DK2925934T3 - Process for making a pile - Google Patents

Description

Description

The present invention relates to a method for the production of a pile, wherein both a drilling and a driving take place.

Piles are used in general for a number of things in the field of construction. In particular in the field of foundation engineering, aside from drilled piles, in particular driven piles are used, with which a driven casing pipe is driven into the subsoil by means of internal and external driving. By way of example, a FRANKIPFAHL® (“FRANKIPFAHL®” is a registered trademark of FRANKI Grundbau GmbH & Co. KG, Seevetal, Germany), as a driven casing pipe, is sunk into the subsoil by means of so-called “internal driving.” The driven casing pipe is aligned thereby, by means of a leader, and is normally connected via two cables to a winch disposed above the head region of the leader, having a first hoist. A pile driver is held in place with another cable, which is likewise guided over the winch in the head region of the leader, said pile driver being inserted in the driven casing pipe, or functioning therein. When a load bearing subsoil has been reached, a closure means serving as a closure for the piling pipe, made for example of granular material, or other material, is driven out by means of the pile driver for forming a pile foot. Additional concrete or suchlike can be added thereby. Subsequently, a reinforcement cage is inserted, concrete is poured in, and the driven casing pipe is removed thereby. It is also possible to implement a so-called gravel initial compression thereby, wherein, at an appropriate level below or above the pile casing depth, the ground is improved by compression with gravel, and is also somewhat compressed.

In differing from the internal driving described above, foot plate-piles, for example, are produced by means of an external driving, wherein, in order to produce said piles, driven casing pipes are used, which are closed at their lower end region by a foot plate that becomes lost, serving as the closure means. Techniques are also known in which the foot plate does not disappear. Using a leader, the driven casing pipe/piling pipe is driven into the subsoil via a pile driver, which can be designed, in particular, as a free-falling pile driver, a diesel pile driver, or a hydraulic pile driver. The pile driver acts thereby on the head of the piling pipe. The driving is conducted as far as the load bearing ground region, as described above for the internal driving. Subsequently, a reinforcing cage is inserted and concrete is poured into the pile shaft while simultaneously, or subsequently, removing the pile pipe in increments. With an external driving, the foot plate may become lost thereby, depending on the technology employed. Concrete slides out of the, now open, bottom of the pile pipe and fills the pile shaft up to approximately the outer edge of the pile pipe. The foot plate, which has disappeared thereby into the ground, can form the support surface for the pile. EP 0 598 457 A1 discloses a method for providing a foundation pile into a ground, free from vibration, as well as a corresponding apparatus. The object would be to provide a method, according to which the bearing capacity of the enlarged pile foot is higher than the bearing capacity of methods known from the prior art, according to which a decimation factor is applied for the theoretical bearing capacity of an enlarged pile foot. In case of the method disclosed there, a drill pipe closed at a lower end by means of a closing element and having a helical winding, is driven into the ground with rotation under axial pressure, until the closing element has penetrated into a bearing ground layer, subsequently increasing the distance between the lower end of the drill pipe and the tip of a closing element attached to it, wherein a prefabricated slender foundation pile is provided in the borehole, the cross section is considerably smaller than that of the drill pipe, whereas the lower end of the foundation pile comes to rest on the closing element, and wherein the closing element is a preformed cylindrical, hollow displacement tip having a length at least twice the outside diameter, wherein said preformed displacement element is arranged at the end of the drill pipe and forms the enlarged pile foot, and wherein the distance of a lower edge of the drill pipe and of the closing element is increased after penetration into a bearing ground layer, wherein the increase of the distance is caused by pressing the pile foot into the bearing ground layer with rotation for a distance of at least twice the outside diameter of the pile base.

With the methods described above, both the internal driving as well as the external driving, the considerable vibrations associated therewith are a disadvantage. In particular in densely constructed areas, this leads to considerable adverse effects in the immediate surroundings.

The object of the invention is to provide a method for manufacturing a pile, with which, in particular, vibrations are reduced.

This object is achieved according to the invention by means of a method for producing a pile, wherein a drill pipe having at least one cutting helix, preferably disposed in a subsection of an outer wall thereof, is drilled into a subsoil until it has reached, in particular, a load bearing subsoil, a pile foot is formed by means of an additional inner pipe, which can be disposed in the drill pipe, at least an end region of the inner pipe is inserted into the pile foot, a granular material having at least one binder is poured in via the inner pipe, and the drill pipe and the inner pipe are removed from the subsoil, wherein the pile foot is formed by internal driving and wherein the inner pipe protrudes over an end side front face of the drill pipe with its end side front face facing the load bearing subsoil.

