Deep foundation pit concrete support structure and construction method

Abstract

The application relates to the technical field of foundation pit supporting, and particularly discloses a deep foundation pit concrete supporting structure and a construction method, which comprises a bottom plate, a top support and foldable supporting rods, the supporting rods comprise first pipe sections and second pipe sections, connecting pieces for rotatingly connecting the first pipe sections and the second pipe sections are arranged between the first pipe sections and the second pipe sections, one end of the first pipe section away from the second pipe section is connected with the bottom plate, one end of the second pipe section away from the first pipe section is connected with the top support, the rotating axes of the first pipe section and the second pipe section intersect with the length direction of the first pipe section, and adjusting assemblies for driving the first pipe section and the second pipe section to keep coaxial are arranged between the first pipe section and the second pipe section. The supporting structure can be folded, so that the effect that the supporting structure is transported in the foundation pit.

Description

Technical Field

[0001] This application relates to the field of foundation pit support technology, and in particular to a deep foundation pit concrete support structure and construction method. Background Technology

[0002] With the rapid development of modern industrial technology, the time requirements for construction operations in pits have also increased. To improve work efficiency, precast concrete components are now widely used for on-site assembly. However, when assembling precast concrete components in deep foundation pits, support structures are often required to support and position the concrete components.

[0003] The widely used support structures typically include support rods, with a base plate rotatably connected to one end of the support rod along its length, and a top support rotatably connected to the other end. By fixing the base plate to the bottom of the foundation pit and pressing or fixing the top support against or to the surface of the concrete component, the concrete component is supported and positioned.

[0004] During construction, because the base slab needs to be constantly supported and fixed to the bottom of the foundation pit, the support rods for erecting the upper part of the concrete components usually need to be quite long. However, due to the limited internal space of deep foundation pits, especially when construction materials, basement structures under construction, or scaffolding support structures are present, it is difficult for construction workers to move long support rods horizontally within the limited space. It is particularly difficult to turn and move long inclined supports in turning passages, which urgently needs improvement. Summary of the Invention

[0005] To address the problem of long support rods being difficult to transport within the foundation pit, this application provides a concrete support structure for deep foundation pits.

[0006] The technical solution for a deep foundation pit concrete support structure provided in this application is as follows:

[0007] A deep foundation pit concrete support structure includes a base plate, a top support, and a support rod. The support rod includes a first pipe section and a second pipe section. A connector is provided between the first pipe section and the second pipe section to rotatably connect them. The end of the first pipe section away from the second pipe section is connected to the base plate, and the end of the second pipe section away from the first pipe section is connected to the top support. The rotation axes of the first pipe section and the second pipe section intersect the length direction of the first pipe section. An adjustment component is provided between the first pipe section and the second pipe section to drive them to remain coaxial.

[0008] By adopting the above technical solution, when the support structure needs to be moved, construction workers can rotate the first or second pipe section to fold the support, significantly shortening the overall length of the support structure and facilitating its movement within the foundation pit. Once the support structure is transported to its destination, workers rotate the first or second pipe section and adjust the components to keep them coaxial, ensuring the support remains stable and straight. The concrete component is then supported by a top support at one end of the support rod and anchored to the bottom of the foundation pit by a base plate, thus securing the concrete component in place.

[0009] Optionally, the connector includes a connecting plate, on the surface of which a first connecting shaft and a second connecting shaft are spaced apart. One end of the first connecting shaft is slidably connected to the connecting plate in a direction close to or away from the second connecting shaft, and the other end of the first connecting shaft is rotatably connected to a first pipe segment. One end of the second connecting shaft is rotatably connected to the connecting plate, and the other end is rotatably connected to the second pipe segment.

[0010] By adopting the above technical solution, the connecting plate, through the first and second connecting shafts, achieves an anti-detachment connection between the first and second pipe sections, improving the overall integrity of the support structure. Simultaneously, by adjusting the rotation angle between each pipe section and the connecting plate, the support rod can be folded or unfolded, making operation flexible and convenient.

[0011] Optionally, the adjustment assembly includes a positioning column and an adjustment component. The positioning column is slidably installed in the second pipe section along the axial direction of the second pipe section, and the outer peripheral wall of the positioning column is slidably fitted with the inner peripheral wall of the second pipe section and the first pipe section. The adjustment component is used to drive the positioning column to move so that one end of the positioning column moves toward the second pipe section.

