A telescopic short spiral drill and spray integrated diaphragm wall construction equipment and construction method

Abstract

The application provides a telescopic short auger jet integrated diaphragm wall construction equipment and a construction method, the equipment comprises a chassis system, an auger rod, a power head, a lifting tower, a telescopic system, a high jet system and a pipeline, and a drill bit is installed at the bottom end of the auger rod; the power head is used for driving the auger rod to rotate; the lifting tower is installed on the chassis system, and the lifting tower is used for driving the power head to move up and down; the telescopic system is arranged on the power head, and the telescopic system comprises a telescopic auger rod; the high jet system is used for providing high-pressure fluid; the pipeline is arranged inside the auger hole, and a connecting hose that is adapted to the extension and contraction of the auger rod relative to the power head is arranged in the middle of the pipeline. The telescopic system can expand or contract the telescopic auger rod, so that the drilling depth of the drill bit can be effectively improved, and the needs of drilling holes with different depths can be met; after the drilling operation is completed, the telescopic system contracts the telescopic auger rod, and then the transfer operation of the construction equipment is facilitated.

Description

Technical Field

[0001] This invention relates to the field of anti-seepage wall construction technology, specifically to a telescopic short spiral drilling and spraying integrated anti-seepage wall construction equipment and construction method. Background Technology

[0002] Cutoff walls are the core protective structures in water conservancy projects that ensure the stability and safety of dikes, dams, and other structures. Their construction quality directly affects the seepage prevention effect and long-term operational safety of the project. With the development of cutoff wall construction technology, the long spiral drilling and grouting integrated technology has been widely used in water conservancy seepage prevention projects due to its advantages such as high drilling efficiency, strong adaptability to geological formations, and reliable wall quality.

[0003] However, existing long spiral drilling and grouting integrated construction equipment has significant limitations: the total length of the spiral drill rod is often 30-40 meters to match the depth of the seepage barrier, and the length of its matching long spiral drill rod is usually over 40 meters, resulting in tall equipment towers, large overall volume, and concentrated weight. In typical water conservancy engineering scenarios such as dike crests where the working surface is narrow and the clearance is limited (e.g., with overhead power lines, communication cables, trees, or steep slopes), ultra-high equipment not only has difficulty operating flexibly in confined spaces, making it difficult to enter and relocate, but also poses a serious risk of overturning and electric shock, posing significant safety hazards. At the same time, the tall equipment needs to be disassembled and transported during relocation, which is inefficient, and its stability is poor under conditions such as strong winds and slopes, further restricting its application in dike crest seepage prevention projects. Moreover, the existing long spiral drilling and spraying equipment has a fixed drill rod structure, which cannot flexibly adjust the length according to the height limit requirements and geological conditions on site. When the design depth D of the anti-seepage wall in the section to be constructed is relatively shallow, the equipment still needs to maintain a tall structure, resulting in energy waste and construction inconvenience. The flexibility and controllability of wall thickness when operating in a narrow space still need to be improved.

[0004] Furthermore, in existing technologies, rotary drilling rigs are generally non-integrated drilling and shotcreting equipment. During construction, the equipment first uses the drill bit to complete the drilling operation, and only after the drill bit is completely withdrawn from the hole does the nozzle extend into the hole to perform shotcreting or concrete pouring. Because the drilling and shotcreting processes cannot be carried out in parallel, the construction efficiency is low and the process connection time is long. Summary of the Invention

[0005] The purpose of this invention is to improve and innovate upon the shortcomings and problems existing in the background technology, and to provide a telescopic short spiral drilling and spraying integrated anti-seepage wall construction equipment and construction method.

