A building construction deep foundation pit drilling device

Abstract

The application relates to a deep foundation pit drilling device for house building, which comprises a base, a first fixed plate, a second fixed plate, a first lead screw, a second lead screw, a first nut, a second nut, a first guide plate, a second guide plate, a first connecting plate, a second connecting plate and a first machine case.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and in particular relates to a drilling device for deep foundation pits in building construction. Background Technology

[0002] Deep foundation pit exploration for construction includes drilling operations. Drilling equipment drills downwards from the ground surface, forming cylindrical boreholes in the strata to identify and delineate the strata. Core samples, mineral samples, and soil samples can be obtained from different depths in the borehole for analysis and research. This data is used to determine the physical and mechanical properties and indicators of the rocks and soil layers, providing data support for building structural design.

[0003] Existing drilling equipment is mainly divided into rotary and percussion types. Rotary drilling equipment is suitable for soils that are not very hard, while percussion equipment is generally used for rocks or other harder geological formations. In existing geological drilling equipment, during rotary drilling, the drill rod is subjected to the impact force of the formation. This impact force causes uneven stress on the drill rod, making it prone to shaking during drilling, affecting the drilling effect and thus the accuracy of the formation measurement data. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a drilling device for deep foundation pits in building construction, so as to solve the technical problem in the prior art that the drill rod is easily shaken during the drilling process due to the impact force, which affects the accuracy of the stratum measurement data.

[0005] To achieve the above objectives, the technical solution adopted by the deep foundation pit drilling device for building construction of the present invention is as follows: A drilling device for deep foundation pits in building construction includes: Base: Used to fix it to the ground surface; First fixing plate: fixed to the upper surface of the base, the first fixing plate has a first guide hole that runs through the front and back; Second fixing plate: fixed on the upper surface of the base. The first fixing plate and the second fixing plate are arranged parallel to each other in the front and back. The second fixing plate is provided with a second guide elongated hole that runs through the front and back. The first guide elongated hole and the second guide elongated hole are arranged correspondingly in the front and back direction. First lead screw: Located on the front side of the first fixed plate, the first lead screw is rotatably set relative to the first fixed plate; Second lead screw: Located on the rear side of the second fixed plate, the second lead screw is rotatably set relative to the second fixed plate; First nut: Adapted to the first lead screw thread; Second nut: Adapted to the thread of the second lead screw; First guide plate: disposed on the rear side of the first fixed plate. The first guide plate and the first nut are fixedly connected by the first connecting plate. The first connecting plate passes through the first guide elongated hole and guides the first guide plate to move up and down relative to the first fixed plate. Second guide plate: It is set on the front side of the second fixed plate. The second guide plate and the second nut are fixedly connected by the second connecting plate. The second connecting plate passes through the second guide elongated hole. The second guide plate moves up and down relative to the second fixed plate. The first guide plate and the second guide plate are arranged in a corresponding manner. A first housing is fixedly arranged between the first guide plate and the second guide plate. A first drive device and a screw rod that are connected to the first drive device are arranged in the first housing. The screw rod extends in the vertical direction. A clearance space for the screw rod is provided on the base. Second drive unit: connected to the first lead screw and the second lead screw transmission.

[0006] Beneficial effects: In the deep foundation pit drilling device for building construction of the present invention, the first housing is fixed between the first guide plate and the second guide plate. The first guide plate can move up and down along the first lead screw, and the second guide plate can move up and down along the second lead screw. The first housing can move up and down under the action of the first guide plate and the second guide plate, thereby driving the spiral rod to move up and down. In the present invention, when the spiral rod moves downward and is subjected to an impact force, since the upper end of the spiral rod is fixed between the first guide plate and the second guide plate through the housing, even if the spiral rod is subjected to an impact force, it can be absorbed by the first guide plate and the second guide plate through the first housing, thereby avoiding the spiral rod from shaking in the front and back direction and ensuring the drilling effect of the spiral rod.

[0007] Furthermore, the screw rod includes a coaxially arranged optical axis segment and a helical segment. The optical axis segment is located above the first housing, and the helical segment is located below the first housing. A first guide sleeve is fitted onto the helical segment, and the first guide sleeve is fixed in the front-back direction and the left-right direction. A second guide sleeve is fitted onto the optical axis segment, and the second guide sleeve is fixed in the front-back direction and the left-right direction. When the screw rod rotates downward, the first guide sleeve and the second guide sleeve move away from each other in the vertical direction.

