A rapid grounding electrode device for high-density electrical prospecting instrument applicable to soft soil subgrade

Abstract

The present invention discloses a rapid grounding electrode device for a high-density electrical resistivity instrument applicable to soft soil subgrades, which relates to the field of construction technology. The device includes a bracket, on which a predetermined distance device and a pressing device are arranged; the bracket includes a left bracket and a right bracket, and a connecting rod is detachably installed between the left bracket and the right bracket. The connecting rod includes a left connecting rod and a right connecting rod; the predetermined distance device includes a plurality of centering sleeves, and each centering sleeve includes a left centering sleeve and a right centering sleeve that are buckled with each other. The left centering sleeve is installed on the left connecting rod with adjustable spacing, and the right centering sleeve is installed on the right connecting rod with adjustable spacing; the pressing device includes a pressing plate located above the electrode nail, and sliders are respectively fixed at both ends of the pressing plate. The sliders are correspondingly slidably installed on the left bracket or the right bracket, and a manual driving device is arranged on the sliders. By providing centering sleeves with adjustable spacing, the spacing of the electrode nails can be fixed in advance before arranging the electrode nails, thereby greatly improving the working efficiency.

Description

Technical Field

[0001] The present invention relates to the field of construction technology, and particularly to a rapid grounding electrode device for a high-density electrical resistivity instrument suitable for soft soil subgrades. Background Art

[0002] During electrical resistivity prospecting, a plurality of electrode nails need to be inserted into the ground along the survey line at a certain interval, and then the main unit of the electrical resistivity instrument supplies power and measures the voltage of the electrode nails along the line. There are various specific measurement methods. At any moment, only two electrode nails are powered, with the main unit supplying positive voltage and negative voltage respectively, and the potential difference between the other two electrode nails is measured. When inserting the electrode nails, they need to be inserted one by one, and the distance between adjacent electrode nails needs to be measured and fixed, which greatly increases the workload. Therefore, during electrical resistivity prospecting, most of the workload is consumed in the arrangement of the electrodes, consuming a large amount of manpower and material resources. Summary of the Invention

[0003] The purpose of the present invention is to provide a rapid grounding electrode device for a high-density electrical resistivity instrument suitable for soft soil subgrades. By setting a pressing plate and a centering sleeve, the simultaneous insertion of multiple electrode nails is achieved, greatly improving the work efficiency.

[0004] To achieve the above purpose, the technical solution of the present invention is as follows:

[0005] A rapid grounding electrode device for a high-density electrical resistivity instrument suitable for soft soil subgrades includes a bracket. A preset distance device and a downward pressing device are provided on the bracket. The bracket includes a left bracket and a right bracket. A connecting rod is detachably installed between the left bracket and the right bracket. The connecting rod includes a left connecting rod and a right connecting rod. The preset distance device includes a plurality of centering sleeves. The centering sleeve includes a left centering sleeve and a right centering sleeve that are buckled with each other. The left centering sleeve is installed on the left connecting rod with adjustable spacing, and the right centering sleeve is installed on the right connecting rod with adjustable spacing. The left centering sleeve and the right centering sleeve are buckled with each other to form a ring, and the electrode nail is inserted into the ring. The downward pressing device includes a pressing plate located above the electrode nail. A manual driving device is connected to the pressing plate, and the manual driving device drives the pressing plate to press downward.

[0006] Wherein, the manual driving device includes a lead screw rotatably installed on the left bracket or the right bracket. A handwheel is provided above the lead screw. Both ends of the pressing plate are respectively fixed with sliders. The sliders are correspondingly slidably installed on the left bracket or the right bracket. A lead screw nut is provided on the slider, and the lead screw nut is slidably installed on the lead screw.

[0007] Wherein, the manual driving device includes a lead screw rotatably installed on the top of the pressing plate. A handwheel is provided above the lead screw. A threaded hole that is threadedly engaged with the lead screw is provided on the left bracket or the right bracket.

