Construction method of steel pipe concrete composite inclined pile in large tidal range river environment

Abstract

The application provides a construction method of a steel pipe concrete composite inclined pile in a large-tidal-range river environment, and belongs to the technical field of bridge construction. The method comprises a support frame, an adjusting mechanism and an inner support mechanism. The support frame is in the form of an equilateral triangular frame. The inner support mechanism is arranged on the end face of each corner of the support frame and is used for supporting a reinforcing ring of a reinforcement cage to prevent the reinforcement cage from being deformed under pressure. The support frame in the form of an equilateral triangular frame can evenly distribute the pressure received by the inner support mechanism, thereby improving the supporting strength of the inner support mechanism and avoiding the deformation of the reinforcement cage and the reinforcing ring of the reinforcement cage under pressure. The adjusting mechanism arranged in the support frame can be positionally locked, thereby facilitating the change of the direction of the inner support mechanism and the disassembly of the entire device.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a construction method for steel-concrete composite inclined piles in river environments with large tidal ranges. Background Technology

[0002] Continuous rigid frame bridges are a type of continuous beam bridge consisting of piers and beams, which is between a beam and an arch. They have advantages such as good integrity, strong seismic resistance, low engineering cost, simple and beautiful bridge shape, and simple and quick construction. However, in river environments with large tidal ranges, the piers of structural bridges need to use steel-concrete composite inclined piles to improve the stability and strength of the bridge.

[0003] Steel-concrete composite inclined piles are widely used in important building foundations such as bridges, tunnels, wharves, and high-rise buildings in situations where the strata are weak and unstable, the groundwater level is high, seismically active areas are located, and high tensile strength is required. The principle is to use underwater steel-concrete composite inclined piles (inclination ratio 1:8) to reinforce weak and poor foundations, improve the bearing capacity and stability of the foundation, reduce the impact of groundwater on the foundation, and thus ensure that the strength, stiffness and stability of the foundation meet the design requirements.

[0004] However, in the construction of steel-concrete composite inclined piles in rivers with large tidal ranges, the reinforcing cage is one of the most important structures. To ensure that the reinforcing cage does not deform during production and construction, internal bracing is usually added during the production process to ensure the rigidity of the reinforcing cage. Traditionally, the internal bracing is achieved by directly welding the reinforcing bars into the reinforcing cage. Before lowering the cage, the reinforcing internal bracing needs to be cut off, which makes installation inconvenient and can easily damage the reinforcing cage. Therefore, this application provides a construction method for steel-concrete composite inclined piles in rivers with large tidal ranges to meet the requirements. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a construction method for steel-concrete composite inclined piles in river environments with large tidal ranges. This method addresses the problem that existing steel cage internal bracing reinforcement mechanisms are made by directly welding steel bars into the steel cage, requiring the removal of the reinforcing internal bracing before lowering, which leads to inconvenient installation and can easily damage the steel cage during cutting.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A construction method for steel-concrete composite inclined piles in a river environment with large tidal range includes:

[0008] S1. Construction preparation: Inspect the construction materials and equipment to ensure that they are qualified and meet the construction requirements, and locate the construction site.

[0009] S2. Steel pipe pile construction: Steel pipe piles are transported to the construction site by barge, anchored and moored with cables for pile supply, and then the pile driving vessel is used for positioning, hoisting, hammering and horizontal connection construction.

[0010] S3. Test pile experiment: Verify whether the bearing capacity of the test pile meets the requirements by using the reverse anchor pile method;

[0011] S4. Hole cleaning construction: Based on geological data and actual site conditions, a high-pressure hole cleaning machine with an end agitator is used to carry out pile pipe hole cleaning construction.