[0008] Beneficial effects: The first guide sleeve and the second guide sleeve move away from each other as the auger screw rotates downwards, thereby increasing the distance between them. In other words, the interval between the guide points of the auger screw increases. As a result, when the lower end of the auger screw is subjected to an impact force, the guide point distance is larger, which can position the auger screw at the upper and middle parts respectively. This ensures that the auger screw has high stability when rotating downwards, thus ensuring the quality of the borehole and the accuracy of the formation measurement data.

[0009] Furthermore, a first horizontal plate and a second horizontal plate are fixedly connected to the top of the first fixed plate and the top of the second fixed plate, with the first horizontal plate and the second horizontal plate spaced apart to the left and right; a third lead screw and a fourth lead screw are respectively arranged opposite each other on the left and right sides of the spiral rod, the third lead screw is rotatably disposed between the first horizontal plate and the base, and the fourth lead screw is rotatably disposed between the second horizontal plate and the base; the third lead screw includes a first upper thread section and a first lower thread section with opposite spiral directions, the upper thread of the first upper thread section is adapted to a third nut, and the upper thread of the first lower thread section is adapted to a fourth nut; the fourth lead screw includes a second upper thread section and a second lower thread section with opposite spiral directions, the upper thread of the second upper thread section is adapted to a fifth nut, and the upper thread of the second lower thread section is adapted to a sixth nut; the first guide sleeve is fixedly connected to the fourth nut and the sixth nut, and the second guide sleeve is fixedly connected to the third nut and the fifth nut.

[0010] Beneficial effects: The setting of the third and fourth lead screws enables the first guide cylinder and the second guide cylinder to move away from each other when the auger is rotated downwards. Furthermore, since the top of the first fixed plate and the top of the second fixed plate are fixedly connected to the first horizontal plate and the second horizontal plate, the overall stability of the drilling device of the present invention is enhanced.

[0011] Furthermore, the pitch of the first threaded section and the pitch of the second threaded section are equal, and the pitch of the first threaded section is equal to the pitch of the first lead screw.

[0012] Beneficial effect: When the first lead screw and the second lead screw drive the first housing to move downward, the first guide sleeve can move downward synchronously with the first housing, so that the first guide sleeve is located at the upper part of the helical section of the auger, thus avoiding the first guide sleeve affecting the maximum drilling depth of the auger.

[0013] Furthermore, the first lead screw is threaded with a seventh nut, which is spaced below the first nut. The second lead screw is threaded with an eighth nut, which is spaced below the second nut. The first guide sleeve is fixedly connected to the seventh nut and the eighth nut in the front-rear direction, respectively.

[0014] Beneficial effects: The setting of the seventh and eighth nuts ensures the stability of the first guide sleeve's up-and-down movement, and also ensures that the first guide sleeve is subjected to uniform force in the front-to-back and left-to-right directions, enabling the first guide sleeve to provide stable guidance for the screw rod.

[0015] A filter screen is fixedly connected to the side wall of the first chassis near the first drive device, and the filter screen is provided with heat dissipation holes.

[0016] Beneficial effect: The filter can help dissipate heat from the first drive unit in the first chassis.

[0017] A first guide rod and a second guide rod are fixedly installed on the rear side of the first fixed plate. The first guide rod and the second guide rod are spaced apart from each other on the left and right sides. The left and right sides of the first guide plate are respectively provided with a first guide hole adapted to guide the first guide rod and a second guide hole adapted to guide the second guide rod. A third guide rod and a fourth guide rod are fixedly installed on the front side of the second fixed plate. The third guide rod and the fourth guide rod are spaced apart from each other on the left and right sides. The left and right sides of the second guide plate are respectively provided with a third guide hole adapted to guide the third guide rod and a fourth guide hole adapted to guide the fourth guide rod.

[0018] Beneficial effects: The first and second guide rods make the first guide plate more stable during up-and-down movement, and the third and fourth guide rods make the second guide plate more stable during up-and-down movement.

