CN111238870A - Geological survey device - Google Patents

Abstract

The invention relates to the field of geological survey, and discloses a geological survey device which comprises a bearing frame and a soil taking mechanism which is connected to the central position of the bearing frame in a penetrating way, wherein the top end of the soil taking mechanism is connected with a driver, the device realizes the function of directly taking out the amount of soil by drilling into a large depth through the matching of a spiral soil taking column and a drilling outer sleeve, the condition that the soil falls off due to mechanical shaking is avoided easily in the soil taking process even if the viscosity of the soil at the drilling position is low, and meanwhile, the lengths of the spiral soil taking column and the drilling outer sleeve can be adjusted in real time according to the spiral columns and the sub sleeves, so that the application range of the device is wider.

Description

A geological survey device

technical field

The invention relates to the field of geological survey, in particular to a geological survey device.

Background technique

"Geological exploration" refers to the investigation and exploration of the geology through various means and methods, to determine the appropriate bearing layer, to determine the foundation type and to calculate the basic parameters according to the bearing capacity of the bearing layer. Mineral deposits of industrial significance are found in the mineral census, in order to identify the quality and quantity of minerals, as well as the technical conditions for mining and utilization, to provide mineral reserves and geological data required for mine construction and design, and to analyze the rocks, strata, structures, Minerals, hydrology, landforms and other geological conditions are surveyed and researched. Usually, when conducting geological surveys, topographic surveys and land surveys are often carried out with the help of surveying devices.

At present, the common survey devices are generally faced with the problem that they often use drilling to take out part of the soil for testing during geological surveys. However, due to the complex underground soil conditions in some areas, once there is more sand in the drilling position, the sand is sticky. Low, when the sand is easily shaken during the extraction process, it will fall and leak out of the soil extraction mechanism, which will affect the subsequent inspection.

SUMMARY OF THE INVENTION

To this end, the embodiment of the present invention provides a geological survey device to solve the problem that in the prior art, due to the low viscosity of sand and soil, when the sand is easily shaken during the extraction process, the phenomenon of falling and leaking out of the soil extraction mechanism occurs, resulting in subsequent follow-up. Check for affected issues.

In order to achieve the above object, embodiments of the present invention provide the following technical solutions:

A geological survey device comprises a carrier and an earth borrowing mechanism connected through the center of the carrier, and a driver is connected to the top of the earth borrowing mechanism;

The soil borrowing mechanism includes a drilling casing threadedly connected to the center of the bearing frame and a screw borrowing column directly connected with the driver output shaft. An underground driving plate, the driving plate is located on the upper surface of the carrier, and a limit frame for limiting the position of the driving plate is installed on the upper surface of the carrier, and the screw borrowing column is sleeved on the Drilling into the inner side of the casing, and one end of the screw borrowing column close to the driver is connected with the inner wall of the end of the drilling casing;

The drilling casing includes a main casing arranged through the center of the bearing frame, an extension casing is connected to one end of the main casing close to the driver, and the side wall of the other end of the main casing is provided with an entry hole, and the main casing is close to the driver. One end side wall of the driver is provided with a component slot, and a push spring is installed on the inner wall of the component slot, and one end of the push spring away from the main sleeve is installed with a limit block for limiting the position of the extension sleeve, the extension sleeve is far away from the main sleeve. One end of the sleeve is connected with a discharge cover through a thread, and the end of the discharge cover away from the extension sleeve is directly connected to the driver;

The spiral borrow column includes a main borrow column and a separate borrow column that are sleeved in the main casing. One end of the main borrow column close to the driver is provided with an embedded groove, and the other end of the main borrow column is provided with an embedded groove. There is a movable groove, and a sweeping mechanism for sweeping away gravel is installed in the movable groove. The tank and the discharge cover are connected;

One end of the discharge cover close to the extension sleeve is provided with a stepped hole with internal threads, a fixed block hole is opened on the inner wall of the stepped hole, and a discharge hole communicated with the stepped hole is provided above the fixed block hole .

