Intelligent hard rock identification method in drilling process of super-long socketed pile

Abstract

The invention provides an intelligent hard rock identification method in the drilling process of an ultra-long socketed pile, and belongs to the technical field of rotary drilling rigs. Comprising a rotary drilling rig body, a rotary drilling bit body is installed at the bottom of the rotary drilling rig body, a spring body is installed at the bottom of the rotary drilling rig body, and a bottom plate is installed at the bottom of the rotary drilling bit body; and the cooling liquid conveying mechanism is used for conveying cooling liquid to the bottom plate from the outside of the rotary drilling bit body, and the cooling liquid conveying mechanism is connected with the rotary drilling rig body. By arranging the cooling liquid conveying mechanism, cooling liquid can be conveyed to the position of the drill bit on the bottom plate, rapid cooling of the rotary excavating drill bit is achieved, meanwhile, the cooling liquid conveying mechanism can keep the circulation state of the cooling liquid, continuity of the cooling effect is ensured, and therefore the safety of the rotary excavating drill bit in the drilling process is further guaranteed; the supporting and protecting mechanism can support and protect the middle of the bottom plate.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary drilling rigs, and in particular to a hard rock intelligent identification method during the drilling process of an ultra-long rock-socketed pile. Background Art

[0002] The rotary drilling rig is the most widely used construction equipment in foundation drilling operations in municipal construction, highway bridges, high-rise buildings, etc. During the use of the rotary drilling rig, the soil hardness needs to be monitored in real time to control the rotary drilling method. Because the rotary drilling bit is easily damaged when encountering the hard rock layer, the risk of damage to the rotary drilling bit can be effectively reduced through monitoring and regulation.

[0003] In clay or hard soil layers, rotary drilling rigs face many problems when operating. First, the drill cuttings are easily compacted, resulting in the drill cuttings being too tight after the drill bucket is full, making it difficult to discharge the drill cuttings in the drill bucket, which seriously affects work efficiency. Secondly, in hard rock layers, due to the high hardness of the formation, a large amount of heat will be generated when the rotary drill bit contacts and rubs against it. If the drill bit is not cooled in time, the drill bit will be more susceptible to damage under high heat conditions, thereby shortening the service life of the drill bit and increasing construction costs. Therefore, this application provides a method for intelligently identifying hard rock during the drilling process of ultra-long rock-embedded piles to meet the needs. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles. By setting a coolant delivery mechanism, the coolant can be delivered to the drill bit on the bottom plate, thereby achieving rapid cooling of the rotary drill bit. At the same time, the mechanism can also maintain the circulation state of the coolant to ensure the continuity of the cooling effect, thereby further ensuring the safety of the rotary drill bit during the drilling process. The above settings can solve the problem that the rotary drill bit is easily damaged by overheating.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0006] A method for intelligently identifying hard rock during the drilling process of an ultra-long rock-socketed pile comprises the following steps:

[0007] Step 1: Drilling rig and drill bit selection and initial operation: Select a rotary drilling rig based on the formation conditions and equip it with a drill bit suitable for hard rock drilling. Operate the rotary drilling rig, touch the drill bit to the ground, and perform a zero reset operation using the zero button on the display to record the original position of the drill bit.

[0008] Step 2: Drilling parameter adjustment and data collection: In soft and hard alternating formations, rotary drills use light pressure and slow rotation, while percussion drills use low hammer and frequent strikes. When drilling in hard rock, a staged hole enlargement drilling scheme is adopted: first drill and coring with a small drill bit to create a free surface, then gradually replace with a larger drill bit to enlarge the hole;

[0009] During the drilling process, the monitoring function of the drilling rig itself and the sensors on the drill pipe end section are used to collect drilling parameter data such as drilling speed, jacking force, drill pipe speed, drill pipe torque, and temperature and humidity. The main characteristics of the formation lithology and geological structure are extracted from the pre-processed drilling parameter data, and the relationship curves between drilling speed, jacking force, drill pipe speed, drill pipe torque and temperature and humidity are established. Based on the existing geological exploration data, formation models for different formations are established. Based on the drilling parameters and formation models of different formations, a feature and parameter mapping set of different formation lithology and geological structures is established. The feedforward neural network method is used to intelligently identify the lithology and geological structure of different formations.

