WO2017174863A1

WO2017174863A1 - A leader for a pile driving rig, a pile driving apparatus, and a pile driving rig

Info

Publication number: WO2017174863A1
Application number: PCT/FI2016/050227
Authority: WO
Inventors: Juhani HYTÖNEN
Original assignee: Junttan Oy
Priority date: 2016-04-08
Filing date: 2016-04-08
Publication date: 2017-10-12
Also published as: EP3440270A1

Abstract

The invention relates to a leader for a pile driving rig (10), the leader (17) being formed of a hollow box section beam with a primarily H-shaped cross-section, having a front wall (30) with guide tracks (23) for an implement movable along the leader (17), and a rear wall (31 ) with a point for fastening the leader (17) to the pile driving rig (10), as well as side walls (32, 33) between the front wall (30) and the rear wall (31 ), in which leader (17) for the pile driving rig (10) the side walls (32, 33) of the leader (17) each comprise a U-shaped side beam 36, 37) whose flange plates (36a, 36b, 37a, 37b) extend outwards from the leader (17). The invention also relates to a pile driving apparatus (12) and a pile driving rig (10).

Description

A LEADER FOR A PILE DRIVING RIG, A PILE DRIVING APPARATUS, AND A PILE DRIVING RIG

Field of the invention

The invention relates to a leader for a pile driving rig, a pile driving apparatus, and a pile driving rig.

Background of the invention

The function of the leader of a pile driving rig is to support the implement of the pile driving rig as well as the pile to be driven into the ground during pile driving. If the pile driving rig is an impact pile driving rig, the loads are compression and tensile stresses which are effective in the longitudinal direction of the leader, are caused by supporting of a hammer moving along the leader by guide tracks on the leader and by pulling ropes guided from a cathead at the top of the leader towards pulling winches placed in the upper carriage of the frame machine, and which thereby tend to bend the leader rearwards, particularly when the hammer fastened to a slide movable along the leader is pulled downwards with great force so that the hammer, in addition to its own weight, tends to apply a static pressing force on the pile to be driven into the ground, in addition to hammering it. In an impact pile driving rig, the load effective on the leader has a dynamic property as well, because when the hammer is applied for driving a pile into the ground, the impulses caused by the impacts are also partly transmitted directly to the leader via the pulling ropes of the pull-down and hoisting winches. In a drilling rig, the impulses caused by the impacts are replaced by a torque load caused by an auger motor and tending to rotate the leader with respect to an axis in its longitudinal direction. This loading causes the greatest tensions in the leader, and it usually has a dynamic property as well, because when the auger drilled pile bites into the ground, the soil is crushed in front of the drill bits by abrupt pulses, causing a variable torque load on the auger drilled pile and thereby on the leader. The torque load caused by the auger motor also requires a high torsional rigidity of the leader so that the torsion of the leader would not become excessively high. When the pile driving rig is a so-called combined pile driving rig for installing both rammed piles to be driven into the ground by impact pile driving, and various auger cast piles to be drilled into the ground, the structure of the leader has to be sufficiently rigid against all the above- mentioned load types, that is, against torque, bending, tensile, and compression loads.

In modern pile driving rigs, the length of the leader has steadily increased to make it possible to install longer and longer piles into the ground. Increasing the length of the leader increases deformations caused by loads in the structures of the leader and thereby the harmful effects of the loads on the leader and the apparatus fastened to it. The situation is particularly critical when the leader is being mounted from the transport position to the use position, or vice versa. Thus, a high bending moment is caused in the leader by its own weight. Increasing the outer dimensions of the leader can naturally be used to increase the torsional and bending stiffness of the leader. However, the weight of the leader should preferably be as light as possible, because a weight increase particularly at the top of the leader increases the risk of overturning the pile driving rig and thereby the requirement to balance the pile driving rig with heavier and heavier counterweights and to support it with stabilizers extending farther and farther from the frame machine. All this increases the total weight and size of the pile driving rig, which makes it more difficult, for example, to move the rig from one place to another.

Brief summary of the invention It is an aim of the present invention to provide a novel leader which is more rigid and has particularly better torsional stiffness than before but whose external dimensions and weight per length unit make it possible to use a leader longer than before without increasing the support of the frame machine and the size of the counterweights. It is also an aim of the invention to introduce a pile driving apparatus and a pile driving rig equipped with a leader according to the invention.