As a preferred solution of the present invention, the extension sleeve includes two sub-sleeves with the same structure, which are connected end to end and form a vertical shape. The inner wall of the groove is provided with an accommodating hole for accommodating the restriction block, the outer side wall of the other end of the sub-sleeve is provided with a screw-in groove, the side wall of the screw-in groove is provided with a limit-block groove, and the inner wall of the block-restriction groove is opened. A fixing block is installed by the pushing elastic piece.

As a preferred solution of the present invention, the soil extraction column includes two spiral columns with the same structure and connected end to end to form a vertical shape, one end of the spiral column is provided with a connecting groove, and the spiral column is The other end is installed with a connecting convex column embedded in the connecting groove, and a spiral strip is installed on the side wall of the spiral column.

As a preferred solution of the present invention, a locking groove is formed on the side wall of the connecting boss, a push-out spring is installed on the inner wall of the locking groove, and a locking groove is installed at the end of the push-out spring away from the locking groove. The side wall of the connecting groove is provided with a locking hole for accommodating the locking table.

As a preferred solution of the present invention, the sweeping mechanism includes a shock-absorbing spring installed on the inner wall of the movable groove and a frustum cover connected to the end face of the main borrow column, and is arranged through the side wall of the frustum cover There are several inclined plates, a push column is installed at one end of the shock-absorbing spring away from the movable groove, and a push plate connected with the surface of the inclined plate is installed at the end of the push column away from the shock-absorbing spring.

As a preferred solution of the present invention, the inclined sheet has a T-shaped structure.

Embodiments of the present invention have the following advantages:

The equipment realizes the function of directly taking out as much soil as the drilling depth through the cooperation of the spiral soil borrowing column and the drilling jacket. The soil falls due to shaking. At the same time, the length of the screw borrow column and the drilled casing can be adjusted in real time according to the screw column and the sub-set, so that the equipment can be used in a wider range;

In addition, the equipment can also sweep away the gravel at the drilling position through the sweeping mechanism, so that there will not be a large number of large particles of gravel in the soil taken out at the end, which not only improves the service life of the equipment, but also avoids the inconvenience of soil sampling. Full or the equipment is stuck with gravel.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are required to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, other implementation drawings can also be obtained according to the extension of the drawings provided without creative efforts.

The structures, proportions, sizes, etc. shown in this specification are only used to cooperate with the contents disclosed in the specification, so as to be understood and read by those who are familiar with the technology, and are not used to limit the conditions for the implementation of the present invention, so there is no technical The substantive meaning above, any modification of the structure, the change of the proportional relationship or the adjustment of the size should still fall within the technical content disclosed in the present invention without affecting the effect and the purpose that the present invention can produce. within the range that can be covered.

1 is a schematic diagram of the overall structure of an embodiment of the present invention;

Fig. 2 is an enlarged view at A in Fig. 1;

3 is a schematic structural diagram of a restriction block according to an embodiment of the present invention;

4 is a schematic structural diagram of the main borrow column and the spiral column according to the embodiment of the present invention when they are installed;

5 is a schematic structural diagram of a discharge cover according to an embodiment of the present invention;

6 is a schematic structural diagram of a spiral borrow column according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a split structure according to an embodiment of the present invention.

In the picture:

1-carrying frame; 2-borrowing mechanism; 3-driver; 4-drilling into the outer casing; 5-spiral borrowing column; 6-driving disc; 7-limiting frame; 8-sweeping mechanism;

401-Main sleeve; 402-Extension sleeve; 403-Component slot; 404-Push shrapnel; 405-Restriction block; 406-Discharge cover; 407-Separate sleeve; 408-Inner groove; Screw-in slot; 411-block slot; 412-fixed block; 413-step hole; 414-fixed block hole; 415-discharge hole; 416-entry hole;

501-Main borrow column; 502-Separate borrow column; 503-Embedding groove; 504-Active groove; 505-Spiral column; 506-Connecting groove; 507-Connecting convex column; Slot; 510 - push-out spring; 511 - locking table; 512 - locking hole;

801-shock spring; 802-truncated cone; 803-inclined piece; 804-push column; 805-push piece.

