A geotechnical engineering investigation reaming device and reaming method

Abstract

The application provides a geotechnical engineering investigation hole expanding device and hole expanding method, and relates to the technical field of engineering investigation machinery. The hole expanding device comprises a support seat, a main frame body, a drill rod assembly, a soil taking assembly and a drill bit with a soil drilling assembly and a releasable soil storage assembly. Through the design of the support seat, the main frame body, the drill rod assembly, the soil taking assembly and the drill bit with the soil drilling assembly and the releasable soil storage assembly, the broken rock soil can be collected by the releasable soil storage assembly during the hole expanding process, the soil taking assembly is extended when the drill bit leaves the new hole upward, the releasable soil storage assembly is opened by the cooperators on the soil taking assembly, and the broken rock soil falls on the soil taking assembly, so that the broken rock soil is conveniently taken out, and thus the efficient and rapid hole expanding operation can be realized.

Description

Technical Field

[0001] This invention relates to the field of exploration engineering machinery technology, specifically to a hole-enlarging device and method for geotechnical engineering exploration. Background Technology

[0002] To ensure the quality of surface drilling during geological exploration, a pilot hole is often drilled first. The axis of the pilot hole is easy to control. Then, a new coaxial borehole (the enlarged hole) is opened using the pilot hole as a guide. Generally, a small-sized auger is used to open the pilot hole, with a diameter of 20-40cm. The opening resistance is small, and it is easy to control the opening direction. Then, an reaming drill bit with a diameter of 80-100cm is used to enlarge the hole. The guiding part at the bottom of the reaming drill bit can be kept aligned with the original borehole (the pilot hole), so that the new borehole and the original borehole are coaxial in height, thereby ensuring the quality of drilling.

[0003] Currently used reaming drill bits only serve the purpose of reaming holes. In actual use, they need to be used in conjunction with slag removal equipment. The debris generated during reaming may enter the original hole, affecting the fit between the guide part at the bottom of the reaming drill bit and the original hole, making the reaming process complex, time-consuming, and resulting in poor hole quality (positional accuracy). Therefore, this invention provides a reaming device and method for geotechnical engineering exploration. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a hole enlargement device and method for geotechnical engineering exploration. It solves the problem that currently used hole enlargement drill bits only have the purpose of enlarging holes. In actual use, they need to be used in conjunction with slag removal equipment. The debris generated during hole enlargement may enter the original hole, affecting the fit between the guide part at the bottom of the hole enlargement drill bit and the original hole, making the hole enlargement process complex, time-consuming, and resulting in poor hole quality (positional accuracy).

[0005] To achieve the above objectives, the present invention provides a geotechnical engineering exploration borehole enlargement device, comprising a support base and a main frame. The main frame is rotatably mounted to the support base near its bottom end, and a hydraulic telescopic arm for adjusting the angle of the main frame is installed between the main frame and the support base. It also includes a drill rod assembly and a soil sampling assembly. The drill rod assembly is slidably connected to the main frame, and its sliding on the main frame is controlled by multi-stage hydraulic telescopic components on the main frame. A drill bit is movably mounted at the bottom end of the drill rod assembly. The soil sampling assembly is installed near the bottom end of the main frame and has a retractable soil receiving hopper.

[0006] The drill bit includes a soil-drilling assembly and a releasable soil-collecting assembly. The soil-collecting assembly is located below the soil-drilling assembly. The soil-collecting assembly includes a support cylinder, a suspension rod, and a double-cone head assembly. The support cylinder is rotatably connected to the central drill rod of the soil-drilling assembly. The suspension rod is connected to the central drill rod of the soil-drilling assembly via an elastic connector. The double-cone head assembly is rotatably connected to the suspension rod, and the top end of the double-cone head assembly mates with the bottom port of the support cylinder. A fitting device that mates with the suspension rod is provided inside the soil-collecting hopper.

[0007] The bearing cylinder is used to collect crushed rock and soil during the borehole enlargement process. When the drill bit is pulled out of the borehole, the soil receiving hopper extends to below the drill bit. The suspension rod is restricted from moving upward by the coupling device. The suspension rod is under tension, causing the double cone head assembly to move relative to the bearing cylinder. The bottom end of the bearing cylinder opens, and the crushed rock and soil in the bearing cylinder falls into the soil receiving hopper.

[0008] A preferred technical solution of the present invention is as follows: the support base includes a fixed body / movable body and a cross frame. The cross frame is fixedly installed on the top of the fixed body / movable body, and the first end of the cross frame extends out of the side of the fixed body / movable body. A first connector is fixedly connected to the first end of the cross frame, and the first connector is rotatably installed with a second connector on the side of the main frame. Both sides of the second end of the cross frame are fixedly connected with first connectors, and auxiliary supports are rotatably installed on the first connectors. An adjustable support leg is fixedly installed at the end of the auxiliary support away from the cross frame.

