Integrated supporting structure for excavation of existing underground structure and construction method thereof

Abstract

The application belongs to the technical field of underground engineering equipment, and discloses an integrated supporting structure for existing underground structure excavation and a construction method thereof, wherein the supporting structure comprises a butt joint column and a supporting column, the top of the butt joint column supports the top of the tunnel through a supporting beam, and further comprises a power assembly; the power assembly is placed on the top of the supporting column. The application further provides a construction method of the integrated supporting structure for existing underground structure excavation. Through cooperation of the power assembly and the compensation assembly and other structures, when the monitoring system in the device finds that the top of the tunnel is in settlement, the control motor is started, and the crawler driving gear is rotated, wherein it is worth noting that the driving rod is simultaneously movable on the top of the driving disc and the limiting disc, the driving disc is rotated, and the bottom of the driving rod is moved outward, at this time, the connecting block is moved upward, so as to achieve the purpose of adjusting the overall height of the device, and manual adjustment of the device is no longer needed subsequently.

Description

Technical Field

[0001] This invention belongs to the field of underground engineering equipment technology, specifically an integrated support structure for excavation of existing underground structures and its construction method. Background Technology

[0002] Underground structures generally refer to a type of underground engineering, including tunnel excavation or underground pipeline laying. Among these, underground pipeline laying is more common, and its overall workflow is relatively simple. Tunnel excavation, on the other hand, can be used for subway construction. It is generally carried out by using a tunnel boring machine to make the opening, and the inner wall of the tunnel is supported by steel reinforcement to prevent tunnel collapse.

[0003] Chinese invention patent CN102628368B discloses a self-moving support canopy for tunnels, comprising a front arch frame, a rear arch frame, forward-moving jacks, and supporting jacks. The front arch frame includes three or more front longitudinal beams and three or more front arch beams, all of which are longitudinally arranged along the arched upper surface of the front arch beams, with each front longitudinal beam connecting all the front arch beams. Supporting jacks are located below the front arch frame. The rear arch frame includes three or more rear longitudinal beams and three or more rear arch beams, all of which are longitudinally arranged along the arched upper surface of the rear arch beams, with each rear longitudinal beam connecting all the rear arch beams. Supporting jacks are located below the rear arch frame. The front and rear longitudinal beams are spaced apart, and there is a gap between each front arch beam and the adjacent rear arch beam in front of it. One end of each forward-moving jack is connected to the front arch frame, and the other end is connected to the rear arch frame. Both the front and rear arch beams are arched beams. This invention is time-saving, labor-saving, safe, and reliable.

[0004] In existing technologies, multiple temporary supports are generally used for support. This support method not only requires a large number of steel support frames, but also the support height is generally fixed. If the soil is heavy, the soil at the top of the tunnel will collapse downwards and cause deformation due to pressure. Furthermore, since existing technologies cannot adjust the overall height, manual repair is required for subsequent work to ensure the flatness of the tunnel, which is very troublesome. Therefore, we provide an integrated support structure for excavation of existing underground structures and its construction method. Summary of the Invention

[0005] To address the problems mentioned in the background section, this invention provides an integrated support structure for excavation of existing underground structures and its construction method, which solves the problem that the height of existing technologies is generally fixed and cannot be adjusted subsequently.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated support structure for excavation of existing underground structures, comprising connecting columns and supporting columns, wherein the top of the connecting columns supports the top of the tunnel via a supporting beam, and also includes a power assembly;

[0007] The power assembly is placed on top of the support column, and the power assembly is used to support the docking column.