Detailed ways

The embodiments of the present invention are described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIG. 1 , the present invention provides a geological survey device, which can realize the function of directly extracting as much soil as the depth of the drilling through the cooperation of the spiral soil borrowing column 5 and the drilling casing 4, and also through the The sweeping mechanism 8 is used to sweep away the gravel at the drilling position, so as to improve the service life of the equipment, and at the same time, it can also prevent a large number of large particles of gravel in the soil taken out at the end, thereby avoiding insufficient soil sampling or being covered by rocks. A situation in which the gravel jams the device.

The geological survey device of this embodiment includes a carrying frame 1 and an earth borrowing mechanism 2 connected through the center of the carrying frame 1. A driver 3 is connected to the top of the earth borrowing mechanism 2, and the driver 3 can be selected from a commonly used small The motor, because the drilling mechanism of the equipment (that is, the mechanism wrapped by the soil) is mainly drilled into the outer casing 4, so the small motor will not be stuck, and as shown in Figure 1, it is above the driver 3. Parts such as optical prisms are installed to play the role of positioning, and the mechanism here can also be selected not to be installed.

As shown in FIG. 1 , the soil extraction mechanism 2 includes a drilling jacket 4 that is threadedly connected to the center of the carrier 1 (the threaded connection of the drilling jacket 4 to the carrier 1 can ensure that after the driving disc 6 is started, it can be carried smoothly. The drilling casing 4 is drilled into or out of the formation) and the screw borrow column 5 is directly connected with the output shaft of the driver 3. The outer side of the drilling casing 4 is sleeved with a screw for driving the drilling casing 4 to drill into the ground. The drive plate 6 can be driven by a motor. The drive plate 6 is located on the upper surface of the carrier frame 1 , and a limit frame for limiting the position of the drive plate 6 is installed on the upper surface of the carrier frame 1 7. The limit frame 7 is used to limit the position of the driving disk 6, so that the driving disk 6 will not be driven by the drilling jacket 4 to move up and down, and the screw borrow column 5 is sleeved on the drilling jacket. 4, and the end of the screw borrow column 5 close to the driver 3 is connected to the inner wall of the end of the drilling casing 4.

When the equipment is in use, the appropriate length of drilling casing 4 and spiral borrow column 5 can be selected and installed according to the drilling depth (due to the special soil environment in some drilling areas, different depths need to be drilled). When the equipment specifications meet the requirements, directly Start the driving disc 6 and the driver 3, at this time the driving disc 6 will rotate and drive the drilling into the outer casing 4 into the ground (the working principle of this place can refer to the lead screw, that is, the side wall of the drilling outer casing 4 is provided with the side wall of the driving disc 6. screwed threads), and during the process of drilling the casing 4 into the ground, the spiral soil extraction column 5 will also rotate to take out the soil at the drilling position in real time. When the soil is sandy, the soil will not be shaken off due to the shaking of the equipment.

As shown in FIG. 1 , FIG. 3 , FIG. 5 , FIG. 6 and FIG. 7 , the drilling casing 4 includes a main sleeve 401 disposed through the center of the carrier 1 , and one end of the main sleeve 401 close to the driver 3 is connected with a The sleeve 402 is extended, and the side wall of the other end of the main sleeve 401 is provided with an entry hole 416. The entry hole 416 is to make the soil easier to enter the main sleeve 401. The side wall of one end of the main sleeve 401 close to the driver 3 is provided with a component In the card slot 403, a push spring piece 404 is installed on the inner wall of the component card slot 403, and a limit block 405 is installed at one end of the push spring plate 404 away from the main sleeve 401 for restricting the position of the extension sleeve 402, and the extension sleeve 402 is far away from the main sleeve. One end of the sleeve 401 is screwed with a discharge cover 406, and the end of the discharge cover 406 away from the extension sleeve 402 is directly connected to the driver 3;

The length of the drilling casing 4 can be adjusted according to the needs of use. The specific operation is to directly adjust the length of the extension sleeve 402, because the extension sleeve 402 includes two parts with the same structure, which are connected end to end and form a vertical shape. Sleeve 407, the inner wall of one end of the sub-sleeve 407 close to the main sleeve 401 is provided with an inner groove 408, and the inner wall of the inner groove 408 is provided with an accommodating hole 409 for accommodating the restriction block 405, and the other end of the sub-sleeve 407 is provided A screw-in groove 410 is formed on the outer side wall, a limiting block groove 411 is set on the side wall of the screw-in groove 410, and a fixing block 412 is installed on the inner wall of the block-limiting groove 411 through the pushing elastic piece 404. The structure of the block 412 is the same as that of the limiting block 405, and the working principle is also the same, both to avoid the situation that when the extension sleeve 402 is assembled or after the extension sleeve 402 is assembled with the main sleeve 401, it will automatically disperse under the action of external force. occur.

