A rock and soil sampling device for construction engineering investigation

Abstract

The present invention provides a rock and soil sampling device for construction engineering investigation, which relates to the field of rock and soil exploration sampling. The rock and soil sampling device for construction engineering investigation includes a transfer component, a frame component, a drilling component, a sampling component and an auxiliary drilling component. The frame component includes a base plate, a slide bar and a top plate. The slide bar is provided with a plurality of slide bars, which are respectively located between the base plate and the top plate. The upper and lower ends of the slide bar are respectively fixed to the top plate and the base plate, and the bottom end of the slide bar is installed on the transfer component. The rock and soil sampling device for construction engineering investigation can achieve the effect of smoother sampling and no disturbance of the sample due to pressure changes by setting the drilling component and the sampling component. The sampling component is set to ensure that the sample that has been damaged at the bottom end of the hollow drill rod will not be extracted during pre-sampling, but the outer drill pipe is used to continue to extend a certain length, so that the sampling result at the specified depth is more accurate.

Description

Technical Field

[0001] The invention relates to the field of rock and soil exploration sampling, in particular to a rock and soil sampling device for construction engineering exploration. Background Art

[0002] The basic contents of construction engineering survey are engineering survey, hydrogeological survey and engineering geological survey. The survey task is to find out the topography, soil lithology, geological structure, hydrological conditions and other natural geological conditions of the construction site of the project, make identification and comprehensive evaluation, and provide scientific and reliable basis for the site selection, engineering design and construction of the construction project. The quality of soil samples should be paid great attention to in rock and soil sampling. In the process of drilling and soil sampling, the structure of the soil is very easy to be disturbed. If the soil sample with disturbed structure is used for testing, wrong conclusions will inevitably be obtained, which will cause engineering accidents or waste construction funds. It is very important to put forward standardized requirements for the quality of soil samples. The "Geotechnical Engineering Investigation Code" provides standards for the classification of soil sample quality grades, and proposes soil sample quality grades according to the requirements of different tests for the degree of disturbance of soil samples. Different sampling tools are suitable for different soil types. In order to obtain qualified soil samples when taking soil, appropriate sampling tools and sampling methods should be selected according to the requirements for soil sample quality grades and soil types. Geotechnical sampling and analysis is an indispensable step before various engineering constructions. It mainly uses certain geotechnical sampling devices to extract the original soil of the lower test soil as a sample to understand its base properties. During the sampling process, geotechnical layers at different depths have different properties, so it is necessary to sample geotechnical layers at different depths.

[0003] Chinese Patent Publication No.: CN210863227U discloses a geotechnical survey sampling device for architectural design, including a cylinder, a top plate is provided on the cylinder, a rotating shaft is provided on the top plate, a drill bit is provided on the rotating shaft, a spiral transmission paddle fixedly connected to the rotating shaft is provided on the upper side of the drill bit, the outer diameter of the spiral transmission paddle matches the inner diameter of the cylinder, a lower cylinder matching the drill bit is fixedly connected to the lower end of the cylinder, a handle is fixedly connected to the upper end of the rotating shaft, an L-shaped pipe is provided on the front side of the cylinder, the L-shaped pipe is communicated with the cylinder, the L-shaped pipe mouth faces downward, a transparent material receiving bottle is threadedly connected to the lower end of the L-shaped pipe, L-shaped brackets are fixedly connected to the left and right sides of the cylinder, and the lower ends of the two L-shaped brackets are fixedly connected to a rectangular bottom plate.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the disturbance degree of soil samples is one of the important factors affecting the quality of soil samples. The related sampling device transports the soil to a transparent receiving bottle through a spiral conveyor paddle, which can easily lead to excessive disturbance of the soil samples, affecting the data accuracy of subsequent test results. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a rock and soil sampling device for construction engineering investigation, which solves the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rock and soil sampling device for construction engineering survey, including a transfer component, a frame component, a drilling component, a sampling component and an auxiliary drilling component.

[0007] The frame assembly includes a base plate, a slide bar and a top plate. There are multiple slide bars, which are respectively located between the base plate and the top plate. The upper and lower ends of the slide bars are respectively fixed to the top plate and the base plate, and the bottom end of the slide bar is installed on the transfer assembly.

