A concrete support structure and construction method using a local servo system

Abstract

This application relates to the technical field of foundation pit construction, and more particularly to a concrete support structure using a localized servo system. The structure includes a retaining wall, force-applying devices, and a concrete transverse support system. The transverse support system includes a ring beam, which supports the inner wall of the retaining wall. The ring beam comprises an inner beam, an outer beam, and a beam body. The beam bodies are located at both ends of each side of the retaining wall. The inner beam is located at the middle of each side of the retaining wall, and its two ends are fixedly connected to two adjacent beam bodies. The outer beam is parallel to the inner beam and has the same height as the inner beam. The outer beam is located on the side of the inner beam facing the corresponding inner wall of the retaining wall. Multiple force-applying devices are spaced apart between the outer and inner beams. The ends of the outer beams are connected to the beam bodies via sliding supports, the sliding direction of which is horizontal and perpendicular to the axis of the outer beam. This application effectively utilizes the force-applying devices installed at the edges of the transverse support system.

Description

Technical Field

[0001] This application relates to the technical field of foundation pit construction, and in particular to a concrete support structure and construction method that uses a servo system in a localized manner. Background Technology

[0002] An excavation pit is a pit dug at the foundation design location according to the base elevation and foundation plane dimensions. Excavation pits are divided into supported excavation pits and unsupported excavation pits based on geological conditions and excavation depth. When a supported excavation pit is used, the support process is to excavate and support simultaneously. Through support, the stability of the soil around the excavation pit can be ensured, reducing the collapse of the excavation pit.

[0003] A related technology discloses a support system for actively controlling the displacement of an excavation pit, comprising a retaining structure, adjustable force-applying devices, a concrete transverse support system, and a column system. The force-applying devices are arranged horizontally, with both ends connected to the retaining structure and the concrete transverse support system, respectively. The concrete transverse support system is an integral rod structure, and the column system provides vertical support to the concrete transverse support system. The retaining structure is a diaphragm wall, and the column system consists of steel lattice columns or concrete lattice columns. In use, multiple force-applying devices are installed along the edge of the excavation pit in the concrete transverse support system. These devices apply horizontal forces to the retaining structure, thereby resisting the collapse of the excavation pit.

[0004] However, the aforementioned structural reinforcement devices are simultaneously arranged on the entire side of the concrete transverse support system, while the soil deformation at both ends of the transverse support system is relatively small, resulting in a waste of the reinforcement devices. Summary of the Invention

[0005] In order to make full use of the force-adding devices installed at the edge of the transverse support system, this application provides a concrete support structure and construction method that locally adopts a servo system.

[0006] This application provides a concrete support structure that partially employs a servo system, using the following technical solution:

[0007] A concrete support structure employing a localized servo system includes an enclosure, force-applying devices, and a concrete transverse support system. The transverse support system includes a ring beam supporting the inner wall of the enclosure. The ring beam comprises an inner beam, an outer beam, and a beam body. The beam bodies are located at both ends of each side of the enclosure. The inner beam is located at the middle of each side of the enclosure, with both ends fixed to two adjacent beam bodies. The outer beam is parallel to the inner beam and has the same height as the inner beam. The outer beam is located on the side of the inner beam facing the corresponding inner wall of the enclosure. Multiple force-applying devices are spaced apart between the outer and inner beams. The ends of the outer beams are connected to the beam bodies via sliding supports, the sliding direction of which is horizontal and perpendicular to the axis of the outer beam.

[0008] By adopting the above technical solution, during use, the beam body is located at both ends of the side length of the enclosure. No force-adding devices are installed at the position of the beam body. An outer beam and an inner beam of the ring beam are installed in the middle of the enclosure. The end of the outer beam is connected to the beam body through a sliding support. The sliding support allows the outer beam to be positioned perpendicular to the axis of the outer beam relative to the beam body. At the same time, the sliding support can transfer the axial force of the outer beam to the two beam bodies. When multiple force-adding devices apply force between the outer beam and the inner beam, the outer beam strengthens the position in the middle of the side length of the enclosure, reducing the number of force-adding devices installed at the edge of the entire ring beam, thereby achieving the effect of making full use of the force-adding devices installed at the edge of the transverse support system.

[0009] Preferably, the beam body has an extension section at the end near the outer beam, the cross-section of the extension section is the same as the cross-section of the outer beam, and the end of the extension section away from the beam body faces the outer beam; the sliding support is installed between the extension section and the outer beam.