Therefore, only the end with the inner groove 408 on the first sub-sleeve 407 and the end with the screw-in groove 410 on the second sub-sleeve 407 are spliced together correspondingly. The end-to-end connection is formed in a vertical shape. When the first sub-sleeve 407 and the second sub-sleeve 407 are about to be screwed together and cannot move, the inner wall of the inner groove 408 will squeeze the fixing block 412, so that the fixing block 412 and the Pushing the elastic piece 404 is compressed so as to completely enter the block-restricting groove 411, and after the receiving hole 409 on the inner wall of the inner groove 408 contacts the fixing block 412, the pushing elastic piece 404 will reset and push the fixing block 412 into the receiving hole 409, After that, the two sub-sleeves 407 can no longer continue to move (that is, whether they move along the thread direction between the two sub-sleeves 407 or against the thread direction between the two sub-sleeves 407, due to the existence of the fixed block 412 Therefore, the two sub-sleeves 407 will no longer move with each other, and once the sub-sleeves 407 need to be removed, it is only necessary to push the fixing block 412 through the external hard object and slide it into the block-limiting groove 411 again).

After the length of the extension sleeve 402 is spliced, the end of the extension sleeve 402 with the inner groove 408 and the end of the main sleeve 401 with the restriction block 405 can be screwed together. The block 405 will be snapped into the accommodating hole 409 under the action of pushing the elastic piece 404, so as to limit the extension sleeve 402 and the main sleeve 401, and finally connect the discharge cover 406 with the other end of the extension sleeve 402. One end of the material cover 406 close to the extension sleeve 402 is provided with a stepped hole 413 with internal threads, a fixed block hole 414 is opened on the inner wall of the stepped hole 413, and a fixed block hole 414 is provided above the fixed block hole 413. Connected with the stepped hole 413 Therefore, the discharge cover 406 is directly screwed to the end of the extension sleeve 402, and the position is fixed through the fixed block hole 414 (the principle of fixing can refer to the fixing between the two sub-sleeves 407), After it is fixed, connect the driver 3 to the unloading cover 406, and then install the screw borrowing column 5, and then it can be used (the structure after the connection is completed, as shown in Figure 6, and when moving, the unloading The cover 406 will rotate, but the driver 3 will not move easily, but the motor in the driver 3 will move with the screw rod 5). When the equipment is in use, the soil brought out by the screw rod 5 will pass through the discharge hole 415. It leaks directly, so in order to avoid soil splashing around, a guide strip can be installed at the discharge hole 415 .

As shown in FIG. 1 and FIG. 4 , the spiral borrow column 5 includes a main borrow column 501 and a separate borrow column 502 sleeved in the main casing 401 , and the main borrow column 501 is opened at one end close to the driver 3 . There is an embedded groove 503, and the other end of the main borrow column 501 is provided with a movable groove 504. A sweeping mechanism 8 for sweeping away gravel is installed in the movable groove 504. Inside the extension sleeve 402 , the two ends of the soil separation column 502 are respectively connected with the embedding groove 503 and the discharge cover 406 .

The structure of the helical borrowing column 5 can be changed with the length of the drilling casing 4. During the specific implementation, a suitable length of the dividing borrowing column 502 can be directly inserted into the embedding groove 503. In this way, the strength of the connection can be made larger), when the equipment is in use, once the drilling casing 4 and the screw borrow column 5 are drilled into the ground, the sweeping mechanism 8 will perform the cleaning operation at the same time, so that the drilling casing 5 is drilled. 4. The large-grained gravel directly below is swept away to improve the service life of the equipment, and at the same time, there will be no large-scale gravel in the soil taken out at the end, thus avoiding insufficient soil sampling or being stuck by gravel. live equipment.

