Tracing line test pile

Abstract

The utility model relates to a tracer line test pile, which belongs to the technical field of test piles and comprises a pile seat, an insertion groove is arranged at the top of the pile seat, and a counter bore is arranged on the bottom surface of the pile seat. A reinforcing plate set is arranged in the pile body, and the bottom of the pile body is inserted into the inserting groove; the pile cover covers the top of the pile body and is provided with a groove body, and a peripheral ring is arranged on the top surface of the pile cover; the screw rod is locked with the reinforcing plate group through two first nuts, is locked with the pile seat through a second nut and is locked with the pile cover through a third nut; the top cover is locked on the pile cover through a lock, and a closed mounting space is formed among the pile cover, the top cover and the peripheral ring; the insulating plate is mounted in the mounting space, a test binding post is arranged on the insulating plate, the interior of the screw rod is hollow to form a long through hole, the tracing line is inserted into the long through hole, and the tracing line penetrates through the insulating plate and then is electrically connected with the test binding post.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tracer line test technical field, especially relate to a tracer line test pile. BACKGROUND

[0002] Most gas pipelines are buried underground, for the convenience of staff to determine the position of the pipeline, the positioning of the underground gas PE pipeline mostly adopts radar detection technology, which is to connect the metal tracer line attached to the pipeline through the transmitter, and to determine the position of the pipeline through the receiver detection and the signal transmission of the tracer line. At the same time, in order to facilitate testing, a tracer line test pile is usually set on the ground.

[0003] As a relatively mature prior art, the tracer line test pile is commonly used in the process of laying gas pipelines. The main body of the tracer line test pile in the prior art is mostly a stainless steel pipe and a component, which has certain economic value. The metal tracer line laid in it also has certain economic value. Moreover, most of the current tracer line test piles are located outdoors, so they are inevitably attractive to thieves. However, the tracer line test pile in the prior art does not have an effective anti-theft structure, so it is easy to be stolen. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a tracer line test pile for solving the above technical problems raised in the background art.

[0005] The utility model realizes the following technical scheme: a tracer line test pile, comprising:

[0006] A pile base is provided with a slot at the top, and a counterbore is formed in the bottom surface of the pile base;

[0007] A pile body is in a cylindrical structure penetrating through the top and bottom, and a reinforcing plate group is arranged inside the pile body to increase the structural strength. The bottom of the pile body is inserted into the slot;

[0008] A pile cover is buckled on the top of the pile body, and the pile cover is provided with a groove protruding towards the inside of the pile body. A peripheral ring is arranged on the top surface of the pile cover at the edge thereof;

[0009] A screw rod penetrates through the reinforcing plate group, and two first nuts are screwed on the screw rod. The two first nuts are arranged on the two sides of the reinforcing plate group and used to lock the screw rod to the reinforcing plate group. The bottom of the screw rod penetrates through the groove bottom of the slot and extends into the counterbore. A second nut is screwed on the screw rod, and the second nut is arranged in the counterbore and used to lock the screw rod to the pile base. The top of the screw rod penetrates through the groove bottom of the groove and extends into the groove. A third nut is also screwed on the screw rod, and the third nut is arranged in the groove and used to lock the screw rod to the pile cover;

[0010] a top cover locked on the pile cover by a lock, a closed installation space formed among the pile cover, the top cover and the peripheral ring;

[0011] an insulation board installed in the installation space, a test terminal provided on the insulation board, the screw rod hollowed to form a long through hole, the tracer wire inserted into the long through hole and the tracer wire electrically connected with the test terminal after penetrating through the insulation board.

[0012] Further, the top surface of the pile cover is further provided with an inner ring, the inner ring is located on the inner side of the peripheral ring, and the groove body is located on the inner side of the inner ring.

[0013] Further, the top surface of the pile cover is further provided with an inner ring, the inner ring is located on the inner side of the peripheral ring, and the groove body is located on the inner side of the inner ring.

[0014] Further, the inner ring and the peripheral ring are provided with a plurality of reinforcing blocks for increasing the structural strength, the top surface of one of the reinforcing blocks is provided with a mounting hole, the lock comprises a lock cylinder for inserting a key and a lock shell matched with the lock cylinder for locking, the lock shell is installed in the mounting hole, and the lock cylinder is installed on the top cover.