[0008] A maintenance component, which is movable inside the power assembly;

[0009] A compensation component, which is used to raise the position of the docking post, and the compensation component slides vertically inside the power component;

[0010] The power assembly includes a housing placed on top of a support column, an inner liner fixedly installed inside the housing, a motor fixedly installed inside the inner liner, the motor being connected to gears via a track, and the track penetrating the outer surface of the inner liner;

[0011] The compensation component includes a limiting plate fixed inside the housing, a drive plate rotatably mounted on the top of the limiting plate, an internal gear connected to the inside of the housing by a spring, a drive rod passing through the top of the drive plate and the limiting plate, and a support plate connected to the drive rod by a connecting block. The connecting block moves vertically inside the housing. When the maintenance component is in the working state, it presses the internal gear to mesh with the gear, and the outer surface of the internal gear engages with the drive plate.

[0012] Preferably, the compensation assembly further includes a locking plate hinged to the outside of the liner. The locking plate is connected to the outside of the liner by a spring. The outside of the locking plate meshes with the inner wall of the internal gear. The teeth of the internal gear and the locking plate are both inclined and interlocked.

[0013] Preferably, the top of the limiting disk has a vertical groove at equal angles, and the top of the driving disk has an arc groove at equal angles, with the driving rod moving within both.

[0014] Preferably, the motor drives the gear to rotate via the track, and the gear drives the drive disc to rotate via the internal gear. The vertical groove at the top of the limiting disc restricts the drive rod to move only outward. The drive disc rotates and drives the drive rod to move outward. The drive rod changes from an inclined position to a vertical position. At this time, the drive rod drives the connecting block and the support plate to rise in their positions.

[0015] Preferably, the maintenance component includes a connecting frame that is slidably mounted on the outer surface of the housing, a support frame that is slidably mounted on the bottom of the connecting frame, a pressure component one that is fitted inside the support frame through a stabilizing workpiece, and a pressure component two that is movably mounted on the bottom of the pressure component one.

[0016] Preferably, the pressurizing component includes a spring telescopic rod hinged to the outside of the housing, a sleeve hinged to the outer surface of the housing, an extension rod sleeved inside the sleeve, the spring telescopic rod and the extension rod hinged together, the outer side of the extension rod hinged to the support plate, and the extension rod penetrating the stable workpiece.

[0017] Preferably, the second pressurizing component includes a second sleeve, the outer side of which is hinged to the outer surface of the outer shell, a drag rod is sleeved inside the second sleeve, one side of the drag rod is hinged to the support plate, and the other side of the drag rod is connected to a chuck via a chain.

[0018] Preferably, the chuck is rotatably mounted inside the liner, and the outer side of the chuck is connected to the chain via a spring plate.

[0019] Preferably, the maintenance assembly has four structures, excluding the connecting frame and the chuck, which are equidistantly arranged inside the housing.

[0020] Preferably, the construction method for the integrated support structure for excavation of existing underground structures includes the following specific steps:

[0021] S01: When the operator needs to perform support work, a support column needs to be constructed in advance, with steel bars reserved at the top for docking. Then, the power unit is placed on top of it, and the docking column is placed on top of the power unit. The top of the docking column contacts the support beam. By rotating the connecting frame, it is disengaged from the transverse groove on the outside of the shell. The connecting frame can move downward through the groove on the outside of the shell. Through the pressure of the spring telescopic rod, the sleeve will always be in a horizontal state. The spring telescopic rod will also push the upper end of one side of the support plate to move outward through the extension rod, while the spring plate of the chuck will pull the lower end of one side of the support plate to move inward to the inside of the device. At this time, the support plate can help the device fix the position between the support column and the power unit.

