NL2033261B1

NL2033261B1 - Reusable settlement plate system

Info

Publication number: NL2033261B1
Application number: NL2033261A
Authority: NL
Inventors: seibert Joachim; Duijts Dennis; Duijts Camiel
Original assignee: Deltalot B V
Priority date: 2022-10-07
Filing date: 2022-10-07
Publication date: 2024-04-19

Abstract

A reusable settlement plate system is disclosed. The settlement plate system comprises a base plate arrangement and a riser arrangement. The raiser arrangement removable mounted to the base plate arrangement, so that the riser 5 arrangement can be removed entirely when the settlement plate is buried under a sand pack. When the riser is removed, base plate arrangement remains in the ground. The base plate arrangement is made from materials which degrade over time and will not leave unwanted substances in the ground.

Description

Reusable settlement plate system

Field of the invention

[001] The present invention relates to a settlement plate system for measuring settlement of soil on a construction site, whereby the system comprises a base plate arrangement and a riser arrangement, riser arrangement being removable fixable to said base plate arrangement.

Background art

[002] In order to measure the settlement of soil, for example at a building site, during roadway construction or during dyke construction, settlement plates are used for monitoring the settlement of the site’s soil. Such settlement plate consists of a base plate and a riser, which is also known as telltale or extension rod.

[003] Such a settlement plate is known from the utility model CN210684811U disclosing a settlement plate for a soft soil foundation. Belonging to the field of buildings, the utility model discloses a settlement plate for a soft soil foundation. Bottom plate, a bottom pipe is fixedly welded to the upper surface of the bottom plate. The surface of the upper end of the bottom pipe is fixedly connected with a connecting pipe through a connector; the outer surface of the bottom pipe and the outer surface of the connecting pipe are slidably sleeved with a protection pipe. The protection tube is a PVC tube. Supporting ribs are fixedly connected to the surfaces of the bottom pipe and the bottom plate; the lower end surfaces of the supporting ribs are fixedly welded to the bottom plate. The inner end surfaces of the supporting ribs are fixedly welded to the outer surface of the lower side of the bottom pipe, the supporting ribs are distributed on the peripheral surfaces of the bottom plate and the bottom pipe, the supporting ribs are of a triangular frame structure, sinking resistance is reduced, hexagonal grooves are formed in the connecting pipe and the connector, a wrench can be conveniently clamped, twisted and connected, and the connecting pipe can be conveniently fastened in the connecting process. Fig. 1, displays the settling plate disclosed in CN210684811U, including a bottom plate 1, a bottom pipe 2 is fixedly welded on the upper surface of the bottom plate 1, and a connecting pipe 4 is fixedly connected to the upper surface of the bottom pipe 2 through a connector 3. The outer surface of the bottom tube 2 and the connecting tube 4 is slidingly sleeved with a protective tube 5, and the protective tube 5 is a

PVC tube. The bottom tube 2 is fixedly connected to the surface of the bottom plate 1 with a supporting rib 6, and the lower end surface of the supporting rib 6 is fixedly welded to the bottom plate 1. The inner end surface of the supporting rib 6 is fixedly welded to the lower outer surface of the bottom tube 2. The supporting ribs 6 are distributed on the surrounding surfaces of the bottom plate 1 and the bottom tube 2. The supporting rib 6 adopts a triangular frame structure, and the supporting rib 6 is provided with a triangle The opening 7, the triangular opening 7 of the supporting rib 6 is provided with a triangular notch groove 8, the lower outer end surface of the base plate 1 is provided with an annular notch groove 9, the outer surface of the connector 3 is provided with a first hexagonal groove 10, and the outer surface of the connecting pipe 4 is provided. The second hexagonal groove 11.

[004] Another settlement plate is know from https;//www.geokon.com/4625 and https: /fwww.geokon.com/content/datasheets/4625 Settlement Plate.pdf showing a settlement plate system which is designed primarily as an inexpensive means for monitoring in areas where significant settlement or substantial material displacement is expected. The system consists of a base plate and a reference rod (riser pipe) equipped with necessary threaded end connections enabling the pipe sections to connect to each other, as well as attach to the base plate. The system is further disclosed as having as the primary components a base plate, a reference rod and couplings for the rod. The base plate is typically constructed from a square, double thick, pressure treated plywood, however a steel plate may also be used in its place. The reference rod and couplings, female threaded on both ends, are composed of galvanized steel for maximum durability. The base plate is provided with a galvanized steel floor flange.

[005] Under normal circumstances, settlement plates are buried, mostly by sand, over the time of construction activities or preparations thereof. Once a settlement plate is buried deep in the ground, it is almost impossible to retrieve the system in a desirable way.