[0012] By adopting the above technical solution, after the first pipe section and the second pipe section are adjusted to a coaxial state, the staff adjusts the adjusting component so that the positioning column moves toward the first pipe section, so that one end of the positioning column extends into the first pipe section. At this time, the positioning column connects the first pipe section and the second pipe section, so that the first pipe section and the second pipe section remain in a coaxial state.

[0013] Optionally, the adjusting component includes an adjusting sleeve, which is rotatably disposed at one end of the second pipe section near the first pipe section, and its rotation axis is consistent with the axial direction of the second pipe section. The adjusting sleeve is threadedly fitted onto the outer periphery of the positioning post.

[0014] By adopting the above technical solution, the operator can drive the positioning column to move by rotating the adjusting sleeve through the assembly thread between the adjusting sleeve and the positioning column, thereby realizing the position adjustment of the positioning column. The operation is simple and convenient.

[0015] Optionally, a positioning ring is fixed to the periphery of the end of the positioning post away from the second pipe section, and the outer diameter of the positioning ring is larger than the inner diameter of the first pipe section.

[0016] By adopting the above technical solution, during use, after the positioning ring is pressed against the end face of the first pipe section, the operator continuously rotates the adjusting sleeve, causing the positioning column to continuously extend out of the second pipe section. Thus, the distance between the first and second pipe sections can be adjusted by moving the positioning column, thereby achieving fine adjustment of the length of the support structure.

[0017] Optionally, the positioning post has a mounting hole on its circumferential side at the end away from the second pipe section, a limiting block is movably disposed in the mounting hole, an elastic element is disposed in the mounting hole to drive one end of the limiting block to move out of the mounting hole, and a through hole is provided on the inner circumferential wall of the first pipe section for the limiting block to be inserted.

[0018] By adopting the above technical solution, during use, the operator presses the limiting block to retract it into the mounting hole. Then, the operator inserts the positioning pin into the first pipe section. Driven by the elastic element, the limiting block is inserted into the through hole, thus preventing the positioning pin from detaching from the first pipe section and significantly improving the overall stability of the support rod. Simultaneously, because the limiting block locks the positioning pin onto the first pipe section, when the operator rotates the adjusting sleeve, the adjusting sleeve can drive the positioning pin to move along the length of the second pipe section, thereby adjusting the distance between the first and second pipe sections.

[0019] Optionally, a rod is provided through the surface of the connecting plate. One end of the rod is elastically connected to the connecting plate, and the other end of the rod is adapted to be inserted into the through hole. The other end can be pressed to push out the limiting block in the through hole.

[0020] By adopting the above technical solution, when workers need to dismantle the support structure, they can press the insertion rod to push the limiting block, thereby separating the limiting block from the perforation. Then, by pulling the second rod segment, the positioning post on the second rod segment can be separated from the first rod segment, thus releasing the coaxial positioning state of the first and second rod segments.

[0021] Optionally, the first pipe segment is provided with a positioning rod, which slides radially along the first pipe segment. An elastic element is provided between the first pipe segment and the positioning rod to elastically connect the two. A support plate is fixed on the surface of the base plate, and multiple positioning holes are opened on the surface of the support plate. When the limiting block is inserted into the through hole, the positioning column presses the positioning rod, so that one end of the positioning rod is inserted into a certain positioning hole.

[0022] By adopting the above technical solution, when the positioning column presses the positioning rod and one end of the positioning rod is inserted into a positioning hole, the first pipe section on the base plate will be difficult to rotate. Under this setting, the first pipe section and the base plate are locked at the current support angle, making it difficult for the support structure to loosen or shake during the support process, thereby improving the support stability of the support structure for the concrete component.

[0023] The second aspect of this application provides a construction method for a deep foundation pit concrete support structure, which adopts the following technical solution:

[0024] A construction method for a deep foundation pit concrete support structure, based on any of the deep foundation pit concrete support structures described in the first aspect, includes: rotating the support member and adjusting the adjustment assembly to make the first pipe segment and the second pipe segment in the support member coaxial; fixing the bottom plate to the foundation at the bottom of the foundation pit; and fixing the top support to the surface of the concrete pouring formwork.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. When it is necessary to transfer the support structure, the construction workers can rotate the first or second pipe section to make the support components folded, which greatly shortens the overall length of the support structure, so as to facilitate the construction workers to transfer the support structure in the foundation pit.

