Method and device for installing partition walls in a soil

Abstract

Described is a formwork segment (100) comprising: a hollow form part (110) with vertical wall parts (111, 112) and a filling space (113) therebetween, and first and second, mutually complementary, coupling parts (130, 150) on either side of the hollow form part (110), wherein the coupling parts of different formwork segments are able to cooperate to form a sliding lock. A method for making a partition wall in a soil, comprises the steps of longitudinally pressing successive formwork segments into the soil, wherein the coupling parts of adjacent formwork segments always form a sliding lock, wherein the formwork segments are always filled with liquid concrete, after which the formwork segments are successively removed and the liquid concrete always merges with the concrete from a previously removed adjacent formwork segment.

Description

[0001] Method and device for installing partition walls in a soil

[0002] FIELD OF INVENTION

[0003] The invention generally relates to the upright installation of form parts in a soil. The invention particularly relates to the installation of partition walls in a soil, and the invention will be explained below specifically for this exemplary embodiment. However, the principles of the present invention are also applicable more generally to the installation of upright form parts in a soil and / or to the upright installation of form parts in a soil.

[0004] BACKGROUND OF THE INVENTION

[0005] In the following, the term "partition wall" will be used to indicate soil-retaining and / or water-retaining constructions in a soil. These constructions have the function, among other things, of keeping the soil in place and / or of preventing or at least reducing the passage of water.

[0006] An example of an application situation is the creation of a construction pit; the partition wall then serves to prevent the walls of the pit from collapsing. First, the partition wall is installed, then the soil on one side of the partition wall is dug away.

[0007] Another example of an application situation is improving the water tightness and stability of a dike.

[0008] Another example of an application situation is reinforcing or maintaining the quay in place, for example, in a harbour or a lock, or reinforcing or maintaining the bank of a canal or river in place.

[0009] SUMMARY OF THE INVENTION

[0010] For such partition walls, the well-known steel sheet pile profiles with a trapezoidal profile are typically used. A profile is positioned vertically above the soil with its lengthwise direction, and then pressed down into the soil. Depending on the composition of the soil, this is easy or difficult. The sheet pile profiles, positioned adjacent to each other, interlock and thus form a wall.

[0011] As a variant, it is known to use prefabricated sheet pile sections. These are wall sections with a larger horizontal extension than the standard sheet pile profiles, and they can be made of concrete, for example. For pressing down, a vertically downward force is applied to the profile. This can be done in a thrustwise manner (piling), but also by a continuous force in combination with vibrations can be applied.

[0012] These techniques cause a lot of nuisance in the environment and are therefore difficult to apply in situations with, for example, buildings (houses, offices, shops, etc.) in the immediate vicinity. The nuisance consists mainly of noise pollution and vibrations propagating through the soil, which can even cause damage to the buildings and / or interior.

[0013] Techniques are known wherein the object to be pressed into the soil is brought into resonance. This causes less nuisance to the environment, but requires the use of vibratory machines that can generate sufficiently high frequencies, and computer equipment that can accurately calculate the required frequency and control the vibratory machines accordingly.

[0014] A primary object of the invention is to enable a partition wall to be installed without causing such vibrations propagating through the soil.

[0015] For this purpose, a method, proposed by the present invention, has the following features:

[0016] 1 ) hollow formwork segments are used;

[0017] 2) a formwork segment is always individually pushed into the soil;

[0018] 3) to this end, the surrounding soil is liquefied to reduce the resistance of the soil, such that the formwork segment can be pushed down without vibration;

[0019] 4) a reinforcement is placed in the formwork segment, and subsequently the formwork segment is filled with concrete;

[0020] 5) adjacent to the filled first formwork segment, a second formwork segment is placed by repeating steps 2 and 3;

[0021] 6) the second formwork segment is filled with concrete by repeating step 4;

[0022] 7) the first formwork segment is then pulled up and removed; in doing so, the still liquid concrete sinks into the space created and merges with the still liquid concrete of a previous formwork segment;

[0023] 8) the previous steps are repeated continuously, wherein a pulled-up formwork segment can be reused, such that a total of two or three formwork segments may be sufficient to carry out the method. SHORT DESCRIPTION OF THE DRAWINGS

[0024] These and other aspects, features and advantages of the present invention will be further clarified by the following description of one or more exemplary embodiments with reference to the drawings, wherein like reference numerals indicate like or similar parts, wherein designations "bottom / top", "higher / lower", "left / right" etc. relate exclusively to the orientation shown in the figures, and wherein:

[0025] Figure 1 schematically shows a horizontal cross-section of an example of a formwork segment;

[0026] Figures 2A-2C show some variants of the formwork segment;

[0027] Figures 3A-3F illustrate successive steps of a method for using the formwork segments;

[0028] Figure 4 schematically illustrates an apparatus for inserting formwork segments.