[0008] Wherein, the connecting rod is provided with a size mark.

[0009] In which, an automatic distance adjusting device is provided on the connecting rod, and the automatic distance adjusting device includes a connecting rod assembly. A group of the connecting rod assemblies are respectively installed on the left connecting rod and the right connecting rod. The connecting rod assembly includes a plurality of first connecting rods hinged to each other. The central hinge point of the first connecting rod is fixed to the left straightening sleeve or the right straightening sleeve. One end of the connecting rod assembly is fixed to the left connecting rod or the right connecting rod, and the other end is hinged to a sliding point. The sliding point is slidably installed on the left connecting rod or the right connecting rod. A positioning pin is arranged between the sliding point and the corresponding left connecting rod or the right connecting rod.

[0010] Among them, the pressure plate includes a left pressure plate and a right pressure plate arranged opposite to each other, the left pressure plate and the right pressure plate are provided with clamping grooves opposite to each other, the top protrusion of the electrode is arranged in the clamping groove, the left pressure plate and the right pressure plate are provided with clamping devices, the clamping devices clamp or release the left pressure plate and the right pressure plate, the clamping device includes a first chuck and a second chuck slidably mounted on the slider, the left pressure plate is fixed on the first chuck, the right pressure plate is fixed on the second chuck, and a clamping drive is arranged between the first chuck and the second chuck.

[0011] Among them, the clamping drive includes a sliding rod fixed on the first chuck, the axis of the sliding rod is consistent with the sliding direction of the first chuck, and the second chuck is provided with a through hole for the sliding rod to pass through, and a baffle is fixed to the end of the sliding rod passing through the first chuck, and a cam is provided between the baffle and the back side of the second chuck, and the cam is rotatably mounted on the bracket, and a reset spring is provided between the first chuck and the second chuck.

[0012] Among them, the connecting rod assembly replaces the left connecting rod and the right connecting rod, and the connecting rod assembly includes a plurality of connecting rod units hinged to each other. The connecting rod unit includes two first connecting rods that cross each other. The two first connecting rods that cross each other are hinged through a central hinge point. The central hinge point fixes the left righting sleeve or the right righting sleeve. The two ends of the connecting rod assembly are respectively hinged to the left bracket and the right bracket. A telescopic rod is arranged between the left bracket and the right bracket, and the left pressure plate and the right pressure plate are spliced ​​together.

[0013] Wherein, the telescopic rod is provided with a size mark.

[0014] After adopting the above technical solution, the beneficial effects of the present invention are:

[0015] A rapid grounding electrode device for a high-density electrical resistivity instrument applicable to soft soil subgrades according to the present invention comprises a bracket, on which a predetermined distance device and a pressing device are arranged; the bracket includes a left bracket and a right bracket, and a connecting rod is detachably installed between the left bracket and the right bracket. The connecting rod includes a left connecting rod and a right connecting rod; the predetermined distance device includes a plurality of centering sleeves, and each centering sleeve includes a left centering sleeve and a right centering sleeve that are buckled with each other. The left centering sleeve is installed on the left connecting rod with adjustable spacing, and the right centering sleeve is installed on the right connecting rod with adjustable spacing. The left centering sleeve and the right centering sleeve are buckled with each other to form a ring, and an electrode nail is inserted into the ring; the pressing device includes a pressing plate located above the electrode nail, and a manual driving device is connected to the pressing plate. The manual driving device drives the pressing plate to press down. By providing centering sleeves with adjustable spacing, the spacing of the electrode nails can be fixed in advance before arranging the electrode nails, and then the electrode nails are inserted. First, all the electrode nails are inserted into the centering sleeves, and then the manual driving device drives the pressing plate to press down, so that the pressing plate presses on the top of the electrode nails, thereby pressing the electrode nails in the centering sleeves into the soil. Then, the left connecting rod or the right connecting rod is removed, and the device is taken off to lay the next section of the roadbed, thus greatly improving the work efficiency.

