A rotary drilling construction apparatus and method

Abstract

The present application relates to the technical field of drilling tool accessories, and particularly relates to a rotary drilling construction equipment and method, wherein the rotary drilling construction equipment comprises a rotary drilling machine and a rotary drilling structure, the rotary drilling machine is rotationally connected with a rotating shaft, the rotating shaft is connected with the rotary drilling structure, and the rotary drilling machine can drive the rotary drilling structure to rotate and / or lift through the rotating shaft; the rotary drilling structure comprises a rotary drilling piece and an anti-shrinking wall protection assembly fixed on the rotary drilling piece; the anti-shrinking wall protection assembly comprises a wall cylinder, a driving unit arranged in the wall cylinder and at least two wall stabilizing units, the wall stabilizing units have a shrinking state and an expanding state, and the wall stabilizing units have a tendency to expand outward when the wall cylinder rotates, so that the shrinking phenomenon of the conventional rotary drilling construction equipment after completing the drilling operation is solved, and in particular, the problems of pile foundation quality decline and safety hazards caused by the deformation of the hole wall in soft soil, silt or plastic soil stratum are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling tool accessories, in particular to a rotary drilling construction equipment and method. BACKGROUND

[0002] Rotary drilling construction equipment, as a kind of efficient foundation treatment tool, is widely used in pile foundation construction of infrastructure such as building, bridge and highway. Its core is rotary drilling rig, which provides strong down pressure and rotary power through hydraulic system to drive drill pipe and drill bit to cut into stratum. This kind of equipment can deal with various geological conditions including clay, sand, rock, etc., providing strong support for infrastructure construction. The efficiency and environmental protection of rotary drilling technology have been widely recognized and applied.

[0003] However, the traditional rotary drilling construction equipment generally has the problem of shrinkage after completing the drilling operation, which seriously affects the quality of pile foundation and the progress of the project. The root cause of shrinkage is the interweaving influence of various factors. Especially in the stratum containing a large amount of soft soil, silt or plastic soil, the mechanical properties of the soil are poor and are easily deformed under external pressure. When drilling operation is carried out, the rotation and advancement of the drilling tool will generate certain pressure on the hole wall, causing the soil of the hole wall to be extruded into the hole, thereby forming shrinkage. In some cases, the shrinkage may be so small that it cannot meet the design requirements, which not only leads to the decrease of the bearing capacity of pile foundation, but also may cause quality problems such as pile inclination and fracture, seriously affecting the stability and safety of the engineering structure.

[0004] Therefore, the present application provides a rotary drilling construction equipment and method to solve the above technical problems. SUMMARY

[0005] One of the purposes of the present application is to provide a rotary drilling construction equipment. The traditional rotary drilling construction equipment generally has the problem of shrinkage after completing the drilling operation, especially for the quality decline and safety hazard of pile foundation caused by the deformation of hole wall in soft soil, silt or plastic soil stratum. The second purpose is to provide a method.

[0006] In order to achieve the above purposes, the technical solutions adopted by the present application are as follows:

[0007] A rotary drilling construction equipment, comprising a rotary drilling machine and a rotary drilling structure, the rotary drilling machine is rotatably connected with a rotating shaft, the rotating shaft is connected with the rotary drilling structure, and the rotary drilling machine can drive the rotary drilling structure to rotate and / or lift through the rotating shaft;

[0008] The rotary drilling structure comprises a rotary drilling piece and an anti-shrinkage wall protection assembly fixed on the rotary drilling piece;

[0009] The anti-shrink wall protection assembly comprises a wall cylinder, a driving unit arranged in the wall cylinder, and at least two wall stabilizing units, one end of the wall cylinder is connected with the rotating shaft, and the other end is connected with the rotary digging piece;

[0010] The wall stabilizing units are uniformly distributed on the outer periphery of the wall cylinder and are connected with the driving unit, and the driving unit is used to change the position and angle of the wall stabilizing units;

[0011] The wall stabilizing units have a shrinkage state and an expansion state, and when the wall cylinder rotates, the wall stabilizing units have a tendency to expand outward.

[0012] According to the above technical solution, the working principle of the rotary drilling construction equipment mainly depends on the cooperation of the rotary digging machine and the rotary digging structure thereon, the rotary digging machine serves as a power source and is closely connected with the rotary digging structure through the rotating shaft, so as to drive the rotary digging structure to rotate and lift;

[0013] During operation, the rotary digging machine is started, the rotary digging structure is rotated as a whole through the rotating shaft, and the core component of the rotary digging structure is the rotary digging piece which directly participates in the work of rotary drilling.

[0014] The anti-shrink wall protection assembly mainly comprises a wall cylinder, a driving unit and at least two wall stabilizing units, one end of the wall cylinder is connected with the rotating shaft, and the other end is connected with the rotary digging piece, so as to ensure the stability of the whole assembly during rotation.

[0015] When the wall cylinder rotates, the wall stabilizing units arranged above the rotary digging piece begin to play a role, these wall stabilizing units have a tendency to expand outward due to centrifugal force during rotation, can be in close contact with the hole wall, thereby playing a role in supporting and stabilizing the hole wall. This outward expansion action enables the wall stabilizing units to quickly generate friction and closely contact with the hole wall, and such close fitting not only enhances the supporting force of the wall stabilizing units on the hole wall, but also further improves the density of the hole wall through friction, which means that the combination between soil particles is more compact, thereby enhancing the strength and stability of the hole wall, effectively avoiding the occurrence of shrinkage phenomenon. Even in the case of complex stratum conditions and soil deformation, the wall stabilizing units can ensure the integrity and stability of the hole wall by virtue of their tendency to expand outward and close fitting, laying a solid foundation for subsequent pile foundation construction.

[0016] Further, the driving unit comprises a fixed ring, a sleeve and an angle conversion assembly, the fixed ring is fixedly arranged in the interior of the wall barrel, the sleeve is fixed on the fixed ring, the outer periphery of the sleeve is fixedly connected with a plurality of support rods, each support rod is movably connected with a mounting piece, the mounting piece has a first state and a second state; each stabilizing wall unit is fixedly arranged on a corresponding mounting piece, and the angle conversion assembly is connected with the mounting piece and used for driving the state of the mounting piece to change.

[0017] According to the above technical scheme, in the working process, the fixed ring is stably arranged in the interior of the wall barrel, thereby providing stable support for the whole assembly, and the sleeve is fixed on the fixed ring, and the outer periphery of the sleeve is movably connected with the mounting piece through a plurality of support rods. This design enables the mounting piece to be flexibly adjusted in angle within a certain range.