[0009] A preferred technical solution of the present invention: The main frame includes a vertical frame, a top plate is fixedly installed at the top of the vertical frame, the multi-stage hydraulic telescopic component is fixedly installed on the top of the top plate, sliding side plates are fixedly connected to the left and right sides of the front side of the vertical frame, two parallel first sliding blocks are fixedly connected to the front side of the vertical frame between the two sliding side plates, a sliding opening is provided on the front side of the vertical frame between the two first sliding blocks, the telescopic part of the multi-stage hydraulic telescopic component is located inside the sliding opening, a second connecting seat is fixedly connected to the back of the vertical frame near the bottom of the vertical frame; the second connecting seat is rotatably installed with the support seat; a rectangular opening for the soil extraction component to pass through is provided on the side of the vertical frame below the second connecting seat.

[0010] A preferred technical solution of the present invention: The drill rod assembly includes a hydraulic motor assembly and a longitudinal plate. The drill rod is fixedly installed at the bottom output end of the hydraulic motor assembly, and a third connecting seat is fixedly installed at the bottom end of the drill rod. The first side of the longitudinal plate is fixedly connected to the housing of the hydraulic motor assembly via a rib frame. A second sliding seat is fixedly connected to the second side of the longitudinal plate. The second sliding seat is slidably installed with a first sliding block. The longitudinal plate is located inside the two sliding side plates. A sliding frame is fixedly connected to the second side of the longitudinal plate. The sliding frame is located inside the sliding opening. The bottom telescopic end of the multi-stage hydraulic telescopic component is fixedly installed with the sliding frame.

[0011] A preferred technical solution of the present invention: The soil drilling assembly includes a first rod body and a disc body. A connecting female head is provided at the top of the first rod body, and a second connecting head is threadedly installed at the top of the first rod body. The second connecting head is movably installed with a third connecting seat at the bottom end of the drill rod body via a pin. The disc body is fixedly connected to the side of the first rod body, and a fourth connecting seat is fixedly connected to the bottom of the disc body and located outside the first rod body. A reaming head is rotatably installed at the bottom of the fourth connecting seat. Multiple fourth connecting seats and reaming heads are arranged in a ring. Multiple sets of reinforcing ribs are fixedly connected between the disc body and the first rod body.

[0012] A preferred technical solution of the present invention is as follows: the top end of the bearing cylinder is rotatably connected to the part of the first rod located below the disc body via a central frame; a plurality of annularly distributed limiting ribs are fixedly connected to the outer side of the bearing cylinder; a spring is fixedly connected to the top end of the suspension rod; a mounting head is fixedly connected to the top end of the spring; a mounting hole is opened at the bottom end of the first rod body; the mounting head is located inside the mounting hole; and the mounting head and the mounting hole are connected by a transverse insert rod, which is located above the disc body.

[0013] A preferred technical solution of the present invention is as follows: an extended sliding member is fixedly connected to the outer side of the double cone head assembly, and a sliding groove is provided on the inner side of the bearing cylinder, wherein the extended sliding member slides in conjunction with the sliding groove.

[0014] The preferred technical solution of the present invention is as follows: the soil sampling component includes a connecting block and a horizontal hydraulic telescopic component; the top of the connecting block is fixedly connected to the main frame, and a vertical plate is fixedly installed at the bottom of the connecting block; the horizontal hydraulic telescopic component is fixedly connected to the vertical plate, and the bottom of the soil receiving hopper is fixedly connected to the telescopic end of the horizontal hydraulic telescopic component.

[0015] The preferred technical solution of the present invention is as follows: the fitting device is a U-shaped bracket, the U-shaped bracket is fixedly connected to the inner bottom of the soil receiving hopper, and a guide bevel is provided on the inner side of the front end of the U-shaped bracket; an annular opening is provided on the side of the suspension rod and below the double cone head assembly; a reinforcing plate is fixedly connected between the U-shaped bracket and the soil receiving hopper.

[0016] This invention also provides a method for borehole enlargement in geotechnical engineering investigation, which uses the aforementioned borehole enlargement device to enlarge the borehole, specifically including the following steps:

[0017] S1. Control the drill rod assembly to be in the drilling state. At this time, the hydraulic telescopic boom adjusts the main frame to a vertical state, and the soil receiving bucket of the soil taking assembly is in the retracted state.