[0019] The base includes a first base plate and a second base plate, both of which extend in the front-to-back direction and are spaced apart from each other in the left-to-right direction. The front and rear ends of the first base plate are fixed to the ground by long screws, and the front and rear ends of the second base plate are also fixed to the ground by long screws. The first fixing plate is fixed between the first base plate and the second base plate, and the second fixing plate is fixed between the first base plate and the second base plate.

[0020] Beneficial effect: The base structure is more stable.

[0021] Rollers are rotatably mounted on the underside of the first base plate and the second base plate.

[0022] Beneficial effect: The rollers facilitate the movement of the first and second base plates. Attached Figure Description

[0023] Figure 1 This is a left view of a deep foundation pit drilling device for building construction according to the present invention; Figure 2 yes Figure 1 A rear view of a deep foundation pit drilling device for building construction (excluding the second fixing plate); Figure 3 yes Figure 2 A schematic diagram of the internal structure of a deep foundation pit drilling device for building construction.

[0024] Reference numerals: 1-Base; 2-Long screw; 3-Roller; 4-First fixing plate; 5-Second fixing plate; 6-First guide elongated hole; 7-Second guide elongated hole; 8-First lead screw; 9-Second lead screw; 10-First nut; 11-Second nut; 12-First guide plate; 13-Second guide plate; 14-First connecting plate; 15-Second connecting plate; 16-First guide rod; 17-Third guide rod; 18-First housing; 19-Spiral section; 20-Optical axis section; 21-First guide sleeve; 22-Second guide sleeve; 23-Seventh nut; 24-Eighth nut; 25-Third lead screw; 26-Fourth lead screw; 27-Fourth nut; 28-Sixth nut; 29-Third nut; 30-Fifth nut; 31-First base plate; 32-Second base plate; 33-First drive motor; 34-Filter screen. Detailed Implementation

[0025] The following is a detailed description of a deep foundation pit drilling device for building construction according to the present invention, with reference to the accompanying drawings and specific embodiments: like Figure 1 As shown, a deep foundation pit drilling device for building construction according to the present invention includes a base 1, which is used to fix it on the ground surface. The base 1 includes a first base plate 31 and a second base plate 32. The first base plate 31 and the second base plate 32 are both extended in the front-back direction and are spaced apart from each other on the left and right. The front and rear ends of the first base plate 31 are fixed to the ground by long screws 2, and the front and rear ends of the second base plate 32 are fixed to the ground by long screws 2. In order to facilitate the movement of the first base plate 31 and the second base plate 32, rollers 3 are respectively rotatably arranged under the first base plate 31 and the second base plate 32.

[0026] A first fixing plate 4 and a second fixing plate 5 are fixed between the first base plate 31 and the second base plate 32. The first fixing plate 4 and the second fixing plate 5 are arranged parallel to each other and spaced apart. The first fixing plate 4 has a first guide elongated hole 6 that extends through the front and back and extends in the vertical direction. The second fixing plate 5 has a second guide elongated hole 7 that extends through the front and back and extends in the vertical direction. The first guide elongated hole 6 and the second guide elongated hole 7 are arranged correspondingly in the front and back direction.

[0027] A first lead screw 8 is provided on the front side of the first fixed plate 4. The first lead screw 8 is rotatably disposed relative to the first fixed plate 4 and is located directly in front of the first guide elongated hole 6. The first lead screw 8 is threadedly fitted with a first nut 10. A second lead screw 9 is provided on the rear side of the second fixed plate 5. The second lead screw 9 is rotatably disposed relative to the second fixed plate 5 and is located directly behind the second guide elongated hole 7. The second lead screw 9 is threadedly fitted with a second nut 11.

[0028] The first guide plate 12 is disposed on the rear side of the first fixed plate 4. The first guide plate 12 and the first nut 10 are fixedly connected by the first connecting plate 14. The first connecting plate 14 passes through the first guide elongated hole 6 and slides with the first guide elongated hole 6. The first guide plate 12 moves downward relative to the first fixed plate 4. Specifically, the rear side of the first fixed plate 4 is fixedly provided with a first guide rod 16 and a second guide rod. The first guide rod 16 and the second guide rod extend in the vertical direction respectively. The first guide rod 16 and the second guide rod are spaced apart on the left and right sides. The left and right sides of the first guide plate 12 are respectively provided with a first guide hole adapted to the first guide rod 16 and a second guide hole adapted to the second guide rod.

