A method for excavating caissons and a vertical conveyor belt-type excavation and soil removal device

Abstract

This invention discloses a caisson excavation method and a vertical conveyor belt-type excavation and soil removal device. The method includes placing the device on top of the caisson, with an outer support wall attached to the outer wall of the caisson and an inner support wall attached to the inner wall of the caisson. A bottom translation component contacts the outer wall of the caisson. A motor is started to drive the main shaft to rotate, transmitting torque to the soil removal rollers inside the soil removal belt via a power belt. The two soil removal rollers at the front and rear of the soil removal belt are linked together. The soil removal belt transmits torque to the main digging roller of the digging belt via the digging belt. Through linkage and cooperation with the auxiliary digging roller, the digging belt rotates. The eccentric roller in the middle is driven to rotate by the digging belt, and the height of the digging belt is changed through linkage. Simultaneously, the bottom of the motor meshes with the translation component, enabling the entire device to move around the outer surface of the caisson. The beneficial effects of this invention are: it moves along the circumference of the caisson during excavation, resulting in more uniform soil removal and improved excavation efficiency.

Description

Technical Field

[0001] This invention relates to the field of caisson settlement technology, and in particular to a caisson excavation method and a vertical conveyor belt excavation and soil removal device. Background Technology

[0002] Existing caisson installations mainly include traditional caissons, the newly developed mechanically pressurized caissons, and vertical shield tunnels. Traditional caissons require dewatering and dry excavation followed by prefabrication of tunnel segments on the ground, resulting in low construction efficiency and high construction risks. Vertical shield tunneling technology is under development, and mechanically pressurized caissons have already begun to be used. Their common feature is the use of assembled prefabricated tunnel segments, leading to high construction efficiency. However, vertical shield tunnels require a central cutterhead, and pressurized caissons use a suction chuck for excavation, combining excavation and prefabrication, which is inefficient. Therefore, a caisson excavation method and a vertical conveyor belt-type excavation and soil removal device are needed to excavate the soil layers. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or existing caisson excavation methods and vertical conveyor belt excavation and disposal devices, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is to provide a method for excavating caissons and a vertical conveyor belt excavation and soil removal device.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a caisson excavation method, comprising: placing a device on top of the caisson, with the outer support wall attached to the outer wall of the caisson, the inner support wall attached to the inner wall of the caisson, the bottom translation component in contact with the outer wall of the caisson, starting a motor to drive the main shaft to rotate, transmitting torque to the soil-discharging roller inside the soil-discharging belt via a power belt, the two soil-discharging rollers at the front and rear of the soil-discharging belt being linked by the soil-discharging belt, the soil-discharging belt transmitting torque to the main digging roller of the digging belt via the digging belt, driving the digging belt to rotate through linkage and cooperation with the secondary digging roller, and the eccentric roller in the middle being driven to rotate by the digging belt, and changing the height of the digging belt through linkage, while the motor meshes with the bottom translation component, enabling the entire device to move around the outer surface of the caisson.

[0007] As a preferred embodiment of the vertical conveyor belt type excavation and soil disposal device of the present invention, it includes:

[0008] The excavation and soil removal unit includes a drive motor, a soil removal belt, and an excavation belt. The drive motor is located on the side of the soil removal belt, and the soil removal belt and the soil removal belt are connected by a belt drive. The support unit includes an outer support wall, an inner support wall, and a bottom translation component. The outer support wall and the inner support wall are fixedly connected, and the bottom translation component is located at the end of the outer support wall.

[0009] In a preferred embodiment of the vertical conveyor belt excavation and soil disposal device of the present invention, the drive motor includes a main shaft disposed at its end, a first drive gear disposed in the middle of the main shaft, and a second drive gear disposed at the end of the main shaft.

[0010] As a preferred embodiment of the vertical conveyor belt excavation and soil removal device of the present invention, the soil removal belt includes a first driven pulley disposed at its end, the first driven pulley includes a first transmission shaft fixedly connected thereto, and a soil removal roller is fixedly connected to the middle of the first transmission shaft.

