Large-diameter deep hole rock-socketed pile

Abstract

The present application relates to the technical fields of pile foundation structure, and specifically discloses a large-diameter deep-hole rock-socketed pile; the rock-socketed pile comprises a multi-section variable-diameter reinforcement cage poured in concrete, and the multi-section variable-diameter reinforcement cage can be butt-jointed at the head and tail; the variable-diameter reinforcement cage comprises a variable-diameter framework, a variable-diameter cage and a plurality of self-locking pieces; the variable-diameter cage comprises a plurality of main reinforcements distributed in a circumferential direction around the variable-diameter framework, at least two connecting rods are hinged between each main reinforcement and the variable-diameter framework, and a plurality of spiral stirrups are installed on the periphery of the plurality of main reinforcements; when a force is applied to the variable-diameter framework by pressing it downward, the variable-diameter framework is expanded by the connecting rods, the radius of the spiral stirrups is increased, and the self-locking pieces and the connecting rods are self-locked. The rock-socketed pile provided by the present application avoids the need to pre-produce a variable-diameter reinforcement cage of a corresponding depth each time, improves the flexibility of construction, and greatly shortens the period of material preparation in the early stage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pile foundation structure, and particularly discloses a large-diameter deep-hole rock-socketed pile. BACKGROUND

[0002] The rock-socketed pile is an important type of pile in pile foundation engineering and belongs to a type of cast-in-place pile, and a core feature thereof is that a lower part of the pile body is embedded into a base rock by a certain depth, and the upper structure load is borne by the embedding action of the pile body and the base rock, the side friction of the pile and the end resistance of the pile, and the rock-socketed pile is widely applied to scenarios such as high-rise buildings, bridges, ports and wharfs, and water conservancy projects, which have high requirements for foundation bearing capacity and complex geological conditions (for example, thin overburden and hard base rock under soft soil foundation).

[0003] The rock-socketed pile is composed of an upper soil-penetrating section and a lower rock-socketed section, a hole is continuously drilled from the soil layer to the rock layer in the foundation by a drilling device, a reinforcement cage is placed in the pile hole, and the rock-socketed pile is integrally formed by pouring concrete, so as to be embedded into the rock layer to jointly form a pile foundation base; during design and construction, the structure design needs to be strictly combined with the geological exploration structure, and multiple factors such as the engineering geological conditions, the pile type function, the load requirement and the design specification are considered to determine the overall depth of the lower rock-socketed section, so that the depth of the rock-socketed pile embedded into the rock layer is different under different conditions; under general conditions, the rock-socketed pile mainly plays a core function of providing stable bearing capacity, but in combination with actual engineering application scenarios, for example, the rock-socketed pile is used as a high-rise building foundation, the rock-socketed pile bears the water buoyancy of underground structures, the rock-socketed pile is used as a foundation of marine and water transportation engineering facilities, and the rock-socketed pile is in a multiple-vibration and easy-settlement environment, the rock-socketed pile also needs to provide effective uplift resistance to ensure the stability and safety of the pile foundation base; under the prior art, the uplift resistance can be increased by increasing the depth of the rock-socketed section, strengthening the reinforcement of the reinforcement cage and using the expanded-base rock-socketed pile, and the expanded-base rock-socketed pile refers to the method of continuing to expand the hole diameter to increase the hole diameter of the rock-socketed section on the basis of the original hole diameter during drilling, and cooperating with the variable-diameter reinforcement cage to perform expanded-base pouring and filling; the variable-diameter reinforcement cage is connected to the bottom end of the original fixed structure reinforcement cage, and the variable-diameter reinforcement cage is located in the rock-socketed section, and as known from the foregoing, the depth of the rock-socketed section embedded into the rock layer is not fixed, so at present, the variable-diameter reinforcement cage of a certain length can only be prefabricated according to the designed depth of the rock-socketed section, and the variable-diameter reinforcement cage is not universal when used in different depths, and can only be re-prefabricated, so the flexibility is low, and the material preparation period before construction is greatly increased. SUMMARY

[0004] In order to solve the above problems, the present application provides a large-diameter deep-hole rock-socketed pile, which is used to solve the problems mentioned in the background art.