[0012] S5. Construction and installation of steel cage: Weld the steel bars into the required steel cage according to the construction requirements. The steel cage has high rigidity requirements to avoid deformation or disintegration during storage and hoisting. Use a reinforcement mechanism to weigh the steel cage internally to prevent deformation. After welding, the steel cage is lowered to the designated position by barge and crawler crane. Remove the internal reinforcement mechanism of the steel cage. Use the main and auxiliary hooks to adjust the inclination. Hoist the second section of the steel cage and align it with the spliced ​​main bar of the first section. According to the measured and marked lap distance, select the front, back, left and right main bars evenly. First, spot weld them to fix them, and then reinforce them with the steel ring.

[0013] S6. Concrete construction of pile foundation: Conduct a water tightness test on the guide pipe. After the test is completed, insert the guide pipe into the installed steel cage and inject concrete. The amount of concrete poured in the first batch should be sufficient to meet the initial embedment depth of the guide pipe and fill the bottom of the guide pipe.

[0014] S7. Pipe Removal: As the concrete is poured normally, the pipe is removed section by section, ensuring that the pier is buried at a depth of 2 to 6 meters in the concrete. During the removal of the inclined pile pipe, the crawler crane needs to adjust the upward pull angle of the pipe to ensure that the pipe moves along the inclined direction of the pile and prevent pipe jamming.

[0015] Optionally, the internal bracing and reinforcement mechanism of the steel cage includes: a support frame, an adjustment mechanism, and an internal bracing mechanism. The support frame is in the shape of an equilateral triangular frame, and the internal bracing mechanism is disposed on the end faces of the three corners of the support frame to support the steel cage reinforcement ring and prevent the steel cage from being deformed under pressure.

[0016] The adjustment mechanism is located inside the support frame and is used to adjust the position of the inner support mechanism, so as to facilitate the folding of the inner support mechanism and the storage of the entire device.

[0017] Optionally, each of the three corner end faces of the support frame is fixedly connected to a bending bracket, and a rotating shaft is fixedly installed inside the bending bracket. The inner support mechanism includes a connecting protrusion movably installed on the outer wall of the rotating shaft. One end of the connecting protrusion is fixedly connected to an extension rod, one end of the extension rod is fixedly connected to a spring column, one end of the spring column is fixedly connected to a fixing rod, and one end of the fixing rod is fixedly connected to a steel bar support block. The size of the steel bar support block slot matches the size of the steel bar cage reinforcing ring.

[0018] Optionally, three sets of spring sleeves are fixedly connected to the inner wall of the support frame. Each of the three sets of spring sleeves has a pin slidably installed inside. The outer wall of the pin is connected to the spring inside the spring sleeve with a snap-fit. One end of the connecting protrusion is provided with a positioning pin hole. The size of the positioning pin hole matches the size of the spring sleeve, and the spring sleeve is located on the extension line of the axis of the positioning pin hole.

[0019] Optionally, the adjusting mechanism includes an adjusting disc fixedly installed inside the support frame. The adjusting disc has an adjusting cavity inside, and a threaded rotating ring is installed inside the adjusting cavity via a thread. The adjusting disc has three sets of sliding grooves inside, and the sliding direction of the three sets of sliding grooves matches the axis of the three sets of spring sleeves. A push block is slidably installed inside each of the three sets of sliding grooves via a spring slider. The inner wall of the sliding groove is against the outer wall of the adjusting cavity, and a push rod is fixedly connected to the outer wall of the sliding groove. One end of the push rod is fixedly connected to one end of a pin. The sliding groove is trapezoidal in shape.

[0020] Optionally, the adjusting disc has connecting holes at both ends, and the inner wall of the connecting holes has an annular groove and a through groove. The annular groove and the through groove are interconnected. A lever is slidably installed inside the annular groove, and the lever is fixedly connected to the inner wall of the threaded rotating ring.

[0021] Optionally, a plug rod is installed through the connection hole, and an adjusting protrusion is fixed on the outer wall of the plug rod. The size of the adjusting protrusion matches the size of the annular groove and the through groove. An installation mechanism is provided at one end of the plug rod.

