A steel pipe pile construction method using a grooving method

Abstract

The application discloses a kind of steel pipe pile construction methods using grooving method, belong to the technical field of steel pipe pile construction, it includes following specific steps, S1, excavate slot hole;S2, hardening treatment, and slot hole is divided into several units;S3, installation positioning frame, positioning frame has guide surface;S4, to steel pipe pile is guided installation by the guide surface of adjacent two positioning frames;S5, positioning frame is removed and installed to the position when guiding the installation of next steel pipe pile;S6, install wing plate on the outer circumferential surface of the first and last steel pipe pile of the unit;S7, successively to each steel pipe pile of the same unit Pour concrete, then gap between the steel pipe pile in the unit and slot hole is backfilled sand treatment;S8, wherein a unit solidifies, the next unit is constructed.This application has the effect of facilitating to guarantee the perpendicularity and precision of the position when steel pipe pile is installed into slot hole, and then facilitating to finally guarantee the forming quality of the formed steel pipe pile structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel pipe pile construction, and particularly relates to a steel pipe pile construction method using a trenching method. BACKGROUND

[0002] Steel pipe pile construction is a foundation engineering construction technology, which is mainly applied to the foundation reinforcement and stabilization of structures such as bridges, wharfs and buildings, and has the advantages of strong bearing capacity, flexible construction, fast speed and the like. In large bridge, wharf, high-rise building and other infrastructure engineering, or engineering needing to cross rivers, lakes and other water areas, a trenching method is usually used to construct steel pipe piles to quickly form a stable support structure and ensure the smooth progress of the engineering.

[0003] In the prior art, the operation method for constructing steel pipe piles using the trenching method usually first excavates a slot hole with a certain width and depth in a designated area according to design requirements through a trenching machine, then vertically hoists and transports the steel pipe pile into the formed slot hole in sequence, fills the steel pipe pile with concrete, and backfills sand in the gap between the steel pipe pile and the slot hole, so as to finally form a stable steel pipe pile structure.

[0004] In view of the prior art described above, the excavated slot hole is larger than the diameter of the steel pipe pile, and it is inconvenient to ensure the perpendicularity and accuracy of the position of the steel pipe pile when the steel pipe pile is installed into the slot hole, and thus it is inconvenient to ensure the forming quality of the finally formed steel pipe pile structure. SUMMARY

[0005] In order to facilitate the guarantee of the perpendicularity and accuracy of the position of the steel pipe pile when the steel pipe pile is installed into the slot hole, and thus facilitate the final guarantee of the forming quality of the formed steel pipe pile structure, the present application provides a steel pipe pile construction method using a trenching method.

[0006] The steel pipe pile construction method using a trenching method provided by the present application adopts the following technical scheme:

[0007] The application discloses a steel pipe pile construction method adopting a trenching method, and comprises the following steps: S1, digging a trench hole in a designated area of soil according to design requirements; S2, after the trench hole is dug, hardening treatment is performed on the area of the soil close to the trench hole and the side wall of the trench hole close to the soil, and the trench hole is divided into a plurality of units; S3, installing a positioning frame on the hardened ground, the positioning frame being provided with a guide surface matched with the outer circumferential surface of the steel pipe pile; S4, hoisting the steel pipe pile into the trench hole and installing the steel pipe pile by guiding the steel pipe pile through the guide surfaces of the adjacent two positioning frames; S5, after one of the steel pipe piles is installed, the positioning frame is dismounted and installed at the position where the positioning frame is used for guiding the installation of the next steel pipe pile; S6, repeating the steps S4 and S5, and installing the steel pipe piles in one of the units into the trench hole, then installing wing plates on the outer circumferential surfaces of the first and last steel pipe piles in the unit to separate the adjacent two units; S7, pouring concrete into each steel pipe pile in the same unit in sequence, and then backfilling sand into the gap between the steel pipe piles and the trench hole in the unit to realize solidification treatment of the unit; and S8, after the solidification of one of the units, constructing the next unit, and repeating the steps S3 to S7 in the construction process, and the construction is completed after the solidification of each unit in the trench hole.