[0006] According to a first aspect of the present invention, a telescopic short spiral drilling and spraying integrated seepage prevention wall construction device is provided, comprising: Chassis system; A spiral drill rod, wherein a drill bit is mounted at the bottom end of the spiral drill rod; A power head, used to drive the auger drill pipe to rotate; A lifting tower, which is mounted on a chassis system, is used to drive the power head to move up and down; A telescopic system is provided on the power head. The telescopic system includes a telescopic drill rod and is used to extend and retract the telescopic drill rod to achieve the extension and retraction of the auger drill rod relative to the power head. High-pressure injection system, the high-pressure injection system being used to provide high-pressure fluid; The pipeline is installed inside the auger borehole. A connecting hose is installed in the middle of the pipeline to accommodate the extension and retraction of the auger rod relative to the power head. The upper and lower ends of the pipeline are connected to the high-frequency system and the nozzle respectively through rotary joints. The nozzle is installed on the drill bit.

[0007] A further embodiment is that the telescopic drill rod includes an outer cylinder, which is slidably engaged with an intermediate cylinder, and the intermediate cylinder is slidably engaged with an inner cylinder via a spline. The bottom end of the inner cylinder is integrally formed with the top end of the spiral drill rod. The top wall of the intermediate cylinder is threadedly connected to the outer surface of the threaded rod, and the threaded rod is driven to rotate by a second drive mechanism. The lower surface of the top wall of the intermediate cylinder is provided with a downwardly extending protrusion, and the outer surface of the protrusion is rotatably connected to a threaded sleeve via a bearing. The threaded sleeve is slidably engaged with the outer surface of the threaded rod via a spline, and the outer surface of the threaded sleeve is threadedly connected to the top wall of the inner cylinder.

[0008] A further embodiment is that the power head includes a movable frame, the upper end of the outer cylinder is rotatably connected to the movable frame, and a first driving mechanism is provided on the movable frame, the first driving mechanism being used to drive the outer cylinder to rotate.

[0009] A further embodiment is that the second drive mechanism includes a first bevel gear and a second bevel gear that are in transmission engagement. The first bevel gear is mounted on the outer surface of the upper end of the threaded rod, and the second bevel gear is mounted on a rotating shaft, which is rotatably connected to the outer cylinder. A second rotary motor is fixedly connected to the telescopic end of a hydraulic cylinder mounted on the movable frame. A fixed sleeve is fixedly connected to the output end of the second rotary motor, and the inner surface of the fixed sleeve is used for key connection with the outer surface of the rotating shaft.

[0010] A further option is to install a support plate inside the outer cylinder, and the support plate is rotatably engaged with the upper end of the threaded rod via a bearing.

[0011] A further embodiment is that a first rotary joint is installed inside the inner cylinder via a support plate, and the first rotary joint is connected to the nozzle on the drill bit via a connecting pipe.

[0012] According to a second aspect of the present invention, a drilling-spraying integrated seepage barrier construction method based on any of the above-described devices is provided, comprising the following steps: S1: Drill pipe selection and configuration: based on the design depth D of the anti-seepage wall and the on-site height restriction H. lim Based on the geological conditions of the strata, determine the length configuration of the auger drill pipe and the telescopic drill pipe to ensure that D ≤ L. max And H lim ≥ L min + Δh; where L max L represents the length of the drill pipe after it has been extended. min The length of the drill rod after the telescopic drill rod is retracted, and Δh is the spare height required for the installation of the power head and the drill bit. S2: Equipment relocation and obstacle avoidance: The telescopic drill rod is fully retracted to the retracted state through the telescopic system to complete the obstacle avoidance and relocation. S3: Segmented Drilling: Drive the auger rod to rotate and drive the power head to move down along the lifting tower so that the drill bit can drill downwards; during the drilling process, the auger rod's spiral blades continuously remove soil; if soil removal is obstructed during drilling, causing drilling difficulties, the power head drives the auger rod to reverse at low speed to loosen the drill cuttings; when the power head moves to the bottom of the lifting tower, drive the power head in the opposite direction to move up along the lifting tower to its top; unfold the telescopic drill rod to the extended state, continue to drive the auger rod to rotate, and drive the power head to move down along the lifting tower; S4: Complete drilling operations for adjacent holes: After the single hole is completed, retract the telescopic drill rod to the retracted state, lift the drill bit, and move the equipment to the next hole using the chassis system; S5: High-pressure jetting wall formation on the same side: After the next hole is drilled to the designed depth, the nozzle on the drill bit is oriented towards the previous drilling direction, the high-pressure jetting system is started, and high-pressure cement slurry is sprayed from the nozzle. At the same time, the drill bit is raised at a preset lifting speed to cut the soil between the current hole and the previous hole, so that the current hole and the previous hole are connected. The cut soil and the sprayed cement slurry are solidified together to form part of the anti-seepage wall. S6: Cyclic Overlap Construction: After the construction of a single hole is completed, repeat steps S3-S5 to achieve continuous overlap of the wall at adjacent hole positions by spraying on the same side. S7: Retraction and Transfer: After the construction of a single section of the dike seepage prevention wall is completed, the telescopic drill rod is fully retracted and the equipment is transferred to the next section.