[0008] The drilling assembly includes an outer cover, a hollow drill rod, an extended drill rod and a power assembly. The bottom end of the hollow drill rod is a conical structure. A spiral blade A is provided on the outside of the hollow drill rod. The spiral blade A extends downward to its conical structure. The outer cover is fixedly installed below the base plate. The outer ring of the outer cover is provided with a plurality of longitudinal soil discharge grooves. The extended drill rod is fixed to the upper end of the hollow drill rod and is coaxially arranged therewith. The upper end of the extended drill rod passes through the outer cover and the base plate and is located between a plurality of sliding rods. The power assembly is fixedly installed on the base plate. The upper end of the extended drill rod is connected to the power assembly. The power assembly is used to extend the rotation of the drill rod.

[0009] The sampling assembly is arranged between the plurality of slide bars and connected with the plurality of slide bars in an up-and-down sliding manner. The lower end of the sampling assembly can be inserted into the hollow drill rod. The auxiliary drilling assembly is installed on the top plate, and the lower end thereof can extend to the bottom end of the hollow drill rod.

[0010] Preferably, the sampling assembly includes an outer drill tube, a matching head, a sampling tube, a fixed sleeve and a power assembly. The power assembly is installed between a plurality of slide bars and is slidably connected to the slide bars up and down. The upper end of the outer drill tube is installed in the power assembly. The power assembly is used to drive the outer drill tube to rotate. The matching head is fixed to the bottom end of the outer drill tube. The matching head is a conical annular structure. When the matching head is at the bottom end of the hollow drill rod, it forms a conical structure with the bottom end of the hollow drill rod. A spiral blade B is provided on the outside of the outer drill tube. The height of the spiral blade B does not exceed the outer wall of the matching head. The sampling tube is in the outer drill tube and is concentrically arranged therewith. The inner diameter of the sampling tube is the same as the inner diameter of the matching head. The fixed sleeve is fixed on the power assembly and is sleeved on the outside of the sampling tube. A vibrator is installed on the outside of the fixed sleeve for vibrating the sampling tube.

[0011] Preferably, a connecting ring is fixedly installed inside the fixing sleeve, the connecting ring is in contact with the outer wall of the sampling tube, and the vibration force of the vibrator acts on the connecting ring.

[0012] Preferably, the auxiliary drilling assembly includes a lifter, a long rod and a center drill bit, the lifter is fixed on the top plate, the long rod is in the middle of a plurality of sliding rods, the center drill bit is mounted on the bottom end of the long rod and is rotatably connected thereto, when the long rod extends to the bottommost end, the center drill bit is in the mating head, and forms a pointed cone structure with the mating head and the bottom end of the hollow drill rod, a cross blade is fixedly mounted on the bottom surface of the center drill bit, the center drill bit is slidably connected to the mating head up and down, and the rotational force of the mating head can act on the center drill bit.

[0013] Preferably, the outer ring of the center drill bit is provided with a plurality of grooves, and the inner wall of the matching head is provided with a plurality of protrusions, and the protrusions are matched with the grooves.

[0014] Preferably, the power assembly includes a motor, a housing, a large gear and a small gear, the large gear and the small gear are both in the housing and mesh with each other, both are rotatably connected to the housing, the motor is fixed to the housing, and its output shaft is connected to the main shaft of the small gear;

[0015] The power assembly on the drilling assembly includes a large gear, the inner ring of which is fixedly sleeved on the hollow drill rod, and the housing of which is fixed on the base plate;

[0016] The power assembly on the sampling assembly includes a large gear, whose inner ring is fixedly sleeved on the outer drill pipe, and a plurality of sliding sleeves are fixed on the outside of the housing, which are sleeved on the sliding rod and slidably connected with the sliding rod.

[0017] Preferably, the base is provided with a plurality of operating holes penetrating from top to bottom, and a plurality of fixed cones are fixedly mounted on the bottom surface of the base.