[0018] The mounting piece has a first state and a second state, and the conversion between the two states is realized through the connection with the angle conversion assembly. The angle conversion assembly can drive the mounting piece to adjust the angle during rotation through precise mechanical structure. This adjustment can be made according to the shape, inclination and soil conditions of the hole wall, so as to ensure the close fit and effective support between the stabilizing wall unit and the hole wall.

[0019] Since the shape and inclination of the hole wall may vary due to different geological conditions, if the angle of the mounting piece is fixed, the stabilizing wall unit may not completely fit the hole wall, thereby affecting the polishing effect and the stability of the hole wall. By adjusting the angle of the mounting piece, the stabilizing wall unit can better adapt to the shape and inclination of the hole wall, ensuring close contact between the stabilizing wall unit and the hole wall, thereby improving the efficiency and quality of polishing. Secondly, changing the angle of the mounting piece helps to realize all-around polishing of the hole wall. If the angle of the mounting piece is fixed, the stabilizing wall unit may only polish a certain part of the hole wall, ignoring other parts. By adjusting the angle of the mounting piece, the stabilizing wall unit can cover different positions of the hole wall during rotation, realizing all-around polishing of the hole wall, expanding the hole diameter while further improving the stability and load-bearing capacity of the hole wall, and enhancing the support effect on the hole wall. Secondly, by adjusting the angle of the mounting piece, the stability and load-bearing capacity of the hole wall can be further improved. In addition, the change of the angle of the mounting piece can also reduce the resistance and vibration during drilling, improve the construction efficiency and quality.

[0020] Further, the angle conversion assembly comprises a slide rod, a first connecting rod and a second connecting rod, the number of the first connecting rods and the second connecting rods is multiple, each first connecting rod is fixedly connected with the end of the slide rod, the first connecting rod is movably connected with the corresponding second connecting rod, and the second connecting rod is movably connected with the mounting piece;

[0021] The slide rod is axially slidable along the sleeve for driving the mounting member to transform from the first state to the second state or from the second state to the first state.

[0022] According to the above technical solution, the angle transformation assembly is a key component in the anti-shrinkage protection wall assembly, which realizes flexible adjustment of the angle of the mounting member through the cooperative action of the slide rod, the first connecting rod and the second connecting rod.

[0023] In operation, the slide rod slides along the axial direction of the sleeve. This sliding action drives the movement of the first connecting rod fixedly connected with the slide rod. Since the first connecting rod is movably connected with the corresponding second connecting rod, the movement of the first connecting rod drives the second connecting rod to transform in angle. The other end of the second connecting rod is movably connected with the mounting member, so that the mounting member changes its state along with the angle transformation of the second connecting rod. Specifically, when the slide rod slides forward, it drives the mounting member to transform from the first state to the second state; when the slide rod slides backward, it drives the mounting member to return from the second state to the first state. Through this design, the angle transformation assembly can accurately control the angle change of the mounting member, thereby ensuring the close fit and effective support between the stabilizing unit and the hole wall, and improving the quality and efficiency of rotary drilling construction.

[0024] Further, the first connecting rod and the second connecting rod are provided with a first hinge ball, two first installation grooves are formed in the first hinge ball, and the two first installation grooves are perpendicular and cross each other; the second connecting rod and the mounting member are provided with a second hinge ball, two second installation grooves are formed in the second hinge ball, and the two second installation grooves are perpendicular and cross each other.

[0025] The end of the first connecting rod is provided with a first arc-shaped claw, both ends of the second connecting rod are provided with a second arc-shaped claw, and the mounting member is rotatably connected with a third arc-shaped claw.

[0026] The first arc-shaped claw and the second arc-shaped claw of one of them respectively extend into the two first installation grooves arranged correspondingly, and the other second arc-shaped claw and the third arc-shaped claw respectively extend into the two second installation grooves arranged correspondingly.

[0027] In the anti-shrinkage protection wall assembly, the connection between the first connecting rod and the second connecting rod, and the connection between the second connecting rod and the mounting member both adopt the design of hinge ball and arc-shaped claw.

[0028] Specifically, the end of the first connecting rod is provided with a first arc-shaped claw, which extends into two vertical and intersecting first installation slots formed on the first hinge ball. Meanwhile, the two ends of the second connecting rod are respectively provided with second arc-shaped claws, one of which extends into the first installation slot of the first hinge ball to achieve the movable connection of the first connecting rod and the second connecting rod together with the first arc-shaped claw, and the other extends into two vertical and intersecting second installation slots formed on the second hinge ball.

[0029] The third arc-shaped claw rotatably connected to the mounting member extends into the second installation slot of the second hinge ball, achieving the movable connection between the second connecting rod and the mounting member.

[0030] Through this design, the first connecting rod, the second connecting rod and the mounting member can be flexibly transformed in angle, ensuring that the anti-shrinking protective wall assembly can closely fit the hole wall during the rotary drilling process, and improving the construction quality and efficiency.

[0031] Compared with the traditional hinge connection mode, the hinge ball and arc-shaped claw connection design adopted by the present application has a significant advantage in degree of freedom. The traditional hinge connection can usually only realize rotation in a single direction, limiting the flexibility of the connection. In the present application, the vertical and intersecting installation slots on the first and second hinge balls cooperate with the arc-shaped claws, so that the first connecting rod and the second connecting rod, and the second connecting rod and the mounting member can realize flexible rotation in multiple directions, greatly increasing the degree of freedom of the connection. This design enables the anti-shrinking protective wall assembly to better adapt to the changes of the hole wall during the rotary drilling process, improving the flexibility and efficiency of the construction.

[0032] Further, the rotary drilling member comprises a drill cylinder and a drill cover, the drill cover is arranged at the bottom of the drill cylinder in an openable and closable manner, and a plurality of breaking heads are arranged on the drill cover;

[0033] A collecting groove is formed on the drill cover and communicates with the inner cavity of the drill cylinder;

[0034] A first rod member, a second rod member and a connecting hook are arranged in the drill cylinder, and a connecting block is arranged on the drill cover, the connecting hook and the connecting block can be connected or disconnected with each other;

[0035] One end of the first rod member is hingedly connected to the top of the drill cylinder, the other end of the first rod member is hingedly connected to one end of the second rod member, the other end of the second rod member is hingedly connected to the connecting hook, the middle part of the connecting hook is hingedly connected to the drill cylinder, and a first pushing rod is arranged on the first rod member, the first pushing rod is used to change the angle of the connecting hook.

