CN114875944A

CN114875944A - Open caisson supporting structure and construction method

Info

Publication number: CN114875944A
Application number: CN202210667882.1A
Authority: CN
Inventors: 朱宏亮; 方建生
Original assignee: Zhejiang Wanli Construction Engineering Co ltd
Current assignee: Zhejiang Wanli Construction Engineering Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-08-09
Anticipated expiration: 2042-06-14
Also published as: CN114875944B

Abstract

The utility model relates to an open caisson bearing structure, including the well body, set up in the sword foot of well body lower extreme, the internal side of well is equipped with the centre form, the outside is equipped with the external mold, the internal backing plate that is located sword foot below that is equipped with of well, be equipped with the butt on the inclined plane of sword foot on the backing plate, one side that the sword foot was kept away from to the backing plate is equipped with the support ring, the circumference lateral wall of support ring articulates there is a plurality ofly and the bracing piece of backing plate one-to-one, the one end and the backing plate that the support ring was kept away from to the bracing piece are connected, the internal drive support ring that is equipped with of well drives the bracing piece, the driving piece that the backing plate goes out under the sword foot. And through ground processing, support overlap joint, sword foot formwork, prefabricated open caisson, well body sword foot drawing of patterns, the excavation sinks, multisection well body is pour, back cover capping sinks well body construction into the soil layer, this application is through setting up support ring, bracing piece, backing plate, utilizes the driving piece to drive the support ring and slides for all bracing pieces and backing plate rotate in step, in order to rotate the sword foot in step with the inclined plane, thereby have the advantage that improves the efficiency of form removal to the sword foot.

Description

Open caisson supporting structure and construction method

Technical Field

The application relates to the technical field of building construction, in particular to an open caisson supporting structure and a construction method.

Background

At present, in the process of gradually spreading city construction to rural construction, engineering construction is increasingly perfect, and roads and bridges are mainly constructed. In order to support a road or a bridge, an open caisson is usually constructed under the road or the bridge for support.

The open caisson is a well tubular structure and is formed by pouring precast concrete, the bottom of the open caisson is provided with a cutting edge, and a plurality of skids are removed one by one when the well body is removed and the formwork is erected. When the well body sinks, the earth is dug in the well, the earth sinks to the designed elevation after overcoming the frictional resistance of the well wall by the self gravity, and then the earth passes through the concrete bottom sealing and is filled in the well hole, so that the earth becomes the foundation of a bridge abutment or other structures. The method is widely used on foundation pits of large-scale piers, sewage pump stations and large-scale equipment foundations.

With the above-described related art, the inventors consider that: after the well body is poured and formed, the formed well body needs to be demolded, and the edge legs are exposed through demolishing the skid blocks one by one, so that the demolding efficiency of the whole edge legs is low.

Disclosure of Invention

In order to improve the efficiency of stripping the cutting edge foot, the application aims to provide a sunk well supporting structure and a construction method.

On one hand, the open caisson supporting structure and the construction method provided by the application adopt the following technical scheme:

the utility model provides an open caisson bearing structure, includes the well body, sets up in the sword foot of well body lower extreme, the internal side of well is equipped with the centre form, the outside is equipped with the external mold, the internal backing plate that is located sword foot below that is equipped with of well, be equipped with the butt on the inclined plane of sword foot on the backing plate, one side that the sword foot was kept away from to the backing plate is equipped with the support ring, the circumference lateral wall of support ring articulates has a plurality ofly and the bracing piece of backing plate one-to-one, the bracing piece is kept away from the one end of support ring and the backing plate is connected, the internal drive that is equipped with of well the drive support ring drives bracing piece, backing plate and goes out under the sword foot.

By adopting the technical scheme, when the well body is disassembled, the internal mold and the external mold are disassembled, the driving piece is started, and the driving piece drives the support ring to move upwards. And then drive the upper end of bracing piece to shift up and draw close towards the support ring, pivoted bracing piece drives the backing plate and rotates towards the direction that is close to the support ring axis. So that the bevel is separated from the edge foot simultaneously in the process of rotating along with the backing plate. Therefore, the supporting ring, the supporting rods and the base plate are arranged, the driving piece is used for driving the supporting ring to slide, all the supporting rods and the base plate synchronously rotate, the inclined plane is synchronously rotated away from the cutting edge, and the efficiency of removing the die of the cutting edge is improved.

Optionally, the driving member includes a driving post in the supporting ring in threaded connection, and a plurality of driving rods disposed on the circumferential side wall of the driving post, and the driving rods are located below the supporting ring in threaded connection with the driving post.