[0022] Optionally, the installation mechanism includes an adjusting rod rotatably mounted to one end of the plug rod, a connecting plate fixedly mounted on one end of the adjusting rod, a suspension hook and a warning light fixedly connected to the other end of the connecting plate, the warning light being located on one side of the suspension hook, and a protrusion of the same size as the adjusting protrusion fixed to the outer wall of the adjusting rod.

[0023] Optionally, the contact surface between the bending bracket and the extension rod is semi-circular on one side.

[0024] Optionally, the connector rod is made of hollow tube material.

[0025] Compared with the prior art, the present invention has at least the following beneficial effects:

[0026] In the above scheme, the pressure on the internal support mechanism can be evenly distributed by the support frame in the shape of an equilateral triangular frame, thereby improving the support strength of the internal support mechanism and avoiding the deformation of the steel cage and the steel cage reinforcement ring under pressure.

[0027] The adjustment mechanism located inside the support frame can be locked to limit its position, thereby facilitating changes in the direction of the inner support mechanism and enabling the disassembly of the entire device.

[0028] The adjustment protrusion fixed to the outer wall of the plug-in rod allows for adjustment of the adjustment mechanism by rotating the plug-in rod, thereby releasing the limiting operation of the connecting protrusion. Simultaneously, pulling the plug-in rod and using the adjustment protrusion to pull the adjustment plate can change the position of the support frame, thereby changing the force direction of the extension rod. This allows the connecting protrusion at the bottom of the extension rod to cooperate with the rotating shaft to change the position of the extension rod, causing the entire internal support reinforcement mechanism of the rebar cage to detach from the rebar cage reinforcement ring, facilitating the disassembly of the internal support reinforcement mechanism. Furthermore, the plug-in rod allows for simultaneous adjustment and disassembly operations on multiple rebar cage reinforcement machines. Attached Figure Description

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

[0030] Figure 1 A first-person perspective three-dimensional structural diagram of the construction method of steel-concrete composite inclined piles in a river environment with large tidal range;

[0031] Figure 2 A second-view three-dimensional structural diagram of the construction method of steel-concrete composite inclined piles in a river environment with large tidal range;

[0032] Figure 3 A schematic cross-sectional view of the construction method of steel-concrete composite inclined piles in a river environment with large tidal range;

[0033] Figure 4 A schematic diagram of the steel cage reinforcement ring installation structure for the construction method of steel-concrete composite inclined piles in a river environment with large tidal range.

[0034] Figure 5 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0035] Figure 6 A schematic diagram of the overall installation structure for the construction method of steel-concrete composite inclined piles in a river environment with large tidal range;

[0036] Figure 7 This is a schematic diagram of the installation mechanism.

[0037] [Figure Labels]

[0038] 1. Support frame; 2. Adjustment mechanism; 3. Internal support mechanism; 4. Bending bracket; 5. Rotating shaft; 6. Connecting protrusion; 7. Extension rod; 8. Spring column; 9. Fixing rod; 10. Rebar support block; 11. Spring sleeve; 12. Pin; 13. Positioning pin hole; 14. Adjustment plate; 15. Adjustment cavity; 16. Threaded rotating ring; 17. Sliding groove; 18. Push block; 19. Push rod; 20. Connecting hole; 21. Annular groove; 22. Through groove; 23. Pulling block; 24. Insertion rod; 25. Adjustment protrusion; 26. Installation mechanism; 27. Adjustment rod; 28. Connecting plate; 29. ​​Suspension hook; 30. Warning light.

[0039] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0040] The following describes in detail a construction method for steel-concrete composite inclined piles in a river environment with large tidal range, provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0041] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0042] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0043] It is understood that the meanings of “on”, “above”, and “above” in this invention should be interpreted in the broadest manner, such that “on” means not only “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” means not only “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0044] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0045] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a method for constructing steel-concrete composite inclined piles in a river environment with large tidal range, including...