[0027] 2. The connecting plate is designed to prevent the first pipe section and the second pipe section from detaching through the first connecting shaft and the second connecting shaft. By adjusting the rotation angle between each pipe section and the connecting plate, the support rod can be folded or unfolded, making the operation flexible and convenient.

[0028] 3. When the positioning column presses down on the positioning rod, causing one end of the positioning rod to be inserted into a positioning hole, the first pipe section on the base plate will be difficult to rotate. Under this setting, the first pipe section and the base plate are locked at the current support angle, making the support structure less prone to loosening or shaking during the support process, thereby improving the support stability of the support structure for the concrete component. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;

[0030] Figure 2 This is a cross-sectional view showing the internal structure of the second pipe section in Embodiment 1;

[0031] Figure 3 This is a partial structural schematic diagram of Embodiment 2 of this application.

[0032] Figure 4 This is a schematic diagram of the overall structure of Embodiment 3 of this application;

[0033] Figure 5 This is a cross-sectional view showing the internal structure of the first and second pipe sections in Embodiment 3.

[0034] Reference numerals: 1. Base plate; 11. Support plate; 111. Positioning hole; 2. Top support; 3. Support rod; 31. First pipe section; 311. Floating spring; 32. Second pipe section; 321. Strip hole; 41. Connecting plate; 411. First connecting shaft; 412. Second connecting shaft; 413. Mounting groove; 51. Positioning post; 511. Guide block; 512. Cross lever; 52. Adjusting component; 521. Adjusting sleeve; 522. Threaded sleeve; 53. Positioning ring; 6. Limiting block; 7. Elastic component; 8. Insert rod; 81. Return spring; 9. Positioning rod; 91. Upper rod section; 92. Lower rod section; 10. Mounting ring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0036] This application discloses a concrete support structure for deep foundation pits.

[0037] Example 1:

[0038] Reference Figure 1 The deep foundation pit concrete support structure includes a base plate 1, a top support 2, and a foldable support rod 3. The support rod 3 includes a first pipe section 31 and a second pipe section 32. A connecting piece is provided between the first pipe section 31 and the second pipe section 32 to rotatably connect the two. The end of the first pipe section 31 away from the second pipe section 32 is rotatably connected to the base plate 1, and the end of the second pipe section 32 away from the first pipe section 31 is rotatably connected to the top support 2. The rotation axis of the first pipe section 31 and the second pipe section 32 is perpendicular to the length direction of the first pipe section 31. An adjustment component is provided between the first pipe section 31 and the second pipe section 32 to keep them on the same axis.

[0039] Furthermore, refer to Figure 1 In this embodiment, two connectors are symmetrically arranged radially along the first pipe segment 31. Each connector includes a connecting plate 41, on which a first connecting shaft 411 and a second connecting shaft 412 are spaced apart. One end of the first connecting shaft 411 is rotatably connected to the connecting plate 41, and the other end is rotatably connected to the first pipe segment 31. A mounting groove 413 is formed on the surface of the connecting plate 41 along its length. One end of the second connecting shaft 412 is slidably mounted on the mounting groove 413 of the connecting plate 41 in a direction close to or away from the first connecting shaft 411, and one end of the second connecting shaft 412 can rotate within the mounting groove 413. The other end of the second connecting shaft 412 is rotatably connected to the second pipe segment 32. It should be noted that the rotation axes of both the first connecting shaft 411 and the second connecting shaft 412 are aligned with the radial direction of the first pipe segment 31.

[0040] In another embodiment, the connector includes a strip plate, one end of which is rotatably connected to the first pipe section 31 via a pivot, and the other end of which is rotatably connected to the second pipe section 32 via another pivot.

[0041] Furthermore, refer to Figure 1 and Figure 2 The adjustment assembly includes a positioning post 51 and an adjusting member 52. The positioning post 51 is axially movably disposed within the second pipe section 32, and the outer peripheral wall of the positioning post 51 is slidably fitted with the inner peripheral wall of the second pipe section 32 and the first pipe section 31. The adjusting member 52 is disposed on the second pipe section 32 and is used to drive the positioning post 51 to move so that one end of the positioning post 51 moves toward the first pipe section 31.

[0042] Specifically, in this embodiment, a strip-shaped hole 321 is provided on the inner wall of the second pipe section 32, a guide block 511 is fixed on the periphery of one end of the positioning post 51 in the length direction, and an external thread is provided on the periphery of the middle part; the guide block 511 is slidably installed in the strip-shaped hole 321 along the axial direction of the second pipe section 32 to realize the directional sliding of the positioning post 51 in the second pipe section 32.