[0010] By adopting the above technical solution, the cross-section of the extension section is the same as that of the outer beam, so that the end of the outer beam is connected to the extension section through a sliding support, and the outer beam transitions to the beam body through the extension section, thereby improving the stability of force transmission between the outer beam and the beam body.

[0011] Preferably, the sliding support includes two steel plates, one of which is fixed to the end of the extension section and the other is fixed to the end of the outer beam. The surfaces of the two steel plates are parallel and abut against each other, and the steel plates are perpendicular to the axis of the outer beam.

[0012] By adopting the above technical solution, one steel plate is fixed to the extension section, and the other steel plate is fixed to the end of the outer beam, so that the outer beam and the beam body transmit force through the mutual contact of the two steel plates. At the same time, the friction when the two steel plates slide relative to each other is small, which facilitates the sliding of the outer beam relative to the extension section.

[0013] Preferably, the sliding support includes a toothed plate and an abutment block. There are two toothed plates, one fixed to the end of the extension section and the other fixed to the end of the outer beam. The two toothed plates have grooves on their parallel and opposite surfaces. The abutment block is a quadrangular prism and is vertically slidably connected in the groove. A wedge is provided between the bottom of the groove and the abutment block, and the side of the abutment block away from the wedge abuts against each other.

[0014] By adopting the above technical solution, grooves are opened on the opposing surfaces of the two tooth plates, and abutment blocks are placed in the grooves. When the distance between the outer beam and the beam body is large, the distance between the two abutment blocks is adjusted by placing wedges in the grooves, so that the two abutment blocks can effectively transfer the force of the outer beam to the beam body. At the same time, it is also convenient to place the abutment blocks in the grooves, which facilitates the construction of the sliding support.

[0015] Preferably, the angle between the surfaces of the two abutting blocks that are close to each other and the direction of the force applied by the force-applying device is less than or equal to 2 degrees.

[0016] By adopting the above technical solution, when the force of the force-applying device pushes the outer beam to move, the two abutting blocks are misaligned with each other, causing the surfaces of the two abutting blocks that are close to each other to press against each other, further increasing the axial force between the outer beam and the beam body. At the same time, since the angle between the surfaces of the two abutting blocks that are close to each other and the direction of the force of the force-applying device is small, the reaction force generated on the force-applying device is small.

[0017] Preferably, a corbel is fixedly installed on the inner wall of the enclosure, the outer beam is placed on the corbel, and the inner beam has multiple outward extensions on the side close to the outer beam; the outward extensions are located directly above the corbel and are placed on the corbel.

[0018] By adopting the above technical solution, the corbel is first set on the inner wall of the enclosure, and then multiple outward sections are set on the inner beam directly above the corbel, so that the outward sections can rest on the corbel, allowing the corbel to support the inner beam and improve the stability of the inner beam.

[0019] Preferably, a diagonal bracing bar is provided above the outer beam, one end of the diagonal bracing bar is fixed to the enclosure by means of rebar anchoring, and the lower end of the diagonal bracing bar is embedded in the outer beam away from the side wall of the enclosure.

[0020] By adopting the above technical solution, one end of the diagonal tie bar is fixed to the enclosure, and the other end is fixed to the outer beam, so that the outer beam is further fixed under the action of the diagonal tie bar, thereby improving the stability of the outer beam.

[0021] Preferably, an inclined beam is provided at one end of the beam body near the inner beam. The inclined beam, the beam body, and the inner beam are integrally formed. As the inclined beam extends along the length direction of the outer beam, it gradually tilts towards the end of the inner beam.

[0022] By adopting the above technical solution, the inclined beam is connected between the beam body and the inner beam. At the same time, as the inclined beam extends along the length direction of the outer beam, it gradually tilts towards the end of the inner beam, thereby enabling the inclined beam to better transmit the axial force of the inner beam to the beam body.

[0023] This application also provides a method for constructing concrete supports using a servo system in a localized manner, employing the following technical solution:

[0024] A concrete support construction method using a local servo system includes pressurizing a force-applying device between the inner and outer beams, the force-applying device including hydraulic cylinders; the hydraulic cylinders, arranged from both ends of the outer beam towards the middle of the outer beam, gradually increase the force exerted on the outer beam.

[0025] By adopting the above technical solution, the force-adding device includes a hydraulic cylinder. As the force of the hydraulic cylinder at the end of the outer beam gradually increases to the force of the hydraulic cylinder at the middle of the outer beam, the force generated by the force-adding device is better adapted to the support of the enclosure.