[0016] By providing dimension marks on the connecting rod, it is convenient to position the centering sleeves.

[0017] An automatic distance adjustment device is provided on the left connecting rod and the right connecting rod, so as to realize the simultaneous distance adjustment of multiple centering sleeves, greatly increasing the convenience.

[0018] By providing a clamping device, the pressure on the centering sleeve is reduced. The electrode nails are pressed down by clamping, thus ensuring the stability of the electrode nails, preventing the electrode nails from skewing, and at the same time, multiple electrode nails can be pulled out simultaneously.

[0019] A rapid grounding electrode device for a high-density electrical resistivity instrument applicable to soft soil subgrades according to the present invention solves the problem of time-consuming and laborious construction of inserting electrodes in the prior art. By providing centering sleeves with adjustable spacing, the spacing of the electrode nails can be fixed in advance before arranging the electrode nails, and then the electrode nails are inserted. First, all the electrode nails are inserted into the centering sleeves, and then the manual driving device drives the pressing plate to press down, so that the pressing plate presses on the top of the electrode nails, thereby pressing the electrode nails in the centering sleeves into the soil. Then, the left connecting rod or the right connecting rod is removed, and the device is taken off to lay the next section of the roadbed, thus greatly improving the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of Embodiment 1 of a rapid grounding electrode device for a high-density electrical resistivity instrument applicable to soft soil subgrades according to the present invention;

[0021] Figure 2 is a schematic structural diagram of the electrode nail in the present invention;

[0022] Figure 3 It is a schematic structural diagram of the second embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the clamping device in the third embodiment of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the fourth embodiment of the present invention;

[0025] Figure 6 is Figure 5 a partial enlarged view of A in;

[0026] In the figure: 1. Bracket, 11. Left bracket, 12. Right bracket, 13. Connecting shaft, 14. Telescopic rod, 141. Shaft cylinder, 142. Telescopic shaft, 2. Predetermined distance device, 21. Connecting rod, 211. Left connecting rod, 212. Right connecting rod, 213. Slideway, 22. Centering sleeve, 221. Left centering sleeve, 222. Right centering sleeve, 223. Guide post, 3. Pressing device, 31. Pressure plate, 311. Left pressure plate, 312. Right pressure plate, 313. Clamping groove, 32. Handwheel, 4. Electrode nail, 41. Electrode nail body, 42. Top protrusion, 5. Link assembly, 51. First link, 511. Central hinge point, 52. Sliding point, 521. Fixed plate, 6. Clamping device, 61. First chuck, 62. Second chuck, 63. Sliding rod, 64. Baffle, 65. Cam, 66. Return spring. Detailed implementation manners

[0027] The present invention will be further described below in conjunction with the drawings and embodiments.

[0028] The orientations involved in this specification are subject to the orientations shown in the drawings, which only represent relative positional relationships and do not represent absolute positional relationships.

[0029] As Figure 2 shown, the electrode nail 4 generally includes an electrode nail body 41, a top protrusion 42 is provided at the top of the electrode nail body 41, and a cable is fixed to the upper middle part of the electrode nail body 41 through an insulating layer.

[0030] The present invention is applicable to soft soil subgrades, and the ground is a flat road surface. If it is a hard soil subgrade or the ground has severe undulations, it is not applicable to the present invention.

[0031] Embodiment 1:

[0032] As Figure 1 shown, a high-density electrical method instrument quick grounding electrode device applicable to soft soil subgrades includes a bracket 1, and a predetermined distance device 2 and a pressing device 3 are arranged on the bracket 1.

