Construction method of lattice column by top-down method

Abstract

The application relates to a reverse construction method of a lattice column, which comprises the following steps: step 1: before pile hole forming, the site is leveled and an adjusting assembly is installed; step 2: a pile hole is punched by a piling device; step 3: a positioning column is placed into the pile hole by a hoisting device until the lower end of the positioning column abuts against the bottom of the pile hole; step 4: the positioning column is adjusted by the adjusting assembly to keep the vertical state, then concrete mortar is poured into the bottom of the pile hole, the positioning column can be fixed, and then the adjusting assembly is removed; step 5: positioning sleeves on the lattice column are sequentially sleeved on the positioning column, and the lattice column is placed into the pile hole, the lattice column can be positioned by the positioning sleeves, so that the perpendicularity of the lattice column is ensured. The application has the effect of ensuring the perpendicularity of the lattice column.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lattice column construction, in particular to a reverse construction method for lattice column construction. BACKGROUND

[0002] The reverse construction method is an unconventional construction method, which is generally used in special circumstances such as deep foundation, complex geology, high groundwater level, etc. First, a underground continuous wall is constructed along the periphery of the building, then a middle support pile and a lattice column are cast or punched, which serves as a support for bearing the self-weight of the upper structure and the construction load during the construction period before the bottom plate is sealed. Then, the soil is excavated to the bottom surface elevation of the first basement, and the beam and slab floor structure of the layer is completed, and then the soil is excavated and the underground structure of each layer is poured layer by layer downward, until the bottom plate is sealed. At the same time, since the floor structure of the ground floor has been completed, conditions are created for the construction of the upper structure, so the construction of the aboveground structure can be carried out layer by layer upward at the same time. The technical difficulty of this construction process lies in that when the lattice column is pre-buried, the perpendicularity of the lattice column is difficult to control, thus affecting the construction to a certain extent. SUMMARY

[0003] In order to ensure the perpendicularity of the lattice column, the present application provides a reverse construction method for lattice column construction.

[0004] The reverse construction method for lattice column construction provided by the present application adopts the following technical scheme:

[0005] The reverse construction method for lattice column construction provided by the present application comprises the following steps:

[0006] Step 1: site leveling, before the pile hole is formed, the damaged parts and the gaps of the site are repaired and reinforced, the position for installing the adjusting assembly is measured and laid out on the ground, a pit with a length, width and height of 500 mm is excavated, and then a concrete boss is formed by pouring concrete, the concrete surface is smoothed, and the adjusting assembly is installed after the concrete is solidified;

[0007] Step 2: pile hole (3) forming, the position of the pile hole (3) is laid out, then the pile hole (3) is punched at the pile position layout position by a piling equipment according to the construction requirements, wherein the impact drill bit is immediately taken out of the hole after the final hole, and the actual hole depth is detected, and most of the sediment at the bottom of the pile hole (3) is cleaned in time;

[0008] Step 3: installing the positioning column (1), the positioning column (1) is placed into the pile hole (3) by hoisting equipment until the lower end of the positioning column (1) abuts against the bottom of the pile hole (3);

[0009] Step 4: Adjust the verticality of the positioning column (1), adjust the positioning column through the adjusting assembly (2), so that the positioning column remains vertical, then pour concrete mortar into the bottom of the pile hole (3), and pour it to the elevation position. After the concrete mortar solidifies, the positioning column can be fixed, and then the adjusting assembly (2) is removed;

[0010] Step 5: Install the lattice column (4), the positioning sleeve (41) on the lattice column (4) is sequentially sleeved on the positioning column (1), and the lattice column (4) is placed into the pile hole (3). The positioning sleeve (41) can position the lattice column (4), so as to ensure the verticality of the lattice column (4).

[0011] Optionally, in step 3, the lower end of the positioning column is provided with a mounting seat, the lower end of the positioning column is ball-jointed to the mounting seat, and the adjusting device is arranged at the upper end.