[0022] S02: When the maintenance component is in the fixing position, the pressure component is in a horizontal position and presses the internal gear downward. At this time, the internal gear is simultaneously connected to the drive disc and the gear. When the dynamic monitoring component inside the motor detects that the tunnel at the top of the support beam has settled, the motor is raised to compensate for the settlement through the control terminal to maintain the stability of the tunnel settlement. At this time, the drive disc is rotating, and the vertical groove at the top of the limit disc restricts the drive rod to move only outward. The rotation of the drive disc can only drive the drive rod to move outward. The drive rod changes from inclined to vertical. At this time, the connecting block and the support plate raise their positions. It should be noted that the shape of the locking plate can effectively prevent the support beam from being affected by the pressure of gravity, thus affecting the support state of the drive rod. The locking plate can prevent the internal gear from rotating in the opposite direction.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] This invention, through the coordinated arrangement of power components and compensation components, enables the control motor to start when the monitoring system detects settlement at the top of the tunnel. This motor drives the track-driven gears to rotate, which in turn rotates the internal gears. It's important to note that the internal gears engage with the drive disc, and the drive rod moves simultaneously between the top of the drive disc and the top of the limiting disc. The limiting disc is in a fixed position. The rotation of the drive disc causes the bottom of the drive rod to move outwards, and its top hinges to the connecting block. This causes the connecting block to move upwards, thereby adjusting the overall height of the device. This allows the device to be adjusted according to the degree of tunnel settlement.

[0025] This invention, through the coordinated arrangement of maintenance and power components, allows the device to be placed atop a support column when required for support work. The top of the power component supports the beam via a connecting column, while the support plate contacts the perimeter of the support column. The maintenance component, except for the connecting frame, comprises four structures evenly distributed around the outer shell, thus fixing the overall position of the device. Subsequently, the support plate can be moved upwards via the connecting frame, allowing the power component to be detached from the support column. Concrete is then filled using the pre-reserved steel bars between the support column and the connecting column, providing permanent support and further enhancing the ease of use of the device.

[0026] This invention, through the coordination of maintenance and compensation components, allows the device to operate without support. When the device no longer requires support, the connecting frame controls the sleeve two to move upwards. At this point, the top of the internal gear is no longer compressed, the spring two springs upwards to push the internal gear, the motor no longer contacts the internal gear, and the drive disc cannot control the movement of the drive rod. The gravity of the connecting block presses the drive rod, causing it to move towards the center of the device through the sliding groove of the limiting disc. At this point, the drive rod moves downwards and no longer supports the docking column. Even if the motor is rotating, it will no longer cause the compensation component to rise, further improving the safety of the device. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0029] Figure 3 This is a schematic diagram showing the structural cooperation between the maintenance component and the power component of the present invention;

[0030] Figure 4 This is a schematic diagram showing the structural cooperation between pressurizing component one and pressurizing component two of the present invention;

[0031] Figure 5 This is a schematic diagram showing the cooperation between the second pressure component and the chuck structure of the present invention;

[0032] Figure 6 This is a schematic diagram showing the interaction between the drive rod and the outer shell structure of the present invention;

[0033] Figure 7 This is a schematic diagram showing the connection relationship between the drive rod and the limiting plate of the present invention;

[0034] Figure 8 This is a schematic diagram of the engagement between the second pressurizing component of the present invention and the internal gear;

[0035] Figure 9 This is a cross-sectional schematic diagram of the internal structure of the compensation component of the present invention.

[0036] In the diagram: 100, docking column; 200, support column; 300, power assembly; 301, outer shell; 302, inner liner; 303, motor; 304, track; 305, gear; 400, maintenance assembly; 401, connecting frame; 402, support frame; 403, support plate; 404, pressure assembly one; 4041, spring telescopic rod; 4042, sleeve one; 4043, extension rod; 405, pressure assembly two; 4051, sleeve two; 4052, drag bar; 4053, chain; 406, stabilizing workpiece; 407, chuck; 500, compensation assembly; 501, support plate; 502, connecting block; 503, drive rod; 504, drive disc; 505, limit disc; 506, internal gear; 507, locking plate; 508, spring one; 509, spring two. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1 to 9 As shown, the present invention provides an integrated support structure for the excavation of existing underground structures.

[0039] As shown in the figure, it includes a docking column 100 and a support column 200. The top of the docking column 100 supports the top of the tunnel through a supporting beam. It also includes a power assembly 300.