[0008] By adopting the technical scheme, the guide surface of the positioning frame plays a role in positioning and guiding the installation of the steel pipe pile during the installation of the steel pipe pile into the trench hole, so that the steel pipe pile can be quickly and accurately installed into the designated position, the perpendicularity and accuracy of the position of the steel pipe pile installed into the trench hole can be ensured, and finally the forming quality of the formed steel pipe pile structure can be ensured, in addition, the positioning frame can be fully recycled by being dismounted and then used for guiding the installation of each steel pipe pile in sequence, and the structural strength of each unit after the solidification can be ensured by the solidification of each unit in the trench hole in sequence, so that the forming quality of the formed steel pipe pile structure can be finally ensured.

[0009] Optionally, the positioning frame in the step S3 comprises a frame body and a positioning piece, the frame body is installed on the hardened ground, the positioning piece is provided with two positioning pieces and is slidably connected to the two sides of the frame body in the horizontal direction, the guide surface is provided with two guide surfaces corresponding to the positioning piece and is arranged on the side of the positioning piece away from the frame body, and the frame body is provided with a positioning movement assembly for driving the positioning piece to move towards or away from the frame body.

[0010] By adopting the technical scheme, when the guide surface of the positioning piece has a certain displacement difference with the steel pipe pile after the installation of the frame body, the positioning piece is driven by the positioning movement assembly to move towards or away from the frame body, so that the guide surface of the positioning piece can guide the steel pipe pile at different horizontal positions, and the applicability is high.

[0011] Optionally, the positioning motion assembly includes a positioning screw, a positioning sleeve, a positioning worm gear, and a positioning worm. The positioning sleeve is horizontally rotatably mounted on the frame. One end of the positioning screw is fixedly mounted on the positioning component, and the other end passes through and is threaded into the positioning sleeve. The positioning worm gear is coaxially fixedly mounted on the positioning sleeve. The positioning worm is rotatably mounted on the frame and meshes with the positioning worm gear.

[0012] By adopting the above technical solution, when the positioning worm is rotated by force, the positioning worm wheel drives the positioning sleeve to rotate together. This causes the positioning screw to move towards or away from the frame due to the threaded engagement with the positioning sleeve and the sliding engagement between the positioning component and the frame. The arrangement between the positioning worm wheel and the positioning worm facilitates the reversal of the rotation of the positioning screw, making operation convenient. On the other hand, it also ensures the stability of the position of the positioning screw after rotation through its own self-locking effect.

[0013] Optionally, in step S2, the hardened ground has multiple fixing holes pre-installed along the horizontal direction, and the frame is fixedly installed with multiple positioning fixing plates, one of which is fixed to the hardened ground by an anchor bolt passing through one of the fixing holes.

[0014] By adopting the above technical solution, the connection between the positioning and fixing plate and the hardened ground is convenient and quick, and the positioning frame can be quickly assembled and disassembled, enabling the positioning frame to position different steel pipe piles at different locations.

[0015] Optionally, in step S6, the first and last steel pipe piles of one unit are fixedly installed with limiting plates. The limiting plates are provided in two sets and are respectively set close to the two side walls of the slot. There are two limiting plates in each set facing each other. When one of the wing plates is installed, it is located between the two limiting plates in one set.

[0016] By adopting the above technical solution, the two limiting plates play a positioning role during the installation of the wing plate, thereby facilitating the quick installation of the wing plate to the position when dividing adjacent units.

[0017] Optionally, each of the two limiting plates in each group has a vertically penetrating mounting and positioning groove on one side facing each other. The wing plate has two mounting and positioning parts, which slide and cooperate with the two mounting and positioning grooves respectively.

[0018] By adopting the above technical solution, the cooperation between the mounting positioning part and the mounting positioning groove plays a further guiding role during the installation of the wing plate, making it easier to install the wing plate to the required position more quickly and accurately.