[0018] S2. After preparation, begin hole enlargement. The multi-stage hydraulic telescopic component pushes the drill rod assembly downward, and simultaneously drives the drill bit to rotate. The releasable soil storage component of the drill bit guides the drill bit to the original hole position. The rotating soil storage component enlarges the hole. The broken soil generated during the hole enlargement process falls into the bearing cylinder of the releasable soil storage component. When the broken soil in the bearing cylinder is full, the drill rod assembly stops working, and the multi-stage hydraulic telescopic component pushes the drill rod assembly upward.

[0019] S3. When the drill bit is pulled out of the borehole, the soil receiving component controls the soil receiving bucket to extend. The soil receiving bucket blocks the new hole below. The mate and the suspension rod work together to restrict the suspension rod from moving upward. The suspension rod is under tension, causing the double cone head assembly and the bearing cylinder to move relative to each other. The bottom of the bearing cylinder opens, releasing the crushed rock and soil in the bearing cylinder into the soil receiving bucket. The soil receiving bucket then guides the crushed soil to fall onto the ground / bucket.

[0020] The present invention has the following beneficial effects:

[0021] 1. This invention, through the design of a support base, main frame, drill rod assembly, soil sampling assembly, and drill bit with a soil drilling assembly and a releasable soil storage assembly, enables the collection of broken rock and soil by the releasable soil storage assembly during the hole reaming process. When the drill bit moves upward away from the new hole, the soil sampling assembly extends, and the fitting on the soil sampling assembly opens the releasable soil storage assembly, allowing the broken rock and soil to fall onto the soil sampling assembly, thus facilitating the removal of the broken rock and soil. This enables efficient and rapid hole reaming operations.

[0022] 2. This invention uses a double-cone head assembly to block the bottom end of the supporting cylinder. The top cone of the double-cone head assembly can block the bottom end of the supporting cylinder, and the bottom cone of the double-cone head assembly can play a better guiding role, thereby improving the axial alignment between the new hole and the original hole and improving the success quality. Attached Figure Description

[0023] Figure 1 This is a perspective view of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0024] Figure 2 This is a front view of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0025] Figure 3This is a side view of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0026] Figure 4 This is a perspective view of the main frame of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0027] Figure 5 This is a perspective view of a drill rod assembly of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0028] Figure 6 for Figure 5 Enlarged view of a portion of point A in the middle;

[0029] Figure 7 This is a perspective view of the soil sampling component of a borehole enlargement device for geotechnical engineering exploration proposed in this invention.

[0030] Figure 8 This is a perspective view of the drill bit of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0031] Figure 9 This is a cross-sectional view of the drill bit of a borehole enlargement device for geotechnical engineering exploration proposed in this invention;

[0032] Figure 10 for Figure 9 Enlarged view of section B in the middle;

[0033] Figure 11 This is a perspective view of the double-cone head assembly and suspension rod of a borehole enlargement device for geotechnical engineering exploration proposed in this invention.

[0034] The components include: 1. Support base; 101. Fixed / movable body; 102. Horizontal frame; 103. First connecting seat; 104. First connector; 105. Auxiliary support; 106. Adjustable outrigger; 2. Main frame; 201. Vertical frame; 202. Top plate; 203. Multi-stage hydraulic telescopic component; 204. First sliding block; 205. Sliding side plate; 206. Second connecting seat; 207. Sliding opening; 3. Drill rod assembly; 301. Sliding frame; 302. Second sliding seat; 303. Longitudinal plate; 304. Rib frame; 305. Hydraulic motor assembly; 306. Drill rod; 307. Third connecting seat; 4. Drill bit; 401. First rod body; 401a. Connecting female head; 401b. Mounting hole; 402. Disc body; 403. Reinforcing rib; 404. Second connector; 405. Fourth connector; 406. Enlarged head; 407. Center frame; 408. Bearing cylinder; 409. Sliding groove; 4010. Suspension rod; 4011. Double cone head assembly; 4012. Extended sliding component; 4013. Annular opening; 4014. Spring; 4015. Mounting head; 4016. Horizontal insert rod; 4017. Restricting rib; 5. Soil extraction assembly; 501. Connecting block; 502. Vertical plate; 503. Horizontal hydraulic telescopic component; 504. Soil receiving hopper; 505. U-shaped bracket; 505a. Guide bevel; 506. Reinforcing plate; 6. Hydraulic telescopic arm. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] like Figures 1-11As shown, this embodiment of the invention provides a geotechnical engineering exploration borehole enlargement device, including: a support base 1, a main frame 2, a drill rod assembly 3, a soil sampling assembly 5, and a drill bit 4 having a soil drilling assembly and a releasable soil storage assembly. The main frame 2 is rotatably mounted to the support base 1 near its bottom end, and a hydraulic telescopic arm 6 for adjusting the angle of the main frame 2 is installed between the main frame 2 and the support base 1. The hydraulic telescopic arm 6 can adjust the main frame 2 and the support base 1 to an angle of approximately 90°, i.e., the support base 1 is horizontal on the ground, and the main frame 2 is vertical, ensuring that the drill rod 306 of the drill rod assembly 3 is vertical. The hydraulic telescopic arm 6 can also adjust the main frame 2 and the support base 1 to an angle of approximately 45°, at which point the main frame 2 is in an upwardly tilted, retracted state, facilitating the overall movement of the geotechnical engineering exploration borehole enlargement device. The drill rod assembly 3 is slidably connected to the main frame 2, and is connected via a multi-stage hydraulic telescopic component 20 on the main frame 2. 3. The drill rod assembly 3 slides on the main frame 2. The drill bit 4 is movably installed at the bottom end of the drill rod assembly 3. The drill rod assembly 3 is driven to slide on the main frame 2 by the multi-stage hydraulic telescopic component 203. The drill rod component 306 is driven to rotate by the hydraulic motor group of the drill rod assembly 3, which in turn drives the drill bit 4 to rotate. This can realize the action of controlling the drill bit 4 to drill downward and to pick up upward. The soil sampling component 5 is installed near the bottom end of the main frame 2. The soil sampling component 5 has a telescopic soil receiving hopper 504. The drill bit 4 includes a soil drilling component and a releasable soil storage component. The soil receiving hopper 504 is provided with a matching device that cooperates with the releasable soil storage component. When the matching device cooperates with the releasable soil storage component, the releasable soil storage component releases the stored crushed rock and soil.