The aim of the invention is achieved with a leader having a cross-sectional structure comprising a box section whose opposite sides are formed of U- shaped beams opening outwards in opposite directions, their both flange plates being connected with second, inwards directed U-beams which thus constitute angular beams increasing the torsional and bending stiffness at the ends of the leader. The U-beams placed at the cross-sectional front and rear ends of the leader increase the bending stiffness of the leader against bending loads caused by pulling winches, because they increase that area of the cross-section of the leader which causes the greatest increase in the bending resistance of said cross-section (that is, the area far from the neutral plane of bending). At the same time, the U-beams placed inside of the leader increase the torsional rigidity of the box section, because they are placed far from the symmetry axis (torsional centre) of the cross-section of the leader. To put it more precisely, the leader for a pile driving rig according to the invention is characterized in what will be presented in the independent claim 1 , the pile driving apparatus according to the invention is characterized in what will be presented in the independent claim 14, and the pile driving rig according to the invention is characterized in what will be presented in the independent claim 17. Dependent claims 2 to 13 will present some advantageous embodiments of the leader according to the invention, dependent claims 15 to 16 will present some advantageous embodiments of the pile driving apparatus according to the invention, and dependent claims 18 to 19 will present some advantageous embodiments of the pile driving rig according to the invention.

The leader according to the invention has the advantage that thanks to its cross-sectional structure, higher bending and torsional stiffness of the leader can be achieved without increasing the outer dimensions of the cross-section and thereby the weight of the leader. As a result, a pile driving rig equipped with a longer leader than before can be made without increasing the distance between the stabilizers of the frame machine of the pile driving rig and the weight of the counterweight in the rear section of the frame machine. Description of the drawings

In the following, the invention will be described in more detail with reference to the appended drawings, in which

Fig. 1 shows a pile driving rig equipped with a leader according to the inven- tion in a side view; Fig. 2 shows the bottom section and the top section of the leader of the pile driving rig according to Fig. 1 in a side view; and

Fig. 3 shows a cross-section B-B transverse to the longitudinal direction of the leader according to Fig. 2.

Detailed description of some advantageous embodiments of the invention

Figure 1 shows a pile driving rig 10 equipped with a leader according to the invention. This pile driving rig 10 is a so-called combined pile driving rig for the installation of auger drilled piles, rammed piles or grooved/steel piles into the ground by vibration or pressing. When the pile driving rig 10 is used for the installation of auger drilled piles, an auger motor as shown in Fig. 1 is mounted on a slide 22 for an implement 26 on the leader 17. When rammed piles are driven into the ground, the hammer of the pile driving apparatus is mounted on the slide 22, and when grooved/steel piles are driven into the ground by vibration, a vibrator is mounted on the slide 22.

The pile driving rig 10 of Fig. 1 comprises a frame machine 1 1 and a pile driving apparatus 12 mounted on it. The frame machine 1 1 consists of an undercarriage 13 movable on the ground by a crawler track 16, by which the pile driving rig 10, i.e. the frame machine 1 1 and the pile driving apparatus 12 mounted on it, is moved along the ground surface to a desired location where a pile is to be driven. The undercarriage 13 comprises the crawler track 16 and the apparatus needed for moving the pile driving rig 10. Above the undercarriage 13, an upper carriage 14 is mounted on the undercarriage 13 to be swivelled in the horizontal direction by means of a swivel 15. A driving engine 27 is placed in the rear section of the upper carriage 14, and a cabin 18 as well as the required mounting structures and devices for mounting and moving the different parts of the pile driving apparatus 12 are placed in the front section. The different functions of the frame machine 1 1 and the pile driving rig 12 as well as e.g. the transmission for moving the crawler track 16 and changing the travel direction of the frame machine 1 1 are configured to be hydraulically operated by a hydraulic system in the frame machine 1 1 . For effecting the different functions, the driving engine 27 powers hydraulic pumps that belong to the hydraulic system and generate the flow and the pressure of pressurized medium in the hydraulic system, for driving different actuators that belong to the hydraulic system and effect the functions. The cabin 18 is equipped with control devices to be applied by the driver of the pile driving rig 10 for controlling the different functions of the pile driving rig 10. Furthermore, the cabin 18 is equipped with e.g. an electronic control unit for controlling the control valves (magnet and/or servo valves) of the hydraulic system for adjusting and controlling the supply of pressurized medium to the different actuators of the hydraulic system.