[0029] The second guide plate 13 is disposed on the front side of the second fixed plate 5. The second guide plate 13 and the second nut 11 are fixedly connected by the second connecting plate 15. The second connecting plate 15 passes through the second guide elongated hole 7 and slides with the second guide elongated hole 7. The second guide plate 13 moves up and down relative to the second fixed plate 5. Specifically, the front side of the second fixed plate 5 is provided with a third guide rod 17 and a fourth guide rod. The third guide rod 17 and the fourth guide rod extend in the up and down direction respectively. The third guide rod 17 and the fourth guide rod are spaced apart on the left and right sides. The left and right sides of the second guide plate 13 are respectively provided with a third guide hole adapted to the guide of the third guide rod 17 and a fourth guide hole adapted to the guide of the fourth guide rod.

[0030] The first guide plate 12 and the second guide plate 13 are at the same height in the vertical direction and are arranged correspondingly front to back. A first housing 18 is fixedly installed between the first guide plate 12 and the second guide plate 13. The first housing 18 is cuboid in shape and contains a first driving device and a spiral rod that is driven by the first driving device. In this embodiment, the first driving device is a first driving motor 33. The first driving motor 33 is driven by a transmission belt to the upper end of the spiral rod, and the spiral rod extends vertically. In this embodiment, in order to facilitate heat dissipation of the first driving motor 33, a filter screen 34 is fixedly connected to the side wall of the first housing 18 near the first driving motor 33. The filter screen 34 is provided with heat dissipation holes.

[0031] The base 1 is provided with a clearance space for the spiral rod. In this embodiment, the space between the first base plate 31 and the second base plate 32 of the base 1 provides a space for the spiral rod to rotate.

[0032] In this embodiment, the first lead screw 8 is connected to the second drive device, which is a second drive motor. The second lead screw 9 is connected to the first lead screw 8 via a transmission belt. Under the action of the second drive motor, the first lead screw 8 and the second lead screw 9 rotate, and the first nut 10 moves up and down along the first lead screw 8. The first nut 10 drives the first guide plate 12 to move up and down, and the second nut 11 moves up and down along the second lead screw 9. The second nut 11 carries the second guide plate 13 to move up and down; thus, the first guide plate 12 and the second guide plate 13 drive the first housing 18 to move up and down, that is, drive the screw rod in the first housing 18 to move up and down. Under the drive of the first drive motor 33, the lower end of the screw rod contacts the ground and gradually rotates downward.

[0033] In this embodiment, the screw rod includes a coaxially arranged optical axis segment 20 and a helical segment 19. The optical axis segment 20 is located above the first housing 18, and the helical segment 19 is located below the first housing 18. A first guide sleeve 21 is fitted onto the helical segment 19, and the first guide sleeve 21 is fixed in the front-back direction and the left-right direction. A second guide sleeve 22 is fitted onto the optical axis segment 20, and the second guide sleeve 22 is fixed in the front-back direction and the left-right direction. When the screw rod rotates downward, the first guide sleeve 21 and the second guide sleeve 22 move away from each other in the vertical direction; when the screw rod rotates upward, the first guide sleeve 21 and the second guide sleeve 22 move closer to each other. In this embodiment, the first guide sleeve 21 is guided and slidably adapted to the helical segment 19 of the screw rod, and the second guide sleeve 22 is guided and slidably adapted to the optical axis segment 20 of the screw rod.

