A kind of boring and grouting pile foundation pit construction equipment and construction method for building basement

Abstract

The present invention relates to the technical field of foundation pit drilling, and specifically proposes a construction equipment and method for bored pile foundation pits of building basements, including: a spiral drill bit and a reinforcement guide mechanism. The present invention cooperates with the spiral drill bit and the support column through the reinforcement guide mechanism, so as to provide support force for the middle part of the drill rod during the lifting and lowering movement of the spiral drill bit for drilling holes, thereby improving the stability of the spiral drill bit during rotation and downward movement, avoiding the spiral drill bit from tilting or deflecting due to centrifugal force during rotation, improving the quality of the spiral drill bit drilling, and automatically cleaning and guiding the soil on the spiral blades through the mud cleaning and discharge group when the spiral drill bit drives the soil to move upward, avoiding the problem of low efficiency and incomplete cleaning when manually cleaning the soil on the spiral blades in the traditional way, thereby realizing the integrated function of supporting and guiding the spiral drill bit during the working process and cleaning the soil on the spiral drill bit.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit drilling, and specifically provides a construction device and a construction method for a foundation pit of bored cast-in-place piles in a building basement. Background Art

[0002] Bored cast-in-place piles are a commonly used foundation pit reinforcement technology in construction. The pile body is formed by drilling holes, placing steel cages, pouring concrete and other steps. It is particularly suitable for the construction of building basement foundation pits. Vertical supports are set around the foundation pit by bored cast-in-place piles to provide sufficient supporting force for the foundation pit, which can effectively prevent slope collapse and ensure the stability of the foundation pit.

[0003] The existing bored pile foundation pit construction equipment drills the foundation pit by rotating the auger rod while moving downward. However, since the bored piles in the foundation pit require a deeper depth, the auger rod for drilling the hole needs to be longer. During the drilling construction process, the auger rod with a longer length is prone to swing and tilt under the action of centrifugal rotation force, which reduces the quality of the drilled hole, brings inconvenience to subsequent construction and reduces the quality of vertical support, while extending the construction period and reducing construction efficiency. After the auger rod has finished drilling, it needs to be moved upward and the soil in the hole needs to be taken out. The soil on the auger rod is usually cleaned manually, and the cleaning efficiency and convenience are low. Summary of the invention

[0004] In view of the above problems, the embodiment of the present application provides a bored cast-in-place pile foundation pit construction equipment and a construction method for a building basement to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solutions: a kind of bored cast-in-place pile foundation pit construction equipment for a building basement, comprising: a support column, the side wall of the support column is connected to a movable seat that slides up and down, a spiral drill bit is rotatably connected to the movable seat, the spiral drill bit is composed of a drill rod and a spiral blade fixedly mounted thereon, a driving source group for driving the spiral drill bit to rotate and move up and down is arranged on the movable seat, a guide groove that is slidably connected to the movable seat is opened on the side wall of the support column, and a reinforcement guide mechanism for rotating and reinforcing the spiral drill bit is arranged in the guide groove.

[0006] The reinforcement guide mechanism includes a limiting groove opened on the guide groove, which passes through both sides of the support column in the width direction and extends downward, and two lifting guide blocks arranged up and down are slidably connected in the limiting groove, and the side wall of the lifting guide block is installed with a fixed cylinder mounted on the spiral drill bit, and the inner wall of the fixed cylinder is installed with a support guide group, the support guide group is connected to the side wall of the drill rod for rotation and up and down sliding, and a mud cleaning and discharge group is installed between the lower end of the fixed cylinder located on the lower side and the support guide group connected thereto, and the mud cleaning and discharge group is used for cleaning and guiding the mud on the spiral blade when the spiral drill bit brings out the mud after drilling, and a telescopic connection group is arranged between the two lifting guide blocks and the moving seat.

[0007] In one possible implementation, an arc-shaped semi-ring is installed on the side wall of the fixed cylinder away from the movable seat, and reinforcing ribs are installed on both ends of the arc-shaped semi-ring. Guide grooves that penetrate the guide groove and the limit groove are opened on both sides of the support column arranged along its length direction, and the end of the reinforcing rib away from the arc-shaped semi-ring penetrates the guide groove and the limit groove and is connected to the corresponding lifting guide block.