[0012] By adopting the above technical scheme, the mounting seat is arranged below the positioning column, the mounting seat is placed below during installation of the positioning column, and then the positioning column and the mounting seat are placed into the pile hole by hoisting equipment until the mounting seat extends into the bottom of the pile hole. The positioning column is ball-jointed to the mounting seat, the positioning column can deflect around the joint point, so that the verticality of the positioning column can be adjusted by the adjusting assembly. After the verticality of the positioning column is adjusted, concrete is poured into the lower part of the positioning column and the mounting seat, so as to fix the positioning column and the mounting seat.

[0013] Optionally, in step 4, the adjusting assembly includes a connecting sleeve, adjustment frames and driving members. The connecting sleeve is sleeved on the upper end of the positioning column, the adjustment frames are arranged in a plurality of numbers, the adjustment frames are arranged in a circumferential array around the axis of the pile hole, the adjustment frames are connected to the connecting sleeve, and the driving members are arranged in a plurality of numbers. The driving members correspond to the adjustment frames and drive the adjustment frames to swing up and down. The upper surfaces of the adjustment frames are provided with levels.

[0014] By adopting the above technical scheme, when the verticality of the positioning column needs to be adjusted, the connecting sleeve is first sleeved on the positioning column, and then the adjustment frames are connected to the connecting sleeve. The adjustment frames are driven to swing by the driving members. When the levels on the adjustment frames all tend to be horizontal, the positioning column tends to be vertical. Then the positioning column is fixed by concrete.

[0015] Optionally, the upper end of the positioning column is provided with a mounting boss, and the lower surface of the connecting sleeve abuts against the upper surface of the mounting boss.

[0016] By adopting the above technical scheme, when the verticality of the positioning column needs to be adjusted, the connecting sleeve is sleeved on the positioning column. The mounting boss can limit the connecting sleeve, so that the installation of the connecting sleeve is convenient and fast.

[0017] Optionally, the adjusting frame is a rectangular frame, the side wall of the adjusting frame is connected to the connecting sleeve, the driving member is a hydraulic cylinder, and the axis of the hydraulic cylinder is vertically arranged, and the hydraulic cylinder piston rod abuts against the lower surface of the adjusting frame.

[0018] By using the above technical scheme, when the verticality of the positioning column needs to be adjusted, the movement of the hydraulic piston rod drives the swing of the adjusting frame, and the level meter is arranged on the adjusting frame; when the level meters on the three adjusting frames all show level, the connecting sleeve is horizontally arranged, that is, the axis of the positioning column is vertically arranged, and then the positioning column only needs to be fixed.

[0019] Optionally, the positioning column has a first cavity inside, a stirring rod is arranged in the positioning column, the positioning column is provided with a plurality of groups of first through grooves, the plurality of groups of first through grooves are distributed along the axis direction of the positioning column, each group of the first through grooves includes a plurality of first through grooves, the plurality of first through grooves are distributed around the axis direction of the positioning column, and the first through grooves are communicated with the first cavity.

[0020] By using the above technical scheme, the concrete inside the lattice column can be stirred by the stirring rod, air in the concrete can be discharged, the concrete becomes more compact, and the compactness of the concrete is improved. In this way, the pores and defects in the concrete can be reduced, and the strength and durability of the concrete are improved. After stirring, the stirring rod can be taken out, so that the stirring rod can be reused.

[0021] Optionally, a second cavity is formed in the stirring rod, a plurality of groups of second through grooves are formed in the outer wall of the stirring rod, the plurality of groups of second through grooves are distributed along the axis direction of the positioning column, the second through grooves are communicated with the second cavity, a plurality of groups of stirring members are arranged on the inner wall of the second cavity, the plurality of groups of stirring members are distributed along the axis direction of the stirring rod, each group of the stirring members includes a plurality of stirring members, and the plurality of stirring members are distributed in a circumferential array around the axis direction of the stirring rod.

[0022] By using the above technical scheme, the stirring members are arranged in the stirring rod, and the second through grooves are respectively communicated with the first cavity and the second cavity. Therefore, the contact area of the stirring rod and the concrete mortar can be increased by arranging the stirring members, so that the stirring effect of the stirring rod on the concrete mortar can be improved.