[0034] In this embodiment, a first horizontal plate and a second horizontal plate are fixedly connected to the top of the first fixed plate 4 and the top of the second fixed plate 5, respectively. The first horizontal plate and the second horizontal plate are spaced apart to the left and right. A third lead screw 25 and a fourth lead screw 26 are respectively arranged opposite to each other on the left and right sides of the screw rod. The third lead screw 25 is rotatably disposed between the first horizontal plate and the base 1, and the fourth lead screw 26 is rotatably disposed between the second horizontal plate and the base 1. The third lead screw 25 includes a first upper thread section and a first lower thread section with opposite directions of rotation. The first upper thread section is threaded with a third nut 29, and the first lower thread section is threaded with a fourth nut 27. The fourth lead screw 26 includes... The spiral has a second upper thread section and a second lower thread section with opposite spiral directions. The upper thread of the second upper thread section is fitted with a fifth nut 30, and the upper thread of the second lower thread section is fitted with a sixth nut 28. The fourth nut 27 and the sixth nut 28 are respectively located on the left and right sides of the first guide sleeve 21. The first guide sleeve 21 is fixedly connected to the fourth nut 27 and the sixth nut 28 respectively through a connecting rod extending in the left and right direction. The third nut 29 and the fifth nut 30 are respectively located on the left and right sides of the second guide sleeve 22. The second guide sleeve 22 is fixedly connected to the third nut 29 and the fifth nut 30 through a connecting rod extending in the left and right direction.

[0035] In order for the first guide sleeve 21 to move downward as the first housing 18 moves downward, or to move upward as the first housing 18 moves upward, in this embodiment, the pitch of the first lower thread segment and the pitch of the second lower thread segment are equal, and the pitch of the first lower thread segment is equal to the pitch of the first lead screw 8.

[0036] In this embodiment, the third lead screw 25 is connected to the third drive device, which is a third drive motor. The speed of the third drive motor is the same as that of the second drive motor, so that the speeds of the third lead screw 25, the fourth lead screw 26, the first lead screw 8, and the second lead screw 9 are equal. Thus, the downward spiral speed of the screw rod is equal to the downward movement speed of the first guide sleeve 21. That is, the position of the first guide sleeve 21 relative to the spiral segment 19 of the screw rod remains unchanged in the vertical direction. This ensures the guiding effect of the first guide sleeve 21 on the spiral segment 19 and prevents the first guide sleeve 21 from moving upward relative to the spiral segment 19, thereby affecting the downward movement of the first housing 18. It also prevents the first guide sleeve 21 from moving downward relative to the spiral segment 19, thereby affecting the spiral length of the spiral segment 19 below the ground surface. Furthermore, the pitches of the first and second upper thread sections are equal, and the pitch of the first upper thread section is equal to the pitch of the first lead screw 8. This causes the second guide sleeve 22 to move upward at a speed equal to the speed of the first housing 18 moving downward. In other words, relative to the first housing 18, the second guide sleeve 22 moves away from the first housing 18 at twice the downward speed of the auger. This allows the second guide sleeve 22 to quickly move away from the first guide sleeve 21. As a result, the distance between the first guide sleeve 21 and the second guide sleeve 22 on the auger increases, thus providing a better guiding effect on the auger and preventing the auger from deflecting during downward rotation, which would affect the drilling quality.

[0037] Furthermore, a seventh nut 23 is screwed onto the first lead screw 8, positioned below the first nut 10. An eighth nut 24 is screwed onto the second lead screw 9, positioned below the second nut 11. The seventh nut 23 and the eighth nut 24 are located on the front and rear sides of the first guide sleeve 21, respectively. The first guide sleeve 21 is fixedly connected to the seventh nut 23 and the eighth nut 24 via connecting rods extending in the front-rear direction and passing sequentially through the first and second guide holes. Thus, the first guide sleeve 21 is connected to the third lead screw 25 and the fourth lead screw 26 in the left-right direction via the fourth nut 27 and the sixth nut 28, and to the first lead screw 8 and the second lead screw 9 in the front-rear direction via the seventh nut 23 and the eighth nut 24, thereby ensuring the stability of the first guide sleeve 21 in both the front-rear and left-right directions.