[0010] Step 3: Check and correct the verticality of the drill pipe: When the rotary drill is being raised and lowered, observe the smoothness of the drill pipe. Use a plumb bob or theodolite to check the verticality of the active drill pipe twice or more per shift. If the hole is tilted, adjust it in time. With the percussion drill, check the relative consistency of the wire rope and the center of the casing in real time. If any deviation is found, correct the tilt with a low hammer and slow strike.

[0011] Step 4: Drilling debris cleaning: When the drill bucket is squeezed and filled with drilling debris, lift it out of the ground, operate the rotary operating handle to turn the machine to the position of the earthmoving truck, and use the loader to load the drilling debris into the earthmoving truck;

[0012] Step 5. Use mud and reset the equipment: Select high-quality mud suitable for the soil layer and keep the water head height in the hole 0.5 to 1.0 m higher than the underground static water level. After the drilling operation is completed, press the automatic return button on the operating display to make the machine automatically return to the drilling operation position.

[0013] Optionally, the rotary drilling rig includes a rotary drilling rig body, a rotary drilling bit body is installed at the bottom of the rotary drilling rig body, a spring body is installed at the bottom of the rotary drilling rig body, and a base plate is installed at the bottom of the rotary drilling bit body; a coolant delivery mechanism, the coolant delivery mechanism is used to deliver coolant from the outside of the rotary drilling bit body to the base plate, and the coolant delivery mechanism is connected to the rotary drilling rig body; a support and protection mechanism, the support and protection mechanism is used to protect the coolant delivery mechanism and to assist in supporting the base plate, and the support and protection mechanism is connected to the rotary drilling bit body.

[0014] Optionally, the coolant delivery mechanism includes an input pipe installed at the bottom of the rotary drilling rig body, an output pipe is installed at the bottom of the rotary drilling rig body, and connecting pipes are installed at the bottom ends of the input pipe and the output pipe.

[0015] Optionally, outer walls of the input pipe and the output pipe are covered with a heat-insulating sleeve, and a support rod is inserted into the heat-insulating sleeve.

[0016] Optionally, the support and protection mechanism includes a top plate installed in the rotary drilling bit body, the bottom ring of the top plate is equidistantly provided with a first connecting plate, the bottom ring of the top plate is equidistantly provided with a second connecting plate, and the bottom ring of the top plate is equidistantly provided with a third connecting plate.

[0017] Optionally, a limiting portion is provided at the bottom of the first connecting piece, the first connecting piece is made of stainless steel, and a first weakened portion is provided on the first connecting piece.

[0018] Optionally, the outer wall of the second connecting piece is provided with connecting blocks at equal intervals in an annular shape, the second connecting piece and the connecting blocks are integrally formed, and both the second connecting piece and the connecting blocks are made of stainless steel.

[0019] Optionally, the third connecting piece is made of nylon, and the second connecting piece, the first connecting piece and the third connecting piece are all arc-shaped structures protruding away from the center of the rotary drill bit body.

[0020] Optionally, a convex portion is provided on a side of the connecting block away from the second connecting piece, a buffer cavity is provided on a side of the connecting block close to the second connecting piece, and a second weakened portion is provided on the second connecting piece.

[0021] Optionally, the bottoms of the second connecting piece and the third connecting piece are fixedly connected to a bottom plate, segmented grooves are equidistantly provided in an annular shape on the bottom plate, and the bottom plate is an arc-shaped structure protruding toward the bottom plate.