[0019] Optionally, in step S4, two connecting plates are fixedly installed on the outer circumferential surface of the steel pipe pile. The two connecting plates are distributed radially along the steel pipe pile. A first connecting member and a second connecting member are fixedly connected to the side of the two connecting plates away from the steel pipe pile, respectively. The cross-section of the first connecting member is C-shaped, and the cross-section of the second connecting member is circular. The second connecting member of one steel pipe pile is inserted into the first connecting member of the other steel pipe pile. A reinforcing component is provided inside the first connecting member to ensure the structural stability of the first connecting member.

[0020] By adopting the above technical solution, the first connector and the second connector facilitate the rapid and stable connection between two adjacent steel pipe piles, ensuring the connection stability between the two adjacent steel pipe piles. At the same time, the reinforcement components make it less likely for the steel pipe piles to be damaged or deformed due to external forces during installation, thus facilitating the protection of the first connector.

[0021] Optionally, the reinforcement component includes a PVC pipe with a plurality of self-tapping screws threaded to it along its length. Each self-tapping screw is fixed to the opening on the outer circumference of the first connector by spot welding. When installing the next steel pipe pile after the first steel pipe pile is installed, the PVC pipe is removed by the inner support component set on the drill rod of the rotary drilling rig.

[0022] By adopting the above technical solution, the setting of PVC pipe makes the reinforcement structure of steel pipe pile simple, convenient and stable. The setting of internal support component makes it easy to ensure the stress stability when the PVC pipe is removed, and thus it is easy to remove the PVC pipe stably from the first connector of the steel pipe pile by the drill rod of the rotary drilling component. After the PVC pipe is removed, it is easy to directly remove the PVC pipe from the steel pipe pile by the vertical movement of the drill rod of the rotary drilling rig.

[0023] Optionally, the inner support assembly includes an inner support sleeve, an inner support telescopic cylinder, an active connecting rod, a driven connecting rod, and an inner support plate. The inner support sleeve is fixedly installed on the drill rod of the rotary drilling rig. The inner support telescopic cylinder is fixedly installed on the inner support sleeve. Multiple inner support plates are evenly distributed around the axis of the inner support sleeve. Multiple sets of active and driven connecting rods are provided corresponding to the inner support plates. One end of the active connecting rod in each set is rotatably connected to the piston rod of the inner support telescopic cylinder, and the other end is rotatably connected to one of the inner support plates. One end of the driven connecting rod in each set is rotatably connected to one of the inner support plates, and the other end is rotatably connected to the inner support sleeve.

[0024] By adopting the above technical solution, when the inner support telescopic cylinder drives its own piston rod to move, each active connecting rod and driven connecting rod drives each inner support plate to move towards or away from the axis of the inner support sleeve. The setting of the inner support telescopic cylinder makes it convenient and quick for each inner support plate to perform the inner support and fixation operation of the PVC pipe.

[0025] Optionally, the steel pipe pile in step S4 includes a first pipe body and a second pipe body. The second pipe body is coaxially fixed to one end of the first pipe body by welding. A ceramic liner is provided inside the steel pipe pile and is located between the first pipe body and the second pipe body. A reinforcing plate is provided on the outside of the steel pipe pile. Multiple reinforcing plates are distributed circumferentially around the axis of the steel pipe pile. One end of each reinforcing plate is welded to the first pipe body and the other end is welded to the second pipe body.

[0026] By adopting the above technical solutions, the separate structure of the steel pipe pile facilitates the production and transportation of the steel pipe pile. The multiple reinforcing plates help to fully ensure the connection stability of the first and second pipe bodies after welding. The ceramic gasket helps to reduce the erosion of the steel pipe pile by the harsh environment and improve the service life of the steel pipe pile. On the other hand, it helps to reduce the fluid friction of the inner wall of the steel pipe pile and improve the fluid transmission efficiency when concrete is poured inside the steel pipe pile.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The guide surface of the positioning frame plays a positioning and guiding role during the installation of steel pipe piles, which facilitates the quick and accurate installation of steel pipe piles into the designated position. This helps to ensure the verticality and accuracy of the position of the steel pipe piles when they are installed in the slot, and thus helps to ensure the final forming quality of the steel pipe pile structure.

[0029] 2. After the positioning frame is disassembled and assembled, it guides each steel pipe pile in sequence to facilitate the full recycling of the positioning frame. The unit in the slot is solidified in sequence to ensure the structural strength of each individual unit after solidification, thereby further ensuring the forming quality of the formed steel pipe pile structure.