[0033] The bracket 1 includes a left bracket 11 and a right bracket 12. The left bracket 11 and the right bracket 12 are connected by a connecting rod 21. The predetermined distance device 2 includes a plurality of centering sleeves 22, and the centering sleeves 22 are installed on the connecting rod 21 with adjustable spacing. The centering sleeve 22 includes a left centering sleeve 221 and a right centering sleeve 222 that are buckled with each other. The left centering sleeve 221 and the right centering sleeve 222 are buckled with each other to form a ring, and the electrode nail 4 is inserted into the ring. The connecting rod 21 includes a left connecting rod 211 and a right connecting rod 212 that are oppositely arranged. Connecting shafts 13 are oppositely arranged on the left bracket 11 and the right bracket 12. Through holes are respectively formed at both ends of the left connecting rod 211 and the right connecting rod 212. The connecting shaft 13 is inserted into the through hole, and a thread is provided at one end of the connecting shaft 13 extending out of the through hole. A nut is tightened on the connecting shaft 13, so that the left connecting rod 211 and the right connecting rod 212 are detachably and fixedly installed between the left bracket 11 and the right bracket 12.

[0034] Sliding grooves 213 are formed on the left connecting rod 211 and the right connecting rod 212. The left centering sleeve 221 is slidably installed in the sliding groove 213 of the left connecting rod 211, and the right centering sleeve 222 is slidably installed in the sliding groove 213 on the right connecting rod 212. The installation method can be that guiding columns 223 are correspondingly arranged on the sliding grooves 213 on the back surfaces of the left centering sleeve 221 and the right centering sleeve 222. The guiding columns 223 are slidably installed in the sliding grooves 213, and one end of each guiding column 223 extends out of the sliding groove 213, so as to realize the sliding installation of the left centering sleeve 221 and the right centering sleeve 222 in the corresponding sliding grooves 213.

[0035] Before inserting the electrode nail, fix the left connecting rod 211 and the right connecting rod 212 on the left bracket 11 and the right bracket 12, and then perform reasonable distance determination according to the on-site situation. According to the determined distance, adjust the position of the centering sleeve 22 in the sliding groove 213. After the position is adjusted, lock the position of the centering sleeve 22. A nut can be tightened at one end of the guiding column 223 extending out of the sliding groove 213, so as to realize the position locking of the centering sleeve 22.

[0036] In order to facilitate the distance determination of the centering sleeve 22, dimension marks are provided on the connecting rod 21, so as to fix the centering sleeve 22 according to the dimension marks.

[0037] When inserting the electrode, insert the electrode nail 4 into the centering sleeve 22 from the top of the centering sleeve 22 until the bottom tip of the electrode nail 4 abuts against the ground. In order to prevent interference of the centering sleeve 22 during downward pressing, the outer diameter of the centering sleeve 22 and the electrode nail 4 are in clearance fit, so that it does not prevent the downward pressing of the electrode nail 4 and at the same time plays a good role in centering the electrode nail 4.

[0038] Further, in order to better support the electrode nail 4, the length of the centering sleeve 22 can just abut against the ground. When the electrode nail 4 is pressed down, the ground can support the centering sleeve 22, preventing the electrode nail 4 from skewing and causing severe extrusion to the centering sleeve 22, resulting in deformation of the centering sleeve 22.

[0039] The pressing device 3 includes a pressing plate 31 located above the electrode nail 4. Sliders are respectively fixed at both ends of the pressing plate 31. The sliders are slidably installed on the left support 11 or the right support 12. A manual driving device is provided on the sliders. The manual driving device drives the sliders to slide up and down on the corresponding left support 11 or right support 12. The manual driving device includes a lead screw rotatably installed on the left support 11 or the right support 12. A lead screw nut is provided on the corresponding slider. The lead screw nut is slidably installed on the lead screw. By rotating the lead screw, the slider is driven to move up and down, thereby realizing the up and down movement of the pressing plate 31. In order to control stability, a handwheel 32 is provided above the lead screw. By rotating the handwheel 32, the slider is driven to move up and down, thereby driving the pressing plate 31 to move up and down. When the pressing plate 31 moves downward, it can press on the top protrusion 42 of the electrode nail 4, thereby pressing down all the electrode nails 4 on the device simultaneously, realizing the simultaneous insertion of multiple electrode nails 4 into the ground.