[0005] In order to achieve the above object, the present application adopts the following technical scheme to realize it: A large-diameter deep-hole rock-socketed pile comprises a plurality of multi-diameter steel cages poured in concrete, and the multi-diameter steel cages can be butt-jointed at the head and tail; the multi-diameter steel cage comprises a multi-diameter framework, a multi-diameter cage and a plurality of self-locking members; the two ends of the multi-diameter framework are fixed with butt-joint assemblies capable of being assembled and butt-jointed with each other; the multi-diameter cage comprises a plurality of main reinforcements distributed circumferentially around the multi-diameter framework, and at least two connecting rods are hinged between each main reinforcement and the multi-diameter framework, and a limiting position is arranged on the multi-diameter framework to limit the position of the connecting rod; the two ends of each main reinforcement are fixed with plug-in assemblies capable of being plugged in and matched with each other; a plurality of spiral stirrups are collectively installed on the periphery of the plurality of main reinforcements; a plurality of self-locking members are assembled on the multi-diameter framework and correspondingly distributed with the plurality of connecting rods hinged on the same main reinforcement; the number of self-locking members in each group is the same as the number of main reinforcements, and the plurality of self-locking members in each group are one-to-one self-locking matched with the plurality of correspondingly distributed connecting rods.

[0006] When the plurality of multi-diameter steel cages are butt-jointed at the head and tail, the plurality of multi-diameter frameworks are sequentially fixed and connected in series through the butt-joint assemblies, and the main reinforcements in the relative positions are sequentially plugged in and connected in series through the plug-in assemblies.

[0007] When the sequentially connected multi-diameter frameworks are pressed downward, the multi-diameter frameworks expand the plurality of main reinforcements through the connecting rods, and the radius of the spiral stirrups increases accordingly, and when the connecting rods reach the limiting position, the self-locking members and the connecting rods are self-locked.

[0008] Preferably, the multi-diameter framework comprises two end members distributed above and below and a connecting column fixed between the two end members; the two ends of the main reinforcement are sleeved and fixed with a hinged sleeve, and the two hinged sleeves are correspondingly hinged with a connecting rod between the two end members; one group of self-locking members is assembled in each of the two end members.

[0009] Preferably, the end member comprises a cylindrical bin and an end disc fixed at the top end of the cylindrical bin; the connecting column is fixed at the bottom end of the cylindrical bin of the upper end member and the top end of the end disc of the lower end member at the upper and lower ends respectively; one end of the connecting rod is hinged to the outer wall of the cylindrical bin; and one group of self-locking members is assembled in the cylindrical bin.

[0010] Preferably, the plurality of self-locking members in one group are circumferentially distributed around the center of the cylindrical bin; the self-locking member comprises a sliding seat slidably installed in the cylindrical bin along the radial direction of the cylindrical bin, a locking pin fixed on the sliding seat, the locking pin slidably penetratingly installed on the side wall of the cylindrical bin, a spring sleeved on the locking pin, and the two ends of the spring fixed on the sliding seat and the inner wall of the cylindrical bin; the end of the connecting rod away from the hinged sleeve is provided with a locking insertion hole plugged in and matched with the locking pin; and when not self-locked, the end of the connecting rod and the locking pin keep in contact.

[0011] Preferably, the plug-in assembly comprises a plug-in cylinder fixed at the top end of the upper hinged sleeve and a plug-in rod fixed at the bottom end of the lower hinged sleeve, and the plug-in rod can be plugged in and matched with the plug-in cylinder.

[0012] Preferably, the docking assembly comprises a docking cylinder fixed at the top end of the upper end disc and a rotating seat fixed at the bottom end of the lower cylinder, and a rotating sleeve capable of threadedly cooperating with the docking cylinder is rotatably installed on the rotating seat.

[0013] Preferably, the main bars are even in number, the two ends of each of the main bars in turn slidingly cooperating with a spiral hoop, and the middle part of the spiral hoop is fixed on another main bar, and the main bars slidingly cooperating with the spiral hoop and the main bar fixed with the spiral hoop are located at opposite positions in the diameter direction of the main bar distribution circle.