[0030] 3. When there is a certain displacement difference between the guide surface of the positioning component and the steel pipe pile, the positioning component is driven to move towards or away from the frame, so that the guide surface of the positioning component can guide the steel pipe pile at different horizontal positions, which is highly applicable. Attached Figure Description

[0031] Figure 1 This is a top view of the steel pipe pile structure after installation in Embodiment 1 of this application.

[0032] Figure 2 This is a schematic diagram of the main structure of the positioning frame in Embodiment 1 of this application.

[0033] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0034] Figure 4 This is a partially enlarged schematic diagram of the first connector in Embodiment 1 of this application.

[0035] Figure 5 This is a schematic diagram of the internal support component in Embodiment 1 of this application.

[0036] Figure 6 This is an exploded schematic diagram of the steel pipe pile in Embodiment 1 of this application.

[0037] Figure 7 This is a top view of the steel pipe pile after installation in Embodiment 2 of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Slot; 2. Fixing hole; 3. Positioning frame; 301. Frame body; 302. Positioning component; 4. Guide surface; 5. Anchor bolt; 6. Positioning slider; 7. Positioning groove; 8. Positioning screw; 9. Positioning sleeve; 10. Positioning worm gear; 11. Positioning worm; 12. Drive handle; 13. Positioning guide rod; 14. Positioning slide; 15. Steel pipe pile; 151. First pipe body; 152. Second pipe body; 16. Connecting plate; 17. First connecting... 18. Second connecting piece; 19. PVC pipe; 20. Self-tapping screw; 21. Inner support sleeve; 22. Inner support telescopic cylinder; 23. Active connecting rod; 24. Driven connecting rod; 25. Inner support plate; 26. Ceramic gasket; 27. Reinforcing plate; 28. Wing plate; 29. ​​Limiting plate; 30. Mounting positioning groove; 31. Mounting positioning part; 32. Positioning fixing plate; 33. Plug; 34. First plug connector; 35. Second plug connector. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0041] Example 1.

[0042] This application discloses a method for constructing steel pipe piles using the trenching method. (Refer to...) Figure 1 The construction method of steel pipe piles using the trenching method includes the following specific steps: S1, excavating trench 1 in a designated area of ​​the soil according to the design requirements.

[0043] S2, continue to refer to Figure 1 After the trench 1 is excavated, the area of ​​soil near the trench 1 and the sidewall of the trench 1 near the soil are hardened, and the trench 1 is divided into several units; furthermore, multiple fixed holes 2 are pre-set on the hardened ground, which are horizontally distributed along the extension direction of the trench 1.

[0044] S3, refer to Figure 2 and Figure 3A positioning frame 3 is installed on the hardened ground. The positioning frame 3 has a guide surface 4 that is adapted to the outer peripheral surface of the steel pipe pile 15. Specifically, the positioning frame 3 includes a frame body 301 and a positioning component 302. The frame body 301 is fixedly installed with a plurality of positioning fixing plates 32. In this embodiment, the number of positioning fixing plates 32 is selected as two. The two positioning fixing plates 32 are fixed to the hardened ground by anchor bolts 5 that pass through themselves and one of the fixing holes 2 in sequence.

[0045] Reference Figure 3 Two positioning elements 302 are provided and located on both sides of the frame 301 along the horizontal extension direction of the slot 1. Each positioning element 302 is fixedly connected to a positioning slider 6. The frame 301 has two horizontally arranged positioning grooves 7 along the extension direction of the slot 1 on the side facing the positioning elements 302. The two positioning sliders 6 slide and engage in the two positioning grooves 7 respectively, so that the positioning elements 302 and the frame 301 slide and engage. Two guide surfaces 4 are provided corresponding to the positioning elements 302. The two guide surfaces 4 are respectively set on the side of the two positioning elements 302 away from the frame 301, that is, on the side where the two positioning elements 302 are far apart, so as to achieve the guiding function of the steel pipe pile 15 during installation by means of the guide surfaces 4 of the two adjacent positioning frames 3.