[0040] After the pressing is completed, the pressing plate 31 is raised, then the left connecting rod 211 or the right connecting rod 212 is removed from the connecting shaft 13, and the device is removed from the side of the electrode nail 4, and then the insertion work of the next section of the electrode nail 4 is carried out. When carrying out the insertion work of the next section of the electrode nail 4, only the removed left connecting rod 211 or right connecting rod 212 needs to be reinstalled on the connecting shaft 13.

[0041] Embodiment 2:

[0042] As Figure 3 shown, this embodiment is basically the same as Embodiment 1. The only difference is that when setting the distance of the centering sleeve 22 in Embodiment 1, only one centering sleeve 22 can be adjusted one by one, while in this embodiment, an automatic distance adjustment device is added on the basis of Embodiment 1, and the automatic distance adjustment of the centering sleeve 22 is realized through the automatic distance adjustment device.

[0043] The automatic distance adjustment device includes a connecting rod assembly 5 arranged between adjacent left centering sleeves 221 or adjacent right centering sleeves 222. Since the connecting rod assemblies 5 between adjacent left centering sleeves 221 or adjacent right centering sleeves 222 are the same, only the connecting rod assembly 5 between adjacent left centering sleeves 221 will be taken as an example for description below.

[0044] The connecting rod assembly 5 includes a plurality of connecting rod units hinged to each other, and the connecting rod unit includes two mutually intersecting first connecting rods 51, and the central hinge points 511 of the two mutually intersecting first connecting rods 51 are hinged, so that the connecting rod assembly 5 forms a lattice structure. The guide column 223 is fixed on the central hinge point 511 of the first connecting rod 51, one end of the connecting rod assembly 5 is fixed on the left connecting rod 211, and the other end is hinged on the sliding point 52, and the sliding point 52 is slidably installed in the slideway 213. A fixing plate 521 is provided on the outer side of the sliding point 52, and a fixing hole is provided on the fixing plate 521. A size hole corresponding to the size mark is provided on the left connecting rod 211. When the sliding point 52 slides to the corresponding size hole position, the pin shaft is inserted into the fixing hole and the size hole to achieve the locking of all the left straightening sleeves 221. The right straightening sleeve 222 is locked in the same way.

[0045] Embodiment three:

[0046] This embodiment is basically the same as the second embodiment, the only difference being that the second embodiment cannot achieve simultaneous extraction of multiple electrode nails 4. This embodiment adds a clamping device 6 on the basis of the second embodiment.

[0047] like Figure 4 As shown, the pressing plate 31 includes a left pressing plate 311 and a right pressing plate 312 which are arranged opposite to each other. The left pressing plate 311 and the right pressing plate 312 are arranged opposite to each other with a clamping groove 313, and the top protrusion 42 of the electrode pin 4 is arranged in the clamping groove 313. The left pressing plate 311 is fixed on the first clamp 61, and the right pressing plate 312 is fixed on the second clamp 62. The first clamp 61 and the second clamp 62 are slidably mounted on a slider, and a track for sliding the first clamp 61 and the second clamp 62 is arranged on the slider. A clamping drive is arranged between the first clamp 61 and the second clamp 62, and the clamping drive drives the first clamp 61 and the second clamp 62 to move toward or away from each other, thereby clamping or releasing the top protrusion 42.

[0048] The clamping drive includes a sliding rod 63 fixed on the first clamp 61, the axis of the sliding rod 63 is consistent with the sliding direction of the first clamp 61, the second clamp 62 is provided with a through hole for the sliding rod 63 to pass through, and a baffle 64 is fixed to one end of the sliding rod 63 passing through the first clamp 61, a cam 65 is provided between the baffle 64 and the back of the second clamp 62, the cam 65 is rotatably mounted on the bracket 1, and a reset spring 66 is provided between the first clamp 61 and the second clamp 62. A handle is provided at one end of the cam shaft of the cam 65 passing through the bracket 1, when the handle is turned to drive the cam 65 to rotate, the two ends of the cam 65 respectively push the baffle 64 and the second clamp 62, thereby driving the first clamp 61 and the second clamp 62 to move toward each other, thereby clamping the top protrusion 42; when the cam 65 is rotated in the reverse direction, the cam 65 no longer pushes the baffle 64 and the second clamp 62, and under the action of the reset spring 66, the first clamp 61 and the second clamp 62 move away from each other, thereby releasing the top protrusion 42.