[0022] Compared with the prior art, the present invention has at least the following beneficial effects:

[0023] In the above scheme, by setting up a coolant delivery mechanism, the coolant can be delivered to the drill bit on the bottom plate, thereby achieving rapid cooling of the rotary drilling bit. At the same time, the mechanism can also maintain the circulation state of the coolant to ensure the continuity of the cooling effect, thereby further ensuring the safety of the rotary drilling bit during the drilling process. In addition, the support and protection mechanism can not only provide support and protection for the middle part of the bottom plate, but also protect the coolant delivery mechanism. By cooperating with the bottom plate, the support and protection mechanism can also assist the rotary drilling device to quickly discharge the drill cuttings in the drill bucket, effectively improving the working efficiency of the rotary drilling.

[0024] By arranging an input pipe, an output pipe and a connecting pipe in the coolant delivery mechanism, a coolant storage tank and a circulation pump are installed on the top of the input pipe and the output pipe. The coolant is delivered to the connecting pipe through the input pipe in conjunction with the coolant storage tank and the circulation pump. The coolant in the connecting pipe contacts the bottom of the drill bit and absorbs the heat on the drill bit. Subsequently, the coolant circulates in the connecting pipe for one cycle and is transported back to the coolant storage tank through the output pipe. Through the circulation system, the coolant can continuously cool the rotary drill bit, thereby ensuring the safety of the drill bit and the entire device.

[0025] By arranging support rods and insulation sleeves in the coolant delivery mechanism, the support rods are used to support and guide the input pipe and the output pipe and separate them, thereby blocking the heat transfer between the input pipe and the output pipe. During the coolant delivery process, the insulation sleeve insulates the pipe of the input pipe, reduces heat loss during the delivery process, and further ensures the cooling effect.

[0026] By arranging the first connecting piece, the second connecting piece and the third connecting piece in the support and protection mechanism, multi-layer protection is formed for the insulation sleeve, the input pipe, the output pipe and the support rod to prevent them from excessive bending under the action of external force, thereby avoiding affecting the transportation of coolant inside the input pipe and the output pipe. At the same time, the first connecting piece, the second connecting piece and the third connecting piece form a support column at the top center position of the base plate, which plays an auxiliary supporting role for the base plate and further enhances the stability of the base plate, which makes the base plate less likely to be deformed and damaged when encountering hard rock layers. In addition, the first connecting piece, the second connecting piece and the third connecting piece can also produce a certain elastic deformation when subjected to strong extrusion pressure, and further cooperate with the spring body to play a buffering role on the rotary drilling bit body and the base plate, thereby protecting the drill bit on the base plate to a greater extent.

[0027] By providing a connecting block in the supporting and protecting mechanism, during the slag discharge process, when the bottom plate is opened, the squeezing force of the bottom plate on the first connecting piece and the second connecting piece disappears, and the first connecting piece and the second connecting piece recover their elastic deformation. Since the interior of the rotary drilling bit body is already full of drill cuttings at this time, the restorative elastic force of the first connecting piece and the second connecting piece will cause the first connecting piece and the second connecting piece to deform, thereby changing the spatial structure inside the rotary drilling bit body, making it easier to discharge the drill cuttings. At the same time, by utilizing the connecting block on the second connecting piece, during the deformation process of the second connecting piece, the displacement of the connecting block will push the drill cuttings on the inner wall of the rotary drilling bit body, further promoting the discharge of drill cuttings.

[0028] To sum up, this device can not only increase the safety of the drill bit through the coordinated use of the coolant delivery mechanism, the support and protection mechanism and the various components therein, but also make the device quickly discharge slag, effectively increasing the working efficiency of the rotary drilling rig. In addition, the structure of this device is simple, and it is convenient and quick to use. The production cost of the device is low, the practicality is good, and it is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0030] Figure 1 This is a schematic diagram of the three-dimensional structure of the rotary drilling rig body;

[0031] Figure 2 This is a schematic diagram of the cross-sectional structure of the rotary drilling rig body and the rotary drilling bit body;

[0032] Figure 3 for Figure 2 A in the middle is an enlarged structural diagram;