[0015] Further, the top cover comprises:

[0016] a first plate lapped on the inner ring and the reinforcing block, the first plate is located in the peripheral ring, and the lock cylinder is installed on the first plate.

[0017] a second plate, one side plate surface is provided with a clamping plate, the second plate is lapped on the top surface of the peripheral ring, and the clamping plate is inserted and clamped in the top opening of the peripheral ring.

[0018] Further, the top surface between the first plate and the inner ring is further provided with a sealing ring.

[0019] Further, the reinforcing plate group comprises:

[0020] a plurality of flat plates, the flat plates are fixedly arranged in the pile body, the flat plates are uniformly distributed along the length direction of the pile body, the flat plates are provided with a center hole, and the screw rod is inserted into the center hole.

[0021] Further, in order to better realize the utility model, the counterbore is provided with a rubber plug for plugging the counterbore, and the tracer wire penetrates the rubber plug.

[0022] Compared with the prior art, the utility model has the following beneficial effects:

[0023] The utility model provides a tracer wire test pile, which comprises a pile base, a pile body, a pile cover, a screw rod, a top cover and an insulating plate, the top of the pile base is provided with a slot, the bottom surface of the pile base is provided with a counterbore, the pile body is in a cylindrical structure penetrating the top and bottom, the inside of the pile body is provided with a reinforcing plate group for increasing structural strength, the bottom of the pile body is inserted into the slot, the pile cover is buckled on the top of the pile body, the pile cover is provided with a groove body protruding towards the inside of the pile body, the top surface of the pile cover is provided with a peripheral ring at the edge thereof, the screw rod penetrates the reinforcing plate group, two first nuts are screwed on the screw rod, the two first nuts are respectively located on the two sides of the reinforcing plate group, the two first nuts are used for locking the screw rod on the reinforcing plate group, the bottom of the screw rod penetrates the groove bottom of the slot and extends into the counterbore, one second nut is screwed on the screw rod, the second nut is located in the counterbore, and the second nut is used for locking the screw rod on the pile base, the top of the screw rod penetrates the groove bottom of the groove body and extends into the groove body, one third nut is further screwed on the screw rod, the third nut is located in the groove body, and the third nut is used for locking the screw rod on the pile cover, the top cover is locked on the pile cover through a lock, the top cover plugs the peripheral ring, a closed mounting space is formed between the pile cover, the top cover and the peripheral ring, the insulating plate is installed in the mounting space, the insulating plate is provided with a test terminal post, the inside of the screw rod is hollow and forms a long through hole, the tracer wire is inserted into the long through hole, and the tracer wire is electrically connected with the test terminal post after penetrating the insulating plate.

[0024] The test pile is transported by disassembling and transporting each component separately. When reaching the installation position, the screw rod is first inserted into the pile body and penetrates the reinforcing plate set inside the pile body, then two first nuts are installed to lock the screw rod to the reinforcing plate set, the bottom of the pile body is inserted into the slot on the pile base, the bottom of the screw rod penetrates the slot bottom and extends into the counterbore, then the second nut is screwed on the screw rod to lock the screw rod to the pile base, so that the pile base and the pile body are connected together, then the pile cover is placed on the top of the pile body, the top of the screw rod penetrates the slot bottom of the slot in the pile cover and extends into the slot, then the third nut is screwed on the screw rod to lock the screw rod to the pile cover, so that the pile cover and the pile body are connected together, and the pile cover, the pile body and the pile base are stably connected together, then the tracer line is passed through the long through hole inside the screw rod from bottom to top and the top end of the tracer line extends into the slot, then the top end of the tracer line is connected to the test terminal on the insulating plate, the insulating plate is placed on the top surface of the pile cover, then the top cover is placed on the top of the peripheral ring on the pile cover and locked by the lock, at this time, the peripheral ring and the top cover form a cover shell covering the slot and the insulating plate, so that the third nut is located in a closed space, finally, the pile base is placed in the installation position and buried underground, so that the pile body and the pile cover are located above the ground. The pile body is provided with a gas pipeline related sign and a corresponding warning slogan.