[0008] In one possible implementation, the support guide group includes a spiral support plate, which is fixedly connected in a fixed tube, the spiral support plate and the spiral blades are arranged alternately, and the spiral support plate is installed with evenly arranged balls near the side wall of the drill rod, and the spiral support plate contacts the side wall of the drill rod through the balls.

[0009] In one possible implementation, the cleaning and mud discharge group includes scraper blade 1 and scraper blade 2 installed on the spiral support plate located on the lower side, scraper blade 1 and scraper blade 2 are arranged along the spiral line of the spiral support plate, scraper blade 1 is connected to the lower end of the spiral support plate and extends upward to the lower spiral surface of the spiral segment adjacent to it in the spiral blade, scraper blade 2 is connected to the middle of the lower spiral surface of the spiral support plate and extends downward to the upper spiral surface of the spiral segment adjacent to it in the spiral blade, the side walls of scraper blade 1 and scraper blade 2 are both installed with cutting components for cutting mud, and the lower end of the fixed cylinder located on the lower side is installed with a mud discharge guide component for guiding the discharge of the cleaned mud and a support and stabilization component.

[0010] In one possible implementation, the mud discharge guide assembly includes a support cylinder, which is sleeved on the spiral drill bit and the inner wall of the support cylinder is close to the spiral side surface of the spiral blade, the outer wall of the upper end of the support cylinder is a conical structure with a diameter gradually increasing downward, and a conical cover with a diameter gradually increasing downward is installed at the lower end of the fixed cylinder located on the lower side, and partition guide blocks evenly arranged along the circumference of the conical cover are installed between the inner wall of the conical cover and the outer wall of the upper end of the support cylinder, and the upper ends of the partition guide blocks are arc-shaped.

[0011] In a possible implementation, the support and stabilization assembly includes a support ring plate installed at the lower end of the support tube, and a plurality of plug rods evenly arranged along the circumference of the support ring plate are installed at the bottom of the support ring plate.

[0012] In a possible implementation, the lower end of the insertion rod is in a conical structure with a diameter that gradually decreases downward.

[0013] In a possible implementation, the cutting assembly includes cutting plates that are evenly arranged from top to bottom and are inclined, the cutting plates are connected to the corresponding scraper blade 1 or scraper blade 2, and the length direction of the cutting plates is consistent with the diameter direction of the spiral blade.

[0014] In one possible implementation, the telescopic connection group includes a hydraulic cylinder 1 installed on a movable seat and located in a guide groove, the telescopic end of the hydraulic cylinder 1 is connected to a lifting guide block on the upper side, the lifting guide block on the upper side passes through a limiting groove and is installed with a hydraulic cylinder 2 on the side away from the spiral drill bit, the lifting guide block on the lower side passes through the limiting groove and is installed with an L-shaped plate, the telescopic end of the hydraulic cylinder 2 is connected to the horizontal section of the L-shaped plate to facilitate the support of the stabilization component against the soil of the foundation pit, and when the lifting guide block on the upper side moves downward and the hydraulic cylinder 2 contracts, the lifting guide block on the upper side approaches the lifting guide block on the lower side.

[0015] The present invention also provides a method for constructing a bored cast-in-place pile foundation pit for a building basement, comprising the following steps: S1. Drilling guide support: in the process of the moving seat driving the spiral drill bit to move downward and driving the spiral drill bit to rotate and drill, the moving seat drives the upper and lower lifting guide blocks to move downward through the telescopic connection group, and the support guide groups in the two fixed cylinders move downward synchronously with the spiral drill bit and support the drill rod of the spiral drill bit.

[0016] S2. Contraction support: After the lifting guide block on the lower side contacts the bottom of the limit groove, the telescopic connection group begins to contract, so that the distance between the moving seat and the two lifting guide blocks is gradually shortened, and the spiral drill bit moves downward to perform drilling work until the downward drilling work is completed.

[0017] S3. Move upward to remove mud: When the spiral drill bit is taken out after drilling a hole, the spiral drill bit continues to rotate. At this time, the moving seat drives the spiral drill bit to move upward, while the fixed cylinder located on the lower side does not move. The mud cleaning and discharge group cleans, scrapes and discharges the mud taken out by the spiral blades when the spiral drill bit moves upward and rotates.