[0033] Figure 4 This is a schematic diagram of the cross-sectional structure of the rotary drill bit body;

[0034] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0035] Figure 6 This is a schematic diagram of the three-dimensional enlarged structure of the input pipe and the insulation sleeve;

[0036] Figure 7 This is a schematic diagram of the three-dimensional enlarged structure of the input and output tubes;

[0037] Figure 8 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotary drill bit body from the first perspective;

[0038] Figure 9 This is a schematic diagram of an enlarged structure of the first connecting piece and the second connecting piece being three-dimensionally unfolded;

[0039] Figure 10 for Figure 9 The enlarged structural diagram at C in the middle;

[0040] Figure 11 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotary drill bit body from a second viewing angle;

[0041] Figure 12 for Figure 11 Enlarged structural diagram at point D in the middle.

[0042] Reference numerals:

[0043] 1. Rotary drilling rig body; 2. Rotary drilling bit body; 3. Spring body; 4. Bottom plate; 5. Insulation sleeve; 6. Input pipe; 7. Output pipe; 8. Connecting pipe; 9. Support rod; 10. First connecting piece; 11. Limiting part; 12. Second connecting piece; 13. Connecting block; 14. Third connecting piece; 15. Protrusion; 16. Buffer cavity; 17. Bottom piece; 18. Segmented groove; 19. Top piece; 20. First weakened part; 21. Second weakened part.

[0044] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0045] The following describes in detail, with reference to the accompanying drawings and specific embodiments, a method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles provided by the present invention. It is also noted that, for the sake of completeness, the following embodiments are optimal and preferred embodiments, and those skilled in the art may employ alternative implementations for known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0046] It should be noted that references in the specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment includes such specific features, structures, or characteristics. In addition, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments, regardless of whether such features, structures, or characteristics are explicitly described.

[0047] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0048] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0049] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0050] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a method for intelligently identifying hard rock during the drilling process of an ultra-long rock-socketed pile, comprising the following steps:

[0051] Step 1: Drilling rig and drill bit selection and initial operation: Select a rotary drilling rig based on the formation conditions and equip it with a drill bit suitable for hard rock drilling. Operate the rotary drilling rig, touch the drill bit to the ground, and perform a zero reset operation using the zero button on the display to record the original position of the drill bit.

[0052] Step 2: Drilling parameter adjustment and data collection: In soft and hard alternating formations, rotary drills use light pressure and slow rotation, while percussion drills use low hammer and frequent strikes. When drilling in hard rock, a staged hole enlargement drilling scheme is adopted: first drill and coring with a small drill bit to create a free surface, then gradually replace with a larger drill bit to enlarge the hole;

[0053] During the drilling process, the monitoring function of the drilling rig itself and the sensors on the drill pipe end section are used to collect drilling parameter data such as drilling speed, jacking force, drill pipe speed, drill pipe torque, and temperature and humidity. The main characteristics of the formation lithology and geological structure are extracted from the pre-processed drilling parameter data, and the relationship curves between drilling speed, jacking force, drill pipe speed, drill pipe torque and temperature and humidity are established. Based on the existing geological exploration data, formation models for different formations are established. Based on the drilling parameters and formation models of different formations, a feature and parameter mapping set of different formation lithology and geological structures is established. The feedforward neural network method is used to intelligently identify the lithology and geological structure of different formations.

[0054] Step 3: Check and correct the verticality of the drill pipe: When the rotary drill is being raised and lowered, observe the smoothness of the drill pipe. Use a plumb bob or theodolite to check the verticality of the active drill pipe twice or more per shift. If the hole is tilted, adjust it in time. With the percussion drill, check the relative consistency of the wire rope and the center of the casing in real time. If any deviation is found, correct the tilt with a low hammer and slow strike.