[0036] According to the technical scheme, the drill cover is arranged at the bottom of the drill cylinder in an openable and closable manner, and a crushing head arranged on the drill cover is used for crushing soil, in the rotary digging process, the soil is crushed and then enters the inner cavity of the drill cylinder, and is collected by the collecting groove. When the amount of the collected soil in the collecting groove reaches a preset amount, the first push rod is operated to drive the first rod and the second rod to link. The linkage causes the angle of the connecting hook to change, and then drives the connecting block on the drill cover to open the drill cover relative to the drill cylinder. At this time, the drill cylinder can be lifted to pour out the soil in the collecting groove. After the soil pouring is completed, the drill cover is closed, and the rotary digging piece can continue to dig deeper into the hole for rotary digging operation. The rotary digging piece can efficiently crush, collect and process soil, and the construction efficiency is improved.

[0037] Further, the wall cylinder is internally fixedly provided with a mounting ring, the mounting ring is provided with a driving piece, and the driving piece is used for driving the slide rod to ascend or descend, and / or,

[0038] The first push rod is driven to ascend or descend.

[0039] Further, the top of the slide rod is hingedly connected with a first hinge rod, the first hinge rod is hingedly connected with a second hinge rod, the middle part of the first hinge rod is provided with a fixed strip, the first hinge rod is rotationally connected with the fixed strip, the fixed strip is fixed in the interior of the wall cylinder, and the second hinge rod is connected with a second push rod, and the second push rod is connected with the driving piece.

[0040] According to the technical scheme, the wall cylinder is internally fixedly provided with a mounting ring, the mounting ring is provided with a driving piece, and the driving piece is used for driving the slide rod to ascend or descend, and / or,

[0041] When the driving piece is started, it drives the second hinge rod through the second push rod, and then drives the first hinge rod to rotate around the fixed strip. The rotating movement is finally converted into the ascending or descending movement of the slide rod, so that the angle of the anti-shrinking protection wall assembly is accurately adjusted. At the same time, the driving piece can also directly drive the first push rod to control the opening and closing of the drill cover of the rotary digging piece, and realize the multi-functional cooperative operation.

[0042] Further, the top of the slide rod is hingedly connected with a first hinge rod, the first hinge rod is hingedly connected with a second hinge rod, the middle of the first hinge rod is provided with a fixed strip, the first hinge rod is rotationally connected with the fixed strip, the fixed strip is fixed in the wall barrel, the second hinge rod is connected with the first push rod, and the first push rod is connected with the driving part.

[0043] According to the above technical scheme, the top of the slide rod is hingedly connected with a first hinge rod in the wall barrel, which enables the movement of the slide rod to be transmitted through the hinged connection.

[0044] The other end of the first hinge rod is hingedly connected with a second hinge rod, which enables the movement of the first hinge rod to be further transmitted to the second hinge rod.

[0045] When the driving part is started, it applies a pushing force or a pulling force to the second hinge rod through the first push rod, which is transmitted to the first hinge rod through the second hinge rod, and finally converted into the upward or downward movement of the slide rod through the rotational relationship between the first hinge rod and the fixed strip.

[0046] Further, the wall stabilizing unit comprises a column rod, a drill strip, and mounting seats fixed at both ends of the column rod, the mounting seats are connected with the mounting part, the column rod is provided with a first mounting strip, a second mounting strip, and a third mounting strip between the column rod and the wall stabilizing drill strip, the first mounting strip and the second mounting strip are arranged in parallel, a sleeve ring is slidably arranged on the column rod, a tension spring is arranged between the sleeve ring and one of the mounting seats, one end of the third mounting strip is hingedly connected with the sleeve ring, and the other end of the third mounting strip is hingedly connected with the middle of the second mounting strip.

[0047] According to the above technical scheme, the wall stabilizing unit is stably connected with the mounting part through the mounting seats, and the sleeve ring slidably arranged on the column rod has a contraction tendency under the action of the tension spring.

[0048] During rotation, the wall stabilizing unit expands outwardly due to the centrifugal force and tightly contacts with the hole wall.

[0049] The contact between the stabilizing units and the hole wall further increases the density of the hole wall through friction, that is, the combination between soil particles is more compact. This design not only enhances the strength and stability of the hole wall, but also effectively prevents the collapse of the hole wall during drilling, thereby improving the accuracy and efficiency of rotary drilling.

[0050] A rotary drilling construction method, comprising the rotary drilling construction device as described above, further comprising the following steps:

[0051] A preparation step: connecting the rotary drilling machine, the rotary drilling structure and the rotating shaft, aligning the rotary drilling part of the rotary drilling structure to the position to be drilled, and ensuring that the stabilizing units of the anti-collapse protection wall assembly can extend into the hole to be drilled in the collapsed state;

[0052] A drilling starting step: starting the rotary drilling machine, rotating and lifting the whole rotary drilling structure through the rotating shaft, and driving the rotary drilling part to start drilling the hole while grouting into the hole;

[0053] During the rotary drilling process, the stabilizing units of the anti-collapse protection wall assembly are transformed from the collapsed state to the expanded state under the action of centrifugal force, and are in close contact with the hole wall to support and stabilize the hole wall;

[0054] An adjustment step: periodically sliding the sliding rod along the sleeve in the axial direction through the driving member provided on the rotary drilling machine, and then continuously adjusting the angle of the mounting part through the angle conversion assembly, so that the stabilizing units are transformed between the first state and the second state;

[0055] A soil collection and treatment step: the soil collected by the rotary drilling part during the drilling process is collected through the collection groove thereon, when the soil in the collection groove reaches a preset amount, the rotary drilling part is lifted, the first push rod is driven by the driving member to open the drill cover, the soil is poured after the drill cover is closed, and the rotary drilling operation is continued;

[0056] A drilling completion step: when the hole reaches the predetermined depth and diameter, the rotary drilling machine is stopped, the rotary drilling structure is lifted out of the hole, and the drilling operation is completed.

[0057] Advantages of the present application:

[0058] The rotary drilling construction device of the present application has an innovative anti-collapse protection wall assembly design, the stabilizing units in the anti-collapse protection wall assembly can expand outwardly with the rotation of the rotary drilling structure, closely fit the hole wall, and effectively prevent the occurrence of the hole collapse phenomenon. At the same time, the angle of the stabilizing units periodically changes, which can better adapt to the shape of the hole wall under different geological conditions, further enhances the stability of the hole wall, reduces the resistance and vibration during drilling, improves the load capacity and density of the hole wall, and lays a solid foundation for subsequent pile foundation construction.

[0059] The angle transformation assembly and the connection design of the hinge ball and the arc-shaped claw of the present application make the stabilizing wall unit be able to flexibly adjust the angle, ensure that the stabilizing wall unit is in close contact with the hole wall during the rotary digging process, greatly enhance the adaptability and flexibility of the equipment, enable the equipment to cope with various complex geological conditions, and improve the accuracy and efficiency of drilling.