By adopting the technical scheme, when the driving support ring moves upwards, the driving column is in threaded connection with the inside of the support ring at the moment, the driving rod is pushed, and the driving column is driven to rotate in the well body. The support ring is driven to move upwards through the rotating driving column, and then the support rod is driven to rotate towards the driving column synchronously, so that the base plate rotates away from the blade synchronously, and the base plate is conveniently separated from the blade synchronously.

Optionally, the lower end of the driving column is provided with a threaded drill, and the driving column drives the threaded drill to rotate into the soil layer and then drives the support ring to move upwards.

Through adopting above-mentioned technical scheme, when rotating the drive post and driving the support ring and remove, the actuating lever drives also to drive the screw thread drill bit and rotates in the soil horizon after the drive post rotates for the drive post slides towards opposite direction for the support ring, thereby is convenient for the support ring upwards slides for the drive post.

Optionally, a cushion block is embedded in a soil layer in the well body, the threaded drill bit is connected in the cushion block in a threaded mode, and the threaded drill bit is screwed into the cushion block to drive the support ring to move upwards.

Through adopting above-mentioned technical scheme, when rotating the drive post, drive screw thread drill bit and cushion internal rotation for move down in screw thread drill bit and the cushion, the support ring moves up for the drive post simultaneously. Meanwhile, after the driving column rotates reversely, the threaded drill bit is driven to move upwards in the cushion block, so that the driving column moves upwards relative to the supporting ring, the supporting ring is equivalent to the driving column to move downwards under threaded connection, and the stability of the driving column in moving in the vertical direction is improved.

Optionally, the driving column upper end cover is equipped with the fixed column, it has a plurality of joint posts to articulate on the circumference lateral wall of fixed column, set up the joint groove that supplies joint post card to go into on the well body inner wall.

Through adopting above-mentioned technical scheme, when supporting the well body, when going up the support ring from the drive column, overlap the fixed column on the drive column. Then rotate the joint post towards the direction of keeping away from the fixed column to make the joint post card go into the inner wall of the well body, remove the cushion simultaneously, make the screw drill rotate into the soil horizon. Then, excavation is started along one circle of the thread bit, the soil layer around the thread bit is reserved, and the soil layer at the position of the blade foot is excavated. Then the driving rod is rotated to drive the thread drill bit to rotate into the soil layer, and the driving column is driven to move downwards. And then the clamping column, the well body and the fixing column are driven to move downwards slowly along with the driving column, so that the well body is driven to integrally and synchronously move downwards under the rotation of the driving column after the soil layer below the blade foot is excavated. Therefore, by arranging the fixing column and the clamping column, the clamping column is clamped into the clamping groove, so that the well body moves downwards along with the driving column through the clamping column and the fixing column, the inclination of the blade foot in a soil layer is reduced, the deflection of the well body during sinking is reduced, and the stability of the well body during digging and sinking is improved.

Optionally, a rotating groove for the clamping column to rotate over is formed in the circumferential side wall of the fixing column, and the clamping column rotates over into the rotating groove and then rotates out of the clamping groove.

Through adopting above-mentioned technical scheme, after in going into the joint inslot with joint post card, with joint post from rotating the inslot adversion for the joint post is gone into in the joint inslot in the internal rotation back card of well. When the fixing column needs to be taken down from the driving column, the clamping column is rotated towards the direction close to the driving column, so that the clamping column is rotated out of the clamping groove and then rotated into the rear rotating groove. So that the rotation groove provides a rotation space for the clamping column, and the clamping column can rotate in the well body.

Optionally, the rotation directions of the clamping columns on the fixing column and the clamping grooves are different.

Through adopting above-mentioned technical scheme, when evenly sinking the sword foot, rotate the actuating lever and drive the drive post and rotate, through rotating the different joint post of direction, cause the influence to the fixed column when reducing the drive post and rotating to reduce the condition that the joint post rolled out from the joint inslot, thereby improve the stability of joint post card income joint inslot.

Optionally, the clamping columns are arranged in a staggered mode along the length direction of the fixing column.

Through adopting above-mentioned technical scheme, utilize crisscross joint post, reduce the interference that rotates the production between the joint post, and increase joint post pivoted space on same horizontal direction to the joint post of being convenient for can smoothly rotate separately on the fixed column.