[0055] Step 4: Drilling debris cleaning: When the drill bucket is squeezed and filled with drilling debris, lift it out of the ground, operate the rotary operating handle to turn the machine to the position of the earthmoving truck, and use the loader to load the drilling debris into the earthmoving truck;

[0056] Step 5. Use mud and reset the equipment: Select high-quality mud suitable for the soil layer and keep the water head height in the hole 0.5 to 1.0 m higher than the underground static water level. After the drilling operation is completed, press the automatic return button on the operating display to make the machine automatically return to the drilling operation position.

[0057] In this embodiment, if Figures 1 to 3 As shown, in step one, the rotary drilling rig includes a rotary drilling rig body 1, a rotary drilling bit body 2 is installed at the bottom of the rotary drilling rig body 1, a spring body 3 is installed at the bottom of the rotary drilling rig body 1, and a bottom plate 4 is installed at the bottom of the rotary drilling bit body 2; a coolant delivery mechanism, the coolant delivery mechanism is used to deliver coolant from the outside of the rotary drilling bit body 2 to the bottom plate 4, and the coolant delivery mechanism is connected to the rotary drilling rig body 1; a support and protection mechanism, the support and protection mechanism is used to protect the coolant delivery mechanism and to assist in supporting the bottom plate 4, and the support and protection mechanism is connected to the rotary drilling bit body 2. The rotary drilling rig body 1, the rotary drilling bit body 2, the spring body 3 and the bottom plate 4 are all existing mature technologies, so their working principle and specific structure will not be described in detail here. During the use of the rotary drilling rig, the coolant delivery mechanism can deliver coolant to the drill bit on the bottom plate 4, thereby achieving rapid cooling of the rotary drilling bit. At the same time, this mechanism maintains the coolant's circulation, ensuring a continuous cooling effect, further safeguarding the drill bit's safety during drilling. Furthermore, the support and protection mechanism not only supports and protects the central portion of the base plate 4 but also protects the coolant delivery mechanism. In conjunction with the base plate 4, the support and protection mechanism also assists the rotary drilling device in rapidly discharging drill cuttings from the drill bucket, effectively improving drilling efficiency.

[0058] like Figure 2 、 Figure 3 、 Figure 6 and Figure 7As shown, the coolant delivery mechanism includes an input pipe 6 installed at the bottom of the rotary drilling rig body 1, an output pipe 7 is installed at the bottom of the rotary drilling rig body 1, and a connecting pipe 8 is installed at the bottom ends of the input pipe 6 and the output pipe 7. The outer walls of the input pipe 6 and the output pipe 7 are provided with an insulation sleeve 5, and a support rod 9 is inserted into the insulation sleeve 5. In the cooling system of the rotary drilling rig, the support rod 9 is used to support and guide the input pipe 6 and the output pipe 7 and separate them, thereby blocking the heat transfer between the input pipe 6 and the output pipe 7. The input pipe 6 and the output pipe 7 are in a parallel state, and the shape of the connecting pipe 8 matches the distribution shape of the bottom of the drill bit. In actual application, a coolant storage tank and a circulation pump are installed on the top of the input pipe 6 and the output pipe 7. These devices are mature existing technologies, and their working principles and specific structures will not be repeated here.

[0059] Coolant is delivered to the connecting pipe 8 via the input pipe 6, a coolant storage tank, and a circulating pump. The coolant in the connecting pipe 8 contacts the bottom of the drill bit, absorbing heat from the drill bit. After circulating through the connecting pipe 8, the coolant is returned to the coolant storage tank via the output pipe 7. This circulation system continuously cools the drill bit, ensuring the safety of the drill bit and the entire system. During the coolant delivery process, the insulating sleeve 5 insulates the input pipe 6, reducing heat loss during the delivery process and further ensuring the cooling effect.