[0013] A further approach is that, in step S3, when drilling into hard strata or strata containing large pebbles, the telescopic system retracts all the telescopic drill rods and drives the auger drill rod to rotate in the opposite direction.

[0014] A further approach is that, in step S3, when the design depth D of the anti-seepage wall for the required construction section is less than or equal to the total length L of the contracted state... minAt this time, the full spiral drilling mode can be directly adopted without the need to unfold the telescopic drill rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention can expand or retract the telescopic drill rod through the telescopic system, thereby effectively increasing the drilling depth of the drill bit and meeting the needs of drilling at different depths; after the drilling operation is completed, the telescopic system retracts the telescopic drill rod, which facilitates the relocation of construction equipment. (2) The present invention achieves multi-stage expansion and contraction of the inner cylinder relative to the outer cylinder, the middle cylinder, the threaded sleeve, the inner cylinder and the threaded rod through the mutual cooperation of the outer cylinder, the threaded sleeve and the inner cylinder synchronously expanding and contracting relative to the outer cylinder when the threaded rod is driven, and the inner cylinder synchronously expanding and contracting relative to the middle cylinder, thereby realizing the expansion and contraction of the inner cylinder relative to the outer cylinder, which is beneficial to increasing the expansion and contraction length of the inner cylinder relative to the outer cylinder, thereby increasing the expansion and contraction length of the drill rod. (3) The present invention enables the high-pressure grouting pipeline to extend and retract synchronously with the extension and retraction of the telescopic drill rod through the cooperation of the pipeline, connecting hose, first rotary joint, second rotary joint, threaded rod and first drive mechanism; in this way, the drill rod can be designed to have a telescopic function, and the high-pressure grouting pipeline can be set inside the drill rod without affecting the high-pressure grouting through the liquid outlet hole on the drill bit; therefore, the construction equipment of the present invention can still achieve integrated drilling and grouting operation, without the need to complete the drilling and hole-forming operation, and after the drill bit is completely withdrawn from the hole, the nozzle is inserted into the hole for grouting or concrete pouring. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural schematic diagram of a telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment provided in an embodiment of the present invention; Figure 2 This is a cross-sectional structural diagram of the power head provided in an embodiment of the present invention.

[0018] Reference numerals: 1. Chassis system; 2. High-pressure jet system; 3. Lifting tower; 4. Drill bit; 5. Spiral drill rod; 6. Power head; 601. Moving frame; 602. First rotary motor; 603. First gear; 604. Second gear; 605. Outer cylinder; 606. Intermediate cylinder; 6061. Protrusion; 607. Inner cylinder; 608. Threaded sleeve; 609. Threaded rod; 610. Pipeline; 611. First rotary joint; 612. Connecting hose; 613. First bevel gear; 614. Second bevel gear; 615. Rotating shaft; 616. Fixed sleeve; 617. Second rotary motor; 618. Hydraulic cylinder; 7. Diverter. Detailed Implementation

[0019] To make the objectives, features, and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example 1 Please see Figures 1-2 This embodiment provides a telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment, including a chassis system 1, a lifting tower 3, a power head 6, a spiral drill rod 5, and a high-pressure spraying system 2; a drill bit 4 is installed at the bottom end of the spiral drill rod 5.