[0046] S1. Construction preparation: Inspect the construction materials and equipment to ensure that they are qualified and meet the construction requirements, and locate the construction site.

[0047] S2. Steel pipe pile construction: Steel pipe piles are transported to the construction site by barge, anchored and moored with cables for pile supply, and then the pile driving vessel is used for positioning, hoisting, hammering and horizontal connection construction.

[0048] S3. Test pile experiment: Verify whether the bearing capacity of the test pile meets the requirements by using the reverse anchor pile method;

[0049] S4. Hole cleaning construction: Based on geological data and actual site conditions, a high-pressure hole cleaning machine with an end agitator is used to carry out pile pipe hole cleaning construction.

[0050] S5. Construction and installation of steel cage: Weld the steel bars into the required steel cage according to the construction requirements. The steel cage has high rigidity requirements to avoid deformation or disintegration during storage and hoisting. Use a reinforcement mechanism to weigh the steel cage internally to prevent deformation. After welding, the steel cage is lowered to the designated position by barge and crawler crane. Remove the internal reinforcement mechanism of the steel cage. Use the main and auxiliary hooks to adjust the inclination. Hoist the second section of the steel cage and align it with the spliced ​​main bar of the first section. According to the measured and marked lap distance, select the front, back, left and right main bars evenly. First, spot weld them to fix them, and then reinforce them with the steel ring.

[0051] S6. Concrete construction of pile foundation: Conduct a water tightness test on the guide pipe. After the test is completed, insert the guide pipe into the installed steel cage and inject concrete. The amount of concrete poured in the first batch should be sufficient to meet the initial embedment depth of the guide pipe and fill the bottom of the guide pipe.

[0052] S7. Pipe Removal: As the concrete is poured normally, the pipe is removed section by section, ensuring that the pier is buried at a depth of 2 to 6 meters in the concrete. During the removal of the inclined pile pipe, the crawler crane needs to adjust the upward pull angle of the pipe to ensure that the pipe moves along the inclined direction of the pile and prevent pipe jamming.

[0053] The construction process of steel-concrete composite inclined piles includes steel pipe pile construction, pile testing, borehole cleaning, reinforcement cage construction, and pile foundation concrete construction. Steel-concrete composite inclined piles involve pouring concrete into the ground to form a robust pile body. This allows the load to be transferred to deeper strata, effectively increasing the bearing capacity of the pile foundation and enabling it to withstand the loads of the superstructure, meeting the design load requirements of the bridge superstructure. By injecting concrete into the ground, steel-concrete composite inclined piles increase the stability of the foundation. The concrete filling the bidirectional inclined piles provides uniform support, preventing settlement or uneven settlement of the foundation. During the construction of steel-concrete composite inclined piles, the piles have a certain compaction effect on silty soil, and the poured concrete effectively fills the voids in the soil, reducing the soil's moisture content. Improving soil density and consistency meets the construction requirements of pile foundations in silty soil conditions. In deep-water areas with high seismic activity, pile construction increases the stability and stiffness of the foundation, enabling structures to respond well to seismic loads and improving seismic performance. Simultaneously, pile formation increases the foundation's resistance to overturning and sliding, enhancing overall stability. In areas with high groundwater levels, steel-concrete composite inclined piles can be constructed using methods such as casing grouting. The casing prevents water from entering the borehole, preventing concrete from contacting groundwater, thus ensuring concrete quality and strength and reducing the adverse effects of groundwater on the foundation. Furthermore, the reinforced concrete pile material possesses good durability, resisting corrosion and erosion in deep-water environments, contributing to the long-term stability and safety of the pile foundation.

[0054] like Figures 1 to 3 As shown, the internal support and reinforcement mechanism of the steel cage includes: a support frame 1, an adjustment mechanism 2, and an internal support mechanism 3. The support frame 1 is in the shape of an equilateral triangular frame. The internal support mechanism 3 is located on the end faces of the three corners of the support frame 1 and is used to support the steel cage reinforcement ring to prevent the steel cage from being deformed under pressure. The adjustment mechanism 2 is located inside the support frame 1 and is used to adjust the position of the internal support mechanism 3, so as to facilitate the folding of the internal support mechanism 3 and the collection of the entire equipment.