[0046] Continue to refer to Figure 3 The frame 301 is equipped with a positioning motion assembly. Two sets of positioning motion assemblies are provided corresponding to the positioning component 302. The positioning motion assembly includes a positioning screw 8, a positioning sleeve 9, a positioning worm wheel 10, and a positioning worm 11. The positioning sleeve 9 is horizontally rotatably mounted on the frame 301. One end of the positioning screw is fixedly mounted on the positioning component 302, and the other end is coaxially threaded through and threaded onto the positioning sleeve 9. The positioning worm wheel 10 is coaxially fixedly mounted on the positioning sleeve 9. The positioning worm 11 is vertically rotatably mounted on the frame 301 and meshes with the positioning worm wheel 10. A drive handle 12 is fixedly connected to the top of the positioning worm 11. When the positioning worm 11 is driven to rotate by the drive handle 12, the positioning worm wheel 10 drives the positioning sleeve 9 to rotate around its own axis, thereby causing the positioning screw to drive the positioning component 302 to move towards or away from the frame 301.

[0047] Reference Figure 2 and Figure 3 To further ensure the stability of the positioning component 302 during movement, positioning guide rods 13 are fixedly connected to the side of the two positioning components 302 that are close to each other. The frame 301 is fixedly installed with two positioning slide cylinders 14 that are horizontally arranged along the extension direction of the slot hole 1. The two positioning guide rods 13 are respectively inserted and slidably fitted into the two positioning slide cylinders 14 to further limit the movement of the positioning component 302.

[0048] S4, see reference Figure 1 and Figure 3The steel pipe pile 15 is hoisted into the slot 1, and the steel pipe pile 15 is guided and installed by the guide surfaces 4 of the two adjacent positioning frames 3. Specifically, two connecting plates 16 are fixedly connected to the outer circumference of the steel pipe pile 15. The two connecting plates 16 are distributed radially along the steel pipe pile 15. When the steel pipe pile 15 is installed in the slot 1, the two connecting plates 16 are located on both sides of the steel pipe pile 15 along the extension direction of the slot 1.

[0049] Continue to refer to Figure 1 and Figure 3 Two connecting plates 16 are respectively fixedly connected to a first connecting member 17 and a second connecting member 18 on the side away from the steel pipe pile 15. The first connecting member 17 has a C-shaped cross-section, and the second connecting member 18 has a circular cross-section. The second connecting member 18 of one steel pipe pile 15 is inserted into the first connecting member 17 of the other steel pipe pile 15. When the steel pipe pile 15 is installed, the second connecting member 18 of the steel pipe pile 15 is inserted into the first connecting member 17, which helps to ensure the connection stability between two adjacent steel pipe piles 15.

[0050] Reference Figure 3 and Figure 4 To ensure structural stability when the first connector 17 is installed into the slot 1 along with the steel pipe pile 15, a reinforcing component is provided inside the first connector 17. Specifically, the reinforcing component includes a PVC pipe 19, which is threaded with two sets of self-tapping screws 20. Multiple self-tapping screws 20 are evenly distributed along the length of each set of PVC pipe 19. Each set of self-tapping screws 20 is spot-welded to the C-shaped opening side of the outer circumference of the first connector 17, thus ensuring the structural stability of the steel pipe pile 15 through the limiting effect of the PVC pipe 19 and the self-tapping screws 20. After the steel pipe pile 15 is installed, the PVC pipe 19 is stably removed from the first connector 17 by the internal support component installed on the rotary drilling rig drill rod.

[0051] Reference Figure 4 and Figure 5 The internal support assembly includes an internal support sleeve 21, an internal support telescopic cylinder 22, an active connecting rod 23, a driven connecting rod 24, and an internal support plate 25. Specifically, the internal support sleeve 21 is fixedly installed on the drill rod of the rotary drilling rig, the cylinder body of the internal support telescopic cylinder 22 is fixedly installed on the internal support sleeve 21, and one end of the piston rod of the internal support telescopic cylinder 22 passes through the outside of the internal support sleeve 21. In this embodiment, the internal support telescopic cylinder 22 is selected as a pneumatic cylinder.