[0014] Preferably, the bottom end of the insertion rod movably inlaid with a ball.

[0015] Preferably, the two ends of the spiral hoop are provided with sliding buckles slidingly cooperating with the main bars.

[0016] The above technical solution has the following advantages or beneficial effects: the present application provides a large-diameter deep-hole rock-socketed pile, for rock-socketed piles that need to provide additional uplift resistance, a variable-diameter reinforcement cage that is standardized and can be assembled in multiple sections is arranged in the reinforcement cage structure of the rock-socketed pile, when dealing with rock-socketed sections of different depths, the variable-diameter reinforcement cage can be quickly assembled through docking, avoiding the need to pre-produce a variable-diameter reinforcement cage of the corresponding depth each time, improving the flexibility of construction and greatly shortening the cycle of preliminary material preparation; in addition, in the variable-diameter reinforcement cage, on the one hand, the quick docking between the variable-diameter skeletons can be completed through the docking assembly, and on the other hand, the series connection docking between the main bars can be completed through the insertion assembly, the connection strength and integrity of the docking between the multiple variable-diameter reinforcement cages are synchronously ensured from the inside to the outside, a direct downward variable-diameter design is adopted, and synchronous self-locking can be performed during variable-diameter adjustment, the operation is simple and convenient, and the series connection docking between the variable-diameter cages ensures the synchronicity of the variable-diameter adjustment action and the consistency of the adjustment state. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application and its features, shapes and advantages will become more apparent from the following detailed description of non-limiting embodiments, with reference to the accompanying drawings. The same reference numbers in all the drawings indicate the same parts and the drawings are not necessarily drawn to scale, the emphasis being on illustrating the principle of the present application.

[0018] Figure 1 is a perspective view of a variable-diameter reinforcement cage.

[0019] Figure 2 is a front view of two variable-diameter reinforcement cages in a docked state.

[0020] Figure 3 is Figure 2 is a sectional view of A-A in

[0021] Figure 4 is a perspective sectional view of a set of self-locking pieces assembled in an end piece.

[0022] Figure 5 is a perspective view of a single self-locking piece assembled with a cylindrical silo.

[0023] Figure 6 is a perspective view of a variable-diameter cage.

[0024] Figure 7 is a plan view of a plurality of spiral stirrups and a plurality of main reinforcement bars being wound and assembled.

[0025] Figure 8 is a perspective view of a spiral stirrup.

[0026] Figure: 1, variable-diameter framework; 11, end piece; 12, cylindrical silo; 121, guide bar; 13, end disc; 131, limiting ring; 14, connecting column; 15, butt joint assembly; 151, butt joint cylinder; 152, rotating seat; 153, rotating sleeve; 2, variable-diameter cage; 21, main reinforcement bar; 211, hinged sleeve; 22, connecting rod; 221, locking hole; 23, spiral stirrup; 231, sliding buckle; 24, plug-in assembly; 241, plug-in cylinder; 242, plug-in rod; 243, ball; 3, self-locking piece; 31, sliding seat; 32, locking pin; 33, spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0028] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] As shown in Figure 1 and Figure 2 , a large-diameter deep-hole rock-socketed pile includes a plurality of variable-diameter reinforcement cages poured in concrete, which can be butt-jointed; it should be noted that the variable-diameter reinforcement cage is a prefabricated piece of standard length, and according to the depth of the rock-socketed section of the rock-socketed pile designed for construction, several variable-diameter reinforcement cages are selected for butt-joint assembly, in addition, the rock-socketed pile also includes a fixed-structure reinforcement cage poured in concrete, which is butt-jointed at the top end of the plurality of variable-diameter reinforcement cages.