[0025] Through the above structure, the tracer line test pile provided by the utility model stably connects the pile cover, the pile body and the pile base together to form a whole by means of the screw rod, the first nut, the second nut and the third nut, wherein the third nut is located in the pile base, when the pile base is buried in the ground, the third nut is also located underground, the second nut is located inside the pile body, and the third nut is located inside the cover shell, so that the first nut, the second nut and the third nut are not exposed, avoiding corrosion caused by wind and sunlight, the lock is arranged, so that the pile cover can only be opened when the staff holds the corresponding key, the first nut, the second nut and the third nut are better combined to play a better anti-theft effect, the outer surface of the test pile does not need to be provided with a small hole, so that the whole is more integral and more beautiful. When the tracer line needs to be tested, the top cover is opened by the key, the test device (such as a signal receiver) is connected to the test terminal, so that the tracer line is tested, and the top cover is covered after the test. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0027] Figure 1 is a structure schematic diagram of the tracer line test pile provided by the embodiment of the present application;

[0028] Figure 2 is a sectional view of the tracer line test pile provided by the embodiment of the present application;

[0029] Figure 3 is Figure 2 A area local enlarged view in the figure;

[0030] Figure 4 is Figure 2 B area local enlarged view in the figure;

[0031] Figure 5 is an explosion view of the structure formed by assembling the top cover and the pile cover together in the embodiment of the present application;

[0032] Figure 6 is a structure schematic diagram of the pile cover in the embodiment of the present application;

[0033] Figure 7 is Figure 6 another view of the pile cover shown in the figure;

[0034] Figure 8 is a structure schematic diagram of the pile base in the embodiment of the present application;

[0035] Figure 9 is Figure 8 another view of the pile base shown in the figure;

[0036] Figure 10 is a top view structure schematic diagram of the pile body in the embodiment of the present application;

[0037] Figure 11 is a structure schematic diagram of the second plate and the clamping plate in the embodiment of the present application.

[0038] In the figure:

[0039] 1-pile base; 101-slot; 102-counterbore; 2-pile body; 201-flat plate; 3-pile cover; 301-trough body; 302-outer ring; 303-inner ring; 304-reinforcement block; 4-screw; 5-first nut; 6-second nut; 7-third nut; 8-top cover; 801-first plate; 802-second plate; 803-card plate; 9-lock housing; 10-lock core; 11-insulating plate; 111-test terminal; 12-insulating mounting block; 13-sealing ring; 14-rubber plug; 15-tracer wire. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] Example 1:

[0042] like Figures 1-11 As shown, the tracer line test pile provided in this embodiment includes a pile base 1, a pile body 2, a pile cover 3, a screw 4, a top cover 8 and an insulating plate 11, and a test terminal 111 is provided on the insulating plate 11, wherein:

[0043] A slot 101 is provided on the top of the pile seat 1, and a countersunk hole 102 is provided on the bottom of the pile seat 1. The countersunk hole 102 is coaxial with the slot 101, and a through hole is provided at the bottom of the slot 101, which is located in the center of the slot 101 and connects the countersunk hole 102 and the slot 101.

[0044] The pile body 2 is a cylindrical structure with its upper and lower ends penetrated. A reinforcement plate group is provided inside the pile body 2 to increase the structural strength. Optionally, the reinforcement plate group is a plurality of flat plates 201 integrally formed with the pile body 2. The flat plates 201 are evenly distributed along the length of the pile body 2, that is, the flat plates 201 are evenly distributed between the top and bottom ends of the pile body 2. A central hole is provided in the center of the flat plate 201, which penetrates both the upper and lower surfaces of the flat plate 201.

[0045] The bottom of the pile body 2 is inserted into the slot 101. Optionally, glue is applied to the bottom outer wall of the pile body 2 and the bottom of the pile body 2 is bonded to the slot 101 using the glue. Of course, the bottom of the pile body 2 can also be inserted into the slot 101 by interference fit.