[006] To retrieve the complete system is only possible by using machinery like an excavator to dig a large and deep hole by removing the applied sand layers till reaching the level of the base plate, Thereafter the settlement plate system can be fully removed.

[007] If the contractor is obliged to remove the complete settlement plate system with all its riser pipes, a technical problem arise; The needed hole with about 5 meter diameter ranges between 2 and 10 meters deep and will act as a disturbance in the sand layer construction. The obtained stability of the applied sand layer on respective locations will be significantly disturbed and will not full-fill geotechnical soil stability requirements.

[008] Under construction law, there is often the obligation of the contractor to remove settlement plates from areas when the settlement monitoring came to a conclusion. However, usually, only a small portion of the riser can be removed without harming the sand layer construction as mentioned before. Furthermore, in case PVC pipe segments were used as a protective measure around the riser, as disclosed in CN210684811U, such PVC segments will remain in the soil. Under general sustainability assumptions, this is not desirable.

[009] In the system of the prior art, it is impossible to remove the base plate after such settlement monitoring activities without harming the applied sand layer construction at the locations of the settlement plates. Therefore the before mentioned known systems will always leave parts of various materials in the soil which was monitored. Under some circumstances, the entire riser remains buried in said soil.

[0010] The present invention seeks to overcome the shortcomings of the previously known systems by providing a settlement plate system which allows for the complete removal of all parts, with the exception of the base plate. However the base plate of the present invention is made from environmentally friendly materials which is bio-degradable and can be broken down by nature over time.

Summary of the invention

[0011] According to the present invention, a settlement plate system is proposed which employs a bayonet-like connection between a base plate having an aperture and a riser. Said bayonet-like connection allows for effortless decoupling and removal of the riser from the base plate. The decoupling requires a quarter turn to disengage the locking element.

[0012] The solution of the present invention is based of a locking mechanism employing a lacking member fixed to the riser and various abutment and engagement surfaces at the base plate.

[0013] A further aspect of the present invention is the use of environmentally friendly materials, in particular for parts of the settlement plate system which cannot be retrieved and therefore remain in the sail.

[0014] One embodiment of the present invention comprises the base plate with the aperture, wherein the baseplate is further provided with at least one recess forming abutment surfaces for the locking member.

[0015] In an alternative embodiment, the abutment surfaces are formed by at least one stopper block, wherein said stopper block is mounted to the lower surface of the base plate.

[0016] Further embodiments of the invention employ a bearing or guiding block which provides guidance to the lower part of the riser, thereby increasing the stability of the system. The bearing block further encloses the locking mechanism, thereby reducing the risk for sand of other soil matter to foul the locking mechanism.

[0017] Another aspect of the present invention is the use of bio-degradable materials for parts which will be left in the soil. Such materials are selected from the following list: wood, bamboo, plywood, bio-degradable plastics, biodegradable medium density fibreboard, or a combination thereof.

[0018] Another aspect of the present invention is the material used for the riser. Preferred materials for the riser need to be abrasion and corrosion resistant as well as strong in respect to tension and torsion. The riser of the present invention is therefore made from materials of the following list: steel, stainless steel, aluminium, carbon fibre composites, fibreglass composites, or a combination thereof.

Brief description of the drawings

[0019] The present invention will be discussed in more detail below, with reference to the attached drawings, in which:

[0020] Fig. 1 depicts a settlement plate according to the prior art.

[0021] Fig. 2 depicts the base plate of the settlement plate of the present invention.

[0022] Fig. 3 depicts the stopper block of the settlement plate of the present invention.

[0023] Fig. 4 depicts the guide or bearing of the present invention.

[0024] Fig. 5 depicts a rendering of the riser of the present invention.

[0025] Fig. 6 depicts a rendering of a simplified base plate with stopper blocks as view from below.

[0026] Fig. 7 depicts a schematic view of the settlement plate assembly, without the bearing block, in the unlocked position from below.

[0027] Fig. 8 depicts a side cut view of the settlement plate system, the riser being in the locked position.

[0028] Fig. 9 depicts a side cut view of of an alternative embodiment of the settlement plate system, the riser being in the locked position.

Brief description of best mode of the invention

[0029] The preferred way to carry out the present invention involves a base plate arrangement to which a riser arrangement can be locked and unlocked by a quarter turn of the riser. This allows the riser arrangement to be unlocked from the base plate arrangement, even if the base plate arrangement is deeply buried in sand or soil and therefore no longer accessible. It is an objective of the invention to allow the entire riser arrangement to be extracted when the settlement monitoring is concluded. This way, the only part that will remain in the soil after the settlement monitoring will be the base plate arrangement.