[0038] In use, the drilling device for deep foundation pits in building construction of the present invention first moves the drilling device to the target drilling position, then uses long screws 2 to fix the first base plate 31 and the second base plate 32 to the ground, and then drives the auger rod to rotate through the first drive motor 33. Then, the second drive motor and the third drive motor work simultaneously. The second drive motor drives the first lead screw 8 and the second lead screw 9 to rotate simultaneously, and the third drive motor drives the third lead screw 25 and the fourth lead screw 26 to rotate simultaneously. At this time, the first housing 18 moves downward, so that the lower end of the auger rod is screwed downward into the ground. At the same time, the first guide sleeve 21 and the helical section 19 of the auger rod move downward simultaneously. The first guide sleeve 21 guides the helical section 19 of the auger rod, and when the first guide sleeve 21 moves downward, the fourth nut 27, the sixth nut 28, the seventh nut 23, and the eighth nut 24 move downward synchronously, ensuring the stability of the downward movement of the first guide sleeve 21. As the auger rotates downwards, the second guide sleeve 22 moves upwards relative to the auger, thereby increasing the distance between the second guide sleeve 22 and the first guide sleeve 21. Thus, under the combined guiding action of the first guide sleeve 21 and the second guide sleeve 22, the auger can rotate vertically downwards, preventing deviation during the downward rotation of the auger and ensuring that the hole drilled by the auger has high quality, thereby ensuring the accuracy of the formation measurement data.

[0039] In the above embodiments, the spiral rod includes a coaxially arranged optical axis segment and a spiral segment. The optical axis segment is located above the first housing, and the spiral segment is located below the first housing. A first guide sleeve is fitted onto the spiral segment, and the first guide sleeve is fixed in the front-back direction and the left-right direction. A second guide sleeve is fitted onto the optical axis segment, and the second guide sleeve is fixed in the front-back direction and the left-right direction. When the spiral rod rotates downward, the first guide sleeve and the second guide sleeve move away from each other in the vertical direction. In other embodiments, the spiral rod only includes a spiral segment, which is located below the first housing. A first guide sleeve is fitted onto the spiral segment, and the first guide sleeve is fixed in the front-back direction and the left-right direction. When the spiral rod rotates downward, the first guide sleeve moves downward.

[0040] In the above embodiments, the first lead screw is threaded with a seventh nut, which is spaced below the first nut. The second lead screw is threaded with an eighth nut, which is spaced below the second nut. The first guide sleeve is fixedly connected to the seventh nut and the eighth nut in the front-back direction, respectively. In other embodiments, the seventh nut and the eighth nut may not be provided. In this case, the first guide sleeve is only connected to the third lead screw and the fourth lead screw through the fourth nut and the sixth nut.

[0041] In the above embodiments, a filter screen is fixedly connected to the side wall of the first chassis near the first drive device, and heat dissipation holes are provided on the filter screen; in other embodiments, the filter screen may not be provided.

[0042] In the above embodiments, a first guide rod and a second guide rod are fixedly disposed on the rear side of the first fixing plate, with the first guide rod and the second guide rod spaced apart to the left and right. A first guide hole adapted to guide the first guide rod and a second guide hole adapted to guide the second guide rod are respectively disposed on the left and right sides of the first guide plate. A third guide rod and a fourth guide rod are fixedly disposed on the front side of the second fixing plate, with the third guide rod and the fourth guide rod spaced apart to the left and right. A third guide hole adapted to guide the third guide rod and a fourth guide hole adapted to guide the fourth guide rod are respectively disposed on the left and right sides of the second guide plate. In other embodiments, the first guide rod and the second guide rod may not be provided. In this case, the first guide plate slides and is guided by the first guide elongated hole through the first connecting plate. The third guide rod and the fourth guide rod may also not be provided. In this case, the second guide plate slides and is guided by the second guide elongated hole through the second connecting plate.

[0043] In the above embodiments, rollers are rotatably provided below the first base plate and the second base plate; in other embodiments, rollers may not be provided.