[0043] The adjusting component 52 includes an adjusting sleeve 521, which is rotatably disposed at one end of the second pipe section 32 near the first pipe section 31, and its rotation axis is consistent with the axial direction of the second pipe section 32. The inner cavity of the adjusting sleeve 521 is provided with an internal thread that is compatible with the external thread, and the adjusting sleeve 521 is screw-fitted to the outer periphery of the positioning post 51.

[0044] Furthermore, a positioning ring 53 is fixed to the periphery of the end of the positioning post 51 away from the second pipe section 32, and the positioning ring 53 does not protrude from the end face of the second pipe section 32. The outer diameter of the positioning ring 53 is larger than the inner diameter of the first pipe section 31.

[0045] Furthermore, in other embodiments, a guide plate is fixed to the surface of the second pipe segment 32. When the first pipe segment 31 and the second pipe segment 32 are coaxial, the guide plate fits against the outer periphery of the first pipe segment 31, so that the operator can quickly rotate and adjust the first pipe segment 31 and the second pipe segment 32 to a coaxial state.

[0046] The implementation principle of a deep foundation pit concrete support structure in this application embodiment is as follows: when the support structure needs to be transferred, the construction personnel rotate the first pipe section 31 or the second pipe section 32 so that the first pipe section 31 and the second pipe section 32 are close to each other, so that the support is in a folded state, which greatly shortens the overall length of the support structure, so as to facilitate the construction personnel to carry out the transfer operation of the support structure in the foundation pit.

[0047] When concrete components require support, workers fix the base plate 1 to the foundation pit bottom. Then, they rotate the second pipe section 32 to make the guide plate fit against the outer circumference of the first pipe section 31, thus adjusting the first pipe section 31 and the second pipe section 32 to a coaxial state. Next, workers move the second pipe section 32 so that the positioning post 51 on the second pipe section 32 moves towards the first pipe section 31, allowing one end of the positioning post 51 to extend into the first pipe section 31. At this point, the positioning post 51 connects the first pipe section 31 and the second pipe section 32, and the positioning ring 53 on the positioning post 51 abuts against the end face of the first pipe section 31, keeping the first pipe section 31 and the second pipe section 32 coaxial. Then, workers continuously rotate the adjusting sleeve 521, causing the positioning post 51 to continuously extend out of the second pipe section 32. This adjustment of the distance between the first pipe section 31 and the second pipe section 32 is achieved through the moving positioning post 51, enabling fine-tuning of the length of the support structure. This allows the top support 2 to abut against the surface of the concrete component, thus completing the stable support of the concrete component.

[0048] Example 2:

[0049] Reference Figure 3 The difference between this embodiment and Embodiment 1 is that the adjusting component 52 includes a threaded sleeve 522 coaxially fixed to the end face of the second pipe section 32 away from the top support 2. The positioning pin 51 is threaded into the inner cavity of the threaded sleeve 522, and a cross lever 512 is fixed to the periphery of the positioning pin 51 away from the second pipe section 32. During use, the operator turns the cross lever 512 to make the positioning pin 51 move spirally under the guidance of the threaded sleeve 522. Then, the positioning pin 51 connects between the first pipe section 31 and the second pipe section 32, and the positioning ring 53 on the positioning pin 51 abuts against the end face of the first pipe section 31, so that the first pipe section 31 and the second pipe section 32 remain coaxial. Then, the operator continues to turn the cross lever 512, so that the positioning pin 51 continues to extend out of the second pipe section 32, thereby adjusting the distance between the first pipe section 31 and the second pipe section 32 through the moving positioning pin 51, and realizing the fine adjustment of the length of the support structure.

[0050] Example 3:

[0051] Reference Figure 4 The difference between this embodiment and Embodiment 1 is that: a mounting hole is provided on the periphery of the end of the positioning post 51 away from the second pipe section 32, and a limiting block 6 is slidably disposed radially within the mounting hole of the positioning post 51. An elastic element 7 is disposed within the mounting hole of the positioning post 51. The elastic element 7 can be any one of a spring, a sheet, or an elastic pad. The elastic element 7 elastically connects the inner wall of the mounting hole and the inner surface of the limiting block 6. When the elastic element 7 is in a freely relaxed state, the elastic element 7 drives one end of the limiting block 6 to move out of the mounting hole. When the elastic element 7 or the limiting block 6 is pressed, the limiting block 6 is submerged in the mounting hole, and the elastic element 7 is in a compressed state.