The pile driving apparatus 12 comprises a leader 17 and an implement 26 to be installed on it, for example a piling auger or the hammer of an impact pile driving apparatus. In the pile driving rig 10 shown in Fig. 1 , the implement 26 connected to the leader 17 is a piling auger. For connecting the apparatus 26 to the leader 17 in a disengagable manner, a slide 22 is movably connected to the leader in its longitudinal direction and equipped with the necessary mounting means for mounting the implement 26 on the slide 22, as well as with the necessary connecting means and hoses for connecting the implement 26 to the hydraulic system of the frame machine 1 1 . The slide is mounted on guide tracks 23 on the leader 17. The slide 22 is moved along the guide tracks 23 by means of pulling ropes driven by a pull-down winch and a hoisting winch in the frame machine 1 1 . Idlers 25 are provided at different locations by the side of the leader 17 and at the cathead 24 at the top of the leader 17, for guiding the pulling ropes from the pull-down and wind-up winches to the slide 22. According to the implement in question, the pulling ropes are guided via the different idlers so that in the case of different types of implements, the slide 22 is given the desired velocity and force according to the requirements of the pile driving operation to be carried out by said implement.

Figure 2 shows the leader 17 of the pile driving rig 10 according to Fig. 1 in a side view. The leader 17 is formed of two solid sections so that a folding joint (not shown in the figures) is provided in a given location in the longitudinal direction of the leader 17. Thus, a first (solid) section 28 is provided on the first side of the folding joint, and a second (solid) section 29 on the other side. The folding joint is designed and placed between the first section and the second section of the leader 17 in such a way that the second section can be swivelled into a so-called transport position against the first section. Prefera- bly, the folding joint is placed at the midpoint of the leader in its longitudinal direction, because in this way the leader 17 can be made as short as possible, thanks to the folding joint. The function of the folding joint is thus to facilitate the manipulation of the leader 17 - which normally has a length of almost 50 m - when the pile driving rig 10 is moved from one place to another. Normally, the most advantageous location of the folding joint depends on the pile driving rig in question, and on the location of the leader on the pile driving rig. Therefore, instead of the midpoint of the leader in the longitudinal direction, the folding joint may also be placed more closely to the second end of the leader (pointing upwards) or the first end (mounted on the frame machine 1 1 ), according to the arrangement by which, depending on the dimensions of the frame machine 1 1 , the least space taking unit is achieved when the leader 17 is in the transport position. On the other hand, factors affecting the location of the folding joint may also include the manipu- lability of the leader 17 and the way of turning the second section 29 of the leader 17 from the transport position to the use position and from the use position to the transport position again.

As stated above, the leader 17 is subjected to various loads during its use. Due to the great length of the leader 17, even relatively small deformations effective on the length of the whole leader 17 (particularly by the torsional moment) cause great displacement shifts between the ends of the leader. As a result, the leader should have such a cross section that a sufficient torsional and bending stiffness is achieved. In the simplest way, this is achieved by making the cross-section of the leader sufficiently large and by using a solid box section (torsional resistance as high as possible). However, because the weight of the leader should be as light as possible so that the demands for supporting the pile driving rig can still be met, the structure of the leader 17 is optimized, in view of this and the requirements set by the functionality of the leader 17. Against the above background, the cross-section of the leader 17 has been designed in the way shown in the cross-sectional view of Fig. 3.

As shown in Fig. 3, the leader 17 is made of a hollow box section beam with a primarily H-shaped cross-section, having a front wall 30 on which a slide 22 is configured to move along guide tracks 23 formed, due to the shape of the leader 17, in the longitudinal direction of the leader; and a rear wall 31 having a point of mounting the leader 17 on the pile driving rig (10); as well as side walls between the front wall 30 and the rear wali 31 (Le. the right side wall 32 and the left side wall 33).