[0046] The pile cover 3 is buckled on the top of the pile body 2, the pile cover 3 is provided with a groove body 301 protruding towards the inside of the pile body 2, the groove body 301 is coaxial with the pile body 2, the top surface of the pile cover 3 is provided with a peripheral ring 302 at the edge thereof, and the slot opening of the groove body 301 is located inside the peripheral ring 302. Optionally, an inclined surface is arranged at the top outer edge of the peripheral ring 302 to facilitate the backflow of rainwater falling thereon. A through hole is formed in the groove bottom of the groove body 301, and the through hole is coaxial with the groove body 301.

[0047] The screw rod 4 is inserted into the center hole, so that the screw rod 4 penetrates the reinforcing plate group, two first nuts 5 are screwed on the screw rod 4, the two first nuts 5 are respectively located on the two sides of the reinforcing plate group, and the two first nuts 5 are used to lock the screw rod 4 to the reinforcing plate group; the bottom of the screw rod 4 is inserted into the through hole, so that the screw rod 4 penetrates the slot bottom of the slot 101 and extends into the counterbore 102, a second nut 6 is screwed on the screw rod 4, the second nut 6 is located in the counterbore 102, and the second nut 6 is used to lock the screw rod 4 to the pile base 1; the top of the screw rod 4 is inserted into the groove body 301, so that the screw rod 4 penetrates the groove bottom of the groove body 301 and extends into the groove body 301, and a third nut 7 is further screwed on the screw rod 4, the third nut 7 is located in the groove body 301, and the third nut 7 is used to lock the screw rod 4 to the pile cover 3.

[0048] The top cover 8 is locked on the pile cover 3 by a lock, and the top cover 8 blocks the top opening of the peripheral ring 302, forming a closed installation space between the pile cover 3, the top cover 8 and the peripheral ring 302.

[0049] The insulating plate 11 is a plastic plate or a ceramic plate, and the insulating plate 11 is provided with a test terminal post 111, which is a metal conductive post. The insulating plate 11 is installed in the installation space. The inside of the screw rod 4 is hollow to form a long hole, which penetrates both ends of the screw rod 4, and the tracer wire 15 is inserted into the long hole. In order to achieve good insulation effect, the long hole of the screw rod 4 is coated with insulating paint or rubber skin, so that the tracer wire 15 is insulated from the screw rod 4. After the tracer wire 15 penetrates the insulating plate 11, it is electrically connected to the test terminal post 111.

[0050] The test pile is transported by disassembling and transporting each component separately. When reaching the installation position, the screw rod 4 is first inserted into the pile body 2 and penetrates the reinforcement plate group inside the pile body 2, then two first nuts 5 are installed, the two first nuts 5 lock the screw rod 4 to the reinforcement plate group, then the bottom of the pile body 2 is inserted into the slot 101 on the pile base 1, so that the bottom of the screw rod 4 penetrates the slot bottom of the slot 101 and extends into the counterbore 102, then the second nut 6 is screwed on the screw rod 4, the second nut 6 locks the screw rod 4 to the pile base 1, so that the pile base 1 and the pile body 2 are connected together, then the pile cover 3 is placed on the top of the pile body 2, so that the top of the screw rod 4 penetrates the slot bottom of the slot body 301 on the pile cover 3 and extends into the slot body 301, then the third nut 7 is screwed on the screw rod 4, the third nut 7 locks the screw rod 4 to the pile cover 3, so that the pile cover 3 and the pile body 2 are connected together, and then the pile cover 3, the pile body 2 and the pile base 1 are stably connected together, then the tracer line 15 is passed through the long through hole inside the screw rod 4 from bottom to top, and the top end of the tracer line 15 extends into the slot body 301, then the top end of the tracer line 15 is connected to the test terminal 111 on the insulating plate 11, and then the insulating plate 11 is placed on the top surface of the pile cover 3, and then the top cover 8 is placed on the top of the peripheral ring 302 on the pile cover 3 and locked by the lock, at this time, the peripheral ring 302 and the top cover 8 form a cover shell covering the slot body 301, so that the third nut 7 is located in a closed space, and finally the pile base 1 is placed in the installation position and buried underground, so that the pile body 2 and the pile cover 3 are located above the ground. Optionally, a gas pipeline related sign and a corresponding warning slogan can be provided on the outer wall of the pile body 2.

