A precise reinforcement-free assembly system for combined patterned concrete-filled steel tube piers

Abstract

The present invention discloses a system for precisely assembling a combined patterned steel tube concrete pier column without reinforcement, which relates to the field of bridge substructure construction. The system comprises, from the outside to the inside, a pier wall, a pier mass, and a pier core. The pier wall and the pier mass form a prefabricated tube shell. Several groups of prefabricated tube shells are butt-jointed and assembled to form a pier column tube shell. A concrete pier core is cast in a hollow chamber of the pier column tube shell to form a complete pier column. The upper side wall of the pier wall is provided with a detachable connecting ring. The upper end surface of the connecting ring is higher than the upper end surface of the pier wall. Several support rods extending upward and bent are evenly arranged around the side wall of the connecting ring. The top of the support rod is connected to a guide rod. The bottom of the guide rod is arranged at an angle with the upper end facing outward. The guide rods are trumpet-shaped with a larger opening at the upper end and a smaller opening at the lower end. Through the cooperation of the temporarily added guide rods and vertical ribs, the system automatically corrects the convex key of the upper prefabricated tube shell into the groove key of the lower prefabricated tube shell, thereby achieving automatic and precise positioning and efficient assembly of the prefabricated tube shells.

Description

Technical field:

[0001] The present invention relates to the field of bridge substructure construction, and in particular to a precise reinforcement-free assembly system for combined patterned steel tube concrete pier columns. Background technology:

[0002] As the scale of my country's infrastructure continues to expand, the industrialized construction technology of bridges has been vigorously developed, and higher requirements have been put forward for the production quality, production efficiency, energy conservation and environmental protection of bridge construction. Among them, the piers of the bridge substructure are indispensable components in bridge construction. The demand is large, but the degree of industrialization is still lacking compared with the superstructure.

[0003] Traditional cast-in-place piers are constructed by erecting formwork, tying steel cages, and pouring concrete on site. While this method offers advantages such as strong seismic resistance at the connection points and good structural integrity, it also has the following disadvantages:

[0004] 1. It is necessary to dismantle the formwork on site, which requires a large amount of formwork, takes a long time to erect and dismantle the formwork, has low turnover efficiency, and a long construction period;

[0005] 2. The poured pier body concrete is ordinary concrete, which has relatively weak tensile strength and durability. It often suffers from cracks, corrosion and other diseases before reaching the design life, resulting in high maintenance costs in the later stage.

[0006] 3. All processes of cast-in-place piers are carried out on-site. The quality of components is restricted by factors such as workers' technical level, weather conditions, and surrounding environment. Standardized production cannot be achieved, production efficiency is low, site pollution is high, and it is not energy-saving and environmentally friendly.

[0007] Traditional fully prefabricated piers are prefabricated in the factory, transported to the construction site for hoisting, and then cast in connection nodes to form the entire bridge structure. This has the advantage of enabling industrialized production and installation, but it also has the following disadvantages:

[0008] 1. The fully prefabricated piers, cap beams, and pedestals are not cast as a whole, but the connection nodes are cast on site. The connection quality is difficult to guarantee, and the structural integrity is relatively poor, making it unsuitable for use in high-intensity earthquake zones.

[0009] 2. The integral pier columns are prefabricated in the factory and transported to the site. The pier columns are heavy, the transportation cost is high, and the on-site positioning and lifting are difficult;

[0010] 3. The size and length of the integral prefabricated piers are fixed, and they often require customized design, resulting in poor assembly flexibility and low versatility.

[0011] With the development of technology, some prefabricated spliced ​​piers have also appeared. The advantage is that the segments are light in weight and easy to transport and lift, but there are the following disadvantages:

[0012] (1) Prestressed beams are used to apply prestressed connections at the pier segment joints. This connection method is not suitable for structures that bear long-term dynamic loads or are located in earthquake zones. There is no ductility protection, and long-term use will cause prestress relaxation and brittle failure, which is very dangerous.

[0013] (2) The pier segment joints are connected by welding or bolting some steel structure components. On-site connection still requires manual climbing operations and the installation of climbing equipment, which is cumbersome and inconvenient.