In this case, the leader 17 is formed of U-shaped steel beams which have initially been separate but have been joined during the manufacture of the leader 17, as well as supplementary steel plate structures connected to them. The side walls 32 and 33 each comprise one U-shaped side beam (i.e. the right side beam 36 and the left side beam 37), whose flange plates 36a, 36b, 37a and 37b extend away from the inner parts of the leader 17. Also, the front wall 30 and the rear wall 31 each comprise, in this case, one U-beam (Le. the front beam 34 and the rear beam 35) which are connected to the side beams as shown in Fig. 3 so that the ends of the flange plates 34a, 34b, 35a, and 35b of the front beam 34 and the rear beam abut the ends of the flange plates 36a, 36b, 37a, and 37b of the right side beam 36 and the left side beam 37. In this way, the flange plates 34a and 34b of the front beam 34, and the flange plates 35a and 35b of the rear beam 35 extend to the inside of the cross-section of the leader 17. Thus, the right hand side flange plate 34a of the front beam 34 in the leader 17 of Fig. 3 is connected to the flange plate 36a of the front beam 34 on the side of the right side beam 36, and the flange plate 36b on the side of the left side beam 37 is connected to the flange plate 37a of the side beam 37 on the side of the front beam. In a corresponding manner, the right hand side flange plate 35a of the rear beam 35 Is connected to the flange plate 36b of the right side beam on the side of the rear beam 35, and the left hand side flange plate 35b of the rear beam 35 is connected to the flange plate 37b of the left side beam 17 on the side of the rear beam 35. Thus, the leader 17 formed has a cross-section of the shape of the letter H (in the direction of the front wall 30 and the rear wall 31 ). The function of this appearance is that it simultaneously constitutes guide tracks 23 extending from the front wall 30 and the side walls 32 and 33 to the outer surface of the leader 17, on which guide tracks a slide 22 for carrying an implement 26 is mounted to be movable in the longitudinal direction of the leader 17. In this case, the leader 17 is made as a welded steel structure. In a way shown in Fig. 3, stiffener plates 38 are provided at suitable intervals, one after another, inside the leader 17. Their function is to prevent deformations (deflections or bulges) in the outer wall of the leader subjected to loading, and thereby to increase the rigidity and load bearing capacity of the leader. The stiffener plates 38 are equipped with an opening 45 to reduce the weight caused by the stiffener plate 38. The opening 45 also makes it possible to convey e.g. pressurized medium hoses and wirings of actuators to be connected to the leader 17, inside the leader. Also, the front beams 34, rear beams 35 and side beams 36 and 37 of the leader 17 are provided with oval openings 46 placed at regular intervals, centrally in their transverse direction. The position and spacing of these openings is designed so as to have a minimum effect on the rigidity of the leader 17 and the stresses effective on the walls of the leader 17 when the leader 17 is subjected to loading in different ways.

The stiffener plates 38 of the leader 17 comprise comer pieces by which the stiffener plate 38 is also supported to the inner surfaces of the flange plates 34a and 34b of the front beam and the flange plates 35a and 35b of the rear beam 35, as well as the web plate 34c of the front beam 34 and the web plate 35c of the rear beam 35, across their entire width. Such a structure increases the torsional stiffness of the leader 17, because previously, the locations corresponding to the corner pieces have been unstiffened in a leader of this type.

Furthermore, the structure of the leader 17 comprises stiffeners 39a, 39b, 40a, and 40b formed of elongated plate strips to prevent buckling between the stiffener plates 38 in the longitudinal direction. The stiffeners 39a and 39b against buckling are fastened to the inner surface of the web plate 34c of the front beam 34, and the stiffeners 40a and 40b are fastened to the inner surface of the web plate 35c of the rear beam 35. The stiffeners 39a and 39b increase the strength of the web plate 34c of the front beam 34, and the stiffeners 40a and 40b increase the strength of the web plate 35c of the rear beam 35 against buckling (deformation of the web plate) caused by longitu- dinal compression loads significantly, because they are fastened to the web plates 34c and 35c in a position transverse to their planar surfaces. Thus, the stiffeners 39a, 39b, 40a, and 40b play an important role in the resistance to compression stresses on the leader 17 as well as in the resistance to tensile and compression stresses caused by bending moments that bend the leader with respect to an axis in the direction of the front wall 30 and the rear wall.