[0029] DETAILED DESCRIPTION OF THE INVENTION

[0030] Figure 1 schematically shows a horizontal cross-section of an example of a formwork segment 100 according to the present invention. The vertical longitudinal direction of the formwork segment 100 is perpendicular to the plane of the drawing. The formwork segment 100 comprises, in horizontal succession, a form part 110 flanked by two mutually complementary coupling parts 130 and 150.

[0031] The form part 110 comprises two substantially parallel, vertical wall parts 111 and 112, which are placed at a distance from each other and define a filling space 113 therebetween. The wall parts can be configured, for example, as steel plates. On the sides, the filling space 113 is closed off by the coupling parts 130 and 150. On the bottom, the filling space 113 is closed off by a base plate that is not visible in the figure.

[0032] The first coupling part 130 comprises an outwardly concave coupling wall 131 which, in the embodiment shown, closes off the filling space 113 and which defines, on its side facing away from the form part 110, a longitudinal gutter 132, also referred to as a C-profile, with a longitudinal side opening 133.

[0033] The second coupling part 150 comprises an outwardly convex coupling wall 151 which defines, on its side facing the form part 110, a longitudinal cavity 152 which connects to the filling space 113, and which defines, on its side facing away from the form part 110, a bulge 153 which is thickened relative to the walls 111 , 112, which will also be referred to as a mushroom profile. The convex coupling wall 151 of the second coupling part 150 has a contour and dimension that corresponds to the contour and dimension of the concave coupling wall 131 of the first coupling part 130. Said contour can have the shape of a part of a circle, as shown, but other shapes are also possible. It is important that the bulge 153, and therefore also the gutter 132, has a transverse dimension D that is larger than the width of the side opening 133.

[0034] It is noted that the form part 110 has the cross-section shown over substantially its entire vertical length.

[0035] The first and second coupling parts 130 and 150 are adapted to cooperate with respective second and first coupling parts 150 and 130 of other identical formwork segments. As will be described in more detail later, a first formwork segment 100 is positioned vertically, and then a second formwork segment 100 is positioned adjacent to the first formwork segment, wherein the gutter 132 of the concave coupling wall 131 of the second formwork segment 100 is fitted around the bulge 153 of the convex coupling wall 151 of the first formwork segment 100, as shown in dotted lines, wherein said bulge 153 is unable to protrude laterally from said gutter 132.

[0036] It should be noted that it is also possible to place the second formwork segment on the left side of the first formwork segment, in which case the bulge 153 of the second formwork segment fits into the gutter 132 of the first formwork segment.

[0037] Gutter 132 (C-profile) and bulge 153 (mushroom profile) always work together as a sliding guide when placing a subsequent formwork segment adjacent to a preceding formwork segment, such that the subsequent formwork segment is always positioned correctly with respect to the preceding formwork segment. The sliding guide offers axial (vertical) freedom of movement, but prevents mutual movements in the horizontal direction because one component (bulge 153) is locked in the other component (gutter 132). This combination is therefore also referred to as a sliding lock.

[0038] In the example shown, the gutter 132 of the first coupling part 130 and the bulge 153 of the second coupling part 150 are aligned with each other. When two (or more) mutually identical formwork segments 100 are coupled with each other, they will be in the same plane. It may be desirable to make an angle of 90°, for example; for this purpose, the gutter 132 and / or the bulge 153 may have a different orientation, as illustrated by way of example in Figures 2A-2C. In the example shown, the form part 110 has the shape of a trapezium. A finally formed partition wall will then have a wave shape with sharp corners. As variations, the form part can have smoother corners, multiple corners, fewer corners, or even be free of corners.