[0038] In operation, the hydraulic telescopic boom 6 adjusts the main frame 2 to a vertical position. Then, the hydraulic motor of the drill rod assembly 3 drives the drill rod 306 to rotate, which in turn drives the drill bit 4 to rotate. Simultaneously, the multi-stage hydraulic telescopic component 203 drives the entire drill rod assembly 3 to slide under the main frame 2. The drill bit 4 moves downward along with the drill rod assembly 3, completing the downward reaming drilling. When the releasable soil storage component is full of broken rock and soil, the hydraulic motor of the drill rod assembly 3 stops working, and the multi-stage hydraulic telescopic component 203 drives the entire drill rod assembly 3 to slide on the main frame 2. The drill bit 4 is then pulled out of the new hole (the reamed hole). The soil receiving hopper 504 of the soil sampling component 5 extends out and is located below the drill bit 4. When the fitting inside the soil receiving hopper 504 engages with the releasable soil storage component, the releasable soil storage component releases the stored crushed rock and soil, which falls onto the soil receiving hopper 504 and then slides down along the soil receiving hopper 504. The crushed soil can be transported to a predetermined location for storage using equipment such as a wheelbarrow or conveyor belt. This process does not require the use of slag removal equipment (equipment for removing slag from inside the new borehole), thereby simplifying the borehole enlargement process, shortening the borehole enlargement cycle, and avoiding the problem of crushed soil affecting the borehole quality during the slag removal process, thus improving the borehole quality.

[0039] In Example 1, as Figure 1The support base 1 includes a fixed / movable body 101, a cross frame 102, an auxiliary support 105, and adjustable outriggers 106. The fixed / movable body 101 can be a load-bearing vehicle body (flatbed), a movable main component, or a fixed assembly bracket, etc., and serves as a stable support. The cross frame 102 is fixedly installed on the top of the fixed / movable body 101, with its first end extending beyond the side of the fixed / movable body 101. A first connector 104 is fixedly connected to the first end of the cross frame 102, and the first connector 104 is rotatably mounted to a second connector 206 on the side of the main frame 2. First connectors 103 are fixedly connected to both sides of the second end of the cross frame 102, and an auxiliary support 105 is rotatably mounted on the first connector 103. An adjustable outrigger 106 is fixedly installed at the end of the auxiliary support 105 away from the cross frame 102.

[0040] When the borehole enlargement device is used for borehole enlargement operations in geotechnical engineering investigation, in order to ensure the stability of the fixed / movable body 101, the auxiliary supports 105 on both sides are unfolded and the bottom of the adjustable legs 106 is adjusted to be stably supported on the ground.