[0049] In this embodiment, the manual driving device includes a lead screw rotatably installed on the top of the slider. Above the lead screw, there is a handwheel 32. Threaded holes that are in threaded cooperation with the lead screw are provided on the left bracket 11 or the right bracket 12. By rotating the lead screw, the lead screw is controlled to rise or fall on the left bracket 11 or the right bracket 12, thereby driving the slider to rise or fall.

[0050] When inserting the electrode nail 4, insert the electrode nail 4 into the centering sleeve 22 from the top of the centering sleeve 22. At this time, the top protrusion 42 is located between the left pressing plate 311 and the right pressing plate 312. Then control the first chuck 61 and the second chuck 62 to move towards each other to clamp the top protrusion 42. Then press down the electrode nail 4 through the pressing device 3. After the electrode nail 4 is inserted in place, the left pressing plate 311 and the right pressing plate 312 release the top protrusion 42 and return to their original positions. Then remove the left connecting rod 211 to carry out the work of inserting the electrode nail 4 in the next stage.

[0051] When pulling out the electrode nail 4, the pressing device 3 controls the left pressing plate 311 and the right pressing plate 312 to descend to both sides of the top protrusion 42. Then the first chuck 61 and the second chuck 62 control the left pressing plate 311 and the right pressing plate 312 to clamp the top protrusion 42. Then the pressing device 3 rises, so that all the electrode nails 4 are pulled out simultaneously.

[0052] Embodiment Four:

[0053] This embodiment is basically the same as Embodiment Three. The only difference is that the length between the left bracket 11 and the right bracket 12 is longer, and it is not easy to store during storage and placement. Due to the setting of the clamping device 6 in Embodiment Three, the pressure on the centering sleeve 22 is reduced, and it only plays a role of pre-positioning.

[0054] Therefore, in this embodiment, the connecting rod assembly 5 is used to replace the connecting rod 21. The two ends of the connecting rod assembly 5 are respectively hinged on the left bracket 11 and the right bracket 12. An expansion rod 14 is provided between the left bracket 11 and the right bracket 12.

[0055] As Figure 5 and Figure 6 jointly shown, the expansion rod 14 includes a shaft cylinder 141 and a telescopic shaft 142 slidably installed in the shaft cylinder 141. Size marks are provided on the shaft cylinder 141, and elastic pins are provided on the telescopic shaft 142. After determining the position between the centering sleeves 22, pull the left bracket 11 and the right bracket 12 to the appropriate positions, and the elastic pins play a positioning role. The left pressing plate 311 and the right pressing plate 312 are formed by splicing multiple sections. Then the missing parts in the middle of the left pressing plate 311 and the right pressing plate 312 are formed by splicing multiple sections and then fixed, realizing the expansion and contraction of the left bracket 11 and the right bracket 12, thereby facilitating storage and transportation.

[0056] The quick grounding electrode device of the high-density electrical resistivity instrument applicable to soft soil subgrade in the present invention solves the problem of time-consuming and laborious electrode insertion during the construction of the high-density electrical resistivity instrument in the prior art. By setting an adjustable-spacing centering sleeve, the electrode nail spacing can be fixed before arranging the electrode nails, and then when inserting the electrode nails, all the electrode nails are first inserted into the centering sleeve, and then the pressure plate is driven to press down through a manual driving device, so that the pressure plate presses on the top of the electrode nail, thereby pressing the electrode nails in the centering sleeve into the soil. Then, the left connecting rod or the right connecting rod is removed, and the device is taken off for laying the next section, thus greatly improving the work efficiency.