[0039] After a formwork segment 100 has been positioned, the filling space 113 is filled with concrete. It is preferred that first a reinforcement 120 is placed in the filling space 113. Figure 1 shows that a reinforcement 120 may comprise vertical reinforcement bars 121 and horizontal reinforcement bars 122, which are attached to each other to form a cage. Alternatively, the reinforcement 120 may already be inserted before the formwork segment 100 is positioned. The mutual distances between the reinforcement bars are sufficiently large to allow liquid concrete to flow freely through the meshes of the reinforcement cage.

[0040] After filling, or at least after the formwork segment 100 is partially filled, the formwork segment 100 is pulled up to remove it. In this process, the aforementioned base plate remains behind. Furthermore, the reinforcement 120 remains behind. After removal, the formwork segment 100 can be reused.

[0041] Pulling up the formwork segment 100 is done while the concrete is still sufficiently liquid. The concrete then flows into the space freed up by the formwork segment 100. This primarily concerns the space that was occupied by the wall sections 111 , 112. Because the liquid concrete is now no longer laterally confined by the formwork segment 100, the concrete could even flow further to the side if there would be space between the formwork segment 100 and the surrounding soil, or if that surrounding space is filled with a liquid material; under normal circumstances, however, the soil is firm enough to prevent the concrete from flowing away.

[0042] In principle, it is possible for the formwork segment 100 to have a relatively short length, and to be pulled up during filling. However, it is preferable for the formwork segment 100 to first be completely filled with concrete and only then, optionally taking into account some waiting time, to be pulled up. The height of the final concrete wall to be formed can then be slightly lower than the length of the formwork segment 100 because the concrete fills the space that is left free by the formwork segment 100. This can be taken into account by choosing the length of the formwork segment 100 to be greater than the desired height of the final concrete wall to be formed. It is also possible to compensate for the subsidence of the concrete during the pulling up of the formwork segment by topping up with liquid concrete. An important aspect of the present invention is that the concrete also merges with the concrete of the adjacent formwork segments, as illustrated in Figures 3A-3F, wherein only the second coupling part 150 of a preceding formwork segment 100 (here designated 150A and 100A respectively) and the first coupling part 130 of a subsequent formwork segment 100 (here designated 130B and 100B respectively) are shown; the reinforcement 120 is not shown for the sake of simplicity.

[0043] Figure 3A shows, as a first step in a method of installing a partition wall, the preceding formwork segment 100A with its filler space 113A still empty.

[0044] Figure 3B shows, as a second step in the method, that the filling space 113A of the previous formwork segment 100A is filled with concrete 160A.

[0045] Figure 3C shows, as the third step in the method, that the next formwork segment 100B has been placed; its filling space 113B is empty.

[0046] It should be noted that the second and third steps can also be performed in the reverse order: first placing the next formwork segment 100B, then filling the previous formwork segment 100A.

[0047] Figure 3D shows, as the fourth step in the method, that the previous formwork segment 100A has been removed, and that the concrete 160A has flowed out of the filling space 113A of the previous formwork segment 100A to the coupling wall 131 B of the next formwork segment 100B.

[0048] Figure 3E shows, as the fifth step in the method, that the filling space 113B of the next formwork segment 100B is filled with concrete 160B. This fifth step corresponds to the second step, wherein the next formwork segment 100B has taken the place of the previous formwork segment 100A.

[0049] It should be noted that the fourth and fifth steps can also be performed in the reverse order: first filling the next formwork segment 100B, then removing the previous formwork segment 100A.

[0050] Figure 3F shows, as the sixth step in the method, that the next formwork segment 100B has been removed, and that the concrete 160A of the preceding formwork segment 100A and the concrete 160B of the subsequent formwork segment 100B touch each other. These two concrete masses 160A and 160B will flow into each other and form a whole after curing. After curing, the concrete masses 160A and 160B may be referred to as respective wall segments 260A and 260B, which are integral parts of a partition wall 200. The steps described above are the relevant steps for a single meeting point between two adjacent wall segments 260A and 260B. However, wall 200 has multiple wall segments, and the steps described will also be performed for other wall segments. It will be clear that the steps described above are then repeated cyclically. This can be done with a total of two formwork segments: whenever a previous formwork segment 100A is removed (Figure 3D), it can be used to be placed adjacent to the subsequent formwork segment 100B, and thus take on the function of the "next" formwork segment (Figure 3C). In this way, it is possible to form an integral partition wall step by step using only two formwork segments, which can be identical to each other. Each time, a first formwork segment is filled and, after placing a second formwork segment, it is removed and then positioned adjacent to the second formwork segment as a third formwork segment.

