in the sheet pile wall with different horizontal angles when, for example, in the first drilled towards an obstacle, such as a rock, the drilling Disabled. This further weakening of the sheet pile wall is avoided and accelerates the operation.

Finally, means for pivoting the gun carriage can be provided around the extending at right angles to the drilling axis to the pivot axis and their fixing in a defined position on the holding device. These agents are useful hydraulic cylinder-piston units.

a connecting plate may be disposed between the articulation having a horizontal axis and that at right angles to the drilling axis extending axis. The joint with a horizontal axis and the hinge with running at right angles to the bore axis axis to be united in a ball joint. Finally, the carriage may also be mounted on gimbals on the holding device; in any case, should the pivot axes going through the center of the opening of the sheet piling.

The invention is illustrated below with reference to an embodiment shown in the drawing. It shows<ul><li>Fig. 1 shows a schematic cross section through a sheet pile using a device according to the invention in the raised carriage,</li><li>FIG. 2 shows an illustration. Illustration corresponding with lowered in drilling position carriage 1,</li><li>Fig. 3 shows a section through the sheet pile wall with the anchor head in the final state,</li><li>Fig. 4 is a vertical section through the holding device in the region of the sheet piling along the line IV-IV in Fig. 5,</li><li>Fig. 5 is a horizontal section through the holding device along the line VV in Fig. 4,</li><li>Fig. 6 a of FIG. 5 corresponding horizontal section through the holding device with a different hinge arrangement for the pivoting of the drilling unit,</li><li>Fig. 7 shows a detail of FIG. 6 on a larger scale,</li><li>Fig. 8 is a section along the line VIII-VIII in Fig. 7 and</li><li>Fig. 9 a to FIGS. 1 and 2 corresponding cross-section through a sheet pile with another embodiment of the invention.</li></ul>

The setting of an anchor according to the inventive method and using the apparatus can be illustrated with reference to FIGS. 1 and 2. It is assumed that through a Ground anchors to be introduced with an oblique axis 11 through the sheet pile 1 in the underlying earth formation 5 for subsequent securing a sheet pile wall 1 by this. Since the armature is in its entire length below the water level 25, all have to do so. necessary actions are taken under water.

At first, a holder 2 is being prepared, which can be recognized from the water side of the sheet piling. 1 At this holding device 2, which will be explained in more detail with reference to FIGS. 4 and 5, a drill mast 10 is pivotally supported about a joint 3 with a horizontal, parallel to the sheet pile wall 1 extending axis. The length of the mount 10 is chosen so that it can receive the drilling tube required for the sinking of the bore 17 and the anchor member 12 in full length.

As can be seen from Fig. 1, the holding apparatus 2 with the carriage 10 by means of tensile elements 9, for example, threaded rods, lowered from the ground surface to the desired depth and is fixed to the sheet pile wall 1. The carriage 10 is held at its upper end by means of a cable 13, which leads to a telescoping boom 18 to a crane vehicle 33rd In this situation, the mount 10 is mounted from the shore, the drill 14 which is movable by means of a carriage 15 along the carriage 10th

The drill 14 is formed in a conventional manner; it has a drill head and a drive motor. Behind the drill head is a swivel with a run through the drill rod. The washing head can be independent of the drill head along the carriage 10 move.

To the drill 14, a drill 16 is first set with which the sheet pile wall 1 may be pierced. Thereafter, the carriage 10 is discharged by means of the cable 13 in the drilling position; the drill 16 is aligned therewith in the armature shaft 11, which also forms the drilling axis. Then, the drill 14 16 eg by means of a chain drive along the carriage 10 is pulled by the drill toward the sheet pile 1, until the head of the drill 16 is located at the sheet piling and this pierced. Subsequently, the drill 14 is retracted by the drill 16 back into the starting position, the carriage is pivoted about the hinge 3 upwards and the drill dismantled 16 from land.

On the carriage 10, the actual drill pipe is then placed 17 full length, aligned and connected to the drill 14th After renewed discharge of the mount 10 in the drilling position the drill pipe 17 is driven by means of the drill 14 through the previously generated in the sheet pile wall 1 opening 28 therethrough into the formation 5 through to the required depth. Then the head of the drill 14 is detached from the drill pipe 17, the drill 14 is pulled back to the starting position and the carriage 10 is pivoted upward again.

From the ground level from now is an anchor element 12, such as a tie rod, placed and aligned on the carriage 10th At the bottom end of the anchor element 12 is a Verkralleinrichtung 20. Further, a seal plate 22 attached to the anchor member 12, which seals the cavity between the anchor member and the drill pipe 17, and a Verpreßleitung 21, which is passed through the sealing plate 22nd The anchor member 12 is held by the linkage of the flushing head. After renewed discharge of the mount 10 in the drilling position, the anchor element 12 is inserted by means of the drill 14 in the drill pipe 17 until it has reached its desired position.