[0022] The chassis system 1 is a tracked or wheeled walking mechanism used to carry and move the entire equipment. The lifting tower 3 is vertically mounted on the chassis system 1. The lifting tower 3 includes guide rails and a lifting drive mechanism, which can be a hydraulic cylinder or a winch; this application does not impose a specific limitation, and those skilled in the art can determine the appropriate mechanism based on the actual situation. The power head 6 is slidably mounted on the guide rails, and the lifting drive mechanism is used to drive the power head 6 to slide up and down along the guide rails.

[0023] Specifically, the power head 6 includes a movable frame 601, which is slidably mounted on a guide rail. A first drive mechanism is located inside the movable frame 601. The first drive mechanism specifically includes a first rotary motor 602, a first gear 603, and a second gear 604. The power head 6 is also equipped with a telescopic system, which includes a telescopic drill rod and is used to extend and retract the drill rod. Figure 2As shown, the telescopic drill rod includes an outer cylinder 605, a middle cylinder 606, an inner cylinder 607, a threaded sleeve 608, and a second drive mechanism. The upper end of the outer cylinder 605 is rotatably connected to the movable frame 601 via a bearing. The outer surface of the middle cylinder 606 is in sliding engagement with the inner surface of the outer cylinder 605, and relative rotation between the two is restricted by a key or guide bar, while axial sliding is allowed. The outer surface of the inner cylinder 607 is in sliding engagement with the inner surface of the middle cylinder 606 via a spline, also allowing axial sliding. The bottom end of the inner cylinder 607 is integrally formed or fixedly connected to the top end of the auger drill rod 5.

[0024] To enable the telescoping of the intermediate cylinder 606 relative to the outer cylinder 605 and the telescoping of the inner cylinder 607 relative to the intermediate cylinder 606, a threaded rod 609 is provided at the center of the interior of the intermediate cylinder 606. The threaded rod 609 is driven to rotate by a second drive mechanism. The upper end of the threaded rod 609 is supported by a bearing on a support plate inside the outer cylinder 605. A threaded hole is provided at the center of the top wall of the intermediate cylinder 606, which is threaded to the outer surface of the threaded rod 609. Furthermore, the lower surface of the top wall of the intermediate cylinder 606 is provided with a downwardly extending protrusion 6061. The outer surface of the protrusion 6061 is rotatably connected to the threaded sleeve 608 via a bearing. Moreover, the inner wall of the threaded sleeve 608 is slidably engaged with the outer surface of the threaded rod 609 via a spline. Thus, when the second drive mechanism drives the threaded rod 609 to rotate, it will drive the intermediate cylinder 606 to extend and retract relative to the outer cylinder 605. This will cause the threaded sleeve 608 and the inner cylinder 607 to extend and retract relative to the outer cylinder 605. At the same time, the threaded rod 609 can drive the threaded sleeve 608 to rotate, thereby driving the inner cylinder 607 to extend and retract relative to the intermediate cylinder 606. Since the intermediate cylinder 606, the threaded sleeve 608, and the inner cylinder 607 extend and retract synchronously relative to the outer cylinder 605, multi-stage extension and retraction of the inner cylinder 607 relative to the outer cylinder 605 is achieved, which is beneficial to increasing the extension and retraction length of the inner cylinder 607 relative to the outer cylinder 605, thereby increasing the extension and retraction length of the drill pipe.

[0025] It should be noted that during the drilling process, the telescopic system can extend the telescopic drill rod to effectively increase the drilling depth of drill bit 4; after drilling is completed, the telescopic system will retract the telescopic drill rod to facilitate the relocation of construction equipment.