[0052] Reference Figure 5Multiple inner support plates 25 are evenly distributed circumferentially around the axis of the inner support sleeve 21. In this embodiment, three inner support plates 25 are selected. The side of each inner support plate 25 away from the inner support sleeve 21 is arranged in an arc shape that fits against the inside of the PVC pipe 19. Three sets of active connecting rods 23 and driven connecting rods 24 are arranged corresponding to the inner support plates 25. One end of the active connecting rod 23 of each set is rotatably connected to the piston rod of the inner support telescopic cylinder 22, and the other end is rotatably connected to one of the inner support plates 25. One end of the driven connecting rod 24 of each set is rotatably connected to one of the inner support plates 25, and the other end is rotatably connected to the piston rod of the inner support telescopic cylinder 22. The inner support sleeve 21 is dynamically connected so that when the inner support telescopic cylinder 22 drives its piston rod to move, each active connecting rod 23 and driven connecting rod 24 drives each inner support plate 25 to move towards or away from the axis of the inner support sleeve 21. The inner support telescopic cylinder 22 makes it convenient and quick to fix the PVC pipe 19 with the inner support plates 25, and at the same time, it is easy to ensure the stress stability when the PVC pipe 19 is removed. In addition, after the PVC pipe 19 is removed, it can be directly taken out from the steel pipe pile 15 by the vertical movement of the drill rod of the rotary drilling rig, which is highly efficient.

[0053] Reference Figure 6 Furthermore, to facilitate the production and transportation of the steel pipe pile 15, in this embodiment, the steel pipe pile 15 includes a first pipe body 151 and a second pipe body 152. The second pipe body 152 is coaxially fixed to one end of the first pipe body 151 along its length by welding. A ceramic gasket 26 is provided inside the steel pipe pile 15, located between the first pipe body 151 and the second pipe body 152, to reduce the erosion of the connection between the first pipe body 151 and the second pipe body 152 by harsh environments and improve the service life of the steel pipe pile 15. A reinforcing plate 27 is provided on the outside of the steel pipe pile 15. Multiple reinforcing plates 27 are evenly distributed around the axis of the steel pipe pile 15. One end of each reinforcing plate 27 is welded to the first pipe body 151 and the other end is welded to the second pipe body 152, thereby fully ensuring the connection stability of the first pipe body 151 and the second pipe body 152 after welding.

[0054] S5, Review Figure 2 After one steel pipe pile 15 is installed, the positioning frame 3 is removed and installed at the position for guiding the installation of the next steel pipe pile 15. Furthermore, after the two adjacent positioning frames 3 are installed on the hardened ground, they are located on the two side walls of the slot 1 to facilitate stable guidance during the installation of the steel pipe pile 15.

[0055] S6, see reference Figure 1 and Figure 3Repeat steps S4 and S5. After installing the steel pipe piles 15 in one unit into the slot 1, install wing plates 28 on the outer periphery of the first and last steel pipe piles 15 in the unit to separate the two adjacent units. Specifically, the first and last steel pipe piles 15 in one unit are fixedly installed with limiting plates 29. There are two sets of limiting plates 29 distributed along the radial direction of the steel pipe piles 15 and respectively set close to the two side walls of the slot 1. There are two limiting plates 29 in each set. There are four wing plates 28 in one unit. When installing, each wing plate 28 is located between the two limiting plates 29 in one set.

[0056] Reference Figure 3 To further ensure the guiding stability of the wing plate 28 during installation, each set of two limiting plates 29 has a vertically penetrating mounting positioning groove 30 on one side facing each other. The wing plate 28 has two mounting positioning parts 31, which slide and cooperate with the two mounting positioning grooves 30 respectively. When the wing plate 28 is installed between the two limiting plates 29 of one set, the two mounting positioning parts 31 are located in the two mounting positioning grooves 30 respectively, so as to further limit the installation of the wing plate 28.

[0057] S7. Concrete is poured into each steel pipe pile 15 in the same unit in sequence, and then sand is backfilled into the gap between the steel pipe pile 15 and the slot 1 in the unit to achieve the solidification treatment of the unit.