[0023] Optionally, the positioning column is provided with a plurality of groups of connecting rods, the plurality of groups of connecting rods are distributed along the axis direction of the positioning column, each group of the connecting rods includes a plurality of connecting rods, the plurality of connecting rods are distributed around the axis direction of the positioning column, and the positioning sleeve is provided with a relief gap for avoiding the connecting rods.

[0024] By adopting the technical scheme, when the lattice column is positioned and installed on the positioning column, the connecting rod can be connected to the lattice column, thereby further connecting the lattice column and the positioning column, improving the connection stability of the lattice column and the positioning column, and after the lattice column is poured with concrete, the connecting rod is located in the concrete, and when the concrete solidifies, the connecting rod can improve the structural strength of the lattice column and the concrete.

[0025] Optionally, the connecting rod is connected to the limiting rod in the axial direction, the lattice column is provided with a limiting hole for clamping the limiting rod, one end of the limiting rod extends into the first cavity, and the limiting rod is provided with a first guide surface at one end in the first cavity.

[0026] By adopting the technical scheme, the limiting rod can be clamped in the limiting hole by sliding the limiting rod, thereby further fixing the lattice column and the positioning column, and after the lattice column is poured with concrete, the strength of the lattice column can be further improved; when the stirring rod is inserted into the first cavity from top to bottom, after the second guide surface abuts against the first guide surface, the limiting rod can be forced to slide away from the positioning column by the first guide surface, so that the limiting rod is clamped in the limiting hole to connect the positioning column and the lattice column.

[0027] Optionally, the lower end of the stirring rod is provided with a rotating seat coaxially connected to the lower end of the stirring rod, and the second guide surface is arranged at the lower part of the rotating seat.

[0028] By adopting the technical scheme, the rotating seat is coaxially connected to the stirring rod, and when the stirring rod is inserted into the first cavity, the lower end surface of the rotating seat abuts against the bottom wall of the first cavity, thereby improving the rotation stability of the stirring rod during stirring.

[0029] In summary, the present application has the following advantages:

[0030] 1. When the verticality of the positioning column needs to be adjusted, the movement of the hydraulic piston rod drives the swinging of the adjusting frame, and the adjusting frame is provided with a level, when the levels on the three adjusting frames all show level, the connecting sleeve is horizontally arranged, that is, the axis of the positioning column is vertically arranged, and then the positioning column only needs to be fixed;

[0031] 2. The limiting rod can be clamped in the limiting hole by sliding the limiting rod, thereby further fixing the lattice column and the positioning column, and after the lattice column is poured with concrete, the strength of the lattice column can be further improved; when the stirring rod is inserted into the first cavity from top to bottom, after the second guide surface abuts against the first guide surface, the limiting rod can be forced to slide away from the positioning column by the first guide surface, so that the limiting rod is clamped in the limiting hole to connect the positioning column and the lattice column. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a structural schematic diagram of the embodiment;

[0033] Figure 2 is a schematic diagram of the installation of the positioning column and the lattice column in the embodiment;

[0034] Figure 3 is a structural schematic diagram of the lattice column in the embodiment;

[0035] Figure 4 is a structural schematic diagram of the positioning column in the embodiment;

[0036] Figure 5 is a structural schematic diagram of the stirring rod in the embodiment.

[0037] In the drawings, 1, positioning column; 11, mounting seat; 12, first through slot; 13, connecting rod; 14, limiting rod; 141, first guide surface; 15, first cavity; 16, mounting boss; 2, adjusting assembly; 21, connecting sleeve; 22, adjusting frame; 23, hydraulic cylinder; 24, level; 3, pile hole; 4, lattice column; 41, positioning sleeve; 42, fixing rod; 43, avoiding notch; 44, limiting hole; 5, stirring rod; 51, second through slot; 52, stirring piece; 53, rotating seat; 531, second guide surface; 54, second cavity. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying Figures 1-5 The application is further described in detail.