[0026] Furthermore, the second drive mechanism includes a first bevel gear 613 and a second bevel gear 614. The first bevel gear 613 is fixed to the upper end of the threaded rod 609, and the second bevel gear 614 is fixed to the end of the rotating shaft 615, and the two mesh with each other. The rotating shaft 615 is horizontally rotatably connected to the side wall of the outer cylinder 605 via bearings. In addition, a hydraulic cylinder 618 is installed on the side wall of the moving frame 601. A second rotary motor 617 is fixed to the telescopic end of the hydraulic cylinder 618, and a fixed sleeve 616 is connected to the output end of the second rotary motor 617. When it is necessary to extend or retract the telescopic drill rod, the hydraulic cylinder 618 drives the second rotary motor 617, so that the fixed sleeve 616 forms a key connection with the outer end of the rotating shaft 615, thereby transmitting power to the threaded rod 609; while during the drilling process of the drill bit 4, the key connection between the fixed sleeve 616 and the rotating shaft 615 is disconnected. In order to achieve precise alignment between the fixed sleeve 616 and the rotating shaft 615, the first rotary motor 602 can be a servo motor to precisely control the rotation angle of the outer cylinder 605.

[0027] Furthermore, the high-pressure jetting system 2 is mounted on the chassis system 1 to provide high-pressure cement slurry. A pipe 610 is inserted inside the auger drill rod 5. The upper end of the pipe 610 is connected to the second rotary joint in the distributor 7, which is connected to the output end of the high-pressure jetting system 2 via a flexible hose. Simultaneously, the lower end of the pipe 610 is connected to the nozzle via a first rotary joint 611, which is mounted on the inner wall of the inner cylinder 607 via a support plate. In addition, a connecting hose 612 is provided in the middle section of the pipe 610 to accommodate the extension or retraction of the auger drill rod 5 relative to the power head 6. During operation, the high-pressure cement slurry passes sequentially through the high-pressure jetting system 2, the second rotary joint in the distributor 7, the pipe 610, and the connecting hose 612, finally being ejected at high speed from the nozzle on the drill bit 4.

[0028] It should be noted that drill bit 4 includes a main drill bit and two auxiliary drill bits, and the nozzle can be a liquid outlet hole set on the auxiliary drill bit. The structure of drill bit 4 and nozzle is prior art, and this application has not improved or innovated upon it. For the specific structure of drill bit 4 and nozzle, please refer to the invention patent with publication number CN114382072A, "High-Speed ​​Jetting Drill Bit, High-Speed ​​Jetting Drilling Machine, Anti-Seepage Wall Construction Method, and Anti-Seepage Wall."

[0029] Preferably, the high-pressure grouting system 2 includes a high-pressure slurry pump, an air compressor, and the integrated pipeline 610, which includes independent cement slurry pipelines and air pipelines.

[0030] Example 2 This embodiment provides a method for constructing a telescopic short spiral drilling and spraying integrated seepage-proof wall using the equipment described in Embodiment 1 above, specifically including the following steps: S1: Drill pipe selection and configuration: based on the design depth D of the anti-seepage wall and the on-site height restriction H. lim Based on the geological conditions of the strata, the length configuration of the auger drill rod 5 and the telescopic drill rod is determined to ensure that D ≤ L. max And H lim ≥ L min +Δh; where L max L represents the length of the drill pipe after it has been extended. min The length of the drill rod after the telescopic drill rod is retracted, and Δh is the spare height required for the installation of the power head 6 and the drill bit 4; It is understandable that, due to the total length L of the auger rod 5 and the fully retracted telescopic rod... min Including the minimum allowable height Δh required for the installation of components such as power head 6 and drill bit 4, it shall not exceed the on-site height limit H. lim H lim ≥ L min +Δh ensures that the equipment can be successfully transferred and operated in height-restricted environments.

[0031] S2: Equipment relocation and obstacle avoidance: The telescopic drill rod is fully retracted to the retracted state through the telescopic system to complete the obstacle avoidance and relocation. The telescopic drill rod is fully retracted to the retracted state in advance through the telescopic system. At this time, the construction equipment is moved to the working area on the top of the dike through the chassis system 1 to complete the obstacle avoidance and site transfer.