Therefore, when the device is in use, it can not only achieve the purpose of taking out how much soil it is drilled into in real time, but also compared with the prior art, such as a fully automatic soil borrower disclosed in CN203561523U, which can also be used when in use. The length can be freely assembled, so that the equipment can be used in a wide range, and when the device is drilled into the soil, it can also use the sweeping mechanism 8 to sweep away the gravel in front of the device, so that the equipment will not appear belt during use. When the equipment is passed through the gravel-heavy area, it can be brought into the soil normally without being affected by the gravel.

The soil extraction column 502 includes two spiral columns 505 with the same structure, which are connected end to end and form a vertical shape. One end of the spiral column 505 is provided with a connecting groove 506, and the other end of the spiral column 505 is installed with a connecting groove 506. The connecting convex column 507 embedded in the connecting groove 506 has a spiral bar 508 installed on the side wall of the spiral column 505. After the spiral column 505 is installed, the two spiral bars 508 and the side wall of the main borrow column 501 The helical strip 508 can form a complete helical ring strip, and its specific structure can be referred to as shown in FIG. 6 .

When adjusting the length of the soil extraction column 502, only screw the connecting convex column 507 on the first spiral column 505 into the connecting groove 506 on the second spiral column 505, and then screw the second spiral column 505 into the connecting groove 506 on the second spiral column 505. The connecting boss 507 on the column 505 is screwed into the embedding groove 503 at the end of the main borrow column 501 to realize the initial fixation. Because the side wall of the connecting boss 507 is provided with a locking groove 509, the locking groove A push-out spring 510 is installed on the inner wall of 509, a locking table 511 is installed at one end of the push-out spring 510 away from the locking groove 509, and a locking hole for accommodating the locking table 511 is opened on the side wall of the connecting groove 506. 512, so when the connecting protrusion 507 is screwed into the connecting groove 506, the locking table 511 can be pressed first to push the push-out spring 510 into the locking groove 509, so that the connecting protrusion 507 can be screwed in normally , and when the connecting boss 507 moves with the locking table 511 to the locking hole 512, the locking table 511 will be pushed out by the push-out spring 510 and then snapped into the locking hole 512, so as to play the role of fixing again ( The connection method of the entire spiral borrow column 5 adopts the above two fixing methods to make the service life of the equipment longer).

As shown in FIGS. 1 and 2 , the sweeping mechanism 8 includes a damping spring 801 installed on the inner wall of the movable groove 504 and a frustum cover 802 connected to the end face of the main borrow column 501 . The side wall of 802 is provided with several inclined pieces 803, the end of the shock-absorbing spring 801 away from the movable slot 504 is installed with a push column 804, and the end of the push column 804 away from the shock-absorbing spring 801 is installed with the surface of the inclined plate 803. The pusher piece 805 is connected.

When the screw extraction column 5 starts to rotate, the frustum cover 802 will be stuck into the soil first, and the inclined piece 803 will be pushed by the soil to slide into the frustum cover 802. At this time, the pressing piece 805 will be squeezed to push As the push column 804 slides into the movable groove 504, the damping spring 801 will also be squeezed to achieve the effect of damping, and the truncated cone 802 rotates with the inclined piece 803. The stones are swept away to avoid the unqualified samples taken out at the end.

The inclined piece 803 has a T-shaped structure, so that the inclined piece 803 can be fully stuck inside the frustum cover 802 without being easily pushed out of the frustum cover 802 by the pushed piece 805, and the main sleeve 401 is close to the frustum cover 802. One end side wall of the table cover 802 is an inclined surface, which can facilitate the main casing 401 to be drilled into the ground.

Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made on the basis of the present invention, which will be obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention fall within the scope of the claimed protection of the present invention.