[0052] During use, the operator presses the limiting block 6 to retract it into the mounting hole. Then, the operator inserts the positioning pin 51 into the first pipe section 31. Driven by the elastic element 7, the limiting block 6 is inserted into the through hole, thus preventing the positioning pin 51 from detaching from the first pipe section 31 and significantly improving the overall stability of the support rod 3. Simultaneously, because the limiting block 6 locks the positioning pin 51 onto the first pipe section 31, when the operator rotates the adjusting sleeve 521, the adjusting sleeve 521 can drive the positioning pin 51 to move along the length of the second pipe section 32, thereby adjusting the distance between the first pipe section 31 and the second pipe section 32.

[0053] Furthermore, a rod 8 is inserted through the surface of the connecting plate 41. A return spring 81 is fixedly sleeved around one end of the rod 8. The end of the return spring 81 away from the rod 8 is fixedly connected to the connecting plate 41, so as to achieve an elastic connection between the rod 8 and the connecting plate 41 through the return spring 81. The other end of the rod 8 is adapted to be inserted into the through hole, and the other end can be pressed to push out the limiting block 6 in the through hole.

[0054] In this embodiment, when the return spring 81 is in a freely relaxed state, one end of the insertion rod 8 is inserted into the through hole, and there is still space in the through hole for the limiting block 6 to be inserted; that is, the limiting block 6 and the insertion rod 8 can be held together in the state of being inserted into the through hole. Under this setting, when the operator rotates the first pipe segment 31 and the second pipe segment 32 to a coaxial state, the insertion rod 8 will also move along the outer surface contour of the first pipe segment 31 to the through hole, and under the restoring force of the return spring 81, it will be inserted into the through hole, thereby achieving the pre-positioning of the first pipe segment 31 and the second pipe segment 32.

[0055] In another embodiment, when the reset spring 81 is in a freely relaxed state, one end of the insert rod 8 is separated from the through hole. Under this setting, the operator only needs to align the insert rod 8 with the through hole and press the insert rod 8 to push the limiting block 6 out of the through hole.

[0056] Furthermore, refer to Figure 4 and Figure 5A positioning rod 9 is provided inside the first pipe section 31. The positioning rod 9 slides radially along the first pipe section 31, and an elastically connecting device is provided between the first pipe section 31 and the positioning rod 9. In this embodiment, the positioning rod 9 includes an upper rod section 91 and a lower rod section 92 threadedly connected to one end of the upper rod section 91. An annular groove is formed on the circumference of the upper rod section 91 facing the lower rod section 92. The mounting device is a floating spring 311. An mounting ring 10 is fixed inside the first pipe section 31, and the floating spring 311 is sleeved in the annular groove on the circumference of the upper rod section 91. One end of the floating spring 311 is fixed to the upper rod section 91, and the other end is fixed to the mounting ring 10. The floating spring 311 elastically supports the positioning rod 9 inside the first pipe section 31.

[0057] Furthermore, the end of the first pipe segment 31 furthest from the second pipe segment 32 is Y-shaped, and a support plate 11 is fixed to the surface of the base plate 1. The first pipe segment 31 is rotatably connected to the support plate 11 via a pivot. The surface of the support plate 11 is semi-circular, and multiple positioning holes 111 are spaced apart along the rotation direction of the first pipe segment 31. When the limiting block 6 is inserted into the through hole, the positioning post 51 presses down on the positioning rod 9, causing one end of the lower rod segment 92 of the positioning rod 9 to insert into a positioning hole 111, thereby locking the first pipe segment 31 onto the support plate 11. Under this configuration, the first pipe segment 31 and the base plate 1 are locked at the current support angle, making it less prone to loosening or shaking during the support process, thus improving the support stability of the concrete component.

[0058] When the support structure needs to be disassembled, the worker presses the insertion rod 8 to separate the limiting block 6 from the through hole. Then, the positioning rod 9 pushes the positioning column 51 under the restoring force of the floating spring 311, thereby automatically separating the positioning column 51 from the first insertion rod 8. This reduces the need for the worker to pull the second insertion rod 8 to actively separate the positioning column 51 from the first insertion rod 8.