Furthermore, corner stiffeners 41 a, 41 b, 42a, and 42b are provided within the inner section formed within the front beam 34, the rear beam 35, the right side beam 36, and the left side beam 37 of the leader 17. These, too, are elongated plate strips placed between the stiffener plates 38. The corner stiffener 41 a is placed between the flange plate 36a of the right side beam 36 on the side of the front beam 34, and the web plate 34c of the front beam 34; the corner stiffener 41 b is placed between the flange plate 37a of the left side plate 37 on the side of the front beam 34, and the web plate 34c of the front beam 34. In a corresponding way, the corner stiffener 42a is placed between the flange plate 36b of the right side beam 36 on the side of the rear beam 35, and the web plate 35c of the rear beam 35; the corner stiffener 42b is placed between the flange plate 37b of the left side beam 37 on the side of the rear beam 35, and the web plate 35c of the rear beam 35. All the corner stiffeners 41 a, 41 b, 42a, 42b are placed, in the side direction of the cross- section of the leader, so that they are fastened to the flange plates 36a, 36b, 37a, and 37b of the right side beam 36 and the left side beam 37, at the hinge point between them and the web plates 36c and 37c of the side beams. In this way, they constitute stiffeners at the corners of the cross-section of the leader 17, for supporting the corner protrusions 43a, 43b, 44a, and 44b formed by the front beam 36 and the rear beam 35 in the cross-section of the leader 17 and surrounding the corner pieces of the stiffener plates 38. Of the corner protrusions 43a, 43b, 44a, and 44b, the corner protrusions 43a and 43b on the side of the front beam 34 constitute the guide tracks 23 on the leader 17, along which the slide 22 for moving the implement 26 in the longitudinal direction of the leader 17 is arranged to move. Thus, the function of the corner stiffeners 41 a and 41 b is to prevent the compression of the web plate 34c of the front beam and the flange plates 34a and 34b from being compressed by compression forces effective in a direction transverse to the web plate 34c and caused by the slide 22. In this case, the foldingjoint of the leader 17 is placed between the midpoint of the leader and the top of the leader. The first section 28 of the leader is placed on the first side of the folding joint (on the side of the bottom end), and the second section 29 on the second side (on the side of the top end). The first section 28 comprises a fastening point at which the leader 17 is mounted on a base leader 19 mounted on the upper carriage 14 of the frame machine 1 1 , to swivel in the longitudinal direction of the leader 17. The second end of the first section 28 is fastened to the folding joint, via which the first section is connected to the second section 29. The first end of the second section 29 is fastened to the folding joint, and the cathead 24 of the leader is provided at the second end of the second section.

The folding joint is placed outside the right side wall of the leader 17 in such a way that the second section of the leader can swivel with respect to the hinge joint so that the second section can be turned 180° with respect to an axis parallel to the side walls of the leader 17 from the use position to the transport position against the first section.

A first locking device is provided between the first section 28 and the second section 29 of the leader 17, for locking the second section 29 in the use position, and a second locking device is provided for locking the second section 29 in the transport position turned 180°.

Furthermore, the leader 17 comprises an actuator (so-called leader turning cylinder) for turning the leader 17 from the transport position to the use position and from the use position to the transport position again. The leader turning cylinder is placed by the side of the leader 17 so that by moving the movable end of the leader turning cylinder, the second section of the leader 17 can be turned against the first section 28 when the leader 17 is turned to the transport condition.

The leader according to the invention can be implemented, in many respects, in a way different from the example embodiment presented above. In an embodiment, the side walls and the end walls of the leader can be made of two or more sheets designed in a suitable way and formed in the shape of the cross-section shown in Fig. 3, the abutting longitudinal edges being placed against each other and fastened (welded) together. In particular, a leader to be formed of only two sections is suitable as a construction for a smaller leader, because forming very thick steel to provide the cross-section shown in Fig. 3 requires very robust forming equipment, whereby forming the structure by welding e.g. four U-beams together is a more advantageous manufacturing method. Naturally, the cross-sectional shapes of the leader may vary to some extent with respect to the embodiment example presented above; for example, the dimensions of the U-beams may vary. Also, the distance of the hinge joint in the leader from the ends of the leader may vary. Thus, the leader, the pile driving apparatus and the pile driving rig according to the invention are not limited to the embodiment examples presented above, but they may vary within the scope of the appended claims.