[0018] Preferably, the transfer assembly includes a transfer vehicle and a sliding frame, the transfer vehicle is fixedly mounted with a slide rail, the lower end of the sliding frame is mounted on the slide rail and is slidably connected thereto, the sliding frame is mounted with a swing frame hinged thereto, and one end of the swing frame away from the sliding frame is movably connected to a slide rod on one side.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The geotechnical sampling device for construction engineering investigation is provided with a drilling assembly and a sampling assembly. When the power assembly is running, the hollow drill rod rotates, the matching head and the center drill bit rotate synchronously, and the hollow drill rod can drill downward. When drilling to a certain depth, the soil discharge will be transferred to the ground from the soil discharge trough. After reaching the specified depth, the hollow drill rod stops rotating, and the lifter lifts the long rod and the center drill bit from the hollow drill rod and moves them to the outer drill pipe. The outer drill pipe continues to rotate and continues to drill downward. During drilling, the sampling tube does not rotate. When the outer drill pipe drills, the soil at the center will gradually enter the sampling tube. The vibration machine ensures that the sampling tube is inserted into the soil more smoothly, and the soil in the sampling tube will not be greatly disturbed due to pressure changes, thereby reducing the detection error. When sampling to a certain depth, the outer drill pipe stops rotating. At this time, the vibration machine breaks the bottom of the sampled rock and soil and the rock and soil in the sampling tube, thereby the sampling tube can be smoothly raised without damaging the internal sample, so that the sampling can be smoother and the sample will not be disturbed due to pressure changes.

[0021] 2. The geotechnical sampling device for construction engineering investigation is provided with a sampling assembly. After reaching the specified depth, the rotation speed of the outer drill pipe is controlled to be greater than that of the hollow drill rod and in conjunction with the auxiliary drilling assembly, the outer drill pipe and the center drill bit are extended from the hollow drill rod to a certain length. After extending for a certain length, the center drill bit is taken out and then the outer drill pipe is controlled to drill in and take samples. This ensures that the sample that has been damaged at the bottom end of the hollow drill rod will not be extracted during pre-sampling. Instead, the outer drill pipe is used to continue to extend a certain length, so that the sampling structure at the specified depth is more accurate.

[0022] 3. The rock and soil sampling device for construction engineering investigation is provided with an outer drill tube, a sampling tube and a matching head. Since the matching head is a ring structure and its bottom end is a pointed inclined structure, the resistance is smaller when it enters the rock and soil. Since the inner diameter of the sampling tube is the same as the inner diameter of the matching head, the center sample rock and soil can enter the sampling tube more easily during sampling. The sampled rock and soil are not squeezed into the sampling tube due to pressure, so the sample test data is more accurate.

[0023] 4. The geotechnical sampling device for construction engineering investigation sets up a base plate. After the hollow drill rod drills to a certain depth, the fixed cone at the bottom of the base plate can be inserted into the ground. At this time, there is no need to manually hold the base plate, and the outer drill pipe will not cause the base plate to twist due to the reaction force when entering.

[0024] 5. The geotechnical sampling device for construction engineering investigation is provided with a transfer component, and the transfer component can transport the frame component when the drilling is completed, or the equipment can be transported before sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a partial structural schematic diagram of the present invention;

[0027] Figure 3 It is a structural schematic diagram of the drilling assembly of the present invention;

[0028] Figure 4 For the present invention Figure 3 A magnified view of the structure at center A;

[0029] Figure 5 It is a structural schematic diagram of the rack assembly of the present invention;

[0030] Figure 6 The figure is a disassembled diagram of the frame assembly, the drilling assembly, the sampling assembly and the auxiliary drilling assembly of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified view of the structure at center A;

[0032] Figure 8 For the present invention Figure 6 A magnified view of the structure at B in the middle;

[0033] Fig. 9 This is a structural breakdown diagram of the sampling assembly of the present invention;

[0034] Fig.10 For the present invention Fig. 9 A magnified view of the structure at center.

[0035] In the figure: 1. Transfer assembly; 101. Transfer vehicle; 102. Sliding frame; 103. Slide rail; 104. Swing frame; 2. Frame assembly; 201. Base plate; 202. Slide bar; 203. Top plate; 204. Operation hole; 205. Fixed cone; 3. Drilling assembly; 301. Outer cover; 302. Hollow drill rod; 303. Extended drill rod; 304. Spiral blade A; 305. Soil discharge trough; 4. Sampling assembly; 401. outer drill tube; 402. matching head; 403. sampling tube; 404. fixing sleeve; 405. spiral blade B; 406. vibrator; 407. connecting ring; 5. auxiliary drilling assembly; 501. lifter; 502. long rod; 503. center drill bit; 504. cross blade; 505. groove; 506. protrusion; 6. motor; 7. housing; 8. large gear; 9. small gear; 10. sliding sleeve. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0037] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0038] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In addition, in this application, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0040] like Figure 1-10 As shown, a geotechnical sampling device for construction engineering investigation includes a transfer component 1, a frame component 2, a drilling component 3, a sampling component 4 and an auxiliary drilling component 5.