[0030] Therefore, in the preferred embodiment the base plate arrangement is made of a biodegradable material such as wood or bamboo. Further, the base plate arrangement and its components may also be made of biodegradable medium density fibreboard or biodegradable plastic materials. Also, a combination of the above mentioned materials can be conceived.

[0031] Further, in the preferred embodiment, see Fig.2, the base plate arrangement is foreseen with a base plate 20 having a central aperture 21. Said central aperture has a shape of an oblong, a rounded rectangle or a rectangle. An oblong, in this invention, is defined as two semi-circles connected by a rectangle.

[0032] The oblong shaped aperture, in the preferred embodiment, has a longest length (major axis) being at least 1.5 times or preferably but not limited to 2 times the length of the shortest length {minor axis).

[0033] The base plate arrangement 70 of the preferred embodiment, as shown in Fig.7, is further foreseen with at least one engagement surface 75 in the vicinity of the shortest dimension of the aperture. In other words, the at least one engagement surface is located next to the centre of the base plate 70 and next to the rectangle connecting the two circles of the oblong. Said at least one engagement surface 75 will lock the riser arrangement 72, 77 to the base plate 70 in the locked position of the riser arrangement, when a locking member 72 of the riser arrangement is rotated 79 into the locked position.

[0034] The base plate arrangement of the preferred embodiment is further foreseen with at least two abutment surfaces 73, 74. Said abutment surfaces define the open and closed position of the locking mechanism locking the riser to the base plate.

[0035] The abutment surfaces can be provided by at least one stopper block (30, 69). A stopper block can be a single block of material, see Fig. 3, or several independent part, as shown in Fig.6.

The stopper block (30) of Fig. 3 provides a cut-out (31) in which the locking element of the riser arrangement is accommodated when the settlement plate system is deployed. The stopper block

(30) provides at least one abutment surface (34) for the unlocked position and at least one abutment surface (33) for the locked position.

[0036] The riser arrangement 52, 55, 56, 57 of the preferred embodiment of the settlement plate system, see Fig.5, is made from a corrosion resistant material such as steel, stainless steel, aluminium, carbon fibre composites, fibreglass composites, or similar such materials. The riser arrangement is depicted up-side down in Fig.5.

[0037] The riser arrangement of the preferred embodiment consists of four functional parts, an upper riser portion 55, a middle portion 56, a locking member 52 and a lower riser portion 57. The lacking member is fixed between the middle riser portion and the lower riser portion.

[0038] The upper riser portion can be connected to extension rods, as commonly known in settlement plate systems. The upper riser portion 55 has a diameter which is at least as big as the longest dimension of the aperture in the base plate, in other words, the diameter of the upper riser portion is at least the length of the longest dimension of the oblong, as mentioned above. With a diameter of the upper riser portion’s abutment surface 59 being greater than the largest length of the central aperture 61 of the base plate 60, the upper riser section forms a lid, thereby closing the central aperture, which prevents sand or soil to enter the locking mechanism from above.

[0039] With a diameter of the upper riser portion 85 greater than the longest dimension of the oblong, the upper riser portion 85 will also have a diameter greater than the widest extension of the locking member 82. This is an important feature when the riser arrangement is to be removed after completion of the settlement monitoring. In such an arrangement, the larger diameter of the upper riser 85, against which the sand or soil pack rests, the upper riser 85 prevents the locking element 82 to catch the sand or soil pack. Therefore, the locking element 82 will not hinder the removal of the riser arrangement.

[0040] In the preferred embodiment, the middle portion 56 of the riser has a diameter less than the shortest length of the aperture in the base plate, as mentioned above. The middle portion of the riser can rotate freely in the aperture of the base plate, but is guided by the aperture.

Therefore, the diameter of the middle portion of the riser is greater than 0.5 times the shortest length of the aperture’s oblong.

[0041] The middle section 56 of the riser arrangement has a length which corresponds with the thickness of the base plate 60 at the location of the central aperture 61. This ensures that the base plate 60 at the location of the central aperture 61 is securely placed between the abutment surface 59 of the upper riser portion and the locking element 52. However, the dimensions need to be chosen such that the riser arrangement, when inserted to the base plate arrangement, can be rotated.