[0030] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the variable-diameter reinforcement cage comprises a variable-diameter framework 1; the variable-diameter framework 1 comprises two upper and lower end pieces 11 and a connecting column 14 fixed between the centers of the two end pieces 11; it should be noted that here, the upper and lower positions are based on the attitude state of the variable-diameter reinforcement cage when it is placed vertically into the rock-socketed pile hole; the end piece 11 comprises a cylindrical bin 12 and an end disc 13 welded at the top end of the cylindrical bin 12; the connecting column 14 is welded at the bottom end of the cylindrical bin 12 of the upper end piece 11 and the top end of the end disc 13 of the lower end piece 11, respectively; in order to flow and fill the concrete in the structure during pouring, the centers of the cylindrical bin 12 and the end disc 13 are both holed, the connecting column 14 is a circular tube structure, and the sidewall of the connecting column 14 is holed through. The two end pieces 11 are fixed with butt joint assemblies 15 that can be mutually matched and assembled in butt joint; the butt joint assembly 15 comprises a butt joint cylinder 151 centrally welded at the top end of the upper end disc 13 and a rotating seat 152 welded at the bottom end of the lower cylindrical bin 12, and the rotating seat 152 is rotatably installed with a rotating sleeve 153 that can be threadedly matched with the butt joint cylinder 151.

[0031] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 6 , the variable-diameter framework 1 is peripherally assembled with a variable-diameter cage 2; the variable-diameter cage 2 comprises six main reinforcements 21 uniformly distributed in the circumferential direction around the variable-diameter framework 1; the two ends of the main reinforcement 21 are sleeved and welded with hinged sleeves 211, both of the two hinged sleeves 211 are hinged with connecting rods 22, and the other ends of the two connecting rods 22 are correspondingly hinged on the outer walls of the two cylindrical bins 12; each main reinforcement 21 is hinged between the variable-diameter framework 1 through the two connecting rods 22, which is equivalent to a deformable parallelogram structure, and the main reinforcement 21 always maintains a parallel state with the connecting column 14. The hinged sleeves 211 located at the two ends of the main reinforcement 21 are fixed with plug-in assemblies 24 that can be mutually plug-in matched; the plug-in assembly 24 comprises a plug-in cylinder 241 sleeved and welded at the top end of the upper hinged sleeve 211 and a plug-in rod 242 sleeved and welded at the bottom end of the lower hinged sleeve 211, and the plug-in rod 242 can be plug-in matched with the plug-in cylinder 241; the bottom end of the plug-in rod 242 movably inlaid has a ball 243.

[0032] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 and Figure 8As shown, the periphery of the six main bars 21 is collectively wrapped with three spiral hoops 23; the spiral hoops 23 are made of alloy steel wire material, have large elastic force and can adapt to elastic deformation. The two ends of the spiral reinforcement are bent and processed into sliding buckles 231; the main bars 21 distributed at intervals are all in sliding cooperation with the sliding buckles 231 at the two ends of one spiral hoop 23, and the middle part of the spiral hoop 23 is welded on another main bar 21. The main bars 21 in sliding cooperation with the spiral hoop 23 and the main bars 21 fixed with the spiral hoop 23 are in opposite positions in the diameter direction of the distribution circle of the six main bars 21. It should be noted that in the embodiment, the spiral hoops 23 are basically arranged in the middle relative to the two ends of the main bars 21, so the welding points of the spiral hoops 23 are approximately at the middle point position; under the wrapping constraint of the three spiral hoops 23, the six main bars 21 are uniformly scattered around the variable-diameter framework 1.

[0033] As shown in Figure 3 , Figure 4 and Figure 5 , each group of self-locking pieces 3 is six in number; the inner end face of the cylindrical silo 12 is welded with six guide bars 121, which are uniformly distributed around the center of the cylindrical silo 12, and the guide direction of the guide bar 121 is arranged in a radial manner along the cylindrical silo 12. The six connecting rods 22 hinged on the same cylindrical silo 12 form a group, and the two groups of connecting rods 22 are arranged correspondingly with the two groups of self-locking pieces 3, and the six self-locking pieces 3 in one group are correspondingly matched with the six connecting rods 22 in one group; the six self-locking pieces 3 are correspondingly installed on the six guide bars 121, and the self-locking piece 3 includes a sliding seat 31 slidably installed on the guide bar 121, a lock pin 32 welded on the sliding seat 31, the lock pin 32 slidably penetrates and is installed on the side wall of the cylindrical silo 12, and the end of the lock pin 32 is in a hemispherical head structure; a spring 33 is sleeved on the lock pin 32, and the two ends of the spring 33 are welded on the sliding seat 31 and the inner wall of the cylindrical silo 12; the end of the connecting rod 22 away from the hinged sleeve 211 is provided with a locking hole 221 matched with the lock pin 32, and the bottom end of the end disc 13 is provided with a limiting ring 131 aligned with the edge, which serves as a limiting position for the six connecting rods 22; when not self-locking, the connecting rod 22 is in contact with the lock pin 32, and the spring 33 is in a stretched state.

