Precise positioning and pile foundation pouring latticed column construction method capable of preventing guide pipe from being clamped

Abstract

The invention discloses an accurate positioning and pile foundation pouring latticed column construction method for preventing a guide pipe from being clamped. A latticed column structure accurately positioned on a pile foundation comprises a latticed column body and a tail end reinforcement cage, and the tail end reinforcement cage is fixedly connected with the latticed column body; the latticed column body is further provided with a plurality of universal wheels used for abutting against the inner wall of the steel casing so as to position the relative position between the latticed column body and the steel casing. The invention discloses a latticed column construction method capable of achieving precise positioning and preventing a guide pipe from being clamped in pile foundation pouring. The latticed column construction method comprises the following steps that 1, a tail end reinforcement cage and a latticed column body are manufactured; 2, a steel casing is buried, and a pile hole is excavated; 3, pile holes are cleaned; 4, a reinforcement cage is hoisted and placed into the pile hole, and then a tail end reinforcement cage and a latticed column body are hoisted and placed into the pile hole at the same time; 5, a guide pipe is lowered, and a pile foundation is poured; 6, pulling out the steel casing; and 7, pile foundation detection. The method has the effects that the accuracy of positioning the latticed column in the middle of the pile foundation is improved, and the guide pipe is prevented from being clamped into the latticed column.

Description

Technical Field

[0001] The invention relates to the field of foundation pit engineering facilities, and in particular to a lattice column construction method for accurate positioning and pile foundation pouring to prevent conduit pipe jam. Background Art

[0002] Deep foundation pit projects usually adopt a support form that combines underground continuous walls, internal supports and column piles. The upper part of the column pile is a lattice column, and the lower part is a bored cast-in-place pile. The diameter of the column pile is generally 1000mm, and the cross-section of the lattice column is usually a small cross-section of about 500mm*500mm. The lattice column is the supporting structure of the deep foundation pit support. The lattice column can increase the overall stiffness of the deep foundation pit support, reduce the deformation and vibration of the structure, and thus improve the seismic and wind resistance of the deep foundation pit support.

[0003] The construction method of column piles is usually to first excavate a pile hole in the soil layer at the bottom of a deep foundation pit, and use a steel casing to support the side walls of the pile hole to prevent water in the side wall soil and the soil layer from flowing into the pile hole; then install a steel cage into the pile hole, and then install a lattice column into the pile hole; then lower the guide tube from the lattice column into the steel casing, pour the pile foundation of the column pile, and after the pile foundation solidifies and takes shape, the lattice column is fixed in the middle position of the pile foundation.

[0004] When welding the lattice column and the steel cage, there will be a verticality deviation problem due to the inconsistency between the elevation of the lattice column lifting hole and the length of the wire rope. At the same time, there will inevitably be a certain degree of position deviation during the lowering process, which will cause the lattice column to deviate from the preset position after the pile foundation is solidified, which can easily cause the lattice column to have a reduced bearing capacity, and then cause the stability of the support in the foundation pit to be reduced. Therefore, there is still room for improvement. Summary of the invention

[0005] In order to improve the accuracy of positioning the lattice column in the middle of the pile foundation, the present application provides a lattice column construction method for accurate positioning and pile foundation casting to prevent conduit pipe jamming.

[0006] In the first aspect, the present application provides a lattice column structure accurately positioned on a pile foundation, which adopts the following technical solution: A lattice column structure accurately positioned on a pile foundation, comprising a lattice column body and an end steel cage, wherein the end steel cage is the steel cage at the top of the pile foundation, the lattice column body is composed of four main angle steels respectively arranged at the four corners of the lattice column body and a gusset plate arranged on the main angle steels, the lattice column body is arranged in the end steel cage, the gusset plate is provided with connecting steel bars, one end of the connecting steel bars is fixedly arranged on the end steel cage, so as to fix the end steel cage and the lattice column body in connection; and the intersection of diagonals at the same length position of the lattice column body is located on the axis of the end steel cage, so as to set the lattice column body in the middle position of the end steel cage; the lattice column body is also provided with a plurality of universal wheels, so as to abut against the inner wall of a steel casing and thereby locate the relative position between the lattice column body and the steel casing.