[0039] The embodiment of the application discloses a reverse construction method of a lattice column, which refers to Figure 1 , Figure 2 and Figure 3 The reverse construction method of the lattice column comprises the following steps:

[0040] Step 1: site leveling, before forming the pile hole 3, the damaged parts and the gaps of the site are repaired and reinforced, the position for installing the adjusting assembly 2 is measured and laid out on the ground, a pit hole with a length, width and height of 500 mm is excavated, and then the pit hole is formed by pouring concrete to form a concrete boss, the concrete surface is smoothed, and the adjusting assembly 2 is installed after the concrete is solidified;

[0041] Step 2: pile hole 3 forming, the position of the pile hole 3 is laid out, then the pile hole 3 is punched by a piling equipment according to the construction requirements at the pile laying position, wherein, the impact drill bit is immediately taken out of the hole after the final hole, the actual hole depth is detected, and most of the sediment at the bottom of the pile hole 3 is cleaned in time;

[0042] Step 3: install the positioning column 1, place the positioning column 1 into the pile hole 3 through hoisting equipment until the lower end of the positioning column 1 abuts against the bottom of the pile hole 3;

[0043] Step 4: adjust the perpendicularity of the positioning column 1, adjust the positioning pile through the adjusting assembly 2 so that the positioning pile remains in a vertical state, then pour concrete mortar into the bottom of the pile hole 3 to the elevation position, and after the concrete mortar solidifies, the positioning pile can be fixed, and then the adjusting assembly 2 is removed;

[0044] Step 5: install the lattice column 4, sequentially set the positioning sleeves 41 on the lattice column 4 on the positioning column 1, and place the lattice column 4 into the pile hole 3, the positioning sleeves 41 can position the lattice column 4, thereby ensuring the perpendicularity of the lattice column 4.

[0045] Referring to Figure 1 and Figure 2 , the positioning column 1 in step 3 is provided with a mounting seat 11, the mounting seat 11 is located at the lower end of the positioning column 1, the lower end of the positioning column 1 is ball-hinged to the mounting seat 11, after the pile hole 3 is punched, the positioning column 1 and the mounting seat 11 are placed into the pile hole 3 through hoisting equipment, the mounting seat 11 is located at the bottom of the pile hole 3, then the perpendicularity of the positioning column 1 is adjusted through the adjusting assembly 2, after the perpendicularity of the positioning column 1 is adjusted, concrete mortar is poured into the pile hole 3 to the elevation position, and after the concrete mortar solidifies, the lower end of the positioning column 1 and the mounting seat 11 are sealed. First, the mounting seat 11 is fixed in the pile hole 3 after the concrete solidifies, and the height of the concrete mortar is higher than the hinge point of the positioning column 1 and the mounting seat 11, so that the positioning column 1 and the mounting seat 11 can be fixed after the concrete mortar solidifies, so that the positioning column 1 does not rotate relative to the mounting seat 11.

[0046] Referring to Figure 1 , the adjusting assembly 2 includes a connecting sleeve 21, an adjusting frame 22, and a driving member, the upper end of the positioning column 1 is provided with a mounting boss 16, the connecting sleeve 21 is circumferentially sleeved on the positioning column 1 and abuts against the upper surface of the mounting boss 16, and the mounting boss 16 needs to be cut off after the perpendicularity of the positioning column 1 is adjusted. The adjusting frame 22 is provided with a plurality of adjusting frames 22, the plurality of adjusting frames 22 are distributed in a circumferential array around the axis direction of the connecting sleeve 21, the number of the adjusting frames 22 in the embodiment is three, the adjusting frame 22 is rectangularly arranged, the length direction of the adjusting frame 22 is horizontally arranged, the width direction of the adjusting frame 22 is vertically arranged, the side surface of the adjusting frame 22 is fixedly connected to the side surface of the connecting sleeve 21, and the upper surface of the adjusting frame 22 is fixedly connected with a level 24.