[0014] (3) Steel cages still need to be tied inside the pier columns to achieve the structure’s bending and tensile bearing functions, which requires a lot of manpower. Summary of the invention:

[0015] In order to solve the problems raised in the above background technology, such as rapid production of bridge piers, template saving, reduced transportation costs and lifting difficulty, reduced manual operation, simplified installation process, and improved production efficiency, while ensuring good integrity, high safety, strong seismic resistance and good durability of the bridge structure, the present invention provides a combined patterned steel tube concrete pier precision unreinforced assembly system.

[0016] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0017] A modular patterned steel tube concrete pier column precision unreinforced assembly system, which is composed of several groups of prefabricated tube shells assembled from top to bottom, characterized in that: the prefabricated tube shells include pier walls and pier materials;

[0018] The pier wall is a pier column shell formed by thin-walled steel plates, which directly contacts and wraps the pier mass inwardly. The pier mass is an annular middle layer of the pier column formed by high-strength fiber concrete through a centrifugal method;

[0019] The upper end of the prefabricated tube shell is provided with groove keys at even intervals on the upper surface of the pier mass, and the groove keys are lower than the top surface of the pier wall. The lower end of the prefabricated tube shell is provided with raised keys at even intervals on the lower surface of the pier mass, and the raised keys protrude from the bottom surface of the pier wall. The groove keys and raised keys have the same shape and plane position;

[0020] The upper end side wall of the pier wall is provided with a detachable connecting ring, the upper end surface of the connecting ring is higher than the upper end surface of the pier wall, and a plurality of support rods are evenly arranged along the side wall of the connecting ring and extended upward by bending, and the top of the support rod is connected to a guide rod, and the bottom of the guide rod is provided on the top surface of the connecting ring. The guide rod is obliquely provided with the upper end facing outward, and the plurality of guide rods are trumpet-shaped with a large opening at the upper end and a small opening at the lower end;

[0021] The prefabricated pipe shells are hoisted and assembled in sequence. After the lower prefabricated pipe shell is fixed, the upper prefabricated pipe shell is hoisted. The lower end of the upper prefabricated pipe shell will fall into the trumpet-shaped upper end opening of several guide rods. The lower end of the upper prefabricated pipe shell moves along the guide rods until the raised key at the lower end of the upper prefabricated pipe shell is stuck into the groove key at the upper end of the lower prefabricated pipe shell. Several groups of prefabricated pipe shells are combined up and down to form an integral pier column pipe shell. The concrete pier core is poured in the integral pier column pipe shell to form a complete pier column.

[0022] Further technology of the present invention:

[0023] Preferably, the upper half of the guide rod is an oblique rod, and the lower half is a vertical rod. The bottom of the vertical rod is connected to the top surface of the connecting ring. The vertical rods form a grid-like cylinder, and the grid-like cylinder is gap-fitted with the pier wall.

[0024] Preferably, the maximum distance between adjacent guide rods is smaller than the width of the raised key or the recessed key.

[0025] Preferably, protruding vertical ribs are evenly provided along the outer surface of the pier wall, the bottom of the vertical ribs is flush with the lower end of the protruding key, and the spacing between adjacent vertical ribs is the same as the spacing between the vertical rods of adjacent guide rods.

[0026] Preferably, the connecting ring is formed by two semicircular rings enclosed by bolts, and the inner wall of the enclosed connecting ring is provided with an annular groove, and a ball is provided in the annular groove. The upper side wall of the pier wall is provided with a limiting ring, and the limiting ring is inserted into the annular groove. The lower end face of the connecting ring is provided with a tooth surface, and a motor is mounted on the upper side wall of the pier wall below the connecting ring. The motor is powered by a ground power supply and is started and stopped by a ground switch. The motor drives the gear to engage with the tooth surface, driving the connecting ring to rotate.

[0027] Preferably, the inner surface of the pier wall is evenly distributed with raised patterns.

[0028] Preferably, the lower end surface of the prefabricated tube shell is coated with a layer of strong structural adhesive, and a layer of plastic sealing film is attached to the surface of the structural adhesive.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention is a modular pier column composed of three media: thin-walled steel pipes, high-strength fiber concrete middle layer and post-cast concrete core. The prefabricated pipe shell composed of thin-walled steel pipes and high-strength fiber concrete middle layer is prefabricated in the factory by a centrifugal method. The prefabricated segments are of standard length and are spliced ​​and assembled on site. They can be used as templates for pouring pier core concrete. There is no need to dismantle the templates on site, so the construction speed is fast, the production efficiency is high, and the template cost is saved.