[0058] S8. After one unit is cured, the next unit is constructed. During the construction process, steps S3 to S7 are repeated. When all the units divided in slot 1 are cured, the construction is completed.

[0059] The implementation principle of the steel pipe pile construction method using the trenching method in this application embodiment is as follows: During the construction process, when the steel pipe pile 15 is installed into the trench 1, the guide surface 4 of the two adjacent positioning frames 3 plays a positioning and guiding role for the steel pipe pile 15 during installation, thereby facilitating the quick and accurate installation of the steel pipe pile 15 into the designated position. This helps to ensure the verticality and accuracy of the position of the steel pipe pile 15 when it is installed into the trench 1, and thus facilitates the final quality of the formed steel pipe pile 15 structure. In addition, the positioning frame 3 is disassembled and assembled to guide each steel pipe pile 15 in sequence, which facilitates the full recycling of the positioning frame 3. The unit in the trench 1 is solidified in sequence to ensure the structural strength of each individual unit after solidification, thereby further ensuring the final quality of the formed steel pipe pile 15 structure.

[0060] Example 2.

[0061] The main difference between this embodiment and Embodiment 1 is that, in step S6, after installing the wing plates 28 on the outer periphery of the first and last steel pipe piles of one unit, a plug 33 is then installed to further ensure the stability of the position of the wing plates 28 when separating adjacent units. Specifically, two plugs 33 are provided, and after installation, the two plugs 33 respectively abut against the side of each wing plate 28 facing the steel pipe pile of the other unit to stably limit the position of the wing plates 28.

[0062] Furthermore, the two plugs 33 are respectively fixedly connected with a first plug connector 34 and a second plug connector 35. The first plug connector 34 and the second plug connector 35 have the same structure as the first connector 17 and the second connector 18, so that the first plug connector 34 and the second plug connector 35 can fully ensure their own positional stability through the plug-in cooperation with the second connector 18 and the first connector 17, respectively.

[0063] The implementation principle of Embodiment 2 of this application is the same as that of Embodiment 1, so it will not be described again here.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for constructing steel pipe piles using the trenching method, characterized in that: The specific steps include the following: S1, excavating a trench (1) in a designated area of ​​the soil according to the design requirements; S2, after the trench (1) is excavated, hardening the area of ​​the soil near the trench (1) and the sidewall of the trench (1) near the soil, and dividing the trench (1) into several units; S3, installing a positioning frame (3) on the hardened ground, the positioning frame (3) having a guide surface (4) that is compatible with the outer circumference of the steel pipe pile (15); S4, hoisting the steel pipe pile (15) into the trench (1), and guiding the installation of the steel pipe pile (15) through the guide surface (4) of two adjacent positioning frames (3); S5, after one steel pipe pile (15) is installed, removing the positioning frame (3) and installing it in the position where it was used to guide the installation of the next steel pipe pile (15); S6. Repeat steps S4 and S5. After installing the steel pipe piles (15) in one unit into the slot (1), install wing plates (28) on the outer periphery of the first and last steel pipe piles (15) of the unit to separate the two adjacent units. S7. Pour concrete into each steel pipe pile (15) in the same unit in sequence, and then backfill sand into the gap between the steel pipe piles (15) and the slot (1) in the unit to achieve the curing treatment of the unit. S8. After one unit is cured, the next unit is constructed. Repeat steps S3 to S7 during the construction process. When all the units divided in the slot (1) are cured, the construction is completed. The positioning frame (3) in step S3 includes a frame (301) and positioning components (302). The frame (301) is installed on the hardened ground. There are two positioning components (302) that slide and engage with each other on both sides of the frame (301) in the horizontal direction. There are two guide surfaces (4) corresponding to the positioning components (302) and they are respectively located on the side of the two positioning components (302) away from the frame (301). The frame (301) is provided with a positioning motion component that drives the positioning components (302) to move toward or away from the frame (301). Two connecting plates (16) are fixedly installed on the outer periphery of the steel pipe pile (15) in step S4. The two connecting plates (16) are distributed radially along the steel pipe pile (15). A first connecting member (17) and a second connecting member (18) are fixedly connected to the side of the two connecting plates (16) away from the steel pipe pile (15), respectively. The cross-section of the first connecting member (17) is C-shaped, and the cross-section of the second connecting member (18) is circular. The second connecting member (18) of one steel pipe pile (15) is inserted into the first connecting member (17) of the other steel pipe pile (15). The first connecting member (17) is provided with a reinforcing component to ensure the structural stability of the first connecting member (17). The reinforcement component includes a PVC pipe (19), which is threaded with a number of self-tapping screws (20) distributed along its own length. Each of the self-tapping screws (20) is fixed to the opening on the outer periphery of the first connector (17) by spot welding. When installing the next steel pipe pile (15) after one steel pipe pile (15) is installed, the PVC pipe (19) is removed by the inner support component set on the drill rod of the rotary drilling rig. The inner support assembly includes an inner support sleeve (21), an inner support telescopic cylinder (22), an active connecting rod (23), a driven connecting rod (24), and an inner support plate (25). The inner support sleeve (21) is fixedly installed on the drill rod of the rotary drilling rig. The inner support telescopic cylinder (22) is fixedly installed on the inner support sleeve (21). Multiple inner support plates (25) are evenly distributed around the axis of the inner support sleeve (21). Multiple sets of active connecting rods (23) and driven connecting rods (24) are correspondingly arranged with the inner support plates (25). One end of the active connecting rod (23) of each set is rotatably connected to the piston rod of the inner support telescopic cylinder (22), and the other end is rotatably connected to one of the inner support plates (25). One end of the driven connecting rod (24) of each set is rotatably connected to one of the inner support plates (25), and the other end is rotatably connected to the inner support sleeve (21).