[0055] The support frame 1, which is in the shape of an equilateral triangular frame, can distribute the pressure on the inner support mechanism 3, thereby improving the support strength of the inner support mechanism 3 and preventing the steel cage and the steel cage reinforcement ring from being deformed by pressure. The adjustment mechanism 2, which is set inside the support frame 1, can be limited and locked, thereby facilitating the change of the direction of the inner support mechanism 3 and making the disassembly of the entire device easier.

[0056] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, each of the three corners of the support frame 1 is fixedly connected to a bending bracket 4. A rotating shaft 5 is fixedly installed inside the bending bracket 4. The inner support mechanism 3 includes a connecting protrusion 6 movably mounted on the outer wall of the rotating shaft 5. One end of the connecting protrusion 6 is fixedly connected to an extension rod 7, and one end of the extension rod 7 is fixedly connected to a spring column 8. One end of the spring column 8 is fixedly connected to a fixing rod 9, and one end of the fixing rod 9 is fixedly connected to a steel bar support block 10. The groove size of the steel bar support block 10 matches the size of the steel bar cage reinforcement ring. The steel bar support block 10, fixedly connected to one end of the fixing rod 9, reinforces the steel bar cage reinforcement ring. The inner wall is fitted with a snap-fit ​​support. Pushing the support frame 1, the bending brackets 4 at the three corner ends of the support frame 1, in conjunction with the rotating shaft 5, align the extension rod 7 with the end face of the bending bracket 4, thereby keeping the extension rod 7 and the support frame 1 horizontally aligned and providing support force for the reinforcing ring of the steel cage. During the process of pushing the support frame 1, the spring column 8 between the extension rod 7 and the fixed rod 9 will slightly contract. When the extension rod 7 and the support frame 1 are horizontally aligned, the spring column 8 will spring back to its original position and provide support force for the fixed rod 9. The contraction distance of the spring column 8 will not affect the dimensional change of the reinforcing ring of the steel cage.

[0057] like Figures 1 to 3 As shown, three sets of spring sleeves 11 are fixedly connected to the inner wall of the support frame 1. Each of the three sets of spring sleeves 11 has a pin 12 slidably installed inside. The outer wall of the pin 12 is connected to the spring inside the spring sleeve 11 with a snap fastener. One end of the connecting protrusion 6 is provided with a positioning pin hole 13. The size of the positioning pin hole 13 matches the size of the spring sleeve 11, and the spring sleeve 11 is located on the extended line of the axis of the positioning pin hole 13. The three sets of spring sleeves 11 fixedly connected to the inner wall of the support frame 1 can limit the pin 12. By using the pin 12 to cooperate with the positioning pin hole 13 at one end of the connecting protrusion 6, the connecting protrusion 6 can be limited, thereby preventing the support frame 1 from rotating under force, which would cause the extension rod 7 to shift and cause the steel bar support block 10 to detach from the steel cage reinforcement ring, affecting the internal support effect of the steel cage.