[0026] Preferably, the force exerted by the hydraulic cylinder at the end of the outer beam on the outer beam is equal to the earth pressure balance force.

[0027] By adopting the above technical solution, the hydraulic cylinder force at the end of the outer beam is equal to the earth pressure balance force. Since no force-applying device is installed on the beam body, the pressure on the beam body is equal to the earth pressure balance force, thus enabling a smooth transition at the interface between the outer beam and the beam body.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. By using sliding supports, the outer beam can be positioned perpendicular to the axis of the outer beam relative to the beam body. At the same time, the sliding supports can transfer the axial force of the outer beam to the two beam bodies. When multiple force-applying devices apply force between the outer beam and the inner beam, the outer beam strengthens the position at the middle of the side length of the enclosure, reducing the number of force-applying devices installed at the edge of the entire ring beam, thereby achieving the effect of making full use of the force-applying devices installed at the edge of the transverse support system.

[0030] 2. When the distance between the outer beam and the beam body is large, the distance between the two abutting blocks can be adjusted by placing wedges in the tooth groove. This allows the two abutting blocks to effectively transfer the force of the outer beam to the beam body. It also makes it easier to place the abutting blocks in the tooth groove, which facilitates the construction of the sliding support.

[0031] 3. The force exerted by the hydraulic cylinders at the ends of the outer beam gradually increases from the hydraulic cylinders at the middle of the outer beam, so that the force generated by the force-applying device can better adapt to the support of the enclosure. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0033] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0034] Figure 3 This is a schematic diagram of the force distribution applied by multiple hydraulic cylinders in Embodiment 1 of this application;

[0035] Figure 4 This is a schematic diagram showing the position of the cow leg in Embodiment 1 of this application;

[0036] Figure 5 This is a schematic diagram of the sliding support in Embodiment 2 of this application.

[0037] Explanation of reference numerals in the attached drawings: 1. Enclosure; 2. Force-applying device; 21. Hydraulic cylinder; 3. Concrete transverse support system; 31. Ring beam; 311. Inner beam; 312. Outer beam; 313. Beam body; 314. Extension section; 315. Inclined beam; 316. Outward extension section; 4. Sliding support; 41. Steel plate; 42. Tooth plate; 421. Tooth groove; 43. Abutment block; 44. Sealing plate; 45. Wedge block; 5. Placement groove; 51. Groove body; 52. Groove plate; 6. Abutment plate; 7. Corbel; 8. Diagonal reinforcing bar. Detailed Implementation

[0038] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0039] This application discloses a concrete support structure and construction method that partially employs a servo system.

[0040] Example 1:

[0041] This embodiment discloses a concrete support structure that partially employs a servo system, referencing... Figure 1 The foundation pit consists of a retaining wall 1, a reinforcement device 2, and a concrete transverse support system 3. The retaining wall 1 is a diaphragm wall and forms the inner edge of the excavated pit. The concrete transverse support system 3, a cast-in-place concrete structure, is installed inside the retaining wall 1. During the excavation, when the excavation depth allows for the installation of one layer of the concrete transverse support system 3, the formwork for pouring the concrete transverse support system 3 is erected, and construction is carried out through on-site concrete pouring. The reinforcement device 2 is positioned between the concrete transverse support system 3 and the retaining wall 1 to apply a horizontal force to the retaining wall 1. Because the concrete transverse support system 3 is horizontally arranged and surrounded by reinforcement devices 2, it can resist the inward collapse of the foundation pit.

[0042] refer to Figure 2 The concrete transverse support system 3 includes a ring beam 31, which is laid along the entire edge of the foundation pit. The ring beam 31 is an integral structure, comprising an inner beam 311, an outer beam 312, and a beam body 313. The beam body 313 is located at both ends of the foundation pit's edge, while the inner beam 311 and outer beam 312 are located at the middle of the foundation pit's edge, forming a circumferential structure that abuts against the inner wall of the retaining structure 1. The two ends of the inner beam 311 are the two end beam bodies 313, and the inner beam 311 and the beam body 313 are integrally cast concrete structures. The outer beam 312 is parallel to the inner beam 311 and is set at the same height. The outer beam 312 is attached to the side wall of the pit, and the inner beam 311 is located on the side of the outer beam 312 near the middle of the pit. The inner beam 311 and the outer beam 312 are spaced apart. The space between the inner beam 311 and the outer beam 312 can be used to place the force-adding device 2.