In another aspect, the present application provides a method for constructing a caisson using the above-mentioned caisson support structure, comprising the steps of,

step S1: treating a foundation, measuring and drawing lines, and determining an excavation range;

step S2: the supports are lapped, the inner mold and the outer mold are supported, and a cushion block is embedded in a soil layer in the well body;

step S3: the bottom of the cutting edge is supported, the thread drill bit is connected with the cushion block in a thread mode, the driving column is connected with the support ring in a thread mode, and the support rod is rotated to enable the base plate to abut against the lower end of the inner die;

step S4: prefabricating the open caisson, placing the bound steel bars between the inner mold and the outer mold, and pouring concrete to form a well body and a cutting edge;

step S5: taking out the well body, rotating the driving column to drive the supporting rod to rotate, separating the base plate from the blade foot, moving the cushion block away, and aligning the threaded drill bit to the soil layer;

step S6: digging and sinking, sleeving the fixed column on the driving column, transferring the clamping column into the clamping groove, rotating the driving rod after digging to drive the driving column to move downwards, and further driving the well body to sink uniformly;

step S7: pouring a second section of the well body by utilizing the inner mold and the outer mold at the abutting upper part of the well body, continuously pouring upwards to form a multi-section well body, and continuously excavating according to the step S6;

step S8: and sealing the bottom and the top, cleaning the base and sealing the bottom after the well body sinks to the designed elevation, and pouring a reinforced concrete top cover on the top of the well body.

By adopting the technical scheme, when open caisson construction is carried out, the foundation is processed, the foundation is leveled, and the size of the well body area is measured, so that the excavation range is determined. And (4) supporting the outer mold and the inner mold, embedding a cushion block in the soil layer of the inner mold, and screwing the threaded drill bit into the cushion block, so that the driving column is in a vertical state. And then the supporting ring is connected to the driving column in a threaded manner, the supporting rod is unfolded to enable the base plate to extend into the lower ends of the inner die and the outer die, and the lower end of the inner die is higher than the lower end of the outer die at the moment, so that the inclined surface of the base plate forms the bottom wall of the blade. And then, the bound steel bars are placed between the inner mold and the outer mold, concrete is poured to form a well body, and the lower end of the well body forms an inclined blade foot under the support of the backing plate.

And the inner mold and the outer mold are detached until the well body is formed, and then the driving rod is rotated to drive the driving column to rotate so as to enable the supporting ring to move upwards and gather the supporting rod, and the base plate is synchronously separated from the blade foot. And then taking out the cushion block, screwing the thread drill bit into the soil layer, and beginning to dig soil along the thread drill bit so as to dig away the soil at the blade foot. Then the driving column is rotated, so that the threaded drill bit is screwed into the soil layer to drive the driving column to move downwards. The fixed column and the clamping column move downwards together with the driving column under the action of the well body, so that the blade foot moves downwards synchronously, and the inclination in the sinking process of the well body is reduced.

And after the upper end of the first well body sinks into the soil layer, the inner mold and the outer mold are supported, the second well body is poured, and after the second well body is formed, the soil continues to be excavated and sink, and the multiple well bodies are gradually poured. And after the last section of well body enters the ground, the designed elevation is reached, the bottom sealing is cleaned, water in the well body is drained, sand is fully paved, concrete is poured for sealing the bottom after the well body is leveled, and then a reinforced concrete top cover is poured on the top wall of the well body to realize top sealing.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the support ring, the support rods and the base plate, the support ring is driven by the driving piece to slide, so that all the support rods and the base plate synchronously rotate to synchronously rotate the inclined planes away from the cutting edge, and the efficiency of removing the mold of the cutting edge is improved;

2. through the arrangement of the driving column and the driving rod, the driving column is in threaded connection with the support ring, so that after the driving column drives the support ring to move up and down, the driving support rod is driven to synchronously rotate towards the driving column, the base plate is synchronously rotated away from the blade, and the base plate is conveniently and synchronously separated from the blade;

3. through arranging the fixing column and the clamping column and clamping the clamping column into the clamping groove, the well body moves downwards through the clamping column and the fixing column along with the driving column, the inclination of the blade leg in a soil layer is reduced, and then the deflection of the well body during sinking is reduced, so that the stability of the well body during digging and sinking is improved;

4. through setting up the different rotation directions with the joint post, and stagger the setting, increase joint post pivoted space in same horizontal direction to the joint post of being convenient for can smoothly rotate separately on the fixed column.

Drawings

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present application.

Fig. 2 is a schematic cross-sectional view for showing a driving column in embodiment 1 of the present application.

Fig. 3 is a schematic cross-sectional view illustrating a clamping groove according to an embodiment of the present application.