2. The method for constructing steel pipe piles using the trenching method according to claim 1, characterized in that: The positioning motion assembly includes a positioning screw (8), a positioning sleeve (9), a positioning worm gear (10), and a positioning worm (11). The positioning sleeve (9) is horizontally rotatably mounted on the frame (301). One end of the positioning screw (8) is fixedly mounted on the positioning component (302), and the other end passes through and is threaded into the positioning sleeve (9). The positioning worm gear (10) is coaxially fixedly mounted on the positioning sleeve (9). The positioning worm (11) is rotatably mounted on the frame (301) and meshes with the positioning worm gear (10).

3. The method for constructing steel pipe piles using the trenching method according to claim 1, characterized in that: In step S2, the hardened ground has multiple fixing holes (2) distributed in the horizontal direction. The frame (301) is fixedly installed with multiple positioning fixing plates (32). One of the positioning fixing plates (32) is fixed to the hardened ground by an anchor bolt (5) passing through one of the fixing holes (2).

4. The method for constructing steel pipe piles using the trenching method according to claim 1, characterized in that: In step S6, the first and last steel pipe piles (15) of one unit are fixedly installed with limiting plates (29). The limiting plates (29) are provided in two sets and are respectively set close to the two side walls of the slot (1). Each set of the limiting plates (29) has two plates facing each other. When one of the wing plates (28) is installed, it is located between the two limiting plates (29) of one set.

5. A method for constructing steel pipe piles using the trenching method according to claim 4, characterized in that: Each of the two limiting plates (29) in each group has a vertically penetrating mounting and positioning groove (30) on one side facing each other. The wing plate (28) has two mounting and positioning parts (31), which slide and cooperate with the two mounting and positioning grooves (30) respectively.

6. A method for constructing steel pipe piles using the trenching method according to claim 1, characterized in that: The steel pipe pile (15) in step S4 includes a first pipe body (151) and a second pipe body (152). The second pipe body (152) is coaxially fixed to one end of the first pipe body (151) by welding. A ceramic liner (26) is provided inside the steel pipe pile (15). The ceramic liner (26) is located between the first pipe body (151) and the second pipe body (152). A reinforcing plate (27) is provided on the outside of the steel pipe pile (15). Multiple reinforcing plates (27) are distributed circumferentially around the axis of the steel pipe pile (15). One end of each reinforcing plate (27) is welded to the first pipe body (151) and the other end is welded to the second pipe body (152).

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