[0031] It uses an outer steel pipe with high-strength fiber concrete inlaid on the inside, and is made in the factory using a centrifugal method. The outer steel pipe has good natural tensile properties and can replace the steel cage in traditional piers. The overall preparation process is simple and fast; the high-strength fiber concrete material has excellent performance and high strength, which can greatly enhance the durability of the pier, increase its service life, reduce later diseases, and save maintenance costs; and the inner wall of the outer steel pipe is evenly distributed with raised patterns, which strengthens the connection strength between the steel pipe and the middle layer of high-strength fiber concrete, avoiding plasmolysis during bumpy transportation.

[0032] The prefabricated pipe shells are prefabricated segments of standard length, with snap-fit ​​connection keys set on both end faces. The number of prefabricated pipe shells can be flexibly selected for assembly according to the design length of the pier. No custom design is required, the assembly is highly flexible and versatile, and it is convenient for standardized mass production and installation.

[0033] Grooved keys are evenly arranged on the upper end of the prefabricated pipe shell, and raised keys are evenly arranged on the lower end. Through the temporarily added guide rod, automatic correction can be achieved when the prefabricated pipe shell is misaligned during docking. In addition, the guide rod and the protruding vertical ribs on the outer surface of the pier wall cooperate to drive the prefabricated pipe shell to rotate. The raised key at the lower end of the upper prefabricated pipe shell can be just stuck into the groove key at the upper end of the lower prefabricated pipe shell, so that the prefabricated pipe shell can be automatically and accurately positioned and efficiently assembled. During the docking process, there is no need for close operation by staff, which increases safety. The lower end surface is coated with a layer of strong structural adhesive and a layer of plastic sealing film. Before assembly, the film can be torn off to carry out hoisting, alignment, assembly and bonding. The whole process is completed in one go, without the need for manual climbing connection. The operation is simple and fast, and the degree of mechanization is high.

[0034] The pier core concrete is cast-in-place concrete, which can realize the integral casting of the pier body and related connection nodes such as the cap beam and the abutment. The bridge structure has good integrity and strong seismic resistance. It can be used in high-intensity areas and has a wide range of applications.

[0035] The factory-prefabricated part of the combined patterned steel tube concrete unreinforced assembled pier column is light in weight and small in volume, convenient for transportation, saves transportation costs, and is easy to lift. Description of the drawings:

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive efforts.

[0037] Figure 1 This is a diagram showing the butt-jointing deviation between the upper prefabricated tube shell and the lower prefabricated tube shell in Example 2;

[0038] Figure 2This is a three-dimensional schematic diagram of the precise unreinforced assembly system for modular patterned concrete-filled steel tube piers;

[0039] Figure 3 This is the elevation view of the patterned concrete-filled steel tubular pier;

[0040] Figure 4 This is a top view schematic diagram of the patterned concrete-filled steel tube pier;

[0041] Figure 5 It is a three-dimensional schematic diagram of the prefabricated tube shell;

[0042] Figure 6 This is a schematic diagram of the pattern on the inner surface of the pier wall;

[0043] Figure 7 for Figure 1 A in the middle is an enlarged schematic diagram;

[0044] Figure 8 for Figure 1 Middle BB view. Specific implementation method:

[0045] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0046] Example 1:

[0047] See also Figure 2-6 A combined patterned steel tube concrete pier column precision unreinforced assembly system includes, from the outside to the inside, a pier wall 1, a pier mass 2 and a pier core 5. The pier wall 1 is the pier column outer shell surrounded by thin-walled steel plates, which directly contacts and wraps the pier mass 2 inward. The pier mass 2 is an annular middle layer of the pier column formed by high-strength fiber concrete through a centrifugal method, which directly contacts and wraps the pier core 5 inward. The pier core 5 is the pier column core layer formed by post-cast concrete in the hollow surrounded by the pier mass 2.

[0048] The pier wall 1 and the pier mass 2 form a prefabricated shell, which is prefabricated in the factory. The segment length is standardized. Several prefabricated shells are freely assembled according to the designed length of the pier column to form an integral pier column shell. Then, a concrete core 5 is poured in the hollow chamber of the integral pier column shell to form a complete pier column.