[0051] However, it is also possible to use multiple formwork segments, such that each formwork segment remains in place longer before being removed and reused as the next segment. For example, if three formwork segments 100A, 100B, 100C are used, the following steps can be performed:

[0052] 1) placing 1 st segment 100A;

[0053] 2) filling up completely 1 st segment 100A;

[0054] 3) placing 2nd segment 100B adjacent to 1 st segment 100A;

[0055] 4) filling up completely 2nd segment 100B

[0056] 5) placing 3rd segment 100C adjacent to 2nd segment 100B;

[0057] 6) filling up completely 3rd segment 100C

[0058] 7) removing 1 st segment 100A, and placing as 4th segment adjacent to 100C

[0059] 8) filling up completely 4th segment 100A;

[0060] 9) removing 2nd segment 100B, and placing as 5th segment adjacent to 100A etc.

[0061] In that case, a formwork segment is always filled immediately after it has been placed, the formwork segment is left filled for as long as possible, and it is only removed when it is needed again to be placed as the next formwork segment. Such a procedure is also possible with four or more formwork segments. Such a procedure is also possible in the case of two formwork segments, which then amounts to switching the order of the steps in Figures 3D and 3E. Such a procedure will be preferred if it is desired to let the concrete rest as long as possible before removing the supporting formwork.

[0062] Alternatively, it is possible to perform the following steps:

[0063] 1) placing 1 st segment 100A;

[0064] 2) placing 2nd segment 100B adjacent to 1 st segment 100A;

[0065] 3) filling up completely 1 st segment 100A;

[0066] 4) placing 3rd segment 100C adjacent to 2nd segment 100B;

[0067] 5) filling up completely 2nd segment 100B;

[0068] 6) removing 1 st segment 100A, and placing as 4th segment adjacent to 100C;

[0069] 7) filling up completely 3rd segment 100C;

[0070] 8) removing 2nd segment 100B, and placing as 5th segment adjacent to 100A

[0071] 9) filling up completely 4th segment 100A; etc.

[0072] Where in this document reference is made to filling up completely of a segment, it is also to be understood that a segment can be filled at least partially and preferably completely of the respective segment.

[0073] In this case, a formwork segment is only filled when the next segment has been placed.

[0074] Depending on the consistency of the concrete used, it may be preferable to remove a formwork segment as soon as possible after filling. However, in that case, the respective formwork segment can always be reused immediately, and there is little reason to use multiple formwork segments, unless it is necessary to clean the formwork segments before reusing them.

[0075] An important aspect of the present invention thus involves the use of elongated, hollow formwork segments which vertically slidingly interlock for good positioning, which are individually filled with concrete, and which are then vertically slidingly removed while the concrete is still liquid, wherein the concrete from adjacent formwork segments flows into each other to form a whole.

[0076] In the foregoing, the interlocking coupling parts have been shown with a circular profile, but alternative shapes are possible, for example triangular, quadrangular, polygonal. In the foregoing, the invention has been explained for the example of partition walls, wherein the walls to be formed have the characteristic trapezoidal profile of sheet piles, and where the form parts 110 of the formwork segments 100 also have a trapezoidal profile. However, the invention can also be used for making form parts with a different profile. For example, the form parts 110 of the formwork segments 100 can have a completely flat profile, for forming completely straight partition walls. It is also possible, for example, that the form parts 110 of the formwork segments 100 form a cylindrical or annular mould, for forming a cylindrical form part, solid or hollow.

[0077] Furthermore, successive use of formwork segments with mutually different profiles is possible. For example, it is possible to successively use a formwork segment with a cylindrical or annular form part and a formwork segment (or multiple formwork segments) with a completely flat form part, in order to form a flat wall with reinforcing columns.