[0041] In Example 1, as Figure 1 and Figure 4 As shown, the main frame 2 includes a vertical frame 201. A second connecting seat 206 is fixedly connected to the back of the vertical frame 201 and near the bottom of the vertical frame 201. The second connecting seat 206 is rotatably installed with the support seat 1 to realize the rotatable connection between the vertical frame 201 and the support seat 1. A top plate 202 is fixedly installed at the top of the vertical frame 201. A multi-stage hydraulic telescopic component 203 is fixedly installed on the top of the top plate 202. The telescopic end of the multi-stage hydraulic telescopic component 203 can push the drill rod assembly 3 to slide as a whole. Sliding side plates 205 are fixedly connected to the left and right sides of the front side of the vertical frame 201. Two parallel first sliding blocks 204 are fixedly connected to the front side of the vertical frame 201 between the two sliding side plates 205. The first sliding blocks 204 are set to facilitate the connection of the drill rod assembly 3. The sliding side plates 205 are used to block and reduce / avoid soil debris from entering the first sliding blocks 204 and affecting the connection between the first sliding blocks 204 and the drill rod assembly 3. A sliding opening 207 is opened on the front side of the vertical frame 201 between the two first sliding blocks 204. The telescopic part of the multi-stage hydraulic telescopic component 203 is located inside the sliding opening 207.

[0042] To facilitate the installation of the soil sampling component 5, a rectangular opening is provided on the side of the vertical frame 201 and below the second connecting seat 206 for the soil sampling component 5 to pass through.

[0043] In Example 1, as Figure 5 and Figure 6As shown, the drill rod assembly 3 includes a hydraulic motor assembly 305, a longitudinal plate 303, a drill rod 306, and a second sliding seat 302. The hydraulic motor assembly 305 is a TMS series hydraulic motor, which is a low-speed, high-torque motor. The drill rod 306 is fixedly installed at the bottom output end of the hydraulic motor assembly 305, and a third connecting seat 307 is fixedly installed at the bottom end of the drill rod 306. The third connecting seat 307 is used to connect the drill bit 4. The drill rod 306 is driven by the hydraulic motor assembly 305, which in turn drives the drill bit 4 to rotate. The first side of the longitudinal plate 303 is fixedly connected to the housing of the hydraulic motor assembly 305 via the rib frame 304. The second side of the longitudinal plate 303 is fixedly connected to a second sliding seat 302, which is slidably installed with the first sliding block 204. The longitudinal plate 303 is located inside the two sliding side plates 205, which serve as retainers. The second side of the longitudinal plate 303 is fixedly connected to a sliding frame 301, which is located inside the sliding opening 207. The bottom telescopic end of the multi-stage hydraulic telescopic component 203 is fixedly installed with the sliding frame 301. The multi-stage hydraulic telescopic component 203 pushes the sliding frame 301, thereby pushing the longitudinal plate 303 and the hydraulic motor assembly 305 to move downward / upward. The second sliding seat 302 is slidably connected to the first sliding block 204, which serves as a guide.

[0044] In Example 1, as Figure 8 and Figure 11 As shown, the drill bit includes a first rod body 401, a disc body 402, a fourth connecting seat 405, and a reaming head 406. A connecting female head 401a is provided at the top of the first rod body 401, and a second connecting head 404 is threaded onto the top of the first rod body 401. The second connecting head 404 is movably mounted to the third connecting seat 307 at the bottom end of the drill rod 306 via a pin, allowing rotational transmission between the first rod body 401 and the drill rod 306, and enabling small-angle movement between the first rod body 401 and the drill rod 306. Figure 6 As shown, the third connecting seat 307 and the second connecting head 404 are configured such that the third connecting seat 307 is rotatable relative to the second connecting head 404 around the pin axis. The disc body 402 is fixedly connected to the side of the first rod body 401, and a fourth connecting seat 405 is fixedly connected to the bottom of the disc body 402 and located outside the first rod body 401. A reaming head 406 is rotatably mounted on the bottom of the fourth connecting seat 405, and multiple fourth connecting seats 405 and reaming heads 406 are arranged in a ring.

[0045] The disc 402, the fourth connecting seat 405, and the reaming head 406 rotate together with the first rod 401. The reaming head 406 drills into the rock and soil below to achieve the purpose of reaming the hole. In order to increase the connection strength between the disc 402 and the first rod 401, multiple sets of reinforcing ribs 403 are fixedly connected between the disc 402 and the first rod 401.