[0058] like Figures 1 to 3As shown, the adjustment mechanism 2 includes an adjustment disc 14 fixedly installed inside the support frame 1. An adjustment cavity 15 is formed inside the adjustment disc 14. A threaded rotating ring 16 is rotatably installed inside the adjustment cavity 15 via a thread. Three sets of sliding grooves 17 are formed inside the adjustment disc 14. The sliding direction of the three sets of sliding grooves 17 matches the axis of the three sets of spring sleeves 11. Push blocks 18 are slidably installed inside each of the three sets of sliding grooves 17 via spring sliders. The inner wall of the sliding groove 17 abuts against the outer wall of the adjustment cavity 15. A push rod 19 is fixedly connected to the outer wall of the sliding groove 17. One end of the push rod 19 is fixedly connected to one end of the pin 12. The sliding groove 17 is trapezoidal in shape. Connecting holes 20 penetrate both ends of the adjustment disc 14. An annular groove 21 and a through groove 22 are formed on the inner wall of the connecting hole 20. The annular groove 21 and the through groove 22 are interconnected. The annular groove 21 contains… A sliding block 23 is installed, which is fixedly connected to the inner wall of the threaded rotating ring 16. By moving the sliding block 23 inside the annular groove 21, the threaded rotating ring 16 can be rotated. The rotating threaded rotating ring 16 will move downward along the internal thread of the adjusting cavity 15, thereby pushing the trapezoidal sliding groove 17 to move. The sliding groove 17 pushes the push rod 19 to move the pin 12, thus completing the operation of limiting the connecting protrusion 6. The setting of the threaded rotating ring 16 will simultaneously push the push blocks 18 in the three sets of sliding grooves 17 to move, so as to complete the locking operation of the three sets of pins 12 simultaneously. At the same time, when the threaded rotating ring 16 is rotated in the opposite direction, the springs in the three sets of spring sleeves 11 will push the pins 12 back to their original positions. In conjunction with the springs in the three sets of sliding grooves 17, the push blocks 18 move in the opposite direction, thus completing the operation of releasing the limiting of the connecting protrusion 6.

[0059] like Figure 6 As shown, a plug rod 24 is installed through the connection hole 20. An adjusting protrusion 25 is fixed on the outer wall of the plug rod 24. The size of the adjusting protrusion 25 matches the size of the annular groove 21 and the through groove 22. An installation mechanism 26 is provided at one end of the plug rod 24. The adjusting protrusion 25 fixed on the outer wall of the plug rod 24 can be adjusted by rotating the plug rod 24 to release the limiting operation of the connecting protrusion 6. At the same time, pulling the plug rod 24 and using the adjusting protrusion 25 to pull the adjusting plate 14 can change the position of the support frame 1, thereby changing the force direction of the extension rod 7. The connecting protrusion 6 at the bottom of the extension rod 7 cooperates with the rotating shaft 5 to change the position of the extension rod 7, so that the entire steel cage internal support reinforcement mechanism is separated from the steel cage reinforcement ring, so as to facilitate the disassembly of the steel cage internal support reinforcement mechanism. At the same time, the plug rod 24 can be used to simultaneously adjust and disassemble multiple steel cage reinforcement machines.

[0060] like Figure 6 and Figure 7As shown, the installation mechanism 26 includes an adjusting rod 27 rotatably mounted to one end of the plug-in rod 24. A connecting plate 28 is fixedly mounted on one end of the adjusting rod 27, and a suspension hook 29 and a warning light 30 are fixedly connected to the other end of the connecting plate 28. The warning light 30 is located on one side of the suspension hook 29. A protrusion of the same size as the adjusting protrusion 25 is fixedly mounted on the outer wall of the adjusting rod 27. The suspension hook 29 is fixedly connected to the other end of the connecting plate 28, which can be used to suspend the plug-in rod 24, making it convenient to remove the internal bracing reinforcement mechanism of the entire steel cage. The warning light 30 fixedly mounted on the other end of the connecting plate 28 can be used to warn of the position of the suspended plug-in rod 24 and guide the rotation direction of the plug-in rod 24.

[0061] like Figures 1 to 5 As shown, the contact surface between the bending bracket 4 and the extension rod 7 is semi-circular on one side, which facilitates the extension rod 7 to rotate in conjunction with the rotating shaft 5 and change the orientation of the extension rod 7.