Fig. 4 is a construction flowchart of embodiment 2 of the present application.

Description of reference numerals: 1. a well body; 11. a blade foot; 12. an inner mold; 13. an outer mold; 14. cushion blocks; 15. a base plate; 16. a support bar; 17. a support ring; 18. a clamping groove; 2. a drive member; 21. a drive column; 211. a limiting block; 212. a convex column; 22. a drive rod; 23. a thread drill bit; 24. fixing the column; 241. a clamping column; 242. the groove is rotated.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment 1 of the application discloses open caisson bearing structure.

Referring to fig. 1 and 2, the well comprises a multi-section well body 1 formed by pouring and connecting up and down and a cutting edge 11 integrally formed at the lower end of the well body 1, wherein the inner wall of the cutting edge 11 is in a gradually expanding shape downwards along the vertical direction, an inner mold 12 is supported on the inner wall of the well body 1, an outer mold 13 is supported on the outer wall of the well body 1, and the well body 1 and the cutting edge 11 are formed by pouring reinforced concrete between the inner mold 12 and the outer mold 13.

Referring to fig. 2, a cushion block 14 embedded in the soil layer is arranged at the bottom in the well body 1, a threaded drill bit 23 is connected with the inner thread of the cushion block 14, and a driving column 21 is integrally formed on the threaded drill bit 23. The circumferential side wall of the driving column 21 is hinged with a plurality of driving rods 22, the hinge axis of the driving rods 22 extends along the horizontal direction, and the circumferential side wall of the driving column 21 is fixedly connected with a limiting block 211 abutted to the bottom wall of the driving rods 22 so as to limit the driving rods 22 to rotate downwards.

Referring to fig. 1 and 2, the bottom of the well body 1 is provided with a plurality of backing plates 15 positioned below the cutting edge 11, and the backing plates 15 are mutually spliced and abut against the inner wall of the well body 1 to form a ring shape. And the backing plate 15 is provided with an inclined surface abutting against the inner wall of the blade 11, the backing plate 15 abuts against the lower end of the inner die 12, and the side of the backing plate 15 opposite to the blade 11 is a smooth cambered surface, so that the backing plate 15 can be separated from the blade 11 after being rotated out from the lower part of the blade 11.

Referring to fig. 2, the upper end of the backing plate 15 is fixedly connected with a support rod 16, the support rod 16 extends upwards along the inclined direction of the inclined plane and gathers together towards the inside of the well body 1, one end of the support rod 16, which gathers together, is hinged with a support ring 17, the support rods 16 are hinged on the outer side wall of the support ring 17, and the hinge axis of the support rod 16 extends along the horizontal direction.

Referring to fig. 2, the support ring 17 is screwed to the upper end of the driving rod 21, and the driving rod 22 is located below the support bar 16, i.e. the driving rod 21 and the driving rod 22 are the driving member 2 for driving the support ring 17 to move up and down along the driving rod 21. So that the lower end of the support rod 16 is rotated in a direction approaching the driving stud 21 by the upward movement of the support ring 17, so that the shim plate 15 is rotated away from the blade foot 11.

Referring to fig. 2, the upper end of the driving column 21 is connected with a convex column 212, and the threaded drill 23 screwed into the spacer 14 can drive the supporting ring 17 to move upwards to be separated from the convex column 212, so that the supporting ring 17, the supporting rod 16 and the backing plate 15 can be taken out from the well body 1. The upper end of the driving column 21 is sleeved with a fixing column 24 sleeved on the convex column 212, and the convex column 212 rotates in the fixing column 24.

Referring to fig. 3, the circumferential side wall of the fixing column 24 is hinged with a plurality of clamping columns 241, and the hinge axes of the clamping columns 241 extend in the vertical direction. The inner wall of the well body 1 is provided with a clamping groove 18 for clamping the clamping column 241, and the directions of the clamping column 241 rotating into the clamping groove 18 on the fixing column 24 are different.

Referring to fig. 2 and 3, the latching columns 241 are disposed in a staggered manner in the length direction of the fixing column 24, that is, the rotation directions of the latching columns 241 corresponding to the length direction of the fixing column 24 are opposite. The fixing post 24 is provided with a rotating groove 242 for the rotation of the clamping post 241, and the clamping post 241 rotates out of the clamping groove 18 and then rotates into the rotating groove 242, so that the rotating space of the clamping post 241 is separated from the inner wall of the well body 1.