[0007] By adopting the above technical solution, the lattice column body is first set on the terminal steel cage, so that when the lattice column body and the terminal steel cage are hoisted into the pile hole together, the terminal steel cage is installed on the steel cage in the steel casing and fixed to the middle position of the steel casing. After the pile foundation is poured and solidified, the lattice column body is fixed to the middle position of the pile foundation, thereby improving the accuracy of positioning the lattice column body in the middle position of the pile foundation; at the same time, the work of fixing the lattice column body and the steel cage in the steel casing during the installation process to the steel casing is reduced. At the same time, a universal wheel is set on the lattice column body to abut the inner wall of the steel casing, thereby fixing the relative position between the lattice column body and the steel casing, reducing the deviation of the terminal steel cage from the preset position due to shaking, resulting in the deviation of the lattice column body from the preset position, which is conducive to further improving the accuracy of positioning the lattice column body in the middle position of the pile foundation. At the same time, the universal wheel reduces the friction between the lattice column body and the steel casing, thereby improving the stability of the lattice column body and the terminal steel cage during the installation process to the steel casing.

[0008] Preferably, the main angle steel is fixed with a plurality of fixing rods, and the plurality of fixing rods are located in the end steel bar cage, and the plurality of fixing rods are evenly distributed along the length direction of the portion of the main angle steel located in the end steel bar cage, and the ends of the plurality of fixing rods away from the main angle steel all extend out of the end steel bar cage, and the length direction of the fixing rods is located in the length direction of the diagonal of the main angle steel fixed thereto; and the plurality of universal wheels are respectively arranged at the ends of the plurality of fixing rods away from the main angle steel, so as to slide the lattice column body and the end steel bar cage onto the inner wall of the steel casing.

[0009] By adopting the above technical scheme, the universal wheel and the lattice column body are connected by using a fixing rod, and at the same time, the spacing between the universal wheel and the four corners of the lattice column body is limited by the fixing rod, so that when the lattice column body and the end steel cage are placed under the steel casing, the lattice column body can be positioned in the middle position of the steel casing, which is easy to operate and is conducive to improving the efficiency of installing the lattice column body and the end steel cage.

[0010] Preferably, a positioning angle steel is fixedly provided at one end of the fixing rod close to the lattice column body, and the fixing rod is located in the middle position of the positioning angle steel along the length direction, and the positioning angle steel is fixedly provided on the main body angle steel; and the two ends of the positioning angle steel respectively abut against the supporting plates close to the positioning angle steel to locate the relative position between the fixing rod and the lattice column body.

[0011] By adopting the above technical solution, the length direction of the fixing rod can be positioned on the diagonal line of the lattice column body by attaching the positioning angle steel to the main angle steel, reducing the situation where the position of the fixing rod is manually adjusted when the fixing rod is welded to the lattice column body, resulting in a gap between some universal wheels and the steel casing, thereby reducing the accuracy of the lattice column body being installed in the middle position of the steel casing, and facilitating the installation of the fixing rod to the lattice column body. At the same time, the two ends of the positioning angle steel abut against the gusset plate close to the positioning, and the fixing rod is located in the middle position of the positioning angle steel along the length direction, further improving the accuracy of the fixing rod being installed to the lattice column body.

[0012] Preferably, the connecting rod of the universal wheel is provided with an external thread, and the fixing rod is provided with a connecting nut for detachably mounting the universal wheel on the fixing rod.

[0013] By adopting the above technical solution, when pouring the pile foundation, the universal wheel on the top of the steel casing can be removed and then reused, which is conducive to the recycling and saving of resources.

[0014] Preferably, a connecting angle steel is provided at the end of the main angle steel extending out of the end steel cage, and the connecting angle steel is partially arranged in the lattice column body, and the two side walls on the outer side of the connecting angle steel respectively abut against the two side walls on the inner side of the main angle steel, so as to locate the relative position of the next lattice column body and the current lattice column body.

[0015] By adopting the above technical solution, the lattice column body fixed to the end steel reinforcement cage is positioned, and then the next lattice column body is positioned using the connecting angle steel, thereby improving the accuracy of the connected lattice column in the middle of the pile foundation; and it is easy to operate, which is conducive to improving the installation efficiency of the lattice column body.

[0016] Preferably, the connecting angle steel is arranged obliquely away from the outer side wall of the lattice column body, and the inclined surface is arranged obliquely from an end away from the lattice column body toward a direction close to the lattice column body.

[0017] By adopting the above technical solution, when the next lattice column body is installed into the current lattice column body, the bottom of the next lattice column body is inserted into the inclined surface of the connecting angle steel of the current lattice column body, so that the next lattice column body slides into the current lattice column body, thereby improving the efficiency of installing the next lattice column body.