[0060] The upper crushing head of the rotary digging piece of the present application can efficiently crush the soil, and the collection groove effectively collects the cuttings generated during drilling. When the soil in the collection groove reaches the preset amount, the rotary cover can be opened and closed through simple operation, the soil is poured out, and the rotary digging operation in the hole is continued. The present application not only optimizes the soil crushing and cutting effect, but also improves the continuous operation capacity of the equipment, ensures the smooth progress of the construction progress, and has the advantages of simple structure, convenient operation and low maintenance cost, which brings significant convenience and economic benefits to the rotary drilling construction.

[0061] Other advantages, objects and features of the present application will be set forth in part in the following specification, and in part will be apparent from the study thereof, or can be learned from practice of the present application, and the objects and other advantages of the present application can be realized and obtained by the specific embodiments described below. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1 It is a schematic diagram of the overall structure of the rotary drilling construction equipment of the present application;

[0063] Figure 2 It is a schematic diagram of the rotary digging structure of the rotary drilling construction equipment of the present application;

[0064] Figure 3 It is a schematic diagram of the rotary digging structure of the rotary drilling construction equipment of the present application;

[0065] Figure 4 It is a schematic diagram of the driving unit structure of the rotary drilling construction equipment of the present application;

[0066] Figure 5 It is a schematic diagram of the disassembled structure of the rotary drilling construction equipment of the present application; Figure 4

[0067] Figure 6 It is a schematic diagram of the structure of the first state of the mounting piece of the rotary drilling construction equipment of the present application;

[0068] Figure 7 It is a schematic diagram of the structure of the second state of the mounting piece of the rotary drilling construction equipment of the present application;​

[0069] Figure 8 In the rotary drilling construction equipment of the present invention Figure 7 A schematic diagram of the exploded structure;

[0070] Figure 9 This is a schematic diagram of the rotary drilling component and the anti-shrinkage wall protection assembly in the rotary drilling construction equipment of the present invention;

[0071] Figure 10 This is a schematic cross-sectional view of the rotary drilling component and the anti-shrinkage wall protection assembly in the rotary drilling construction equipment of the present invention.

[0072] Figure 11 This is a schematic diagram of a second cross-sectional structure of the rotary drilling component and the anti-shrinkage wall assembly in the rotary drilling equipment of the present invention.

[0073] Figure 12 This is a schematic diagram of the third cross-sectional structure of the rotary drilling component and the anti-shrinkage wall protection assembly in the rotary drilling construction equipment of the present invention.

[0074] Figure 13 This is a schematic diagram of the wall stabilizing unit in the rotary drilling equipment of the present invention.

[0075] The components include: rotary drilling rig 1, rotary drilling structure 2, rotating shaft 3, rotary drilling component 4, drill barrel 41, first rod 411, second rod 412, connecting hook 413, connecting block 414, drill cover 42, breaker head 43, collection trough 44, first push rod 45, anti-shrinkage wall protection assembly 5, wall cylinder 51, mounting ring 511, driving component 512, driving unit 52, fixing ring 521, sleeve 522, angle transformation assembly 523, slide bar 5231, first connecting rod 5232, second connecting rod 5233, and support rod 52. 4. Mounting component 525, first hinge ball 526, first mounting groove 5261, second hinge ball 527, second mounting groove 5262, first arc-shaped claw 528, second arc-shaped claw 529, third arc-shaped claw 530, wall stabilizing unit 53, first hinge rod 5311, second hinge rod 5312, fixing strip 5313, second push rod 5314, column rod 531, wall stabilizing drill bit 532, mounting base 533, first mounting strip 534, second mounting strip 535, third mounting strip 536, collar 537. Detailed Implementation

[0076] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0077] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0078] This embodiment proposes a rotary drilling construction device, such as... Figure 1 Zhihe Figure 13 As shown, the system includes a rotary drilling rig 1 and a rotary drilling structure 2. A rotating shaft 3 is rotatably connected to the rotary drilling rig 1, and the rotating shaft 3 is connected to the rotary drilling structure 2. The rotary drilling rig 1 can drive the rotary drilling structure 2 to rotate and / or lift / lower via the rotating shaft 3. The rotary drilling rig 1 is equipped with a drive motor (not shown) and a hydraulic cylinder (not shown). The output shaft of the drive motor is coaxially connected to the rotating shaft 3, and the drive motor drives the rotary drilling structure 2 to rotate via the rotating shaft 3. At the same time, the hydraulic cylinder is mounted on the rotary drilling rig 1, and the output end of the hydraulic cylinder is connected to the rotating shaft 3 to drive the rotating shaft 3 to rise or fall.

[0079] like Figure 2 and Figure 3 As shown, the rotary drilling structure 2 includes a rotary drilling component 4 and an anti-shrinkage wall protection assembly 5 fixed on the rotary drilling component 4; the anti-shrinkage wall protection assembly 5 includes a wall cylinder 51, a drive unit 52 disposed within the wall cylinder 51, and at least two wall stabilizing units 53, with one end of the wall cylinder 51 (i.e., Figure 3 The top end of the middle wall cylinder 51 is coaxially connected to the rotating shaft 3, and the other end (i.e. Figure 3 The bottom end of the middle wall cylinder 51 is connected to the rotary drilling component 4; each stabilizing unit 53 is evenly distributed on the outer periphery of the wall cylinder 51 and connected to the drive unit 52. The drive unit 52 is used to change the position and angle of the stabilizing unit 53; the stabilizing unit 53 has a contracted state and an expanded state. When the wall cylinder 51 rotates, the stabilizing unit 53 tends to expand outward. When the stabilizing unit 53 is in the contracted state, the circular projection formed by the stabilizing units 53 is smaller than the diameter of the rotary drilling component 4, which facilitates insertion into the hole of the rotary drilling component; when the rotary drilling structure 2 rotates, the circular projection formed by the stabilizing units 53 (that is, the circular projection formed by the connection of the stabilizing units 53 in the top view) is greater than or equal to the diameter of the rotary drilling component 4.

[0080] The stable wall unit 53 has a contracted state and an expanded state, can adapt to rotary digging holes of different diameters, and can improve the adaptability of rotary digging.