[0018] S4. Complete the drilling reset: After the mud cleaning and removal group has cleaned the mud on the spiral blade, the telescopic connection group drives the lifting guide block located on the lower side to move upward to the initial position.

[0019] S5. Cast-in-place piles: Use existing equipment to place a steel cage in the hole and pour concrete to form a pile body.

[0020] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. A kind of bored cast-in-place pile foundation pit construction equipment for a building basement designed by the present invention cooperates with the spiral drill bit and the support column through a reinforced guide mechanism, so as to provide support force for the middle part of the drill rod during the lifting and lowering movement of the spiral drill bit for drilling holes, thereby improving the stability of the spiral drill bit during rotation and downward movement, avoiding the spiral drill bit from tilting or shifting due to centrifugal force during rotation, thereby improving the quality of the drill hole, shortening the construction period of the drill hole, and automatically cleaning and guiding the mud on the spiral blades through the mud cleaning and discharge group when the spiral drill bit drives the mud to move upward, thereby realizing the integrated function of supporting and guiding the spiral drill bit during work and cleaning the mud on the spiral drill bit, thereby improving the efficiency and convenience of foundation pit drilling.

[0021] 2. When cleaning the mud on the spiral blades, the scraper blades 1 and 2 in the mud cleaning and discharge group cooperate with the supporting stabilizing component and the cutting component to alternately cut and clean the mud on the spiral blades, which can not only effectively clean the mud on the spiral blades, but also avoid the problem of large thrust when cleaning and scraping the mud, causing the mud and the mud cleaning and discharge group to be stuck.

[0022] 3. When the cleaned mud scraped from the spiral blades by the cleaning and mud discharge group in the present invention falls onto the support tube, the mud falls directly downward along the conical outer wall of the support tube, and the mud is discharged from between two adjacent partition guide blocks, thereby preventing the cleaned mud from re-entering the hole and requiring secondary cleaning, thereby reducing the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the foundation pit construction equipment of the present invention.

[0025] Figure 2 It is a schematic diagram of the partial three-dimensional structure of the mud cleaning and discharge group of the present invention.

[0026] Figure 3 It is a first structural schematic diagram of the spiral drill bit, the spiral support plate, the scraper blade 1 and the scraper blade 2 of the present invention.

[0027] Figure 4 It is a second structural schematic diagram of the spiral drill bit, the spiral support plate, the scraper blade 1 and the scraper blade 2 of the present invention.

[0028] Figure 5 The present invention Figure 1 Top view of the .

[0029] Figure 6 The present invention Figure 5 AA section view.

[0030] Figure 7 The present invention Figure 6 Enlarged view of point B in .

[0031] : 1. Support column; 2. Moving seat; 3. Spiral drill bit; 30. Drill rod; 31. Spiral blade; 4. Guide groove; 5. Reinforcement guide mechanism; 50. Limit groove; 51. Lifting guide block; 52. Fixed cylinder; 520. Arc semi-ring; 521. Reinforcement rib; 522. Guide slide groove; 53. Support guide group; 530. Spiral support plate; 54. Cleaning and mud discharge group; 540. Scraper one; 541. Scraper two; 542. Cutting assembly; 560. Support cylinder; 561. Conical cover; 562. Partition guide block; 570. Support ring plate; 571. Insert rod; 55. Telescopic connection group; 550. Hydraulic cylinder one; 551. Hydraulic cylinder two; 552. L-shaped plate. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] See also Figure 1 A construction equipment for bored pile foundation pit of a building basement comprises: a support column 1, a movable seat 2 which slides up and down is connected to the side wall of the support column 1, a spiral drill bit 3 is rotatably connected to the movable seat 2, the spiral drill bit 3 is composed of a drill rod 30 and a spiral blade 31 which is fixedly mounted thereon, a driving source group for driving the spiral drill bit 3 to rotate and move up and down is arranged on the movable seat 2, a guide groove 4 which is slidably connected to the movable seat 2 is opened on the side wall of the support column 1, and a reinforcement guide mechanism 5 for rotating and reinforcing the spiral drill bit 3 is arranged in the guide groove 4.