[0046] In Example 1, as Figure 8 and Figure 9 As shown, the releasable soil-holding assembly includes: a support cylinder 408, a suspension rod 4010, and a double-cone head assembly 4011. The top of the support cylinder 408 is rotatably connected to the portion of the first rod 401 located below the disc 402 via a central frame 407. Several annularly distributed limiting ribs 4017 are fixedly connected to the outer side of the support cylinder 408. During the hole-expanding process, the support cylinder 408 is pressed downwards into the original hole. The design of the limiting ribs 4017 prevents the support cylinder 408 from rotating with the first rod 401. The suspension rod 4011... A spring 4014 is fixedly connected to the top of 010, and a mounting head 4015 is fixedly connected to the top of the spring 4014. A mounting hole 401b is opened at the bottom of the first rod 401. The mounting head 4015 is located inside the mounting hole 401b, and the mounting head 4015 is connected to the mounting hole 401b through a transverse insert rod 4016. The transverse insert rod 4016 is located above the disc 402. The double cone head assembly 4011 is rotatably connected to the suspension rod 4010, and the top of the double cone head assembly 4011 is engaged with the bottom port of the bearing cylinder 408. The suspension rod 4010 has an annular opening 4013 on its side and below the double cone head assembly 4011. The annular opening 4013 facilitates cooperation with the U-shaped bracket 505 and can restrict the upward movement of the suspension rod 4010. When the releasable soil storage assembly moves upward as a whole, the suspension rod 4010 is stretched, and the spring 4014 is stretched, causing the double cone head assembly 4011 and the bearing cylinder 408 to move relative to each other. That is, the double cone head assembly 4011 cannot block the bottom end of the bearing cylinder 408, and the crushed rock and soil fall from the gap between the bottom end of the double cone head assembly 4011 and the bearing cylinder 408.

[0047] In Example 1, as Figure 9 As shown, an extended sliding member 4012 is fixedly connected to the outer side of the double-cone head assembly 4011, and a sliding groove 409 is provided on the inner side of the supporting cylinder 408. The extended sliding member 4012 slides in conjunction with the sliding groove 409. The sliding engagement between the extended sliding member 4012 and the sliding groove 409 prevents the double-cone head assembly 4011 and the supporting cylinder 408 from rotating relative to each other.

[0048] In Example 1, as Figure 7As shown, the soil sampling assembly 5 includes a connecting block 501, a vertical plate 502, a soil receiving hopper 504, a horizontal hydraulic telescopic component 503, and a U-shaped bracket 505. The top of the connecting block 501 is fixedly connected to the main frame 2, and the bottom of the connecting block 501 is fixedly installed with the vertical plate 502. Both the connecting block 501 and the vertical plate 502 serve as a connection. The horizontal hydraulic telescopic component 503 is fixedly connected to the vertical plate 502. The bottom of the soil receiving hopper 504 is fixedly connected to the telescopic end of the horizontal hydraulic telescopic component 503. The U-shaped bracket 505 is fixedly connected to the inner bottom of the soil receiving hopper 504, and a guide bevel 505a is provided on the inner side of the front end of the U-shaped bracket 505.

[0049] The horizontal hydraulic telescopic component 503 pushes the soil receiving hopper 504 to move laterally, and the U-shaped clamp 505 moves laterally along with the soil receiving hopper 504, locking the U-shaped clamp 505 at the annular opening 4013 on the side of the suspension rod 4010. As the drill bit 4 continues to move upward, it can pull the suspension rod 4010 and the double cone head assembly 4011 downward relative to the supporting cylinder 408. A reinforcing plate 506 is fixedly connected between the U-shaped clamp 505 and the soil receiving hopper 504, and the reinforcing plate 506 is used to increase the connection strength between the U-shaped clamp 505 and the soil receiving hopper 504.

[0050] Example 2 provides a method for borehole enlargement in geotechnical engineering investigation, using the borehole enlargement device from Example 1, specifically including the following steps:

[0051] S1. Control the drill rod assembly to be in the drilling state, specifically: the hydraulic telescopic arm adjusts the main frame to a vertical state, and the soil receiving hopper of the soil taking assembly is in a retracted state; this is used to ensure that the newly enlarged hole is in a vertical state.

[0052] S2. The reaming process is as follows: Multi-stage hydraulic telescopic components push the drill rod assembly downwards, and simultaneously, the drill rod assembly drives the drill bit to rotate. The releasable soil storage component guides the drill bit to its original borehole position. The rotating soil storage component reams the borehole. During reaming, the loose soil generated falls into the releasable soil storage component. When the releasable soil storage component is full, the drill rod assembly stops working, and the multi-stage hydraulic telescopic components push the drill rod assembly upwards. This completes the reaming action, and the loose rock and soil generated during reaming are collected by the releasable soil storage component, eliminating the need for slag removal equipment. The loose rock and soil generated during reaming do not affect the original borehole.

[0053] S3. Soil extraction process: When the drill bit is pulled out of the borehole, the soil extraction component controls the soil receiving hopper 504 to extend. The soil receiving hopper 504 blocks the new hole below. The U-shaped bracket 505 clamps the annular opening 4013 below the main suspension rod 4010, which can restrict the upward movement of the suspension rod 4010. When the releaseable soil storage component moves upward as a whole, the suspension rod 4010 is stretched, and the spring 4014 is stretched, causing the double cone head component 4011 and the bearing cylinder 408 to move relative to each other. That is, the double cone head component 4011 cannot block the bottom end of the bearing cylinder 408. The crushed rock and soil fall from the gap between the bottom end of the double cone head component 4011 and the bearing cylinder 408 into the soil receiving hopper 504, and the soil receiving hopper 504 guides the crushed soil to fall on the ground / cart.