[0081] In the embodiment, the rotary digging machine 1 and the rotary digging structure 2 mounted on the rotary digging machine 1 cooperatively work, the rotary digging machine 1 drives the rotary digging part 4 to perform rotary digging, in the working process, the rotary digging machine 1 is started, the rotary digging structure 2 is driven to rotate as a whole by the rotating shaft 3, and the rotary digging part 4 is a core component of the rotary digging structure 2 and directly participates in the work of rotary drilling. At the same time, the anti-shrinkage and wall protection assembly 5 fixed on the rotary digging part 4 also rotates together, when the wall cylinder 51 rotates, the stable wall unit 53 arranged above the rotary digging part 4 begins to play a role, the stable wall unit 53 expands outward in the rotating process due to centrifugal force, can be in close contact with the hole wall, thereby playing a role in supporting and stabilizing the hole wall. This outward expansion action enables the stable wall unit 53 to quickly and closely contact the hole wall and generate friction, thereby enhancing the supporting force of the stable wall unit 53 on the hole wall, and further improving the density of the hole wall through friction, which means that the combination between soil particles is more compact, thereby enhancing the strength and stability of the hole wall, effectively avoiding the occurrence of the shrinkage phenomenon, even in the case of complex stratum conditions and soil deformation, the stable wall unit 53 can ensure the integrity and stability of the hole wall by virtue of its outward expansion trend and close adhesion, and lay a solid foundation for subsequent pile foundation construction.

[0082] As a preferred embodiment, as shown in Figure 4 The driving unit 52 includes a fixed ring 521, a sleeve 522 and an angle conversion assembly 523, the fixed ring 521 is fixedly arranged in the inside of the wall cylinder 51, the sleeve 522 is fixed on the fixed ring 521, a plurality of support rods 524 are fixedly connected to the outer periphery of the sleeve 522, a plurality of movable holes through which the support rods 524 can pass are formed in the wall cylinder 51, the movable holes are larger than the outer diameters of the support rods 524, and in a possible embodiment, a plugging member can be arranged at the movable hole after the support rod 524 penetrates through the movable hole, so as to accommodate the movement of the support rod 524 and achieve the purpose of plugging external silt from entering the inside of the wall cylinder 51. Each support rod 524 is movably connected to a mounting member 525 after penetrating through the movable hole, the mounting member 525 has a first state and a second state, each stable wall unit 53 is fixedly arranged on the corresponding mounting member 525, and the angle conversion assembly 523 is connected with the mounting member 525 and used to drive the mounting member 525 to change the state.

[0083] According to the technical scheme, in the working process, the fixed ring 521 is stably arranged in the wall barrel 51 to provide stable support for the whole assembly, and the sleeve 522 is fixed on the fixed ring 521, and the outer periphery of the sleeve 522 is movably connected with the mounting piece 525 through the support rods 524. This design enables the mounting piece 525 to be flexibly adjusted in a certain range. The mounting piece 525 has a first state and a second state, and the conversion between the two states is realized through the connection with the angle conversion assembly 523, thereby driving the mounting piece 525 to adjust the angle in the conversion process. It should be noted that, since the shape and inclination of the hole wall may vary due to different geological conditions, if the angle of the mounting piece 525 is fixed, the wall stabilizing unit 53 may not be able to completely contact the hole wall, thereby affecting the friction effect and the stability of the hole wall. By adjusting the angle of the mounting piece 525, the wall stabilizing unit 53 can better contact the hole wall, thereby improving the stability of the hole wall. When the rotary digging structure 2 rotates, the wall stabilizing unit 53 can cover different positions of the hole wall in the rotation process, realizing all-around cutting and polishing of the hole wall, expanding the hole diameter and further improving the stability and bearing capacity of the hole wall, and enhancing the support effect of the hole wall. At the same time, the angle change of the wall stabilizing unit 53 on the mounting piece 525 can also reduce the resistance and vibration of the drill in the drilling process, to a certain extent, improving the construction efficiency and quality.

[0084] As a preferred embodiment, as shown in Figures 4 to 8 The angle conversion assembly 523 includes a slide rod 5231, a first connecting rod 5232 and a second connecting rod 5233. The number of the first connecting rods 5232 and the second connecting rods 5233 is multiple. Each first connecting rod 5232 is fixedly connected with the bottom of the slide rod 5231. The first connecting rod 5232 is movably connected with the corresponding second connecting rod 5233. The second connecting rod 5233 is movably connected with the mounting piece 525. The slide rod 5231 can slide along the axial direction of the sleeve 522, and is used to drive the mounting piece 525 to convert from the first state ( Figure 6 ) to the second state ( Figure 7 ), or from the second state ( Figure 7 ) to the first state ( Figure 6 ). The angle conversion assembly 523 is a key component in the anti-shrinkage protection wall assembly 5. Through the cooperative action of the slide rod 5231, the first connecting rod 5232 and the second connecting rod 5233, the angle of the mounting piece 525 can be flexibly adjusted. In the working process, the slide rod 5231 slides along the axial direction of the sleeve 522, and this sliding action drives the movement of the first connecting rod 5232 fixedly connected with the slide rod 5231.

[0085] Since the first connecting rod 5232 is movably connected with the corresponding second connecting rod 5233, the movement of the first connecting rod 5232 will drive the second connecting rod 5233 to change the angle; the other end of the second connecting rod 5233 is movably connected with the mounting piece 525, so as the second connecting rod 5233 changes the angle, the mounting piece 525 will also change its state, specifically, as shown in Figure 6 when the slide rod 5231 slides downward, the slide rod 5231 drives each first connecting rod 5232 to move downward, the angle and position of the second connecting rod 5233 connected with the first connecting rod 5232 will change, and then drive the mounting piece 525 to change from the first state to the second state; similarly, when the slide rod 5231 slides upward, it will drive the mounting piece 525 to return to the first state from the second state. Through this design, the angle transformation assembly 523 can accurately control the angle change of the mounting piece 525, so as to ensure that the stabilizing wall unit 53 changes periodically, which can make the stabilizing wall unit 53 better contact the hole wall and avoid the phenomenon of shrinkage hole.

[0086] Further, as shown in Figure 8 the first connecting rod 5232 and the second connecting rod 5233 are provided with a first hinge ball 526, the first hinge ball 526 is provided with two first installation grooves 5261 which are perpendicular and cross each other; the second connecting rod 5233 and the mounting piece 525 are provided with a second hinge ball 527, the second hinge ball 527 is provided with two second installation grooves 5262 which are perpendicular and cross each other; the end of the first connecting rod 5232 is provided with a first arc-shaped claw 528, both ends of the second connecting rod 5233 are provided with a second arc-shaped claw 529, and the mounting piece 525 is rotatably connected with a third arc-shaped claw 530; the first arc-shaped claw 528 and one of the second arc-shaped claws 529 respectively extend into the two first installation grooves 5261 which are correspondingly arranged, and the other second arc-shaped claw 529 and the third arc-shaped claw 530 respectively extend into the two second installation grooves 5262 of the second hinge ball 527.