[0049] It should be noted that the inner surface of the pier wall 1 is evenly distributed with raised patterns 6 , which serve to connect the pier wall 1 and the pier mass 2 .

[0050] Grooved keys 3 are evenly spaced apart on the upper surface of the pier mass 2 at the upper end of the prefabricated pipe shell, and the grooved keys 3 are lower than the top surface of the pier wall 1. Raised keys 4 are evenly spaced apart on the lower surface of the pier mass 2 at the lower end of the prefabricated pipe shell, and the raised keys 4 protrude from the bottom surface of the pier wall 1. The grooved keys 3 and the raised keys 4 have the same shape and plane position. When the upper and lower prefabricated pipe shells are assembled, the raised key 4 at the lower end of the upper prefabricated pipe shell can be just stuck into the grooved key 3 at the upper end of the lower prefabricated pipe shell, thereby realizing the positioning and assembly of the prefabricated pipe shells.

[0051] The lower surface of the prefabricated tube shell is coated with a layer of strong structural adhesive 7, and a layer of plastic sealing film is attached to the surface of the structural adhesive. Before installation, the plastic sealing film is removed from the lower end of the prefabricated tube shell to expose the structural adhesive. The raised key 4 at the lower end of the prefabricated tube shell to be hoisted is then inserted into the grooved key 3 at the upper end of the prefabricated tube shell to securely bond the prefabricated tube shell.

[0052] This combined patterned steel tube concrete-filled unreinforced assembled pier column uses thin-walled patterned steel plates to prepare a cylindrical pier wall 1 in the factory. The pier wall 1 is then used as the outer shell membrane. High-strength fiber concrete is prepared into an annular pier mass 2 that closely adheres to the pier wall 1 by centrifugal method. The two are combined in the standard stage of prefabricated tube shells and are mass-produced according to needs.

[0053] The batch of prefabricated pipe shells are transported to the construction site, and the prefabricated pipe shells are hoisted in sequence and assembled to form an integral pier column pipe shell. It should be noted that before hoisting, the plastic sealing film at the lower end of the prefabricated pipe shell needs to be torn off to leak out the structural adhesive, and then the raised key 4 at the lower end of the prefabricated pipe shell hoisted later is inserted into the groove key 3 at the upper end of the prefabricated pipe shell in place earlier. The connected multiple sections of prefabricated pipe shell standard segments are firmly bonded by the action of the structural adhesive to form an integral pier column pipe shell that meets the design requirements of height;

[0054] At the construction site, concrete is poured into the continuous cylindrical hollow space formed by the upper opening of the integral pier shell. After curing and consolidation, a complete pier is formed from the outside to the inside by the prefabricated shell composed of several standard segments of patterned steel tube pier wall 1 and high-strength fiber concrete pier mass 2 and the post-cast concrete pier core 5.

[0055] Example 2:

[0056] See also Figure 1 、 7 -8. Based on Example 1, in order to increase safety by eliminating the need for close-range operation by staff during docking, an automatic docking correction device is added. Specifically:

[0057] The upper side wall of the pier wall 1 is provided with a detachable connecting ring 11, the upper end surface of the connecting ring is higher than the upper end surface of the pier wall 1, and a number of bent support rods 12 extending upward are evenly arranged along the side wall of the connecting ring 11. The top of the support rod 12 is connected to a guide rod 13, and the bottom of the guide rod 13 is set on the top surface of the connecting ring 11. The guide rod 13 is set obliquely with the upper end facing outward. Several guide rods 13 are trumpet-shaped with a large opening at the upper end and a small opening at the lower end.

[0058] According to needs, the prefabricated pipe shells are hoisted in sequence and assembled to form an integral pier column pipe shell. After the lower prefabricated pipe shell is fixed, the upper prefabricated pipe shell is hoisted. If the deviation occurs within a certain range during the hoisting process, the lower end of the upper prefabricated pipe shell will fall into the trumpet-shaped upper end opening of the guide rods 13. In this way, if it continues to descend, the lower end of the upper prefabricated pipe shell will move along the guide rods, and the lower end of the upper prefabricated pipe shell will be continuously corrected, and the docking accuracy is improved.