[0035] See also Figure 1The reinforcement guide mechanism 5 includes a limiting groove 50 opened on the guide groove 4, which runs through both sides of the support column 1 in the width direction and extends downward. Two lifting guide blocks 51 arranged up and down are slidably connected in the limiting groove 50. The side wall of the lifting guide block 51 is installed with a fixed cylinder 52 sleeved on the spiral drill bit 3. The inner wall of the fixed cylinder 52 is installed with a support guide group 53. The support guide group 53 is connected to the side wall of the drill rod 30 for rotation and up and down sliding. A mud cleaning and discharge group 54 is installed between the lower end of the fixed cylinder 52 located on the lower side and the support guide group 53 connected thereto. The mud cleaning and discharge group 54 is used to clean and guide the mud on the spiral blade 31 when the spiral drill bit 3 brings out the mud after drilling. A telescopic connection group 55 is arranged between the two lifting guide blocks 51 and the moving seat 2.

[0036] The support column 1 is connected to the mobile equipment of the existing foundation pit reinforcement drilling machine, and the driving source group is the existing lifting equipment (such as an electric slider) connected to the moving seat 2 and the motor installed on the moving seat 2 to drive the spiral drill bit 3 to rotate.

[0037] When the movable seat 2 drives the spiral drill bit 3 to move downward and drives the spiral drill bit 3 to rotate and drill holes, the telescopic connection group 55 drives the upper and lower lifting guide blocks 51 to move downward, so that the support guide groups 53 in the two fixed tubes 52 move downward synchronously with the spiral drill bit 3, and support the drill rod 30 of the spiral drill bit 3, and provide support force for the middle part of the drill rod 30, thereby improving the stability of the spiral drill bit 3 during rotation and downward movement, avoiding the spiral drill bit 3 from tilting or deflecting due to centrifugal force during rotation, thereby improving the quality of drilling by the spiral drill bit 3, and in the process of the two lifting guide blocks 51 moving downward, after the lifting guide block 51 located on the lower side contacts the bottom of the limit groove 50, the telescopic connection group 55 begins to shrink, so that the distance between the movable seat 2 and the two lifting guide blocks 51 is gradually shortened, so that the spiral drill bit 3 continues to move downward to perform drilling work.

[0038] When the auger bit 3 is taken out after drilling, the auger bit 3 continues to rotate so as to remove the soil squeezed on the spiral blade 31 during drilling. At this time, the moving seat 2 drives the auger bit 3 to move upward, and the telescopic connection group 55 works so that there is a certain distance between the moving seat 2 and the lifting guide block 51 on the upper side, so that the support guide group 53 in the fixed cylinder 52 on the upper side can still guide and support the auger bit 3 during the upward movement of the auger bit 3, while the fixed cylinder 52 on the lower side does not move at this time, and the spiral blade 3 is cleaned by the mud removal group 54. The soil taken out by the spiral blade 31 is cleaned, scraped and discharged. There is no need to perform secondary cleaning of the soil on the spiral blade 31 after the spiral blade 31 is taken out, and there is no need to clean the soil that falls into the foundation hole when the spiral blade 31 is taken out. The cleaning and discharging mud group 54 finishes cleaning the soil on the spiral blade 31, and then the telescopic connection group 55 drives the lifting guide block 51 located at the lower side to move upward to the initial position, thereby realizing the support and guidance of the spiral drill bit 3 and the cleaning of the soil on the spiral drill bit 3 in an integrated manner, thereby improving the efficiency and convenience of foundation pit drilling.

[0039] See also Figure 1 An arcuate semi-ring 520 is installed on the side wall of the fixed cylinder 52 away from the movable seat 2, and reinforcing ribs 521 are installed at both ends of the arcuate semi-ring 520. Both sides of the support column 1 arranged along its length direction are provided with guide grooves 522 that penetrate the guide groove 4 and the limit groove 50. The end of the reinforcing rib 521 away from the arcuate semi-ring 520 penetrates the guide groove 4 and the limit groove 50 and is connected to the corresponding lifting guide block 51, thereby further improving the stability of the fixed cylinder 52 and the support guide group 53 thereon in supporting the spiral drill bit 3.

[0040] See also Figure 1 , Figure 3 and Figure 7 The support guide group 53 includes a spiral support plate 530, which is fixedly connected to the fixed tube 52. The spiral support plate 530 and the spiral blades 31 are arranged alternately. The spiral support plate 530 is installed with evenly arranged balls near the side wall of the drill rod 30, and the spiral support plate 530 contacts the side wall of the drill rod 30 through the balls.