[0040] The power assembly 300 is placed on top of the support column 200, and the power assembly 300 is used to support the docking column 100.

[0041] Maintenance component 400 is located inside the power component 300;

[0042] The compensation component 500 is used to raise the position of the docking post 100, and the compensation component 500 slides vertically inside the power component 300;

[0043] The power assembly 300 includes a housing 301 placed on top of the support column 200. An inner liner 302 is fixedly installed inside the housing 301. A motor 303 is fixedly installed inside the inner liner 302. The motor 303 is connected to a gear 305 via a track 304. The track 304 passes through the outer surface of the inner liner 302.

[0044] The compensation component 500 includes a limiting plate 505 fixed inside the housing 301. A drive plate 504 is rotatably mounted on the top of the limiting plate 505. An internal gear 506 is connected inside the housing 301 via a spring 508. A drive rod 503 passes through the tops of the drive plate 504 and the limiting plate 505. The drive rod 503 is connected to a support plate 501 via a connecting block 502. The connecting block 502 moves vertically inside the housing 301. When the maintenance component 400 is in the working state, it presses against the internal gear 506 and... Gear 305 meshes, and the outer surface of the internal gear 506 engages with the drive disc 504. Motor 303 drives gear 305 to rotate via track 304. Gear 305 drives drive disc 504 to rotate via internal gear 506. The vertical groove at the top of limit disc 505 restricts drive rod 503 to move only outward. Drive disc 504 rotates and drives drive rod 503 to move outward. Drive rod 503 changes from inclined to vertical. At this time, drive rod 503 drives connecting block 502 and support plate 501 to rise in their positions.

[0045] The above scheme is adopted as follows: When the maintenance component 400 is performing fixed work, the pressure component 404 is in a horizontal state and presses the internal gear 506 downward. At this time, the internal gear 506 is simultaneously connected to the drive disk 504 and the gear 305. When the dynamic monitoring component set inside the motor 303 detects that the tunnel at the top of the support beam has settled, the motor 303 is controlled by the control terminal to raise the compensation component 500 to maintain the stability of the tunnel settlement. At this time, the drive disk 504 is in a rotating state, and the vertical groove at the top of the limit disk 505 restricts the drive rod 503 to only move outward. The rotation of the drive disk 504 can only drive the drive rod 503 to move outward. The drive rod 503 changes from inclined to vertical. At this time, the connecting block 502 and the support plate 501 raise their positions, which further improves the working efficiency of the device and eliminates the time required for subsequent operators to manually adjust its height.

[0046] like Figure 8 , Figure 9As shown, the compensation assembly 500 also includes a locking plate 507 hinged to the outside of the inner liner 302. The locking plate 507 is connected to the outside of the inner liner 302 by a spring 508. The outside of the locking plate 507 meshes with the inner wall of the internal gear 506. The teeth of the internal gear 506 and the locking plate 507 are both inclined and interlocked. The top of the limiting disk 505 is provided with a vertical groove at an equal angle in the ring. The top of the driving disk 504 is provided with an arc groove at an equal angle in the ring. The driving rod 503 moves simultaneously inside both.

[0047] Using the above solution: When motor 303 stops rotating, the power to rotate drive disc 504 disappears. At this time, due to the pressure of the top support beam of docking column 100 and the weight of the tunnel itself, support plate 501 and connecting block 502 will inevitably descend. During the descent, through the arc groove on the top of drive disc 504, it will rotate in the opposite direction. Locking plate 507, through the elastic force of spring 508, can always lock internal gear 506 and make it rotate only in one direction. At this time, drive disc 504 can no longer rotate in the opposite direction, and the position of the compensation component 500 as a whole is fixed, and its height will not decrease. This further improves the stability of the device's operation. When the device is no longer needed... When support work is to be performed, the connecting frame 401 controls the sleeve 4051 to move upward. At this time, the sleeve 4051 no longer presses against the top of the internal gear 506, the spring 509 bounces the internal gear 506 upward, the motor 303 no longer contacts the internal gear 506, and the drive disc 504 cannot control the movement of the drive rod 503. The drive rod 503 is pressed by the gravity of the connecting block 502, and it moves towards the center of the device through the sliding groove of the limiting disc 505. At this time, the drive rod 503 moves downward and no longer supports the docking column 100. Even if the motor 303 is rotating, it will no longer drive the compensation component 500 to rise, further improving the safety of the device.