Claims

1. A drilling device for deep foundation pits in building construction, characterized in that, include: Base: Used to fix it to the ground surface; First fixing plate: fixed to the upper surface of the base, the first fixing plate has a first guide hole that runs through the front and back; Second fixing plate: fixed on the upper surface of the base. The first fixing plate and the second fixing plate are arranged parallel to each other in the front and back. The second fixing plate is provided with a second guide elongated hole that runs through the front and back. The first guide elongated hole and the second guide elongated hole are arranged correspondingly in the front and back direction. First lead screw: Located on the front side of the first fixed plate, the first lead screw is rotatably set relative to the first fixed plate; Second lead screw: Located on the rear side of the second fixed plate, the second lead screw is rotatably set relative to the second fixed plate; First nut: Adapted to the first lead screw thread; Second nut: Adapted to the thread of the second lead screw; First guide plate: disposed on the rear side of the first fixed plate. The first guide plate and the first nut are fixedly connected by the first connecting plate. The first connecting plate passes through the first guide elongated hole and guides the first guide plate to move up and down relative to the first fixed plate. Second guide plate: It is set on the front side of the second fixed plate. The second guide plate and the second nut are fixedly connected by the second connecting plate. The second connecting plate passes through the second guide elongated hole. The second guide plate moves up and down relative to the second fixed plate. The first guide plate and the second guide plate are arranged in a corresponding manner, and a first housing is fixedly arranged between the first guide plate and the second guide plate. The first housing is equipped with a first drive device and a screw rod that is connected to the first drive device in a transmission manner. The screw rod extends in the vertical direction, and a clearance space is provided on the base to avoid the screw rod. Second drive unit: connected to the first lead screw and the second lead screw transmission; The screw rod includes a coaxial optical axis section and a helical section. The optical axis section is located above the first housing, and the helical section is located below the first housing. A first guide sleeve is fitted onto the helical section, and the first guide sleeve is fixed in the front-back direction and the left-right direction. A second guide sleeve is fitted onto the optical axis section, and the second guide sleeve is fixed in the front-back direction and the left-right direction. When the screw rod rotates downward, the first guide sleeve and the second guide sleeve move away from each other in the vertical direction. A first horizontal plate and a second horizontal plate are fixedly connected to the top of the first fixed plate and the top of the second fixed plate, with the first horizontal plate and the second horizontal plate spaced apart to the left and right. A third lead screw and a fourth lead screw are respectively arranged opposite each other on the left and right sides of the spiral rod. The third lead screw is rotatably disposed between the first horizontal plate and the base, and the fourth lead screw is rotatably disposed between the second horizontal plate and the base. The third lead screw includes a first upper thread section and a first lower thread section with opposite spiral directions. The upper thread of the first upper thread section is fitted with a third nut, and the upper thread of the first lower thread section is fitted with a fourth nut. The fourth lead screw includes a second upper thread section and a second lower thread section with opposite spiral directions. The upper thread of the second upper thread section is fitted with a fifth nut, and the upper thread of the second lower thread section is fitted with a sixth nut. The first guide sleeve is fixedly connected to the fourth nut and the sixth nut, and the second guide sleeve is fixedly connected to the third nut and the fifth nut. The pitch of the first threaded section and the pitch of the second threaded section are equal, and the pitch of the first threaded section is equal to the pitch of the first lead screw. The first lead screw is threaded with a seventh nut, which is spaced below the first nut. The second lead screw is threaded with an eighth nut, which is spaced below the second nut. The first guide sleeve is fixedly connected to the seventh nut and the eighth nut in the front-back direction, respectively.

2. The drilling device for deep foundation pits in building construction according to claim 1, characterized in that, A filter screen is fixedly connected to the side wall of the first chassis near the first drive device, and the filter screen is provided with heat dissipation holes.

3. The drilling device for deep foundation pits in building construction according to claim 1, characterized in that, A first guide rod and a second guide rod are fixedly installed on the rear side of the first fixed plate. The first guide rod and the second guide rod are spaced apart from each other on the left and right sides. The left and right sides of the first guide plate are respectively provided with a first guide hole adapted to guide the first guide rod and a second guide hole adapted to guide the second guide rod. A third guide rod and a fourth guide rod are fixedly installed on the front side of the second fixed plate. The third guide rod and the fourth guide rod are spaced apart from each other on the left and right sides. The left and right sides of the second guide plate are respectively provided with a third guide hole adapted to guide the third guide rod and a fourth guide hole adapted to guide the fourth guide rod.

4. The drilling device for deep foundation pits in building construction according to claim 1, characterized in that, The base includes a first base plate and a second base plate, both of which extend in the front-to-back direction and are spaced apart from each other in the left-to-right direction. The front and rear ends of the first base plate are fixed to the ground by long screws, and the front and rear ends of the second base plate are also fixed to the ground by long screws. The first fixing plate is fixed between the first base plate and the second base plate, and the second fixing plate is fixed between the first base plate and the second base plate.

5. The drilling device for deep foundation pits in building construction according to claim 4, characterized in that, Rollers are rotatably mounted on the underside of the first base plate and the second base plate.

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