[0042] The locking element 52 of the preferred embodiment has an oblong shape, such as to fit through the aperture in the base plate in the unlocked position. Therefore, the dimensions of the locking member are smaller than the dimensions of the aperture 61 in the base plate 60, shown in

Fig.6. However, the longest dimension of the locking element 52 is longer than the shortest dimension of the aperture, such that the lacking member overlaps with the at least one

-B6- engagement surface 65 of the base plate 60, thereby locking the riser arrangement to the base plate.

[0043] In the preferred embodiment, the lower riser portion 57 extends beyond the locking element 52. The lower riser portion, since it extends beyond the base plate, is pushed into the ground when the settlement plate system is installed. The lower riser portion 57 thereby provides initial stability before the first deposition of sand or sail on top of the base plate.

[0044] The preferred embodiment of the settlement plate arrangement can optionally be provided with a bearing block 40, as shown in Fig.4. Said bearing block 40 is provided with a through-hole 49 in which the lower riser portion 57 can be accommodated. The bearing block 40 will thereby provide guidance to the riser arrangement. The bearing block 40 will also provide a certain protection to the locking mechanism by forming a barrier for soil or sand to enter the locking mechanism.

[0045] Fig. 8 depicts a base plate arrangement having a base plate 80 with a central aperture 81, a stopper block 83 and a bearing block 84.

[0046] Fig. 8 further depicts a riser arrangement 82, 85, 86, 87, 88 being inserted into the base plate arrangement 80, 83, 84 in a locked position. Fig. 8 shows that the upper riser section 85 abuts against the upper surface of the base plate 80. With upper riser portion 85 resting on the base plate 80, the riser arrangement is held perpendicular to the base plate arrangement. Further, the upper riser portion, by resting on the base plate 80 over the central aperture 81, the upper riser portion 85 acts as a lid, thereby protecting the central aperture 81 from sand or soil.

[0047] The middle riser section 86 is accommodated inside the central aperture 81 of the base plate 80.

[0048] The locking member 82 is engaged in a locked position and abuts against the lower surface of the base plate 80. The locking element is accommodated inside cut-out the stopper block 83.

[0049] The lower riser portion 87 is accommodated by the beating block 84. Said bearing block 84 closes the cut-out of the stopper block 83, thereby preventing soil to enter into the locking mechanism from below.

Description of embodiments

[0050] In a first alternative embodiment, see Fig. 9, a base plate 90 is provided with a central aperture 91 and a recess 99 which forms at least two abutment surfaces and at least one engagement surface.

[0051] In this embodiment, the central aperture 21, 91 is shaped in the form of an oblong, as depicted in Fig. 2. This allow the passage of the locking element 92 in the unlocked position.

[0052] The recess 99 in the base plate 90 has shape similar to the shape of the cut-out 31 in the stopper block 30, as shown in Fig.3. Thereby the recess will form the abutment surface of the unlocked position 34 and the abutment surface for the locked position 33.

[0053] The recess 99 has a depth such to be able to accommodate the locking element 92, still allowing to the rotation of the riser assembly, see Fig. 9, which depicts the first alternative embodiment in the locked position.

[0054] Similarly to the preferred embodiment, an optional bearing block 40, 84 can be mounted to the lower surface of the base plate. This bearing block provides additional stability to the riser arrangement 92, 95, 96, 96, 98. The bearing block 94 also closes the space for the locking mechanism formed by the recess 99.

[0055] In a section alternative embodiment, see Fig. 10, the base plate 100 is provided with the central aperture 21, 101 in form of an oblong, as depicted in Fig. 2. Similar to the first alternative embodiment, a first recess 109 is formed to provide at least two abutment surfaces and at least one engagement surface. The first recess 109 has a depth proximately equivalent to the locking element 102, still allowing the riser assembly to be rotated.

[0056] In the second alternative embodiment, a second recess 110 is formed, shallower than the first recess 109. Said second recess 110 has the shape of the bearing block 40, 104, as depicted in Fig. 4. Said second recess 110 preferably has the depth equivalent to the thickness of the bearing block 104, so that the lower surface of the bearing block 104 is flush with the lower surface of the base plate 100.

[0057] In Fig. 10, the second alternative embodiment is depicted employing dowels 111 in order to mount the bearing block 104 into the recess 110 of the base plate 100. Using dowels, in particular wooden dowels, is commonly known, however, such wooden dowels provide an advantage not commonly recognised. In a moist environment, wood will swell to a certain extend.

With the proper combination of types of wood or bamboo, the wooden dowel will swell over time and thereby strengthen the connection between the parts. While dowels are only depicted in the second alternative embodiment, dowels would a suitable option of all embodiments of the present invention.