[0018] Preferably, the main angle steel is fixedly provided with anti-stuck steel bars at the end of the terminal steel cage, one end of the anti-stuck steel bars is provided on the inner wall of the main angle steel, and the other end is provided on the terminal steel cage, and anti-stuck steel bars are fixedly provided on both inner walls of the main angle steel, respectively, to prevent the conduit used for injecting concrete slurry into the steel casing from being stuck in the lattice column body when being lifted up.

[0019] By adopting the above technical solution, the bottom of the lattice column body and the end steel cage are connected by anti-stuck steel bars, so that when the conduit is lifted up, it is restricted by the anti-stuck steel bars and is difficult to get stuck in the bottom of the lattice column body, thereby reducing construction obstacles.

[0020] In the second aspect, the present application provides a lattice column construction method for accurate positioning and pile foundation pouring to prevent conduit jamming, which adopts the following technical solution: A lattice column construction method for accurate positioning and pile foundation pouring to prevent conduit jamming comprises the following steps: Step 1: Make the end reinforcement cage and lattice column body; Step 2: bury the steel casing and dig the pile hole; Step 3: Clean the pile hole; Step 4: Hang the steel cage into the pile hole, and then hang the end steel cage and the lattice column body into the pile hole at the same time; Step 5: Lower the guide tube and pour the pile foundation; Step 6: Pull out the steel casing; Step 7: Pile foundation testing.

[0021] By adopting the above technical solution, the terminal reinforcement cage and the lattice column body are hoisted into the pile hole at the same time, thereby improving the efficiency of hoisting the lattice column body into the pile hole.

[0022] Preferably, in step 5, the guide tube is first lowered, and then the universal wheel located at the opening of the pile hole is removed, and then the pile foundation is poured.

[0023] By adopting the above technical solution, after the lattice column body is hoisted into the steel casing, the universal wheel at the opening of the pile hole is dismantled and then recycled, thereby saving resources and reducing the impact on the stability of the lattice column body.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting connecting steel bars to connect the lattice column body with the end steel cage and universal wheels, when the lattice column body and the end steel cage are hoisted into the pile hole together, the end steel cage is installed on the steel cage in the steel casing and fixed to the middle position of the steel casing. After the pile foundation is poured and solidified, the lattice column body is fixed to the middle position of the pile foundation, thereby improving the accuracy of positioning the lattice column body in the middle position of the pile foundation; at the same time, the work of fixing the lattice column body and the steel cage in the steel casing during the installation process to the steel casing is reduced. At the same time, the situation that the end steel cage deviates from the preset position due to shaking, causing the lattice column body to deviate from the preset position, is conducive to further improving the accuracy of positioning the lattice column body in the middle position of the pile foundation. At the same time, the friction between the lattice column body and the steel casing is reduced, thereby improving the stability of the lattice column body and the end steel cage during the installation process to the steel casing.

[0025] 2. By setting the fixing rod and the positioning angle steel, when the lattice column body and the end steel cage are placed under the steel casing, the lattice column body can be positioned in the middle position of the steel casing, which is easy to operate and is beneficial to improving the efficiency of installing the lattice column body and the end steel cage; at the same time, it reduces the situation where the position of the fixing rod is manually adjusted when the fixing rod is welded to the lattice column body, resulting in a gap between some universal wheels and the steel casing, thereby reducing the accuracy of the lattice column body being installed in the middle position of the steel casing, and facilitates the installation of the fixing rod to the lattice column body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of a lattice column structure accurately positioned on a pile foundation according to an embodiment of the present application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Figure 3 yes Figure 1 Enlarged view of part B in the middle.

[0029] Figure 4 yes Figure 1 Enlarged view of part C in the middle.

[0030] Figure 5 It is a schematic diagram of the structure in which the fixed rod and the universal wheel are separated in the embodiment of the present application.