[0041] The fixed tube 52 wraps around the drill rod 30 via the spiral support plate 530 to support the spiral drill bit 3. The spiral support plate 530 rolls with the side wall of the drill rod 30 via the ball bearing, so that the drill rod 30 can rotate along the spiral support plate 530 close to the end face of the drill rod 30, and can also move up and down along the spiral support plate 530, thereby supporting the middle part of the spiral drill bit 3 to prevent deviation during drilling without affecting the operation of the spiral drill bit 3.

[0042] See also Figure 1 , Figure 3 , Figure 4and Figure 7 The cleaning and mud discharge group 54 includes a scraper blade 1 540 and a scraper blade 2 541 installed on the spiral support sheet 530 located on the lower side. The scraper blade 1 540 and the scraper blade 2 541 are arranged along the spiral line of the spiral support sheet 530. The scraper blade 1 540 is connected to the lower end of the spiral support sheet 530 and extends upward to the lower spiral surface of the spiral segment adjacent to it in the spiral blade 31. The scraper blade 2 541 is connected to the middle part of the lower spiral surface of the spiral support sheet 530 and extends downward to the upper spiral surface of the spiral segment adjacent to it in the spiral blade 31. The side walls of the scraper blade 1 540 and the scraper blade 2 541 are both installed with a cutting component 542 for cutting the mud. The lower end of the fixed cylinder 52 located on the lower side is installed with a mud discharge guide component for discharging the cleaned mud and a support and stabilization component.

[0043] See also Figure 1 , Figure 2 and Figure 7 The mud discharge guide assembly includes a support tube 560, which is sleeved on the spiral drill bit 3 and the inner wall of the support tube 560 is close to the spiral side surface of the spiral blade 31. The outer wall of the upper end of the support tube 560 is a conical structure with a diameter gradually increasing downward. The lower end of the fixed tube 52 located on the lower side is provided with a conical cover 561 with a diameter gradually increasing downward. Between the inner wall of the conical cover 561 and the outer wall of the upper end of the support tube 560, there are partition guide blocks 562 evenly arranged along the circumference of the conical cover 561. When the mud scraped off from the spiral blade 31 by the cleaning and discharge group 54 falls on the support tube 560, it falls directly downward along the conical outer wall of the support tube 560, and the mud is discharged from between two adjacent partition guide blocks 562 to prevent the cleaned mud from entering the hole again. The upper end of the partition guide block 562 is in an arc shape, so that the cleaned mud can slide down and be discharged along the top of the partition guide block 562.

[0044] During the rotation and upward movement of the spiral drill bit 3, the spiral blade 31 drives the soil to rotate in a spiral and move upward, and the soil enters the support tube 560, and a spiral channel is formed between the drill rod 30, the spiral blade 31 and the support tube 560. When the spiral drill bit 3 continues to drive the soil to move upward, the scraper blade 1 540 and the cutting group thereon collide with the soil on the spiral blade 31 in the spiral channel where the scraper blade 1 540 is located at this time, thereby cutting and scraping the soil on the upper side of the spiral channel. Afterwards, the scraper blade 2 541 and the cutting assembly 542 connected thereto cut and scrape the soil on the lower side of the spiral channel. The scraper blade 1 540 and the scraper blade 2 541 scrape and clean the soil in the spiral channel in sections, reducing the resistance of the scraper blade 1 540 and the scraper blade 2 541 when clearing and scraping the soil, and can also fully clean and scrape the soil on the spiral blade 31, avoiding the problems of low efficiency and incomplete cleaning in the traditional manual cleaning method.

[0045] See also Figure 2 and Figure 6 The support and stabilization component includes a support ring plate 570 installed at the lower end of the support cylinder 560. A plurality of plug rods 571 evenly arranged along its circumference are installed at the bottom of the support ring plate 570. When the fixed cylinder 52 and the support cylinder 560 located at the lower side move downward, the support ring plate 570 is driven to move downward. The plug rods 571 at the bottom of the support ring plate 570 are inserted into the soil of the foundation pit, thereby supporting the fixed cylinder 52 located at the lower side and the bottom of the support cylinder 560, improving the stability of the fixed cylinder 52 located at the lower side, and preventing the scraper blade 1 540 and the scraper blade 2 541 on the spiral support sheet 530 located at the lower side from cleaning and scraping the soil on the spiral blade 31. The interaction force between the scraper blade 1 540 and the scraper blade 2 541 and the soil is large, causing the fixed cylinder 52 located at the lower side to shake.