[0059] In the case of the above-mentioned improvement in docking accuracy, the lower end of the upper prefabricated tube shell is constantly corrected, but it must eventually be aligned with the lower prefabricated tube shell. In this regard:

[0060] The upper half of the guide rod 13 is an oblique rod 131, and the lower half is a vertical rod 132. The bottom of the vertical rod 132 is connected to the top surface of the connecting ring 11. The vertical rods 132 form a grid-like cylinder 133, and the grid-like cylinder 133 is gap-fitted with the pier wall 1.

[0061] The lower end of the upper prefabricated tube shell will fall on the trumpet-shaped upper end openings of the guide rods 13, and continue to descend and correct along the oblique rods until it falls into the grid-shaped cylinder 133 formed by the vertical rods. At this time, the upper and lower docking is completed and it continues to descend.

[0062] It should be noted that, in order to ensure the stability of the guide rods, all the guide rods are connected by the same reinforcement ring 18 .

[0063] Next, the raised key 4 on the lower end of the upper prefabricated tube shell needs to be brought into contact with the groove key 3 on the upper end of the lower prefabricated tube shell in the following manner:

[0064] The maximum spacing between adjacent guide rods 13 is less than the width of the raised key 4 or the groove key 3. This ensures that the lower end raised key 4 of the upper prefabricated tube shell will not be stuck between adjacent guide rods 13 and guide rods 13, and can slide down smoothly.

[0065] The connecting ring 11 is formed by two semicircular rings enclosed by bolts, and the inner wall 11 of the enclosed connecting ring is provided with an annular groove 19, and a ball 20 is provided in the annular groove 19. The upper end side wall of the pier wall 1 is provided with a limiting ring 21, and the limiting ring 21 is inserted into the annular groove 19. The lower end face of the connecting ring 11 is provided with a tooth surface 15, and the upper end side wall of the pier wall 1 below the connecting ring 11 is provided with a motor 16. The motor 16 is powered by a ground power supply and is started and stopped by a ground switch. The motor 16 drives the gear 17 to engage with the tooth surface 15, driving the connecting ring 11 to rotate.

[0066] Since the motor, power supply and switch are commonly connected in series to realize this function, the motor referred to in this embodiment includes a motor body and a matching reducer, which can be realized by those skilled in the art and will not be described in detail.

[0067] The motor starts, the driving gear engages with the tooth surface, and drives the connecting ring 11 to rotate. The connecting ring rotates around the limit ring 21 through the ball 20 provided in the annular groove 19, driving the guide rod to rotate. It should be noted here that the height of the vertical rod must be greater than the vertical length of the lower end protruding key 4 of the upper prefabricated tube shell to ensure that when the lower end of the upper prefabricated tube shell falls into the grid-shaped cylinder 133 formed by the vertical rod, the lower end protruding key 4 of the upper prefabricated tube shell and the upper end groove key 3 of the lower prefabricated tube shell do not temporarily contact.

[0068] Protruding vertical ribs 14 are evenly provided along the outer surface of the pier wall 1 , the bottom of the vertical ribs 14 is flush with the lower end of the protruding key 4 , and the spacing between adjacent vertical ribs 14 is the same as the spacing between the vertical rods 132 of adjacent guide rods.

[0069] As mentioned above, the lower end of the upper prefabricated tube shell falls into the grid-shaped cylinder 133 formed by the vertical rods, and vertical ribs 14 are added. The vertical ribs are stuck in the grid of the grid-shaped cylinder 133, that is, they fall between the vertical rods. This ensures that the upper prefabricated tube shell is driven to rotate during the subsequent rotation process, and the docking adjustment of the protruding key 4 and the groove key 3 is performed.

[0070] It should be noted that before the lower end of the upper prefabricated tube shell falls into the grid-shaped cylinder 133 formed by the vertical rods, if the vertical ribs fail to be vertically stuck in the grid of the grid-shaped cylinder 133, start the motor, rotate the connecting ring 11, and vertically align the vertical ribs with the grid of the grid-shaped cylinder 133. Then, continue to lower the upper prefabricated tube shell so that the vertical ribs can be stuck in the grid of the grid-shaped cylinder 133, that is, fall between the vertical rods.