[0043] refer to Figure 2 The beam body 313 abuts against the inner wall of the retaining structure 1 to support the soil at both ends of the foundation pit. An extension section 314 is provided near the outer beam 312 of the beam body 313. The cross-section of the extension section 314 is the same as that of the outer beam 312, with one end of the extension section 314 away from the beam body 313 facing the outer beam 312. A sliding support 4 is provided between the ends of the extension section 314 and the outer beam 312 that are close to each other. The sliding support 4 allows the outer beam 312 to move relative to the extension section 314 in a direction perpendicular to the axis of the outer beam 312, and also transmits the axial force of the outer beam 312, allowing the beam body 313 to cooperate with the outer beam 312 in bearing the compressive force along the foundation pit sidewalls facing both ends of the outer beam 312. The length direction of the force-applying device 2 is perpendicular to the outer beam 312. When the force-applying device 2 applies force, it can drive the outer beam 312 to move horizontally perpendicular to its axis, causing the outer beam 312 to abut against the inner wall of the foundation pit. In this embodiment, the sliding support 4 includes two steel plates 41, which are respectively fixed to the ends of the extension section 314 and the outer beam 312. The two steel plates 41 are perpendicular to the outer beam 312 and are fixed to the concrete by pre-embedded reinforcing bars, ensuring a relatively firm connection between the two steel plates 41 and the extension section 314 and the outer beam 312. The opposing surfaces of the two steel plates 41 are parallel to the sliding direction of the outer beam 312 relative to the extension section 314, allowing the two steel plates 41 to slide relative to each other while transmitting forces along the axial direction of the outer beam 312.

[0044] refer to Figure 2An inclined beam 315 is provided on one end of the beam body 313 near the inner beam 311. The inclined beam 315 connects the beam body 313 and the inner beam 311, and the inclined beam 315, the beam body 313, and the inner beam 311 are integrally formed. One end of the inclined beam 315 is connected to the beam body 313, and the other end is connected to the end of the inner beam 311. The inclined beam 315 gradually approaches the inner beam 311 from the beam body 313 along the extension direction of the extension section 314, so that the axial force of the inner beam 311 can be transmitted to the beam body 313 through the inclined beam 315. The force-applying device 2 includes a hydraulic cylinder 21, which is horizontally arranged. One end of the hydraulic cylinder 21 abuts against the side of the inner beam 311 near the outer beam 312, and the other end abuts against the side of the outer beam 312 near the inner beam 311. Since the structure formed by the inner beam 311 and the beam body 313 is a frame structure, the inner beam 311 can provide the outer beam 312 with a force on the side wall of the pit.

[0045] refer to Figure 2 A placement groove 5 is provided on the outer side of the hydraulic cylinder 21. The placement groove 5 is formed by welding steel plate 41 and includes a groove body 51 and a groove plate 52. The groove plate 52 is first cast into the side of the inner beam 311 facing the outer beam 312 by pre-embedded steel bars. The groove body 51 is then welded to the outer side of the groove plate 52. The upper part of the groove body 51 is open to facilitate the placement of the hydraulic cylinder 21 into the groove body 51. An opening is also provided on the side of the groove body 51 near the outer beam 312 to facilitate the extension of one end of the hydraulic cylinder 21 out of the groove body 51. An abutment plate 6 is provided between the hydraulic cylinder 21 and the outer beam 312. The abutment plate 6 is cast into the side of the outer beam 312 facing the inner beam 311 by pre-embedded steel bars. Thus, the abutment plate 6 and the groove plate 52 can reduce the damage of the hydraulic cylinder 21 to the outer beam 312 and the inner beam 311.

[0046] refer to Figure 3 Multiple hydraulic cylinders 21 are evenly arranged along the length of the outer beam 312 and the inner beam 311. The force applied by the hydraulic cylinder 21 near the end of the outer beam 312 close to the beam body 313 is less than the force applied by the hydraulic cylinder 21 near the middle of the outer beam 312. Furthermore, the force applied by the hydraulic cylinder 21 near the end of the outer beam 312 is equal to the earth pressure balance force, which is calculated based on the geological conditions. This ensures that the deformation on both sides of the interface between the ring beam 31 where hydraulic cylinders 21 are not installed and where hydraulic cylinders 21 are installed is stable. Meanwhile, the force of multiple hydraulic cylinders 21 gradually increases from both ends of the outer beam 312 to the middle of the outer beam 312, thereby increasing the force of the hydraulic cylinders 21 on the middle of the foundation pit where collapse is most likely to occur. At the same time, the foundation pit is less likely to collapse due to the limitation of soil stability at both ends of the foundation pit, thus being supported by the beam body 313 without the need to add force-adding devices 2. This allows the multiple force-adding devices 2 installed at the edge of the transverse support system to be fully utilized. Because the use of force-adding devices 2 is more reasonable, it can save the cost waste caused by excessive installation.