The drill pipe can also be referred to as an auger with a large hollow stem. Preferably, the drill pipe has a cutting helix disposed over its entire sinkable outer wall. Two, three, or four cutting helixes can be provided thereby. The cutting helix advantageously begins in the lower end region of the drill pipe, on the outer wall thereof. It is preferably located on the outer wall of the drill pipe, directly adjacent to a lower end surface thereof, and runs, to further advantage, to an upper end region of the outer wall of the part of drill pipe that can be sunk, meaning up to an upper end region of the drill pipe beneath an upper opening area, by means of which the drill pipe is attached to a drilling device, in particular a rotating motor, and wherein material can be poured into it through an opening provided there.

The inner pipe, which has no cutting helix on its outer wall, is disposed inside the drill pipe. The ratio of the diameter of the drill pipe to the diameter of the inner pipe, measured in each case on the respective outer walls of the pipes, lies in a range of approx. 1.1:1 to approx. 2.5:1, preferably in a range of approx. 1.25:1 to approx. 1.75:1.

An inner wall of the drill pipe is preferably sealed against the outer wall of the inner pipe with at least one sealing means. The sealing means should serve the function of preventing the ingress of subsoil into the region between the inner wall of the drill pipe and the outer wall of the inner pipe. The sealing means can be implemented, for example, as ring seal, wherein the cross-section of the sealing profile can be implemented in a double swallowtail shape, or single swallowtail shape. Other designs of the sealing means, however, are also an option. The sealing means is advantageously disposed in a fixed manner on the inner wall of the drill pipe, but can also be disposed in a fixed manner on the outer wall of the inner pipe. The sealing means can be made of any possible suitable material, in particular from high-strength plastics, which still exhibits a sufficient elasticity, e.g., filler reinforced rubber materials or suchlike. In particular, numerous sealing means can also be disposed over the length of the drill pipe, or the inner pipe, respectively, on the inner wall thereof, or the outer wall thereof, respectively.

The inner pipe can, already before starting the sinking thereof, extend at an end surface, facing the subsoil, beyond the end surface of the drill pipe, which is likewise facing the subsoil. The excess length between the end surface of the inner pipe and the end surface of the drill pipe is preferably in the range of approx. 20 cm to 200 cm, further preferred, in the range of approx. 50 cm to approx. 120cm, but can also, in some subsoil situations, be greater than 200 cm. The excess length can, however, also be generated after first reaching a final depth in the subsoil through an appropriate displacement of the inner pipe in relation to the drill pipe. The displacement can occur by means of a rotational movement or by means of a longitudinal, non-rotational, sliding movement and/or by means of internal driving or head driving as well. In order to generate an excess length, it may also be provided that the inner pipe is driven as far as a load bearing subsoil by means of internal driving, while the drill pipe is sunk up to a certain depth. The inner pipe and the drill pipe can also be sunk only as far as a load bearing subsoil, for example, and then an excess length can be formed by means of further sinking the inner pipe through internal driving.

The pile foot produced by means of the method according to the invention is produced according to the principle of the FRANKIPFAHL®. According to the invention, the pile foot is formed by means of internal driving, which can also be referred to as inner pipe driving. A head driving by means of hydraulic or diesel pile drivers is also an option. With an internal driving, a pile driver is preferably inserted in the inner pipe, and more preferably, the pile driver is applied to a closure means, which is disposed in the end region of the drill pipe and/or inner pipe facing the load bearing subsoil. The pile driver is advantageously inserted in the tensioned state. The application to the closure means can already occur before the sinking, and more preferably, it occurs during the sinking of the drill pipe, more preferably, an application of the pile driver occurs both before the sinking as well as during the sinking, until a final depth has been reached.

The pile foot is advantageously formed in that granular material present in the inner pipe, which can also be offset with a binder, and is preferably dried concrete, and lastly, can also serve as a closure means, as shall be described below, is compressed by means of an internal driving, or inner pipe driving, wherein, by adding more granular material, the process can be repeated, until the driving has occurred over a desired length, by means of which the length of the pile foot can ultimately be varied or adjusted. Preferably, the pile foot has an outer diameter, which extends beyond the outer wall of the inner pipe, and more preferably also extends beyond the outer wall of the drill pipe. By driving the inner pipe into the pile foot, preferably a pile narrowing directly above and bordering on the pile foot is avoided.