[0034] When the rock-socketed pile construction is carried out, the ground is first drilled by a drilling equipment. When drilling, the soil layer is first drilled into the rock layer, and the soil layer hole can be supported and reinforced by the sleeve synchronously with the drilling. Then, the drilling in the rock layer continues to the corresponding design depth. Next, further enlarged drilling is carried out in the rock layer hole until the rock layer hole section reaches the design depth.

[0035] After the pile foundation hole drilling is completed, the steel reinforcement structure of the rock-socketed pile can be placed into the hole. The steel reinforcement structure needs to be vertically lifted and placed into the hole by the existing crane. Since the construction of the deep hole rock-socketed pile is being carried out, the corresponding hole is very deep, and the rock-socketed section of the rock-socketed pile as a whole will not be very short. A plurality of sections of the variable-diameter reinforcement cage need to be connected and assembled. In order to facilitate lifting and operation, the plurality of sections of the variable-diameter reinforcement cage can be divided into a plurality of groups in advance, and the plurality of sections of the variable-diameter reinforcement cage in each group can be pre-connected and assembled. When lifting and placing, one group of connected variable-diameter reinforcement cages is lifted and placed into the hole first, and then the next group of connected variable-diameter reinforcement cages is connected and assembled, and then the next group of connected variable-diameter reinforcement cages is placed down. When all the plurality of sections of the variable-diameter reinforcement cage are placed into the hole, the top end of the variable-diameter reinforcement cage at the top end can be connected and fixed with a structure reinforcement cage. The structure reinforcement cage can be fixed on the end disc 13 at the top end by welding or flange connection. It should be noted that the structure reinforcement cage also needs to be placed into the hole section by section, and the plurality of sections of the structure reinforcement cage can be connected by iron wire.

[0036] The connection and assembly between the variable-diameter reinforcement cages will be described in detail below. The connection and assembly between the two sections of the variable-diameter reinforcement cage are the same. The connection and assembly between the two sections of the variable-diameter reinforcement cage will be described as an example. In order to facilitate description, the two sections of the variable-diameter reinforcement cage are named as a first section of the variable-diameter reinforcement cage and a second section of the variable-diameter reinforcement cage. The state of the connection and assembly between the two sections of the variable-diameter reinforcement cage can be seen from Figure 2 and Figure 3 Specifically, the six insertion rods 242 in the second section of the variable-diameter reinforcement cage are inserted into the six insertion barrels 241 of the first section of the variable-diameter reinforcement cage one by one. Then the rotating sleeve 153 of the second section of the variable-diameter reinforcement cage is rotated and screwed into the connection barrel 151 of the first section of the variable-diameter reinforcement cage, so that the rotating sleeve 153 and the connection barrel 151 are connected by thread. When the rotating sleeve 153 is completely screwed into the connection barrel 151, the insertion rod 242 is inserted to the deepest part of the insertion barrel 241. The thread connection between the rotating sleeve 153 and the connection barrel 151 realizes the connection between the two sections of the variable-diameter reinforcement cage. The corresponding insertion of the main reinforcement 21 between the insertion rod 242 and the insertion sleeve realizes the corresponding connection between the main reinforcements 21 of the plurality of sections of the variable-diameter reinforcement cage. The connection between the plurality of sections of the variable-diameter reinforcement cage enhances the integrity of the plurality of sections of the variable-diameter reinforcement cage, and ensures that the variable-diameter cages 2 of the plurality of sections of the variable-diameter reinforcement cage remain synchronized during the variable-diameter adjustment and consistent after the adjustment.