[0011] In a preferred embodiment of the vertical conveyor belt excavation and soil removal device of the present invention, a second driven pulley is provided at the other end of the first drive shaft, the second driven pulley includes a soil removal belt that cooperates with it, a third driven pulley is provided on the other side of the soil removal belt, the third driven pulley includes a second drive shaft that is fixedly connected to it, a fourth driven pulley is also provided on the side of the third driven pulley, a fifth driven pulley is provided on the other side of the fourth driven pulley, and an excavation belt is provided between the two.

[0012] As a preferred embodiment of the vertical conveyor belt excavation and soil disposal device of the present invention, the excavation belt includes an excavation main roller disposed on its side, a third drive shaft disposed on the inner side of the excavation main roller, and the excavation belt includes an excavation auxiliary roller disposed at its other end, the excavation auxiliary roller including a fixed shaft disposed on its inner side.

[0013] As a preferred embodiment of the vertical conveyor belt excavation and soil disposal device of the present invention, the outer support wall includes a linkage bracket disposed on its side, the linkage bracket includes a linkage shaft disposed at its bottom, the linkage shaft is provided with a linkage gear on one side of the drive motor, a linkage pulley on the other side, and a power belt that is linked with the linkage pulley.

[0014] As a preferred embodiment of the vertical conveyor belt excavation and dumping device of the present invention, wherein: the linkage gear meshes with the first drive gear, the tooth groove of the first drive gear is formed on the circumferential surface of the gear, and the outer support wall further includes a support component for supporting the dumping belt, the support component including a first support column disposed on one side of the motor and a second support column disposed on one side of the excavation belt.

[0015] As a preferred embodiment of the vertical conveyor belt excavation and soil disposal device of the present invention, the inner support wall includes a movable block disposed at its bottom and a connecting column that movably cooperates with the movable block. The movable block includes an insert block disposed at its end and a movable support block disposed on its side. The connecting column includes a connecting block disposed on its side, a fixing block disposed on its other side, and a bonding plate disposed on the upper side of the connecting column.

[0016] As a preferred embodiment of the vertical conveyor belt excavation and soil disposal device of the present invention, the bottom translation component includes a mating shaft disposed on its side and a connecting plate fixed to the outer support wall. The mating shaft includes a translation gear disposed in its middle and a translation wheel disposed at its end.

[0017] The beneficial effects of this invention are as follows: In use, the device is placed on top of the caisson, with the outer support wall fitting against the outer wall of the caisson, the inner support wall fitting against the inner wall of the caisson, and the bottom translation component contacting the outer wall of the caisson. The motor is started to drive the main shaft to rotate, and the torque is transmitted to the soil-discharging roller inside the soil-discharging belt through the power belt. The two soil-discharging rollers at the front and rear of the soil-discharging belt are linked through the soil-discharging belt. The soil-discharging belt transmits the torque to the main digging roller of the digging belt through the digging belt. Through linkage and cooperation with the secondary digging roller, the digging belt is driven to rotate, and the eccentric roller in the middle is driven to rotate through the digging belt. The height of the digging belt is changed through linkage. At the same time, the bottom of the motor meshes with the bottom translation component, so that the entire device can move around the outer surface of the caisson. Through the cooperation of the eccentric roller, the height of the bottom of the digging belt can be changed at any time, realizing the up and down movement of the digging belt, thus improving the digging and soil-discharging efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 This is a perspective view of the vertical conveyor belt excavation and soil disposal device in the embodiment.

[0020] Figure 2 This is a front view structural diagram of the vertical conveyor belt excavation and soil disposal device in the embodiment.

[0021] Figure 3 This is a top view of the vertical conveyor belt excavation and soil removal device in the embodiment.

[0022] Figure 4 This is a side view of the vertical conveyor belt excavation and dumping device in the embodiment.

[0023] Figure 5 This is a rear-view oblique structural diagram of the vertical conveyor belt excavation and soil disposal device in the embodiment.

[0024] Figure 6 This is an enlarged view of point A of the vertical conveyor belt excavation and soil disposal device in the embodiment.