[0057] The present invention is not limited to the above specific embodiments. Those of ordinary skill in the art starting from the above concepts and making various transformations without creative labor fall within the protection scope of the present invention.

Claims

1. A rapid grounding electrode device for a high-density electrical method instrument applicable to soft soil subgrades, characterized in that: It includes a bracket, on which a predetermined distance device and a pressing device are provided; the bracket includes a left bracket and a right bracket, and a connecting rod is detachably installed between the left bracket and the right bracket. The connecting rod includes a left connecting rod and a right connecting rod; the predetermined distance device includes a plurality of centering sleeves, and each centering sleeve includes a left centering sleeve and a right centering sleeve that are buckled with each other. The left centering sleeve is installed on the left connecting rod with adjustable spacing, and the right centering sleeve is installed on the right connecting rod with adjustable spacing. The left centering sleeve and the right centering sleeve are buckled with each other to form a ring, and the electrode nail is inserted into the ring; the pressing device includes a pressing plate located above the electrode nail, and a manual driving device is connected to the pressing plate, and the manual driving device drives the pressing plate to press downward. Size marks are provided on the connecting rod. An automatic distance adjustment device is provided on the connecting rod. The automatic distance adjustment device includes a connecting rod assembly. A set of the connecting rod assemblies are respectively installed on the left connecting rod and the right connecting rod. The connecting rod assembly includes several first connecting rods that are hinged to each other. The central hinge point of the first connecting rod fixes the left centering sleeve or the right centering sleeve. One end of the connecting rod assembly is fixed to the left connecting rod or the right connecting rod, and the other end is hinged to a sliding point. The sliding point is slidably installed on the left connecting rod or the right connecting rod, and a positioning pin is provided between the sliding point and the corresponding left connecting rod or right connecting rod.

2. The rapid grounding electrode device for high-density electrical method instrument applicable to soft soil subgrade according to claim 1, characterized in that: The manual driving device includes a lead screw rotatably installed on the left bracket or the right bracket. A handwheel is provided above the lead screw. Both ends of the pressing plate are respectively fixed with sliders. The sliders are correspondingly slidably installed on the left bracket or the right bracket. A lead screw nut is provided on the slider, and the lead screw nut is slidably installed on the lead screw.

3. The rapid grounding electrode device of a high-density electrical prospecting instrument applicable to a soft soil subgrade according to claim 1, characterized in that: The manual driving device includes a lead screw rotatably installed on the top of the pressing plate. A handwheel is provided above the lead screw. A threaded hole that is threadedly engaged with the lead screw is provided on the left bracket or the right bracket.

4. The rapid grounding electrode device of a high-density electrical method instrument applicable to a soft soil subgrade according to claim 2, characterized in that: The pressing plate includes a left pressing plate and a right pressing plate that are oppositely arranged. Clamping grooves are oppositely arranged on the left pressing plate and the right pressing plate. The top protrusion of the electrode is arranged in the clamping groove. A clamping device is provided on the left pressing plate and the right pressing plate. The clamping device clamps or loosens the left pressing plate and the right pressing plate. The clamping device includes a first chuck and a second chuck that are slidably installed on the slider. The left pressing plate is fixed on the first chuck, and the right pressing plate is fixed on the second chuck. A clamping drive is provided between the first chuck and the second chuck.

5. The rapid grounding electrode device of a high-density electrical method instrument applicable to a soft soil subgrade according to claim 4, characterized in that: The clamping drive includes a sliding rod fixed on the first chuck. The axis of the sliding rod is consistent with the sliding direction of the first chuck. A through hole for the sliding rod to pass through is provided on the second chuck. A baffle is fixed at one end of the sliding rod that passes through the first chuck. A cam is provided between the baffle and the back surface of the second chuck. The cam is rotatably installed on the bracket. A return spring is provided between the first chuck and the second chuck.

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