[0058] The second alternative embodiment, having a flush surface can easily be piled and stored. Further, the locking mechanism is protected from ingress of sand or soil, when installed.

[0059] The base plate 20, 60, 80, 90, 100 of all embodiments has a dimension from about 30x30 cm? to about 2x2 m2, depending on the environment and circumstances of the settlement monitoring. Under practical considerations, smaller base plates are easier to transport, handle and install. However, a smaller base plate may not offer the initial stability required for the system.

Large base plates, in contrast, do provide better initial stability, will be however difficult to handle and install, in particular with a smaller crew. The most preferred dimension for the base plate is therefore considered being between 50x50 cm? and 1x1m2.

[0060] The base plate 20, 60, 80, 90, 100 of the settlement plate system will remain in the ground. Therefore, the base plate is made of a material which is biodegradable over time and not harmful for the environment. A preferred material for the base plate is therefore wood, in particular from fast growing trees, such as eucalyptus or pine. Another preferred material for the base plate is bamboo.

[0061] The base plate can also be made from wood based materials, such as biodegradable medium density fingerboard (MDF) or biodegradable plywood.

[0062] The base plate can also be made from biodegradable plastic materials. Using such materials has the benefits of mass production methods such as moulding or additive manufacturing. Compared to the above mentioned natural materials, the base plate can be manufactured without creating scrap materials such a wood dust and shavings. Therefore, base plates made from biodegradable materials can be seen are potentially more environmentally friendly.

[0063] The base plate 20, 60, 80, 90, 100 is provided with an aperture 21, 61, 81, 91, 101 in shape of an oblong, a rounded rectangle or a rectangle. When using wood, bamboo or a wood based material, the manufacturing of the base plate requires an aperture to be cut into the centre portion of the base plate. Hereby, an aperture with the shape of an oblong has the advantage a easy creation by drilling two through-holes and cutting out the material in between the two through-holes.

[0064] The oblong shape can also be created easily by a drill mill process, in which a drilk-mill bit is lowered at one end of the oblong to be created in a first step, moved to the other end of the oblong to be created in a second step and pulled up in a third step.

[0065] Any other suitable shapes can be used, however, such other shapes might need fabrication methods such as laser-cutting or watet-jet-cutting. Laser-cutting can provide an additional advantage of burning markings, drawings and/or instructions into the surface of the base plate. Such markings, drawings and/or instruction can help the assembly and installation process of the settlement plate system, thereby improving the reliability of the installation.

[0066] The at least one engagement surface 25, 65 of the base plate, as shown in Fig. 2 and Fig. 6, is not a particular separate physical item but rather an area of a surface on the base plate 20, 60. This area can be either on the bottom surface of the plate, or, in further embodiments, be formed by a recess in the base plate. Said recess of the further embodiments can be formed either my milling, when using a wood or bamboo based material. The recess of the further embodiments can also be formed by moulding or by additive manufacturing (AM), when a plastic material is used for the base plate.

[0067] The base plate 60, 70 is further foreseen with abutment surfaces 33, 34, 63, 64, 73, 74, as shown in Fig. 6 and Fig.7. Said abutment surfaces 73, 74, as shown in Fig.7, will stop the rotation 79 of the riser arrangement 72, 77 when the locking element 72 of the riser arrangement abuts against one of the abutment surfaces 73, 72. A rotation in a particular direction is stopped when the locking element 72 abuts against the abutment surface of either the open or unlocked position or the closed or locked position. In the open position, as shown in Fig.7, the riser arrangement can be moved through the aperture of the base plate 70. In the closed or locked position, after the riser arrangement has been rotated 79, with the locking element engaging with the at least one engagement surface 75 of the base plate 70, the locking element is engaged with the engagement surface 75 and therefore the locking element prevents the riser arrangement to be moved out or pulled out of the aperture in the base plate 70, hence, the riser arrangement is in a closed or locked position.

[0068] The abutment surfaces 33, 63, 34, 64 can also be provided by at least one stopper block 30, 69, as shown in Fig.3 and Fig.6. Said stopper block is permanently fixed to the lower surface of the base plate 20, 60 adjacent to the aperture 21, 61 in the base plate. Said stopper block is made from a biodegradable material selected from the list of wood, plywood, bamboo, MDF, biodegradable plastics or similar materials.

[0069] The at least one stopper block 30, 69 is adhered to the lower surface of the base plate (20, 60) by means of a, preferably an environmental friendly, adhesive or by form fitting, for example with wooden dowels as known from fumiture manufacturing. Form-fitting has the added advantage of not having an additional substance which might influence the environment over time. The combination of glueing with an adhesive and form-fitting adds strength to the base plate arrangement by the use of a small amount of adhesive.