The drilling, preferably as far as a load bearing subsoil, occurs by means of the drill pipe, as specified above, advantageously with the provision of at least one closure means in the end region of the drill pipe and/or inner pipe facing the load bearing subsoil. As a closure means, a foot plate, for example, can be provided thereby, which can be designed as a lost foot plate, but can also be designed as a foot plate that can be recovered. Alternatively, a type of cover can be provided, which, seen in its cross-section, can be regarded as a triangle standing on its head. An alternative closure means is the provision of a plug made of gravel and/or sand and/or a granular material having at least one binder, in particular concrete, in particular dry concrete, by means of which the drill pipe and/or the inner pipe are closed off. Both a foot plate or cover, as well as a plug made of a granular material etc. can also be provided. A foot plate or cover as a closure means are preferably disposed on, in particular attached to, the end region of the drill pipe facing the subsoil. They can additionally be disposed on the end region of the inner pipe, in particular on the terminal end surface thereof. The foot plate, or the cover, respectively, are disposed on the end region of the drill pipe such that they do not extend beyond the outer wall of the drill pipe. The foot plate or cover are knocked away by means of driving, preferably internal driving, through the inner pipe, thus formed or opened as a lost foot plate or cover, in order to then enable a further sinking of the inner pipe and/or the formation of the pile foot.

The pile foot is formed solely by means of the inner pipe. The drill pipe is there in order to introduce a drilling into the subsoil with lowest possible emissions, preferably as far as the load bearing subsoil. The inner pipe thus also substantially determines the diameter of the pile, which basically corresponds to the inner diameter of the inner pipe. Preferably the pile produced with the method according to the invention has a pile diameter having basically the inner diameter of the inner pipe over its entire length. It can, however, also be provided that, for example, the inner pipe is removed from the subsoil in the course of the introduction of material, until its terminal end surface no longer extends beyond that of the drill pipe, such that then an expansion of the pile diameter can occur at this point, in particular when the inner pipe is fully removed from the subsoil, while the drill pipe remains therein, and material is then poured in via said drill pipe, in order to form the pile. A pile can advantageously be produced at a high speed with only limited vibrations by means of the method according to the invention, having a load bearing capability that is nearly identical, or similar, to a FRANKIPFAHL. The major advantage with respect to a FRANKIPFAHL is that this pile, due to the complete displacement thereof, by means of driving the piling pipe, has a long driving time and a high level of vibrations. In comparison with known drilled piles, such as the VB pile or the SOB pile, a significantly increased load bearing capacity is obtained. The low vibrations are obtained by means of a depth driving, because the pile driver functions by means of an internal driving or head driving in the region of the final depth and/or not at the start of the sinking procedure, in any case beneath ground level, at which it is sunk.

The sinking occurs by means of screwing the drill pipe into the ground, as far as a particularly load bearing subsoil. Advantageously, the inner pipe, together with the drill pipe, is inserted as far as the subsoil thereby. It is particularly preferred thereby that the inner pipe be turned during the introduction thereof. It is further preferred that the turning occur during the drilling movement of the drill pipe. Advantageously, a control is provided there, such that the turning movement of the drill pipe and the inner pipe are synchronized to one another. Preferably, the inner pipe has no drive during the drilling procedure, when being sunk, that generates a torque, which is then transferred from the inner pipe to the ground in question. On the other hand, the inner pipe can be provided with a drive during the removal from the subsoil. A synchronization of the inner pipe (turning, sliding, pushing, vibrating, etc.) during the sinking preferably occurs through the movement of the drill pipe. Alternatively, it can also be provided that the inner pipe is securely held by the drill pipe via the sealing means, and when establishing an excess length prior to the sinking, then, without the need of an additional control, due to the synchronization via the sealing means, the inner pipe, turning together with the drill pipe, is advanced into the subsoil.

Advantageously, rinsing agents are introduced through the inner pipe, e.g., bentonite suspensions, water or suchlike. The sinking can be accelerated, and the pile load bearing behavior can also be improved by means of the rinsing agents, which are introduced into the inner pipe and/or drill pipe via an upper opening in the inner pipe and/or the drill pipe, by means of hoses, for example, and can exit via holes provided in the wall of the inner pipe. As long as the material used as a rinsing agent also contains a binder, the surrounding soil can furthermore be solidified. The rinsing agents can be used during the sinking as well as upon and after reaching the final depth and the subsequent removal of the drill pipe and the inner pipe from the subsoil.

