A concrete support structure for deep foundation pits in soft soil

Abstract

This application discloses a concrete support structure for deep foundation pits in soft soil foundations, relating to the field of concrete support. It includes a waler, with a concrete support member fixed to one side of the waler. A groove is formed on the other side of the waler, and an installation plate is placed inside the groove. A base plate is fixed to the middle of one side of the installation plate, and a jack is fixed to the middle of one side of the base plate. After installation, the jack is extended by lifting it, causing the compression plate to contact the waler. The jack is lifted until it is difficult to lift further, and the limiting columns on both sides provide support, further improving the jack's supporting strength and stability. A steel support servo system is integrated into the concrete support system, expanding the applicability of the support servo. The resulting active deformation control technology for concrete support in soft soil foundation pits can effectively control the displacement of the retaining structure, reduce disturbance to surrounding important structures and pipelines, and meet the requirements for micro-deformation control.

Description

Technical Field

[0001] This application relates to the field of concrete supports, and more particularly to a concrete support structure for deep foundation pits in soft soil. Background Technology

[0002] In sensitive areas such as rail transit, historical buildings, and major pipelines, the environmental protection of foundation pits has entered the era of "millimeter-level" micro-deformation control. Concrete supports have the advantages of high overall rigidity, high bearing capacity, strong adaptability to planar forms, and flexible layout, and are widely used. However, the construction and dismantling of supports are time-consuming, waste materials, have a passive stress form, and the development of deformation is uncontrollable.

[0003] Existing concrete support structures are usually formed by directly binding steel bars and then pouring concrete. However, the lateral space inside a deep foundation pit is large, and the soil walls around the deep foundation pit will generate a lot of pressure. In severe cases, the underground walls may crack and collapse. The measured axial force of existing concrete support structures is far less than the design bearing capacity, and a lot of materials are needed to meet the design standards. Utility Model Content

[0004] To address the problem that the measured axial force of existing concrete support structures is far less than the design bearing capacity, requiring a large amount of materials to meet the design standards, this application provides a concrete support structure for deep foundation pits in soft soil.

[0005] The present application provides a concrete support structure for deep foundation pits on soft soil foundations, which adopts the following technical solution: It includes a waler, a concrete support member fixed to one side of the waler, a groove formed on the other side of the waler, an installation plate placed inside the groove, a base plate fixed to the middle of one side of the installation plate, a jack fixed to the middle of one side of the base plate, a pressing plate fixed to the power output end of the jack, a connecting plate detachably connected to the outer wall of the concrete support member, and a first slider slidably connected to the top of the connecting plate via a guide rail. Two first sliders are provided, and a threaded rod is threadedly connected to the middle of one side of each of the two first sliders. An auxiliary installation mechanism is fixed to one side of the connecting plate.

[0006] By adopting the above technical solution, when installing the support structure, the auxiliary installation mechanism is first connected to the concrete support component. By rotating the threaded rod, the two first sliders move towards the center at the same time. The first sliders are clamped on the concrete support component to support the support rod, so that the support mechanism can be placed on the support rod for installation during subsequent installation.

[0007] Preferably, the mounting plate has threaded holes at the four upper and four lower corners of the base plate, and baffles are fixed to the top of the base plate and the top of the extrusion plate.

[0008] By adopting the above technical solution, during installation, the four threaded holes on the top of the mounting plate are connected to the concrete wall using expansion bolts. After multiple mounting plates are installed, the support rod is removed, and then the four threaded holes on the bottom of the mounting plate are installed with expansion bolts. The jack is then covered by a baffle.

[0009] Preferably, a limiting plate is fixed to the top of one end of the base plate, and limiting columns are fixed to both sides of the base plate near the jack. The limiting columns pass through the limiting plate and are connected to the extrusion plate.

[0010] By adopting the above technical solution and using the limiting columns on both sides for support, the support strength and stability of the jack are further improved.

[0011] Preferably, the base plate is located inside the groove, and the extrusion plate is in contact with the waler.

[0012] By adopting the above technical solution, after installation, the jack is lifted and extended so that the compression plate and the waler touch each other, and the jack is lifted until it is difficult to lift it any further.

[0013] Preferably, the auxiliary installation mechanism includes a connecting rod, which is fixed to the bottom of the connecting plate, and a support rod is fixed to the other end of the connecting rod, the support rod being L-shaped.

[0014] By adopting the above technical solution, the support rod is fixed by connecting the first slider to the concrete support component. The top of the support rod can be used to place the support mechanism, avoiding the need for a person to hold the support mechanism during installation.

[0015] Preferably, a groove is provided in the middle of the bottom of the inner wall of the support rod, and a second slider is slidably connected inside the groove. A pad is fixed on the top of the second slider, and the top of the pad is on the same horizontal plane as the bottom of the waler.