[0025] Figure 7 This is an enlarged view of section B of the vertical conveyor belt excavation and soil removal device in the embodiment. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention. This embodiment provides a caisson excavation method, including a soil excavation and disposal unit 100 and a support unit 200. The support unit 200 is disposed on the side of the soil excavation and disposal unit 100. The soil excavation and disposal unit 100 and the support unit 200 can perform their respective soil excavation, disposal and support actions, and excavation is carried out during the translation process, which improves the excavation efficiency.

[0031] Specifically, the device is placed on top of the caisson, with the outer support wall 201 attached to the outer wall of the caisson, the inner support wall 202 attached to the inner wall of the caisson, and the bottom translation component 203 in contact with the outer wall of the caisson. The motor 101 is started to drive the main shaft 101a to rotate, and the torque is transmitted to the soil discharge rollers 102a-11 inside the soil discharge belt 102 through the power belt 201a-2. The two soil discharge rollers 102a-11 at the front and rear of the soil discharge belt 102 are linked through the soil discharge belt 102b-1. The soil discharge belt 102 transmits the torque to the main digging roller 103a of the digging belt 103 through the digging belt 102c-4. Through linkage and cooperation with the secondary digging roller 103b, the digging belt 103 is driven to rotate, and the eccentric roller 103c-1 in the middle is driven to rotate through the digging belt 103. The height of the digging belt 103 is changed through linkage. At the same time, the motor 101 meshes with the bottom translation component 203, so that the entire device can move around the outer surface of the caisson.

[0032] In the above process, the cooperation between the excavation belt 103 and the discharge belt 102 enables the soil to be excavated by the excavation belt 103 and transported to the discharge belt 102, so that the soil can be discharged smoothly. During the excavation process, the bottom translation component 203 is linked with the drive motor 101, which can drive the entire device to make a circular motion along the outer wall of the caisson. During the excavation, the eccentric wheel can adjust the height between the excavation belt 103 and the soil layer, so that the excavation can obtain a certain downward impact force, making the excavation smoother and improving work efficiency.

[0033] Example 2

[0034] Reference Figures 2-7 This is the second embodiment of the present invention. This embodiment provides a vertical conveyor belt type excavation and soil disposal device, which differs from the first embodiment in that it includes:

[0035] The excavation and dumping unit 100 includes a drive motor 101, a dumping belt 102, and an excavation belt 103. The drive motor 101 is located on the side of the dumping belt 102, and the excavation belt 103 is connected to the dumping belt 102 via a belt drive. The support unit 200 includes an outer support wall 201, an inner support wall 202, and a bottom translation component 203. The outer support wall 201 and the inner support wall 202 are fixedly connected, and the bottom translation component 203 is located at the end of the outer support wall 201.

[0036] Furthermore, the drive motor 101 includes a main shaft 101a disposed at its end, a first drive gear 101a-1 disposed in the middle of the main shaft 101a, and a second drive gear 101a-2 disposed at the end of the main shaft 101a. The soil discharge belt 102 includes a first driven pulley 102a disposed at its end, the first driven pulley 102a includes a first transmission shaft 102a-1 fixedly connected thereto, and a soil discharge roller 102a-11 fixedly connected in the middle of the first transmission shaft 102a-1.

[0037] Preferably, a second driven pulley 102b is provided at the other end of the first drive shaft 102a-1. The second driven pulley 102b includes a soil discharge belt 102b-1 that cooperates with it. A third driven pulley 102c is provided on the other side of the soil discharge belt 102b-1. The third driven pulley 102c includes a second drive shaft 102c-1 that is fixedly connected to it. A fourth driven pulley 102c-2 is also provided on the side of the third driven pulley 102c. A fifth driven pulley 102c-3 is provided on the other side of the fourth driven pulley 102c-2. A digging belt 102c-4 is provided between the two.

[0038] Preferably, the outer support wall 201 includes a linkage bracket 201a disposed on its side, the linkage bracket 201a includes a linkage shaft 201a-1 disposed at its bottom, the linkage shaft 201a-1 is provided with a linkage gear 201a-11 on one side of the drive motor 101, a linkage pulley 201a-12 on the other side, and a power belt 201a-2 that is linked to the linkage pulley 201a-12.