[0047] Referring to Figure 1The driving member is a hydraulic cylinder 23, a base is arranged on the side of the cylinder body of the hydraulic cylinder 23 away from the piston rod, and the base is installed on the platform by the anchor bolt when the site is leveled and the concrete platform is poured on the bottom surface, so that the installation of the hydraulic cylinder 23 is realized. The piston rod of the hydraulic cylinder 23 abuts against the lower surface of the adjusting frame 22, and the adjusting frame 22 is driven to swing by the hydraulic cylinder 23, so that the perpendicularity of the positioning column 1 can be adjusted. When it is necessary to adjust the perpendicularity of the positioning column 1, the swing of the adjusting frame 22 is driven by the movement of the hydraulic piston rod, and the level meter 24 is arranged on the adjusting frame 22. When the level meters 24 on the three adjusting frames 22 all show the level, that is, the connecting sleeve 21 is arranged horizontally, that is, the axis of the positioning column 1 is arranged vertically, and then the positioning column 1 is fixed by the concrete.

[0048] With reference to Figure 2 and Figure 3 A plurality of positioning sleeves 41 are arranged in the lattice column 4, the plurality of positioning sleeves 41 are distributed along the length direction of the lattice column 4, and the positioning sleeve 41 is located in the interior of the lattice column 4. After the installation of the positioning column 1 is completed, the connecting sleeve 21 and the adjusting frame 22 can be disassembled, and then the positioning sleeve 41 is sleeved on the positioning column 1 and then is lowered into the pile hole 3. The positioning sleeve 41 is sleeved on the positioning column 1, so that the perpendicularity of the lattice column 4 after being lowered into the pile hole 3 can be ensured.

[0049] With reference to Figure 3 The outer peripheral wall of the positioning sleeve 41 is provided with a plurality of fixing rods 42. In the embodiment, the number of the fixing rods 42 is four, the four fixing rods 42 are distributed in a circumferential array around the axis direction of the positioning sleeve 41, the axis direction of the fixing rod 42 is perpendicular to the length direction of the lattice column 4, one end of the fixing rod 42 is fixedly connected to the side of the positioning sleeve 41, and the other end of the fixing rod 42 is fixedly connected to the inner wall of the lattice column 4. The installation of the positioning sleeve 41 is realized by the fixing rod 42.

[0050] With reference to Figure 4 and Figure 5 The outer peripheral wall of the positioning column 1 is provided with a plurality of groups of connecting rods 13. The plurality of groups of connecting rods 13 are distributed along the axis direction of the positioning column 1, each group of connecting rods 13 includes a plurality of connecting rods 13, and each group of connecting rods 13 includes two connecting rods 13 in the embodiment. The end surface of the connecting rod 13 is coaxially provided with a first sliding slot, the connecting rod 13 is provided with a limiting rod 14, the limiting rod 14 is slidably connected to the first sliding slot in the axis direction, the lattice column 4 is provided with a limiting hole 44 for clamping the limiting rod 14, the limiting rod 14 is clamped in the limiting hole 44 by sliding the limiting rod 14, so that the lattice column 4 and the positioning column 1 are further fixed. After the lattice column 4 is poured with concrete, the strength of the lattice column 4 can be further improved.

[0051] Referring to Figure 4 and Figure 5 , located so that the positioning sleeve 41 can be set on the positioning column 1, the positioning sleeve 41 is provided with two avoiding notches 43, and the two avoiding notches 43 are respectively matched with the four connecting rods 13 one by one. After adjusting the positioning column 1, the positioning sleeve 41 is set on the positioning column 1, and at this time the avoiding notches 43 can avoid the connecting rods 13, so that the positioning sleeve 41 can slide along the positioning column 1. The connecting rod 13 is arranged in a staggered manner with the fixed rod 42, and the end of the fixed rod 42 away from the positioning sleeve 41 is fixedly connected with the angle iron of the lattice column 4.

[0052] Referring to Figure 4 and Figure 5 , the inside of the positioning column 1 has a first cavity 15, and the first sliding groove is communicated to the first cavity 15 at the end away from the limiting hole 44. One end of the limiting rod 14 extends to the first cavity 15. The positioning column 1 is provided with a stirring rod 5, and the end of the limiting rod 14 close to the first cavity 15 is provided with a first guide surface 141, which is arranged in an inclined manner from top to bottom towards the direction close to the first cavity 15. The lower end of the stirring rod 5 is provided with a second guide surface 531, and when the stirring rod 5 is inserted into the first cavity 15 from top to bottom, the second guide surface 531 abuts against the first guide surface 141, which can force the limiting rod 14 to slide away from the positioning column 1, so that the limiting rod 14 is clamped in the limiting cavity to connect the positioning column 1 and the lattice column 4.