[0078] Another important aspect of the present invention concerns the vibration- free positioning of the formwork segments. In principle, it is possible to apply the formwork segments, proposed by the present invention and the described method, in a soil consisting of sand, clay, etc., using conventional methods such as pile driving and vibration, but the present invention proposes a vibration-free method, without noise nuisance and vibration nuisance for the environment. A further advantage of this insertion method is that the formwork segments experience much less resistance during insertion and are therefore much less subject to wear. Furthermore, the formwork segments can therefore be made much lighter.

[0079] Figure 4 schematically illustrates an apparatus 1000 for inserting the formwork segments 100. The apparatus 1000 comprises a frame 1100, which is provided with clamping means 1200 for engaging the upper end of a formwork segment 100. The frame 1100 is configured to cooperate with an external machine which can exert a downward force on the frame 1100 to push the formwork segment 100 down into the soil, and to (later) exert an upward force on the frame 1100 to pull the formwork segment 100 up out of the soil. Said external machine can be a standard machine and is not shown for the sake of simplicity.

[0080] The frame 1100 further comprises at least one pumping unit 1300. The pumping unit 1300 comprises one or more drill pipes (or pipe drills) 1310 extending substantially vertically downward along the formwork segment 100, only one of which is shown in the figure. The drill pipe 1310 is provided with outlet openings 1320 at its lower end. The drill pipe 1310 has a longitudinal body axis 1311 , and is rotatably mounted relative to the frame 1100 with respect to its body axis 1311. The pumping unit 1300 further comprises a motor drive 1330 which engages the drill pipe 1310 to cause it to rotate about its body axis 1311. The rotational movement may be, for example, a continuous movement in one direction, or a reciprocating rotational movement in two directions.

[0081] Figure 4 further shows a storage 1400 for a liquid medium 1401 , and a supply line 1410 connecting the storage 1400 to the frame 1100. The storage 1400 and the supply line 1410 may be part of the apparatus 1000, or they may be a separate component that cooperates with the apparatus 1000.

[0082] The supply line 1410 connects to an upper end of the drill pipe 1310. The liquid 1401 is pumped from the supply line 1410 down through the drill pipe 1310. For this purpose, the apparatus 1000 may be provided with a medium pump 1340 mounted to the frame 1100. Alternatively, or additionally, the storage 1400 may be provided with a medium pump, or a separate pump may be included in the supply line 1410.

[0083] The operation of the apparatus 1000 is as follows. When the apparatus 1000 is used to push down the formwork segment 100, the motor drive 1330 is activated to rotate the drill pipe 1310, and the medium pump 1340 and / or 1420 is activated to pump liquid medium 1401 down through the drill pipe 1310. The drill pipe 1310 bores into the soil, and the liquid medium 1401 exits the pipe 1310 through the outlet openings 1320 at the lower end of the pipe 1310, which is located approximately level with, or slightly lower than, the lower end of the formwork segment 100. The liquid 1401 flowing from the outlet openings 1320 has an erosive and fluidizing effect on the surrounding soil; the fluidized soil offers little or no resistance to the downward moving formwork segment 100.

[0084] The erosive and fluidizing effect of the medium, flowing from the outlet openings 1320, has a range that will depend, among other things, on the flow velocity and the throughput of the medium, which in turn will depend on the pump power used. Typically, this range can be characterized by a circle whose centre coincides with (the axis of rotation of) the pipe 1310. It is possible that only a single pumping unit 1300 is used, which must then be so powerful that the entire formwork segment 100 falls within its range. In that case, however, an excessively large volume of soil is fluidized outside the formwork segment 100, which requires quite a lot of energy. It is therefore more efficient to use multiple pumping units 1300 that are distributed adjacent to the formwork segment 100. Figure 5 shows a cross-section, similar to Figure 1 , wherein positions of three drill pipes 1310 and the associated ranges 1312, relative to the profile of the formwork segment 100, are schematically shown by way of example. The three drill pipes 1310 can be associated with three different pumping units 1300, or with a single common pumping unit 1300. It can be seen that with smaller ranges, and therefore with smaller pumps, the entire footprint of the formwork segment 100 can still be covered.

[0085] It should be noted that, in the case of multiple pumping units 1300, a common storage 1400 can be used.