[0016] By adopting the above technical solution, the position of the pad is adjusted according to the position of the groove, the second slider is moved to slide inside the groove, the pad is moved to the bottom of the groove, and then the mounting plate and the base plate are placed on top of the pad.

[0017] Preferably, the threads at both ends of the threaded rod are in opposite directions, and a knob is fixed at one end of the threaded rod, and the first slider is L-shaped.

[0018] By adopting the above technical solution, the screw rod is rotated by turning the knob, which in turn drives the two first sliders to move towards the center at the same time, and the L-shaped first sliders are clamped on the top of the concrete support.

[0019] In summary, this application includes at least the following beneficial technical effects:

[0020] 1. After installation, this application elongates the jacks so that the compression plate touches the waler. The jacks are then pushed until they can no longer be lifted. The limiting columns on both sides provide support, which further improves the jack's support strength and stability. The steel support servo system is integrated into the concrete support system, expanding the application range of the support servo. The resulting active deformation control technology for soft soil foundation pit concrete support can effectively control the displacement of the retaining structure, reduce disturbance to surrounding important structures and pipelines, and meet the requirements for micro-deformation control.

[0021] 2. This application uses a knob to rotate the threaded rod, which in turn moves the two first sliders towards the center simultaneously. The L-shaped first slider is clamped on the top of the concrete support member to support the support rod. The top of the support rod can be used to place the support mechanism, avoiding the need for a person to hold the support mechanism during installation. The second slider is moved to slide inside the groove to move the pad to the bottom of the groove. Then, the mounting plate and the base plate are placed on top of the pad, thus achieving a more convenient installation of the support mechanism. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a concrete support structure for a deep foundation pit in soft soil, according to an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of the structure at the installation mechanism in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the jack structure in an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the structure at the mounting plate in an embodiment of this application;

[0026] Reference numerals: 1. Concrete wall; 2. Waler; 3. Concrete support; 4. Groove; 5. Connecting plate; 6. Guide rail; 7. First slider; 8. Knob; 9. Threaded rod; 10. Connecting rod; 11. Support rod; 12. Slide groove; 13. Second slider; 14. Pad; 15. Mounting plate; 16. Threaded hole; 17. Base plate; 18. Limiting plate; 19. Jack; 20. Limiting post; 21. Extrusion plate; 22. Baffle. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0028] This application discloses a concrete support structure for a deep foundation pit in soft soil, including a waler 2. A concrete support member 3 is fixed to one side of the waler 2, and a groove 4 is formed on the other side of the waler 2. An installation plate 15 is placed inside the groove 4. A base plate 17 is fixed to the middle of one side of the installation plate 15, and a jack 19 is fixed to the middle of one side of the base plate 17. An extrusion plate 21 is fixed to the power output end of the jack 19. A connecting plate 5 is detachably connected to the outer wall of the concrete support member 3. During installation, the connecting plate 5 is placed into the groove 4, and then the connecting plate 5 is connected to the concrete wall 1. The top of the connecting plate 5 is slidably connected to a first slider 7 via a guide rail 6. There are two first sliders 7, and a threaded rod 9 is threadedly connected through the middle of one side of each of the two first sliders 7. An auxiliary installation mechanism is fixed on one side of the connecting plate 5. When installing the support structure, the auxiliary installation mechanism is first connected to the concrete support 3. By rotating the threaded rod 9, the two first sliders 7 move towards the middle at the same time. The first sliders 7 are clamped on the concrete support 3 to support the support rod 11, so that the support mechanism can be placed on the support rod 11 for installation during subsequent installation.

[0029] Reference Appendix Figure 4 The mounting plate 15 has threaded holes 16 at the four upper and four lower corners of the base plate 17. The top of the base plate 17 and the top of the extrusion plate 21 are fixed with baffles 22. During installation, the four threaded holes 16 at the top of the mounting plate 15 are connected to the concrete wall 1 with expansion bolts. After all the mounting plates 15 are installed, the support rod 11 is removed, and the four threaded holes 16 at the bottom of the mounting plate 15 are then installed with expansion bolts. The baffles 22 are used to cover the jack 19.

[0030] Reference Appendix Figure 3 The bottom plate 17 has a limit plate 18 fixed at one top end, and limit posts 20 are fixed on both sides of the bottom plate 17 near the jack 19. The limit posts 20 pass through the limit plate 18 and are connected to the compression plate 21. The jack 19 is supported by the limit posts 20 on both sides, which further improves the support strength and stability of the jack 19.

[0031] Reference Appendix Figure 1 The base plate 17 is located inside the groove 4, and the extrusion plate 21 is in contact with the waler 2. After installation, the jack 19 is lifted and extended so that the extrusion plate 21 and the waler 2 touch each other. The jack 19 is then lifted until it is difficult to lift it any further.