[0053] Referring to Figure 4 and Figure 5 , the positioning column 1 is provided with a plurality of groups of first through grooves 12, and the plurality of groups of first through grooves 12 are distributed along the axis direction of the positioning column 1. Each group of first through grooves 12 includes a plurality of first through grooves 12, and the plurality of first through grooves 12 are distributed around the axis direction of the positioning column 1. The first through groove 12 is communicated with the first cavity 15. In the construction process, it is necessary to pour concrete for the construction column. After pouring the concrete, because the first through groove 12 is provided on the positioning column 1 and the first through groove 12 is communicated with the first cavity 15, the concrete inside the lattice column 4 can be stirred by the stirring rod 5, the air in the concrete can be discharged, the concrete becomes more compact, and the compactness of the concrete is improved. In this way, the porosity and defects in the concrete can be reduced, and the strength and durability of the concrete can be improved. After stirring, the stirring rod 5 can be taken out to facilitate the reuse of the stirring rod 5.

[0054] Referring to Figure 4 and Figure 5The second cavity 54 is formed in the stirring rod 5, a plurality of second through grooves 51 are formed in the outer wall of the stirring rod 5, the second through grooves 51 are distributed along the axis direction of the positioning column 1, each group of the second through grooves 51 comprises a plurality of second through grooves 51, the plurality of second through grooves 51 are distributed around the axis direction of the positioning column 1, and the second through grooves 51 are communicated with the second cavity 54. The inner wall of the second cavity 54 is fixedly connected with a plurality of groups of stirring pieces 52, the stirring pieces 52 are distributed along the axis direction of the stirring rod 5, each group of the stirring pieces 52 comprises a plurality of stirring pieces 52, and the plurality of stirring pieces 52 are distributed in a circumferential array around the axis direction of the stirring rod 5. The stirring pieces 52 are arranged in the stirring rod 5, so that the stirring effect of the stirring rod 5 can be improved.

[0055] With reference to Figure 4 and Figure 5 The lower part of the stirring rod 5 is provided with a rotating seat 53, the rotating seat 53 is coaxially and rotationally connected to the stirring rod 5, the lower end surface of the rotating seat 53 abuts against the bottom wall of the first cavity 15 after the stirring rod 5 is inserted into the first cavity 15, so that the rotating stability of the stirring rod 5 during stirring can be improved, and the second guide surface 531 is arranged on the lower end of the rotating seat 53.