[0039] In the previous embodiment, a caisson excavation method was mentioned, which includes placing a device on top of the caisson, with an outer support wall 201 attached to the outer wall of the caisson, an inner support wall 202 attached to the inner wall of the caisson, a bottom translation component 203 in contact with the outer wall of the caisson, and a start motor 101 driving the main shaft 101a to rotate. Torque is transmitted to the soil-discharging rollers 102a-11 inside the soil-discharging belt 102 via a power belt 201a-2. The two soil-discharging rollers 102a-11 at the front and rear of the soil-discharging belt 102 are connected by... The soil discharge belt 102b-1 is linked, and the soil discharge belt 102 transmits torque to the main digging roller 103a of the digging belt 103 through the digging belt 102c-4. Through linkage and cooperation with the secondary digging roller 103b, the digging belt 103 is driven to rotate. The eccentric roller 103c-1 in the middle is driven to rotate through the digging belt 103, and the height of the digging belt 103 is changed through linkage. At the same time, the motor 101 meshes with the bottom translation component 203, so that the entire device can move around the outer surface of the caisson.

[0040] In the above process, the cooperation between the excavation belt 103 and the discharge belt 102 enables the soil to be excavated by the excavation belt 103 and transported to the discharge belt 102, so that the soil can be discharged smoothly. During the excavation process, the bottom translation component 203 is linked with the drive motor 101, which can drive the entire device to make a circular motion along the outer wall of the caisson. During the excavation, the eccentric wheel can adjust the height between the excavation belt 103 and the soil layer, so that the excavation can obtain a certain downward impact force, making the excavation smoother and improving work efficiency.

[0041] In this embodiment, the first driving gear 101a-1 drives the linkage gear 201a-11 to rotate, which in turn drives the power belt 201a-2 to rotate, transmitting torque to the first driven pulley 102a, which in turn drives the soil discharge roller 102a-11 to rotate. The second driven pulley 102b is fixedly connected to the first transmission shaft 102a-1, so that the second driven pulley 102b drives the soil discharge belt 102b-1 to rotate. Therefore, the third driven pulley 102c and the fourth driven pulley 102c-2, which mesh with the soil discharge belt 102b-1, start to rotate, driving the excavation belt 102c-4, which meshes with them, to rotate, and in turn driving the excavation belt 103 to rotate.

[0042] Example 3

[0043] Reference Figures 1-7 This is the third embodiment of the present invention, which differs from the previous two embodiments in that: the digging belt 103 includes a digging main roller 103a disposed on its side, a third transmission shaft 103a-1 disposed on the inner side of the digging main roller 103a, and the digging belt 103 includes a digging auxiliary roller 103b disposed at its other end, and the digging auxiliary roller 103b includes a fixed shaft 103b-1 disposed on its inner side.

[0044] Preferably, the linkage gear 201a-11 meshes with the first drive gear 101a-1, and the tooth groove of the first drive gear 101a-1 is formed on the circumferential surface of the gear. The outer support wall 201 also includes a support assembly 201b for supporting the excavation belt 102. The support assembly 201b includes a first support column 201b-1 disposed on one side of the motor 101 and a second support column 201b-2 disposed on one side of the excavation belt 103.

[0045] Furthermore, the inner support wall 202 includes a movable block 202a disposed at its bottom and a connecting column 202b that movably cooperates with the movable block 202a. The movable block 202a includes an insert block 202a-1 disposed at its end and a movable support block 202a-2 disposed on its side. The connecting column 202b includes a connecting block 202b-1 disposed on its side, a fixing block 202b-2 disposed on its other side, and an adhesive plate 202b-3 disposed on the upper side of the connecting column 202b.

[0046] Preferably, the bottom translation component 203 includes a mating shaft 203a disposed on its side and a connecting plate 203b fixed to the outer support wall 201. The mating shaft 203a includes a translation gear 203a-1 disposed in its middle and a translation wheel 203a-2 disposed at its end.