[0086] The liquid medium 1401 may be water in a simple implementation. Preferably, however, the liquid medium 1401 is a curing substance. By way of suitable examples, the following are mentioned: grout, that is, a mixture of water and cement and optionally other additives; mortar, that is, a mixture of grout and sand; concrete, that is, a mixture of mortar and gravel; a clay, such as bentonite, optionally mixed with cement; a chemical binder, for example water glass and a curing agent.

[0087] During the positioning of the formwork segment 100, the environment of the formwork segment 100 behaves like a liquid, such that the positioning is quite easy. Once the formwork segment 100, after being filled with concrete, is removed and the pumping units 1300 are also removed, the medium 1401 , now mixed with soil, will cure, thus contributing to the strength and integrity of the formed concrete partition wall.

[0088] In summary, the invention concerns a formwork segment 100 comprising: a hollow form part 110 with vertical wall parts 111 , 112 and a filling space 113 therebetween, and first and second, mutually complementary, coupling parts 130, 150 on either side of the hollow form part 110, wherein the coupling parts of different formwork segments are able to cooperate to form a sliding lock.

[0089] A method for making a partition wall in a soil, comprises the steps of longitudinally pressing, preferably successive, formwork segments into the soil, wherein the coupling parts of adjacent formwork segments always form a sliding lock, wherein the formwork segments are always filled with liquid concrete, after which the formwork segments are successively removed and the liquid concrete always merges with the concrete from a previously removed adjacent formwork segment.

[0090] It will be clear to a person skilled in the art that the invention is not limited to the exemplary embodiments discussed above, but that various variants and modifications are possible within the scope of protection of the invention as defined in the appended claims. Method steps can be performed in an order that corresponds to the order wherein they are named in the claims, but also in an order that deviates from the order wherein they are named in the claims. Even if certain features are mentioned in different dependent claims, the present invention also relates to an embodiment that has these features together. Even if certain features are described in combination with each other, the present invention also relates to an embodiment wherein one or more of these features are omitted. Features that are not expressly described as being essential may also be omitted. Any reference numer- als used in a claim should not be construed as limiting the scope of said claim.

Claims

CLAIMS1 . A formwork segment (100) with a vertical longitudinal direction, comprising: a hollow form part (110) with vertical wall parts (111 , 112) and a filling space (113) therebetween, and first and second, mutually complementary, coupling parts (130, 150) on either side of the hollow form part (110), wherein the first coupling part (130) is able to cooperate with the second coupling part (150) of another, identical formwork segment (100) to form a sliding lock, and wherein the second coupling part (150) is able to cooperate with the first coupling part (130) of another, identical formwork segment (100) to form a sliding lock.

2. The formwork segment (100) according to claim 1 , wherein the first coupling part (130) comprises a concave coupling wall (131 ) defining a gutter (132) with a side opening (133), and wherein the second coupling part (150) comprises a convex coupling wall (151) defining a mushroom profile (153) fitting into the gutter (132).

3. The formwork segment (100) according to claim 1 or 2, wherein the form part (110) has the shape of a trapezium.

4. The formwork segment (100) according to any one of the preceding claims, provided with a reinforcement (120) arranged in the filling space (113).

5. The formwork segment (100) according to any one of the preceding claims, wherein at least the hollow form part (110) with vertical wall parts (111 ,112) is integrally formed, in particular forming a vertical tube, and optionally wherein the first and / or second mutually complementary coupling parts (130, 150) are integrally formed with the hollow form part (110).

6. A system of at least two formwork segments (100) according to any one of the preceding claims, wherein the first coupling part (130) of a first of said two formwork segments (100) is able to cooperate with the second coupling part (150) of a second of said two formwork segments (100) to form a sliding lock.

7. A method for making a partition wall in a soil, comprising the steps of, in particular the subsequent steps of: a] providing a first formwork segment (100) according to any one of the preceding claims; b] longitudinally pressing the first formwork segment (100) into the soil; d] providing a second formwork segment (100) according to any one of the preceding claims; e] longitudinally pressing the second formwork segment (100) into the soil, wherein the first and second coupling parts (130, 150) of the first and second formwork segments, respectively, or vice versa, engage each other to form a sliding lock, such that the movement and positioning of the second formwork segment (100) is guided by the first formwork segment (100); c] filling the filling space (113) of the first formwork segment (100) with concrete; f] filling the filling space (113) of the second formwork segment (100) with concrete; g] pulling up the first formwork segment (100) to remove it from the soil, while the concrete in the filling space (113) of the first formwork segment (100) is still liquid; h] pulling up the second formwork segment (100) to remove it from the soil, while the concrete in the filling space (113) of the second formwork segment (100) is still liquid, wherein the concrete in the filling space (113) of the second formwork segment (100) and the concrete in the filling space (113) of the first formwork segment (100) flow into each other and form a whole after curing.