[0048] like Figures 2-5 As shown, the maintenance component 400 includes a connecting frame 401 slidably mounted on the outer surface of the housing 301. A support frame 402 is slidably mounted on the bottom of the connecting frame 401. A pressure component 404 is sleeved inside the support frame 402 through a stabilizing workpiece 406. A pressure component 405 is movably mounted on the bottom of the pressure component 404. The pressure component 404 includes a spring telescopic rod 4041 hinged to the outside of the housing 301. A sleeve 4042 is hinged to the outer surface of the housing 301. An extension rod 4043 is sleeved inside the sleeve 4042. The spring telescopic rod 4041 is hinged to the extension rod 4043. The outside of the extension rod 4043 is hinged to the support plate 403. The extension rod 4043 passes through the stabilizing workpiece 406.

[0049] The above solution involves a vertically movable connecting frame 401 via a slot on the outer surface of the housing 301, with a transverse slot at the top of the slot. By pulling the connecting frame 401 upwards and rotating it, the connecting frame 401 can be fixedly engaged with the transverse slot. When the maintenance component 400 is in operation, the spring telescopic rod 4041 always provides downward pressure to the sleeve 4042, enabling it to more stably fix the position of the support column 200. Since the support column 200 has no specified size requirements and is a temporary, manually constructed structure, its dimensions may deviate to some extent. The support plate 403 is connected to the sleeve 4042 via the extension rod 4043, and the overall design does not have a fixed structure. Furthermore, while fixing the position of the device, it can also be used for support columns 200 of different specifications.

[0050] like Figures 2-5 As shown, the second pressurizing component 405 includes a second sleeve 4051. The outer side of the second sleeve 4051 is hinged to the outer surface of the outer shell 301. A drag rod 4052 is sleeved inside the second sleeve 4051. One side of the drag rod 4052 is hinged to the support plate 403. The other side of the drag rod 4052 is connected to a chuck 407 via a chain 4053. The chuck 407 is rotatably installed inside the liner 302. The outer side of the chuck 407 is connected to the chain 4053 via a spring plate. The maintenance component 400 has four structures other than the connecting frame 401 and the chuck 407, which are equidistantly arranged inside the outer shell 301.

[0051] Using the above scheme: the spring plate of the chuck 407 pulls the lower end of one side of the support plate 403 toward the inward side of the device through the chain 4053 and the drag bar 4052, while the spring telescopic rod 4041 pushes the upper end of one side of the support plate 403 toward the outward side through the extension rod 4043. At this time, the inner wall of the support plate 403 can better fix the position between the power component 300 and the support column 200. When the connecting frame 401 controls the support frame 402 to move upward, the outer sides of the pressure component 1 404 and the pressure component 2 405, as well as the support plate 403, will also move upward. The length of the spring telescopic rod 4041 is shortened, which further improves the fixing effect of the device.

[0052] The construction method for an integrated support structure for excavation of existing underground structures involves the following specific steps:

[0053] S01: When the operator needs to perform support work, a support column 200 needs to be constructed in advance, with a steel bar reserved at the top for docking. Then, the power component 300 is placed on top of it, and the docking column 100 is placed on top of the power component 300. The top of the docking column 100 contacts the supporting beam. By rotating the connecting frame 401, it is disengaged from the transverse groove on the outside of the housing 301. The connecting frame 401 can move downward through the groove on the outside of the housing 301. By the pressure of the spring telescopic rod 4041, the sleeve 4042 will always be in a horizontal state. The spring telescopic rod 4041 will also push the upper end of one side of the support plate 403 to move outward through the extension rod 4043. The spring plate of the chuck 407 will pull the lower end of one side of the support plate 403 to move inward to the inside of the device. At this time, the support plate 403 can help the device fix the position between the support column 200 and the power component 300.