[0087] Specifically, the end of the first connecting rod 5232 is provided with a first arc-shaped claw 528, which extends into two vertical and intersecting first installation slots 5261 formed in the first hinge ball 526. Meanwhile, the two ends of the second connecting rod 5233 are respectively provided with second arc-shaped claws 529, one of which extends into the first installation slot 5261 of the first hinge ball 526 to achieve the movable connection of the first connecting rod 5232 and the second connecting rod 5233 together with the first arc-shaped claw 528; the other second arc-shaped claw 529 extends into two vertical and intersecting second installation slots 5262 formed in the second hinge ball 527, and the third arc-shaped claw 530 rotatably connected to the mounting member 525 extends into the second installation slot 5262 of the second hinge ball 527 to achieve the movable connection between the second connecting rod 5233 and the mounting member 525. Through this design, the first connecting rod 5232, the second connecting rod 5233 and the mounting member 525 can be flexibly transformed in angle, ensuring that the stabilizing wall unit 53 can closely fit the hole wall during the rotary drilling process, improving the construction quality and efficiency. Compared with the traditional connecting rod hinge connection mode, the hinge ball and arc-shaped claw connection design adopted by the present application has a significant advantage in degree of freedom. The traditional hinge connection can usually only realize rotation in a single direction, limiting the flexibility of the connection. In the present application, the vertical and intersecting installation slots on the first and second hinge balls 527 cooperate with the arc-shaped claws, so that the first connecting rod 5232 and the second connecting rod 5233, and the second connecting rod 5233 and the mounting member 525 can realize flexible rotation in multiple directions, greatly increasing the degree of freedom of the connection. Meanwhile, compared with the traditional ball hinge connection mode, the design of forming two first installation slots 5261 on the first hinge ball 526 and two second installation slots 5262 on the second hinge ball 527 makes the anti-shrinkage wall protection assembly 5 movable along the path of the first installation slot 5261 and the second installation slot 5262 during the rotary drilling process, better adapting to the changes of the hole wall, achieving further improvement of the stability and load-bearing capacity of the hole wall, and enhancing the support effect of the hole wall.

[0088] As a preferred embodiment, as shown in Figures 9 to 12 The rotary digging member 4 includes a drill cylinder 41 and a drill cover 42, the drill cover 42 is movably arranged at the bottom of the drill cylinder 41, and a plurality of breaking heads 43 are arranged on the drill cover 42; a collecting groove 44 is formed in the drill cover 42 and communicates with the inner cavity of the drill cylinder 41; the drill cover 42 is movably arranged at the bottom of the drill cylinder 41, and the breaking heads 43 arranged thereon are used for breaking soil, and in the rotary digging process, the broken soil enters the inner cavity of the drill cylinder 41 and is collected by the collecting groove 44.

[0089] The first lever 411, the second lever 412 and the connecting hook 413 are arranged in the drill cylinder 41, the connecting block 414 is arranged on the drill cover 42, and the connecting hook 413 and the connecting block 414 can be connected or separated; one end of the first lever 411 is hinged to the top of the drill cylinder 41, the other end of the first lever 411 is hinged to one end of the second lever 412, the other end of the second lever 412 is hinged to the connecting hook 413, the middle part of the connecting hook 413 is hinged to the drill cylinder 41, and the first push rod 45 is arranged on the first lever 411 and used to drive the connecting hook 413 to change the angle. When the excavating part 4 is in the process of drilling downward, the excavated soil in the collecting groove 44 reaches a preset amount, the hydraulic cylinder drives the excavating part 4 to be lifted upward, the excavating part 4 is pulled out of the hole, the first push rod 45 is pushed downward, the first lever 411 and the second lever 412 are linked, the angle of the connecting hook 413 is changed, and then the connecting hook 413 is separated from the connecting block 414 on the drill cover 42, at this time, the drill cover 42 is opened relative to the drill cylinder 41, the soil in the collecting groove 44 is poured out, after the soil is poured out, the drill cover 42 is closed, and the excavating part 4 continues to be deep into the hole for excavating operation, and the crushing head 43 on the excavating part 4 can efficiently crush the soil.

[0090] As a preferred embodiment, as shown in Figures 10 to 12 The mounting ring 511 is fixedly arranged in the wall cylinder 51, the driving part 512 is arranged on the mounting ring 511 and used to drive the sliding rod 5231 to ascend or descend and / or drive the first push rod 45 to ascend or descend.

[0091] In an embodiment, as shown in Figure 11 The first hinged rod 5311 is hinged to the top of the sliding rod 5231, the second hinged rod 5312 is hinged to the first hinged rod 5311, the middle part of the first hinged rod 5311 is provided with the fixed strip 5313, the first hinged rod 5311 is rotationally connected with the fixed strip 5313, the fixed strip 5313 is fixed in the wall cylinder 51, the second push rod 5314 is connected with the second hinged rod 5312, and the second push rod 5314 is connected with the driving part 512. In the embodiment, the driving part 512 is preferably a pneumatic cylinder. When the driving part 512 works, the second push rod 5314 moves up and down, the second hinged rod 5312 moves, the angle of the first hinged rod 5311 rotates, the sliding rod 5231 finally moves up and down, the angle changing assembly 523 is acted on when the sliding rod 5231 moves up and down, the wall stabilizing unit 53 is periodically changed, the wall stabilizing unit 53 better contacts the hole wall, and the phenomenon of hole shrinkage is avoided.

[0092] In an embodiment, as shown in Figure 12As shown, the driving member 512 is mounted on the mounting ring 511, and the output end of the driving member 512 penetrates the mounting ring 511 and is connected with the slide rod 5231. The driving member 512 drives the slide rod 5231 to move up and down, and the structure is simple and compact.

[0093] In an embodiment, as shown in Figure 10 As shown, the top of the slide rod 5231 is hingedly connected with a first hinged rod 5311, the first hinged rod 5311 is hingedly connected with a second hinged rod 5312, the middle part of the first hinged rod 5311 is provided with a fixed strip 5313, the first hinged rod 5311 is rotationally connected with the fixed strip 5313, the fixed strip 5313 is fixed in the inner part of the wall cylinder 51, the second hinged rod 5312 is connected with the first pushing rod 45, and the first pushing rod 45 is connected with the driving member 512. In this embodiment, the driving member 512 has a dual function, one is to drive the slide rod 5231 to move up and down to adjust the angle of the anti-shrinkage protection wall assembly 5, and the other is to drive the first pushing rod 45 to move up and down to control the opening and closing of the drill cover 42 of the rotary digging member 4. On the one hand, it can drive the slide rod 5231 to move up and down, so that the anti-shrinkage protection wall assembly 5 is attached to the hole wall, effectively preventing the shrinkage phenomenon and avoiding the shrinkage. On the other hand, the driving member 512 can drive the first pushing rod 45 to control the opening and closing of the drill cover 42 of the rotary digging member 4, realize the soil excavation, collection and treatment, the integrated design simplifies the structure, reduces the cost, improves the operation convenience and work efficiency of the equipment, and brings convenience for rotary drilling construction.