[0047] refer to Figure 4 Multiple corbels 7 are fixedly installed on the inner wall of the retaining structure 1. The corbels 7 can be installed by embedding rebar into the sidewall of the diaphragm wall. The top surface of the corbels 7 is used to support the outer beam 312, improving its stability. Before pouring concrete, horizontal rebar needs to be embedded into the sidewall of the diaphragm wall to reach the interior of the outer beam 312. Multiple outriggers 316 are spaced apart on the surface of the inner beam 311 near the outer beam 312. The outriggers 316 are positioned directly above the corbels 7, and the length of the corbels 7 exceeds that of the outer beam 312, allowing the outriggers 316 to rest on the corbels 7, thus ensuring the stability of the inner beam 311. Simultaneously, diagonal bracing 8 is installed above the outer beam 312. One end of the diagonal bracing 8 is embedded inside the outer beam 312, and the other end is fixed to the diaphragm wall according to the direction of the rebar embedment. The end of the diagonal bracing 8 away from the outer beam 312 faces and slopes towards the sidewall near the pit. Each ring beam 31 is relatively independent, and any ring beam 31 can be easily dismantled as needed during the construction process inside the foundation pit.

[0048] This embodiment discloses a construction method for concrete support using a servo system in a partial manner; it includes excavating the foundation pit within the retaining structure 1 to the depth of the designed concrete transverse support system 3, then constructing corbels 7 on the inner wall of the retaining structure 1, and then pouring a ring beam 31 above the corbels 7, forming a beam body 313, an outer beam 312, and an inner beam 311. Before pouring the outer beam 312, diagonal reinforcing bars 8 need to be fixed on the side wall of the retaining structure 1 by means of rebar installation. After the ring beam 31 reaches the design strength, a placement groove 5 is installed on the inner beam 311, and the groove 51 is fixed to the groove plate 52 by welding. Then, a force-applying device 2 is placed in the groove 51, and a horizontal force perpendicular to the axis of the outer beam 312 is applied to the outer beam 312 by the force-applying device 2. The force-applying device 2 includes a hydraulic cylinder 21. The force applied by the hydraulic cylinder 21 at the end of the outer beam 312 is equal to the earth pressure balance force, and the force applied by the hydraulic cylinder 21 gradually increases as it approaches the middle of the outer beam 312.

[0049] Example 2:

[0050] This embodiment discloses a concrete support structure that partially employs a servo system, referencing... Figure 5The difference from Embodiment 1 is that the sliding support 4 includes two toothed plates 42 and an abutment block 43. One side of the toothed plate 42 is a flat surface and is fixed to the end of the extension section 314 or the outer beam 312. The two toothed plates 42 correspond to the extension section 314 and the outer beam 312 respectively. A toothed groove 421 is opened on one side of the toothed plate 42. The toothed grooves 421 on the two toothed plates 42 are arranged opposite each other. The toothed grooves 421 are arranged vertically, and a sealing plate 44 is provided at the lower end of the toothed groove 421 to seal the lower end of the toothed groove 421. The abutment block 43 is a quadrangular prism. The abutment block 43 is arranged vertically and is vertically inserted into the toothed groove 421, so that the abutment block 43 slides in the toothed groove 421 in the vertical direction. At the same time, the abutment block 43 abuts against the side wall of the toothed groove 421. A wedge block 45 is provided at the bottom of the toothed groove 421. The included angle of the tip of the wedge block 45 is less than 2 degrees. Two wedges 45 are provided in the same tooth socket 421, one wedge 45 facing upwards and the other wedge 45 facing downwards. Since the two tooth sockets 421 are arranged opposite each other and each is provided with an abutment block 43, when the wedge 45 is inserted into the position between the bottom of the tooth socket 421 and the abutment block 43, the opposite surfaces of the two opposing abutment blocks 43 are parallel and abut against each other, and the angle between the abutting surfaces of the two abutment blocks 43 and the direction of the force applied by the force-applying device 2 is less than or equal to 2 degrees. In use, an abutment block 43 is placed inside the tooth socket 421, and then a wedge block 45 is inserted between the bottom of the tooth socket 421 and the abutment block 43. The wedge block 45 enables the two abutment blocks 43 to abut against each other. After the wedge block 45 is hammered, the force is applied to the outer beam 312 through the force-applying device 2. Since the two abutment blocks 43 are misaligned, the two abutment blocks 43 can use the mutual abutment surfaces and the direction of the force applied by the force-applying device 2 to tilt, which can make the outer beam 312 further compress the extension section 314, thereby enabling the outer beam 312 to better bear the axial force.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concrete support structure employing a localized servo system, comprising an enclosure (1), a force-applying device (2), and a concrete transverse support system (3), characterized in that: The concrete transverse support system (3) includes a ring beam (31), which is used to support the inner wall of the enclosure (1). The ring beam (31) includes an inner beam (311), an outer beam (312), and a beam body (313). The beam body (313) is located at both ends of each side of the enclosure (1). The inner beam (311) is located at the middle of the side of the enclosure (1). The two ends of the inner beam (311) are fixedly connected to two adjacent beam bodies (313). The outer beam (312) Parallel to the inner beam (311), the outer beam (312) is at the same height as the inner beam (311). The outer beam (312) is located on the side of the inner beam (311) facing the inner wall of the corresponding enclosure (1). The outer beam (312) and the inner beam (311) are spaced apart and used to place multiple force-adding devices (2). The end of the outer beam (312) is connected to the beam body (313) through a sliding support (4). The sliding direction of the sliding support (4) is horizontal and perpendicular to the axial direction of the outer beam (312). The beam body (313) has an extension section (314) at the end near the outer beam (312). The cross-section of the extension section (314) is the same as the cross-section of the outer beam (312). The end of the extension section (314) away from the beam body (313) faces the outer beam (312). The sliding support (4) is installed between the extension section (314) and the outer beam (312). The sliding support (4) includes a toothed plate (42) and an abutment block (43). There are two toothed plates (42). One toothed plate (42) is fixed at the end of the extension section (314), and the other toothed plate (42) is fixed at the end of the outer beam (312). The two toothed plates (42) have grooves (421) on their parallel and opposite surfaces. The abutment block (43) is a quadrangular prism and is vertically slidably connected in the groove (421). A wedge (45) is provided between the bottom of the groove (421) and the abutment block (43). The side of the abutment block (43) away from the wedge (45) abuts against each other. The angle between the surfaces of the two abutting blocks (43) that are close to each other and the direction of the force applied by the force-applying device (2) is less than or equal to 2 degrees; A sealing plate (44) is provided at the lower end of the alveolar bone (421).

2. A concrete support structure employing a servo system in a partial manner according to claim 1, characterized in that: The inner wall of the enclosure (1) is fixedly provided with a cow leg (7), the outer beam (312) is placed on the cow leg (7), and the inner beam (311) is provided with a plurality of outward extensions (316) on the side close to the outer beam (312); the outward extensions (316) are located directly above the cow leg (7) and are placed on the cow leg (7).

3. A concrete support structure employing a servo system in a partial manner according to claim 2, characterized in that: A diagonal bracing bar (8) is provided above the outer beam (312). One end of the diagonal bracing bar (8) is fixed to the enclosure (1) by means of rebar anchoring. The lower end of the diagonal bracing bar (8) is away from the side wall of the enclosure (1) and embedded in the outer beam (312).

4. A concrete support structure employing a servo system in a partial manner according to claim 1, characterized in that: An inclined beam (315) is provided at one end of the beam body (313) near the inner beam (311). The inclined beam (315), the beam body (313) and the inner beam (311) are integrally formed. The inclined beam (315) gradually tilts towards the end of the inner beam (311) as it extends along the length direction of the outer beam (312).

5. A method for constructing a concrete support structure using a partial servo system, for constructing a concrete support structure using a partial servo system as described in any one of claims 1-4, characterized in that: The device includes a force-applying device (2) between the inner beam (311) and the outer beam (312), which applies pressure. The force-applying device (2) includes a hydraulic cylinder (21). The hydraulic cylinder (21), which is arranged from both ends of the outer beam (312) towards the middle of the outer beam (312), gradually increases the force on the outer beam (312).

6. A concrete support construction method using a servo system in a localized manner according to claim 5, characterized in that: The force exerted by the hydraulic cylinder (21) at the end of the outer beam (312) on the outer beam (312) is equal to the earth pressure balance force.

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