[0070] Form-fitting construction with dowels ensure that the stopper block is correctly aligned when the stopper block is fixed to the lower surface of the base plate. Said dowels can be wooden dowels or dowels made from any other suitable biodegradable material.

[0071] Form-fitting construction can be achieved even more easily when the parts of the base plate arrangement are manufactured by moulding or AM.

[0072] In order to help the process of aligning the stopper block with and fixing the stopper block to the base plate by adhesion only, the base plate can be provided with markings or line-outs indicating the correct position of the stopper block. Said markings and outlines can be burnt in with a laser burning or cutting machine.

[0073] In a first alternative embodiment, see Fig. 9, the abutment surfaces can also be provided by a recess 99 in the base plate 90. Said recess can be formed my milling, when using a wood, plywood, MDF or bamboo based material. The recess can also be formed by moulding or by AM, when a plastic material is used.

[0074] In this alternative embodiment, the at least one engagement surface is formed by the milling process. The at least one engagement surface is thereby the milled out surface which is coplanar to the lower surface of the base plate. The locking element 92 engages with the engagement surface in the recess in order to lock the riser assembly 92, 95, 96, 97, 98, as shown in Fig.9.

[0075] The advantage of the alternative embodiment, all surfaces relevant to the locking mechanism are created in a single manufacturing step. The alternative embodiment therefore provides a simplified manufacturing process of the locking mechanism.

[0076] A further advantage of the alternative embodiment is that manufactured base plate arrangement can easily piled, since no features extend beyond the base surfaces of the base plate.

[0077] The diameter of the upper riser portion 85, 95, 105 is between 1.5 cm and 20 cm, depending on the environment and circumstances of the settlement monitoring. However, said diameter is matched to the dimensions of the hase plate and the aperture therein. In general, the diameter of the upper riser portion is greater than the longest distance in the aperture.

[0078] Diameter of the lower middle and riser portions between 0.5 cm and 10 cm, depending on the environment and circumstances of the settlement monitoring.

[0079] The lower portion 57, 87, 97, 107 can be provided with a tapered tip 88, 98, 108. Such a tapered tip will help to insert the lower riser portion into heavier soil.

[0080] The shape of the locking element 52, 72, 82, 92, 102 corresponds to the shape of the central aperture 21, 61, 81, 91, 101. While the shape of the central aperture 21, 61, 81, 91, 101 and the locking element 52, 72, 82, 92, 102 also could be rectangular, to provide the functionality described above, it is advantageous for the locking element to have no sharp edges, as sharp edges pose risk of injury to field workers. Therefore it is preferred that the shape of the locking element is either an oblong or a rounded rectangle.

[0081] While Fig. 7 depicts a counter-clockwise rotation 79 of the upper riser portion in order to lack the riser arrangement 72, 77 to the base plate arrangement 70, the arrangement can also be built such that a clockwise rotation of the upper riser portion would lock the arrangements together. The choice of direction of rotation is given by other circumstances, such as the type of extension rods used in the settlement monitoring.

[0082] The part of the riser assembly can be made from any corrosion and abrasion resistant material. When using metal, such as steel, stainless steel, aluminium or brass, the individual parts can be manufactured separately and welded together or fabricated by a lathe and corresponding fabrication methods.

[0083] The riser assembly can however also be fabricated from modern composite materials such a carbon fibre composites of fibreglass composites. Modern composite materials have the advantage of allowing to strengthen some parts of the construction by adding more reinforcement, compared to other parts of the construction. Therefore, in particular parts of the riser arrangement can be designed to a similar loud bearing capabilities than other parts of the riser arrangement having lager diameters.

[0084] Depending on the materials used for the fabrication of the riser arrangement, an abrasion resistive coating can be applied to the riser arrangement. Such a coating will reduce the friction between the sand pack and the riser, which commonly is done by placing a PCV tube around the riser, as described in CN210684811U. The anti-abrasive coating further helps a smooth motion of the riser arrangement during unlocking of the riser arrangement by a quarter turn. Said quarter turn should be sufficient to overcome the friction between the riser arrangement and the sand pack. Therefore the anti-abrasion coating will also aid the full removal of the entire riser and riser arrangement.