[0054] S02: When the maintenance component 400 is in a fixed position, the pressure component 404 is in a horizontal state and presses the internal gear 506 downward. At this time, the internal gear 506 is simultaneously connected to the drive disk 504 and the gear 305. When the dynamic monitoring component inside the motor 303 detects that the tunnel at the top of the support beam has settled, the motor 303 is controlled by the control terminal to raise the compensation component 500 to maintain the stability of the tunnel settlement. At this time, the drive disk 504 is in a rotating state, and the vertical groove at the top of the limit disk 505 restricts the drive rod 503 to move only outward. The rotation of the drive disk 504 can only drive the drive rod 503 to move outward. The drive rod 503 changes from inclined to vertical. At this time, the connecting block 502 and the support plate 501 raise their positions. It should be noted that the shape of the locking plate 507 can effectively prevent the support beam from being affected by the pressure of gravity, thus affecting the support state of the drive rod 503. The locking plate 507 can prevent the internal gear 506 from rotating in the opposite direction.

[0055] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0056] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated support structure for excavation of existing underground structures, comprising connecting columns (100) and supporting columns (200), characterized in that: The top of the docking column (100) is supported by a support beam to support the top of the tunnel, and also includes a power assembly (300); The power assembly (300) is placed on top of the support column (200), and the power assembly (300) is used to support the docking column (100). Maintenance component (400), said maintenance component (400) being movable inside the power component (300); A compensation component (500) is used to raise the position of the docking post (100), and the compensation component (500) slides vertically inside the power component (300); The power assembly (300) includes a housing (301) placed on top of the support column (200), an inner liner (302) fixedly installed inside the housing (301), a motor (303) fixedly installed inside the inner liner (302), and the motor (303) being connected to a gear (305) via a track (304), the track (304) penetrating the outer surface of the inner liner (302); The compensation component (500) includes a limiting disk (505) fixed inside the housing (301). A drive disk (504) is rotatably mounted on the top of the limiting disk (505). An internal gear (506) is connected inside the housing (301) via a spring (508). A drive rod (503) passes through the top of the drive disk (504) and the limiting disk (505). A support plate (501) is connected to the drive rod (503) via a connecting block (502). The connecting block (502) moves vertically inside the housing (301). When the maintenance component (400) is in the working state, it presses the internal gear (506) to mesh with the gear (305), and the outer surface of the internal gear (506) engages with the drive disk (504).

2. The integrated support structure for excavation of existing underground structures according to claim 1, characterized in that: The compensation component (500) also includes a locking plate (507) hinged to the outside of the liner (302). The locking plate (507) is connected to the outside of the liner (302) by a spring (508). The outside of the locking plate (507) meshes with the inner wall of the internal gear (506). The teeth of the internal gear (506) and the locking plate (507) are both inclined and interlocked.

3. The integrated support structure for excavation of existing underground structures according to claim 2, characterized in that: The top of the limiting disk (505) has a vertical groove at equal angles, and the top of the driving disk (504) has an arc groove at equal angles. The driving rod (503) moves within both of them simultaneously.

4. The integrated support structure for excavation of existing underground structures according to claim 3, characterized in that: The motor (303) drives the gear (305) to rotate via the track (304). The gear (305) drives the drive disk (504) to rotate via the internal gear (506). The vertical groove at the top of the limiting disk (505) restricts the drive rod (503) to move only outward. The drive disk (504) rotates and drives the drive rod (503) to move outward. The drive rod (503) changes from inclined to vertical. At this time, the drive rod (503) drives the connecting block (502) and the support plate (501) to rise in their positions.