[0060] like Figures 3 to 5 and Figures 8 to 12As shown, the support and protection mechanism includes a top plate 19 installed within the rotary drill bit body 2. A first connecting plate 10 is equidistantly arranged in an annular pattern around the bottom of the top plate 19. A second connecting plate 12 is equidistantly arranged in an annular pattern around the bottom of the top plate 19. A third connecting plate 14 is equidistantly arranged in an annular pattern around the bottom of the top plate 19. The top of the top plate 19 is fixedly connected to the top of the rotary drill bit body 2, and the outer walls of the second connecting plate 12 are fixedly connected to the outer walls of the third connecting plate 14. Multiple second connecting plates 12 and third connecting plates 14 form a circumferential structure, with the first connecting plate 10 positioned within it, and the first connecting plates 10 and second connecting plates 12 are arranged in an alternating pattern. The insulation sleeve 5, input pipe 6, output pipe 7, and support rod 9 are all positioned between the multiple first connecting plates 10. The coordination of the first connecting plates 10, second connecting plates 12, and third connecting plates 14 provides multi-layered protection for the insulation sleeve 5, input pipe 6, output pipe 7, and support rod 9, preventing them from excessive bending under external forces, thereby preventing them from affecting the delivery of internal coolant. At the same time, the first, second, and third connecting pieces 10, 12, and 14 form a support column at the top center of the base plate 4, providing auxiliary support for the base plate 4 and further enhancing its stability. This makes the base plate 4 less susceptible to deformation and damage when encountering hard rock formations. Furthermore, the first, second, and third connecting pieces 10, 12, and 14 can undergo a certain degree of elastic deformation when subjected to strong compressive forces, further cooperating with the spring body 3 to provide a buffering effect between the rotary drill bit body 2 and the base plate 4, thereby further protecting the drill bit on the base plate 4.

[0061] Furthermore, the outer wall of the second connecting piece 12 is provided with connecting blocks 13 at equal intervals in an annular manner. The second connecting piece 12 and the connecting blocks 13 are integrally formed. The bottoms of the second connecting piece 12 and the third connecting piece 14 are fixedly connected to a bottom plate 17. When the bottom plate 4 is in a closed state and placed at the bottom of the rotary drill bit body 2, the bottom plate 4 exerts an extrusion effect on the first connecting piece 10 and the second connecting piece 12, causing the first connecting piece 10 and the second connecting piece 12 to undergo a certain degree of elastic deformation. The restorative force generated by this deformation causes the first connecting piece 10, the second connecting piece 12 and the bottom plate 17 at their bottom to press tightly against the inner wall of the bottom plate 4. During the slag discharge process, when the bottom plate 4 is opened, the extrusion force of the bottom plate 4 on the first connecting piece 10 and the second connecting piece 12 disappears, and the first connecting piece 10 and the second connecting piece 12 resume their elastic deformation. Since the interior of the rotary drill bit body 2 is already filled with drill cuttings, the restorative force of the first and second connecting pieces 10, 12 causes them to deform, thereby changing the spatial structure within the rotary drill bit body 2 and facilitating the removal of the drill cuttings. Simultaneously, the displacement of the connecting block 13 on the second connecting piece 12 during its deformation pushes the drill cuttings against the inner wall of the rotary drill bit body 2, further facilitating the removal of the drill cuttings.