[0085] List of reference signs 1, 9 = base plate of the prior art 2 = riser of the prior art 3 = riser connector of the prior art 4 = riser extension of the prior art 5 = protective PVC tube of the prior art 6 = support rib of the prior art 7 = opening in the support rip of the prior art 10, 11 = hexagonal groove in the settlement plate system of the prior art 20, 60, 80, 90, 100 = base plate 21, 61, 81, 91, 101 = aperture in the base plate

25, 65 = engagement surface / zone / area 27 = area for the stopper block(s) 30, 69, 83 = stopper block 31 = cut-out in the stopper block 33, 63, 73 = abutment surface for the locked position

34, 64, 74 = abutment surface for the unlocked position 40, 84, 94, 104 = bearing / guide block 49 = through whole in the bearing / guide block 52, 72, 82, 92, 102 = locking element

55, 85, 95, 105 = upper riser portion 56, 86, 96, 106 = middle riser portion 57,77, 87, 97, 107 = lower riser portion 59 = upper riser abutment surface 79 = direction of engagement action

88, 98, 108 = tapered tip 99, 109 = recess in base plate forming at least one abutment surface 110 = recess for bearing / guide block 111 = dowel

Claims

ConclusiesConclusions

1. Een voetplaat inrichting geconfigureerd voor een zakbaaksysteem, waarbij de voetplaat inrichting omvat: een voetplaat (20,70, 80, 90, 100), waarin de voetplaat is voorzien van een centrale opening (21, 61, 81, 91, 101).1. A base plate device configured for a pocket marker system, the base plate device comprising: a base plate (20, 70, 80, 90, 100), wherein the base plate is provided with a central opening (21, 61, 81, 91, 101) .

2. Een voetplaat inrichting volgens conclusie 1, waarbij de centrale opening een lengte en een breedte heeft, waarbij de afmetingen van de breedte en lengte verschillend zijn.A base plate device according to claim 1, wherein the central opening has a length and a width, the dimensions of the width and length being different.

3. Een voetplaat inrichting volgens conclusie 2, waarbij de afmeting van de lengte tenminste 1,5 maal de afmeting van de breedte is.A base plate device according to claim 2, wherein the dimension of the length is at least 1.5 times the dimension of the width.

4. Een voetplaat inrichting volgens conclusie 2 of 3, waarbij de voetplaat inrichting verder ten minste één aanlig vlak (33, 34) omvat.A base plate device according to claim 2 or 3, wherein the base plate device further comprises at least one contact surface (33, 34).

5. Een voetplaat inrichting volgens conclusie 4, waarbij het ten minste ene aanlig vlak wordt gevormd door een uitsparing (99, 109) in de basisplaat naast de centrale opening.A base plate device according to claim 4, wherein the at least one contact surface is formed by a recess (99, 109) in the base plate next to the central opening.

6. Een voetplaat inrichting volgens conclusie 5, waarbij de voetplaat inrichting verder een lagerblok omvat, waarbij het lagerblok (40, 94, 104) aan de basisplaat is bevestigd om de uitsparing te bedekken die het aanslagopperviak vormt.A base plate device according to claim 5, wherein the base plate device further comprises a bearing block, the bearing block (40, 94, 104) being attached to the base plate to cover the recess forming the abutment surface.

7. Een voetplaat inrichting volgens conclusie 4, waarbij het ten minste ene aanlig vlak wordt gevormd door een stop blok (30, 83) met een uitsnijding (31) en dat aan de basisplaat is bevestigd.A base plate device according to claim 4, wherein the at least one contact surface is formed by a stop block (30, 83) with a cutout (31) and which is attached to the base plate.

8. Een voetplaat inrichting volgens conclusie 7, waarbij de voetplaat inrichting verder een lagerblok (40, 84) omvat, waarbij het lagerblok aan het stop blok is bevestigd om de uitsnijding in het aanslagblok te bedekken dat de ten minste één aanslagvlak vormt.A base plate device according to claim 7, wherein the base plate device further comprises a bearing block (40, 84), the bearing block being attached to the stop block to cover the cutout in the stop block that forms the at least one stop surface.

9. Een voetplaat inrichting volgens een van de voorgaande conclusies, waarbij de voetplaat inrichting van milieuvriendelijke materialen is gemaakt.A base plate device according to any one of the preceding claims, wherein the base plate device is made of environmentally friendly materials.

10. Een voetplaat inrichting volgens conclusie 9, waarbij het milieuvriendelijke materiaal is gekozen uit hout, bamboe, multiplex, biologisch afbreekbare vezelplaat met gemiddelde dichtheid, biologisch afbreekbare polymeren of een combinatie daarvan.A base plate device according to claim 9, wherein the environmentally friendly material is selected from wood, bamboo, plywood, biodegradable medium density fibreboard, biodegradable polymers or a combination thereof.