[0046] See also Figure 7 The lower end of the insertion rod 571 is in a conical structure with a diameter that gradually decreases downward, so that the insertion rod 571 can be easily inserted into the soil of the foundation pit.

[0047] See also Figure 7 The cutting assembly 542 includes cutting plates that are evenly arranged from top to bottom and are inclined. The cutting plates are connected to the corresponding scraper blade 1 540 or scraper blade 2 541, and the length direction of the cutting plates is consistent with the diameter direction of the spiral blade 31, so that when the soil rotates with the spiral blade 31 and moves toward the scraper blade 1 540 and the scraper blade 2 541, the cutting plates are inserted into the soil to cut the soil, thereby preventing the soil from agglomerating under the squeezing action of the rotating force of the spiral blade 31, making it difficult for the scraper blade 1 540 and the scraper blade 2 541 to scrape off the soil, thereby improving the convenience and efficiency of soil cleaning.

[0048] See also Figure 1 , Figure 5 and Figure 6 The telescopic connection group 55 includes a hydraulic cylinder 1 550 installed on the moving seat 2 and located in the guide groove 4. The telescopic end of the hydraulic cylinder 1 550 is connected to the lifting guide block 51 on the upper side. The lifting guide block 51 on the upper side passes through the limiting groove 50 and is installed with a hydraulic cylinder 2 551 on the side away from the spiral drill bit 3. The lifting guide block 51 on the lower side passes through the limiting groove 50 and is installed with an L-shaped plate 552. The telescopic end of the hydraulic cylinder 2 551 is connected to the horizontal section of the L-shaped plate 552 to facilitate the support of the stabilization component to resist the soil of the foundation pit. When the lifting guide block 51 on the upper side moves downward and the hydraulic cylinder 2 551 contracts, the lifting guide block 51 on the upper side approaches the lifting guide block 51 on the lower side.

[0049] When the movable seat 2 drives the spiral drill bit 3 to move downward, the hydraulic cylinder 1 550 and the hydraulic cylinder 2 551 respectively push the upper and lower lifting guide blocks 51 to move downward, so that the support guide group 53 in the upper and lower fixed cylinders 52 always supports and guides the spiral drill bit 3, avoiding lateral deviation of the spiral drill bit 3 due to centrifugal force during rotation, thereby making the spiral drill bit 3 maintain linearity during the rotation process, improving the accuracy and quality of foundation pit drilling, when the support stabilization component at the lower end of the fixed cylinder 52 on the lower side is tightly against the foundation pit, the fixed cylinder 52 on the lower side no longer moves downward, and the hydraulic cylinder 2 551 begins to shrink until the two lifting guide blocks 51 are close together, and then the movable seat 2 continues to move downward, and the hydraulic cylinder 1 550 begins to shrink, so that the support guide group 53 always supports the spiral drill bit 3 during the process of the spiral drill bit 3 rotating and moving downward to drill.

[0050] When the foundation pit drilling is completed, when the movable seat 2 drives the auger bit 3 to move upward, the hydraulic cylinder 1 550 is extended first, and then the hydraulic cylinder 2 551 is extended, so that there is a certain distance between the fixed cylinder 52 on the upper side and the movable seat 2, so that the support guide group 53 in the fixed cylinder 52 on the upper side can still guide and support the auger bit 3 in the upward process of the auger bit 3, and the fixed cylinder 52 on the lower side does not move at this time, and the mud cleaning and discharge group 54 is used to clean and scrape the mud removed by the spiral blade 31 when the auger bit 3 moves upward and rotates, thereby realizing the integration of foundation pit drilling and mud discharge.

[0051] See also Figure 1 The present invention also provides a method for constructing a bored pile foundation pit for a building basement, comprising the following steps: S1. Drilling guide support: In the process of the moving seat 2 driving the spiral drill bit 3 to move downward and driving the spiral drill bit 3 to rotate and drill, the moving seat 2 drives the upper and lower lifting guide blocks 51 to move downward through the telescopic connection group 55, and the support guide groups 53 in the two fixed cylinders 52 move downward synchronously with the spiral drill bit 3 and support the drill rod 30 of the spiral drill bit 3.