[0032] Specifically, after the hydraulic cylinder 618 drives the fixed sleeve 616 to mesh with the rotating shaft 615, the second rotary motor 617 drives the rotating shaft 615 to rotate. With the cooperation of the first bevel gear 613 and the second bevel gear 614, the threaded rod 609 is driven to rotate, thereby driving the intermediate cylinder 606 and the inner cylinder 607 to retract upwards, so that the telescopic drill rod is fully retracted.

[0033] S3: Segmented Drilling: The auger drill rod 5 is driven to rotate, and the power head 6 is driven to move downward along the lifting tower 3, so that the drill bit 4 can drill downward. During drilling, the auger blades of the auger drill rod 5 continuously discharge soil. If soil discharge is obstructed during drilling, causing drilling difficulties, the power head 6 drives the auger drill rod 5 to reverse at low speed to loosen the drill cuttings. When the power head 6 moves to the bottom of the lifting tower 3, it is driven to move upward along the lifting tower 3 in the opposite direction to its top. The telescopic drill rod is extended to its extended state, and the auger drill rod 5 continues to rotate, while the power head 6 moves downward along the lifting tower 3. Specifically, the first drive mechanism on the power head 6 is activated, driving the outer cylinder 605 to rotate, thereby driving the entire telescopic drill rod and auger drill rod 5 to rotate. At the same time, the lifting drive mechanism on the lifting tower 3 drives the power head 6 to move downward along the guide rail at a uniform speed, so that the drill bit 4 can drill downward. During drilling, the auger blades on the auger drill rod 5 continuously discharge the cut soil out of the hole.

[0034] When soil removal is obstructed or drilling resistance increases, control the first drive mechanism to drive the auger drill rod 5 to reverse at low speed. Use the centrifugal force and blade angle during the reversal to loosen the drill cuttings and assist in soil removal. Once the resistance decreases, resume forward rotation for drilling.

[0035] Drilling is paused when the power head 6 descends along the lifting tower 3 to its bottom limit position. At this point, the lifting tower 3 is first controlled to reverse and lift the power head 6 to the top of the tower. Then, the telescopic drill rod is extended to its extended state via the telescopic system, increasing the total length of the drill rod. Subsequently, the auger drill rod 5 continues to rotate and drill downwards, thereby achieving deep hole drilling beyond the height of the lifting tower 3. Therefore, the height of the lifting tower 3 in this application can be significantly lower than the actual drilling depth, helping to lower the overall center of gravity of the construction equipment and thus making the relocation of the construction equipment more convenient.

[0036] S4: Complete the drilling operation of adjacent holes: After the single hole construction is completed, retract the telescopic drill rod to the retracted state, lift the drill bit 4, and move the equipment to the next hole through the chassis system 1.

[0037] After drilling at a single hole is completed, the telescopic drill rod is fully retracted via the telescopic system. The chassis system 1 then moves the equipment to the next hole and repeats the drilling process of step S3 above to complete the drilling operation at the next hole.

[0038] S5: High-pressure jetting wall formation on the same side: After the next hole is drilled to the designed depth, the nozzle on the drill bit 4 is oriented towards the previous drilling direction. The high-pressure jetting system 2 is started, and high-pressure cement slurry is sprayed from the nozzle. At the same time, the drill bit 4 is raised at a preset lifting speed to cut the soil between the current hole and the previous hole, so that the current hole and the previous hole are connected. The cut soil and the sprayed cement slurry are solidified together to form part of the anti-seepage wall. After drilling to the designed depth at the next borehole, the high-pressure jetting system 2 is activated, delivering high-pressure cement grout to the nozzle on the drill bit 4 via pipeline 610. The high-pressure grout is ejected at high speed from the nozzle, powerfully cutting the soil between the current borehole and the previous borehole, thus connecting the two boreholes. Simultaneously, the lifting tower 3 uniformly raises the drill bit 4 until the entire borehole section has been sprayed. The cut soil and the sprayed cement grout then solidify together to form part of the impermeable wall.