[0031] Description of reference numerals: 1. Lattice column body; 11. Main angle steel; 12. Tie plate; 13. Connecting steel bars; 14. Connecting angle steel; 15. Anti-stuck steel bars; 2. End steel cage; 21. Vertical bars; 22. Horizontal bars; 3. Universal wheel; 31. Fixing rod; 311. Positioning angle steel; 312. Connecting nut; 313. Limiting plate. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] Example 1 The present application embodiment discloses a lattice column structure accurately positioned on a pile foundation. Figure 1 as well as Figure 2 The lattice column structure precisely positioned on the pile foundation includes a lattice column body 1 and an end steel cage 2. The end steel cage 2 is the steel cage at the top of the pile foundation. As the last section of the steel cage installed on the pile foundation, the end steel cage 2 is composed of a number of vertical bars 21 and a number of transverse bars 22. The transverse bars 22 are in a circular ring shape and are sleeved on the vertical bars 21. The lattice column body 1 is composed of four main angle steels 11 and a number of gussets 12 fixed on the main angle steels 11. The four main angle steels 11 are respectively located at the four corners of the lattice column body 1, and the two ends of the four main angle steels 11 along the length direction are flush, so that the cross section of the lattice column body 1 along the length direction is square. The gussets 12 are fixed to the outer side walls fixed to the four main angle steels 11, and the gussets 12 are evenly distributed along the length direction of the main angle steels 11, so that the gussets 12 are evenly distributed in several layers along the length direction of the lattice column body 1, and the gussets 12 of the same layer are flush on both sides along the width direction. The lattice column body 1 is partially located in the end steel cage 2. In this embodiment, half of the lattice column body 1 along the length direction is located in the end steel cage. The gusset plate 12 located in the end steel cage 2 is fixed with a connecting steel bar 13. One end of the connecting steel bar 13 is fixed to the side of the gusset plate 12 away from the main angle steel 11, and the other end is fixed to the transverse reinforcement 22, so that the lattice column body 1 is fixedly connected to the end steel cage 2. The intersection of the diagonals at the same length position of the lattice column body 1 is located on the axis of the end steel cage 2, so that the lattice column body 1 is fixed to the middle position of the end steel cage 2, and then when the pile foundation is cast, the lattice column body 1 is located in the middle position of the pile foundation.

[0034] Reference Figure 1 as well as Figure 2The lattice column body 1 is also fixed with a plurality of fixing rods 31. In this embodiment, the fixing rods 31 are cylindrical rod-shaped. A positioning angle steel 311 is fixed to one end of the fixing rod 31 along the length direction, and the end of the fixing rod 31 along the length direction is fixed to the right angle line of the outer wall of the positioning angle steel 311. The fixing rod 31 is located in the middle position of the positioning angle steel 311 along the length direction, and the axial direction of the fixing rod 31 is consistent with the length direction of the center line of the right angle of the positioning angle steel 311. The two inner side walls of the positioning angle steel 311 are respectively fixed to the two outer side walls of the main body angle steel 11, so that the fixing rod 31 is fixed to the main body angle steel 11, and the length direction of the fixing rod 31 is located in the length direction of the diagonal line of the main body angle steel 11 fixed thereto. The two ends of the positioning angle steel 311 along the length direction respectively abut against the gusset plate 12 close to the positioning angle steel 311, so that the relative position between the fixing rod 31 and the lattice column body 1 can be simultaneously positioned when the positioning angle steel 311 is fixed to the main body angle steel 11.

[0035] Reference Figure 1 as well as Figure 2 Each main angle steel 11 is respectively fixed with three sections of positioning angle steel 311, and the three sections of angle steel are evenly distributed along the length direction of the part of the main angle steel 11 located in the end steel cage 2, so that all the fixing rods 31 are evenly distributed in three layers along the length direction of the part of the lattice column body 1 located in the end steel cage 2, and the four fixing rods 31 in the same layer are at the same length position of the lattice column body 1.

[0036] Reference Figure 2 as well as Figure 5 The end of the fixing rod 31 away from the main angle steel 11 extends out of the steel mesh cage, and the end away from the main angle steel 11 is detachably installed with a universal wheel 3, so that the lattice column body 1 and the terminal steel cage 2 slide on the inner wall of the steel casing (not shown in the figure) in the soil layer, and the four fixing rods 31 of the same layer are at the same length position of the lattice column body 1, so that the universal wheels 3 arranged on the two layers of fixing rods 31 can limit the lattice column body 1 from falling along the axial direction of the steel casing, and limit the lattice column body 1 to be located in the middle position of the steel casing, further improving the accuracy of the lattice column body 1 being located in the middle position of the pile foundation after the pile foundation is cast.