[0052] S2. Contraction support: After the lifting guide block 51 located at the lower side contacts the bottom of the limiting groove 50, the telescopic connection group 55 begins to contract, so that the distance between the moving seat 2 and the two lifting guide blocks 51 is gradually shortened, and the spiral drill bit 3 moves downward to perform drilling work until the downward drilling work is completed.

[0053] S3. Move upward to remove mud: When the spiral drill bit 3 is taken out after drilling a hole, the spiral drill bit 3 continues to rotate. At this time, the movable seat 2 drives the spiral drill bit 3 to move upward, while the fixed cylinder 52 located on the lower side does not move. The mud cleaning and discharge group 54 cleans, scrapes and discharges the mud taken out by the spiral blades 31 when the spiral drill bit 3 moves upward and rotates.

[0054] S4. Drilling resetting completed: After the mud cleaning and removal group 54 has cleaned the mud on the spiral blade 31, the telescopic connection group 55 drives the lifting guide block 51 located at the lower side to move upward to the initial position.

[0055] S5. Cast-in-place piles: Use existing equipment to place a steel cage in the hole and pour concrete to form a pile body.

[0056] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A kind of bored pile foundation pit construction equipment for building basement, It is characterized in that include: A support column (1), the side wall of the support column (1) is connected to a movable seat (2) that slides up and down, the movable seat (2) is rotatably connected to a spiral drill bit (3), the spiral drill bit (3) is composed of a drill rod (30) and a spiral blade (31) fixedly sleeved thereon, the movable seat (2) is provided with a driving source group that drives the spiral drill bit (3) to rotate and move up and down, the side wall of the support column (1) is provided with a guide groove (4) that is slidably connected to the movable seat (2), and a reinforcement guide mechanism (5) is provided in the guide groove (4) for rotationally reinforcing the spiral drill bit (3); The reinforcement guide mechanism (5) comprises a limiting groove (50) provided on the guide groove (4) and penetrating through both sides of the support column (1) in the width direction and extending downwards, two lifting guide blocks (51) arranged up and down are slidably connected in the limiting groove (50), a fixed cylinder (52) sleeved on the spiral drill bit (3) is installed on the side wall of the lifting guide block (51), and a support guide group (53) is installed on the inner wall of the fixed cylinder (52), and the support guide group (53) comprises a spiral support sheet (530), the spiral support sheet (530) is fixedly connected in the fixed cylinder (52), the spiral support sheet (530) and the spiral blade (31) are arranged in an alternating manner, and the spiral support sheet (530) is installed with evenly arranged balls near the side wall of the drill rod (30), and the spiral support sheet (530) contacts the side wall of the drill rod (30) through the balls; A mud cleaning and discharge group (54) is provided at the lower end of the fixed cylinder (52) located at the lower side. The mud cleaning and discharge group (54) is used to clean and guide the mud on the spiral blade (31) when the spiral drill bit (3) brings out the mud after drilling. A telescopic connection group (55) is provided between the two lifting guide blocks (51) and the movable seat (2); The cleaning and mud removal group (54) comprises a scraper blade 1 (540) and a scraper blade 2 (541) installed on the spiral support plate (530) located at the lower side, and the scraper blade 1 (540) and the scraper blade 2 (541) are arranged along the spiral line of the spiral support plate (530); The telescopic connection group (55) comprises a hydraulic cylinder 1 (550) installed on the moving seat (2) and located in the guide groove (4); the telescopic end of the hydraulic cylinder 1 (550) is connected to the lifting guide block (51) located on the upper side; the lifting guide block (51) located on the upper side passes through the limiting groove (50) and is installed on the side away from the spiral drill bit (3); the lifting guide block (51) located on the lower side passes through the limiting groove (50) and is installed with an L-shaped plate (552); the telescopic end of the hydraulic cylinder 2 (551) is connected to the horizontal section of the L-shaped plate (552); when the hydraulic cylinder 2 (551) contracts, the lifting guide block (51) located on the upper side is close to the lifting guide block (51) located on the lower side.