[0039] S6: Cyclic Overlap Construction: After the construction of a single hole is completed, repeat steps S3-S5 to achieve continuous overlap of the wall at adjacent hole positions by spraying on the same side. S7: Retraction and Transfer: After the construction of a single section of the dike's anti-seepage wall is completed, the telescopic drill rod is fully retracted, and the equipment is transferred to the next section. After the overall construction of the anti-seepage wall of a section of the dike is completed, the power head 6 is lifted to the top of the lifting tower 3 via the lifting drive mechanism; then the telescopic system is activated to fully retract the telescopic drill rod to its shortest state. Subsequently, the equipment can be safely and conveniently transferred to the next construction section.

[0040] In some preferred embodiments, in step S3, when drilling into hard formations or formations containing large pebbles, the telescopic system retracts all the telescopic drill rods and drives the auger drill rod 5 to rotate in the opposite direction.

[0041] In another preferred embodiment, in step S3, when the design depth D of the anti-seepage wall for the required construction section is less than or equal to the total length L of the drill rod in the fully retracted state... min At this point, the required hole depth can be met using only the auger rod 5 and the non-extended telescopic drill rod. In this case, the extension step of the telescopic drill rod can be omitted, and a full auger drilling mode can be directly adopted. That is, the entire drilling process is completed solely by the lifting tower 3 driving the power head 6 to move up and down, thereby improving construction efficiency.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0043] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0044] Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The reference to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily indicate the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0045] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment, characterized in that, include: Chassis system (1); A spiral drill rod (5), with a drill bit (4) installed at the bottom end of the spiral drill rod (5); A power head (6) is used to drive the auger rod (5) to rotate; A lifting tower (3) is installed on a chassis system (1) and is used to drive the power head (6) to move up and down. The telescopic system is provided on the power head (6). The telescopic system includes a telescopic drill rod. The telescopic system is used to realize the extension and retraction of the telescopic drill rod so as to realize the extension and retraction of the auger drill rod (5) relative to the power head (6). High-pressure injection system (2), the high-pressure injection system (2) is used to provide high-pressure fluid; Pipeline (610) is located inside the auger borehole (5). A connecting hose (612) is provided in the middle of the pipeline (610) to accommodate the extension and retraction of the auger rod (5) relative to the power head (6). The upper and lower ends of the pipeline (610) are connected to the high-frequency system (2) and the nozzle respectively through rotary joints. The nozzle is located on the drill bit (4).

2. The telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment according to claim 1, characterized in that: The telescopic drill rod includes an outer cylinder (605), which is slidably engaged with an intermediate cylinder (606). The intermediate cylinder (606) is slidably engaged with an inner cylinder (607) via a spline. The bottom end of the inner cylinder (607) is integrally formed with the top end of the spiral drill rod (5). The top wall of the intermediate cylinder (606) is threadedly connected to the outer surface of a threaded rod (609). The threaded rod (609) is driven to rotate by a second drive mechanism. A downwardly extending protrusion (6061) is provided on the lower surface of the top wall of the intermediate cylinder (606). A threaded sleeve (608) is rotatably connected to the outer surface of the protrusion (6061) via a bearing. The threaded sleeve (608) is slidably engaged with the outer surface of the threaded rod (609) via a spline, and the outer surface of the threaded sleeve (608) is threadedly connected to the top wall of the inner cylinder (607).

3. The telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment according to claim 2, characterized in that: The power head (6) includes a movable frame (601), and the upper end of the outer cylinder (605) is rotatably connected to the movable frame (601). The movable frame (601) is provided with a first driving mechanism, which is used to drive the outer cylinder (605) to rotate.