As an alternative to a turning of both the drill pipe and the inner pipe during the sinking, it may be provided that only the drill pipe is turned, and the inner pipe is held in place, and is fed further into the drill pipe as it continues to sink. The inner pipe can be attached to a leader for this purpose, which extends out of the drill pipe, above the drill pipe. By way of example, it is possible to proceed thereby, such that the drill pipe is provided with a closing means, and the inner pipe is disposed in its lower end region via a sealing means between the outer wall of the inner pipe and the inner wall of the drill pipe, wherein, however, the sealing means does not transfer the turning movement of the drill pipe to the inner pipe, because it is not sufficiently securely disposed thereon. The inner pipe can also be synchronously moved with, or subsequently guided into, the drill pipe during the sinking, above the at least one sealing means, for example, and, upon first reaching the final depth, be moved toward the load bearing subsoil, in order to obtain the excess length in relation to the drill pipe, such that then, subsequently, the at least one sealing means is brought to rest against the outer wall of the inner pipe. The inner pipe and/or the drill pipe can, moreover, also have spacing means and guidance means disposed on their outer walls, which facilitate a guidance of the inner pipe into the drill pipe.

The pile foot can be produced in accordance with the method according to the invention, without such an excess length between the end surface of the inner pipe and the end surface of the drill pipe being provided, but it can also be generated when there is an excess length of the inner pipe. Following the formation of the pile foot, preferably by compression, the excess length between the end surface of the inner pipe and the end surface of the drill pipe is then either increased, or retained, and the inner pipe is inserted into the pile foot, optionally while also displacing the drill pipe along with it, or it is guided into the pile foot through the formation of the excess length of the inner pipe. The insertion of the inner pipe into the pile foot can occur in a turning manner, or through a longitudinal sliding movement of the inner pipe toward the pile foot, through driving, for example. In a further preferred embodiment of the present invention, not only the inner pipe, but also the drill pipe can be slid, preferably, into the pile foot, preferably by means of a turning movement. The insertion of the inner pipe into the pile foot advantageously occurs at least so far that the end surface of the drill pipe lies on the surface of the pile foot.

The removal of the drill pipe and the inner pipe from the subsoil can occur in a variety of ways. Preferably the removal occurs by means of pulling and/or turning the drill pipe and/or the inner pipe. Advantageously, the inner pipe is removed from the subsoil together with the drill pipe, in particular, it is pulled therefrom. It can, however, also be provided that the inner pipe first remains in the ground, while the drill pipe is removed from the subsoil by pulling or turning. Lastly, it can also be provided that the inner pipe is removed first, while the drill pipe remains in the ground. Advantageously, the removal of the inner pipe and/or the drill pipe occurs during the pouring of the granular material having at least one binder, preferably concrete. The material, in particular liquid concrete, is introduced as far the pile foot thereby, and forms the pile.

Advantageously, a reinforcing cage is placed in the inner pipe, or the drill pipe, respectively, during or prior to the pouring of the granular material having at least one binder. The reinforcing cage is advantageously placed in the inner pipe or the drill pipe before starting to pour the granular material having at least one binder, which is preferably concrete.

The removal of the drill pipe and the inner pipe can occur thereby, such that the excess length of the inner pipe remains intact during the removal. The excess length can, however, also be reduced or eliminated, for example, during the removal, by means of an additional displacement of the inner pipe in relation to the drill pipe toward a ground surface, as far as both are removed from the subsoil, such that an end surface of the inner pipe ends up at least at the same level as an end surface of the drill pipe, or, however, is disposed even with an offset inside the drill pipe. The drill pipe can be removed from the subsoil by pulling or by turning, as is likewise the case for the inner pipe. The different options described above, for the removal of the drill pipe and the inner pipe, make it possible to implement different pile diameters.

Piles having no weaknesses above the pile foot are made available by means of the method according to the invention. Furthermore, depending on the subsoil conditions, different shaft diameters can be generated, such as a larger diameter in the region close to the surface, and a smaller diameter in the region above the pile foot, in order to make economical use of the energy and material input. A gravel initial compression is also possible with the method according to the invention.