[0094] As a preferred embodiment, the wall stabilizing unit 53 comprises a column rod 531, a drill strip and two mounting seats 533 fixed at both ends of the column rod 531, the two mounting seats 533 are connected with the mounting member 525, the column rod 531 is provided with a first mounting strip 534, a second mounting strip 535 and a third mounting strip 536 between the column rod 531 and the wall stabilizing drill piece 532, the first mounting strip 534 and the second mounting strip 535 are arranged in parallel, a sleeve ring 537 is slidably arranged on the column rod 531, and a tension spring is arranged between the sleeve ring 537 and one of the mounting seats 533; one end of the third mounting strip 536 is hingedly connected with the sleeve ring 537, and the other end of the third mounting strip 536 is hingedly connected with the middle part of the second mounting strip 535. According to the above technical scheme, the wall stabilizing unit 53 is stably connected with the mounting member 525 through the mounting seat 533, the sleeve ring 537 slidably arranged on the column rod 531 is under the action of the tension spring, so that the wall stabilizing unit 53 has a contraction trend as a whole, and when the rotary drilling equipment starts to work, the wall stabilizing unit 53 rotates with the drill rod. During the rotation, the wall stabilizing unit 53 expands outward and tightly contacts with the hole wall due to the centrifugal force; at this time, the first and second mounting strips 535 between the column rod 531 and the wall stabilizing drill piece 532 provide stable support, and the third mounting strip 536 allows the wall stabilizing unit 53 to be moderately opened under the action of the centrifugal force through the hinged relationship.

[0095] It should be noted that during the rotation process, the centrifugal force generated during the rotation process needs to be greater than the tension of the tension spring.

[0096] The contact of the wall stabilizing unit 53 with the hole wall further improves the density of the hole wall through friction, that is, the combination between soil particles is more compact. This design not only enhances the strength and stability of the hole wall, but also effectively prevents the collapse of the hole wall during drilling, thereby improving the accuracy and efficiency of the rotary drilling.

[0097] As a preferred embodiment, the wall stabilizing drill bit 532 has a wave-shaped structure. During the contact with the hole wall, the wall stabilizing drill bit 532 with the wave-shaped structure can generate a certain flow disturbance effect, which reduces the surface temperature of the wall stabilizing drill bit 532 and avoids the accumulation of mud and debris on the hole wall. Moreover, the wave-shaped structure design is more in line with air flow science, which helps to reduce vibration and noise during friction with the hole wall to some extent, thereby improving the stability of the hole wall.

[0098] Preparation step: connecting the rotary drilling machine 1, the rotary drilling structure 2, and the rotating shaft 3. The rotary drilling machine 1 can drive the rotary drilling structure 2 to rotate and / or lift for operation through the rotating shaft 3.

[0099] Initial position setting step: aligning the rotary drilling part 4 of the rotary drilling structure 2 with the position to be drilled, and ensuring that the wall stabilizing unit 53 of the anti-shrinkage and protection wall assembly 5 can extend into the hole to be drilled in the contracted state.

[0100] Drilling start step: starting the rotary drilling machine 1, driving the rotary drilling structure 2 to rotate and lift as a whole through the rotating shaft 3, and driving the rotary drilling part 4 to start drilling the hole while injecting grout into the hole to balance the pressure in the hole and further improve the stability of the inner wall of the hole.

[0101] Anti-shrinkage and protection wall assembly expansion step: during the rotary drilling process, as the rotary drilling structure 2 rotates, the wall stabilizing unit 53 of the anti-shrinkage and protection wall assembly 5 changes from the contracted state to the expanded state under the action of the centrifugal force, and tightly contacts with the hole wall to support and stabilize the hole wall.

[0102] Adjustment step: driving the slide rod 5231 to periodically slide axially along the sleeve 522 through the driving member 512 provided on the rotary drilling machine 1, and then continuously adjusting the angle of the mounting member 525 through the angle conversion assembly 523, so as to switch the wall stabilizing unit 53 between the first state and the second state, thereby enhancing the stability of the hole wall.

[0103] Soil collection and processing step: the soil collected by the rotary drilling part 4 during the drilling process is collected through the collection groove 44 thereon. When the soil in the collection groove 44 reaches a preset amount, the drill cover 42 is opened by driving the first push rod 45 through the driving member 512, the soil is poured out, and then the drill cover 42 is closed for continuous rotary drilling operation.

[0104] Drilling completion step: when the hole reaches the predetermined depth and diameter, the rotary drilling machine operation is stopped, the rotary drilling structure 2 is lifted out of the hole, and the drilling operation is completed.

[0105] The above embodiments are only preferred embodiments of the present application for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A rotary drilling construction device, characterized in that, include: A rotary drilling rig (1) and a rotary drilling structure (2), wherein a rotating shaft (3) is rotatably connected to the rotary drilling rig (1), the rotating shaft (3) is connected to the rotary drilling structure (2), and the rotary drilling rig (1) can drive the rotary drilling structure (2) to rotate and / or lift through the rotating shaft (3); The rotary drilling structure (2) includes a rotary drilling component (4) and a shrinkage protection wall assembly (5) fixed on the rotary drilling component (4). The anti-shrinkage wall protection assembly (5) includes a wall cylinder (51), a drive unit (52) disposed inside the wall cylinder (51), and at least two wall stabilizing units (53). One end of the wall cylinder (51) is connected to the rotating shaft (3), and the other end is connected to the rotary drilling component (4). Each of the wall stabilizing units (53) is evenly distributed around the outer periphery of the wall cylinder (51) and connected to the driving unit (52). The driving unit (52) is used to drive the wall stabilizing units (53) to change their position and angle. The wall stabilizing unit (53) has a contracted state and an expanded state. When the wall cylinder (51) rotates, the wall stabilizing unit (53) tends to expand outward. When the wall stabilizing unit (53) is in a contracted state, the projection formed by the enclosed wall stabilizing unit (53) is smaller than the diameter of the rotary drilling component (4). When the rotary drilling structure (2) rotates, the projection formed by the enclosed wall stabilizing unit (53) is greater than or equal to the diameter of the rotary drilling component (4). The driving unit (52) includes a fixing ring (521), a sleeve (522), and an angle transformation component (523). The fixing ring (521) is fixedly disposed inside the wall cylinder (51). The sleeve (522) is fixed on the fixing ring (521). A plurality of support rods (524) are fixedly connected to the outer periphery of the sleeve (522). Each support rod (524) is movably connected to an installation component (525). The installation component (525) has a first state and a second state. Each wall stabilizing unit (53) is fixedly disposed on a corresponding installation component (525). The angle transformation component (523) is connected to the installation component (525) and is used to drive the state of the installation component (525) to change. The angle transformation component (523) includes a slide rod (5231), a first connecting rod (5232), and a second connecting rod (5233). There are multiple first connecting rods (5232) and second connecting rods (5233). Each first connecting rod (5232) is fixedly connected to the end of the slide rod (5231). The first connecting rod (5232) is movably connected to the corresponding second connecting rod (5233). The second connecting rod (5233) is movably connected to the mounting component (525). The slide bar (5231) can slide along the axial direction of the sleeve (522) to drive the mounting component (525) from a first state to a second state, or from a second state to a first state.