[0041] The frame assembly 2 includes a base plate 201, a slide rod 202 and a top plate 203. There are multiple slide rods 202, which are respectively located between the base plate 201 and the top plate 203. The upper and lower ends of the slide rod 202 are respectively fixed to the top plate 203 and the base plate 201, and the bottom end of the slide rod 202 is installed on the transfer assembly 1.

[0042] The drilling assembly 3 includes an outer cover 301, a hollow drill rod 302, an extended drill rod 303 and a power assembly. The bottom end of the hollow drill rod 302 is a conical structure. The outside of the hollow drill rod 302 is provided with a spiral blade A304, and the spiral blade A304 extends downward to its conical structure. The outer cover 301 is fixedly installed below the base plate 201. The outer ring of the outer cover 301 is provided with a plurality of longitudinal soil discharge grooves 305. The extended drill rod 303 is fixed to the upper end of the hollow drill rod 302 and is coaxially arranged therewith. The upper end of the extended drill rod 303 passes through the outer cover 301 and the base plate 201 and is located between the plurality of sliding rods 202. The power assembly is fixedly installed on the base plate 201. The upper end of the extended drill rod 303 is connected to the power assembly. The power assembly is used to rotate the extended drill rod 303.

[0043] The sampling assembly 4 is arranged between multiple slide bars 202 and is connected to the multiple slide bars 202 for sliding up and down movement. The lower end of the sampling assembly 4 can be inserted into the hollow drill rod 302. The auxiliary drilling assembly 5 is installed on the top plate 203, and its lower end can extend to the bottom end of the hollow drill rod 302.

[0044] The outer diameter of the outer cover 301 does not exceed the outer diameter of the spiral blade A304, so when the hollow drill rod 302 drills downward, the outer cover 301 will also enter the borehole, and the rock and soil lifted by the hollow drill rod can be removed from the discharge trough 305. The extended drill rod 303 has different length specifications and can be set in multiple sections. The number of sections can be changed according to the actual sampling depth. The spiral blades A304 outside the hollow drill rod 302 are set in multiple groups, which can have a better destructive power on the rock and soil.

[0045] The sampling assembly 4 includes an outer drill pipe 401, a matching head 402, a sampling pipe 403, a fixing sleeve 404 and a power assembly. The power assembly is installed between the plurality of slide bars 202 and connected with the slide bars 202 for sliding movement up and down. The upper end of the outer drill pipe 401 is installed in the power assembly. The power assembly is used to drive the outer drill pipe 401 to rotate. The matching head 402 is fixed at the bottom end of the outer drill pipe 401. The matching head 402 is a conical ring structure. When the matching head 402 is at the bottom end of the hollow drill rod 302, it is connected with the hollow drill rod 302. The bottom end of the core drill rod 302 forms a conical structure, and a spiral blade B405 is provided on the outside of the outer drill tube 401. The height of the spiral blade B405 does not exceed the outer wall of the matching head 402. The sampling tube 403 is located in the outer drill tube 401 and is concentrically arranged therewith. The inner diameter of the sampling tube 403 is the same as the inner diameter of the matching head 402. The fixed sleeve 404 is fixed on the power assembly and is sleeved on the outside of the sampling tube 403. A vibrator 406 is installed on the outside of the fixed sleeve 404 for vibrating the sampling tube 403.

[0046] Since the outer drill pipe 401 does not need to discharge soil but only needs to drill into the soil, the outer diameter of the spiral blade B405 protrudes less from the outer drill pipe 401. When the outer drill pipe 401 rotates, no additional manual assistance is required to ensure that the outer drill pipe 401 moves into the rock and soil. If the feed speed is slow, the power component can be pressed manually. The wall thickness of the outer drill pipe 401 is smaller than the thickness of the fitting head 402.

[0047] The vibrator 406 is composed of a motor and an adjustable eccentric block, and uses the centrifugal force generated by the high-speed rotation of the shaft and the eccentric block to obtain the exciting force.