[0037] Reference Figure 2 as well as Figure 5 The connecting rod of the universal wheel 3 is provided with an external thread, and the fixing rod 31 is movably connected with a connecting nut 312. The universal wheel 3 and the fixing rod 31 are threadedly connected through the connecting nut 312, so that the universal wheel 3 can be detachably mounted on the fixing rod 31. A limiting plate 313 is fixed to the end of the fixing rod 31 away from the main angle steel 11, and the limiting plate 313 limits the connecting nut 312 from being separated from the fixing rod 31.

[0038] Reference Figure 1 as well as Figure 3A connecting angle steel 14 is fixed to the end of the main angle steel 11 outside the terminal steel cage 2, and the two outer side walls of the connecting angle steel 14 respectively abut the two inner side walls of the main angle steel 11, and the connecting angle steel 14 partially extends out of the lattice column body 1, so that when the next lattice column body 1 is installed to the current lattice column body 1, it is convenient to quickly locate the relative position of the next lattice column body 1 and the current lattice column body 1, and improve the accuracy of installing the next lattice column body 1 to the current lattice column body 1.

[0039] Reference Figure 1 as well as Figure 4 The connecting angle steel 14 is inclined away from the outer side wall of the lattice column body 1, and the inclined surface is inclined from the end away from the lattice column body 1 toward the direction close to the lattice column body 1, so that during the installation of the next lattice column body 1 to the current lattice column body 1, the bottom of the next lattice column body 1 slides toward the current lattice column body 1 through the inclined surface of the connecting angle steel 14, thereby improving the efficiency of installing the next lattice column body 1 to the current lattice column body 1.

[0040] An anti-stuck steel bar 15 is fixed to the end of the main angle steel 11 located at the end of the terminal steel cage 2. One end of the anti-stuck steel bar 15 is arranged on the inner wall of the main angle steel 11, and the other end is fixed to the terminal steel cage 2. Anti-stuck steel bars 15 are respectively fixed to the inner walls of both sides of the main angle steel 11 to prevent the conduit used to inject concrete slurry into the steel casing from being stuck in the lattice column body 1 when being lifted up.

[0041] The implementation principle of a lattice column structure accurately positioned on a pile foundation in the embodiment of the present application is as follows: When the end steel cage 2 needs to be installed on the steel casing, first hoist the end steel cage 2 and the lattice column body 1 above the steel casing, then connect the end steel cage 2 with the previous steel cage, then lower the end steel cage 2 and the lattice column body 1 to the steel casing, and slide the universal wheel 3 against the inner wall of the steel casing. When the universal wheel 3 installed on the two-layer fixed rod 31 slides against the inner wall of the steel casing, the universal wheel 3 and the fixed rod 31 automatically adjust the lattice column body 1 to the middle position of the steel casing. Then lower the guide tube into the lattice column body 1, inject concrete slurry into the steel casing, and gradually lift the guide tube. The anti-stuck steel bar 15 limits the guide tube from being stuck in the bottom of the lattice column body 1; after the concrete slurry in the steel casing solidifies, the pile foundation of the column pile is made, and the lattice column body 1 is located in the middle position of the pile foundation. Then pull out the steel casing.

[0042] Example 2 The present application embodiment discloses a lattice column construction method for accurate positioning and pile foundation pouring to prevent conduit jamming, comprising the following steps: Step 1: According to the drawings, make the end reinforcement cage 2 and the lattice column body 1, and connect the lattice column body 1 and the end reinforcement cage 2 using the connecting reinforcement 13 and the anti-stuck reinforcement 15.

[0043] Step 2: Bury the steel casing and then use a rotary drilling rig to dig the pile hole.

[0044] Step 3: Clean the post hole.

[0045] Step 4: Hang the steel cage into the pile hole, and then hang the end steel cage 2 and the lattice column body 1 into the pile hole at the same time, and the universal wheel 3 slides against the inner wall of the steel casing. When the universal wheel 3 installed on the two-layer fixed rod 31 slides against the inner wall of the steel casing, the universal wheel 3 and the fixed rod 31 automatically adjust the lattice column body 1 to the middle position of the steel casing.

[0046] Step 5: first remove the universal wheel 3 at the opening of the pile hole, then lower the guide tube into the lattice column body 1, inject concrete slurry into the steel casing, and then gradually lift the guide tube. The anti-stuck steel bars 15 limit the guide tube from being stuck in the bottom of the lattice column body 1.

[0047] Step 6: Pull out the steel casing.

[0048] Step 7: Pile foundation testing.