[0071] This embodiment solves the problem of not requiring close operation by staff during the docking process, thereby increasing safety. Before docking, the connecting ring, motor and other structures are installed. After the docking is completed, the connecting ring, motor and other equipment are removed and continue to be installed on the prefabricated pipe shell of the upper layer, and the docking is continued. After all are completed, they can be removed.

[0072] It should be noted that, in this document, terms such as "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0073] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular patterned concrete-filled steel tube pier column precision unreinforced assembly system, consisting of several sets of prefabricated tube shells assembled from top to bottom, characterized by: The prefabricated shell includes a pier wall (1), a pier material (2); The pier wall (1) is a pier column shell formed by thin-walled steel plates, which directly contacts and wraps the pier mass (2) inwardly. The pier mass (2) is an annular middle layer of the pier column formed by high-strength fiber concrete through a centrifugal method. The upper end of the prefabricated tube shell is provided with groove keys (3) at even intervals on the upper surface of the pier (2), and the groove keys (3) are lower than the top surface of the pier wall (1); the lower end of the prefabricated tube shell is provided with raised keys (4) at even intervals on the lower surface of the pier (2), and the raised keys (4) protrude from the bottom surface of the pier wall (1); the groove keys (3) and the raised keys (4) are identical in shape and plane position; The upper side wall of the pier wall (1) is provided with a detachable connecting ring (11), the upper end surface of the connecting ring (11) is higher than the upper end surface of the pier wall (1), and a plurality of support rods (12) are evenly provided along the side wall of the connecting ring (11) and are bent and extended upward. The top of the support rod (12) is connected to a guide rod (13), and the bottom of the guide rod (13) is provided on the top surface of the connecting ring (11). The guide rod (13) is obliquely provided with the upper end facing outward, and the plurality of guide rods (13) are trumpet-shaped with a large opening at the upper end and a small opening at the lower end; The prefabricated tube shells are hoisted and assembled in sequence. After the lower prefabricated tube shell is fixed, the upper prefabricated tube shell is hoisted. The lower end of the upper prefabricated tube shell falls into the trumpet-shaped upper end opening of the plurality of guide rods (13). The lower end of the upper prefabricated tube shell moves along the guide rods (13) until the raised key (4) at the lower end of the upper prefabricated tube shell is inserted into the groove key (3) at the upper end of the lower prefabricated tube shell. The plurality of groups of prefabricated tube shells are assembled from top to bottom to form an integral pier column tube shell. A concrete pier core (5) is poured into the integral pier column tube shell to form a complete pier column. The upper half of the guide rod (13) is an oblique rod (131), and the lower half is a vertical rod (132). The bottom of the vertical rod (132) is connected to the top surface of the connecting ring (11). The vertical rod (132) forms a grid-shaped cylinder (133), and the grid-shaped cylinder (133) is gap-fitted with the pier wall (1). The maximum spacing between adjacent guide rods (13) is smaller than the width of the raised key (4) or the groove key (3); Protruding vertical ribs (14) are evenly arranged along the outer surface of the pier wall (1), the bottom of the vertical ribs (14) is flush with the lower end of the raised key (4), and the spacing between adjacent vertical ribs (14) is the same as the spacing between the vertical rods (132) of adjacent guide rods; The connecting ring (11) is formed by two semicircular rings being closed together by bolts. The inner wall of the closed connecting ring (11) is provided with an annular groove (19), and a ball (20) is provided in the annular groove (19). The upper side wall of the pier wall (1) is provided with a limiting ring (21), and the limiting ring (21) is inserted into the annular groove (19). The lower end surface of the connecting ring (11) is provided with a tooth surface (15). The upper side wall of the pier wall (1) below the connecting ring (11) is provided with a motor (16). The motor (16) is powered by a ground power supply and is started and stopped by a ground switch. The motor (16) drives a gear (17) to engage with the tooth surface (15), thereby driving the connecting ring (11) to rotate.

2. The precise unreinforced assembly system for patterned concrete-filled steel tube piers according to claim 1, characterized in that: The inner surface of the pier wall (1) is evenly distributed with raised patterns (6).

3. The precise unreinforced assembly system for patterned concrete-filled steel tube piers according to claim 1, characterized in that: The lower end surface of the prefabricated tube shell is coated with a layer of strong structural adhesive (7), and a layer of plastic sealing film is attached to the surface of the strong structural adhesive.

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