Claims

Claims:

1. A leader for a pile driving rig (10), the leader (17) being formed of a hollow box section beam with a primarily H-shaped cross-section, having a front wall (30) with guide tracks (23) for an implement movable along the leader (17), and a rear wall (31 ) with a point for fastening the leader (17) to the pile driving rig (10), as well as side walls (32, 33) between the front wall (30) and the rear wall (31), in which leader (17) for the pile driving rig (10) the side walls (32, 33) of the leader (17) each comprise a U-shaped side beam (36, 37) whose flange plates (36a, 36b, 37a, 37b) extend away from the leader (17).

2. The leader (17) according to claim 1 for a pile driving rig (10), in which leader (17) the front wall (30) is formed by a front beam (34) which has a U- shaped cross-section and whose flange plates (34a, 34b) are connected to the flange plates (36a and 37a) of the side beams (36, 37) on the side of the front beam (34).

3. The leader (17) according to claim 1 or 2 for a pile driving rig (10), wherein the rear wall (31 ) is formed by a U-shaped rear beam (35) whose flange plates (35a, 35b) are connected to the flange plates (36b, 37b) of the side beams (36, 37) on the side of the rear beam (35).

4. The leader (17) according to claim 2 or 3 for a pile driving rig (10), wherein the flange plates (34a, 34b, 35a, 35b) of the front beam (34) and the rear beam (35) are connected at their ends to the ends of the flange plates (36a, 36b, 37a, 37b) of the side beams (36, 37).

5. The leader according to any of the claims 2 to 4 for a pile driving rig (10), wherein at least one stiffening plate (38) is fastened between the front beam (34), the rear beam (35), and the side beams (36, 37).

6. The leader (17) according to any of the claims 2 to 5 for a pile driving rig (10), wherein at least one stiffener (39a, 39b, 40a, 40b) for preventing buckling is fastened to the inner surface of the web plate (34c, 35c) of the front beam (34) and the rear beam (35).

7. The leader (17) according to claim 6 for a pile driving rig (10), wherein the stiffeners (39a, 39b, 40a, 40b) for preventing buckling are elongated plate strips extending in their longitudinal direction from the surface of a first stiffener plate (38) inside the side walls (30, 31 , 32, 33) of the leader (17) to the surface of a second stiffener plate (38) opposite to the surface of the first stiffener plate.

8. The leader (17) according to any of the claims 2 to 7 for a pile driving rig (10), wherein corner stiffeners (41 a, 41 b) are provided between the flange plates (36a, 37b, 37a, 37b) of the side beams (36, 37) and the web plate (34c) of the front beam (34).

9. The leader (17) according to any of the claims 2 to 8 for a pile driving rig (10), wherein corner stiffeners (42a, 42b) are provided between the flange plates (36a, 37b, 37a, 37b) of the side beams (36, 37) and the web plate (35c) of the rear beam (35).

10. The leader (17) according to any of the claims 1 to 9 for a pile driving rig (10), the leader (17) comprising a folding joint between the midpoint and the top end of the leader (17) in the longitudinal direction of the leader (17), whereby a first section (28) of the leader (17) is placed on its first side and a second section (29) of the leader (17) is provided on its second side.

1 1 . The leader according to claim 10, wherein the second section (29) is configured to swivel with respect to the folding joint so that the second section (29) is swivellable from a use position 180° with respect to an axis parallel to the end walls (30, 31 ) of the leader (17) to a transport position against the first section (28).

12. The leader (17) according to claim 7 or 8 for a pile driving rig (10), wherein at least one locking device is provided between the first section (28) and the second section (29), for locking the second section (29) in the use position and the transport position.

13. The leader (17) according to claim 12 for a pile driving rig (10), wherein the leader (17) comprises an actuator for turning the second section (29) of the leader (12) from the use position to the transport position and from the transport position to the use position.

14. A pile driving apparatus (12), the pile driving apparatus (12) comprising a leader (17) according to any of the claims 1 to 10.

15. The pile driving apparatus (12) according to claim 14, which is an impact pile driving apparatus comprising a hammer.

16. The pile driving apparatus (12) according to claim 14, which is an apparatus for the installation of auger drilled piles, comprising a drill motor.

17. A pile driving rig (10), the pile driving rig (10) comprising the pile driving apparatus (12) according to any of the claims 14 to 16.

18. The pile driving rig (10) according to claim 17, wherein the swivelling of the leader (17) from the transport position to the use position is configured to be controlled from the cabin ( 8) of the pile driving rig (10).

19. The pile driving rig (10) according to claim 17 or 18, which is a combined pile driving rig.