[0054] Repeat steps S2 and S3 above until the geological exploration hole is expanded to the predetermined depth.

[0055] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A borehole enlargement device for geotechnical engineering exploration, comprising a support base (1) and a main frame (2), wherein the main frame (2) is rotatably mounted to the support base (1) on one side near its bottom end, and a hydraulic telescopic arm (6) for adjusting the angle of the main frame (2) is installed between the main frame (2) and the support base (1), characterized in that: It also includes a drill rod assembly (3) and a soil sampling assembly (5). The drill rod assembly (3) is slidably connected to the main frame (2), and the drill rod assembly (3) is controlled to slide on the main frame (2) by a multi-stage hydraulic telescopic component (203) on the main frame (2). A drill bit (4) is movably installed at the bottom end of the drill rod assembly (3). The soil sampling assembly (5) is installed on the main frame (2) near the bottom end, and the soil sampling assembly (5) has a telescopic soil receiving bucket (504). The drill bit (4) includes a soil drilling assembly and a releasable soil storage assembly. The soil storage assembly is located below the soil drilling assembly. The soil storage assembly includes a support cylinder (408), a suspension rod (4010), and a double-cone head assembly (4011). The support cylinder (408) is rotatably connected to the central drill rod of the soil drilling assembly. The suspension rod (4010) is connected to the central drill rod of the soil drilling assembly through an elastic connector. The double-cone head assembly (4011) is rotatably connected to the suspension rod (4010), and the top end of the double-cone head assembly (4011) mates with the bottom port of the support cylinder (408). The soil receiving hopper (504) is provided with a fitting device that mates with the suspension rod (4010). The bearing cylinder (408) is used to collect crushed rock and soil during the hole enlargement process. When the drill bit (4) is pulled out of the hole, the soil receiving hopper (504) extends to below the drill bit (4). The suspension rod (4010) is restricted to move upward by the coupling device. The suspension rod (4010) is under tension, causing the double cone head assembly (4011) to move relative to the bearing cylinder (408). The bottom end of the bearing cylinder (408) opens, and the crushed rock and soil in the bearing cylinder (408) falls into the soil receiving hopper (504). The main frame (2) includes a vertical frame (201), a top plate (202) is fixedly installed at the top of the vertical frame (201), the multi-stage hydraulic telescopic component (203) is fixedly installed at the top of the top plate (202), sliding side plates (205) are fixedly connected to the left and right sides of the front side of the vertical frame (201), two parallel first sliding blocks (204) are fixedly connected to the front side of the vertical frame (201) between the two sliding side plates (205), a sliding opening (207) is opened on the front side of the vertical frame (201) between the two first sliding blocks (204), the telescopic part of the multi-stage hydraulic telescopic component (203) is located inside the sliding opening (207), and a second connecting seat (206) is fixedly connected to the back of the vertical frame (201) near the bottom end of the vertical frame (201). The second connecting seat (206) is rotatably installed with the support seat (1); a rectangular opening for the soil-collecting component (5) to pass through is provided on the side of the vertical frame (201) and below the second connecting seat (206).

2. The geotechnical engineering exploration borehole enlargement device according to claim 1, characterized in that, The support base (1) includes: a fixed body / movable body (101) and a cross frame (102). The cross frame (102) is fixedly installed on the top of the fixed body / movable body (101), and the first end of the cross frame (102) extends out of the side of the fixed body / movable body (101). The first end of the cross frame (102) is fixedly connected to a first connector (104). The first connector (104) is rotatably installed with a second connector (206) on the side of the main frame (2). The two sides of the second end of the cross frame (102) are fixedly connected to a first connector (103). An auxiliary support (105) is rotatably installed on the first connector (103). An adjustable support leg (106) is fixedly installed on the end of the auxiliary support (105) away from the cross frame (102).

3. A borehole enlargement device for geotechnical engineering exploration according to claim 1 or 2, characterized in that, The soil drilling assembly includes a first rod body (401) and a disc body (402). A connecting female head (401a) is provided on the top of the first rod body (401). A second connecting head (404) is threaded on the top of the first rod body (401). The second connecting head (404) is movably installed with a third connecting seat (307) at the bottom end of the drill rod (306) by means of a pin. The disc body (402) is fixedly connected to the side of the first rod body (401). A fourth connecting seat (405) is fixedly connected to the bottom of the disc body (402) and outside the first rod body (401). A reaming head (406) is rotatably installed at the bottom of the fourth connecting seat (405). Multiple fourth connecting seats (405) and reaming heads (406) are arranged in a ring. Multiple sets of reinforcing ribs (403) are fixedly connected between the disc body (402) and the first rod body (401).