11. Een uitschuifbare buis mechanisme die is geconfigureerd voor een zakbaaksysteem, waarbij de uitschuifbare buis omvat: het bovenste uitschuif gedeelte (55, 85, 95, 105) het middelste uitschuif gedeelte (56, 86, 96, 106), het onderste uitschuif gedeelte (57, 87, 97, 107) en een vergrendelingselement (52, 82, 92, 102) gemonteerd tussen het middelste uitschuif gedeelte en het onderste uitschuift gedeelte.11. An extendable tube mechanism configured for a pocket staff system, the extendable tube comprising: the upper extension section (55, 85, 95, 105) the middle extension section (56, 86, 96, 106), the lower extension section (57, 87, 97, 107) and a locking element (52, 82, 92, 102) mounted between the middle extension section and the lower extension section.

12. Een uitschuifbare buis mechanisme volgens conclusie 11, waarbij het vergrendelingsdeel een lengte en een breedte heeft, waarbij de afmetingen van de lengte en de breedte verschillend zijn.An extendable tube mechanism according to claim 11, wherein the locking part has a length and a width, the dimensions of the length and the width being different.

13. Een uitschuifbare buis mechanisme volgens conclusie 12, waarbij de afmeting van de lengte ten minste 1,5 maal de afmeting van de breedte is.An extendable tube mechanism according to claim 12, wherein the length dimension is at least 1.5 times the width dimension.

14. Een uitschuifbare buis mechanisme volgens conclusie 12 of 13, waarbij het bovenste uitschuif gedeelte (55) een aanlig vlak (54) heeft, waarbij het aanlig vlak een cirkelvorm heeft, waarbij de diameter van het aanlig vlak gelijk is aan of groter is dan de afmeting van de lengte van het vergrendelingselement.An extendable tube mechanism according to claim 12 or 13, wherein the upper extendable portion (55) has an abutment surface (54), the abutment surface having a circular shape, the diameter of the abutment surface being equal to or greater than the dimension of the length of the locking element.

15. Een uitschuifbare buis mechanisme volgens een van de conclusies 11 tot 14, waarbij het onderste uitschuif gedeelte is voorzien van een taps toelopende punt (88, 98, 108) aan het distale uiteinde van de uitschuifbare buis, om de installatie van de uitschuifbare buis in dichte grond te vergemakkelijken.An extendable tube mechanism according to any one of claims 11 to 14, wherein the lower extendable portion includes a tapered point (88, 98, 108) at the distal end of the extendable tube, to facilitate installation of the extendable tube in dense soil.

16. Een uitschuifbare buis mechanisme volgens een van de conclusies 11 tot 15, waarbij de uitschuifbare buis opstelling is gemaakt van messing, staal, roestvrij staal, aluminium, koolstofvezel composieten, glasvezel composieten of elke geschikte combinatie van dergelijke materialen.An extendable tube mechanism according to any one of claims 11 to 15, wherein the extendable tube arrangement is made of brass, steel, stainless steel, aluminium, carbon fiber composites, fiberglass composites or any suitable combination of such materials.

17. Een zakbaaksysteem omvattende een voetplaat inrichting volgens conclusies 1 tot 10 en een uitschuifbare buis mechanisme volgens conclusies 11 tot 16.A pocket staff system comprising a base plate device according to claims 1 to 10 and an extendable tube mechanism according to claims 11 to 16.

18. Zakbaaksysteem volgens conclusie 17, waarbij het vergrendelingselement (52, 82) van de uitschuifbare buis door de centrale opening (21, 61) van de voetplaat past, wanneer het vergrendelingselement is uitgelijnd met de centrale opening.The pocket staff system of claim 17, wherein the locking element (52, 82) of the extendable tube fits through the central opening (21, 61) of the base plate when the locking element is aligned with the central opening.

19. Zakbaaksysteem volgens conclusie 17, waarbij het vergrendelingselement (52, 82) van de uitschuifbare buis niet door de centrale opening (21, 61) van de voetplaat past, wanneer het vergrendelingselement niet is uitgelijnd met de centrale opening .Pocket staff system according to claim 17, wherein the locking element (52, 82) of the extendable tube does not fit through the central opening (21, 61) of the base plate when the locking element is not aligned with the central opening.

20. Werkwijze voor het vervaardigen van een voetplaat inrichting volgens conclusies 1 tot 10.20. Method for manufacturing a base plate device according to claims 1 to 10.

21. Werkwijze voor het vervaardigen van een uitschuifbare buis mechanisme volgens conclusies 11 tot 16.21. Method for manufacturing an extendable tube mechanism according to claims 11 to 16.