[0032] Reference Appendix Figure 2 The auxiliary installation mechanism includes a connecting rod 10, which is fixed to the bottom of the connecting plate 5, and a support rod 11 is fixed to the other end of the connecting rod 10. The support rod 11 is L-shaped and is connected to the concrete support 3 through the first slider 7 to fix the support rod 11. The top of the support rod 11 can be used to place the support mechanism, avoiding the need for a person to hold the support mechanism during installation.

[0033] Reference Appendix Figure 2 The support rod 11 has a groove 12 in the middle of the bottom of its inner wall. A second slider 13 is slidably connected inside the groove 12. A pad 14 is fixed on the top of the second slider 13. The top of the pad 14 is on the same horizontal plane as the bottom of the waler 2. The position of the pad 14 is adjusted according to the position of the groove 4. The second slider 13 is moved to slide inside the groove 12. The pad 14 is moved to the bottom of the groove 4. Then the mounting plate 15 and the base plate 17 are placed on top of the pad 14.

[0034] Reference Appendix Figure 2 The threaded rod 9 has opposite thread directions at both ends in the middle, and a knob 8 is fixed at one end of the threaded rod 9. The first slider 7 is L-shaped. By rotating the knob 8, the threaded rod 9 is rotated, which in turn drives the two first sliders 7 to move towards the middle at the same time. The L-shaped first sliders 7 are clamped on the top of the concrete support 3.

[0035] The implementation principle of a concrete support structure for a deep foundation pit on soft soil foundation according to an embodiment of this application is as follows: First, rotate the knob 8 to drive the threaded rod 9 to rotate, which in turn drives the two first sliders 7 to move towards the center simultaneously. The L-shaped first sliders 7 are clamped on the top of the concrete support member 3 to support the support rod 11. The top of the support rod 11 can be used to place the support mechanism, avoiding the need for a person to hold the support mechanism during installation. Move the second slider 13 to slide inside the groove 12, move the pad 14 to the bottom of the groove 4, and then place the mounting plate 15 and the base plate 17 on top of the pad 14. During installation, the four threaded holes 16 on the top of the mounting plate 15 are connected to the concrete wall 1 using expansion bolts. After all the mounting plates 15 are installed, the support rod 11 is removed, and then the four threaded holes 16 on the bottom of the mounting plate 15 are installed with expansion bolts. The baffle 22 is used to cover the jack 19, and the limiting posts 20 on both sides are used for support, which further improves the support strength and stability of the jack 19. After installation, the jack 19 is lifted up and extended so that the extrusion plate 21 touches the waler 2. The jack 19 is lifted until it is difficult to lift it any further.

[0036] 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 a deep foundation pit on soft soil foundation, comprising a waler (2), wherein a concrete support member (3) is fixed to one side of the waler (2), characterized in that: A groove (4) is provided on the other side of the waler (2). An installation plate (15) is placed inside the groove (4). A base plate (17) is fixed in the middle of one side of the installation plate (15). A jack (19) is fixed in the middle of one side of the base plate (17). An extrusion plate (21) is fixed at the power output end of the jack (19). A connecting plate (5) is detachably connected to the outer wall of the concrete support (3). A first slider (7) is slidably connected to the top of the connecting plate (5) through a guide rail (6). There are two first sliders (7), and a threaded rod (9) is threaded through the middle of one side of each of the two first sliders (7). An auxiliary installation mechanism is fixed to one side of the connecting plate (5).

2. The soft soil foundation deep foundation pit concrete support structure according to claim 1, characterized in that: The mounting plate (15) has threaded holes (16) at the four upper and four lower corners of the base plate (17), and baffles (22) are fixed on the top of the base plate (17) and the top of the extrusion plate (21).

3. The soft soil foundation deep foundation pit concrete support structure according to claim 1, characterized in that: A limiting plate (18) is fixed at the top of one end of the base plate (17), and limiting posts (20) are fixed on both sides of the base plate (17) near the jack (19). The limiting posts (20) penetrate the limiting plate (18) and are connected to the extrusion plate (21).

4. The soft ground deep foundation concrete support structure according to claim 1, wherein: The bottom plate (17) is located inside the groove (4), and the extrusion plate (21) is in contact with the waler (2).

5. The soft ground deep excavation concrete support structure according to claim 1, wherein: The auxiliary installation mechanism includes a connecting rod (10), which is fixed to the bottom of the connecting plate (5), and a support rod (11) is fixed to the other end of the connecting rod (10). The support rod (11) is L-shaped.

6. A concrete support structure for deep foundation pits in soft soil foundations according to claim 5, characterized in that: A groove (12) is provided in the middle of the bottom of the inner wall of the support rod (11). A second slider (13) is slidably connected inside the groove (12). A pad (14) is fixed on the top of the second slider (13). The top of the pad (14) is on the same horizontal plane as the bottom of the waler (2).

7. The soft ground deep excavation concrete support structure according to claim 6, wherein: The threaded rod (9) has opposite thread directions at both ends in the middle, and a knob (8) is fixed at one end of the threaded rod (9). The first slider (7) is L-shaped.

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