[0056] The above are preferred embodiments of the present application, and are not used to limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method of constructing a lattice column by top-down construction, characterized by It comprises the following steps: Step 1: site leveling, before the pile hole (3) is formed, the damaged parts and the ditch defects are repaired and reinforced, the position for installing the adjusting assembly (2) is measured and laid out on the ground, a pit with a length, width and height of 500mm is excavated, and then a concrete platform is formed by pouring concrete, the concrete surface is smoothed, and the adjusting assembly (2) is installed after the concrete is solidified; Step 2: pile hole (3) forming, the position of the pile hole (3) is laid out, and then the pile hole (3) is punched at the pile laying position according to the construction requirements by using a piling equipment, wherein the impact drill bit is immediately taken out of the hole after the final hole is punched, the actual hole depth is detected, and most of the sediment at the bottom of the pile hole (3) is cleaned in time; Step 3: installing the positioning column (1), the positioning column (1) is placed into the pile hole (3) by using hoisting equipment until the lower end of the positioning column (1) abuts against the bottom of the pile hole (3); Step 4: adjusting the perpendicularity of the positioning column (1), the positioning column is adjusted by using the adjusting assembly (2) to keep the positioning column in a vertical state, then the concrete mortar is poured into the bottom of the pile hole (3) and poured to the elevation position, after the concrete mortar is solidified, the positioning column can be fixed, and then the adjusting assembly (2) is removed; Step 5: installing the lattice column (4), the positioning sleeve (41) on the lattice column (4) is sequentially sleeved on the positioning column (1), and the lattice column (4) is placed into the pile hole (3), the lattice column (4) can be positioned by using the positioning sleeve (41), so as to ensure the perpendicularity of the lattice column (4); In step 3, the lower end of the positioning column (1) is provided with a mounting seat (11), the lower end of the positioning column (1) is spherically hinged to the mounting seat (11), the adjusting device is arranged at the upper end, the lattice column (4) is provided with a positioning sleeve (41), and the positioning sleeve (41) is slidably sleeved on the positioning column (1); The inside of the positioning column (1) has a first cavity (15), the positioning column (1) is provided with a stirring rod (5), the positioning column (1) is provided with a plurality of groups of first through grooves (12), a plurality of groups of the first through grooves (12) are distributed along the axis direction of the positioning column (1), each group of the first through grooves (12) comprises a plurality of first through grooves (12), a plurality of the first through grooves (12) are distributed around the axis direction of the positioning column (1), and the first through grooves (12) are communicated with the first cavity (15); The stirring rod (5) is provided with a second cavity (54) inside, a plurality of second through grooves (51) are penetratingly formed on the outer side wall of the stirring rod (5), a plurality of groups of the second through grooves (51) are distributed along the axis direction of the positioning column (1), the second through grooves (51) are communicated with the second cavity (54), the inner wall of the second cavity (54) is provided with a plurality of groups of stirring pieces (52), the plurality of groups of stirring pieces (52) are distributed along the axis direction of the stirring rod (5), each group of the stirring pieces (52) comprises a plurality of stirring pieces (52), and a plurality of stirring pieces (52) are distributed in a circumferential array around the axis direction of the stirring rod (5).

2. The top-down method lattice column construction method according to claim 1, wherein: In step 4, the adjusting assembly (2) comprises a connecting sleeve (21), adjusting frames (22) and driving members, the connecting sleeve (21) is sleeved on the upper end of the positioning column (1), the adjusting frames (22) are provided in plurality, the adjusting frames (22) are distributed in a circular array around the axis of the pile hole (3), the adjusting frames (22) are connected to the connecting sleeve (21), the driving members are provided in plurality, the driving members correspond to the adjusting frames (22) respectively and drive the adjusting frames (22) to swing up and down, and the upper surface of the adjusting frame (22) is provided with a level (24).

3. The top-down method lattice column construction method according to claim 2, wherein: The upper end of the positioning column (1) is provided with a mounting boss (16), and the lower surface of the connecting sleeve (21) abuts against the upper surface of the mounting boss (16).

4. The top-down method lattice column construction method according to claim 2, wherein: The adjusting frame (22) is a rectangular frame, the side wall of the adjusting frame (22) is connected to the connecting sleeve (21), the driving member is a hydraulic cylinder (23), the axis of the hydraulic cylinder (23) is vertically arranged, and the hydraulic cylinder (23) piston rod abuts against the lower surface of the adjusting frame (22).

5. The top-down method lattice column construction method according to claim 1, wherein: The positioning column (1) is provided with a plurality of groups of connecting rods (13), the connecting rods (13) are distributed along the axial direction of the positioning column (1), each group of the connecting rods (13) comprises a plurality of connecting rods (13), the connecting rods (13) are distributed around the axial direction of the positioning column (1), and the positioning sleeve (41) is provided with a avoiding gap (43) for avoiding the connecting rod (13).

6. The top-down method lattice column construction method according to claim 5, wherein: The connecting rod (13) is connected to the limiting rod (14) in the axial direction in a sliding mode, the latticed column (4) is provided with a limiting hole (44) for clamping the limiting rod (14), one end of the limiting rod (14) extends into the first cavity (15), the limiting rod (14) is provided with a first guide surface (141) at one end in the first cavity (15), and the lower end of the stirring rod (5) is provided with a second guide surface (531).

7. The top-down method lattice column construction method according to claim 6, wherein: The lower end of the stirring rod (5) is provided with a rotating seat (53), the rotating seat (53) is coaxially connected to the lower end of the stirring rod (5) in a rotating mode, and the second guide surface (531) is arranged on the lower part of the rotating seat (53).

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