Claims (6)

1. The geological survey device is characterized by comprising a bearing frame (1) and a soil taking mechanism (2) which is connected to the center of the bearing frame (1) in a penetrating manner, wherein a driver (3) is connected to the top end of the soil taking mechanism (2);

the soil taking mechanism (2) comprises a drilling outer sleeve (4) which is in threaded connection with the center of the bearing frame (1) and a spiral soil taking column (5) which is directly connected with an output shaft of the driver (3), a driving disc (6) which is used for driving the drilling outer sleeve (4) to drill underground is sleeved on the outer side of the drilling outer sleeve (4), the driving disc (6) is located on the upper surface of the bearing frame (1), a limiting frame (7) which limits the driving disc (6) is installed on the upper surface of the bearing frame (1), the spiral soil taking column (5) is sleeved on the inner side of the drilling outer sleeve (4), and one end, close to the driver (3), of the spiral soil taking column (5) is connected with the inner wall of the end part of the drilling outer sleeve (4);

the drilling outer sleeve (4) comprises a main sleeve (401) which penetrates through the center of the bearing frame (1), one end, close to the driver (3), of the main sleeve (401) is connected with an extension sleeve (402), an access hole (416) is formed in the side wall of the other end of the main sleeve (401), one end, close to the driver (3), of the main sleeve (401) is provided with a component clamping groove (403), the inner wall of the component clamping groove (403) is provided with a pushing elastic sheet (404), one end, far away from the main sleeve (401), of the pushing elastic sheet (404) is provided with a limiting block (405) used for limiting the position of the extension sleeve (402), one end, far away from the main sleeve (401), of the extension sleeve (402) is connected with a discharging cover (406) through threads, and one end, far away from the extension sleeve (402), of the discharging cover (406) is directly connected with the driver (;

the spiral soil taking column (5) comprises a main soil taking column (501) and a branch soil taking column (502) which are sleeved in a main sleeve (401), an embedded groove (503) is formed in one end, close to the driver (3), of the main soil taking column (501), a movable groove (504) is formed in the other end of the main soil taking column (501), a sweeping mechanism (8) used for sweeping gravel is installed in the movable groove (504), the branch soil taking column (502) is located in the extension sleeve (402), and two ends of the branch soil taking column (502) are respectively connected with the embedded groove (503) and the discharging cover (406);

one end of the discharging cover (406) close to the extension sleeve (402) is provided with a stepped hole (413) with threads arranged inside, the inner wall of the stepped hole (413) is provided with a fixed block hole (414), and a discharging hole (415) communicated with the stepped hole (413) is arranged above the fixed block hole (414).

2. The geological survey device according to claim 1, wherein the extension sleeve (402) comprises two sub-sleeves (407) which have the same structure and are connected end to form a vertical shape, an inner groove (408) is formed in one end of each sub-sleeve (407) close to the main sleeve (401), an accommodating hole (409) for accommodating the limiting block (405) is formed in the inner wall of the inner groove (408), a screwed groove (410) is formed in the outer side wall of the other end of each sub-sleeve (407), a limiting block groove (411) is formed in the side wall of the screwed groove (410), and a fixing block (412) is installed on the inner wall of the limiting block groove (411) through the pushing elastic sheet (404).

3. A geological survey according to claim 1, characterized in that said column (502) comprises two vertically arranged spiral columns (505) of the same structure connected end to end, said columns (505) being provided with a connecting groove (506) at one end, and said columns (505) being provided with a connecting post (507) at the other end, said connecting post being embedded in said connecting groove (506), and said spiral bars (508) being mounted on the side wall of said columns (505).

4. A geological survey device as claimed in claim 3, wherein the side wall of said connecting convex pillar (507) is provided with a locking groove (509), the inner wall of said locking groove (509) is provided with a push-out spring (510), one end of said push-out spring (510) far away from said locking groove (509) is provided with a locking platform (511), and the side wall of said connecting groove (506) is provided with a locking hole (512) for accommodating said locking platform (511).

5. A geological survey according to claim 1, characterized in that said sweeping mechanism (8) comprises a shock-absorbing spring (801) mounted on the inner wall of the movable trough (504) and a frustum cover (802) connected with the end face of the main soil-taking pillar (501), several inclined plates (803) are arranged on the side wall of the frustum cover (802) in a penetrating way, a pushing pillar (804) is mounted on the end of the shock-absorbing spring (801) far away from the movable trough (504), and a pushing plate (805) connected with the surface of the inclined plate (803) is mounted on the end of the pushing pillar (804) far away from the shock-absorbing spring (801).

6. A geological survey according to claim 5, characterized in that said tilted sheets (803) are T-shaped.

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