[0049] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lattice column structure precisely positioned on a pile foundation, characterized in that: The invention comprises a lattice column body (1) and an end steel cage (2), wherein the end steel cage (2) is the steel cage at the top of the pile foundation, the lattice column body (1) is composed of four main angle steels (11) respectively arranged at the four corners of the lattice column body (1) and a gusset plate (12) arranged on the main angle steels (11), the lattice column body (1) is arranged in the end steel cage (2), the gusset plate (12) is provided with a connecting steel bar (13), one end of the connecting steel bar (13) is fixedly arranged on the The lattice column body (1) is provided with a plurality of universal wheels (3) on the end steel cage (2) for abutting against the inner wall of the steel casing to locate the relative position between the lattice column body (1) and the steel casing.

2. A lattice column structure accurately positioned on a pile foundation according to claim 1, characterized in that: The main angle steel (11) is fixedly provided with a plurality of fixing rods (31), the plurality of fixing rods (31) are located in the terminal steel cage (2), and the plurality of fixing rods (31) are evenly distributed along the length direction of the portion of the main angle steel (11) located in the terminal steel cage (2), the ends of the plurality of fixing rods (31) away from the main angle steel (11) all extend out of the terminal steel cage (2), and the length direction of the fixing rods (31) is located in the length direction of the diagonal of the main angle steel (11) fixed thereto; and the plurality of universal wheels (3) are respectively arranged at the ends of the plurality of fixing rods (31) away from the main angle steel (11), so as to slide the lattice column body (1) and the terminal steel cage (2) onto the inner wall of the steel casing.

3. A lattice column structure accurately positioned on a pile foundation according to claim 2, characterized in that: A positioning angle steel (311) is fixedly arranged at one end of the fixing rod (31) close to the lattice column body (1), and the fixing rod (31) is located at the middle position of the positioning angle steel (311) along the length direction, and the positioning angle steel (311) is fixedly arranged on the main body angle steel (11); and the two ends of the positioning angle steel (311) respectively abut against the gusset plate (12) close to the positioning angle steel (311) to locate the relative position between the fixing rod (31) and the lattice column body (1).

4. A lattice column structure accurately positioned on a pile foundation according to any one of claims 2-3, characterized in that: The connecting rod of the universal wheel (3) is provided with an external thread, and the fixing rod (31) is provided with a connecting nut (312) for detachably mounting the universal wheel (3) on the fixing rod (31).

5. A lattice column structure accurately positioned on a pile foundation according to claim 4, characterized in that: The end of the main angle steel (11) extending out of the terminal steel cage (2) is provided with a connecting angle steel (14), and the connecting angle steel (14) is partially arranged in the lattice column body (1), and the two side walls on the outside of the connecting angle steel (14) respectively abut against the two side walls on the inside of the main angle steel (11), so as to locate the relative position of the next lattice column body (1) and the current lattice column body (1).

6. A lattice column structure accurately positioned on a pile foundation according to claim 5, characterized in that: The connecting angle steel (14) is arranged obliquely away from the outer side wall of the lattice column body (1), and the inclined surface is arranged obliquely from the end away from the lattice column body (1) toward the direction close to the lattice column body (1).

7. The lattice column structure accurately positioned on a pile foundation according to claim 1, characterized in that: The main body angle steel (11) is fixedly provided with an anti-stuck steel bar (15) at the end of the terminal steel cage (2); one end of the anti-stuck steel bar (15) is arranged on the inner side wall of the main body angle steel (11), and the other end is arranged on the terminal steel cage (2); and the anti-stuck steel bars (15) are respectively fixedly provided on both inner side walls of the main body angle steel (11) to prevent the conduit used for injecting concrete slurry into the steel casing from being stuck in the lattice column body (1) when being lifted up.

8. A method for constructing a lattice column with accurate positioning and pile foundation casting to prevent conduit jamming as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: manufacturing the end reinforcement cage (2) and the lattice column body (1); Step 2: bury the steel casing and dig the pile hole; Step 3: Clean the pile hole; Step 4: Hanging the steel cage into the pile hole, and then hanging the end steel cage (2) and the lattice column body (1) into the pile hole at the same time; Step 5: Lower the guide tube and pour the pile foundation; Step 6: Pull out the steel casing; Step 7: Pile foundation testing.

9. A lattice column construction method for accurate positioning and pile foundation pouring to prevent conduit jamming according to claim 8, characterized in that: In step 5, the guide tube is first lowered, then the universal wheel (3) located at the opening of the pile hole is removed, and then the pile foundation is poured.

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