2. The rotary drilling equipment according to claim 1, characterized in that: A first hinge ball (526) is provided between the first connecting rod (5232) and the second connecting rod (5233), and two first mounting grooves (5261) are provided on the first hinge ball (526), ​​which are perpendicular and intersecting each other; a second hinge ball (527) is provided between the second connecting rod (5233) and the mounting member (525), and two second mounting grooves (5262) ​​are provided on the second hinge ball (527), which are perpendicular and intersecting each other; The first connecting rod (5232) is provided with a first arc-shaped claw (528) at its end, and the second connecting rod (5233) is provided with a second arc-shaped claw (529) at both ends. A third arc-shaped claw (530) is rotatably connected to the mounting member (525). The first arc-shaped claw (528) and one of the second arc-shaped claws (529) extend into the two corresponding first mounting slots (5261), and the other second arc-shaped claw (529) and the third arc-shaped claw (530) extend into the two corresponding second mounting slots (5262).

3. The rotary drilling equipment according to claim 2, characterized in that: The rotary drilling component (4) includes a drill barrel (41) and a drill cover (42). The drill cover (42) is detachably disposed at the bottom of the drill barrel (41), and a plurality of breaking heads (43) are disposed on the drill cover (42). The drill cover (42) is provided with a collection groove (44) that communicates with the inner cavity of the drill barrel (41). The drill barrel (41) is provided with a first rod (411), a second rod (412) and a connecting hook (413), and the drill cover (42) is provided with a connecting block (414). The connecting hook (413) and the connecting block (414) can be connected to or disconnected from each other. One end of the first rod (411) is hinged to the top of the drill barrel (41), the other end of the first rod (411) is hinged to one end of the second rod (412), the other end of the second rod (412) is hinged to the connecting hook (413), the middle part of the connecting hook (413) is hinged to the drill barrel (41), and a first push rod (45) is provided on the first rod (411). The first push rod (45) is used to drive the angle of the connecting hook (413) to change.

4. The rotary drilling equipment according to claim 3, characterized in that: An installation ring (511) is fixedly disposed inside the wall cylinder (51), and a driving component (512) is disposed on the installation ring (511). The driving component (512) is used to drive the slide rod (5231) to rise or fall; and / or, Drive the first push rod (45) to rise or fall.

5. The rotary drilling equipment according to claim 4, characterized in that: The top of the slide bar (5231) is hinged to a first hinge bar (5311), and a second hinge bar (5312) is hinged to the first hinge bar (5311). A fixing bar (5313) is provided in the middle of the first hinge bar (5311). The first hinge bar (5311) is rotatably connected to the fixing bar (5313). The fixing bar (5313) is fixed inside the wall cylinder (51). A second push rod (5314) is connected to the second hinge bar (5312). The second push rod (5314) is connected to the drive member (512).

6. The rotary drilling equipment according to claim 5, characterized in that: The top of the slide bar (5231) is hinged to a first hinge bar (5311), and a second hinge bar (5312) is hinged to the first hinge bar (5311). A fixing bar (5313) is provided in the middle of the first hinge bar (5311). The first hinge bar (5311) is rotatably connected to the fixing bar (5313). The fixing bar (5313) is fixed inside the wall cylinder (51). The second hinge bar (5312) is connected to the first push rod (45). The first push rod (45) is connected to the drive member (512).

7. The rotary drilling equipment according to claim 6, characterized in that: The wall stabilizing unit (53) includes a column (531), a wall stabilizing drill bit (532), and mounting seats (533) fixed at both ends of the column (531). The two mounting seats (533) are connected to the mounting component (525). A first mounting strip (534), a second mounting strip (535), and a third mounting strip (536) are provided between the column (531) and the wall stabilizing drill bit (532). The first mounting strip (534) and the second mounting strip (535) are arranged in parallel. A collar (537) is slidably provided on the column (531). A tension spring (538) is provided between the collar (537) and one of the mounting seats (533). One end of the third mounting strip (536) is hinged to the collar (537), and the other end of the third mounting strip (536) is hinged to the middle position of the second mounting strip (535). The wall-stabilizing drill bit (532) has a wavy structure.

8. A rotary drilling construction method, characterized in that: Including the rotary drilling equipment as described in any one of claims 1-7, the method further includes the following steps: Preparation steps: Connect the rotary drilling machine (1), the rotary drilling structure (2) and the rotating shaft (3), align the rotary drilling part (4) of the rotary drilling structure (2) with the position of the hole to be drilled, and ensure that the wall stabilizing unit (53) of the anti-shrinkage wall protection assembly (5) can extend into the hole to be drilled in the retracted state; Drilling start-up steps: Start the rotary drilling machine (1), drive the rotary drilling structure (2) to rotate and lift as a whole through the rotating shaft (3), drive the rotary drilling component (4) to start rotary drilling the hole, and inject grout into the hole at the same time; During the rotary drilling process, as the rotary drilling structure (2) rotates, the wall stabilizing unit (53) of the anti-shrinkage wall protection component (5) changes from a contracted state to an expanded state under the action of centrifugal force, and comes into close contact with the hole wall to support and stabilize the hole wall. Adjustment steps: Drive the slide bar (5231) periodically along the sleeve (522) by the drive component (512) set on the rotary drilling machine (1), and then continuously adjust the angle of the mounting component (525) through the angle transformation component (523) so that the wall stabilizing unit (53) switches between the first state and the second state; Soil collection and treatment steps: The soil collected by the rotary drilling component (4) during the drilling process is collected through the collection trough (44) on it. When the soil in the collection trough (44) reaches the preset amount, the rotary drilling component (4) is lifted up, and the first push rod (45) is driven by the drive component (512) to open the drill cover (42). After dumping the soil, the drill cover (42) is closed and the rotary drilling operation continues. Drilling completion steps: When the hole reaches the predetermined depth and diameter, stop the rotary drilling machine (1) and lift the rotary drilling structure (2) out of the hole to complete the drilling operation.

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