Moreover, according to the invention, the inner pipe can have an expansion in its lower end region, facing the subsoil. This expansion can also serve as a guidance for the inner pipe in the drill pipe. In particular, when an excess length between the inner pipe and the drill pipe is already provided prior to the sinking, the expansion of the inner pipe can also be identical to the outer diameter of the drill pipe, or can extend beyond this diameter. As a result of the expansion, a broadened pile diameter can be obtained when pouring the granular material having at least one binder into the inner pipe when said inner pipe has been removed from the load bearing and non-load bearing subsoil, regardless of whether it is pulled or turned. Furthermore, the connection of the pile to the pile foot is improved by this means. Advantageously, with a design of this type, the drill pipe is first removed from the subsoil, either by pulling or turning, preferably pulling, and subsequently, the inner pipe is removed.

It may be fundamentally provided, as set forth in the present invention, that, for the removal of the drill pipe and the inner pipe from the subsoil, during the removal of the drill pipe from the subsoil, the removal of the inner pipe from the subsoil occurs with a temporal offset, but in subsections at the same time, or the sequence can be reversed.

The method according to the invention can be applied with a device for producing a drilled pile with a pile foot, comprising a drill pipe and an inner pipe disposed therein, wherein at least one sealing means is disposed between the outer wall of the inner pipe and the inner wall of the drill pipe, for preventing an ingress of non-load bearing and/or load bearing subsoil. The device according to the invention also advantageously exhibits an excess length between an end surface of the inner pipe and an end surface of the drill pipe, such that the inner pipe extends beyond the drill pipe, facing toward the subsoil. The sealing means can be formed, as has already been depicted above in conjunction with the method according to the invention. The inner pipe is advantageously attached above the upper edge of the drill pipe by means of a retaining device, preferably a leader. The drill pipe can be designed, in the device according to the invention, as depicted in conjunction with the method according to the invention, and in particular, such that it has at least one cutting helix. Closing means can also be provided, in the form of disappearing or retained foot plates, which are attached to the drill pipe, or in the form of a plug, as has likewise been described in conjunction with the method according to the invention.

These and other advantages of the present invention shall be explained in greater detail based on the following Figures 1A, 1 B/C and 1D/E, which show five method states A, B, C, D and E.

First, it should be noted that the design of the method according to the invention and the device according to the invention depicted in the figures is not to be understood as limiting. Rather, the features described therein can be combined with one another, and with the features described above, to form further designs. Furthermore, it should be noted that the reference symbols given in the description of the figures do not limit the scope of protection for the present invention, but rather, should only pertain to the embodiment examples shown in the figures. Identical parts or parts having identical functions have the same reference symbols in the following. In particular, it should be noted that the method according to the invention shown in the figures, using an internal driving, represents only one possible design, and that the coordinated sinking and removal of a drill pipe with an inner pipe, as shown in the embodiment example, is only one of the possible designs of the present invention.

Fig. 1 A shows, in section A, a device 10 according to the invention, with which an inner pipe 14 is disposed in a drill pipe 12. The drill pipe 12 and the inner pipe 14 are attached to a leader 20. A pile driver 22 is located in the inner pipe 14, held by means of a cable 24 on the leader 20 via a winch, not shown here, and lies against a closure means 28, designed as a plug formed, for example, from gravel or dry concrete. The drill pipe 12 has an outer wall 13, on which a cutting helix 18 is disposed, which is disposed, starting from an end surface 52, on the outer wall 13, up to the upper region beneath the attachment of the drill pipe 12 to the leader 20. The closure means 28 is disposed in the lower end region of the drill pipe 12, and can, alternatively or in addition thereto, be designed as a plate or cover.

The device 10 is placed on a ground surface 60. A groundwater table 30 is located beneath the ground surface 60, in a non-load bearing subsoil 32, and load bearing subsoil 34 is located beneath the non-load bearing subsoil 32.

In Fig. 1 B/C the drill pipe is sunk, while turning, into the subsoil 32, and 34, respectively, wherein the turning movement is indicated by the arrows 36.1 and 36.2. The inner pipe 14 is synchronously moved, without a drive, by the drill pipe 12, and moreover, is protected by means of a sealing means 16, preferably in the form of a ring, disposed between an outer wall 17 of the inner pipe 14 and an inner wall 11 of the drill pipe 12, from the ingress of subsoil 32, 34 in the region between the outer wall 17 of the inner pipe 14 and the inner wall 11 of the drill pipe 12.