[0047] In the previous embodiment, the first driving gear 101a-1 drives the linkage gear 201a-11 to rotate, which in turn drives the power belt 201a-2 to rotate, transmitting torque to the first driven pulley 102a, which in turn drives the soil discharge roller 102a-11 to rotate. The second driven pulley 102b is fixedly connected to the first transmission shaft 102a-1, so that the second driven pulley 102b drives the soil discharge belt 102b-1 to rotate. Therefore, the third driven pulley 102c and the fourth driven pulley 102c-2, which mesh with the soil discharge belt 102b-1, start to rotate, driving the excavation belt 102c-4, which meshes with them, to rotate, and in turn driving the excavation belt 103 to rotate.

[0048] Furthermore, the rotation of the excavating belt 103 drives the rotation of the cooperating main excavating roller 103a and auxiliary excavating roller 103b, as well as the rotation of the eccentric roller 103c-1 located in its middle. The rotation of the eccentric roller 103c-1 changes the tension of the excavating belt 103 at this location. Since the total length of the excavating belt 103 remains unchanged, when the eccentric roller 103c-1 supports the excavating belt 103, the auxiliary excavating roller 103b will receive an upward traction force. Under the linkage of the movable block 202a and the connecting column 202b that is movably cooperated with the movable block 202a, the movable block 202a moves upward. When the eccentric roller 103c-1 rotates to a position with a smaller radius, the movable block 202a returns to its original position under the action of gravity. At this time, a local up-and-down movement is formed. The movable block 202a and the connecting column 202b cooperate to maintain the straightness of the movable block 202a in the upward and downward directions, thereby improving the stability of the device.

[0049] Furthermore, the second drive gear 101a-2 meshes with the translation gear 203a-1 on the side of the bottom translation component 203, and the translation gear 203a-1 is fixed to the lower translation wheel 203a-2, so the translation wheel 203a-2 can move along the outer wall of the caisson.