The implementation principle of the embodiment 1 of the application is as follows: when the cutting edge 11 is demoulded, the driving rod 22 is rotated to drive the driving column 21 to rotate, so that the thread bit 23 is screwed into the cushion block 14 to drive the supporting ring 17 to move upwards. So that the support ring 17 moves upwards to drive the support rod 16 to rotate together towards the driving column 21, so that the backing plate 15 is synchronously separated from the cutting edge 11 for demoulding. The drive rod 22 is then rotated further, causing the support ring 17 to move up and disengage the drive post 21, removing the support ring 17, support rod 16, and pad 15 from the well 1. The pad 14 is then removed to drive the auger bit 23 into the earth. The soil layer in the well body 1 is excavated along the blade 11, the soil layer around the screw drill 23 is reserved, and after the well body is excavated to a proper position, the driving rod 22 is pushed to drive the driving column 21 to rotate, so that the well body 1 drives the fixing column 24 to slide down along with the driving column 21 through the clamping column 241, the blade 11 is driven to sink uniformly in the process of screwing the screw drill 23 into the soil layer, and the inclination generated in the sinking process of the well body 1 is reduced.

The embodiment 2 of the application discloses a method for constructing an open caisson.

Referring to fig. 2 and 4, a caisson supporting structure is used, which includes the steps of treating a foundation to level the circumference, measuring a range in which a caisson is drawn, and filling sand around the drawn range to reinforce the circumference of the excavated range after the excavated range is determined.

Then, a bracket is built, and the inner die 12 and the outer die 13 are vertically fixed. The pad 14 is embedded in the earth and the threaded drill bit 23 is screwed into the pad 14. The support ring 17 is then screwed onto the upper end of the drive post 21 and the support bar 16 is spread apart so that the shim plate 15 is located at the lower end of the inner die 12 so that the inclined surface of the shim plate 15 forms the bottom wall of the blade foot 11.

And (3) prefabricating the open caisson, binding steel bars, placing the steel bars between the inner die 12 and the outer die 13, and then pouring concrete, so that the concrete is accumulated on the backing plate 15 to form the inclined edge leg 11 until the well body 1 is formed. Then, the driving rod 22 is rotated to drive the driving column 21 to rotate, so that the thread drill 23 is selected from the cushion block 14 to drive the driving column 21 to move upwards, the supporting ring 17 moves downwards, and the supporting rod 16 is driven to drive the backing plate 15 to rotate downwards, so that the contact position of the upper end of the backing plate 15 and the blade 11 is separated firstly. Then the screw bit 23 is screwed into the cushion block 14 to drive the driving column 21 to slide downwards, and the supporting ring 17 slides upwards to drive the backing plate 15 to be separated from the cutting edge 11 at the same time until the supporting ring 17 is separated from the upper end of the driving column 21.

Then the fixing column 24 is sleeved on the driving column 21, and the clamping column 241 is rotated out, so that the clamping column 241 is rotated into the clamping groove 18, and the gravity of the well body 1 can be transmitted to the fixing column 24 and the driving column 21 through the clamping column 241. So that after the earth around the cutting edge 11 is excavated, the driving rod 22 is rotated to rotate the driving post 21, thereby rotating the screw drill 23 into the earth. With the screwing in of the screw drill 23, the driving column 21 and the fixing column 24 are driven to sink, and further the well body 1 is driven to sink, so that the blade 11 sinks synchronously and uniformly.

And after the well body 1 sinks to the elevation position, the inner mold 12 and the outer mold 13 are supported at the upper end of the first well body 1, then the second well body 1 is poured, excavation is continued according to the previous step, so that a plurality of sections of the well body 1 are continuously poured upwards, and the well body 1 sinks one section by one section.

And finally, taking out the well body 1 together with the fixed column 24 of the driving column 21, detecting whether the well body 1 sinks to the elevation, and pumping out the accumulated water in the sunk well body 1. And after accumulated water is cleaned, cleaning soil layers at the bottom of the well body 1 orderly, paving broken stones to make a foundation, and then pouring concrete to seal the bottom. And filling the well body 1 after bottom sealing, and pouring a reinforced concrete top cover on the top of the well body 1.