[0062] like Figures 3 to 5and Figures 8 to 12 As shown, the bottom of the first connecting piece 10 is provided with a limiting portion 11, which can make the bottom of the first connecting piece 10 better fit with the bottom of the second connecting piece 12. The first connecting piece 10 is made of stainless steel, and the second connecting piece 12 and the connecting block 13 are all made of stainless steel. The stainless steel material has good stability and strong toughness. A first weakened portion 20 is provided on the first connecting piece 10, which makes the first connecting piece 10 more likely to deform under the action of external force, and first deforms from the first weakened portion 20. The third connecting piece 14 is made of nylon material, which has good toughness. The second connecting piece 12, the first connecting piece 10 and the third connecting piece 14 are all arc-shaped structures that bulge away from the center direction of the rotary drill bit body 2, which makes it easier for the second connecting piece 12, the first connecting piece 10 and the third connecting piece 14 to deform away from the center direction of the rotary drill bit body 2 under the action of external force, thereby avoiding the third connecting piece 14. When the second connecting piece 12, the first connecting piece 10 and the third connecting piece 14 are deformed, they affect the internal input pipe 6 and output pipe 7. A convex portion 15 is provided on the side of the connecting block 13 away from the second connecting piece 12, so that the multiple connecting blocks 13 are claw-shaped, making it easier to discharge the drill cuttings inside the rotary drill bit body 2. A buffer cavity 16 is provided on the side of the connecting block 13 close to the second connecting piece 12, so that the connecting block 13 can produce a certain buffer deformation under the action of external force, reducing the risk of damage to the connecting block 13. A second weakened portion 21 is provided on the second connecting piece 12, so that the second connecting piece 12 is more likely to deform, and under the action of external force, it first deforms from the second weakened portion 21. The bottom plate 17 is an arc-shaped structure convex toward the bottom plate 4. The bottom plate 17 is annularly equidistantly provided with segmented grooves 18, so that when the second connecting piece 12 and the first connecting piece 10 are deformed, the bottom plate 17 can cooperate to produce slight deformation.

[0063] The working principle of the technical solution provided by the present invention is as follows:

[0064] During use, in the cooling and protection system of the rotary drilling rig, the support rod 9 is responsible for supporting and guiding the input pipe 6 and the output pipe 7, and separating them, thereby blocking the transfer of heat between the input pipe 6 and the output pipe 7. A coolant storage tank and a circulation pump are installed on the top of the input pipe 6 and the output pipe 7. These devices are mature technologies, and their working principles and structures are not described here. The coolant is transported to the connecting pipe 8 through the input pipe 6, contacts the bottom of the drill bit and absorbs heat. Subsequently, the coolant circulates once in the connecting pipe 8 and returns to the coolant storage tank through the output pipe 7. The insulation sleeve 5 insulates the pipe of the input pipe 6, reduces the loss of heat during the transportation process, and ensures the cooling effect.

[0065] During the drilling process, the first, second, and third connecting pieces 10, 12, and 14 cooperate to form a multi-layered protection system for the insulation sleeve 5, input pipe 6, output pipe 7, and support rod 9, preventing them from excessive bending under external forces and ensuring smooth delivery of the coolant. Simultaneously, the first, second, and third connecting pieces 10, 12, and 14 form a support column at the top center of the base plate 4, enhancing the stability of the base plate 4 and making it less susceptible to deformation and damage when encountering hard rock formations. Furthermore, the first, second, and third connecting pieces 10, 12, and 14 elastically deform when subjected to strong compressive forces, cooperating with the spring body 3 to cushion the drill bit body 2 and base plate 4, further protecting the drill bit.

[0066] When the bottom plate 4 is in a closed state and placed at the bottom of the rotary drill bit body 2, the bottom plate 4 squeezes the first connecting piece 10 and the second connecting piece 12, causing them to undergo elastic deformation. The restorative force causes the first connecting piece 10, the second connecting piece 12 and the bottom piece 17 to press tightly against the inner wall of the bottom plate 4. During the slag discharge process, after the bottom plate 4 is opened, the first connecting piece 10 and the second connecting piece 12 resume their elastic deformation. The restorative force causes the first connecting piece 10 and the second connecting piece 12 to deform, changing the internal space structure of the rotary drill bit body 2 and making it easier to discharge the drill cuttings. At the same time, the connecting block 13 on the second connecting piece 12 displaces during the deformation process, pushing the drill cuttings on the inner wall of the rotary drill bit body 2, further promoting the discharge of the drill cuttings. Through the coordination of various structures, the practicality of the device is improved and the work efficiency is significantly improved.