[0050] In summary, the cooperation between the excavation belt 103 and the discharge belt 102 enables the soil to be excavated by the excavation belt 103 and transported to the discharge belt 102, allowing the soil to be discharged smoothly. During the excavation process, the bottom translation component 203 is linked with the drive motor 101, which can drive the entire device to move in a circular motion along the outer wall of the caisson. During excavation, the eccentric wheel can adjust the height between the excavation belt 103 and the soil layer, so that the excavation can obtain a certain downward impact force, making the excavation smoother and improving work efficiency.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for excavating a caisson, characterized in that: The vertical conveyor belt type excavation and soil disposal device includes... A soil excavation and dumping unit (100) includes a drive motor (101), a dumping belt (102), and a digging belt (103). The drive motor (101) is located on the side of the dumping belt (102), and the digging belt (103) is connected to the dumping belt (102) via a belt drive. The support unit (200) includes an outer support wall (201), an inner support wall (202), and a bottom translation component (203). The outer support wall (201) is fixedly connected to the inner support wall (202), and the bottom translation component (203) is disposed at the end of the outer support wall (201). The drive motor (101) includes a main shaft (101a) disposed at the end of the drive motor (101), a first drive gear (101a-1) disposed in the middle of the main shaft (101a), and a second drive gear (101a-2) disposed at the end of the main shaft (101a). The soil discharge belt (102) includes a first driven pulley (102a) disposed at the end of the soil discharge belt (102). The first driven pulley (102a) includes a first transmission shaft (102a-1) fixedly connected to the first driven pulley (102a). A soil discharge roller (102a-11) is fixedly connected to the middle of the first transmission shaft (102a-1). A second driven pulley (102b) is provided at the other end of the first drive shaft (102a-1). The second driven pulley (102b) includes a soil discharge belt (102b-1) that cooperates with the second driven pulley (102b). A third driven pulley (102c) is provided on the other side of the soil discharge belt (102b-1). The third driven pulley (102c) includes a second drive shaft (102c-1) that is fixedly connected to the third driven pulley (102c). A fourth driven pulley (102c-2) is also provided on the side of the third driven pulley (102c). A fifth driven pulley (102c-3) is provided on the other side of the fourth driven pulley (102c-2). A digging belt (102c-4) is provided between the fourth driven pulley (102c-2) and the fifth driven pulley (102c-3). The digging belt (103) includes a digging main roller (103a) disposed on the side of the digging belt (103), and a third drive shaft (103a-1) disposed on the inner side of the digging main roller (103a). The digging belt (103) includes a digging auxiliary roller (103b) disposed at the other end of the digging belt (103), and the digging auxiliary roller (103b) includes a fixed shaft (103b-1) disposed on the inner side of the digging auxiliary roller (103b). The outer support wall (201) includes a linkage bracket (201a) disposed on the side of the outer support wall (201). The linkage bracket (201a) includes a linkage shaft (201a-1) disposed at the bottom of the linkage bracket (201a). The linkage shaft (201a-1) is provided with a linkage gear (201a-11) on one side of the drive motor (101), a linkage pulley (201a-12) on the other side, and a power belt (201a-2) that is linked to the linkage pulley (201a-12). The inner support wall (202) includes a movable block (202a) disposed at the bottom of the inner support wall (202), and a connecting column (202b) that movably cooperates with the movable block (202a). The movable block (202a) includes an insert block (202a-1) disposed at the end of the movable block (202a), and a movable support block (202a-2) disposed on the side of the movable block (202a). The connecting column (202b) includes a connecting block (202b-1) disposed on the side of the connecting column (202b), a fixing block (202b-2) disposed on the other side of the connecting column (202b), and an adhesive plate (202b-3) disposed on the upper side of the connecting column (202b). The caisson excavation method includes placing a vertical conveyor belt-type excavation and soil removal device on top of the caisson, with the outer support wall (201) fitting against the outer wall of the caisson, the inner support wall (202) fitting against the inner wall of the caisson, and the bottom translation component (203) contacting the outer wall of the caisson. A motor (101) is started to drive the main shaft (101a) to rotate, and the torque is transmitted to the soil removal rollers (102a-11) inside the soil removal belt (102) via a power belt (201a-2). The two soil removal rollers (102a-11) at the front and rear of the soil removal belt (102) move through the soil removal belt (201a-2). 102b-1) Linkage, the soil discharge belt (102) transmits torque to the main digging roller (103a) of the digging belt (103) through the digging belt (102c-4). Through linkage and cooperation with the secondary digging roller (103b), the digging belt (103) is driven to rotate. The eccentric roller (103c-1) in the middle is driven to rotate through the digging belt (103) and the height of the digging belt (103) is changed through linkage. At the same time, the motor (101) meshes with the bottom translation component (203) so that the entire device can move around the outer surface of the caisson. The rotation of the excavation belt (103) drives the rotation of the main excavation roller (103a) and the auxiliary excavation roller (103b) that cooperate with the excavation belt (103), and also drives the rotation of the eccentric roller (103c-1) located in the middle of the excavation belt (103). The rotation of the eccentric roller (103c-1) changes the tension of the excavation belt (103) at this point. Since the total length of the excavation belt (103) remains unchanged, when the eccentric roller (103c-1) supports the excavation belt (103), the auxiliary excavation roller (103b) will receive an upward traction force. Under the linkage of the movable block (202a) and the connecting column (202b) that cooperates with the movable block (202a), the movable block (202a) moves upward. When the eccentric roller (103c-1) rotates to a position with a smaller radius, the movable block (202a) returns to its original position under the action of gravity. At this time, a local up-and-down movement is formed.

2. The caisson excavation method as described in claim 1, characterized in that: The linkage gear (201a-11) meshes with the first drive gear (101a-1), and the tooth groove of the first drive gear (101a-1) is opened on the circumferential surface of the gear. The outer support wall (201) also includes a support assembly (201b) for supporting the soil removal belt (102). The support assembly (201b) includes a first support column (201b-1) disposed on one side of the motor (101) and a second support column (201b-2) disposed on one side of the soil removal belt (103).

3. The caisson excavation method as described in claim 2, characterized in that: The bottom translation component (203) includes a mating shaft (203a) disposed on the side of the bottom translation component (203) and a connecting plate (203b) fixed to the outer support wall (201). The mating shaft (203a) includes a translation gear (203a-1) disposed in the middle of the mating shaft (203a) and a translation wheel (203a-2) disposed at the end of the mating shaft (203a).

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