[0051] Through the above structure, the tracer line test pile provided by the embodiment stably connects the pile cover 3, the pile body 2 and the pile base 1 together to form a whole by means of the screw rod 4, the first nut 5, the second nut 6 and the third nut 7, wherein the third nut 7 is located in the pile base 1, and when the pile base 1 is buried in the ground, the third nut 7 is also located underground, the second nut 6 is located inside the pile body 2, and the third nut 7 is located inside the cover shell, so that the first nut 5, the second nut 6 and the third nut 7 are not exposed, avoiding corrosion caused by wind and sun, and the lock makes the top cover 8 and the pile cover 3 only openable when the staff holds the corresponding key, which, combined with the first nut 5, the second nut 6 and the third nut 7 inside, better plays a theft-proof effect, the outer surface of the test pile does not need to be provided with a small hole, so that the whole is more integral and more beautiful. When the tracer line 15 needs to be tested, the top cover 8 is opened by the key, the test equipment (such as a signal receiver) is connected to the test terminal 111, and then the tracer line 15 is tested, and after the test is completed, the top cover 8 is closed.

[0052] Optionally, a rubber plug 14 is inserted into the hole 102 to seal the hole 102. Before the pile cap 1 is buried into the ground, the rubber plug 14 is inserted into the hole 102 so that the third nut 7 is located in a relatively closed space. The tracer wire 15 penetrates the rubber plug 14.

[0053] In particular, the insulating plate 11 is installed in an insulating mounting block 12. Optionally, the top surface of the insulating mounting block 12 is provided with a mounting opening, and the insulating plate 11 is installed in the mounting opening. The mounting opening is a circular hole, and the insulating plate 11 is a circular plate matching the mounting opening. The insulating plate 11 is placed in the mounting opening. The top surface of the pile cap 3 is further provided with an inner ring 303 located inside the outer ring 302 and coaxial with the groove 301. The groove 301 is located inside the inner ring 303. In this embodiment, the insulating mounting block 12 matches the inner ring 303. The insulating mounting block 12 is placed in the inner ring 303. The insulating mounting block 12 overlaps the top surface of the pile cap 3 and seals the groove of the groove 301. In this way, the third nut 7 can be better hidden. The inner ring 303 positions and limits the insulating mounting block 12, so that the position of the insulating plate 11 in the outer ring 302 is fixed. Before the top cover 8 is installed, the insulating plate 11 is installed in the mounting opening of the insulating mounting block 12. Then, the insulating mounting block 12 is installed in the inner ring 303. Finally, the top cover 8 is installed. It should be noted that the tracer wire 15 penetrates the insulating mounting block 12 and the insulating plate 11 and is electrically connected to the test terminal 111.

[0054] Optionally, a plurality of reinforcing blocks 304 are connected between the inner ring 303 and the outer ring 302 on the top surface of the pile cap 3. The reinforcing blocks 304 are integrally formed with the pile cap 3, the inner ring 303, and the outer ring 302 to enhance the structural strength of the entire pile cap 3. A mounting hole is formed in the top surface of one of the reinforcing blocks 304. The lock includes a lock cylinder 10 for inserting a key and a lock shell 9 cooperating with the lock cylinder 10 to lock. The lock shell 9 is installed in the mounting hole, and the lock cylinder 10 is installed in the lock cover. When the top cover 8 is installed on the pile cap 3, the lock cylinder 10 is inserted into the lock shell 9 and locked. The lock cylinder 10 has a key hole. When the key is inserted into the key hole, the lock cylinder 10 and the lock shell 9 are unlocked, and the top cover 8 can be removed from the pile cap 3.

[0055] Optionally, the top cover 8 in this embodiment includes a first plate 801 and a second plate 802, wherein:

[0056] The first plate 801 is overlapped on the inner ring 303 and the reinforcing plate, and is located in the outer ring 302, the first plate 801 is matched with the outer ring 302, and the lock core 10 is installed on the first plate 801. The second plate 802 is overlapped on the top surface of the outer ring 302, and the clamping plate 803 is protruded on one side surface of the second plate 802, and is inserted and clamped on the top opening of the outer ring 302. The second plate 802 can effectively avoid the first plate 801 and the lock from being exposed. The second plate 802 and the clamping plate 803 in the embodiment can be rubber plates, the clamping plate 803 is installed in the outer ring 302 in the interference fit mode, and rainwater can be effectively prevented from entering the outer ring 302. More preferably, the sealing ring 13 is further arranged between the first plate 801 and the top surface of the inner ring 303, so that water or water vapor in the outside can be prevented from entering the groove 301.