5. The integrated support structure for excavation of existing underground structures according to claim 4, characterized in that: The maintenance component (400) includes a connecting frame (401) slidably mounted on the outer surface of the housing (301), a support frame (402) slidably mounted on the bottom of the connecting frame (401), a pressure component one (404) is sleeved inside the support frame (402) through a stabilizing workpiece (406), and a pressure component two (405) is movably mounted on the bottom of the pressure component one (404).

6. The integrated support structure for excavation of existing underground structures according to claim 5, characterized in that: The pressurizing component (404) includes a spring telescopic rod (4041) hinged to the outside of the housing (301). A sleeve (4042) is hinged to the outer surface of the housing (301). An extension rod (4043) is sleeved inside the sleeve (4042). The spring telescopic rod (4041) is hinged to the extension rod (4043). The outside of the extension rod (4043) is hinged to the support plate (403). The extension rod (4043) passes through the stable workpiece (406).

7. The integrated support structure for excavation of existing underground structures according to claim 6, characterized in that: The second pressurizing component (405) includes a second sleeve (4051), the outer side of which is hinged to the outer surface of the outer shell (301), and a drag rod (4052) is sleeved inside the second sleeve (4051). One side of the drag rod (4052) is hinged to the support plate (403), and the other side of the drag rod (4052) is connected to a chuck (407) via a chain (4053).

8. The integrated support structure for excavation of existing underground structures according to claim 7, characterized in that: The chuck (407) is rotatably mounted inside the liner (302), and the outer side of the chuck (407) is connected to the chain (4053) via a spring plate.

9. The integrated support structure for excavation of existing underground structures according to claim 8, characterized in that: The maintenance component (400) has four structures, except for the connecting frame (401) and the chuck (407), which are equidistantly arranged inside the outer shell (301).

10. The construction method of the integrated support structure for excavation of existing underground structures according to claim 9, characterized in that; The construction method for the integrated support structure for excavation of existing underground structures includes the following specific steps: S01: When the operator needs to perform support work, a support column (200) needs to be constructed in advance, with steel bars reserved at the top for docking. Then, the power assembly (300) is placed on top of it, and the docking column (100) is placed on top of the power assembly (300). The top of the docking column (100) contacts the supporting beam. By rotating the connecting frame (401), it is disengaged from the transverse groove on the outside of the housing (301). The connecting frame (401) can then move downward through the groove on the outside of the housing (301). When the spring telescopic rod (4041) is pressed, the sleeve (4042) will always be in a horizontal state. The spring telescopic rod (4041) will also push the upper end of the support plate (403) to move outward through the extension rod (4043), while the spring plate of the chuck (407) will pull the lower end of the support plate (403) to move inward. At this time, the support plate (403) can help fix the position between the support column (200) and the power component (300). S02: When the maintenance component (400) is in a fixed position, the pressure component (404) is horizontal and presses the internal gear (506) downward. At this time, the internal gear (506) is simultaneously connected to the drive disc (504) and the gear (305). When the dynamic monitoring component inside the motor (303) detects that the tunnel at the top of the supporting beam has settled, the motor (303) is controlled by the control terminal to raise the compensation component (500) to maintain the stability of the tunnel settlement. At this time, the drive disc (504) is rotating, and the limit disc (505) is on top. The vertical groove of the part restricts the drive rod (503) to move only outward. The rotation of the drive disc (504) can only drive the drive rod (503) to move outward. The drive rod (503) changes from inclined to vertical. At this time, the connecting block (502) and the support plate (501) raise their positions. It should be noted that the shape of the locking plate (507) can effectively prevent the support beam from being affected by the pressure of gravity, thus affecting the support state of the drive rod (503). At this time, the locking plate (507) can prevent the internal gear (506) from rotating in the opposite direction.

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