4. A borehole enlargement device for geotechnical engineering exploration according to claim 1 or 2, characterized in that, The drill rod assembly (3) includes a hydraulic motor assembly (305) and a longitudinal plate (303). The bottom output end of the hydraulic motor assembly (305) is fixedly installed with a drill rod (306), and the bottom end of the drill rod (306) is fixedly installed with a third connecting seat (307). The first side of the longitudinal plate (303) is fixedly connected to the housing of the hydraulic motor assembly (305) via the rib frame (304). The second side of the longitudinal plate (303) is fixedly connected to a second sliding seat (302). The second sliding seat (302) is slidably installed with the first sliding block (204). The longitudinal plate (303) is located inside the two sliding side plates (205). The second side of the longitudinal plate (303) is fixedly connected to a sliding frame (301). The sliding frame (301) is located inside the sliding port (207). The bottom telescopic end of the multi-stage hydraulic telescopic component (203) is fixedly installed with the sliding frame (301).

5. The geotechnical engineering exploration borehole enlargement device according to claim 4, characterized in that: The top of the bearing cylinder (408) is rotatably connected to the part of the first rod (401) located below the disc (402) via a central frame (407). Several ring-shaped limiting ribs (4017) are fixedly connected to the outer side of the bearing cylinder (408). A spring (4014) is fixedly connected to the top of the suspension rod (4010). A mounting head (4015) is fixedly connected to the top of the spring (4014). A mounting hole (401b) is opened at the bottom end of the first rod (401). The mounting head (4015) is located inside the mounting hole (401b). The mounting head (4015) and the mounting hole (401b) are connected by a transverse insert (4016). The transverse insert (4016) is located above the disc (402).

6. The geotechnical engineering exploration borehole enlargement device according to claim 5, characterized in that: An extended sliding member (4012) is fixedly connected to the outer side of the double cone head assembly (4011), and a sliding groove (409) is provided on the inner side of the bearing cylinder (408). The extended sliding member (4012) slides in cooperation with the sliding groove (409).

7. A borehole enlargement device for geotechnical engineering investigation according to claim 5, characterized in that, The soil extraction assembly (5) includes a connecting block (501) and a horizontal hydraulic telescopic component (503). The top of the connecting block (501) is fixedly connected to the main frame (2), and a vertical plate (502) is fixedly installed at the bottom of the connecting block (501). The horizontal hydraulic telescopic component (503) is fixedly connected to the vertical plate (502), and the bottom of the soil receiving hopper (504) is fixedly connected to the telescopic end of the horizontal hydraulic telescopic component (503).

8. The geotechnical engineering exploration borehole enlargement device according to claim 7, characterized in that: The fitting device is a U-shaped bracket (505), which is fixedly connected to the inner bottom of the soil receiving hopper (504). The front end of the U-shaped bracket (505) is provided with a guide bevel (505a). The side of the suspension rod (4010) and below the double cone head assembly (4011) is provided with an annular opening (4013) for fitting with the U-shaped bracket (505). A reinforcing plate (506) is fixedly connected between the U-shaped bracket (505) and the soil receiving hopper (504).

9. A method for borehole enlargement in geotechnical engineering investigation, characterized in that, The method of enlarging a borehole using the borehole enlargement device described in any one of claims 1-8 specifically includes the following steps: S1. Control the drill rod assembly to be in the drilling state. At this time, the hydraulic telescopic boom adjusts the main frame to a vertical state, and the soil receiving bucket of the soil taking assembly is in the retracted state. S2. After preparation, begin hole enlargement. The multi-stage hydraulic telescopic component pushes the drill rod assembly downward, and simultaneously drives the drill bit to rotate. The releasable soil storage component of the drill bit guides the drill bit to the original hole position. The rotating soil storage component enlarges the hole. The broken soil generated during the hole enlargement process falls into the bearing cylinder of the releasable soil storage component. When the broken soil in the bearing cylinder is full, the drill rod assembly stops working, and the multi-stage hydraulic telescopic component pushes the drill rod assembly upward. S3. When the drill bit is pulled out of the borehole, the soil receiving component controls the soil receiving bucket to extend. The soil receiving bucket blocks the new hole below. The mate and the suspension rod work together to restrict the suspension rod from moving upward. The suspension rod is under tension, causing the double cone head assembly and the bearing cylinder to move relative to each other. The bottom of the bearing cylinder opens, releasing the crushed rock and soil in the bearing cylinder into the soil receiving bucket. The soil receiving bucket then guides the crushed soil to fall onto the ground / bucket.

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