[0037] When the overall placement of the reinforcement cage is completed, the six insertion rods 242 in the variable-diameter reinforcement cage at the bottom end are in rolling contact with the ground of the rock stratum hole through the balls 243, and then variable-diameter adjustment is performed. In the hoisting state, the multi-section series of fixed-structure reinforcement cages above are pressed downward, and in the process of pressing downward, the crane end is pre-synchronized downward, and the fixed-structure reinforcement cage is indirectly pressed on the multi-section series of variable-diameter skeletons 1. The variable-diameter skeletons 1 are synchronized with the fixed-structure reinforcement cage to descend, and in the process of descending, the end piece 11 drives the main reinforcement 21 to move away from the center of the variable-diameter skeleton 1 through the connecting rod 22. At this time, the main reinforcement 21 between the sections is kept synchronized, and then the main reinforcement 21 spreads the spiral stirrup 23. On the basis of being fixed in the middle, the two sliding buckles 231 of the spiral stirrup 23 slide on the main reinforcement 21 and approach each other, and the radius gradually increases, so that the variable-diameter cage 2 achieves the effect of expanding the diameter. With gradual pressing downward, when the connecting rod 22 rotates around the hinge of the end piece 11 to the horizontal state, the connecting rod 22 is in contact with the limiting ring 131, and the connecting rod 22 and the end piece 11 are mutually restrained. The variable-diameter skeleton 1 descends to the lowest position, and at this time, the locking hole 221 is just aligned with the locking pin 32. Under the action of the spring 33, the locking pin 32 automatically pops into the locking hole 221, and the self-locking piece 3 completes the self-locking of the connecting rod 22. The radius of the variable-diameter cage 2 reaches the maximum, and in the locked state, the variable-diameter cage 2 maintains the maximum radius state. It should be noted that when the locking state is reached, the rotating sleeve 153 of the variable-diameter reinforcement cage at the bottom end is still higher than the position of the ball 243 and does not contact the ground, that is, the ground of the rock stratum hole does not interfere with the variable-diameter process.

[0038] After the variable-diameter reinforcement cage is completed, the variable-diameter adjustment can be performed in the hole, and after the concrete is solidified and formed, the rock-embedded pile embedded in the rock stratum is formed.

[0039] The present application provides a large-diameter deep-hole rock-embedded pile. For rock-embedded piles that need to provide additional uplift resistance, a standardized and multi-section butt joint assembly variable-diameter reinforcement cage is arranged in the reinforcement cage structure of the rock-embedded pile. When dealing with different depths of rock-embedded sections, the variable-diameter reinforcement cage can be quickly butt jointed and assembled, avoiding the need to pre-produce variable-diameter reinforcement cages of corresponding depths each time, improving the flexibility of construction, and greatly shortening the cycle of pre-material preparation. In addition, in the variable-diameter reinforcement cage, on the one hand, the quick butt joint between the variable-diameter skeletons 1 can be completed through the butt joint assembly 15, and on the other hand, the series butt joint between the main reinforcements 21 can be completed through the insertion assembly 24. The connection strength and integrity of the butt joint between the multi-section variable-diameter reinforcement cages are synchronously ensured from the inside to the outside. The direct pressing variable-diameter design is adopted, and synchronous self-locking can be performed during variable-diameter adjustment. The operation is simple and convenient, and the series butt joint between the variable-diameter cages 2 ensures the synchronicity of the variable-diameter adjustment action and the consistency of the adjustment state.

[0040] In the description of the application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0041] In the description of the application, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "connection", "installation", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood through specific circumstances.

[0042] The preferred embodiments of the application are described above. It needs to be understood that the application is not limited to the above specific embodiments, and the devices and structures not described in detail should be understood as being implemented in the ordinary way in the art; any person skilled in the art can make many possible changes and modifications, or modify equivalent embodiments without departing from the technical solution of the application, which does not affect the essential content of the application. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the application, without departing from the technical solution of the application, still belongs to the protection scope of the technical solution of the application.