[0048] A connecting ring 407 is fixedly installed inside the fixing sleeve 404 . The connecting ring 407 is in contact with the outer wall of the sampling tube 403 . The vibration force of the vibrator 406 acts on the connecting ring 407 .

[0049] The connecting ring 407 is used to limit the sampling tube 403. The connecting ring 407 can adopt a semicircular structure and be fastened to the sampling tube 403 with bolts. It can also be made of a material that can increase the friction between the metal parts. The vibration force of the vibrator 406 can be transmitted to the sampling tube 403 through the connecting ring 407.

[0050] The auxiliary drilling assembly 5 includes a lifter 501, a long rod 502 and a center drill bit 503. The lifter 501 is fixed on the top plate 203, the long rod 502 is located in the middle of the plurality of slide rods 202, and the center drill bit 503 is installed on the bottom end of the long rod 502 and is rotatably connected thereto. When the long rod 502 extends to the bottom end, the center drill bit 503 is located in the mating head 402 and forms a pointed cone structure together with the mating head 402 and the bottom end of the hollow drill rod 302. A cross blade 504 is fixedly installed on the bottom surface of the center drill bit 503. The center drill bit 503 is slidably connected to the mating head 402 up and down, and the rotational force of the mating head 402 can act on the center drill bit 503.

[0051] The lifter 501 is composed of a motor and a clamping wheel, and the clamping wheel is suitable for transmitting the long rod 502, or a spiral lifter is used. The long rod 502 is transmitted in a spiral manner to ensure that the long rod 502 is drilled synchronously with the hollow drill rod 302. A bearing is installed between the long rod 502 and the center drill bit 503. The cross blade 504 is made of alloy, and a diamond drill bit can also be used, which mainly plays the role of destroying rock and soil.

[0052] The outer ring of the center drill bit 503 is provided with a plurality of grooves 505 , and the inner wall of the matching head 402 is provided with a plurality of protrusions 506 , and the protrusions 506 are matched with the grooves 505 .

[0053] The cooperation between the groove 505 and the protrusion 506 does not affect the up and down sliding, but can transmit the power of the outer drill tube 401 to the center drill bit 503.

[0054] The power assembly includes a motor 6, a housing 7, a large gear 8 and a small gear 9. The large gear 8 and the small gear 9 are both located in the housing 7 and mesh with each other. Both are rotationally connected to the housing 7. The motor 6 is fixed to the housing 7, and its output shaft is connected to the main shaft of the small gear 9.

[0055] The power assembly on the drilling assembly 3 includes a large gear 8, whose inner ring is fixedly sleeved on the hollow drill rod 302, and whose housing 7 is fixed on the base plate 201;

[0056] The power assembly on the sampling assembly 4 includes a large gear 8, whose inner ring is fixedly sleeved on the outer drill pipe 401, and a plurality of sliding sleeves 10 are fixed on the outside of the housing 7, and the sliding sleeves 10 are sleeved on the sliding rod 202 and slidably connected with the sliding rod 202.

[0057] The base plate 201 is provided with a plurality of operation holes 204 penetrating vertically, and a plurality of fixing cones 205 are fixedly mounted on the bottom surface of the base plate 201 .

[0058] The operating hole 204 is convenient for the sampling personnel to hold and drill. After drilling to a certain depth, the fixing cone 205 can be inserted into the soil to prevent the reaction force from causing the machine to reverse, and can also reduce the physical effort of the operator.

[0059] The transfer assembly 1 includes a transfer vehicle 101 and a sliding frame 102. A slide rail 103 is fixedly installed on the transfer vehicle 101. The lower end of the sliding frame 102 is installed on the slide rail 103 and is slidably connected thereto. A swing frame 104 is hingedly connected thereto and installed on the sliding frame 102. One end of the swing frame 104 away from the sliding frame 102 is movably connected to a slide rod 202 on one side.

[0060] The swing frame 104 is connected to the sliding frame 102 in a quick-release manner. When the device is transported to the drilling position, the swing frame 104 can be removed from the sliding frame 102 without affecting the operation.