The implementation principle of embodiment 2 of the present application is as follows: the driving rod 22 is used to drive the driving column 21 to rotate, so that the backing plate 15 can be simultaneously separated from the blade 11 and can also be screwed into the soil layer through the screw drill 23. Under the gravity oppression that the well body 1 acted on joint post 241, fixed column 24 for the other soil layer of sword foot 11 excavates the back, drives drive post 21 through rotating actuating lever 22 and rotates, makes sword foot 11 evenly slowly sink under the rotation of screw drill bit 23, with the condition of avoiding the slope of the well body 1, thereby improves the sunken stability of the well body 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A kind of open caisson bearing structure, characterized by: the improved well comprises a well body (1) and a cutting edge (11) arranged at the lower end of the well body (1), wherein an inner die (12) is arranged on the inner side of the well body (1), an outer die (13) is arranged on the outer side of the well body (1), a plurality of base plates (15) located below the cutting edge (11) are arranged in the well body (1), inclined planes which are abutted to the cutting edge (11) are arranged on the base plates (15), a support ring (17) is arranged on one side, away from the cutting edge (11), of each base plate (15), a plurality of support rods (16) which correspond to the base plates (15) in a one-to-one mode are hinged to the circumferential side wall of each support ring (17), one end, away from the support ring (17), of each base plate (16) is connected with the base plates (15), and a driving piece (2) which drives the support rings (17) and the base plates (15) to rotate out from the cutting edge (11) is arranged in the well body (1).

2. The open caisson support Structure of claim 1, wherein: the driving piece (2) comprises a driving column (21) in the supporting ring (17) in threaded connection and a plurality of driving rods (22) arranged on the circumferential side wall of the driving column (21), and the driving rods (22) are located below the supporting ring (17) and the driving column (21) in threaded connection.

3. The open caisson support Structure of claim 2, wherein: the lower end of the driving column (21) is provided with a threaded drill bit (23), and the driving column (21) drives the threaded drill bit (23) to rotate into the soil layer and then drives the support ring (17) to move upwards.

4. The open caisson support Structure of claim 3, wherein: the well body (1) is embedded with a cushion block (14) in a soil layer, the thread drill bit (23) is connected in the cushion block (14) in a threaded mode, and the thread drill bit (23) is screwed into the cushion block (14) to drive the support ring (17) to move upwards.

5. The caisson supporting structure of claim 2, wherein: the drive column (21) upper end cover is equipped with fixed column (24), it has a plurality of joint posts (241) to articulate on the circumference lateral wall of fixed column (24), offer joint groove (18) that supply joint post (241) card to go into on well body (1) inner wall.

6. The open caisson support Structure of claim 5, wherein: the circumferential side wall of the fixing column (24) is provided with a rotating groove (242) for the clamping column (241) to rotate in, and the clamping column (241) rotates in the rotating groove (242) and then rotates out of the clamping groove (18).

7. The open caisson support Structure of claim 5, wherein: the rotation directions of the clamping columns (241) rotating into the clamping grooves (18) on the fixing columns (24) are different.

8. The open caisson support Structure of claim 5, wherein: the clamping columns (241) are arranged in a staggered mode along the length direction of the fixing column (24).

9. A caisson construction method comprising a caisson support structure according to any one of claims 1 to 8, wherein: comprises the following steps of (a) carrying out,

step S1: treating a foundation, measuring and drawing a line, and determining an excavation range;

step S2: the supports are lapped, the inner mold (12) and the outer mold (13) are supported, and a cushion block (14) is embedded in a soil layer in the well body (1);

step S3: the bottom of the cutting edge (11) is supported, a threaded drill bit (23) is in threaded connection with the cushion block (14), a support ring (17) is in threaded connection with the driving column (21), and the support rod (16) is rotated to enable the cushion plate (15) to abut against the lower end of the inner die (12);

step S4: prefabricating the open caisson, placing the bound steel bars between the inner mold (12) and the outer mold (13), and pouring concrete to form a well body (1) and a blade leg (11);

step S5: taking out the well body (1), rotating the driving column (21) to drive the supporting rod (16) to rotate, separating the base plate (15) from the blade foot (11), removing the cushion block (14), and aligning the threaded drill bit (23) to a soil layer;

step S6: excavating and sinking, sleeving the fixed column (24) on the driving column (21), transferring the clamping column (241) into the clamping groove (18), rotating the driving rod (22) after excavating to drive the driving column (21) to move downwards, and further driving the well body (1) to sink uniformly;

step S7: pouring a second section of the well body (1) at the abutting upper part of the well body (1) by using the inner die (12) and the outer die (13), continuously pouring upwards to form a multi-section well body (1), and continuously excavating according to the step S6;

step S8: and bottom sealing and top sealing are carried out, the well body (1) is sunk to the designed elevation and then is subjected to foundation cleaning and bottom sealing, and a reinforced concrete top cover is poured on the top of the well body (1).