[0062] The working principle provided by this invention is as follows: During the construction of the reinforcing cage, the reinforcing bar support block 10 is engaged with the inner wall of the reinforcing ring of the reinforcing cage, and the support frame 1 is pushed to keep the support frame 1 horizontally aligned. Then, the adjusting rod 27 at one end of the connecting plate 28 is inserted into the connecting hole 20 of the adjusting plate 14, so that the outer wall of the adjusting rod 27 and the protrusion 25 of the same size slide into the annular groove 21 opened in the inner wall of the connecting hole 20. Rotating the connecting plate 28 drives the adjusting rod 27 to rotate, thereby moving the lever 23. The lever 23 drives the threaded rotating ring 16 to rotate. The rotating threaded rotating ring 16 moves downward along the internal thread of the adjusting cavity 15, thereby pushing the trapezoidal sliding groove 17 to move. The sliding groove 17 pushes the push rod 19 to move the pin 12, completing the alignment of the connecting protrusion. The 6-position limit operation completes the support of the reinforcing ring of the steel cage. According to the production requirements of the steel cage, the internal support and reinforcement mechanism of the steel cage is set inside the multiple reinforcing rings of the steel cage. The plug rod 24 is used to pass through multiple adjusting plates 14 in sequence to complete the internal support and reinforcement operation of the entire steel cage. When the steel cage is installed, the plug rod 24 is rotated in the opposite direction to make the pin 12 disengage from the connecting protrusion 6, thereby releasing the limit operation of the connecting protrusion 6. The plug rod 24 is pulled to use the adjusting protrusion 25 to pull the adjusting plate 14, changing the position of the support frame 1, thereby changing the force direction of the extension rod 7. The connecting protrusion 6 at the bottom of the extension rod 7 cooperates with the rotating shaft 5 to change the position of the extension rod 7, so that the entire reinforcing ring of the steel cage is disengaged from the steel support block 10. Then, the plug rod 24 is pulled away from the entire steel cage.

[0063] In practical application, the support frame 1, which is in the shape of an equilateral triangular frame, can distribute the pressure on the inner support mechanism 3, thereby improving the support strength of the inner support mechanism 3 and preventing the steel cage and the reinforcing ring of the steel cage from being deformed under pressure. The adjustment mechanism 2 set inside the support frame 1 can be limited and locked, thereby facilitating the change of the direction of the inner support mechanism 3 and facilitating the extraction of the entire device from the entire steel cage. This prevents the steel cage from deforming during production and transportation, which would affect the construction and strength of the steel pipe concrete composite inclined pile.

[0064] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0065] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A construction method for steel-concrete composite inclined piles in a river environment with large tidal range, characterized in that, include: S1. Construction preparation: Inspect the construction materials and equipment to ensure that they are qualified and meet the construction requirements, and locate the construction site. S2. Steel pipe pile construction: Steel pipe piles are transported to the construction site by barge, anchored and moored with cables for pile supply, and then the pile driving vessel is used for positioning, hoisting, hammering and horizontal connection construction. S3. Test pile experiment: Verify whether the bearing capacity of the test pile meets the requirements by using the reverse anchor pile method; S4. Hole cleaning construction: Based on geological data and actual site conditions, a high-pressure hole cleaning machine with an end agitator is used to carry out pile pipe hole cleaning construction. S5. Construction and installation of steel cage: Weld the steel bars into the required steel cage according to the construction requirements. The steel cage has high rigidity requirements to avoid deformation or disintegration during storage and hoisting. Use a reinforcement mechanism to internally support the steel cage to prevent deformation. After welding, the steel cage is lowered to the designated position by barge and crawler crane. Remove the internal reinforcement mechanism of the steel cage. Use the main and auxiliary hooks to adjust the inclination. Hoist the second section of the steel cage and align it with the spliced ​​main bar of the first section. According to the measured and marked lap distance, select the front, back, left and right main bars evenly. First, spot weld them to fix them, and then reinforce them with the steel ring. S6. Concrete construction of pile foundation: Conduct a water tightness test on the guide pipe. After the test is completed, insert the guide pipe into the installed steel cage and inject concrete. The amount of concrete poured in the first batch should meet the requirements of the initial embedment depth of the guide pipe and the filling of the bottom of the guide pipe. S7. Pipe Removal: As the concrete is poured normally, the pipe is removed section by section while ensuring that the pier is buried in the concrete at a depth of 2-6m. During the removal of the inclined pile pipe, the crawler crane adjusts the upward pulling angle of the pipe to ensure that the pipe moves along the inclined direction of the pile and prevents the pipe from getting stuck. The internal bracing and reinforcement mechanism for the reinforcing cage includes a support frame, an adjustment mechanism, and an internal bracing mechanism. The support frame is in the shape of an equilateral triangular frame, and the internal bracing mechanism is located at the end faces of the three corners of the support frame to support the reinforcing ring of the reinforcing cage and prevent the reinforcing cage from being deformed under pressure. The adjustment mechanism is located inside the support frame and is used to adjust the position of the inner support mechanism, so as to facilitate the folding of the inner support mechanism and the storage of the entire device. The support frame has a bending bracket fixedly connected to the end face of each of the three corners. A rotating shaft is fixedly installed inside the bending bracket. The inner support mechanism includes a connecting protrusion movably installed on the outer wall of the rotating shaft. An extension rod is fixedly connected to one end of the connecting protrusion. A spring column is fixedly connected to one end of the extension rod. A fixing rod is fixedly connected to one end of the spring column. A steel bar support block is fixedly connected to one end of the fixing rod. The size of the steel bar support block slot matches the size of the steel cage reinforcement ring.

2. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 1, characterized in that, The inner wall of the support frame is fixedly connected with three sets of spring sleeves. Each of the three sets of spring sleeves has a pin slidably installed inside. The outer wall of the pin is connected to the spring inside the spring sleeve with a snap fastener. One end of the connecting protrusion is provided with a positioning pin hole. The size of the positioning pin hole matches the size of the spring sleeve, and the spring sleeve is located on the extension line of the axis of the positioning pin hole.

3. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 2, characterized in that, The adjustment mechanism includes an adjustment disc fixedly installed inside the support frame. The adjustment disc has an adjustment cavity inside, and a threaded rotating ring is installed inside the adjustment cavity via a threaded mechanism. The adjustment disc has three sets of sliding grooves inside, and the sliding direction of the three sets of sliding grooves matches the axis of the three sets of spring sleeves. A push block is slidably installed inside each of the three sets of sliding grooves via a spring slider. The inner wall of the sliding groove is against the outer wall of the adjustment cavity, and a push rod is fixedly connected to the outer wall of the sliding groove. One end of the push rod is fixedly connected to one end of a pin. The sliding groove is trapezoidal in shape.

4. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 3, characterized in that, The adjusting disc has connecting holes at both ends. The inner wall of the connecting holes has an annular groove and a through groove. The annular groove and the through groove are interconnected. A lever is slidably installed inside the annular groove. The lever is fixedly connected to the inner wall of the threaded rotating ring.

5. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 4, characterized in that, A plug rod is installed through the connection hole. An adjusting protrusion is fixed on the outer wall of the plug rod. The size of the adjusting protrusion matches the size of the annular groove and the through groove. An installation mechanism is provided at one end of the plug rod.

6. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 5, characterized in that, The installation mechanism includes an adjusting rod rotatably mounted to one end of the plug rod. A connecting plate is fixedly mounted on one end of the adjusting rod, and a suspension hook and a warning light are fixedly connected to the other end of the connecting plate. The warning light is located on one side of the suspension hook, and a protrusion of the same size as the adjusting protrusion is fixed on the outer wall of the adjusting rod.

7. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 1, characterized in that, The contact surface between the bending bracket and the extension rod is semi-circular on one side.

8. The construction method for steel-concrete composite inclined piles in a river environment with large tidal range according to claim 6, characterized in that, The connector rod is made of hollow tube material.

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