[0061] When in use, the transfer vehicle 101 can transfer the rack assembly 2 to the position where sampling is required, and after reaching the designated position, the rack assembly 2 is removed, and then the rack assembly 2 is erected;

[0062] The power assembly is controlled to operate to rotate the hollow drill rod 302. When the hollow drill rod 302 rotates, the matching head 402 at its bottom and the center drill bit 503 rotate synchronously, and the hollow drill rod 302 can drill downward. After the hollow drill rod 302 drills to a certain depth, the fixed cone 205 at the bottom of the base plate 201 can be inserted into the ground. At this time, there is no need to manually hold the base plate 201, and the outer drill pipe 401 will not cause the base plate 201 to twist due to the reaction force when entering. When drilling to a certain depth, the discharge soil will be transferred to the ground from the discharge soil trough 305. After reaching the specified depth, the hollow drill rod 302 stops rotating, and the lifter 501 lifts the long rod 502 and the center drill bit 503 from the hollow drill rod 302 and moves them to the outer drill pipe 401. The outer drill pipe 401 continues to rotate and will continue to drill downward. Continue drilling. During drilling, the sampling tube 403 will not rotate. When the outer drill tube 401 is drilled, the soil in the center will gradually enter the sampling tube 403. The vibration will ensure that the sampling tube 403 is inserted into the soil more smoothly. Since the matching head 402 is a ring structure and its bottom end is a pointed inclined surface structure, the resistance is smaller when it enters the rock and soil. Since the inner diameter of the sampling tube 403 is the same as the inner diameter of the matching head 402, the central sample rock and soil can enter the sampling tube 403 more easily during sampling. The sampled rock and soil are not squeezed into the sampling tube 403 due to pressure. When sampling reaches a certain depth, the outer drill tube 401 stops rotating. At this time, the vibration will break the bottom of the sampled rock and soil and the rock and soil in the sampling tube 403, so that the sampling tube 403 can be smoothly taken out without damaging the internal sample.

[0063] The second drilling form: after reaching the specified depth, the rotation speed of the outer drill pipe 401 is controlled to be greater than that of the hollow drill rod 302 and in conjunction with the auxiliary drilling assembly 5, the outer drill pipe 401 and the center drill bit 503 are extended from the hollow drill rod 302 to a certain length. After extending for a certain length, the center drill bit 503 is taken out, and then the outer drill pipe 401 is controlled to drill in and take samples. This ensures that the sample that has been damaged at the bottom end of the hollow drill rod 302 will not be extracted during the pre-sampling, but the outer drill pipe 401 will continue to extend to a certain length.