Since the length of the mount 10 is greater than the length of the anchor element 12, this can be already inserted in the drill pipe 17 and screwed at the same time with the latter in the soil formation. 5

Then the head of the drill 14 is again coupled to the drill pipe 17 in order to draw this can. This situation is shown in Fig. 2. The drill pipe 17 is initially retracted only by a short distance, while the swivel which holds the armature 12 are, remains. After activating the Verkralleinrichtung 20, the anchor element 12 is seated firmly in the ground. While continuously drawing the drill pipe 17, the cavity between the anchor member 12 and the borehole wall is then steadily, eg cement mortar filled with an injection material until this has reached the sealing plate 22 via the Verpreßleitung 21st The injection material thus forms a pressing body 31 Once the drill 14 has reached its initial position again with the drill pipe 17, the Verpreßleitung 21 are dissolved at anchor 12, the carriage 10 pivoted by means of the cable 13 and the drill pipe degraded 17th

At the head of the drill 14 now, a traverse 19, secured for example in the form of a concrete element, are aligned and adjusted. After re-releasing the carriage 10 in the drilling position this traverse 19 can be driven by the drill toward the anchor member 12 and slid over this. The traverse 19 so extends a certain distance in the opening 28 in the sheet piling into 1 (Fig. 3).

After releasing the connection between the crossmember 19 and the drill 14 the latter is moved back to its original position. Thereafter, 23 can be introduced and screwed onto the air-side end of the anchor member 12 in the same way an anchor nut, if this work is not done by divers. Through openings in the cross member 19 can be a possible cavity behind the sheet pile wall 1 is again pressed with injection material 32 and the anchor head are sealed in this manner.

After releasing the connection between the holding apparatus 2 and the sheet pile wall, the holding device is recovered. Unless it is the anchor is a tie rod, the anchor member 12 may be stretched after the complete hardening of the grout 31st

When the carriage is to be raised 10 to its full length above the water level for any reason, then it is possible to 9 at the top of the sheet pile to be disposed between the holder 2 and the anchoring of these supporting tension members guide rails 40, along which the lower end of the mount can be 10 to dissolve the joint 3 is pulled upward (Fig. 9).

An embodiment of the holding device 2 is shown in Figs. 4 and 5 in more detail. The holder 2 is made of a sheet pile to 1 at least partially open housing 26, are provided in the four actuated by hydraulic cylinder-piston units 8 pliers. 7 The outer legs of the pliers 7 are adjusted in their position to the bevel of the individual sheet piles of the sheet pile wall 1 and roughened on their inner surfaces or serrated in order to achieve a good contact with the sheet pile wall the first The tongs 7 are only for fixing the holder 2 on the sheet pile 1; their weight and that of the carriage 10 is supported by the tension members 9, which lead to corresponding anchors on the ground surface.

The holding device 2 is equipped on its side of the sheet pile wall facing matched with the profile of the sheet pile guide elements 24 which facilitate the centering of the holding device as well as support the transmission of the torque occurring during the drilling on the sheet pile wall 1 and relieve the pliers 7th

The carriage 10 is connected via a joint 3, with horizontal, parallel to the sheet pile wall 1 extending axis with a tab 27, which in turn is mounted via a joint 4 with a vertical plane at right angles to the drilling axis 11 extending axis on said housing 26th By means of the joint 3, the carriage 10 in the vertical direction (arrow 29 in Fig. 4) and by means of the joint 4 in the horizontal direction (arrow 30 in FIG. 5) to be pivoted. effected the pivoting of the carriage 10 in the vertical direction (arrow 29), as already described, by means of the cable 13; for pivoting in a horizontal direction (arrow 30) comprises a cylinder-piston unit 6 is arranged on the lug 27, which is supported against the housing 26 of the retaining device. 2

The extension of the axis of the hinge 4 extends through the center of the opening 28 formed in the sheet pile wall 1 and there intersects the drilling axis 11 (Fig. 4). Thereby, it is possible to introduce also a plurality of bores having different horizontal angles through the same opening 28, for example when a hole as a result of an obstacle in the course of the drilling axis to be abandoned.

A further embodiment for the articulated mounting of the mount on the holding device 2 is shown in Figs. 6 to 8. Here are the two, summarized by the joints 3 and 4 given possibilities of movement of the carriage 10 in the vertical and horizontal axis in a ball joint 34th The ball joint 34 consists of a fixed to the carriage 10 via a pivot 35 ball 36, which is rotatable in a recess formed as a partly hollow ball socket 37th The ladle 37 is mounted on a handlebar 38, which is connected at both ends hinged to cylinder-piston units 39; the cylinder-piston units 39 are in turn secured to the housing 26 of the retaining device. 2 The cylinder-piston units 39 are for pressure support of the carriage 10, during a pivoting movement is effected in a horizontal direction by a cylinder-piston unit 6 '. The possibilities of movement of the carriage in the vertical and horizontal directions are again indicated by arrows 29 and 30 respectively.