4. The telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment according to claim 3, characterized in that: The second drive mechanism includes a first bevel gear (613) and a second bevel gear (614) that are in transmission engagement. The first bevel gear (613) is mounted on the outer surface of the upper end of the threaded rod (609), and the second bevel gear (614) is mounted on the rotating shaft (615). The rotating shaft (615) is rotatably connected to the outer cylinder (605). The telescopic end of the hydraulic cylinder (618) mounted on the moving frame (601) is fixedly connected to a second rotary motor (617). The output end of the second rotary motor (617) is fixedly connected to a fixed sleeve (616). The inner surface of the fixed sleeve (616) is used for key connection with the outer surface of the rotating shaft (615).

5. The telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment according to claim 2, characterized in that: The outer cylinder (605) is equipped with a support plate, which is rotatably engaged with the upper end of the threaded rod (609) via a bearing.

6. The construction method of the telescopic short spiral drilling and spraying integrated seepage prevention wall construction equipment according to claim 2, characterized in that: The inner cylinder (607) is equipped with a first rotary joint (611) through a support plate. The first rotary joint (611) is connected to the nozzle on the drill bit (4) through a connecting pipe.

7. A construction method based on the construction equipment according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1: Drill pipe selection and configuration: based on the design depth D of the anti-seepage wall and the on-site height restriction H. lim Based on the geological conditions of the strata, determine the length configuration of the auger drill rod (5) and the telescopic drill rod to ensure that D ≤ L. max And H lim ≥ L min +Δh; where L max L represents the length of the drill pipe after it has been extended. min The length of the drill rod after the telescopic drill rod is retracted, and Δh is the spare height required for the installation of the power head (6) and the drill bit (4); S2: Equipment relocation and obstacle avoidance: The telescopic drill rod is fully retracted to the retracted state through the telescopic system to complete the obstacle avoidance and relocation. S3: Segmented drilling: Drive the spiral drill rod (5) to rotate and drive the power head (6) to move down along the lifting tower (3) so that the drill bit (4) can drill downwards; During the drilling process, the spiral blades of the spiral drill rod (5) are used to continuously discharge soil; If the soil discharge is not smooth during the drilling process, causing drilling difficulties, the power head (6) drives the spiral drill rod (5) to reverse at low speed to loosen the drill cuttings; When the power head (6) moves to the bottom of the lifting tower (3); Drive the power head (6) to move up along the lifting tower (3) in the opposite direction to its top; Expand the telescopic drill rod to the extended state, continue to drive the spiral drill rod (5) to rotate, and drive the power head (6) to move down along the lifting tower (3); S4: Complete the drilling operation of adjacent holes: After the single hole construction is completed, retract the telescopic drill rod to the retracted state, lift the drill bit (4), and move the equipment to the next hole through the chassis system (1); S5: High-pressure jetting wall formation on the same side: After the next hole is drilled to the designed depth, the nozzle on the drill bit (4) is directed toward the previous drilling direction, the high-pressure jetting system (2) is started, and high-pressure cement slurry is sprayed from the nozzle. At the same time, the drill bit (4) is lifted at the preset lifting speed to cut the soil between the current hole and the previous hole, so that the current hole and the previous hole are connected. The cut soil and the sprayed cement slurry are solidified together to form part of the anti-seepage wall. S6: Cyclic Overlap Construction: After the construction of a single hole is completed, repeat steps S3-S5 to achieve continuous overlap of the wall at adjacent hole positions by spraying on the same side. S7: Retraction and Transfer: After the construction of a single section of the dike seepage prevention wall is completed, the telescopic drill rod is fully retracted and the equipment is transferred to the next section.

8. The construction method according to claim 7, characterized in that, In step S3, when drilling into hard strata or strata containing large pebbles, the telescopic system retracts all the telescopic drill rods and drives the auger drill rod (5) to rotate in the opposite direction.

9. The construction method according to claim 7, characterized in that, In step S3, when the design depth D of the anti-seepage wall for the required construction section is less than or equal to the total length L of the contracted state... min At this time, the full spiral drilling mode can be directly adopted without the need to unfold the telescopic drill rod.

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