2. According to claim 1, a bored pile foundation pit construction equipment for a building basement, Features: The scraper blade 1 (540) is connected to the lower end of the spiral support plate (530) and extends upward to approach the lower spiral surface of the spiral segment adjacent to it in the spiral blade (31). The scraper blade 2 (541) is connected to the middle of the lower spiral surface of the spiral support plate (530) and extends downward to approach the upper spiral surface of the spiral segment adjacent to it in the spiral blade (31). The side walls of the scraper blade 1 (540) and the scraper blade 2 (541) are both equipped with a cutting component (542) for cutting soil. The lower end of the fixed cylinder (52) located at the lower side is equipped with a mud discharge guide component for discharging and guiding the cleaned mud, as well as a support and stabilization component.

3. According to claim 2, a construction equipment for bored pile foundation pit of a building basement, Features: The mud discharge guide assembly comprises a support tube (560), the support tube (560) is sleeved on the spiral drill bit (3) and the inner wall of the support tube (560) is close to the spiral side surface of the spiral blade (31), the outer wall of the upper end of the support tube (560) is in a conical structure with a diameter gradually increasing downward, and a conical cover (561) with a diameter gradually increasing downward is installed at the lower end of the fixed tube (52) located at the lower side, and partition guide blocks (562) are evenly arranged along the circumference of the conical cover (561) between the inner wall of the conical cover (561) and the outer wall of the upper end of the support tube (560), and the upper ends of the partition guide blocks (562) are in an arc shape.

4. According to claim 1, a bored pile foundation pit construction equipment for a building basement, Features: An arcuate semi-ring (520) is installed on the side wall of the fixed cylinder (52) away from the movable seat (2), and reinforcing ribs (521) are installed on both ends of the arcuate semi-ring (520). Both sides of the support column (1) arranged along its length direction are provided with guide grooves (522) penetrating the guide groove (4) and the limit groove (50), and one end of the reinforcing rib (521) away from the arcuate semi-ring (520) penetrates the guide groove (4) and the limit groove (50) and is connected to the corresponding lifting guide block (51).

5. According to claim 3, a bored pile foundation pit construction equipment for a building basement, Features: The support and stabilization assembly comprises a support ring plate (570) installed at the lower end of the support tube (560), and a plurality of insertion rods (571) evenly arranged along the circumference of the support ring plate (570) are installed at the bottom thereof.

6. According to claim 2, a bored pile foundation pit construction equipment for a building basement, Features: The cutting assembly (542) comprises cutting plates that are evenly arranged from top to bottom and are inclined, the cutting plates being connected to the corresponding scraper blade 1 (540) or scraper blade 2 (541), and the length direction of the cutting plates is consistent with the diameter direction of the spiral blade (31).

7. According to claim 5, a bored pile foundation pit construction equipment for a building basement, Features: The lower end of the insertion rod (571) is in a conical structure with a diameter that gradually decreases downward.

8. A method for constructing a bored pile foundation pit for a building basement, using the bored pile foundation pit construction equipment for a building basement as claimed in claim 1. It is characterized in that The following steps are involved: S1. Drilling guide support: When the movable seat (2) drives the spiral drill bit (3) to move downward and drives the spiral drill bit (3) to rotate and drill, the movable seat (2) drives the upper and lower lifting guide blocks (51) to move downward through the telescopic connection group (55), and the support guide groups (53) in the two fixed cylinders (52) move downward synchronously with the spiral drill bit (3) and support the drill rod (30) of the spiral drill bit (3); S2. Contraction support: After the lifting guide block (51) located at the lower side contacts the bottom of the limit groove (50), the telescopic connection group (55) begins to contract, so that the distance between the movable seat (2) and the two lifting guide blocks (51) is gradually shortened, and the spiral drill bit (3) moves downward to perform drilling work until the downward drilling work is completed; S3. Move upward to remove mud: When the spiral drill bit (3) is removed after drilling a hole, the spiral drill bit (3) continues to rotate, and the movable seat (2) drives the spiral drill bit (3) to move upward, while the fixed cylinder (52) located at the lower side does not move. The mud cleaning and discharging group (54) cleans, scrapes and discharges the mud removed by the spiral blade (31) when the spiral drill bit (3) moves upward and rotates; S4. Drilling reset is completed: After the mud cleaning group (54) cleans the mud on the spiral blade (31), the telescopic connection group (55) drives the lifting guide block (51) located on the lower side to move upward to the initial position; S5. Cast-in-place piles: Place a steel cage in the hole and pour concrete to form the pile body.

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