The pile driver 22 furthermore rests against the plug 28. When a final depth has been reached in the load bearing subsoil 34, a pile foot 46 is formed by means of the pile driver 22 in the form of a deep driving, in the direction of the arrows 38, as is shown in section C in the Fig. 1 B/C. If a plate or cover is provided, alternatively or in addition thereto, as the closure means 28, this is knocked away by the driving. A condensed ground area 56 is formed around the pile foot 46 during the sinking of the drill pipe with the inner pipe (see section D, Fig. 1 D/E).

For the production of the pile foot, dry concrete, for example, can also be poured into the inner pipe 14, repeatedly as well, which is then compressed with the material of the plug 28, if such is present, and forms the pile foot 46. After the pile foot 46 has been compressed, the inner pipe 14 is driven into the pile foot 46, until an excess length is formed between the end surface 54 of the inner pipe 14 and the end surface 52 of the drill pipe 12, which amounts, for example, to 100 cm. Subsequently, the pile driver 22 is removed from the inner pipe 14, and a granular material having at least one binder, in particular liquid concrete 44, for example, symbolized by the arrow, is poured into the inner pipe 14 and/or the drill pipe 12, as far as the pile foot 46. A reinforcement cage 42 can be placed in the drill pipe 12 or the inner pipe 14, as is shown in section D of Fig. 1 D/E, prior to pouring the concrete 44, or at the same time as, or during, the pouring of the concrete 44 into the drill pipe 12 or the inner pipe 14.

During the pouring of the concrete, the drill pipe 12 is removed from the subsoil 32, 34, in the direction of an arrow 40, together with the inner pipe 14, as is shown in section D of Fig. 1 D/E, such that a pile 50 is formed, as is shown in section E of Fig. 1 D/E. This pile has a pile foot 46, which transitions into a pile shaft 51, without any weakening above the pile foot 46.

Claims (14)

A method of making a pile (50) wherein a drill pipe (12) having at least one helical insert (18) disposed on a lower portion of an outer wall (13) is drilled into a subsoil (34 ), and by means of an inner tube (14) arranged in the drill pipe (12), a pile foot (46) is formed, where at least one end region (15) of the inner tube is inserted into the pile foot (46) and where via the inner tube ( 14) at least one binder containing granular material (44) is filled in, and the drill pipe (12) and the inner tube (14) are removed from the subsoil (32, 34) and the pile foot (46) is placed by inner frame and where the inner tube (14) has its end surface (54) facing the sustainable surface (34) projecting beyond an end surface (52) provided at the end of the drill pipe (12) and the inner tube (14) being retracted into the pile foot (46). Method according to claim 1, characterized in that said removal is carried out by pulling and / or turning (40) of the drill pipe (12) and / or the inner pipe (14). Method according to one of the preceding claims, characterized in that an outer wall (17) of the inner tube (14) is sealed against an inner wall (11) of the drill pipe (12) with at least one sealing means (16). Method according to one of the preceding claims, characterized in that, for the purpose of internal framing, a pile-ramping means (22) is inserted into the inner tube (14). Method according to one of the preceding claims, characterized in that the drill pipe (12) has at least one closing member (28) at an end region (48) facing the sustainable substrate (34). Method according to one of the preceding claims, characterized in that the inner tube (14) and the drill pipe (12) are inserted into the pile foot (46). Method according to one of the preceding claims, characterized in that the drill pipe (12) and / or the inner pipe (14) is provided with a plug (28) of coffin and / or sand and / or a grainy material containing at least one binder. . Method according to claim 7, characterized in that a pile dropping device (22) is applied to a plug (28). Method according to one of the preceding claims, characterized in that the inner tube (14) 1] is removed from the subsurface (32, 34) together with the drill pipe (12). Method according to one of the preceding claims, characterized in that the removal of the inner tube (14) and / or the drill pipe (12) is carried out during the filling of the granular material (44) containing at least one binder. Method according to one of the preceding claims, characterized in that the inner tube (14) is brought down into the sustainable substrate (34) together with the drill pipe (12). Method according to one of the preceding claims, characterized in that the inner tube (14) is rotated during the downpour. Method according to claim 12, characterized in that the rotation is made during the drilling movement of the drill pipe (12). Method according to one of the preceding claims, characterized in that rinsing aids are supplied through the inner tube (14).