[0059] This application also discloses a construction method for a deep foundation pit concrete support structure, based on any of the aforementioned deep foundation pit concrete support structures. The construction method for this deep foundation pit concrete support structure includes:

[0060] Fix the base plate 1 to the foundation at the bottom of the pit;

[0061] Rotate the second pipe section 32 so that the first pipe section 31 and the second pipe section 32 are coaxial;

[0062] Adjust the adjustment components to keep the first pipe section 31 and the second pipe section 32 on the same axis;

[0063] Press the top support 2 firmly against the surface of the concrete component.

[0064] 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 for deep foundation pits, characterized in that: The system includes a base plate (1), a top support (2), and a foldable support rod (3). The support rod (3) includes a first pipe section (31) and a second pipe section (32). A connecting piece is provided between the first pipe section (31) and the second pipe section (32) to rotatably connect the two. The end of the first pipe section (31) away from the second pipe section (32) is connected to the base plate (1), and the end of the second pipe section (32) away from the first pipe section (31) is connected to the top support (2). The rotation axis of the first pipe section (31) and the second pipe section (32) intersects the length direction of the first pipe section (31). An adjustment component is provided between the first pipe section (31) and the second pipe section (32) to keep them on the same axis. The adjustment assembly includes a positioning column (51) and an adjustment member (52). A portion of the positioning column (51) is axially movably disposed within the second pipe section (32). The outer peripheral wall of the positioning column (51) is slidably fitted with the inner peripheral walls of the second pipe section (32) and the first pipe section (31). The adjustment member (52) is disposed on the second pipe section (32) and is used to drive the positioning column (51) to move so that one end of the positioning column (51) moves toward the first pipe section (31). The adjusting component (52) includes an adjusting sleeve (521), which is rotatably disposed at one end of the second pipe section (32) near the first pipe section (31), and its rotation axis is consistent with the axial direction of the second pipe section (32). The adjusting sleeve (521) is spirally assembled on the outer periphery of the positioning post (51). The connector includes a connecting plate (41), on which a first connecting shaft (411) and a second connecting shaft (412) are spaced apart. One end of the first connecting shaft (411) is rotatably connected to the connecting plate (41), and the other end is rotatably connected to the first pipe section (31). One end of the second connecting shaft (412) is slidably connected to the connecting plate (41) in a direction close to or away from the first connecting shaft (411), and the other end of the second connecting shaft (412) is rotatably connected to the second pipe section (32).

2. The deep foundation pit concrete support structure according to claim 1, characterized in that: A positioning ring (53) is fixed around the end of the positioning post (51) away from the second pipe section (32), and the outer diameter of the positioning ring (53) is larger than the inner diameter of the first pipe section (31).

3. The deep foundation pit concrete support structure according to claim 1, characterized in that: The positioning post (51) has an installation hole on its periphery at one end away from the second pipe section (32). A limiting block (6) is movably provided in the installation hole of the positioning post (51). An elastic element (7) is provided in the installation hole to drive one end of the limiting block (6) to move out of the installation hole. A through hole is provided on the inner periphery of the first pipe section (31) for the limiting block (6) to be inserted.

4. A deep foundation pit concrete support structure according to claim 3, characterized in that: The connecting plate (41) is provided with a rod (8) through it. One end of the rod (8) is elastically connected to the connecting plate (41), and the other end of the rod (8) can be pressed to push out the limiting block (6) in the through hole.

5. A deep foundation pit concrete support structure according to claim 4, characterized in that: A positioning rod (9) is provided inside the first pipe section (31). The positioning rod (9) slides radially along the first pipe section (31). An installation component that elastically connects the first pipe section (31) and the positioning rod (9) is provided. A support plate (11) is fixed on the surface of the base plate (1). A plurality of positioning holes (111) are opened on the surface of the support plate (11). When the limiting block (6) is inserted into the through hole, the positioning post (51) presses the positioning rod (9) so that one end of the positioning rod (9) is inserted into a positioning hole (111).

6. A construction method for a deep foundation pit concrete support structure, based on a deep foundation pit concrete support structure as described in any one of claims 1-5, characterized in that: The construction method includes: Fix the base plate (1) to the foundation at the bottom of the pit; Rotate the second pipe section (32) so that the first pipe section (31) and the second pipe section (32) are coaxial; Adjust the adjustment components to keep the first pipe section (31) and the second pipe section (32) on the same axis; Press the top support (2) firmly against the surface of the concrete component.

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