Claims

1. A large-diameter deep-hole rock-embedded pile, characterized in that: This includes multiple sections of variable-diameter reinforcing cages cast in concrete, which can be connected end-to-end; the variable-diameter reinforcing cages include: The variable diameter frame has docking components fixed at both ends that can be assembled and connected with each other; The variable diameter cage includes multiple main ribs distributed circumferentially around the variable diameter skeleton. Each main rib is hinged to the variable diameter skeleton with at least two connecting rods. The variable diameter skeleton is provided with limiting positions that restrict the position of the connecting rods. Each main rib has plug-in components that can be plugged into each other at both ends. Multiple spiral stirrups are wound around the periphery of the multiple main ribs. And multiple sets of self-locking components are assembled on the variable diameter skeleton and are distributed correspondingly to multiple connecting rods hinged on the same main rib; the number of self-locking components in each set is the same as the number of main ribs, and multiple self-locking components in each set are self-lockingly engaged with multiple connecting rods distributed accordingly. When multiple variable diameter steel bars are joined end to end, the multiple variable diameter skeletons are fixed and connected in series through the joining components, and the main bars at relatively opposite positions are connected in series through the plug-in components. When the variable diameter skeleton is pressed down in sequence, the variable diameter skeleton opens up multiple sets of main bars through the connecting rod, and the radius of the spiral stirrup increases accordingly. When the connecting rod reaches the limit position, the self-locking part and the connecting rod complete self-locking. Multiple self-locking components are distributed circumferentially around the center of the silo in a set; the self-locking component includes a sliding seat that is slidably installed in the silo along the radial direction of the silo, a locking pin that is fixed on the sliding seat, the locking pin that is slidably installed through the side wall of the silo, a spring that is sleeved on the locking pin, and the two ends of the spring are fixed to the sliding seat and the inner wall of the silo; a locking hole that engages with the locking pin is provided at the end of the connecting rod away from the hinge sleeve; when not self-locking, the end of the connecting rod is in contact with the locking pin.

2. The large-diameter deep-hole rock-embedded pile according to claim 1, characterized in that: The variable diameter frame includes two end pieces distributed vertically and a connecting column fixed between the two end pieces; hinge sleeves are fitted and fixed at both ends of the main rib, and connecting rods are correspondingly hinged between the two hinge sleeves and the two end pieces; a set of self-locking components is assembled in each of the two end pieces.

3. A large-diameter deep-hole rock-embedded pile according to claim 2, characterized in that: The end piece includes a cylindrical silo and an end plate fixed to the top of the cylindrical silo; the upper and lower ends of the connecting column are respectively fixed to the bottom end of the cylindrical silo of the upper end piece and the top end of the end plate of the lower end piece. One end of the connecting rod is hinged to the outer wall of the silo; a set of self-locking components is assembled inside the silo.

4. A large-diameter deep-hole rock-embedded pile according to claim 2, characterized in that: The plug-in assembly includes a plug-in cylinder fixed to the top of the upper hinge sleeve and a plug-in rod fixed to the bottom of the lower hinge sleeve. The plug-in rod can be plugged into the plug-in cylinder.

5. A large-diameter deep-hole rock-embedded pile according to claim 3, characterized in that: The docking assembly includes a docking cylinder fixed to the top of the upper end plate and a rotating seat fixed to the bottom of the lower cylindrical silo. A rotating sleeve capable of threadedly engaging with the docking cylinder is rotatably mounted on the rotating seat.

6. A large-diameter deep-hole rock-embedded pile according to claim 1, characterized in that: The number of main reinforcement bars is even, and each of the alternating main reinforcement bars has a sliding fit with both ends of a spiral stirrup. The middle of the spiral stirrup is fixed to another main reinforcement bar. The main reinforcement bars that slide with the spiral stirrup and the main reinforcement bars that are fixed to the spiral stirrup are in relative positions along the diameter of the distribution circle of the multiple main reinforcement bars.

7. A large-diameter deep-hole rock-embedded pile according to claim 4, characterized in that: The bottom end of the connector is movably embedded with ball bearings.

8. A large-diameter deep-hole rock-embedded pile according to claim 6, characterized in that: Both ends of the spiral stirrup are provided with sliding buckles that slide with the main reinforcement.

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