[0057] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, and all of them should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A tracer wire test pile characterized by, The utility model relates to a tracer wire test pile, which comprises a pile base provided with a slot at the top and a counterbore at the bottom surface; a pile body in the shape of a cylinder with a through hole at the top and bottom ends, the inside of the pile body being provided with a reinforcing plate group for increasing structural strength, the bottom of the pile body being inserted into the slot; a pile cover being fastened to the top of the pile body, the pile cover being provided with a groove protruding towards the inside of the pile body, the top surface of the pile cover being provided with a peripheral ring at the edge; a screw rod penetrating through the reinforcing plate group, the screw rod being screwed with two first nuts, the two first nuts being respectively located at the two sides of the reinforcing plate group and being used for locking the screw rod to the reinforcing plate group, the bottom of the screw rod penetrating through the bottom of the slot and extending into the counterbore, the screw rod being screwed with a second nut, the second nut being located in the counterbore and being used for locking the screw rod to the pile base, the top of the screw rod penetrating through the bottom of the groove and extending into the groove, the screw rod being further screwed with a third nut, the third nut being located in the groove and being used for locking the screw rod to the pile cover; a top cover being locked to the pile cover by a lock, an enclosed installation space being formed between the pile cover, the top cover and the peripheral ring; an insulating plate being installed in the installation space, the insulating plate being provided with a test terminal post, the inside of the screw rod being hollow to form a long through hole, a tracer wire being inserted into the long through hole and being electrically connected to the test terminal post after penetrating through the insulating plate.

2. The tracer wire test pile according to claim 1, wherein: the top surface of the pile cover is further provided with an inner peripheral ring, the inner peripheral ring being located inside the peripheral ring, and the groove being located inside the inner peripheral ring; the tracer wire test pile further comprises an insulating mounting block adapted to the inner peripheral ring, the top surface of the insulating mounting block being provided with a mounting opening, the insulating plate being installed in the mounting opening, the insulating mounting block being installed in the inner peripheral ring and covering the opening of the groove, and the tracer wire penetrating through the insulating mounting block.

3. The tracer wire test pile according to claim 2, wherein: a plurality of reinforcing blocks for increasing structural strength are arranged between the inner peripheral ring and the peripheral ring, the top surface of one of the reinforcing blocks being provided with a mounting hole, the lock comprising a lock cylinder for inserting a key and a lock shell cooperating with the lock cylinder to lock, the lock shell being installed in the mounting hole, and the lock cylinder being installed in the top cover; the top cover comprises: a first plate being overlapped on the inner peripheral ring and the reinforcing block, the first plate being located inside the peripheral ring, and the lock cylinder being installed in the first plate; and a second plate, one side of the second plate being provided with a clamping plate, the second plate being overlapped on the top surface of the peripheral ring, and the clamping plate being inserted into and clamped at the top opening of the peripheral ring.

5. The tracer wire test pile according to claim 4, wherein: a sealing ring is further installed between the first plate and the top surface of the inner peripheral ring; the reinforcing plate group comprises: a plurality of flat plates being fixedly arranged in the inside of the pile body, the flat plates being uniformly distributed along the length direction of the pile body, the flat plates being provided with a central hole, and the screw rod being inserted into the central hole. ​ ​ ​ ​ ​ ​ ​ ​ 4. The tracer wire test pile of claim 3, wherein, ​ ​ ​ ​ ​ 6. The tracer wire test pile according to any one of claims 1-5, characterized in that, ​ ​ 7. The tracer wire test pile according to any one of claims 1-5, characterized in that: a rubber plug is inserted in the counterbore for plugging the counterbore, the tracer wire penetrating the rubber plug.

Images