8. The method according to claim 7, wherein step c) is performed between steps b) and d).

9. The method according to claim 7, wherein step c) is performed between steps e) and f).

10. The method according to claim 7, wherein step g) is performed prior to step *)■11 . The method according to claim 7, wherein step g) is performed after step f).

12. The method according to claim 7, further comprising repeating steps [d] - [f] for a third formwork segment (100), and repeating step [g] for the second formwork segment (100), wherein the concrete in the filling space (113) of the second formwork segment (100) merges with the remaining concrete of the first formwork segment (100).

13. The method according to claim 12, wherein the third formwork segment (100) is the first formwork segment (100) removed from the soil in step [g],14. The method according to claim 7, further comprising a plurality of cycles of repeating steps [d] - [f] for each subsequent formwork segment (100), wherein the first formwork segment (100) removed from the soil is reused in any subsequent cycle as the subsequent formwork segment (100).

15. The method according to any one of the preceding claims 7-14, wherein prior to step [f] a reinforcement (120) is provided in the filling space (113) of the second formwork segment (100).

16. The method according to any one of the preceding claims 7-15, wherein prior to step [c] a reinforcement (120) is provided in the filling space (113) of the first formwork segment (100).

17. The method according to any one of the preceding claims 7-16, wherein during steps [b] and [e] the surrounding soil is liquefied to reduce the resistance of the soil, such that the pushing down of the formwork segment can take place without vibration.

18. The method according to claim 17, wherein the liquefaction of the surrounding soil is done by injecting a liquid medium (1401 ) into the soil.

19. The method according to claim 18, wherein the liquid medium is a curing medium.

20. The method according to claim 19, wherein the liquid medium comprises grout.21 . The method according to any one of the preceding claims 18-20, wherein injecting the liquid medium into the soil is done by pumping the liquid medium downwards into at least one injection pipe (1310) which is provided with outlet openings (1320) at its lower end.

22. The method according to claim 21 , wherein, during injecting the liquid medium, the injection pipe (1310) is rotated about its longitudinal axis.

23. The method according to claim 22, wherein the lower end of the injection pipe (1310) is configured as a soil drill.

24. The method according to any one of the preceding claims 21 -23, wherein, during injecting the liquid medium, the injection pipe (1310) moves in a vertical direction with the formwork segment (100), wherein the lower end of the injection pipe (1310) is kept substantially level with the lower end of the formwork segment (100) or extends downwards beyond the lower end of the formwork segment (100).

25. A method for making a partition wall in a soil, comprising the steps of longitudinally pressing, preferably successive, formwork segments into the soil, wherein coupling parts of adjacent formwork segments, in particular each time coupling parts of successive formwork segments are coupled, form a sliding lock, wherein the placed formwork segments are, in particular each time a formwork segments is pressed into the soil, filled with liquid concrete, and wherein the formwork segments, after being filled with liquid concrete, are successively removed and the liquid concrete, preferably always, merges with the concrete from a previously removed adjacent formwork segment, in particular each time a formwork segment is removed.

26. An apparatus (1000) for inserting a formwork segment (100) into a soil according to any one of the preceding claims 1-6, wherein the apparatus (1000) comprises:- a frame (1100);- clamping means (1200) coupled to the frame (1100) for engaging the upper end of the formwork segment (100);- at least one pumping unit (1300) coupled to the frame (1100), each pumping unit (1300) comprising:= a substantially vertically downwardly directed drill pipe (1310), provided at its lower end with outlet openings (1320), which drill pipe is rotatably mounted relative to the frame (1100) and, in use, extends downward along the formwork segment (100); = a motor drive (1330) that engages the pipe (1310) to rotate it about its body axis (1311);27. The apparatus (1000) according to claim 26, further comprising: an entrance for receiving a liquid medium; and a pump (1340) for pumping the liquid medium down the drill pipe (1310).

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