[0067] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles, characterized in that: The following steps are involved: Step 1: Drilling rig and drill bit selection and initial operation: Select a rotary drilling rig based on the formation conditions and equip it with a drill bit suitable for hard rock drilling. Operate the rotary drilling rig, touch the drill bit to the ground, and perform a zero reset operation using the zero button on the display to record the original position of the drill bit. Step 2: Drilling parameter adjustment and data collection: In soft and hard alternating formations, rotary drills use light pressure and slow rotation, while percussion drills use low hammer and frequent strikes. When drilling in hard rock, a staged hole enlargement drilling scheme is adopted: first drill and coring with a small drill bit to create a free surface, then gradually replace with a larger drill bit to enlarge the hole; Step 3: Check and correct the verticality of the drill pipe: When the rotary drill is being raised and lowered, observe the smoothness of the drill pipe. Use a plumb bob or theodolite to check the verticality of the active drill pipe twice or more per shift. If the hole is tilted, adjust it in time. With the percussion drill, check the relative consistency of the wire rope and the center of the casing in real time. If any deviation is found, correct the tilt with a low hammer and slow strike. Step 4: Drilling debris cleaning: When the drill bucket is squeezed and filled with drilling debris, lift it out of the ground, operate the rotary operating handle to turn the machine to the position of the earthmoving truck, and use the loader to load the drilling debris into the earthmoving truck; Step 5. Use mud and reset the equipment: Select high-quality mud suitable for the soil layer and keep the water head height in the hole 0.5 to 1.0 m higher than the underground static water level. After the drilling operation is completed, press the automatic return button on the operating display to make the machine automatically return to the drilling operation position.

2. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 1, characterized in that: The rotary drilling rig includes a rotary drilling rig body, a rotary drilling bit body is installed at the bottom of the rotary drilling rig body, a spring body is installed at the bottom of the rotary drilling rig body, and a bottom plate is installed at the bottom of the rotary drilling bit body; A coolant delivery mechanism, the coolant delivery mechanism being used to deliver coolant from the outside of the rotary drill bit body to the bottom plate, the coolant delivery mechanism being connected to the rotary drill rig body; A support and protection mechanism is used to protect the coolant delivery mechanism and to provide auxiliary support to the base plate, and the support and protection mechanism is connected to the rotary drilling bit body.

3. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 2, characterized in that: The coolant delivery mechanism includes an input pipe installed at the bottom of the rotary drilling rig body, an output pipe is installed at the bottom of the rotary drilling rig body, and connecting pipes are installed at the bottom ends of the input pipe and the output pipe.

4. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 3 is characterized in that: The outer walls of the input pipe and the output pipe are covered with heat-insulating sleeves, and support rods are inserted into the heat-insulating sleeves.

5. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 2, characterized in that: The supporting and protecting mechanism includes a top plate installed in the rotary drilling bit body, the bottom ring of the top plate is equidistantly provided with a first connecting plate, the bottom ring of the top plate is equidistantly provided with a second connecting plate, and the bottom ring of the top plate is equidistantly provided with a third connecting plate.

6. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 5, characterized in that: A limiting portion is provided at the bottom of the first connecting piece. The first connecting piece is made of stainless steel. A first weakened portion is provided on the first connecting piece.

7. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 5, characterized in that: The outer wall of the second connecting piece is provided with connecting blocks at equal intervals in an annular manner. The second connecting piece and the connecting blocks are integrally formed. Both the second connecting piece and the connecting blocks are made of stainless steel.

8. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 5, characterized in that: The third connecting piece is made of nylon material, and the second connecting piece, the first connecting piece and the third connecting piece are all arc-shaped structures that protrude away from the center of the rotary drilling bit body.

9. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 5, characterized in that: A convex portion is provided on a side of the connecting block away from the second connecting piece, a buffer cavity is provided on a side of the connecting block close to the second connecting piece, and a second weakened portion is provided on the second connecting piece.

10. The method for intelligently identifying hard rock during the drilling process of ultra-long rock-socketed piles according to claim 5, characterized in that: The bottoms of the second connecting piece and the third connecting piece are fixedly connected with a bottom piece, and the bottom piece is provided with segmented grooves at equal intervals in an annular manner. The bottom piece is an arc-shaped structure protruding toward the bottom plate.

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