[0064] When the drilling is completed, the transfer assembly 1 can transport the frame assembly 2.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0066] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A soil sampling device for construction engineering investigation, comprising a transfer assembly (1), characterized in that: It also includes a frame assembly (2), a drilling assembly (3), a sampling assembly (4) and an auxiliary drilling assembly (5); The frame assembly (2) comprises a base plate (201), a slide bar (202) and a top plate (203); a plurality of slide bars (202) are provided, each of which is located between the base plate (201) and the top plate (203); the upper and lower ends of the slide bars (202) are respectively fixed to the top plate (203) and the base plate (201); and the bottom end of the slide bar (202) is mounted on the transfer assembly (1); The drilling assembly (3) comprises an outer cover (301), a hollow drill rod (302), an extended drill rod (303) and a power assembly. The bottom end of the hollow drill rod (302) is a conical structure. A spiral blade A (304) is provided on the outside of the hollow drill rod (302). The spiral blade A (304) extends downward to its conical structure. The outer cover (301) is fixedly installed below the base plate (201). The outer ring of the outer cover (301) is provided with a plurality of longitudinal soil discharge grooves (305). The extended drill rod (303) is fixed to the upper end of the hollow drill rod (302) and is coaxially arranged therewith. The upper end of the extended drill rod (303) passes through the outer cover (301) and the base plate (201) and is located between the plurality of sliding rods (202). The power assembly is fixedly installed on the base plate (201). The upper end of the extended drill rod (303) is connected to the power assembly. The power assembly is used to rotate the extended drill rod (303). The sampling assembly (4) is disposed between the plurality of slide bars (202) and is slidably connected to the plurality of slide bars (202) up and down. The lower end of the sampling assembly (4) can be inserted into the hollow drill rod (302). The auxiliary drilling assembly (5) is mounted on the top plate (203), and the lower end of the auxiliary drilling assembly (5) can extend to the bottom end of the hollow drill rod (302). The sampling assembly (4) comprises an outer drill pipe (401), a matching head (402), a sampling pipe (403), a fixing sleeve (404) and a power assembly. The power assembly is installed between a plurality of slide bars (202) and is connected to the slide bars (202) in an upward and downward sliding manner. The upper end of the outer drill pipe (401) is installed in the power assembly. The power assembly is used to drive the outer drill pipe (401) to rotate. The matching head (402) is fixed to the bottom end of the outer drill pipe (401). The matching head (402) is a conical ring structure. When the matching head (402) is at the bottom end of the hollow drill rod (302), it is connected to the outer drill pipe (401). The bottom end of the hollow drill rod (302) forms a conical structure. A spiral blade B (405) is provided on the outside of the outer drill pipe (401). The height of the spiral blade B (405) does not exceed the outer wall of the matching head (402). The sampling tube (403) is located inside the outer drill pipe (401) and is arranged concentrically therewith. The inner diameter of the sampling tube (403) is the same as the inner diameter of the matching head (402). The fixing sleeve (404) is fixed on the power component and is sleeved on the outside of the sampling tube (403). A vibrator (406) is installed outside the fixing sleeve (404) for vibrating the sampling tube (403). The auxiliary drilling assembly (5) comprises a lifter (501), a long rod (502) and a center drill bit (503); the lifter (501) is fixed on the top plate (203); the long rod (502) is located in the middle of the plurality of sliding rods (202); the center drill bit (503) is mounted on the bottom end of the long rod (502) and is rotatably connected thereto; when the long rod (502) is extended to the bottom end, the center drill bit (503) is located in the matching head (402) and forms a pointed cone structure with the matching head (402) and the bottom end of the hollow drill rod (302); a cross blade (504) is fixedly mounted on the bottom surface of the center drill bit (503); the center drill bit (503) is slidably connected to the matching head (402) up and down, and the rotational force of the matching head (402) can act on the center drill bit (503).

2. A rock and soil sampling device for construction engineering investigation according to claim 1, characterized in that: A connecting ring (407) is fixedly installed inside the fixing sleeve (404), the connecting ring (407) is in contact with the outer wall of the sampling tube (403), and the vibration force of the vibrator (406) acts on the connecting ring (407).

3. A rock and soil sampling device for construction engineering investigation according to claim 2, characterized in that: The outer ring of the center drill bit (503) is provided with a plurality of grooves (505), and the inner wall of the matching head (402) is provided with a plurality of protrusions (506), and the protrusions (506) are arranged in coordination with the grooves (505).

4. A rock and soil sampling device for construction engineering investigation according to claim 3, characterized in that: The power assembly comprises a motor (6), a housing (7), a large gear (8) and a small gear (9); the large gear (8) and the small gear (9) are both located in the housing (7) and mesh with each other, and are both rotationally connected to the housing (7); the motor (6) is fixed to the housing (7), and its output shaft is connected to the main shaft of the small gear (9); The power assembly on the drilling assembly (3) includes a large gear (8), whose inner ring is fixedly sleeved on the hollow drill rod (302), and whose housing (7) is fixed on the base plate (201); The power assembly on the sampling assembly (4) includes a large gear (8), the inner ring of which is fixedly sleeved on the outer drill pipe (401), and a plurality of sliding sleeves (10) are fixed on the outside of the housing (7), and the sliding sleeves (10) are sleeved on the sliding rod (202) and are slidably connected to the sliding rod (202).

5. A rock and soil sampling device for construction engineering investigation according to claim 4, characterized in that: The base plate (201) is provided with a plurality of operating holes (204) penetrating vertically, and a plurality of fixed cones (205) are fixedly mounted on the bottom surface of the base plate (201).

6. A rock and soil sampling device for construction engineering investigation according to any one of claims 1 to 5, characterized in that: The transfer assembly (1) comprises a transfer vehicle (101) and a sliding frame (102), wherein a slide rail (103) is fixedly mounted on the transfer vehicle (101), the lower end of the sliding frame (102) is mounted on the slide rail (103) and is slidably connected thereto, and a swing frame (104) is mounted on the sliding frame (102) and is hinged thereto, wherein one end of the swing frame (104) away from the sliding frame (102) is movably connected to a slide rod (202) on one side.

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